/* roulang page: index */
:root {
            --kaiyun-primary: #28B8A6;
            --kaiyun-primary-dark: #1F9E8F;
            --kaiyun-primary-light: #E8F7F5;
            --kaiyun-secondary: #D9A86C;
            --kaiyun-coral: #E38B6D;
            --kaiyun-dark: #1B1F24;
            --kaiyun-darker: #15181C;
            --kaiyun-bg: #F5F7F6;
            --kaiyun-card: #FFFFFF;
            --kaiyun-text: #2A3038;
            --kaiyun-text-muted: #6B7480;
            --kaiyun-text-light: #A8B0B8;
            --kaiyun-border: #D9DEE3;
            --kaiyun-border-light: #E8ECEF;
            --kaiyun-radius-sm: 8px;
            --kaiyun-radius: 12px;
            --kaiyun-radius-lg: 16px;
            --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
            --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
            --kaiyun-transition: all 0.2s ease;
            --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kaiyun-font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kaiyun-text);
            background-color: var(--kaiyun-bg);
            overflow-x: hidden;
        }

        a {
            color: var(--kaiyun-primary);
            text-decoration: none;
            transition: var(--kaiyun-transition);
        }
        a:hover {
            color: var(--kaiyun-primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(40, 184, 166, 0.4);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .kaiyun-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--kaiyun-card);
            box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }

        .kaiyun-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .kaiyun-logo:hover {
            color: var(--kaiyun-dark);
        }
        .kaiyun-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-brand-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .kaiyun-search-box {
            display: flex;
            align-items: center;
            background: var(--kaiyun-bg);
            border: 1px solid var(--kaiyun-border);
            border-radius: 999px;
            padding: 6px 16px;
            gap: 8px;
            min-width: 220px;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-search-box:focus-within {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        }
        .kaiyun-search-box i {
            color: var(--kaiyun-text-muted);
            font-size: 14px;
        }
        .kaiyun-search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--kaiyun-text);
            width: 100%;
            font-family: var(--kaiyun-font);
        }
        .kaiyun-search-box input::placeholder {
            color: var(--kaiyun-text-light);
        }

        .kaiyun-login-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            background: transparent;
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }
        .kaiyun-login-btn:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary);
        }
        .kaiyun-primary-btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }
        .kaiyun-primary-btn-sm:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(40, 184, 166, 0.3);
        }

        .kaiyun-channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            padding: 4px 0 8px;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .kaiyun-channel-row::-webkit-scrollbar {
            display: none;
        }
        .kaiyun-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 7px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--kaiyun-text-muted);
            border-radius: 999px;
            white-space: nowrap;
            transition: var(--kaiyun-transition);
            border: 1px solid transparent;
        }
        .kaiyun-channel-link:hover {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }
        .kaiyun-channel-link.active {
            background: var(--kaiyun-primary);
            color: #fff;
            font-weight: 600;
            border-color: var(--kaiyun-primary);
        }
        .kaiyun-channel-link.active:hover {
            background: var(--kaiyun-primary-dark);
            color: #fff;
        }

        .kaiyun-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--kaiyun-dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-hamburger:hover {
            background: var(--kaiyun-bg);
        }

        @media (max-width: 992px) {
            .kaiyun-brand-bar {
                padding: 10px 0;
            }
            .kaiyun-search-box {
                min-width: 150px;
                flex: 1;
                max-width: 260px;
            }
        }
        @media (max-width: 768px) {
            .kaiyun-hamburger {
                display: block;
            }
            .kaiyun-search-box {
                display: none;
            }
            .kaiyun-brand-right .kaiyun-login-btn,
            .kaiyun-brand-right .kaiyun-primary-btn-sm {
                display: none;
            }
            .kaiyun-channel-row {
                padding: 2px 0 6px;
            }
            .kaiyun-channel-link {
                padding: 6px 12px;
                font-size: 13px;
            }
        }
        @media (max-width: 576px) {
            .kaiyun-logo {
                font-size: 18px;
            }
            .kaiyun-logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
                border-radius: 8px;
            }
        }

        /* ===== Buttons ===== */
        .kaiyun-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            font-family: var(--kaiyun-font);
            border: none;
            cursor: pointer;
            transition: var(--kaiyun-transition);
            text-align: center;
            white-space: nowrap;
        }
        .kaiyun-btn-primary {
            background: var(--kaiyun-primary);
            color: #fff;
            border: 2px solid var(--kaiyun-primary);
        }
        .kaiyun-btn-primary:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(40, 184, 166, 0.35);
        }
        .kaiyun-btn-outline {
            background: transparent;
            color: var(--kaiyun-primary);
            border: 2px solid var(--kaiyun-primary);
        }
        .kaiyun-btn-outline:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary);
            transform: translateY(-2px);
        }
        .kaiyun-btn-light {
            background: #fff;
            color: var(--kaiyun-dark);
            border: 2px solid #fff;
        }
        .kaiyun-btn-light:hover {
            background: var(--kaiyun-bg);
            border-color: var(--kaiyun-bg);
            color: var(--kaiyun-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
        }
        .kaiyun-btn-lg {
            padding: 15px 36px;
            font-size: 16px;
        }
        .kaiyun-btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* ===== Section Base ===== */
        .kaiyun-section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .kaiyun-section {
                padding: 48px 0;
            }
        }
        .kaiyun-section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .kaiyun-section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .kaiyun-section-desc {
            font-size: 15px;
            color: var(--kaiyun-text-muted);
            line-height: 1.9;
            max-width: 680px;
            margin-bottom: 32px;
        }

        /* ===== Hero ===== */
        .kaiyun-hero {
            position: relative;
            background: var(--kaiyun-dark);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 600px;
            display: flex;
            align-items: center;
            padding: 80px 0;
            isolation: isolate;
            overflow: hidden;
        }
        .kaiyun-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(21, 24, 28, 0.85) 0%, rgba(27, 31, 36, 0.72) 40%, rgba(21, 24, 28, 0.88) 100%);
            z-index: -1;
        }
        .kaiyun-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(40, 184, 166, 0.18) 0%, transparent 70%);
            z-index: -1;
            pointer-events: none;
        }
        .kaiyun-hero-content {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .kaiyun-hero-left .kaiyun-hero-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 700;
            color: var(--kaiyun-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .kaiyun-hero-left h1 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 18px;
            line-height: 1.3;
            letter-spacing: -0.5px;
        }
        .kaiyun-hero-left h1 span {
            color: var(--kaiyun-primary);
        }
        .kaiyun-hero-sub {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.9;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .kaiyun-hero-cta {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .kaiyun-hero-right {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .kaiyun-hero-stat {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--kaiyun-radius);
            padding: 22px 20px;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-hero-stat:hover {
            background: rgba(255, 255, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.28);
            transform: translateY(-3px);
        }
        .kaiyun-hero-stat .stat-value {
            font-size: 32px;
            font-weight: 800;
            color: var(--kaiyun-primary);
            font-family: var(--kaiyun-number-font);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .kaiyun-hero-stat .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.5;
        }
        .kaiyun-hero-stat .stat-trend {
            display: inline-flex;
            align-items: center;
            gap: 3px;
            font-size: 12px;
            color: var(--kaiyun-secondary);
            margin-top: 4px;
            font-weight: 600;
        }
        @media (max-width: 992px) {
            .kaiyun-hero {
                min-height: auto;
                padding: 56px 0;
            }
            .kaiyun-hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .kaiyun-hero-left h1 {
                font-size: 30px;
            }
            .kaiyun-hero-right {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 576px) {
            .kaiyun-hero-left h1 {
                font-size: 24px;
            }
            .kaiyun-hero-right {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .kaiyun-hero-stat .stat-value {
                font-size: 26px;
            }
            .kaiyun-hero-cta .kaiyun-btn {
                width: 100%;
            }
        }

        /* ===== Pain Points ===== */
        .kaiyun-pain-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .kaiyun-pain-card {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius);
            padding: 28px 22px;
            transition: var(--kaiyun-transition);
            position: relative;
        }
        .kaiyun-pain-card:hover {
            border-color: var(--kaiyun-border);
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-3px);
        }
        .kaiyun-pain-card .pain-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #F0F2F3;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--kaiyun-text-muted);
            margin-bottom: 14px;
        }
        .kaiyun-pain-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }
        .kaiyun-pain-card p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.75;
            margin-bottom: 0;
        }
        @media (max-width: 992px) {
            .kaiyun-pain-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .kaiyun-pain-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Service Matrix ===== */
        .kaiyun-service-matrix {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 20px;
        }
        .kaiyun-service-card {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius-lg);
            padding: 28px 24px;
            transition: var(--kaiyun-transition);
            position: relative;
            overflow: hidden;
        }
        .kaiyun-service-card:hover {
            border-color: var(--kaiyun-border);
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-3px);
        }
        .kaiyun-service-card.featured {
            grid-column: span 1;
            grid-row: span 2;
            background: var(--kaiyun-dark);
            color: #fff;
            border-color: var(--kaiyun-dark);
            padding: 36px 28px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .kaiyun-service-card.featured .service-icon {
            background: rgba(40, 184, 166, 0.22);
            color: var(--kaiyun-primary);
        }
        .kaiyun-service-card.featured h3 {
            color: #fff;
            font-size: 22px;
        }
        .kaiyun-service-card.featured p {
            color: rgba(255, 255, 255, 0.75);
        }
        .kaiyun-service-card.featured .kaiyun-btn-outline {
            color: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
        }
        .kaiyun-service-card.featured .kaiyun-btn-outline:hover {
            background: rgba(40, 184, 166, 0.2);
        }
        .kaiyun-service-card .service-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--kaiyun-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--kaiyun-primary);
            margin-bottom: 16px;
        }
        .kaiyun-service-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 10px;
        }
        .kaiyun-service-card p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .kaiyun-service-card .service-cover {
            border-radius: var(--kaiyun-radius-sm);
            margin-bottom: 16px;
            aspect-ratio: 16/9;
            object-fit: cover;
            width: 100%;
        }
        .kaiyun-service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .kaiyun-service-link i {
            transition: var(--kaiyun-transition);
        }
        .kaiyun-service-link:hover i {
            transform: translateX(4px);
        }
        @media (max-width: 992px) {
            .kaiyun-service-matrix {
                grid-template-columns: 1fr 1fr;
            }
            .kaiyun-service-card.featured {
                grid-column: span 2;
                grid-row: auto;
            }
        }
        @media (max-width: 576px) {
            .kaiyun-service-matrix {
                grid-template-columns: 1fr;
            }
            .kaiyun-service-card.featured {
                grid-column: span 1;
            }
        }

        /* ===== Steps ===== */
        .kaiyun-steps-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }
        .kaiyun-steps-row::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--kaiyun-primary) 0%, var(--kaiyun-secondary) 50%, var(--kaiyun-coral) 100%);
            opacity: 0.4;
            z-index: 0;
        }
        .kaiyun-step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 12px;
        }
        .kaiyun-step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--kaiyun-card);
            border: 3px solid var(--kaiyun-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            color: var(--kaiyun-primary);
            margin: 0 auto 16px;
            font-family: var(--kaiyun-number-font);
            transition: var(--kaiyun-transition);
        }
        .kaiyun-step-item:hover .kaiyun-step-num {
            background: var(--kaiyun-primary);
            color: #fff;
            transform: scale(1.08);
            box-shadow: 0 8px 24px rgba(40, 184, 166, 0.35);
        }
        .kaiyun-step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }
        .kaiyun-step-item p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.75;
            max-width: 280px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .kaiyun-steps-row::before {
                display: none;
            }
            .kaiyun-steps-row {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== Comparison ===== */
        .kaiyun-comparison-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .kaiyun-compare-panel {
            border-radius: var(--kaiyun-radius-lg);
            padding: 32px 28px;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-compare-panel.before {
            background: #F0F2F3;
            border: 1px solid var(--kaiyun-border);
        }
        .kaiyun-compare-panel.after {
            background: var(--kaiyun-dark);
            border: 1px solid var(--kaiyun-dark);
            color: #fff;
        }
        .kaiyun-compare-panel h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .kaiyun-compare-panel.before h3 {
            color: var(--kaiyun-text-muted);
        }
        .kaiyun-compare-panel.after h3 {
            color: var(--kaiyun-primary);
        }
        .kaiyun-compare-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .kaiyun-compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 12px 0;
            font-size: 15px;
            line-height: 1.7;
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
        }
        .kaiyun-compare-panel.after .kaiyun-compare-list li {
            border-bottom-color: rgba(255, 255, 255, 0.1);
        }
        .kaiyun-compare-list li:last-child {
            border-bottom: none;
        }
        .kaiyun-compare-list li i {
            margin-top: 4px;
            flex-shrink: 0;
        }
        .kaiyun-compare-panel.before .kaiyun-compare-list li i {
            color: var(--kaiyun-coral);
        }
        .kaiyun-compare-panel.after .kaiyun-compare-list li i {
            color: var(--kaiyun-primary);
        }
        .kaiyun-compare-panel.before .kaiyun-compare-list li {
            color: var(--kaiyun-text-muted);
        }
        .kaiyun-compare-panel.after .kaiyun-compare-list li {
            color: rgba(255, 255, 255, 0.85);
        }
        @media (max-width: 768px) {
            .kaiyun-comparison-wrap {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Pricing ===== */
        .kaiyun-pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .kaiyun-price-card {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: var(--kaiyun-transition);
            position: relative;
        }
        .kaiyun-price-card:hover {
            border-color: var(--kaiyun-primary);
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
        }
        .kaiyun-price-card.featured-price {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 12px 32px rgba(40, 184, 166, 0.18);
        }
        .kaiyun-price-card .price-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--kaiyun-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }
        .kaiyun-price-card .price-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }
        .kaiyun-price-card .price-amount {
            font-size: 40px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            font-family: var(--kaiyun-number-font);
            font-variant-numeric: tabular-nums;
            margin-bottom: 4px;
        }
        .kaiyun-price-card .price-amount span {
            font-size: 16px;
            font-weight: 500;
            color: var(--kaiyun-text-muted);
        }
        .kaiyun-price-card .price-desc {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            margin-bottom: 20px;
            line-height: 1.7;
        }
        .kaiyun-price-features {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            text-align: left;
        }
        .kaiyun-price-features li {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--kaiyun-text);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }
        .kaiyun-price-features li:last-child {
            border-bottom: none;
        }
        .kaiyun-price-features li i {
            color: var(--kaiyun-primary);
            font-size: 13px;
        }
        .kaiyun-price-card .kaiyun-btn {
            width: 100%;
        }
        @media (max-width: 992px) {
            .kaiyun-pricing-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin: 0 auto;
            }
        }

        /* ===== News ===== */
        .kaiyun-news-wrap {
            display: grid;
            grid-template-columns: 1.6fr 0.8fr;
            gap: 28px;
        }
        .kaiyun-news-list {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius-lg);
            padding: 28px 24px;
        }
        .kaiyun-news-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--kaiyun-border-light);
            transition: var(--kaiyun-transition);
            cursor: pointer;
        }
        .kaiyun-news-item:last-child {
            border-bottom: none;
        }
        .kaiyun-news-item:hover .news-title {
            color: var(--kaiyun-primary);
        }
        .kaiyun-news-date {
            flex-shrink: 0;
            width: 56px;
            text-align: center;
            background: var(--kaiyun-bg);
            border-radius: var(--kaiyun-radius-sm);
            padding: 8px 4px;
        }
        .kaiyun-news-date .news-day {
            font-size: 20px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            font-family: var(--kaiyun-number-font);
            line-height: 1.2;
        }
        .kaiyun-news-date .news-month {
            font-size: 12px;
            color: var(--kaiyun-text-muted);
        }
        .kaiyun-news-content {
            flex: 1;
        }
        .kaiyun-news-content .news-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 5px;
            transition: var(--kaiyun-transition);
            line-height: 1.5;
        }
        .kaiyun-news-content .news-summary {
            font-size: 13px;
            color: var(--kaiyun-text-muted);
            line-height: 1.7;
        }
        .kaiyun-news-sidebar {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius-lg);
            padding: 28px 20px;
            align-self: start;
        }
        .kaiyun-news-sidebar h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 16px;
        }
        .kaiyun-news-hot-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--kaiyun-border-light);
            font-size: 13px;
            color: var(--kaiyun-text);
            transition: var(--kaiyun-transition);
        }
        .kaiyun-news-hot-item:last-child {
            border-bottom: none;
        }
        .kaiyun-news-hot-item:hover {
            color: var(--kaiyun-primary);
        }
        .kaiyun-news-hot-item .hot-rank {
            width: 24px;
            height: 24px;
            border-radius: 6px;
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .kaiyun-news-wrap {
                grid-template-columns: 1fr;
            }
            .kaiyun-news-sidebar {
                order: -1;
            }
        }

