/* roulang page: index */
:root {
            --bg-base: #060B18;
            --bg-card: rgba(13, 22, 45, 0.7);
            --bg-card-hover: rgba(20, 35, 71, 0.85);
            --border-glow: rgba(0, 210, 255, 0.2);
            --border-highlight: rgba(0, 210, 255, 0.6);
            --primary: #00D2FF;
            --primary-hover: #1890FF;
            --accent-green: #00F5A0;
            --accent-orange: #FF7D00;
            --text-main: #FFFFFF;
            --text-sub: #A0AEC0;
            --text-muted: #718096;
            --font-code: "JetBrains Mono", Menlo, Consolas, monospace;
            --radius-md: 12px;
            --radius-lg: 18px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
        }

        body {
            background: radial-gradient(circle at 50% 0%, #0c1836 0%, #060B18 70%);
            min-height: 100vh;
            line-height: 1.6;
            overflow-x: hidden;
        }

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

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

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部通栏 */
        .top-bar {
            background: rgba(4, 8, 18, 0.85);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-sub);
            padding: 8px 0;
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            box-shadow: 0 0 10px var(--accent-green);
        }

        /* 导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(6, 11, 24, 0.88);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-glow);
        }
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), #0051ff);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 900;
            font-size: 18px;
            box-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
        }
        .nav-links {
            display: flex;
            gap: 28px;
            list-style: none;
        }
        .nav-links a {
            color: var(--text-sub);
            font-size: 15px;
            font-weight: 500;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), #0077ff);
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
        }
        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(0, 210, 255, 0.6);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: rgba(0, 210, 255, 0.05);
            border-color: var(--border-glow);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(0, 210, 255, 0.15);
            border-color: var(--border-highlight);
        }

        /* 通用 Section */
        section {
            padding: 90px 0;
            position: relative;
        }
        .section-dark {
            background: rgba(4, 8, 20, 0.7);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
        }
        .section-header {
            margin-bottom: 50px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .section-desc {
            color: var(--text-sub);
            font-size: 16px;
            max-width: 780px;
            line-height: 1.7;
        }
        .section-tag {
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            display: inline-block;
        }

        /* 1. Hero 板块 */
        .hero {
            position: relative;
            padding: 110px 0 90px 0;
            background: url('/assets/images/be77360b8edfcaf1.png') center/cover no-repeat;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6,11,24,0.75) 0%, rgba(6,11,24,0.95) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }
        .hero-title {
            font-size: 44px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(180deg, #FFFFFF 0%, #B8DCFF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 17px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 40px;
        }
        .search-box-wrap {
            max-width: 640px;
            margin: 0 auto 24px auto;
            display: flex;
            background: rgba(13, 22, 45, 0.8);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glow);
            border-radius: 12px;
            padding: 6px;
        }
        .search-input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            padding: 12px 18px;
            color: #fff;
            font-size: 15px;
        }
        .search-input::placeholder {
            color: var(--text-muted);
        }
        .chips-list {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .chip {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-sub);
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
            transition: var(--transition);
        }
        .chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 210, 255, 0.08);
        }

        /* 2. 核心架构与参数 */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .param-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-glow);
        }
        .param-table th, .param-table td {
            padding: 14px 20px;
            text-align: left;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 14px;
        }
        .param-table th {
            color: var(--text-muted);
            background: rgba(0, 0, 0, 0.2);
            font-weight: 500;
        }
        .param-table td {
            color: var(--text-main);
        }
        .badge-green {
            color: var(--accent-green);
            background: rgba(0, 245, 160, 0.1);
            padding: 4px 8px;
            border-radius: 4px;
            font-family: var(--font-code);
            font-size: 12px;
        }

        /* 3. 核心优势 6卡片 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 30px;
            transition: var(--transition);
            position: relative;
        }
        .card:hover {
            transform: translateY(-5px);
            border-color: var(--border-highlight);
            background: var(--bg-card-hover);
            box-shadow: 0 10px 30px rgba(0, 210, 255, 0.15);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(0, 210, 255, 0.1);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
        }
        .card-text {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.65;
        }

