/* roulang page: index */
:root {
            --bg-dark: #0A0D14;
            --bg-card: #121824;
            --bg-card-hover: #1A2234;
            --bg-light: #F8FAFC;
            --primary-cyan: #00F2FE;
            --primary-blue: #4FACFE;
            --accent-purple: #7000FF;
            --accent-green: #10B981;
            --accent-amber: #F59E0B;
            --text-main: #F8FAFC;
            --text-muted: #94A3B8;
            --text-dark: #0F172A;
            --text-dark-muted: #475569;
            --border-dark: rgba(255, 255, 255, 0.08);
            --border-light: rgba(15, 23, 42, 0.08);
            --shadow-glow: 0 10px 30px -10px rgba(0, 242, 254, 0.25);
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 90px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        /* 顶部通告与导航 */
        .top-notice-bar {
            background: linear-gradient(90deg, #101726 0%, #1a103c 100%);
            border-bottom: 1px solid var(--border-dark);
            font-size: 0.8125rem;
            color: #CBD5E1;
            padding: 6px 0;
        }

        .navbar-custom {
            backdrop-filter: blur(16px);
            background: rgba(10, 13, 20, 0.75);
            border-bottom: 1px solid var(--border-dark);
            transition: var(--transition-smooth);
        }

        .navbar-custom.scrolled {
            background: rgba(10, 13, 20, 0.96);
            box-shadow: 0 4px 20px rgba(0,0,0,0.5);
        }

        .brand-logo {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
        }

        .nav-link {
            color: var(--text-muted) !important;
            font-weight: 500;
            font-size: 0.9375rem;
            padding: 8px 16px !important;
            transition: var(--transition-smooth);
        }

        .nav-link:hover {
            color: var(--primary-cyan) !important;
        }

        /* 基础与排版 */
        h1, h2, h3, h4, h5, h6 {
            color: #FFFFFF;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            background: rgba(0, 242, 254, 0.1);
            border: 1px solid rgba(0, 242, 254, 0.3);
            color: var(--primary-cyan);
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 600;
            text-transform: uppercase;
            margin-bottom: 1rem;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.0625rem;
            max-width: 680px;
            margin: 0 auto;
        }

        .section-padding {
            padding: 90px 0;
            position: relative;
        }

        .bg-surface-alt {
            background-color: #0E131F;
            border-top: 1px solid var(--border-dark);
            border-bottom: 1px solid var(--border-dark);
        }

        /* 按钮与卡片系统 */
        .btn-gradient {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            color: #050B14 !important;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            border: none;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-gradient:hover {
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
            color: #000 !important;
        }

        .btn-outline-custom {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-dark);
            color: #FFFFFF !important;
            font-weight: 500;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            transition: var(--transition-smooth);
        }

        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--primary-cyan) !important;
        }

        .custom-card {
            background: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 2rem;
            height: 100%;
            transition: var(--transition-smooth);
        }

        .custom-card:hover {
            border-color: rgba(0, 242, 254, 0.3);
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }

        /* 首屏 Hero Carousel */
        .hero-section {
            padding: 140px 0 80px;
            background: radial-gradient(circle at 50% 20%, rgba(112, 0, 255, 0.15) 0%, rgba(10, 13, 20, 1) 70%), url('/assets/images/166c662d4fe1d512.jpg') center/cover no-repeat;
            position: relative;
        }

        .hero-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(10, 13, 20, 0.88);
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-dashboard-mockup {
            background: rgba(18, 24, 36, 0.85);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 242, 254, 0.2);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: 0 20px 50px rgba(0,0,0,0.6);
        }

        /* 矩阵对比表 */
        .comparison-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .comparison-table th, .comparison-table td {
            padding: 1.2rem;
            border-bottom: 1px solid var(--border-dark);
            text-align: center;
        }

        .comparison-table th:first-child, .comparison-table td:first-child {
            text-align: left;
            padding-left: 1.5rem;
        }

        .comparison-table th {
            background-color: #161D2C;
            font-weight: 600;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table .highlight-col {
            background: rgba(0, 242, 254, 0.05);
            color: var(--primary-cyan);
            font-weight: 600;
        }

        /* FAQ 手风琴重塑 */
        .accordion-item {
            background-color: var(--bg-card);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md) !important;
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .accordion-button {
            background-color: var(--bg-card);
            color: #FFFFFF;
            font-weight: 600;
            padding: 1.25rem 1.5rem;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            background-color: #171E2D;
            color: var(--primary-cyan);
        }

        .accordion-button::after {
            filter: invert(1);
        }

        .accordion-body {
            color: var(--text-muted);
            padding: 1.5rem;
            background-color: #121824;
            border-top: 1px solid var(--border-dark);
        }

        /* 移动端固定浮动转化条 */
        .mobile-floating-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(10, 13, 20, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--border-dark);
            padding: 10px 16px;
            z-index: 1050;
            display: none;
        }

        @media (max-width: 768px) {
            .mobile-floating-cta {
                display: flex;
                align-items: center;
                justify-content: space-between;
                gap: 12px;
            }
            .section-padding {
                padding: 60px 0;
            }
            .hero-section {
                padding: 110px 0 60px;
            }
        }