        /* ===== Testimonials ===== */
        .kaiyun-testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .kaiyun-testimonial-card {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius);
            padding: 24px 20px;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-testimonial-card:hover {
            border-color: var(--kaiyun-border);
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-3px);
        }
        .kaiyun-testimonial-card .testimonial-stars {
            color: var(--kaiyun-secondary);
            font-size: 14px;
            margin-bottom: 10px;
        }
        .kaiyun-testimonial-card p {
            font-size: 14px;
            color: var(--kaiyun-text);
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .kaiyun-testimonial-card .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .kaiyun-testimonial-card .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            flex-shrink: 0;
        }
        .kaiyun-testimonial-card .author-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-dark);
        }
        .kaiyun-testimonial-card .author-role {
            font-size: 12px;
            color: var(--kaiyun-text-muted);
        }
        @media (max-width: 992px) {
            .kaiyun-testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .kaiyun-testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Partners ===== */
        .kaiyun-partner-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .kaiyun-partner-tag {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius);
            padding: 18px 16px;
            text-align: center;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-partner-tag:hover {
            border-color: var(--kaiyun-primary);
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-2px);
        }
        .kaiyun-partner-tag .partner-icon {
            font-size: 24px;
            color: var(--kaiyun-primary);
            margin-bottom: 8px;
        }
        .kaiyun-partner-tag .partner-name {
            font-size: 15px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 4px;
        }
        .kaiyun-partner-tag .partner-desc {
            font-size: 12px;
            color: var(--kaiyun-text-muted);
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .kaiyun-partner-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .kaiyun-partner-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Brand Intro ===== */
        .kaiyun-brand-intro {
            background: var(--kaiyun-dark);
            color: #fff;
            border-radius: var(--kaiyun-radius-lg);
            padding: 40px 32px;
        }
        .kaiyun-brand-intro h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .kaiyun-brand-intro h3 span {
            color: var(--kaiyun-primary);
        }
        .kaiyun-brand-intro p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .kaiyun-brand-intro p:last-child {
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .kaiyun-accordion .accordion-item {
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--kaiyun-card);
            box-shadow: none;
        }
        .kaiyun-accordion .accordion-button {
            font-size: 16px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            padding: 18px 20px;
            background: var(--kaiyun-card);
            border: none;
            box-shadow: none;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-accordion .accordion-button:not(.collapsed) {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            box-shadow: none;
        }
        .kaiyun-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--kaiyun-primary);
        }
        .kaiyun-accordion .accordion-button::after {
            background-size: 16px;
            transition: var(--kaiyun-transition);
            filter: invert(60%) sepia(50%) saturate(400%) hue-rotate(130deg);
        }
        .kaiyun-accordion .accordion-body {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.85;
            padding: 16px 20px 20px;
        }

        /* ===== CTA Banner ===== */
        .kaiyun-cta-banner {
            background: linear-gradient(135deg, var(--kaiyun-primary) 0%, #1F9E8F 50%, #188E80 100%);
            border-radius: var(--kaiyun-radius-lg);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }
        .kaiyun-cta-banner::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -15%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .kaiyun-cta-banner .cta-banner-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .kaiyun-cta-banner .cta-banner-text p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 0;
        }
        .kaiyun-countdown {
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .kaiyun-countdown-item {
            background: rgba(255, 255, 255, 0.18);
            border-radius: var(--kaiyun-radius-sm);
            padding: 10px 16px;
            text-align: center;
            min-width: 64px;
        }
        .kaiyun-countdown-item .count-num {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            font-family: var(--kaiyun-number-font);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }
        .kaiyun-countdown-item .count-label {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 768px) {
            .kaiyun-cta-banner {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
            }
            .kaiyun-countdown {
                flex-wrap: wrap;
                justify-content: center;
            }
        }

        /* ===== Form ===== */
        .kaiyun-form-wrap {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 32px;
            align-items: start;
        }
        .kaiyun-form-info {
            padding-top: 20px;
        }
        .kaiyun-form-info h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 12px;
        }
        .kaiyun-form-info p {
            font-size: 15px;
            color: var(--kaiyun-text-muted);
            line-height: 1.85;
            margin-bottom: 20px;
        }
        .kaiyun-form-trust {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .kaiyun-form-trust li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--kaiyun-text);
        }
        .kaiyun-form-trust li i {
            color: var(--kaiyun-primary);
        }
        .kaiyun-form-card {
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius-lg);
            padding: 32px 28px;
            box-shadow: var(--kaiyun-shadow);
        }
        .kaiyun-form-card .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-dark);
            margin-bottom: 6px;
        }
        .kaiyun-form-card .form-control,
        .kaiyun-form-card .form-select {
            border: 1px solid var(--kaiyun-border);
            border-radius: var(--kaiyun-radius-sm);
            padding: 11px 14px;
            font-size: 14px;
            color: var(--kaiyun-text);
            font-family: var(--kaiyun-font);
            transition: var(--kaiyun-transition);
            background-color: #fff;
        }
        .kaiyun-form-card .form-control:focus,
        .kaiyun-form-card .form-select:focus {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
            outline: none;
        }
        .kaiyun-form-card .form-control::placeholder {
            color: var(--kaiyun-text-light);
        }
        .kaiyun-form-card textarea.form-control {
            min-height: 100px;
            resize: vertical;
        }
        .kaiyun-form-card .kaiyun-btn {
            width: 100%;
        }
        @media (max-width: 768px) {
            .kaiyun-form-wrap {
                grid-template-columns: 1fr;
            }
            .kaiyun-form-info {
                padding-top: 0;
            }
        }

        /* ===== Footer ===== */
        .kaiyun-footer {
            background: var(--kaiyun-darker);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .kaiyun-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .kaiyun-footer-brand .kaiyun-logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .kaiyun-footer-brand .kaiyun-logo:hover {
            color: #fff;
        }
        .kaiyun-footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 0;
        }
        .kaiyun-footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .kaiyun-footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .kaiyun-footer-col ul li {
            margin-bottom: 10px;
        }
        .kaiyun-footer-col ul li a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--kaiyun-transition);
        }
        .kaiyun-footer-col ul li a:hover {
            color: var(--kaiyun-primary);
        }
        .kaiyun-footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.8;
        }
        .kaiyun-footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--kaiyun-transition);
        }
        .kaiyun-footer-bottom a:hover {
            color: var(--kaiyun-primary);
        }
        @media (max-width: 768px) {
            .kaiyun-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kaiyun-footer-brand {
                grid-column: span 2;
            }
        }
        @media (max-width: 576px) {
            .kaiyun-footer-grid {
                grid-template-columns: 1fr;
            }
            .kaiyun-footer-brand {
                grid-column: span 1;
            }
        }

/* roulang page: category1 */
:root {
            --kaiyun-primary: #28B8A6;
            --kaiyun-primary-dark: #1F9E8F;
            --kaiyun-primary-light: #E8F7F5;
            --kaiyun-secondary: #D9A86C;
            --kaiyun-coral: #E38B6D;
            --kaiyun-dark: #1B1F24;
            --kaiyun-darker: #15181C;
            --kaiyun-bg: #F5F7F6;
            --kaiyun-card: #FFFFFF;
            --kaiyun-text: #2A3038;
            --kaiyun-text-muted: #6B7480;
            --kaiyun-text-light: #A8B0B8;
            --kaiyun-border: #D9DEE3;
            --kaiyun-border-light: #E8ECEF;
            --kaiyun-radius-sm: 8px;
            --kaiyun-radius: 12px;
            --kaiyun-radius-lg: 16px;
            --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
            --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
            --kaiyun-transition: all 0.2s ease;
            --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kaiyun-font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kaiyun-text);
            background-color: var(--kaiyun-bg);
            overflow-x: hidden;
        }

        a {
            color: var(--kaiyun-primary);
            text-decoration: none;
            transition: var(--kaiyun-transition);
        }

        a:hover {
            color: var(--kaiyun-primary-dark);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(40, 184, 166, 0.4);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .kaiyun-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--kaiyun-card);
            box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }

        .kaiyun-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .kaiyun-logo:hover {
            color: var(--kaiyun-dark);
        }

        .kaiyun-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-brand-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .kaiyun-search-box {
            display: flex;
            align-items: center;
            background: var(--kaiyun-bg);
            border: 1px solid var(--kaiyun-border);
            border-radius: 999px;
            padding: 6px 16px;
            gap: 8px;
            min-width: 220px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-search-box:focus-within {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        }

        .kaiyun-search-box i {
            color: var(--kaiyun-text-muted);
            font-size: 14px;
        }

        .kaiyun-search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--kaiyun-text);
            width: 100%;
            font-family: var(--kaiyun-font);
        }

        .kaiyun-search-box input::placeholder {
            color: var(--kaiyun-text-light);
        }

        .kaiyun-login-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            background: transparent;
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }

        .kaiyun-login-btn:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-primary-btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }

        .kaiyun-primary-btn-sm:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
        }

        .kaiyun-channel-row {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            border-top: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-channel-row::-webkit-scrollbar {
            display: none;
        }

        .kaiyun-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-text-muted);
            background: transparent;
            white-space: nowrap;
            transition: var(--kaiyun-transition);
            flex-shrink: 0;
        }

        .kaiyun-channel-link:hover {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-channel-link.active {
            color: #fff;
            background: var(--kaiyun-primary);
        }

        .kaiyun-channel-link.active i {
            color: #fff;
        }

        .kaiyun-channel-link i {
            font-size: 14px;
        }

        /* ===== Hero Banner ===== */
        .kaiyun-page-hero {
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 80px 0 70px;
            margin-bottom: 48px;
            border-radius: 0 0 var(--kaiyun-radius-lg) var(--kaiyun-radius-lg);
            overflow: hidden;
        }

        .kaiyun-page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 31, 36, 0.78) 0%, rgba(27, 31, 36, 0.55) 55%, rgba(40, 184, 166, 0.45) 100%);
            z-index: 1;
        }

        .kaiyun-page-hero .container {
            position: relative;
            z-index: 2;
        }

        .kaiyun-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(8px);
            border-radius: 999px;
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 18px;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .kaiyun-hero-badge i {
            color: var(--kaiyun-secondary);
        }

        .kaiyun-page-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 700px;
        }

        .kaiyun-page-hero .hero-subtitle {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.88);
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .kaiyun-hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .kaiyun-hero-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
        }

        .kaiyun-hero-btn-primary:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--kaiyun-shadow-hover);
        }

        .kaiyun-hero-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.6);
            transition: var(--kaiyun-transition);
        }

        .kaiyun-hero-btn-outline:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }

        .kaiyun-hero-meta {
            display: flex;
            gap: 24px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .kaiyun-hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
        }

        .kaiyun-hero-meta-item i {
            color: var(--kaiyun-secondary);
        }

        /* ===== Content Layout ===== */
        .kaiyun-content-section {
            padding: 24px 0 72px;
        }

        .kaiyun-filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding: 16px 0;
            border-bottom: 1px solid var(--kaiyun-border-light);
            margin-bottom: 28px;
        }

        .kaiyun-filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .kaiyun-filter-tag {
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            color: var(--kaiyun-text-muted);
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border);
            transition: var(--kaiyun-transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .kaiyun-filter-tag:hover {
            border-color: var(--kaiyun-primary);
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-filter-tag.active {
            background: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
            color: #fff;
        }

        .kaiyun-sort-select {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border-radius: 999px;
            border: 1px solid var(--kaiyun-border);
            background: var(--kaiyun-card);
            font-size: 13px;
            font-weight: 600;
            color: var(--kaiyun-text);
            cursor: pointer;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-sort-select:hover {
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-sort-select select {
            border: none;
            background: transparent;
            outline: none;
            font-size: 13px;
            font-weight: 600;
            color: var(--kaiyun-text);
            cursor: pointer;
            font-family: var(--kaiyun-font);
        }

        .kaiyun-news-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            overflow: hidden;
            box-shadow: var(--kaiyun-shadow);
            margin-bottom: 28px;
            transition: var(--kaiyun-transition);
            border: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-news-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
        }

        .kaiyun-news-card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }

        .kaiyun-news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .kaiyun-news-card:hover .kaiyun-news-card-img img {
            transform: scale(1.03);
        }

        .kaiyun-news-card-body {
            padding: 20px 24px 22px;
        }

        .kaiyun-news-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 999px;
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .kaiyun-news-card h3 {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            color: var(--kaiyun-dark);
        }

        .kaiyun-news-card h3 a {
            color: var(--kaiyun-dark);
        }

        .kaiyun-news-card h3 a:hover {
            color: var(--kaiyun-primary);
        }

        .kaiyun-news-card .news-excerpt {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.75;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .kaiyun-news-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: 13px;
            color: var(--kaiyun-text-light);
            padding-top: 12px;
            border-top: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-news-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .kaiyun-news-meta i {
            font-size: 13px;
            color: var(--kaiyun-text-light);
        }

        /* ===== Sidebar ===== */
        .kaiyun-sidebar {
            position: sticky;
            top: 140px;
        }

        .kaiyun-sidebar-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            padding: 24px;
            box-shadow: var(--kaiyun-shadow);
            border: 1px solid var(--kaiyun-border-light);
            margin-bottom: 24px;
        }

        .kaiyun-sidebar-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--kaiyun-primary-light);
            position: relative;
        }

        .kaiyun-sidebar-card h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 48px;
            height: 2px;
            background: var(--kaiyun-primary);
        }

        .kaiyun-hot-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .kaiyun-hot-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--kaiyun-text-muted);
            background: var(--kaiyun-bg);
            border: 1px solid var(--kaiyun-border-light);
            transition: var(--kaiyun-transition);
        }

        .kaiyun-hot-tag:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-topic-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kaiyun-topic-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-topic-list li:last-child {
            border-bottom: none;
        }

        .kaiyun-topic-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: var(--kaiyun-text);
            font-size: 14px;
            font-weight: 500;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-topic-list a:hover {
            color: var(--kaiyun-primary);
        }

        .kaiyun-topic-list .topic-count {
            font-size: 12px;
            color: var(--kaiyun-text-light);
            background: var(--kaiyun-bg);
            padding: 2px 10px;
            border-radius: 999px;
        }

        /* ===== Pagination ===== */
        .kaiyun-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 32px 0 8px;
        }

        .kaiyun-page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-text);
            background: var(--kaiyun-card);
            border: 1px solid var(--kaiyun-border);
            transition: var(--kaiyun-transition);
        }

        .kaiyun-page-link:hover {
            border-color: var(--kaiyun-primary);
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-page-link.active {
            background: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
            color: #fff;
        }

        .kaiyun-page-link.disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        /* ===== FAQ ===== */
        .kaiyun-faq-section {
            padding: 64px 0;
            background: var(--kaiyun-card);
            border-top: 1px solid var(--kaiyun-border-light);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-faq-section .section-title {
            text-align: center;
            font-size: 28px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            margin-bottom: 12px;
        }

        .kaiyun-faq-section .section-subtitle {
            text-align: center;
            font-size: 15px;
            color: var(--kaiyun-text-muted);
            margin-bottom: 40px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .kaiyun-accordion-item {
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius);
            margin-bottom: 12px;
            background: var(--kaiyun-bg);
            overflow: hidden;
        }

        .kaiyun-accordion-header {
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            transition: var(--kaiyun-transition);
            font-weight: 700;
            font-size: 15px;
            color: var(--kaiyun-dark);
            background: var(--kaiyun-card);
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }

        .kaiyun-accordion-header:hover {
            color: var(--kaiyun-primary);
        }

        .kaiyun-accordion-header i {
            font-size: 16px;
            color: var(--kaiyun-primary);
            transition: transform 0.2s ease;
        }

        .kaiyun-accordion-header[aria-expanded="true"] i {
            transform: rotate(45deg);
        }

        .kaiyun-accordion-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.8;
            background: var(--kaiyun-card);
        }

        .kaiyun-accordion-body.show {
            padding: 0 20px 18px;
            max-height: 400px;
        }

        /* ===== CTA Section ===== */
        .kaiyun-cta-section {
            padding: 64px 0 72px;
            background: var(--kaiyun-bg);
        }

        .kaiyun-cta-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            padding: 48px;
            box-shadow: var(--kaiyun-shadow);
            border: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-cta-info h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .kaiyun-cta-info p {
            font-size: 15px;
            color: var(--kaiyun-text-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .kaiyun-cta-points {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .kaiyun-cta-points li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--kaiyun-text);
        }

        .kaiyun-cta-points li i {
            color: var(--kaiyun-primary);
            font-size: 14px;
        }

        .kaiyun-form-card {
            background: var(--kaiyun-bg);
            border-radius: var(--kaiyun-radius);
            padding: 28px;
            border: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-form-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 20px;
        }