        /* 4. 产品矩阵 3列对比 */
        .product-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .product-card.featured {
            border-color: var(--primary);
            background: linear-gradient(180deg, rgba(20, 45, 90, 0.8) 0%, rgba(13, 22, 45, 0.8) 100%);
            box-shadow: 0 0 35px rgba(0, 210, 255, 0.2);
        }
        .product-feature-list {
            list-style: none;
            margin: 24px 0 30px 0;
        }
        .product-feature-list li {
            padding: 8px 0;
            color: var(--text-sub);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .product-feature-list li::before {
            content: '✓';
            color: var(--accent-green);
            font-weight: 900;
        }

        /* 5. 链路展示区 */
        .pipeline-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            position: relative;
        }
        .flow-step {
            background: rgba(13, 22, 45, 0.6);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
        }
        .flow-num {
            font-family: var(--font-code);
            color: var(--primary);
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        /* 6. 场景 4列 */
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        /* 7. 代码与数据流演示 */
        .code-window {
            background: #040814;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glow);
            overflow: hidden;
            font-family: var(--font-code);
        }
        .code-header {
            background: rgba(255, 255, 255, 0.04);
            padding: 12px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .code-dots {
            display: flex;
            gap: 6px;
        }
        .code-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
        }
        .code-content {
            padding: 20px;
            font-size: 13px;
            color: #d1d5db;
            overflow-x: auto;
            line-height: 1.6;
        }
        .token-keyword { color: #ff7b72; }
        .token-function { color: #d2a8ff; }
        .token-string { color: #a5d6ff; }
        .token-comment { color: #8b949e; }

        .stream-feed {
            background: #040814;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-glow);
            padding: 20px;
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .stream-item {
            background: rgba(13, 22, 45, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-left: 3px solid var(--accent-green);
            padding: 12px 16px;
            border-radius: 6px;
            font-size: 13px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 8. 案例对比 */
        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .case-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .case-body {
            padding: 24px;
        }
        .metric-badge {
            display: inline-block;
            background: rgba(0, 210, 255, 0.1);
            color: var(--primary);
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 6px;
            font-size: 13px;
            margin-top: 12px;
        }

        /* 9. 量化指标条 */
        .metrics-bar {
            background: linear-gradient(90deg, rgba(0,210,255,0.08) 0%, rgba(24,144,255,0.15) 50%, rgba(0,210,255,0.08) 100%);
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
            padding: 45px 0;
        }
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .metric-number {
            font-size: 40px;
            font-weight: 800;
            font-family: var(--font-code);
            color: #fff;
            margin-bottom: 6px;
            text-shadow: 0 0 20px rgba(0, 210, 255, 0.5);
        }
        .metric-label {
            font-size: 14px;
            color: var(--text-sub);
        }

        /* 10. 口碑评价 */
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .author-info {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(0, 210, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            border: 1px solid var(--border-glow);
        }

        /* 11. 资讯动态 */
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }
        .news-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .news-card img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }
        .news-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        /* 12. FAQ */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        details {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        details[open] {
            border-color: var(--primary);
            background: var(--bg-card-hover);
        }
        summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        summary::-webkit-details-marker {
            display: none;
        }
        summary::after {
            content: '+';
            font-size: 20px;
            color: var(--primary);
            transition: transform 0.3s;
        }
        details[open] summary::after {
            content: '−';
        }
        .faq-answer {
            padding: 0 24px 20px 24px;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 16px;
        }

        /* 13. 底部收口 CTA */
        .cta-box {
            background: radial-gradient(circle at 50% 50%, rgba(0, 140, 255, 0.25) 0%, rgba(6, 11, 24, 0.9) 100%), var(--bg-card);
            border: 1px solid var(--border-highlight);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            box-shadow: 0 0 50px rgba(0, 210, 255, 0.15);
        }

        /* 页脚 */
        footer {
            background: #03060d;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 70px 0 30px 0;
            color: var(--text-sub);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .pipeline-flow { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hero-title { font-size: 32px; }
            .grid-2, .grid-3, .grid-4, .pipeline-flow { grid-template-columns: 1fr; }
            .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
            section { padding: 60px 0; }
        }