/* roulang page: index */
:root {
            --primary: #00B86B;
            --primary-dark: #009657;
            --primary-light: #E6F8F0;
            --secondary: #121820;
            --dark-block: #0B1015;
            --danger: #FF4D4F;
            --warning: #FAAD14;
            --text-main: #1D2129;
            --text-muted: #646A73;
            --border: #E3EBE6;
            --bg-page: #F7FAF8;
            --white: #FFFFFF;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 12px 30px rgba(0, 184, 107, 0.14);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.75;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部微型工具栏 */
        .top-toolbar {
            background-color: #070B0E;
            color: #8C949E;
            font-size: 13px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 8px 0;
        }

        .top-toolbar-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;
            background-color: var(--primary);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--primary);
            animation: pulse 1.8s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.85); }
        }

        /* 主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-logo-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), #009657);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 16px;
            font-weight: 900;
        }

        .nav-list {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 6px 0;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
            text-align: center;
            line-height: 1;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #FFF;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 184, 107, 0.28);
        }

        .btn-outline {
            background-color: transparent;
            border-color: var(--border);
            color: var(--text-main);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* 移动端菜单切换 */
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--secondary);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 板块公用 */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            background-color: var(--primary-light);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
        }

        .section-header {
            margin-bottom: 48px;
        }

        .section-header.center {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. 斜切 Hero 首屏 */
        .hero-section {
            position: relative;
            background-color: #070B0E;
            color: #FFF;
            padding: 100px 0 140px;
            overflow: hidden;
        }

        .hero-bg-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('/assets/images/How-Big-Data-Analytics-is-Changing-Sports.png');
            background-size: cover;
            background-position: center;
            opacity: 0.22;
        }

        .hero-slant {
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            height: 60px;
            background-color: var(--bg-page);
            clip-path: polygon(0 100%, 100% 0, 100% 100%);
            z-index: 2;
        }

        .hero-grid {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 50px;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero-content h1 span {
            color: var(--primary);
        }

        .hero-intro {
            font-size: 16px;
            line-height: 1.8;
            color: #C0C8D1;
            margin-bottom: 32px;
            max-width: 620px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            align-items: center;
        }

        .live-board-mockup {
            background: rgba(18, 24, 32, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(8px);
        }

        .mockup-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding-bottom: 14px;
            margin-bottom: 18px;
        }

        .live-tag {
            background-color: var(--danger);
            color: #FFF;
            font-size: 12px;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 4px;
            animation: pulse 1.5s infinite;
        }

        .mockup-match-item {
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-sm);
            padding: 14px;
            margin-bottom: 12px;
            border-left: 3px solid var(--primary);
        }

        .match-league {
            font-size: 12px;
            color: #8C949E;
            margin-bottom: 6px;
            display: flex;
            justify-content: space-between;
        }

        .match-score-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 15px;
            font-weight: 700;
        }

        .match-score {
            font-size: 18px;
            color: var(--primary);
        }

        /* 2. KPI 看板与架构技术指标 */
        .kpi-section {
            padding: 40px 0 80px;
        }

        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: #FFF;
            padding: 36px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .kpi-item {
            text-align: center;
            border-right: 1px solid var(--border);
        }

        .kpi-item:last-child {
            border-right: none;
        }

        .kpi-value {
            font-size: 40px;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.1;
            margin-bottom: 8px;
            font-family: Arial, sans-serif;
        }

        .kpi-value span {
            color: var(--primary);
            font-size: 24px;
        }

        .kpi-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 3. 系统架构概览 */
        .architecture-section {
            background-color: #FFF;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .arch-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .arch-img-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .tech-spec-list {
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .tech-spec-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .spec-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--primary);
            margin-top: 8px;
            flex-shrink: 0;
        }

        /* 4. 核心优势六卡片 (2x3) */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: #FFF;
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .feature-icon-box {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .feature-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .feature-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 5. 热门终端系列 (3卡片) */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .solution-card {
            background: #FFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 36px 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            box-shadow: var(--shadow-sm);
        }

        .solution-card.featured {
            border: 2px solid var(--primary);
        }

        .solution-badge {
            position: absolute;
            top: -12px;
            right: 24px;
            background: var(--primary);
            color: #FFF;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 12px;
        }

        .solution-head h3 {
            font-size: 22px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--secondary);
        }

        .solution-params {
            list-style: none;
            margin: 24px 0 32px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .solution-params li {
            font-size: 14px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-params li::before {
            content: "✓";
            color: var(--primary);
            font-weight: 800;
        }

        /* 6. 深色实时引擎体验区 */
        .dark-engine-section {
            background-color: var(--dark-block);
            color: #FFF;
            padding: 90px 0;
            overflow: hidden;
        }