        .kaiyun-form-group {
            margin-bottom: 16px;
        }

        .kaiyun-form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--kaiyun-text);
            margin-bottom: 6px;
        }

        .kaiyun-form-group input,
        .kaiyun-form-group select,
        .kaiyun-form-group textarea {
            width: 100%;
            padding: 10px 16px;
            border-radius: 10px;
            border: 1px solid var(--kaiyun-border);
            background: var(--kaiyun-card);
            font-size: 14px;
            color: var(--kaiyun-text);
            transition: var(--kaiyun-transition);
            font-family: var(--kaiyun-font);
        }

        .kaiyun-form-group input:focus,
        .kaiyun-form-group select:focus,
        .kaiyun-form-group textarea:focus {
            outline: none;
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        }

        .kaiyun-form-group textarea {
            resize: vertical;
            min-height: 90px;
        }

        .kaiyun-submit-btn {
            width: 100%;
            padding: 12px 24px;
            border-radius: 999px;
            background: var(--kaiyun-primary);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            cursor: pointer;
            font-family: var(--kaiyun-font);
        }

        .kaiyun-submit-btn:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--kaiyun-shadow-hover);
        }

        /* ===== Footer ===== */
        .kaiyun-footer {
            background: var(--kaiyun-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 24px;
            margin-top: 0;
        }

        .kaiyun-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .kaiyun-footer-brand .kaiyun-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .kaiyun-footer-brand .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.65);
            max-width: 300px;
        }

        .kaiyun-footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .kaiyun-footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kaiyun-footer-col ul li {
            margin-bottom: 10px;
        }

        .kaiyun-footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-footer-col ul li a:hover {
            color: var(--kaiyun-primary);
            padding-left: 4px;
        }

        .kaiyun-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .kaiyun-footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .kaiyun-footer-bottom a:hover {
            color: var(--kaiyun-primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .kaiyun-cta-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 32px;
            }

            .kaiyun-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .kaiyun-page-hero h1 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            .kaiyun-brand-bar {
                padding: 12px 0;
            }

            .kaiyun-search-box {
                min-width: 160px;
                flex: 1;
            }

            .kaiyun-channel-row {
                padding: 8px 0;
            }

            .kaiyun-page-hero {
                padding: 56px 0 48px;
                margin-bottom: 32px;
            }

            .kaiyun-page-hero h1 {
                font-size: 26px;
            }

            .kaiyun-page-hero .hero-subtitle {
                font-size: 14px;
            }

            .kaiyun-content-section {
                padding: 16px 0 48px;
            }

            .kaiyun-news-card h3 {
                font-size: 17px;
            }

            .kaiyun-filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .kaiyun-sidebar {
                position: static;
                margin-top: 12px;
            }

            .kaiyun-cta-wrapper {
                padding: 24px;
                gap: 24px;
            }

            .kaiyun-cta-info h2 {
                font-size: 22px;
            }

            .kaiyun-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .kaiyun-footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        @media (max-width: 576px) {
            .kaiyun-brand-bar {
                flex-wrap: nowrap;
                gap: 12px;
            }

            .kaiyun-search-box {
                display: none;
            }

            .kaiyun-login-btn {
                display: none;
            }

            .kaiyun-primary-btn-sm {
                padding: 8px 16px;
                font-size: 13px;
            }

            .kaiyun-channel-link {
                padding: 7px 14px;
                font-size: 13px;
            }

            .kaiyun-page-hero h1 {
                font-size: 24px;
            }

            .kaiyun-news-card-body {
                padding: 16px 18px 18px;
            }

            .kaiyun-news-meta {
                flex-wrap: wrap;
                gap: 10px;
            }

            .kaiyun-pagination {
                gap: 5px;
                flex-wrap: wrap;
            }
        }

/* roulang page: category2 */
:root {
 --kaiyun-primary: #28B8A6;
 --kaiyun-primary-dark: #1F9E8F;
 --kaiyun-primary-light: #E8F7F5;
 --kaiyun-secondary: #D9A86C;
 --kaiyun-coral: #E38B6D;
 --kaiyun-dark: #1B1F24;
 --kaiyun-darker: #15181C;
 --kaiyun-bg: #F5F7F6;
 --kaiyun-card: #FFFFFF;
 --kaiyun-text: #2A3038;
 --kaiyun-text-muted: #6B7480;
 --kaiyun-text-light: #A8B0B8;
 --kaiyun-border: #D9DEE3;
 --kaiyun-border-light: #E8ECEF;
 --kaiyun-radius-sm: 8px;
 --kaiyun-radius: 12px;
 --kaiyun-radius-lg: 16px;
 --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
 --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
 --kaiyun-transition: all 0.2s ease;
 --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
 --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--kaiyun-font); font-size: 16px; line-height: 1.8; color: var(--kaiyun-text); background-color: var(--kaiyun-bg); overflow-x: hidden; }
a { color: var(--kaiyun-primary); text-decoration: none; transition: var(--kaiyun-transition); }
a:hover { color: var(--kaiyun-primary-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible { outline: 3px solid rgba(40, 184, 166, 0.4); outline-offset: 2px; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }
@media (max-width: 576px) {
 .container { padding-left: 16px; padding-right: 16px; }
}
/* Header / Nav */
.kaiyun-header { position: sticky; top: 0; z-index: 1050; background: var(--kaiyun-card); box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06); border-bottom: 1px solid var(--kaiyun-border-light); }
.kaiyun-brand-bar { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; gap: 20px; flex-wrap: wrap; }
.kaiyun-logo { display: flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 800; color: var(--kaiyun-dark); letter-spacing: 0.5px; white-space: nowrap; }
.kaiyun-logo:hover { color: var(--kaiyun-dark); }
.kaiyun-logo .logo-icon { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; background: var(--kaiyun-primary); color: #fff; border-radius: 10px; font-size: 20px; font-weight: 700; flex-shrink: 0; }
.kaiyun-logo span { color: var(--kaiyun-primary); }
.kaiyun-brand-right { display: flex; align-items: center; gap: 14px; }
.kaiyun-search-box { display: flex; align-items: center; background: var(--kaiyun-bg); border: 1px solid var(--kaiyun-border); border-radius: 999px; padding: 6px 16px; gap: 8px; min-width: 220px; transition: var(--kaiyun-transition); }
.kaiyun-search-box:focus-within { border-color: var(--kaiyun-primary); box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15); }
.kaiyun-search-box i { color: var(--kaiyun-text-muted); font-size: 14px; }
.kaiyun-search-box input { border: none; background: transparent; outline: none; font-size: 14px; color: var(--kaiyun-text); width: 100%; font-family: var(--kaiyun-font); }
.kaiyun-search-box input::placeholder { color: var(--kaiyun-text-light); }
.kaiyun-login-btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--kaiyun-primary); background: transparent; border: 1px solid var(--kaiyun-primary); transition: var(--kaiyun-transition); white-space: nowrap; }
.kaiyun-login-btn:hover { background: var(--kaiyun-primary-light); color: var(--kaiyun-primary-dark); border-color: var(--kaiyun-primary); }
.kaiyun-primary-btn-sm { display: inline-flex; align-items: center; gap: 6px; padding: 8px 20px; border-radius: 999px; font-size: 14px; font-weight: 700; color: #fff; background: var(--kaiyun-primary); border: 1px solid var(--kaiyun-primary); transition: var(--kaiyun-transition); white-space: nowrap; }
.kaiyun-primary-btn-sm:hover { background: var(--kaiyun-primary-dark); border-color: var(--kaiyun-primary-dark); color: #fff; transform: translateY(-2px); }
.kaiyun-search-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border: 1px solid var(--kaiyun-border); border-radius: 50%; background: #fff; color: var(--kaiyun-text-muted); font-size: 16px; cursor: pointer; transition: var(--kaiyun-transition); }
.kaiyun-search-toggle:hover { border-color: var(--kaiyun-primary); color: var(--kaiyun-primary); }
.kaiyun-channel-row { display: flex; align-items: center; gap: 4px; padding: 8px 0 12px; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.kaiyun-channel-row::-webkit-scrollbar { display: none; }
.kaiyun-channel-link { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--kaiyun-text-muted); white-space: nowrap; transition: var(--kaiyun-transition); }
.kaiyun-channel-link i { font-size: 13px; opacity: 0.8; }
.kaiyun-channel-link:hover { color: var(--kaiyun-primary); background: var(--kaiyun-primary-light); }
.kaiyun-channel-link.active { color: #fff; background: var(--kaiyun-primary); box-shadow: 0 4px 14px rgba(40, 184, 166, 0.3); }
.kaiyun-mobile-toggle { display: none; width: 40px; height: 40px; align-items: center; justify-content: center; border: 1px solid var(--kaiyun-border); border-radius: 10px; background: #fff; color: var(--kaiyun-text); font-size: 18px; cursor: pointer; transition: var(--kaiyun-transition); }
.kaiyun-mobile-toggle:hover { border-color: var(--kaiyun-primary); color: var(--kaiyun-primary); }
/* Breadcrumb */
.kaiyun-breadcrumb { padding: 18px 0 0; font-size: 13px; color: var(--kaiyun-text-muted); }
.kaiyun-breadcrumb a { color: var(--kaiyun-text-muted); }
.kaiyun-breadcrumb a:hover { color: var(--kaiyun-primary); }
.kaiyun-breadcrumb i { margin: 0 6px; font-size: 11px; color: var(--kaiyun-text-light); }
.kaiyun-breadcrumb .current { color: var(--kaiyun-primary); font-weight: 600; }
/* Category Hero */
.kaiyun-cat-hero { padding: 28px 0 44px; margin-top: 0; }
.kaiyun-cat-hero-banner { position: relative; border-radius: var(--kaiyun-radius-lg); overflow: hidden; min-height: 260px; background: var(--kaiyun-dark); display: flex; align-items: center; }
.kaiyun-cat-hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: 0.22; }
.kaiyun-cat-hero-overlay { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(21,24,28,0.92) 0%, rgba(21,24,28,0.6) 55%, rgba(21,24,28,0.3) 100%); }
.kaiyun-cat-hero-content { position: relative; z-index: 2; padding: 40px 36px; width: 100%; display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; align-items: center; }
.kaiyun-cat-hero-left { max-width: 620px; }
.kaiyun-cat-hero-left h1 { font-size: 32px; font-weight: 800; color: #fff; line-height: 1.35; margin-bottom: 14px; }
.kaiyun-cat-hero-left h1 span { color: var(--kaiyun-primary); }
.kaiyun-cat-hero-left p { color: rgba(255,255,255,0.82); font-size: 15px; line-height: 1.9; margin-bottom: 20px; max-width: 560px; }
.kaiyun-cat-hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.kaiyun-btn-light { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; border-radius: 999px; font-weight: 700; font-size: 15px; background: #fff; color: var(--kaiyun-dark); border: none; transition: var(--kaiyun-transition); }
.kaiyun-btn-light:hover { background: rgba(255,255,255,0.88); transform: translateY(-2px); }
.kaiyun-btn-outline-light { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; border-radius: 999px; font-weight: 700; font-size: 15px; background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.5); transition: var(--kaiyun-transition); }
.kaiyun-btn-outline-light:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; transform: translateY(-2px); }
.kaiyun-cat-hero-stats { display: flex; gap: 28px; flex-wrap: wrap; }
.kaiyun-hero-stat { text-align: right; min-width: 90px; }
.kaiyun-hero-stat .num { font-size: 26px; font-weight: 700; color: #fff; font-family: var(--kaiyun-number-font); line-height: 1.2; }
.kaiyun-hero-stat .num i { font-size: 14px; color: var(--kaiyun-secondary); margin-left: 3px; }
.kaiyun-hero-stat .label { font-size: 12px; color: rgba(255,255,255,0.65); margin-top: 4px; }
/* Section base */
.kaiyun-section { padding: 64px 0; }
.kaiyun-section-tight { padding: 52px 0; }
.kaiyun-section-title { font-size: 26px; font-weight: 800; color: var(--kaiyun-dark); margin-bottom: 10px; }
.kaiyun-section-subtitle { font-size: 15px; color: var(--kaiyun-text-muted); line-height: 1.8; margin-bottom: 32px; max-width: 680px; }
.kaiyun-section-head { margin-bottom: 36px; display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; }
.kaiyun-section-head-left { max-width: 720px; }
.kaiyun-section-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 700; color: var(--kaiyun-primary); background: var(--kaiyun-primary-light); padding: 4px 14px; border-radius: 999px; margin-bottom: 12px; }
/* Buttons */
.kaiyun-btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 26px; border-radius: 999px; font-weight: 700; font-size: 15px; transition: var(--kaiyun-transition); border: none; cursor: pointer; }
.kaiyun-btn-primary { background: var(--kaiyun-primary); color: #fff; }
.kaiyun-btn-primary:hover { background: var(--kaiyun-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(40, 184, 166, 0.3); }
.kaiyun-btn-outline { background: transparent; color: var(--kaiyun-primary); border: 1px solid var(--kaiyun-primary); }
.kaiyun-btn-outline:hover { background: var(--kaiyun-primary-light); color: var(--kaiyun-primary-dark); transform: translateY(-2px); }
/* Capability cards */
.kaiyun-cap-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 22px; }
.kaiyun-cap-card { grid-column: span 6; background: var(--kaiyun-card); border-radius: var(--kaiyun-radius-lg); padding: 26px 28px; border: 1px solid var(--kaiyun-border-light); box-shadow: var(--kaiyun-shadow); transition: var(--kaiyun-transition); position: relative; overflow: hidden; }
.kaiyun-cap-card:hover { box-shadow: var(--kaiyun-shadow-hover); transform: translateY(-3px); border-color: rgba(40,184,166,0.35); }
.kaiyun-cap-card.wide { grid-column: span 12; display: flex; flex-wrap: wrap; gap: 26px; align-items: center; background: linear-gradient(120deg, #fff 0%, var(--kaiyun-primary-light) 100%); }
.kaiyun-cap-icon { width: 56px; height: 56px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 24px; color: #fff; background: var(--kaiyun-primary); margin-bottom: 16px; flex-shrink: 0; }
.kaiyun-cap-card.wide .kaiyun-cap-icon { background: var(--kaiyun-dark); margin-bottom: 0; }
.kaiyun-cap-card h3 { font-size: 19px; font-weight: 700; color: var(--kaiyun-dark); margin-bottom: 8px; }
.kaiyun-cap-card p { font-size: 14px; color: var(--kaiyun-text-muted); line-height: 1.8; margin-bottom: 16px; }
.kaiyun-cap-card .kaiyun-cap-link { font-size: 14px; font-weight: 700; color: var(--kaiyun-primary); display: inline-flex; align-items: center; gap: 5px; }
.kaiyun-cap-card .kaiyun-cap-link:hover { color: var(--kaiyun-primary-dark); gap: 8px; }
.kaiyun-cap-card.wide .kaiyun-cap-body { flex: 1; min-width: 260px; }
.kaiyun-cap-card.wide p { margin-bottom: 0; }
/* Content cards */
.kaiyun-list-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.kaiyun-content-card { background: var(--kaiyun-card); border-radius: var(--kaiyun-radius-lg); overflow: hidden; border: 1px solid var(--kaiyun-border-light); box-shadow: var(--kaiyun-shadow); transition: var(--kaiyun-transition); display: flex; flex-direction: column; }
.kaiyun-content-card:hover { box-shadow: var(--kaiyun-shadow-hover); transform: translateY(-4px); }
.kaiyun-content-card-img { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.kaiyun-content-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.kaiyun-content-card:hover .kaiyun-content-card-img img { transform: scale(1.04); }
.kaiyun-content-card-img .kaiyun-content-tag { position: absolute; left: 12px; top: 12px; background: rgba(21,24,28,0.82); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; backdrop-filter: blur(6px); }
.kaiyun-content-card-img .kaiyun-content-cat { position: absolute; right: 12px; top: 12px; background: var(--kaiyun-primary); color: #fff; font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.kaiyun-content-card-body { padding: 20px 22px 18px; flex: 1; display: flex; flex-direction: column; }
.kaiyun-content-card-body h3 { font-size: 17px; font-weight: 700; color: var(--kaiyun-dark); line-height: 1.5; margin-bottom: 8px; transition: var(--kaiyun-transition); }
.kaiyun-content-card:hover .kaiyun-content-card-body h3 { color: var(--kaiyun-primary-dark); }
.kaiyun-content-card-body .kaiyun-content-summary { font-size: 14px; color: var(--kaiyun-text-muted); line-height: 1.75; margin-bottom: 14px; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.kaiyun-content-meta { display: flex; align-items: center; gap: 16px; font-size: 12px; color: var(--kaiyun-text-light); border-top: 1px solid var(--kaiyun-border-light); padding-top: 12px; }
.kaiyun-content-meta span { display: inline-flex; align-items: center; gap: 4px; }
.kaiyun-content-card .kaiyun-content-link { font-size: 14px; font-weight: 700; color: var(--kaiyun-primary); display: inline-flex; align-items: center; gap: 5px; margin-top: 12px; }
.kaiyun-content-card .kaiyun-content-link:hover { color: var(--kaiyun-primary-dark); gap: 8px; }
/* Filter bar */
.kaiyun-filter-bar { background: var(--kaiyun-card); border: 1px solid var(--kaiyun-border-light); border-radius: var(--kaiyun-radius); padding: 16px 20px; margin-bottom: 28px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; }
.kaiyun-filter-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.kaiyun-filter-tag { padding: 6px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--kaiyun-text-muted); background: var(--kaiyun-bg); border: 1px solid transparent; transition: var(--kaiyun-transition); cursor: pointer; }
.kaiyun-filter-tag:hover { color: var(--kaiyun-primary); border-color: var(--kaiyun-primary); }
.kaiyun-filter-tag.active { background: var(--kaiyun-primary); color: #fff; }
.kaiyun-filter-sort { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--kaiyun-text-muted); }
.kaiyun-filter-sort select { border: 1px solid var(--kaiyun-border); border-radius: 8px; padding: 6px 14px; font-size: 13px; color: var(--kaiyun-text); background: #fff; cursor: pointer; font-family: var(--kaiyun-font); }
.kaiyun-filter-sort select:focus { border-color: var(--kaiyun-primary); box-shadow: 0 0 0 3px rgba(40,184,166,0.15); outline: none; }
/* Pagination */
.kaiyun-pagination { display: flex; justify-content: center; gap: 8px; margin-top: 36px; }
.kaiyun-page-btn { display: inline-flex; align-items: center; justify-content: center; min-width: 38px; height: 38px; padding: 0 12px; border-radius: 10px; font-size: 14px; font-weight: 600; color: var(--kaiyun-text-muted); background: var(--kaiyun-card); border: 1px solid var(--kaiyun-border); transition: var(--kaiyun-transition); }
.kaiyun-page-btn:hover { border-color: var(--kaiyun-primary); color: var(--kaiyun-primary); }
.kaiyun-page-btn.active { background: var(--kaiyun-primary); color: #fff; border-color: var(--kaiyun-primary); }
/* Process */
.kaiyun-process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.kaiyun-process-step { background: var(--kaiyun-card); border-radius: var(--kaiyun-radius-lg); padding: 26px 24px; border: 1px solid var(--kaiyun-border-light); box-shadow: var(--kaiyun-shadow); position: relative; transition: var(--kaiyun-transition); }
.kaiyun-process-step:hover { box-shadow: var(--kaiyun-shadow-hover); transform: translateY(-3px); }
.kaiyun-process-num { font-size: 38px; font-weight: 800; color: var(--kaiyun-primary-light); font-family: var(--kaiyun-number-font); line-height: 1; margin-bottom: 12px; -webkit-text-stroke: 1px var(--kaiyun-primary); }
.kaiyun-process-step h4 { font-size: 17px; font-weight: 700; color: var(--kaiyun-dark); margin-bottom: 8px; }
.kaiyun-process-step p { font-size: 14px; color: var(--kaiyun-text-muted); line-height: 1.75; margin-bottom: 0; }
/* FAQ */
.kaiyun-faq-wrap { max-width: 860px; margin: 0 auto; }
.kaiyun-accordion .accordion-item { border: 1px solid var(--kaiyun-border-light); border-radius: var(--kaiyun-radius) !important; margin-bottom: 12px; overflow: hidden; background: var(--kaiyun-card); }
.kaiyun-accordion .accordion-button { font-size: 15px; font-weight: 700; color: var(--kaiyun-dark); padding: 18px 22px; background: var(--kaiyun-card); border: none; box-shadow: none; }
.kaiyun-accordion .accordion-button:not(.collapsed) { color: var(--kaiyun-primary); background: var(--kaiyun-primary-light); }
.kaiyun-accordion .accordion-button:focus { box-shadow: none; border: none; outline: 3px solid rgba(40,184,166,0.4); outline-offset: -3px; }
.kaiyun-accordion .accordion-button::after { background-size: 14px; transition: transform 0.25s ease; }
.kaiyun-accordion .accordion-body { font-size: 14px; color: var(--kaiyun-text-muted); line-height: 1.85; padding: 16px 22px 20px; }
/* CTA / Form */
.kaiyun-cta-section { background: var(--kaiyun-dark); padding: 72px 0; position: relative; overflow: hidden; }
.kaiyun-cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.kaiyun-cta-left h3 { font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.kaiyun-cta-left h3 span { color: var(--kaiyun-primary); }
.kaiyun-cta-left p { color: rgba(255,255,255,0.78); font-size: 15px; line-height: 1.85; margin-bottom: 18px; }
.kaiyun-cta-points { list-style: none; padding: 0; margin: 0 0 22px; }
.kaiyun-cta-points li { color: rgba(255,255,255,0.8); font-size: 14px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.kaiyun-cta-points li i { color: var(--kaiyun-primary); font-size: 14px; }
.kaiyun-cta-note { font-size: 13px; color: rgba(255,255,255,0.55); }
.kaiyun-form-card { background: #fff; border-radius: var(--kaiyun-radius-lg); padding: 32px 30px; box-shadow: 0 16px 48px rgba(0,0,0,0.18); }
.kaiyun-form-card h4 { font-size: 20px; font-weight: 800; color: var(--kaiyun-dark); margin-bottom: 6px; }
.kaiyun-form-card .form-sub { font-size: 13px; color: var(--kaiyun-text-muted); margin-bottom: 22px; }
.kaiyun-form-control { border: 1px solid var(--kaiyun-border); border-radius: var(--kaiyun-radius-sm); padding: 10px 16px; font-size: 14px; color: var(--kaiyun-text); font-family: var(--kaiyun-font); transition: var(--kaiyun-transition); background: #fff; width: 100%; }
.kaiyun-form-control:focus { border-color: var(--kaiyun-primary); box-shadow: 0 0 0 3px rgba(40,184,166,0.15); outline: none; }
.kaiyun-form-control::placeholder { color: var(--kaiyun-text-light); }
.kaiyun-form-label { font-size: 13px; font-weight: 700; color: var(--kaiyun-dark); margin-bottom: 6px; display: block; }
.kaiyun-form-group { margin-bottom: 16px; }
.kaiyun-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.kaiyun-form-submit { width: 100%; padding: 12px 24px; border-radius: 999px; background: var(--kaiyun-primary); color: #fff; font-size: 16px; font-weight: 700; border: none; transition: var(--kaiyun-transition); cursor: pointer; font-family: var(--kaiyun-font); }
.kaiyun-form-submit:hover { background: var(--kaiyun-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(40,184,166,0.3); }
/* Feature band */
.kaiyun-feature-band { background: #fff; border-top: 1px solid var(--kaiyun-border-light); border-bottom: 1px solid var(--kaiyun-border-light); }
.kaiyun-feature-band-item { padding: 22px 28px; display: flex; align-items: flex-start; gap: 14px; border-right: 1px solid var(--kaiyun-border-light); }
.kaiyun-feature-band-item:last-child { border-right: none; }
.kaiyun-feature-band-item i { font-size: 22px; color: var(--kaiyun-primary); margin-top: 4px; }
.kaiyun-feature-band-item h5 { font-size: 15px; font-weight: 700; color: var(--kaiyun-dark); margin-bottom: 4px; }
.kaiyun-feature-band-item p { font-size: 13px; color: var(--kaiyun-text-muted); line-height: 1.6; margin-bottom: 0; }
/* Footer */
.kaiyun-footer { background: var(--kaiyun-darker); color: rgba(255,255,255,0.75); padding: 56px 0 0; }
.kaiyun-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.kaiyun-footer-brand .kaiyun-logo { color: #fff; margin-bottom: 14px; }
.kaiyun-footer-brand .kaiyun-logo:hover { color: #fff; }
.kaiyun-footer-brand .kaiyun-logo span { color: var(--kaiyun-primary); }
.kaiyun-footer-brand p { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,0.65); max-width: 320px; }
.kaiyun-footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.kaiyun-footer-col ul { list-style: none; padding: 0; margin: 0; }
.kaiyun-footer-col ul li { margin-bottom: 10px; }
.kaiyun-footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 14px; transition: var(--kaiyun-transition); }
.kaiyun-footer-col ul li a:hover { color: var(--kaiyun-primary); padding-left: 4px; }
.kaiyun-footer-bottom { padding: 20px 0; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; font-size: 13px; color: rgba(255,255,255,0.5); }
.kaiyun-footer-bottom a { color: rgba(255,255,255,0.5); }
.kaiyun-footer-bottom a:hover { color: var(--kaiyun-primary); }
/* Responsive */
@media (max-width: 992px) {
 .kaiyun-search-box { min-width: 160px; }
 .kaiyun-cap-card { grid-column: span 12; }
 .kaiyun-cap-card.wide { grid-column: span 12; }
 .kaiyun-list-grid { grid-template-columns: repeat(2, 1fr); }
 .kaiyun-process-grid { grid-template-columns: repeat(2, 1fr); }
 .kaiyun-cta-grid { grid-template-columns: 1fr; gap: 32px; }
 .kaiyun-cat-hero-content { flex-direction: column; align-items: flex-start; }
 .kaiyun-hero-stat { text-align: left; }
}
@media (max-width: 768px) {
 .kaiyun-search-box { display: none; }
 .kaiyun-search-toggle { display: flex; }
 .kaiyun-mobile-toggle { display: flex; }
 .kaiyun-brand-bar { padding: 10px 0; }
 .kaiyun-logo { font-size: 19px; }
 .kaiyun-logo .logo-icon { width: 34px; height: 34px; font-size: 17px; border-radius: 8px; }
 .kaiyun-login-btn, .kaiyun-primary-btn-sm { padding: 6px 14px; font-size: 13px; }
 .kaiyun-cat-hero-content { padding: 28px 20px; }
 .kaiyun-cat-hero-left h1 { font-size: 24px; }
 .kaiyun-cat-hero-left p { font-size: 14px; }
 .kaiyun-list-grid { grid-template-columns: 1fr; }
 .kaiyun-process-grid { grid-template-columns: 1fr; }
 .kaiyun-section { padding: 48px 0; }
 .kaiyun-section-tight { padding: 40px 0; }
 .kaiyun-section-title { font-size: 22px; }
 .kaiyun-form-row { grid-template-columns: 1fr; }
 .kaiyun-footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
 .kaiyun-footer-brand { grid-column: span 2; }
 .kaiyun-cta-section { padding: 48px 0; }
 .kaiyun-filter-bar { flex-direction: column; align-items: flex-start; }
 .kaiyun-pagination { flex-wrap: wrap; }
}
@media (max-width: 576px) {
 .kaiyun-cat-hero-banner { min-height: 220px; }
 .kaiyun-cat-hero-left h1 { font-size: 21px; }
 .kaiyun-cat-hero-stats { gap: 16px; }
 .kaiyun-hero-stat .num { font-size: 22px; }
 .kaiyun-btn { padding: 10px 20px; font-size: 14px; }
 .kaiyun-footer-grid { grid-template-columns: 1fr; }
 .kaiyun-footer-brand { grid-column: span 1; }
 .kaiyun-footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category3 */
:root {
            --kaiyun-primary: #28B8A6;
            --kaiyun-primary-dark: #1F9E8F;
            --kaiyun-primary-light: #E8F7F5;
            --kaiyun-secondary: #D9A86C;
            --kaiyun-coral: #E38B6D;
            --kaiyun-dark: #1B1F24;
            --kaiyun-darker: #15181C;
            --kaiyun-bg: #F5F7F6;
            --kaiyun-card: #FFFFFF;
            --kaiyun-text: #2A3038;
            --kaiyun-text-muted: #6B7480;
            --kaiyun-text-light: #A8B0B8;
            --kaiyun-border: #D9DEE3;
            --kaiyun-border-light: #E8ECEF;
            --kaiyun-radius-sm: 8px;
            --kaiyun-radius: 12px;
            --kaiyun-radius-lg: 16px;
            --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
            --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
            --kaiyun-transition: all 0.2s ease;
            --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kaiyun-font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kaiyun-text);
            background-color: var(--kaiyun-bg);
            overflow-x: hidden;
        }

