/* roulang page: index */
:root {
            --primary: #0F172A;
            --primary-light: #1E293B;
            --brand-cyan: #0EA5E9;
            --brand-teal: #00D2B4;
            --accent-green: #10B981;
            --accent-amber: #F59E0B;
            --bg-light: #F8FAFC;
            --bg-card: #FFFFFF;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 12px 30px -4px rgba(14, 165, 233, 0.15);
            --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;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.65;
            overflow-x: hidden;
        }

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

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

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部信息条 */
        .top-bar {
            background-color: #070B14;
            color: #94A3B8;
            font-size: 13px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-status {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            background-color: var(--brand-teal);
            border-radius: 50%;
            display: inline-block;
            box-shadow: 0 0 8px var(--brand-teal);
        }

        /* 主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }
        .logo {
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--brand-cyan);
        }
        .nav-menu {
            display: flex;
            list-style: none;
            gap: 28px;
            align-items: center;
        }
        .nav-link {
            color: #CBD5E1;
            font-size: 15px;
            font-weight: 500;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--brand-teal);
        }
        .btn-header {
            background: linear-gradient(135deg, var(--brand-cyan), var(--brand-teal));
            color: #FFFFFF;
            padding: 10px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 14px;
            box-shadow: 0 4px 14px rgba(14, 165, 233, 0.35);
        }
        .btn-header:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 210, 180, 0.45);
        }

        /* 通用板块样式 */
        .section-padding {
            padding: 90px 0;
        }
        .section-header {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 56px;
        }
        .section-badge {
            display: inline-block;
            background: rgba(14, 165, 233, 0.12);
            color: var(--brand-cyan);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. Hero 试用申请蓝图 */
        #hero {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(7, 11, 20, 0.98)), url('/assets/images/18a33089634e7d50.webp') center/cover no-repeat;
            color: #FFFFFF;
            padding: 100px 0 110px;
            position: relative;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 42px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
        }
        .hero-content h1 span {
            background: linear-gradient(90deg, #38BDF8, #2DD4BF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 16px;
            color: #94A3B8;
            line-height: 1.75;
            margin-bottom: 32px;
        }
        .hero-badges-row {
            display: flex;
            gap: 16px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .hero-badge-item {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 13px;
            color: #E2E8F0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-card-panel {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(16px);
            padding: 36px;
            border-radius: var(--radius-lg);
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }
        .hero-card-panel h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: #FFFFFF;
        }
        .hero-card-panel p {
            font-size: 14px;
            color: #94A3B8;
            margin-bottom: 24px;
        }
        .hero-form-group {
            margin-bottom: 16px;
        }
        .hero-input {
            width: 100%;
            padding: 14px 16px;
            background: rgba(15, 23, 42, 0.8);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            color: #FFF;
            font-size: 14px;
            outline: none;
        }
        .hero-input:focus {
            border-color: var(--brand-cyan);
        }
        .btn-submit {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, var(--brand-cyan), var(--brand-teal));
            color: #FFF;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-submit:hover {
            opacity: 0.95;
            box-shadow: 0 6px 18px rgba(14, 165, 233, 0.4);
        }

        /* 2. 平台架构与链路介绍 */
        #intro {
            background-color: #FFFFFF;
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .intro-features-list {
            list-style: none;
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .intro-features-list li {
            position: relative;
            padding-left: 28px;
            font-size: 15px;
            color: var(--text-muted);
        }
        .intro-features-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--brand-teal);
            font-weight: bold;
        }

        /* 3. 核心功能亮点网格 */
        #features {
            background-color: var(--bg-light);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-5px);
            border-color: var(--brand-cyan);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon-box {
            width: 48px;
            height: 48px;
            background: rgba(14, 165, 233, 0.1);
            color: var(--brand-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 20px;
            font-weight: bold;
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 19px;
            margin-bottom: 12px;
            color: var(--primary);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 4. 热门标签引擎矩阵 */
        #products {
            background-color: #FFFFFF;
        }
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .product-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }
        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .product-thumb {
            height: 190px;
            overflow: hidden;
        }
        .product-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-thumb img {
            transform: scale(1.05);
        }
        .product-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .product-tag {
            font-size: 12px;
            color: var(--brand-teal);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .product-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .product-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex: 1;
        }
        .product-link {
            color: var(--brand-cyan);
            font-size: 14px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 5. 沉浸式深度解决方案 */
        #solution {
            background: linear-gradient(135deg, #0B1120 0%, #0F172A 100%);
            color: #FFFFFF;
        }
        #solution .section-title {
            color: #FFFFFF;
        }
        #solution .section-desc {
            color: #94A3B8;
        }
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .solution-item {
            background: rgba(30, 41, 59, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: var(--transition);
        }
        .solution-item:hover {
            background: rgba(30, 41, 59, 0.9);
            border-color: var(--brand-teal);
        }
        .solution-metric {
            font-size: 28px;
            font-weight: 800;
            color: var(--brand-teal);
            margin-bottom: 8px;
        }
        .solution-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .solution-detail {
            font-size: 13px;
            color: #94A3B8;
        }