        .engine-stream-box {
            background: #06090D;
            border: 1px solid #1A232D;
            border-radius: var(--radius-md);
            padding: 24px;
            font-family: Consolas, "Courier New", monospace;
            font-size: 13px;
            color: #7FE5A9;
            box-shadow: 0 16px 36px rgba(0,0,0,0.6);
            height: 320px;
            overflow-y: auto;
            line-height: 1.6;
        }

        .engine-stream-line {
            margin-bottom: 8px;
            display: flex;
            gap: 12px;
        }

        .stream-time {
            color: #556272;
        }

        .stream-event {
            color: #FAAD14;
        }

        /* 7. 运营场景演示 (社会认同) */
        .scene-card {
            background: #FFF;
            border-radius: var(--radius-md);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            margin-bottom: 32px;
        }

        .scene-content {
            padding: 44px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .scene-metrics-row {
            display: flex;
            gap: 28px;
            margin-top: 24px;
            border-top: 1px solid var(--border);
            padding-top: 20px;
        }

        .metric-cell strong {
            display: block;
            font-size: 22px;
            color: var(--primary);
        }

        .metric-cell span {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 8. 真实评价区 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .review-card {
            background: #FFF;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 30px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .reviewer-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .reviewer-avatar {
            width: 44px;
            height: 44px;
            background-color: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .reviewer-detail h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--secondary);
        }

        .reviewer-detail p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 9. 横向对比矩阵 */
        .table-responsive {
            overflow-x: auto;
            background: #FFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 14px;
        }

        .compare-table th, .compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border);
        }

        .compare-table th {
            background: #FAFCFA;
            font-size: 15px;
            font-weight: 700;
            color: var(--secondary);
        }

        .compare-table td.highlight {
            background-color: #F2FAF5;
            color: var(--primary-dark);
            font-weight: 700;
        }

        /* 10. 资讯要闻内嵌 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: #FFF;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .news-img {
            height: 190px;
            overflow: hidden;
        }

        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .news-card:hover .news-img img {
            transform: scale(1.05);
        }

        .news-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .news-meta {
            font-size: 12px;
            color: #8C949E;
            margin-bottom: 8px;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-snippet {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
            flex: 1;
        }

        /* 11. FAQ 原生手风琴 */
        .accordion-group {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 900px;
            margin: 0 auto;
        }

        .accordion-item {
            background: #FFF;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        details summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--secondary);
            cursor: pointer;
            list-style: none;
            position: relative;
            transition: var(--transition);
        }

        details summary::-webkit-details-marker {
            display: none;
        }

        details summary::after {
            content: "+";
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            font-weight: 400;
            color: var(--text-muted);
            transition: var(--transition);
        }

        details[open] summary::after {
            transform: translateY(-50%) rotate(45deg);
            color: var(--primary);
        }

        .accordion-content {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            border-top: 1px solid #F0F4F2;
            padding-top: 14px;
        }

        /* 12. 服务保障条 */
        .guarantee-band {
            background-color: #FFF;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 50px 0;
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .guarantee-badge {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
            flex-shrink: 0;
        }

        .guarantee-text h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 4px;
        }

        .guarantee-text p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 13. 底部部署表单 CTA */
        .bottom-cta-section {
            background: linear-gradient(135deg, #070B0E, #121820);
            color: #FFF;
            text-align: center;
            padding: 90px 0;
        }

        .cta-form-box {
            max-width: 620px;
            margin: 36px auto 0;
            display: flex;
            gap: 12px;
        }

        .cta-input {
            flex: 1;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            color: #FFF;
            font-size: 15px;
            outline: none;
            transition: var(--transition);
        }

        .cta-input:focus {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.12);
        }

        /* 底部固定转化条 */
        .fixed-action-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(18, 24, 32, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 12px 0;
            z-index: 999;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.25);
        }

        .fixed-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .fixed-bar-text {
            color: #FFF;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* 统一页脚 */
        .site-footer {
            background-color: #070B0E;
            color: #8C949E;
            padding: 70px 0 100px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand h4 {
            color: #FFF;
            font-size: 18px;
            margin-bottom: 16px;
        }

        .footer-col h5 {
            color: #FFF;
            font-size: 15px;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid, .arch-grid, .scene-card {
                grid-template-columns: 1fr;
            }
            .features-grid, .solutions-grid, .news-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kpi-grid, .guarantee-grid, .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .kpi-item:nth-child(2) {
                border-right: none;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .top-toolbar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-list {
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFF;
                flex-direction: column;
                padding: 24px;
                gap: 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                display: none;
            }
            .nav-list.active {
                display: flex;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 24px;
            }
            .features-grid, .solutions-grid, .news-grid, .reviews-grid, .kpi-grid, .guarantee-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .kpi-item {
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding-bottom: 16px;
            }
            .kpi-item:last-child {
                border-bottom: none;
                padding-bottom: 0;
            }
            .cta-form-box {
                flex-direction: column;
            }
            .fixed-bar-inner {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            .fixed-bar-text {
                font-size: 12px;
            }
        }