        a {
            color: var(--kaiyun-primary);
            text-decoration: none;
            transition: var(--kaiyun-transition);
        }
        a:hover {
            color: var(--kaiyun-primary-dark);
        }
        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
            outline: 3px solid rgba(40, 184, 166, 0.4);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Nav ===== */
        .kaiyun-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--kaiyun-card);
            box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }
        .kaiyun-brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .kaiyun-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
            text-decoration: none;
        }
        .kaiyun-logo:hover {
            color: var(--kaiyun-dark);
        }
        .kaiyun-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }
        .kaiyun-brand-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .kaiyun-search-box {
            display: flex;
            align-items: center;
            background: var(--kaiyun-bg);
            border: 1px solid var(--kaiyun-border);
            border-radius: 999px;
            padding: 6px 16px;
            gap: 8px;
            min-width: 220px;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-search-box:focus-within {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        }
        .kaiyun-search-box i {
            color: var(--kaiyun-text-muted);
            font-size: 14px;
        }
        .kaiyun-search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--kaiyun-text);
            width: 100%;
            font-family: var(--kaiyun-font);
        }
        .kaiyun-search-box input::placeholder {
            color: var(--kaiyun-text-light);
        }
        .kaiyun-login-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            background: transparent;
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .kaiyun-login-btn:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary);
        }
        .kaiyun-primary-btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
            text-decoration: none;
        }
        .kaiyun-primary-btn-sm:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(40, 184, 166, 0.3);
        }
        .kaiyun-channel-row {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 0 0 12px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-wrap: nowrap;
        }
        .kaiyun-channel-row::-webkit-scrollbar {
            display: none;
        }
        .kaiyun-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-text-muted);
            white-space: nowrap;
            transition: var(--kaiyun-transition);
            text-decoration: none;
            border: 1px solid transparent;
        }
        .kaiyun-channel-link i {
            font-size: 13px;
        }
        .kaiyun-channel-link:hover {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
            border-color: rgba(40, 184, 166, 0.2);
        }
        .kaiyun-channel-link.active {
            color: #fff;
            background: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
            font-weight: 700;
        }
        .kaiyun-channel-link.active:hover {
            color: #fff;
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
        }

        /* ===== Hero 裂变邀请首屏 ===== */
        .kaiyun-category-hero {
            background: var(--kaiyun-dark);
            border-radius: var(--kaiyun-radius-lg);
            overflow: hidden;
            margin: 32px 0 48px;
            position: relative;
        }
        .kaiyun-category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27,31,36,0.92) 0%, rgba(27,31,36,0.78) 50%, rgba(40,184,166,0.45) 100%);
            z-index: 1;
        }
        .kaiyun-category-hero .container {
            position: relative;
            z-index: 2;
            padding: 64px 24px;
        }
        .kaiyun-category-hero .row {
            align-items: center;
        }
        .kaiyun-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(40, 184, 166, 0.2);
            color: #7DE3D5;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            border: 1px solid rgba(40, 184, 166, 0.4);
            margin-bottom: 20px;
        }
        .kaiyun-category-hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .kaiyun-category-hero h1 .highlight {
            color: var(--kaiyun-primary);
        }
        .kaiyun-category-hero .hero-desc {
            font-size: 17px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.78);
            max-width: 560px;
            margin-bottom: 24px;
        }
        .kaiyun-hero-invite-info {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }
        .kaiyun-hero-invite-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
            background: rgba(255, 255, 255, 0.07);
            padding: 8px 16px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .kaiyun-hero-invite-item i {
            color: var(--kaiyun-secondary);
            font-size: 13px;
        }
        .kaiyun-hero-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .kaiyun-hero-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 700;
            transition: var(--kaiyun-transition);
            text-decoration: none;
            cursor: pointer;
        }
        .kaiyun-hero-btn-primary {
            background: var(--kaiyun-primary);
            color: #fff;
            border: 2px solid var(--kaiyun-primary);
        }
        .kaiyun-hero-btn-primary:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(40, 184, 166, 0.4);
        }
        .kaiyun-hero-btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .kaiyun-hero-btn-outline:hover {
            border-color: #fff;
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }
        .kaiyun-hero-progress-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--kaiyun-radius-lg);
            padding: 28px 24px;
            backdrop-filter: blur(8px);
        }
        .kaiyun-hero-progress-card .card-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.68);
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }
        .kaiyun-hero-progress-card .card-value {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            font-family: var(--kaiyun-number-font);
            font-variant-numeric: tabular-nums;
            margin-bottom: 16px;
        }
        .kaiyun-hero-progress-card .card-value small {
            font-size: 16px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.65);
        }
        .kaiyun-hero-progress-track {
            height: 10px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 999px;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .kaiyun-hero-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--kaiyun-primary), #5AD4C4);
            border-radius: 999px;
            transition: width 0.6s ease;
        }
        .kaiyun-hero-progress-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.62);
        }
        .kaiyun-hero-progress-meta strong {
            color: #7DE3D5;
            font-weight: 600;
        }
        .kaiyun-hero-invite-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            padding: 14px;
            margin-top: 20px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 700;
            background: var(--kaiyun-secondary);
            color: var(--kaiyun-dark);
            border: none;
            cursor: pointer;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-hero-invite-btn:hover {
            background: #E6B87F;
            color: var(--kaiyun-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(217, 168, 108, 0.4);
        }