        /* 6. 业务应用场景演示 */
        #scenarios {
            background-color: var(--bg-light);
        }
        .scenario-tabs-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .scenario-box {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid var(--border-color);
            display: flex;
            gap: 24px;
            align-items: flex-start;
            box-shadow: var(--shadow-sm);
        }
        .scenario-box-icon {
            font-size: 32px;
            line-height: 1;
        }
        .scenario-box-info h3 {
            font-size: 19px;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .scenario-box-info p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 7. 关键数据指标统计条 */
        #stats {
            background: linear-gradient(90deg, #0284C7, #0D9488);
            color: #FFFFFF;
            padding: 56px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-number {
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
        }

        /* 8. 典型用户故事对比 */
        #stories {
            background-color: #FFFFFF;
        }
        .stories-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
        }
        .story-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px;
        }
        .story-tag {
            display: inline-block;
            background: #E0F2FE;
            color: #0369A1;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .story-card h3 {
            font-size: 20px;
            margin-bottom: 14px;
            color: var(--primary);
        }
        .story-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .story-contrast {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            border-top: 1px solid var(--border-color);
            padding-top: 18px;
        }
        .contrast-item span {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .contrast-item strong {
            font-size: 15px;
            color: var(--primary);
        }

        /* 9. 口碑与评价墙 */
        #testimonials {
            background-color: var(--bg-light);
        }
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .testimonial-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .testimonial-quote {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 20px;
            position: relative;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .user-avatar {
            width: 44px;
            height: 44px;
            background: #E2E8F0;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--primary);
        }
        .user-info h4 {
            font-size: 14px;
            color: var(--primary);
        }
        .user-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 10. 资讯与技术动态 */
        #news {
            background-color: #FFFFFF;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }
        .news-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--brand-cyan);
        }
        .news-img-wrap {
            height: 180px;
            overflow: hidden;
        }
        .news-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .news-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 11. FAQ 手风琴 */
        #faq {
            background-color: var(--bg-light);
        }
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "+";
            font-size: 20px;
            color: var(--brand-cyan);
            font-weight: bold;
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-content {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 12. 底部转化收口 */
        #cta {
            background: linear-gradient(135deg, #0F172A 0%, #070B14 100%);
            color: #FFFFFF;
            text-align: center;
        }
        .cta-box {
            max-width: 720px;
            margin: 0 auto;
            background: rgba(30, 41, 59, 0.4);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 48px;
        }
        .cta-box h2 {
            font-size: 30px;
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 15px;
            color: #94A3B8;
            margin-bottom: 32px;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .btn-cta-primary {
            background: linear-gradient(135deg, var(--brand-cyan), var(--brand-teal));
            color: #FFF;
            padding: 14px 36px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 15px;
        }
        .btn-cta-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: #FFF;
            padding: 14px 36px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 15px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        /* 页脚 */
        .site-footer {
            background-color: #05080F;
            color: #94A3B8;
            padding: 70px 0 30px;
            font-size: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 50px;
        }
        .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-desc {
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .footer-heading {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-links a:hover {
            color: var(--brand-teal);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 30px;
            text-align: center;
            font-size: 13px;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; }
            .features-grid, .products-grid, .testimonials-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
            .solution-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-menu { display: none; }
            .intro-grid, .stories-grid, .scenario-tabs-grid { grid-template-columns: 1fr; }
            .features-grid, .products-grid, .testimonials-grid, .news-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .solution-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 26px; }
            .hero-content h1 { font-size: 30px; }
        }