        /* ===== 共性板块 ===== */
        .kaiyun-section {
            padding: 56px 0;
        }
        .kaiyun-section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .kaiyun-section-subtitle {
            font-size: 16px;
            color: var(--kaiyun-text-muted);
            max-width: 680px;
            margin-bottom: 36px;
            line-height: 1.8;
        }
        .kaiyun-section-header {
            margin-bottom: 36px;
        }
        .kaiyun-section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== 服务矩阵（不对称栅格） ===== */
        .kaiyun-service-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 20px;
        }
        .kaiyun-service-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            border: 1px solid var(--kaiyun-border-light);
            overflow: hidden;
            box-shadow: var(--kaiyun-shadow);
            transition: var(--kaiyun-transition);
            display: flex;
            flex-direction: column;
        }
        .kaiyun-service-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
        }
        .kaiyun-service-card .service-img-wrapper {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16/9;
        }
        .kaiyun-service-card .service-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .kaiyun-service-card:hover .service-img-wrapper img {
            transform: scale(1.05);
        }
        .kaiyun-service-card .service-body {
            padding: 22px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .kaiyun-service-card .service-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
            flex-shrink: 0;
        }
        .kaiyun-service-card .service-icon.green {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
        }
        .kaiyun-service-card .service-icon.sand {
            background: rgba(217, 168, 108, 0.16);
            color: var(--kaiyun-secondary);
        }
        .kaiyun-service-card .service-icon.coral {
            background: rgba(227, 139, 109, 0.14);
            color: var(--kaiyun-coral);
        }
        .kaiyun-service-card .service-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .kaiyun-service-card .service-desc {
            font-size: 14px;
            line-height: 1.75;
            color: var(--kaiyun-text-muted);
            margin-bottom: 14px;
            flex: 1;
        }
        .kaiyun-service-card .service-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--kaiyun-transition);
            text-decoration: none;
        }
        .kaiyun-service-card .service-link:hover {
            color: var(--kaiyun-primary-dark);
            gap: 8px;
        }
        .kaiyun-service-card.span-6 {
            grid-column: span 6;
        }
        .kaiyun-service-card.span-4 {
            grid-column: span 4;
        }
        .kaiyun-service-card.span-3 {
            grid-column: span 3;
        }
        .kaiyun-service-card.span-5 {
            grid-column: span 5;
        }
        .kaiyun-service-card.span-7 {
            grid-column: span 7;
        }

        /* ===== 适用场景 ===== */
        .kaiyun-scenario-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .kaiyun-scenario-item {
            display: flex;
            gap: 16px;
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius);
            padding: 22px;
            border: 1px solid var(--kaiyun-border-light);
            box-shadow: var(--kaiyun-shadow);
            transition: var(--kaiyun-transition);
        }
        .kaiyun-scenario-item:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(40, 184, 166, 0.3);
        }
        .kaiyun-scenario-item .scenario-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .kaiyun-scenario-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 6px;
        }
        .kaiyun-scenario-item p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--kaiyun-text-muted);
            margin: 0;
        }

        /* ===== 流程步骤 ===== */
        .kaiyun-process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .kaiyun-process-step {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius);
            padding: 24px 20px;
            text-align: left;
            border: 1px solid var(--kaiyun-border-light);
            box-shadow: var(--kaiyun-shadow);
            position: relative;
            transition: var(--kaiyun-transition);
        }
        .kaiyun-process-step:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-3px);
        }
        .kaiyun-process-step .step-number {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--kaiyun-primary);
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            margin-bottom: 14px;
            font-family: var(--kaiyun-number-font);
        }
        .kaiyun-process-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }
        .kaiyun-process-step p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--kaiyun-text-muted);
            margin: 0;
        }

        /* ===== 品牌介绍 ===== */
        .kaiyun-brand-intro {
            background: var(--kaiyun-dark);
            border-radius: var(--kaiyun-radius-lg);
            padding: 48px 40px;
            color: rgba(255, 255, 255, 0.85);
            position: relative;
            overflow: hidden;
        }
        .kaiyun-brand-intro::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(40, 184, 166, 0.15);
        }
        .kaiyun-brand-intro h2 {
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .kaiyun-brand-intro p {
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
            max-width: 900px;
        }
        .kaiyun-brand-intro p:last-child {
            margin-bottom: 0;
        }
        .kaiyun-brand-intro .brand-highlight {
            color: var(--kaiyun-primary);
            font-weight: 600;
        }

        /* ===== FAQ ===== */
        .kaiyun-accordion .accordion-item {
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--kaiyun-shadow);
            background: var(--kaiyun-card);
        }
        .kaiyun-accordion .accordion-button {
            font-size: 16px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            padding: 18px 22px;
            background: var(--kaiyun-card);
            border: none;
            box-shadow: none;
            font-family: var(--kaiyun-font);
        }
        .kaiyun-accordion .accordion-button:not(.collapsed) {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            box-shadow: none;
        }
        .kaiyun-accordion .accordion-button:focus {
            box-shadow: none;
        }
        .kaiyun-accordion .accordion-button::after {
            transition: transform 0.3s ease;
        }
        .kaiyun-accordion .accordion-body {
            font-size: 15px;
            line-height: 1.85;
            color: var(--kaiyun-text-muted);
            padding: 16px 22px 20px;
        }

        /* ===== CTA 表单 ===== */
        .kaiyun-cta-section {
            background: var(--kaiyun-bg);
            padding: 56px 0;
        }
        .kaiyun-cta-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }
        .kaiyun-cta-info h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            margin-bottom: 14px;
        }
        .kaiyun-cta-info p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--kaiyun-text-muted);
            margin-bottom: 20px;
        }
        .kaiyun-cta-trust {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }
        .kaiyun-cta-trust li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--kaiyun-text);
        }
        .kaiyun-cta-trust li i {
            color: var(--kaiyun-primary);
            margin-top: 4px;
            font-size: 14px;
        }
        .kaiyun-cta-note {
            font-size: 13px;
            color: var(--kaiyun-text-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .kaiyun-cta-note i {
            color: var(--kaiyun-secondary);
        }
        .kaiyun-form-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--kaiyun-border-light);
            box-shadow: var(--kaiyun-shadow);
        }
        .kaiyun-form-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 6px;
        }
        .kaiyun-form-card .form-hint {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            margin-bottom: 20px;
        }
        .kaiyun-form-card .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-text);
            margin-bottom: 6px;
        }
        .kaiyun-form-card .form-control,
        .kaiyun-form-card .form-select {
            border: 1px solid var(--kaiyun-border);
            border-radius: var(--kaiyun-radius-sm);
            padding: 12px 16px;
            font-size: 15px;
            font-family: var(--kaiyun-font);
            color: var(--kaiyun-text);
            transition: var(--kaiyun-transition);
            background: var(--kaiyun-card);
        }
        .kaiyun-form-card .form-control:focus,
        .kaiyun-form-card .form-select:focus {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
            outline: none;
        }
        .kaiyun-form-card .form-control::placeholder {
            color: var(--kaiyun-text-light);
        }
        .kaiyun-form-card textarea.form-control {
            min-height: 100px;
            resize: vertical;
        }
        .kaiyun-form-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            width: 100%;
            padding: 14px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            cursor: pointer;
            font-family: var(--kaiyun-font);
        }
        .kaiyun-form-btn:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(40, 184, 166, 0.35);
        }

        /* ===== Footer ===== */
        .kaiyun-footer {
            background: var(--kaiyun-darker);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .kaiyun-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .kaiyun-footer-brand .kaiyun-logo {
            color: #fff;
            font-size: 24px;
            margin-bottom: 16px;
            display: flex;
        }
        .kaiyun-footer-brand .kaiyun-logo:hover {
            color: #fff;
        }
        .kaiyun-footer-brand p {
            font-size: 14px;
            line-height: 1.85;
            color: rgba(255, 255, 255, 0.62);
            margin: 0;
            max-width: 300px;
        }
        .kaiyun-footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .kaiyun-footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .kaiyun-footer-col ul li {
            margin-bottom: 10px;
        }
        .kaiyun-footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.62);
            transition: var(--kaiyun-transition);
            text-decoration: none;
        }
        .kaiyun-footer-col ul li a:hover {
            color: var(--kaiyun-primary);
        }
        .kaiyun-footer-bottom {
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .kaiyun-footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin: 0;
        }
        .kaiyun-footer-bottom a {
            color: rgba(255, 255, 255, 0.62);
            font-size: 13px;
            text-decoration: none;
        }
        .kaiyun-footer-bottom a:hover {
            color: var(--kaiyun-primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 992px) {
            .kaiyun-service-card.span-6,
            .kaiyun-service-card.span-4,
            .kaiyun-service-card.span-3,
            .kaiyun-service-card.span-5,
            .kaiyun-service-card.span-7 {
                grid-column: span 6;
            }
            .kaiyun-process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kaiyun-cta-wrapper {
                grid-template-columns: 1fr;
            }
            .kaiyun-footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .kaiyun-brand-bar {
                flex-wrap: wrap;
                gap: 12px;
            }
            .kaiyun-search-box {
                min-width: 0;
                flex: 1;
            }
            .kaiyun-category-hero .container {
                padding: 40px 16px;
            }
            .kaiyun-category-hero h1 {
                font-size: 28px;
            }
            .kaiyun-category-hero .hero-desc {
                font-size: 15px;
            }
            .kaiyun-hero-progress-card {
                margin-top: 28px;
            }
            .kaiyun-section {
                padding: 40px 0;
            }
            .kaiyun-section-title {
                font-size: 24px;
            }
            .kaiyun-service-card.span-6,
            .kaiyun-service-card.span-4,
            .kaiyun-service-card.span-3,
            .kaiyun-service-card.span-5,
            .kaiyun-service-card.span-7 {
                grid-column: span 12;
            }
            .kaiyun-scenario-list {
                grid-template-columns: 1fr;
            }
            .kaiyun-process-grid {
                grid-template-columns: 1fr;
            }
            .kaiyun-brand-intro {
                padding: 32px 20px;
            }
            .kaiyun-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kaiyun-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .kaiyun-cta-wrapper {
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .kaiyun-category-hero h1 {
                font-size: 24px;
                line-height: 1.35;
            }
            .kaiyun-hero-btn {
                width: 100%;
                justify-content: center;
            }
            .kaiyun-hero-btn-group {
                flex-direction: column;
            }
            .kaiyun-hero-invite-info {
                flex-direction: column;
            }
            .kaiyun-channel-link {
                padding: 6px 12px;
                font-size: 13px;
            }
            .kaiyun-channel-row {
                gap: 4px;
            }
            .kaiyun-service-card .service-body {
                padding: 18px 16px;
            }
            .kaiyun-section-title {
                font-size: 22px;
            }
            .kaiyun-form-card {
                padding: 24px 18px;
            }
        }

/* roulang page: category4 */
:root {
            --kaiyun-primary: #28B8A6;
            --kaiyun-primary-dark: #1F9E8F;
            --kaiyun-primary-light: #E8F7F5;
            --kaiyun-secondary: #D9A86C;
            --kaiyun-coral: #E38B6D;
            --kaiyun-dark: #1B1F24;
            --kaiyun-darker: #15181C;
            --kaiyun-bg: #F5F7F6;
            --kaiyun-card: #FFFFFF;
            --kaiyun-text: #2A3038;
            --kaiyun-text-muted: #6B7480;
            --kaiyun-text-light: #A8B0B8;
            --kaiyun-border: #D9DEE3;
            --kaiyun-border-light: #E8ECEF;
            --kaiyun-radius-sm: 8px;
            --kaiyun-radius: 12px;
            --kaiyun-radius-lg: 16px;
            --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
            --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
            --kaiyun-transition: all 0.2s ease;
            --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kaiyun-font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kaiyun-text);
            background-color: var(--kaiyun-bg);
            overflow-x: hidden;
        }

        a {
            color: var(--kaiyun-primary);
            text-decoration: none;
            transition: var(--kaiyun-transition);
        }

        a:hover {
            color: var(--kaiyun-primary-dark);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(40, 184, 166, 0.4);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        .section-gap {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        @media (max-width: 768px) {
            .section-gap {
                padding-top: 48px;
                padding-bottom: 48px;
            }
        }

        /* ===== Header ===== */
        .kaiyun-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--kaiyun-card);
            box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }

        .kaiyun-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .kaiyun-logo:hover {
            color: var(--kaiyun-dark);
        }

        .kaiyun-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-brand-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .kaiyun-search-box {
            display: flex;
            align-items: center;
            background: var(--kaiyun-bg);
            border: 1px solid var(--kaiyun-border);
            border-radius: 999px;
            padding: 6px 16px;
            gap: 8px;
            min-width: 220px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-search-box:focus-within {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        }

        .kaiyun-search-box i {
            color: var(--kaiyun-text-muted);
            font-size: 14px;
        }

        .kaiyun-search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--kaiyun-text);
            width: 100%;
            font-family: var(--kaiyun-font);
        }

        .kaiyun-search-box input::placeholder {
            color: var(--kaiyun-text-light);
        }

        .kaiyun-login-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            background: transparent;
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }

        .kaiyun-login-btn:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-primary-btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }

        .kaiyun-primary-btn-sm:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
        }

        .kaiyun-channel-row {
            display: flex;
            gap: 6px;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-wrap: nowrap;
            border-top: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-channel-row::-webkit-scrollbar {
            display: none;
        }

        .kaiyun-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-text-muted);
            background: transparent;
            white-space: nowrap;
            transition: var(--kaiyun-transition);
            border: 1px solid transparent;
        }

        .kaiyun-channel-link i {
            font-size: 13px;
            opacity: 0.7;
        }

        .kaiyun-channel-link:hover {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-channel-link.active {
            color: #fff;
            background: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-channel-link.active i {
            opacity: 1;
        }

        @media (max-width: 991px) {
            .kaiyun-search-box {
                min-width: 160px;
            }
        }

        @media (max-width: 768px) {
            .kaiyun-brand-bar {
                padding: 10px 0;
            }
            .kaiyun-logo {
                font-size: 18px;
            }
            .kaiyun-logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 17px;
            }
            .kaiyun-search-box {
                min-width: 120px;
                padding: 4px 12px;
            }
            .kaiyun-login-btn {
                padding: 6px 14px;
                font-size: 12px;
            }
            .kaiyun-primary-btn-sm {
                padding: 6px 16px;
                font-size: 12px;
            }
            .kaiyun-channel-link {
                padding: 6px 12px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .kaiyun-search-box {
                display: none;
            }
            .kaiyun-login-btn {
                padding: 5px 12px;
                font-size: 11px;
            }
            .kaiyun-primary-btn-sm {
                padding: 5px 14px;
                font-size: 11px;
            }
        }

        /* ===== Page Hero ===== */
        .kaiyun-page-hero {
            background: var(--kaiyun-dark);
            position: relative;
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .kaiyun-page-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.45;
            z-index: 1;
        }

        .kaiyun-page-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27,31,36,0.88) 0%, rgba(27,31,36,0.62) 60%, rgba(40,184,166,0.35) 100%);
            z-index: 2;
        }

        .kaiyun-page-hero .container {
            position: relative;
            z-index: 3;
        }

        .kaiyun-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(40, 184, 166, 0.18);
            color: #8FE5D8;
            border: 1px solid rgba(40, 184, 166, 0.35);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .kaiyun-page-hero h1 {
            color: #FFFFFF;
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .kaiyun-page-hero .hero-desc {
            color: rgba(255, 255, 255, 0.85);
            font-size: 17px;
            line-height: 1.9;
            max-width: 680px;
            margin-bottom: 30px;
        }

        .kaiyun-hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .kaiyun-btn-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            border: 1px solid transparent;
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }

        .kaiyun-btn-lg.kaiyun-btn-primary {
            background: var(--kaiyun-primary);
            color: #fff;
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-btn-lg.kaiyun-btn-primary:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(40, 184, 166, 0.35);
        }

        .kaiyun-btn-lg.kaiyun-btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .kaiyun-btn-lg.kaiyun-btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.8);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .kaiyun-page-hero {
                min-height: 360px;
            }
            .kaiyun-page-hero h1 {
                font-size: 28px;
            }
            .kaiyun-page-hero .hero-desc {
                font-size: 15px;
            }
            .kaiyun-btn-lg {
                padding: 12px 22px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .kaiyun-page-hero h1 {
                font-size: 24px;
            }
            .kaiyun-page-hero .hero-desc {
                font-size: 14px;
            }
            .kaiyun-hero-cta-group {
                flex-direction: column;
            }
            .kaiyun-btn-lg {
                justify-content: center;
                width: 100%;
            }
        }

        /* ===== Section Title ===== */
        .kaiyun-section-head {
            margin-bottom: 48px;
        }

        .kaiyun-section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--kaiyun-primary);
            margin-bottom: 12px;
        }

        .kaiyun-section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--kaiyun-primary);
            border-radius: 2px;
        }

        .kaiyun-section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .kaiyun-section-head p {
            font-size: 16px;
            color: var(--kaiyun-text-muted);
            line-height: 1.9;
            max-width: 720px;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .kaiyun-section-head {
                margin-bottom: 32px;
            }
            .kaiyun-section-head h2 {
                font-size: 24px;
            }
            .kaiyun-section-head p {
                font-size: 14px;
            }
        }

        /* ===== Solution Cards ===== */
        .kaiyun-sol-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            border: 1px solid var(--kaiyun-border-light);
            overflow: hidden;
            transition: var(--kaiyun-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            box-shadow: var(--kaiyun-shadow);
        }

        .kaiyun-sol-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(40, 184, 166, 0.3);
        }

        .kaiyun-sol-card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            flex-shrink: 0;
        }

        .kaiyun-sol-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .kaiyun-sol-card:hover .kaiyun-sol-card-img img {
            transform: scale(1.04);
        }

        .kaiyun-sol-card-img .sol-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 12px;
            background: rgba(27, 31, 36, 0.8);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            letter-spacing: 0.5px;
            z-index: 2;
        }

        .kaiyun-sol-card-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .kaiyun-sol-card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 10px;
            line-height: 1.4;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-sol-card:hover .kaiyun-sol-card-body h3 {
            color: var(--kaiyun-primary);
        }

        .kaiyun-sol-card-body p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.8;
            margin-bottom: 18px;
            flex-grow: 1;
        }

        .kaiyun-sol-card-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--kaiyun-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-sol-card-link:hover {
            color: var(--kaiyun-primary-dark);
            gap: 10px;
        }

        /* Large feature card */
        .kaiyun-sol-feature-card {
            background: var(--kaiyun-dark);
            border-radius: var(--kaiyun-radius-lg);
            overflow: hidden;
            border: none;
            height: 100%;
            position: relative;
            box-shadow: var(--kaiyun-shadow);
            transition: var(--kaiyun-transition);
        }

        .kaiyun-sol-feature-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
        }

        .kaiyun-sol-feature-card .feat-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/coverpic/cover-5.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 1;
        }

        .kaiyun-sol-feature-card .feat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27,31,36,0.95) 0%, rgba(27,31,36,0.7) 60%, rgba(40,184,166,0.45) 100%);
            z-index: 2;
        }

        .kaiyun-sol-feature-card .feat-content {
            position: relative;
            z-index: 3;
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            min-height: 100%;
        }

        .kaiyun-sol-feature-card .feat-icon {
            width: 52px;
            height: 52px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            flex-shrink: 0;
        }

        .kaiyun-sol-feature-card h3 {
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .kaiyun-sol-feature-card p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .kaiyun-sol-feature-card .feat-link {
            color: #8FE5D8;
            font-weight: 700;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .kaiyun-sol-feature-card .feat-link:hover {
            color: #A8F0E5;
        }

        @media (max-width: 768px) {
            .kaiyun-sol-card-body {
                padding: 18px;
            }
            .kaiyun-sol-feature-card .feat-content {
                padding: 24px 20px;
            }
            .kaiyun-sol-feature-card h3 {
                font-size: 20px;
            }
            .kaiyun-sol-feature-card p {
                font-size: 14px;
            }
        }

        /* ===== Scenario Tags ===== */
        .kaiyun-scenario-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius);
            border: 1px solid var(--kaiyun-border-light);
            padding: 24px 22px;
            transition: var(--kaiyun-transition);
            height: 100%;
            box-shadow: var(--kaiyun-shadow);
        }

        .kaiyun-scenario-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            border-color: rgba(40, 184, 166, 0.3);
            transform: translateY(-3px);
        }

        .kaiyun-scenario-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .kaiyun-scenario-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }

        .kaiyun-scenario-card p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .kaiyun-scenario-card {
                padding: 18px 16px;
            }
            .kaiyun-scenario-card h4 {
                font-size: 15px;
            }
            .kaiyun-scenario-card p {
                font-size: 13px;
            }
        }

        /* ===== Process Steps ===== */
        .kaiyun-step-card {
            text-align: center;
            padding: 32px 24px;
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            border: 1px solid var(--kaiyun-border-light);
            transition: var(--kaiyun-transition);
            height: 100%;
            position: relative;
            box-shadow: var(--kaiyun-shadow);
        }

        .kaiyun-step-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
        }

        .kaiyun-step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--kaiyun-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 18px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-step-card:hover .kaiyun-step-num {
            background: var(--kaiyun-primary-dark);
            transform: scale(1.06);
        }

        .kaiyun-step-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 10px;
        }

        .kaiyun-step-card p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.8;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .kaiyun-step-card {
                padding: 24px 16px;
            }
            .kaiyun-step-num {
                width: 40px;
                height: 40px;
                font-size: 16px;
                margin-bottom: 14px;
            }
            .kaiyun-step-card h4 {
                font-size: 16px;
            }
            .kaiyun-step-card p {
                font-size: 13px;
            }
        }

        /* ===== Comparison Panel ===== */
        .kaiyun-compare-panel {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            border: 1px solid var(--kaiyun-border-light);
            overflow: hidden;
            box-shadow: var(--kaiyun-shadow);
        }

        .kaiyun-compare-header {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-compare-header-col {
            padding: 20px 28px;
            font-size: 16px;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-align: center;
        }

        .kaiyun-compare-header-col.left {
            background: #F0F2F4;
            color: var(--kaiyun-text-muted);
        }

        .kaiyun-compare-header-col.right {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
        }

        .kaiyun-compare-body {
            padding: 8px 0;
        }

        .kaiyun-compare-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            padding: 16px 28px;
            border-bottom: 1px solid var(--kaiyun-border-light);
            align-items: center;
        }

        .kaiyun-compare-row:last-child {
            border-bottom: none;
        }

        .kaiyun-compare-row .left-val {
            color: var(--kaiyun-text-light);
            font-size: 15px;
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .kaiyun-compare-row .right-val {
            color: var(--kaiyun-dark);
            font-size: 16px;
            font-weight: 700;
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .kaiyun-compare-row .right-val i {
            color: var(--kaiyun-primary);
        }

        .kaiyun-compare-row .left-val i {
            color: #C0C6CC;
        }

        @media (max-width: 768px) {
            .kaiyun-compare-header-col {
                padding: 14px 16px;
                font-size: 14px;
            }
            .kaiyun-compare-row {
                padding: 12px 16px;
            }
            .kaiyun-compare-row .left-val,
            .kaiyun-compare-row .right-val {
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .kaiyun-compare-header-col {
                font-size: 12px;
                padding: 10px 8px;
            }
            .kaiyun-compare-row {
                padding: 10px 8px;
            }
            .kaiyun-compare-row .left-val,
            .kaiyun-compare-row .right-val {
                font-size: 12px;
                flex-direction: column;
                gap: 4px;
            }
        }

        /* ===== FAQ ===== */
        .kaiyun-faq-item {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius);
            border: 1px solid var(--kaiyun-border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--kaiyun-transition);
            box-shadow: var(--kaiyun-shadow);
        }

        .kaiyun-faq-item:hover {
            box-shadow: var(--kaiyun-shadow-hover);
        }

        .kaiyun-faq-item .accordion-button {
            background: transparent;
            border: none;
            box-shadow: none;
            font-weight: 700;
            font-size: 16px;
            color: var(--kaiyun-dark);
            padding: 18px 22px;
            font-family: var(--kaiyun-font);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            cursor: pointer;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-faq-item .accordion-button:focus {
            outline: 3px solid rgba(40, 184, 166, 0.3);
            outline-offset: -2px;
        }

        .kaiyun-faq-item .accordion-button:not(.collapsed) {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-faq-item .accordion-button::after {
            display: none;
        }

        .kaiyun-faq-item .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--kaiyun-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: var(--kaiyun-transition);
            color: var(--kaiyun-text-muted);
        }

        .kaiyun-faq-item .accordion-button:not(.collapsed) .faq-icon {
            background: var(--kaiyun-primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .kaiyun-faq-item .accordion-body {
            padding: 4px 22px 20px;
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.9;
        }

        .kaiyun-faq-item .accordion-body p {
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .kaiyun-faq-item .accordion-button {
                font-size: 14px;
                padding: 14px 16px;
            }
            .kaiyun-faq-item .accordion-body {
                padding: 4px 16px 16px;
                font-size: 13px;
            }
        }

        /* ===== CTA Form ===== */
        .kaiyun-cta-section {
            background: var(--kaiyun-dark);
            position: relative;
            overflow: hidden;
        }

        .kaiyun-cta-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(40, 184, 166, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .kaiyun-cta-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(217, 168, 108, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .kaiyun-cta-left .kaiyun-section-head h2 {
            color: #fff;
        }

        .kaiyun-cta-left .kaiyun-section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        .kaiyun-cta-points {
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
        }

        .kaiyun-cta-points li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .kaiyun-cta-points li i {
            color: var(--kaiyun-primary);
            font-size: 18px;
            flex-shrink: 0;
            margin-top: 4px;
        }

        .kaiyun-form-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            padding: 36px 32px;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 2;
        }

        .kaiyun-form-card h3 {
            font-size: 22px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }

        .kaiyun-form-card .form-subtitle {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            margin-bottom: 24px;
        }

        .kaiyun-form-card .form-label {
            font-weight: 600;
            font-size: 14px;
            color: var(--kaiyun-dark);
            margin-bottom: 6px;
        }

        .kaiyun-form-card .form-control,
        .kaiyun-form-card .form-select {
            border: 1px solid var(--kaiyun-border);
            border-radius: var(--kaiyun-radius-sm);
            padding: 12px 16px;
            font-size: 14px;
            color: var(--kaiyun-text);
            font-family: var(--kaiyun-font);
            transition: var(--kaiyun-transition);
            background: #fff;
        }

        .kaiyun-form-card .form-control:focus,
        .kaiyun-form-card .form-select:focus {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
            outline: none;
        }

        .kaiyun-form-card .form-control::placeholder {
            color: var(--kaiyun-text-light);
        }

        .kaiyun-form-card textarea.form-control {
            min-height: 110px;
            resize: vertical;
        }

        .kaiyun-form-submit {
            width: 100%;
            padding: 14px 28px;
            background: var(--kaiyun-primary);
            color: #fff;
            border: 1px solid var(--kaiyun-primary);
            border-radius: 999px;
            font-size: 16px;
            font-weight: 700;
            font-family: var(--kaiyun-font);
            transition: var(--kaiyun-transition);
            cursor: pointer;
            letter-spacing: 0.5px;
        }

        .kaiyun-form-submit:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(40, 184, 166, 0.35);
        }

        .kaiyun-form-submit:active {
            transform: translateY(0);
        }

        @media (max-width: 768px) {
            .kaiyun-form-card {
                padding: 24px 20px;
            }
            .kaiyun-cta-points li {
                font-size: 13px;
            }
        }

        /* ===== Footer ===== */
        .kaiyun-footer {
            background: var(--kaiyun-darker);
            padding: 64px 0 28px;
            color: rgba(255, 255, 255, 0.7);
        }

        .kaiyun-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .kaiyun-footer-brand .kaiyun-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .kaiyun-footer-brand .kaiyun-logo .logo-icon {
            background: var(--kaiyun-primary);
        }

        .kaiyun-footer-brand .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
        }

        .kaiyun-footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .kaiyun-footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kaiyun-footer-col ul li {
            margin-bottom: 10px;
        }

        .kaiyun-footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--kaiyun-transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .kaiyun-footer-col ul li a:hover {
            color: var(--kaiyun-primary);
            transform: translateX(4px);
        }

        .kaiyun-footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
        }

        .kaiyun-footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            margin-bottom: 6px;
        }

        .kaiyun-footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
        }

        .kaiyun-footer-bottom a:hover {
            color: var(--kaiyun-primary);
        }

        @media (max-width: 991px) {
            .kaiyun-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .kaiyun-footer {
                padding: 40px 0 20px;
            }
            .kaiyun-footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-bottom: 24px;
            }
            .kaiyun-footer-bottom {
                padding-top: 16px;
            }
        }

/* roulang page: category5 */
:root {
        --kaiyun-primary: #28B8A6;
        --kaiyun-primary-dark: #1F9E8F;
        --kaiyun-primary-light: #E8F7F5;
        --kaiyun-secondary: #D9A86C;
        --kaiyun-coral: #E38B6D;
        --kaiyun-dark: #1B1F24;
        --kaiyun-darker: #15181C;
        --kaiyun-bg: #F5F7F6;
        --kaiyun-card: #FFFFFF;
        --kaiyun-text: #2A3038;
        --kaiyun-text-muted: #6B7480;
        --kaiyun-text-light: #A8B0B8;
        --kaiyun-border: #D9DEE3;
        --kaiyun-border-light: #E8ECEF;
        --kaiyun-radius-sm: 8px;
        --kaiyun-radius: 12px;
        --kaiyun-radius-lg: 16px;
        --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
        --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
        --kaiyun-transition: all 0.2s ease;
        --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
        --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        font-family: var(--kaiyun-font);
        font-size: 16px;
        line-height: 1.8;
        color: var(--kaiyun-text);
        background-color: var(--kaiyun-bg);
        overflow-x: hidden;
    }

    a {
        color: var(--kaiyun-primary);
        text-decoration: none;
        transition: var(--kaiyun-transition);
    }

    a:hover {
        color: var(--kaiyun-primary-dark);
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible {
        outline: 3px solid rgba(40, 184, 166, 0.4);
        outline-offset: 2px;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    .container {
        max-width: 1200px;
        padding-left: 24px;
        padding-right: 24px;
    }

    @media (max-width: 575.98px) {
        .container {
            padding-left: 16px;
            padding-right: 16px;
        }
    }

    /* ===== Header / Nav ===== */
    .kaiyun-header {
        position: sticky;
        top: 0;
        z-index: 1050;
        background: var(--kaiyun-card);
        box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06);
        border-bottom: 1px solid var(--kaiyun-border-light);
    }

    .kaiyun-brand-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 0;
        gap: 20px;
        flex-wrap: wrap;
    }

    .kaiyun-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 22px;
        font-weight: 800;
        color: var(--kaiyun-dark);
        letter-spacing: 0.5px;
        white-space: nowrap;
    }
    .kaiyun-logo:hover {
        color: var(--kaiyun-dark);
    }
    .kaiyun-logo .logo-icon {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--kaiyun-primary);
        color: #fff;
        border-radius: 10px;
        font-size: 20px;
        font-weight: 700;
        flex-shrink: 0;
    }
    .kaiyun-logo span {
        color: var(--kaiyun-primary);
    }

    .kaiyun-brand-right {
        display: flex;
        align-items: center;
        gap: 14px;
    }

    .kaiyun-search-box {
        display: flex;
        align-items: center;
        background: var(--kaiyun-bg);
        border: 1px solid var(--kaiyun-border);
        border-radius: 999px;
        padding: 6px 16px;
        gap: 8px;
        min-width: 220px;
        transition: var(--kaiyun-transition);
    }
    .kaiyun-search-box:focus-within {
        border-color: var(--kaiyun-primary);
        box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
    }
    .kaiyun-search-box i {
        color: var(--kaiyun-text-muted);
        font-size: 14px;
    }
    .kaiyun-search-box input {
        border: none;
        background: transparent;
        outline: none;
        font-size: 14px;
        color: var(--kaiyun-text);
        width: 100%;
        font-family: var(--kaiyun-font);
    }
    .kaiyun-search-box input::placeholder {
        color: var(--kaiyun-text-light);
    }

    .kaiyun-login-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 18px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        color: var(--kaiyun-primary);
        background: transparent;
        border: 1px solid var(--kaiyun-primary);
        transition: var(--kaiyun-transition);
        white-space: nowrap;
    }
    .kaiyun-login-btn:hover {
        background: var(--kaiyun-primary-light);
        color: var(--kaiyun-primary-dark);
        border-color: var(--kaiyun-primary);
    }

    .kaiyun-primary-btn-sm {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 20px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 700;
        color: #fff;
        background: var(--kaiyun-primary);
        border: 1px solid var(--kaiyun-primary);
        transition: var(--kaiyun-transition);
        white-space: nowrap;
        cursor: pointer;
    }
    .kaiyun-primary-btn-sm:hover {
        background: var(--kaiyun-primary-dark);
        border-color: var(--kaiyun-primary-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 6px 14px rgba(40, 184, 166, 0.3);
    }

    .kaiyun-channel-row {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 8px 0 12px;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        flex-wrap: nowrap;
    }
    .kaiyun-channel-row::-webkit-scrollbar {
        display: none;
    }
    .kaiyun-channel-link {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        padding: 7px 16px;
        font-size: 14px;
        font-weight: 600;
        color: var(--kaiyun-text-muted);
        border-radius: 999px;
        white-space: nowrap;
        transition: var(--kaiyun-transition);
        border-bottom: 2px solid transparent;
    }
    .kaiyun-channel-link i {
        font-size: 13px;
    }
    .kaiyun-channel-link:hover {
        color: var(--kaiyun-primary);
        background: var(--kaiyun-primary-light);
    }
    .kaiyun-channel-link.active {
        color: var(--kaiyun-primary);
        background: var(--kaiyun-primary-light);
        border-bottom-color: var(--kaiyun-primary);
        border-radius: 999px;
    }

    /* ===== Breadcrumb ===== */
    .kaiyun-breadcrumb {
        padding: 20px 0 0;
        font-size: 14px;
        color: var(--kaiyun-text-muted);
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: wrap;
    }
    .kaiyun-breadcrumb a {
        color: var(--kaiyun-text-muted);
    }
    .kaiyun-breadcrumb a:hover {
        color: var(--kaiyun-primary);
    }
    .kaiyun-breadcrumb .separator {
        color: var(--kaiyun-text-light);
        font-size: 12px;
    }
    .kaiyun-breadcrumb .current {
        color: var(--kaiyun-primary);
        font-weight: 600;
    }

    /* ===== Hero (案例中心沉浸暗底) ===== */
    .kaiyun-case-hero {
        position: relative;
        background: linear-gradient(135deg, #15181C 0%, #1B1F24 50%, #1E2A30 100%);
        overflow: hidden;
        margin-top: 8px;
        border-radius: var(--kaiyun-radius-lg);
        padding: 64px 40px;
        color: #fff;
    }
    .kaiyun-case-hero::before {
        content: '';
        position: absolute;
        top: -60px;
        right: -40px;
        width: 420px;
        height: 420px;
        background: radial-gradient(circle, rgba(40, 184, 166, 0.25) 0%, transparent 70%);
        pointer-events: none;
    }
    .kaiyun-case-hero::after {
        content: '';
        position: absolute;
        bottom: -30px;
        left: 20%;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(217, 168, 108, 0.15) 0%, transparent 70%);
        pointer-events: none;
    }
    .kaiyun-case-hero .hero-grid {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 48px;
        align-items: center;
    }
    .kaiyun-case-hero .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(40, 184, 166, 0.16);
        border: 1px solid rgba(40, 184, 166, 0.4);
        padding: 6px 16px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        color: #7FE0D2;
        margin-bottom: 20px;
    }
    .kaiyun-case-hero .hero-badge i {
        color: var(--kaiyun-secondary);
    }
    .kaiyun-case-hero h1 {
        font-size: clamp(28px, 4.5vw, 44px);
        font-weight: 800;
        line-height: 1.25;
        margin-bottom: 20px;
        color: #fff;
        letter-spacing: 0.3px;
    }
    .kaiyun-case-hero h1 .highlight {
        color: #6FE0D0;
    }
    .kaiyun-case-hero .hero-sub {
        font-size: 16px;
        line-height: 1.7;
        color: #C5CDD6;
        max-width: 600px;
        margin-bottom: 28px;
    }
    .kaiyun-hero-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
    }
    .kaiyun-hero-btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 13px 28px;
        border-radius: 999px;
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        background: var(--kaiyun-primary);
        border: 1px solid var(--kaiyun-primary);
        transition: var(--kaiyun-transition);
        white-space: nowrap;
        cursor: pointer;
    }
    .kaiyun-hero-btn-primary:hover {
        background: var(--kaiyun-primary-dark);
        border-color: var(--kaiyun-primary-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(40, 184, 166, 0.35);
    }
    .kaiyun-hero-btn-secondary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 13px 28px;
        border-radius: 999px;
        font-size: 16px;
        font-weight: 600;
        color: #E8ECEF;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.25);
        transition: var(--kaiyun-transition);
        white-space: nowrap;
        cursor: pointer;
    }
    .kaiyun-hero-btn-secondary:hover {
        background: rgba(255, 255, 255, 0.15);
        border-color: rgba(255, 255, 255, 0.4);
        color: #fff;
    }

    .kaiyun-hero-stats {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: var(--kaiyun-radius);
        padding: 24px;
        backdrop-filter: blur(4px);
    }
    .kaiyun-hero-stat-item {
        text-align: left;
    }
    .kaiyun-hero-stat-item .stat-number {
        font-family: var(--kaiyun-number-font);
        font-size: 32px;
        font-weight: 700;
        color: #6FE0D0;
        line-height: 1.2;
        letter-spacing: -0.5px;
    }
    .kaiyun-hero-stat-item .stat-label {
        font-size: 13px;
        color: #A8B0B8;
        margin-top: 4px;
    }
    .kaiyun-hero-stat-item .stat-trend {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        font-size: 12px;
        font-weight: 600;
        color: #6FE0D0;
        margin-top: 6px;
    }

    /* ===== Section common ===== */
    .kaiyun-section {
        padding: 64px 0;
    }
    .kaiyun-section-sm {
        padding: 40px 0;
    }
    .kaiyun-section-header {
        margin-bottom: 40px;
    }
    .kaiyun-section-header h2 {
        font-size: clamp(24px, 3vw, 32px);
        font-weight: 700;
        color: var(--kaiyun-dark);
        margin-bottom: 12px;
        letter-spacing: 0.3px;
    }
    .kaiyun-section-header p {
        font-size: 16px;
        color: var(--kaiyun-text-muted);
        max-width: 680px;
        line-height: 1.8;
    }
    .kaiyun-section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        font-weight: 700;
        color: var(--kaiyun-primary);
        text-transform: uppercase;
        letter-spacing: 1px;
        margin-bottom: 8px;
    }
    .kaiyun-section-tag i {
        font-size: 12px;
    }

    /* ===== Stats bar ===== */
    .kaiyun-stats-bar {
        background: var(--kaiyun-card);
        border-radius: var(--kaiyun-radius-lg);
        box-shadow: var(--kaiyun-shadow);
        padding: 28px 24px;
        margin-top: -32px;
        position: relative;
        z-index: 5;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        border: 1px solid var(--kaiyun-border-light);
    }
    .kaiyun-stats-bar .stat-item {
        text-align: center;
        padding: 8px 12px;
        border-radius: var(--kaiyun-radius-sm);
    }
    .kaiyun-stats-bar .stat-icon {
        font-size: 22px;
        color: var(--kaiyun-primary);
        margin-bottom: 8px;
    }
    .kaiyun-stats-bar .stat-number {
        font-family: var(--kaiyun-number-font);
        font-size: 28px;
        font-weight: 700;
        color: var(--kaiyun-dark);
        line-height: 1.2;
    }
    .kaiyun-stats-bar .stat-label {
        font-size: 13px;
        color: var(--kaiyun-text-muted);
        margin-top: 4px;
    }

    /* ===== Case cards ===== */
    .kaiyun-case-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 22px;
    }
    .kaiyun-case-card {
        background: var(--kaiyun-card);
        border-radius: var(--kaiyun-radius-lg);
        overflow: hidden;
        box-shadow: var(--kaiyun-shadow);
        transition: var(--kaiyun-transition);
        border: 1px solid var(--kaiyun-border-light);
        display: flex;
        flex-direction: column;
    }
    .kaiyun-case-card:hover {
        box-shadow: var(--kaiyun-shadow-hover);
        transform: translateY(-4px);
        border-color: var(--kaiyun-primary);
    }
    .kaiyun-case-card .card-img-wrap {
        position: relative;
        aspect-ratio: 16/10;
        overflow: hidden;
    }
    .kaiyun-case-card .card-img-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.4s ease;
    }
    .kaiyun-case-card:hover .card-img-wrap img {
        transform: scale(1.04);
    }
    .kaiyun-case-card .card-img-wrap .img-tag {
        position: absolute;
        top: 12px;
        left: 12px;
        background: var(--kaiyun-primary);
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 999px;
        letter-spacing: 0.5px;
    }
    .kaiyun-case-card .card-img-wrap .img-tag.alt {
        background: var(--kaiyun-secondary);
    }
    .kaiyun-case-card .card-body {
        padding: 18px 20px 20px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }
    .kaiyun-case-card .card-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--kaiyun-dark);
        margin-bottom: 10px;
        line-height: 1.5;
        transition: var(--kaiyun-transition);
    }
    .kaiyun-case-card:hover .card-title {
        color: var(--kaiyun-primary);
    }
    .kaiyun-case-card .card-desc {
        font-size: 14px;
        color: var(--kaiyun-text-muted);
        line-height: 1.75;
        margin-bottom: 16px;
        flex: 1;
    }
    .kaiyun-case-card .card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 13px;
        color: var(--kaiyun-text-light);
        border-top: 1px solid var(--kaiyun-border-light);
        padding-top: 12px;
    }
    .kaiyun-case-card .card-meta .meta-data {
        display: flex;
        align-items: center;
        gap: 4px;
    }
    .kaiyun-case-card .card-meta .meta-data i {
        font-size: 12px;
        color: var(--kaiyun-primary);
    }
    .kaiyun-case-card .card-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--kaiyun-primary);
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }
    .kaiyun-case-card .card-link:hover {
        color: var(--kaiyun-primary-dark);
    }

    /* ===== Comparison ===== */
    .kaiyun-comparison {
        background: var(--kaiyun-dark);
        border-radius: var(--kaiyun-radius-lg);
        padding: 48px 40px;
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .kaiyun-comparison::before {
        content: '';
        position: absolute;
        top: -100px;
        right: -80px;
        width: 360px;
        height: 360px;
        background: radial-gradient(circle, rgba(40, 184, 166, 0.2) 0%, transparent 70%);
        pointer-events: none;
    }
    .kaiyun-comparison .comparison-grid {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .kaiyun-comparison-panel {
        border-radius: var(--kaiyun-radius);
        padding: 26px 28px;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .kaiyun-comparison-panel.before {
        background: rgba(255, 255, 255, 0.04);
    }
    .kaiyun-comparison-panel.after {
        background: rgba(40, 184, 166, 0.12);
        border-color: rgba(40, 184, 166, 0.4);
    }
    .kaiyun-comparison-panel .panel-title {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 20px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .kaiyun-comparison-panel.before .panel-title {
        color: #A8B0B8;
    }
    .kaiyun-comparison-panel.after .panel-title {
        color: #6FE0D0;
    }
    .kaiyun-comparison-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .kaiyun-comparison-list li {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 12px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        font-size: 14px;
        color: #C5CDD6;
    }
    .kaiyun-comparison-list li:last-child {
        border-bottom: none;
    }
    .kaiyun-comparison-list li .value {
        font-family: var(--kaiyun-number-font);
        font-weight: 700;
        font-size: 17px;
    }
    .kaiyun-comparison-panel.before .value {
        color: #E38B6D;
    }
    .kaiyun-comparison-panel.after .value {
        color: #6FE0D0;
    }

    /* ===== Industry tags ===== */
    .kaiyun-industry-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }
    .kaiyun-industry-tag {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--kaiyun-card);
        border: 1px solid var(--kaiyun-border);
        padding: 10px 18px;
        border-radius: 999px;
        font-size: 14px;
        font-weight: 600;
        color: var(--kaiyun-text);
        transition: var(--kaiyun-transition);
        cursor: default;
    }
    .kaiyun-industry-tag i {
        color: var(--kaiyun-primary);
        font-size: 14px;
    }
    .kaiyun-industry-tag:hover {
        border-color: var(--kaiyun-primary);
        background: var(--kaiyun-primary-light);
        color: var(--kaiyun-primary-dark);
    }

    /* ===== Process steps ===== */
    .kaiyun-process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        counter-reset: step;
    }
    .kaiyun-process-step {
        background: var(--kaiyun-card);
        border-radius: var(--kaiyun-radius-lg);
        padding: 28px 24px;
        box-shadow: var(--kaiyun-shadow);
        border: 1px solid var(--kaiyun-border-light);
        text-align: left;
        position: relative;
        transition: var(--kaiyun-transition);
    }
    .kaiyun-process-step:hover {
        transform: translateY(-3px);
        box-shadow: var(--kaiyun-shadow-hover);
    }
    .kaiyun-process-step .step-number {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--kaiyun-primary-light);
        color: var(--kaiyun-primary-dark);
        font-weight: 700;
        font-size: 18px;
        border-radius: 50%;
        margin-bottom: 14px;
    }
    .kaiyun-process-step h4 {
        font-size: 17px;
        font-weight: 700;
        color: var(--kaiyun-dark);
        margin-bottom: 8px;
    }
    .kaiyun-process-step p {
        font-size: 14px;
        color: var(--kaiyun-text-muted);
        margin: 0;
        line-height: 1.7;
    }

    /* ===== FAQ ===== */
    .kaiyun-faq-list {
        max-width: 800px;
        margin: 0 auto;
    }
    .kaiyun-faq-item {
        background: var(--kaiyun-card);
        border: 1px solid var(--kaiyun-border-light);
        border-radius: var(--kaiyun-radius);
        margin-bottom: 12px;
        overflow: hidden;
        transition: var(--kaiyun-transition);
    }
    .kaiyun-faq-item:hover {
        border-color: var(--kaiyun-primary);
    }
    .kaiyun-faq-question {
        padding: 18px 22px;
        font-size: 16px;
        font-weight: 600;
        color: var(--kaiyun-dark);
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
        font-family: var(--kaiyun-font);
        transition: var(--kaiyun-transition);
    }
    .kaiyun-faq-question:hover {
        color: var(--kaiyun-primary);
    }
    .kaiyun-faq-question .faq-icon {
        flex-shrink: 0;
        width: 28px;
        height: 28px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--kaiyun-primary-light);
        color: var(--kaiyun-primary);
        border-radius: 50%;
        font-size: 14px;
        transition: transform 0.3s ease;
    }
    .kaiyun-faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .kaiyun-faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
        padding: 0 22px;
    }
    .kaiyun-faq-item.open .kaiyun-faq-answer {
        max-height: 300px;
        padding-bottom: 20px;
    }
    .kaiyun-faq-answer p {
        font-size: 14px;
        color: var(--kaiyun-text-muted);
        line-height: 1.8;
        margin: 0;
    }

    /* ===== CTA Form ===== */
    .kaiyun-cta-section {
        background: linear-gradient(135deg, #1B1F24 0%, #1E2A30 100%);
        border-radius: var(--kaiyun-radius-lg);
        padding: 56px 48px;
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .kaiyun-cta-section::after {
        content: '';
        position: absolute;
        bottom: -60px;
        right: -30px;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(40, 184, 166, 0.25) 0%, transparent 70%);
        pointer-events: none;
    }
    .kaiyun-cta-grid {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1fr 0.9fr;
        gap: 48px;
        align-items: center;
    }
    .kaiyun-cta-content h2 {
        font-size: clamp(24px, 3vw, 32px);
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
    }
    .kaiyun-cta-content p {
        font-size: 15px;
        color: #C5CDD6;
        max-width: 480px;
        line-height: 1.8;
        margin-bottom: 20px;
    }
    .kaiyun-cta-points {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }
    .kaiyun-cta-points li {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: #E8ECEF;
        background: rgba(255, 255, 255, 0.08);
        padding: 6px 14px;
        border-radius: 999px;
    }
    .kaiyun-cta-points li i {
        color: #6FE0D0;
        font-size: 12px;
    }

    .kaiyun-form-card {
        background: var(--kaiyun-card);
        border-radius: var(--kaiyun-radius-lg);
        padding: 32px;
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
    }
    .kaiyun-form-card h3 {
        font-size: 20px;
        font-weight: 700;
        color: var(--kaiyun-dark);
        margin-bottom: 20px;
    }
    .kaiyun-form-group {
        margin-bottom: 16px;
    }
    .kaiyun-form-group label {
        display: block;
        font-size: 14px;
        font-weight: 600;
        color: var(--kaiyun-text);
        margin-bottom: 6px;
    }
    .kaiyun-form-group .form-control {
        border: 1px solid var(--kaiyun-border);
        border-radius: var(--kaiyun-radius-sm);
        padding: 10px 16px;
        font-size: 14px;
        color: var(--kaiyun-text);
        font-family: var(--kaiyun-font);
        transition: var(--kaiyun-transition);
        background: var(--kaiyun-bg);
    }
    .kaiyun-form-group .form-control:focus {
        border-color: var(--kaiyun-primary);
        box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        background: #fff;
    }
    .kaiyun-form-group textarea.form-control {
        resize: vertical;
        min-height: 80px;
    }
    .kaiyun-form-submit {
        width: 100%;
        padding: 13px;
        border-radius: var(--kaiyun-radius-sm);
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        background: var(--kaiyun-primary);
        border: 1px solid var(--kaiyun-primary);
        transition: var(--kaiyun-transition);
        cursor: pointer;
        font-family: var(--kaiyun-font);
    }
    .kaiyun-form-submit:hover {
        background: var(--kaiyun-primary-dark);
        border-color: var(--kaiyun-primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(40, 184, 166, 0.35);
    }

    /* ===== Footer ===== */
    .kaiyun-footer {
        background: var(--kaiyun-darker);
        color: #A8B0B8;
        padding: 48px 0 24px;
        margin-top: 40px;
    }
    .kaiyun-footer-grid {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 32px;
    }
    .kaiyun-footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: #8A929A;
        margin: 14px 0 0;
        max-width: 340px;
    }
    .kaiyun-footer .kaiyun-logo {
        font-size: 20px;
        color: #fff;
    }
    .kaiyun-footer .kaiyun-logo:hover {
        color: #fff;
    }
    .kaiyun-footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: #E8ECEF;
        margin-bottom: 16px;
    }
    .kaiyun-footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }
    .kaiyun-footer-col ul li {
        margin-bottom: 10px;
    }
    .kaiyun-footer-col ul li a {
        font-size: 14px;
        color: #8A929A;
        transition: var(--kaiyun-transition);
    }
    .kaiyun-footer-col ul li a:hover {
        color: var(--kaiyun-primary);
        padding-left: 4px;
    }
    .kaiyun-footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 13px;
        color: #6B7480;
    }
    .kaiyun-footer-bottom a {
        color: #8A929A;
        font-size: 13px;
    }
    .kaiyun-footer-bottom a:hover {
        color: var(--kaiyun-primary);
    }

    /* ===== Responsive ===== */
    @media (max-width: 991.98px) {
        .kaiyun-case-hero .hero-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .kaiyun-case-hero {
            padding: 48px 28px;
        }
        .kaiyun-hero-stats {
            grid-template-columns: 1fr 1fr;
        }
        .kaiyun-case-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .kaiyun-stats-bar {
            grid-template-columns: repeat(2, 1fr);
        }
        .kaiyun-process-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .kaiyun-cta-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .kaiyun-cta-section {
            padding: 40px 28px;
        }
        .kaiyun-footer-grid {
            grid-template-columns: 1fr 1fr;
        }
        .kaiyun-comparison .comparison-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
    }

    @media (max-width: 767.98px) {
        .kaiyun-brand-bar {
            flex-wrap: wrap;
            gap: 12px;
        }
        .kaiyun-search-box {
            min-width: 100%;
            order: 3;
        }
        .kaiyun-brand-right {
            flex-wrap: wrap;
        }
        .kaiyun-case-grid {
            grid-template-columns: 1fr;
        }
        .kaiyun-stats-bar {
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .kaiyun-process-grid {
            grid-template-columns: 1fr;
        }
        .kaiyun-case-hero {
            padding: 36px 20px;
            border-radius: var(--kaiyun-radius);
        }
        .kaiyun-case-hero h1 {
            font-size: 28px;
        }
        .kaiyun-section {
            padding: 44px 0;
        }
        .kaiyun-comparison {
            padding: 32px 20px;
        }
        .kaiyun-cta-section {
            padding: 32px 20px;
            border-radius: var(--kaiyun-radius);
        }
        .kaiyun-form-card {
            padding: 24px 20px;
        }
        .kaiyun-footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .kaiyun-footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }

    @media (max-width: 575.98px) {
        .kaiyun-stats-bar {
            grid-template-columns: 1fr;
        }
        .kaiyun-hero-stats {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .kaiyun-case-hero h1 {
            font-size: 24px;
        }
        .kaiyun-case-hero .hero-badge {
            font-size: 12px;
        }
        .kaiyun-hero-btn-primary,
        .kaiyun-hero-btn-secondary {
            padding: 11px 20px;
            font-size: 14px;
        }
        .kaiyun-comparison-list li {
            flex-direction: column;
            align-items: flex-start;
            gap: 4px;
        }
        .kaiyun-industry-tag {
            font-size: 13px;
            padding: 8px 14px;
        }
    }

/* roulang page: category6 */
:root {
            --kaiyun-primary: #28B8A6;
            --kaiyun-primary-dark: #1F9E8F;
            --kaiyun-primary-light: #E8F7F5;
            --kaiyun-secondary: #D9A86C;
            --kaiyun-coral: #E38B6D;
            --kaiyun-dark: #1B1F24;
            --kaiyun-darker: #15181C;
            --kaiyun-bg: #F5F7F6;
            --kaiyun-card: #FFFFFF;
            --kaiyun-text: #2A3038;
            --kaiyun-text-muted: #6B7480;
            --kaiyun-text-light: #A8B0B8;
            --kaiyun-border: #D9DEE3;
            --kaiyun-border-light: #E8ECEF;
            --kaiyun-radius-sm: 8px;
            --kaiyun-radius: 12px;
            --kaiyun-radius-lg: 16px;
            --kaiyun-shadow: 0 8px 24px rgba(27, 31, 36, 0.06);
            --kaiyun-shadow-hover: 0 12px 32px rgba(27, 31, 36, 0.12);
            --kaiyun-transition: all 0.2s ease;
            --kaiyun-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --kaiyun-number-font: 'Roboto', 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--kaiyun-font);
            font-size: 16px;
            line-height: 1.8;
            color: var(--kaiyun-text);
            background-color: var(--kaiyun-bg);
            overflow-x: hidden;
        }

        a {
            color: var(--kaiyun-primary);
            text-decoration: none;
            transition: var(--kaiyun-transition);
        }

        a:hover {
            color: var(--kaiyun-primary-dark);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(40, 184, 166, 0.4);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 576px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .kaiyun-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--kaiyun-card);
            box-shadow: 0 2px 12px rgba(27, 31, 36, 0.06);
            border-bottom: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }

        .kaiyun-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .kaiyun-logo:hover {
            color: var(--kaiyun-dark);
        }

        .kaiyun-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-brand-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .kaiyun-search-box {
            display: flex;
            align-items: center;
            background: var(--kaiyun-bg);
            border: 1px solid var(--kaiyun-border);
            border-radius: 999px;
            padding: 6px 16px;
            gap: 8px;
            min-width: 220px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-search-box:focus-within {
            border-color: var(--kaiyun-primary);
            box-shadow: 0 0 0 3px rgba(40, 184, 166, 0.15);
        }

        .kaiyun-search-box i {
            color: var(--kaiyun-text-muted);
            font-size: 14px;
        }

        .kaiyun-search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--kaiyun-text);
            width: 100%;
            font-family: var(--kaiyun-font);
        }

        .kaiyun-search-box input::placeholder {
            color: var(--kaiyun-text-light);
        }

        .kaiyun-login-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
            background: transparent;
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
        }

        .kaiyun-login-btn:hover {
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-primary-btn-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            white-space: nowrap;
            cursor: pointer;
        }

        .kaiyun-primary-btn-sm:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(40, 184, 166, 0.3);
        }

        .kaiyun-channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            border-top: 1px solid var(--kaiyun-border-light);
            flex-wrap: nowrap;
        }

        .kaiyun-channel-row::-webkit-scrollbar {
            display: none;
        }

        .kaiyun-channel-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-text-muted);
            white-space: nowrap;
            transition: var(--kaiyun-transition);
            border: 1px solid transparent;
        }

        .kaiyun-channel-link:hover {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-channel-link.active {
            color: #fff;
            background: var(--kaiyun-primary);
            border-color: var(--kaiyun-primary);
            font-weight: 700;
        }

        .kaiyun-channel-link i {
            font-size: 13px;
        }

        /* ===== Hero / Banner ===== */
        .kaiyun-help-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            padding: 88px 0 72px;
            overflow: hidden;
        }

        .kaiyun-help-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(21, 24, 28, 0.82) 0%, rgba(27, 31, 36, 0.68) 100%);
            z-index: 1;
        }

        .kaiyun-help-hero .container {
            position: relative;
            z-index: 2;
        }

        .kaiyun-help-hero-content {
            max-width: 720px;
        }

        .kaiyun-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(40, 184, 166, 0.18);
            border: 1px solid rgba(40, 184, 166, 0.45);
            border-radius: 999px;
            color: #A8E8DF;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .kaiyun-help-hero h1 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .kaiyun-help-hero .lead {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 620px;
        }

        .kaiyun-hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .kaiyun-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            background: var(--kaiyun-primary);
            border: 1px solid var(--kaiyun-primary);
            transition: var(--kaiyun-transition);
            cursor: pointer;
        }

        .kaiyun-btn-primary:hover {
            background: var(--kaiyun-primary-dark);
            border-color: var(--kaiyun-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(40, 184, 166, 0.35);
        }

        .kaiyun-btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.5);
            transition: var(--kaiyun-transition);
            cursor: pointer;
        }

        .kaiyun-btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .kaiyun-hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .kaiyun-hero-stat {
            text-align: left;
        }

        .kaiyun-hero-stat .stat-value {
            font-family: var(--kaiyun-number-font);
            font-size: 28px;
            font-weight: 700;
            color: var(--kaiyun-primary);
            line-height: 1.2;
        }

        .kaiyun-hero-stat .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .kaiyun-help-hero {
                padding: 56px 0 48px;
            }
            .kaiyun-help-hero h1 {
                font-size: 28px;
            }
            .kaiyun-hero-stats {
                gap: 20px;
            }
        }

        @media (max-width: 576px) {
            .kaiyun-help-hero h1 {
                font-size: 24px;
            }
            .kaiyun-btn-primary,
            .kaiyun-btn-outline-light {
                padding: 12px 20px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .kaiyun-hero-actions {
                flex-direction: column;
            }
        }

        /* ===== Section Common ===== */
        .kaiyun-section {
            padding: 80px 0;
        }

        .kaiyun-section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--kaiyun-dark);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .kaiyun-section-subtitle {
            font-size: 16px;
            color: var(--kaiyun-text-muted);
            line-height: 1.75;
            margin-bottom: 36px;
            max-width: 680px;
        }

        @media (max-width: 768px) {
            .kaiyun-section {
                padding: 56px 0;
            }
            .kaiyun-section-title {
                font-size: 24px;
            }
        }

        /* ===== Help Category Cards ===== */
        .kaiyun-help-category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .kaiyun-help-category-card {
            background: var(--kaiyun-card);
            border-radius: var(--kaiyun-radius-lg);
            padding: 28px 24px;
            box-shadow: var(--kaiyun-shadow);
            border: 1px solid var(--kaiyun-border-light);
            transition: var(--kaiyun-transition);
            position: relative;
            overflow: hidden;
        }

        .kaiyun-help-category-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--kaiyun-primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }

        .kaiyun-help-category-card:hover {
            box-shadow: var(--kaiyun-shadow-hover);
            transform: translateY(-4px);
        }

        .kaiyun-help-category-card:hover::after {
            transform: scaleX(1);
        }

        .kaiyun-help-category-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--kaiyun-primary-light);
            color: var(--kaiyun-primary);
            border-radius: 12px;
            font-size: 20px;
            margin-bottom: 16px;
        }

        .kaiyun-help-category-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            margin-bottom: 8px;
        }

        .kaiyun-help-category-card p {
            font-size: 14px;
            color: var(--kaiyun-text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .kaiyun-help-category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--kaiyun-primary);
        }

        .kaiyun-help-category-card .card-link:hover {
            color: var(--kaiyun-primary-dark);
            gap: 10px;
        }

        @media (max-width: 992px) {
            .kaiyun-help-category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .kaiyun-help-category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Guide Steps ===== */
        .kaiyun-guide-section {
            background: var(--kaiyun-dark);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .kaiyun-guide-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(40, 184, 166, 0.08);
            pointer-events: none;
        }

        .kaiyun-guide-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(217, 168, 108, 0.06);
            pointer-events: none;
        }

        .kaiyun-guide-section .container {
            position: relative;
            z-index: 1;
        }

        .kaiyun-guide-section .kaiyun-section-title {
            color: #fff;
        }

        .kaiyun-guide-section .kaiyun-section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }

        .kaiyun-steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

        .kaiyun-step-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--kaiyun-radius-lg);
            padding: 24px 20px;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-step-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }

        .kaiyun-step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--kaiyun-primary);
            color: #fff;
            border-radius: 50%;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 14px;
            font-family: var(--kaiyun-number-font);
        }

        .kaiyun-step-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .kaiyun-step-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media (max-width: 992px) {
            .kaiyun-steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 576px) {
            .kaiyun-steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .kaiyun-faq-section {
            background: var(--kaiyun-bg);
        }

        .kaiyun-accordion .accordion-item {
            border: 1px solid var(--kaiyun-border-light);
            border-radius: var(--kaiyun-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(27, 31, 36, 0.04);
            background: var(--kaiyun-card);
        }

        .kaiyun-accordion .accordion-button {
            font-size: 16px;
            font-weight: 700;
            color: var(--kaiyun-dark);
            background: var(--kaiyun-card);
            padding: 18px 24px;
            border: none;
            box-shadow: none;
            transition: var(--kaiyun-transition);
        }

        .kaiyun-accordion .accordion-button:not(.collapsed) {
            color: var(--kaiyun-primary);
            background: var(--kaiyun-primary-light);
        }

        .kaiyun-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--kaiyun-primary);
        }

        .kaiyun-accordion .accordion-button::after {
            background-size: 16px;
            transition: transform 0.3s ease;
        }

        .kaiyun-accordion .accordion-body {
            font-size: 15px;
            color: var(--kaiyun-text-muted);
            line-height: 1.8;
            padding: 16px 24px 20px;
        }

        /* ===== CTA Section ===== */
        .kaiyun-cta-section {
            padding: 72px 0;
            background: var(--kaiyun-card);
            border-top: 1px solid var(--kaiyun-border-light);
        }

        .kaiyun-cta-panel {
            background: linear-gradient(135deg, var(--kaiyun-dark) 0%, var(--kaiyun-darker) 100%);
            border-radius: var(--kaiyun-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }

        .kaiyun-cta-panel::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(40, 184, 166, 0.15);
            pointer-events: none;
        }

        .kaiyun-cta-panel-content {
            position: relative;
            z-index: 1;
            max-width: 520px;
        }

        .kaiyun-cta-panel h3 {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }

        .kaiyun-cta-panel p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .kaiyun-cta-panel .kaiyun-btn-primary {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .kaiyun-cta-panel {
                flex-direction: column;
                text-align: center;
                padding: 36px 24px;
            }
            .kaiyun-cta-panel h3 {
                font-size: 20px;
            }
        }

        /* ===== Footer ===== */
        .kaiyun-footer {
            background: var(--kaiyun-darker);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }

        .kaiyun-footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .kaiyun-footer-brand .kaiyun-logo {
            color: #fff;
            margin-bottom: 16px;
        }

        .kaiyun-footer-brand .kaiyun-logo span {
            color: var(--kaiyun-primary);
        }

        .kaiyun-footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .kaiyun-footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .kaiyun-footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .kaiyun-footer-col ul li {
            margin-bottom: 10px;
        }

        .kaiyun-footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--kaiyun-transition);
        }

        .kaiyun-footer-col ul li a:hover {
            color: var(--kaiyun-primary);
        }

        .kaiyun-footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .kaiyun-footer-bottom p {
            margin-bottom: 6px;
        }

        .kaiyun-footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .kaiyun-footer-bottom a:hover {
            color: var(--kaiyun-primary);
        }

        @media (max-width: 992px) {
            .kaiyun-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .kaiyun-footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 576px) {
            .kaiyun-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .kaiyun-footer-brand {
                grid-column: span 1;
            }
            .kaiyun-brand-bar {
                flex-direction: column;
                align-items: stretch;
            }
            .kaiyun-brand-right {
                flex-wrap: wrap;
            }
            .kaiyun-search-box {
                min-width: 100%;
            }
        }