/* roulang page: index */
:root {
            --primary: #005A5B;
            --primary-light: #008B8B;
            --accent: #00F0A8;
            --accent-glow: rgba(0, 240, 168, 0.25);
            --bg-light: #F6F8FA;
            --bg-dark: #0A151D;
            --bg-card: #FFFFFF;
            --text-main: #0E1E28;
            --text-muted: #3C4D58;
            --text-sub: #788A96;
            --border-color: #E2E8F0;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(10, 21, 29, 0.04);
            --shadow-md: 0 4px 20px -2px rgba(10, 21, 29, 0.06);
            --shadow-lg: 0 12px 30px -4px rgba(10, 21, 29, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部微型工具栏 */
        .top-bar {
            background-color: #071017;
            color: #94A3B8;
            font-size: 0.8125rem;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .top-bar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            background-color: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--accent);
        }

        /* 主导航 */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .logo span {
            color: var(--primary-light);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 6px 0;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }

        /* 按钮系统 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            text-align: center;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-light);
            box-shadow: 0 4px 14px rgba(0, 90, 91, 0.3);
            transform: translateY(-2px);
        }
        .btn-accent {
            background-color: var(--accent);
            color: #071017;
            font-weight: 700;
        }
        .btn-accent:hover {
            background-color: #1affb5;
            box-shadow: 0 4px 16px var(--accent-glow);
            transform: translateY(-2px);
        }
        .btn-outline {
            border-color: var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background-color: rgba(0, 90, 91, 0.05);
            transform: translateY(-2px);
        }

        /* 板块公用 */
        section {
            padding: 80px 0;
            position: relative;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-header.center {
            text-align: center;
            max-width: 760px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            padding: 4px 10px;
            background: rgba(0, 90, 91, 0.08);
            border-radius: var(--radius-sm);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* 1. Hero 区域 (5:7 错位栅格) */
        .hero-section {
            padding: 70px 0 90px;
            background: linear-gradient(135deg, #FFFFFF 0%, #EDF2F7 100%);
            overflow: hidden;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 5fr 7fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: 2.75rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-content h1 span {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .hero-kpis {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .kpi-item h4 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .kpi-item p {
            font-size: 0.8125rem;
            color: var(--text-sub);
        }
        .hero-visual {
            position: relative;
        }
        .hero-img-box {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255, 255, 255, 0.8);
        }
        .hero-img-box img {
            width: 100%;
            height: 440px;
            object-fit: cover;
        }
        .hero-float-card {
            position: absolute;
            bottom: -20px;
            left: -20px;
            background: #FFFFFF;
            padding: 18px 22px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .float-card-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 10px var(--accent);
        }

        /* 2. 技术品牌与全景介绍 (#intro) */
        .intro-section {
            background-color: #FFFFFF;
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .intro-specs {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
            margin-top: 28px;
        }
        .spec-box {
            padding: 16px;
            background: var(--bg-light);
            border-radius: var(--radius-md);
            border-left: 3px solid var(--primary);
        }
        .spec-box h5 {
            font-size: 0.9375rem;
            color: var(--text-main);
            margin-bottom: 4px;
        }
        .spec-box p {
            font-size: 0.8125rem;
            color: var(--text-sub);
            line-height: 1.5;
        }
        .intro-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .intro-img img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        /* 3. 核心优势矩阵 (#advantages) */
        .advantages-section {
            background-color: var(--bg-light);
        }
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .matrix-card {
            background: #FFFFFF;
            padding: 32px 24px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .matrix-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .matrix-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 90, 91, 0.08);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--primary);
            margin-bottom: 20px;
            font-weight: 800;
        }
        .matrix-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .matrix-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* 4. 核心系统套件区 (#products) */
        .products-section {
            background-color: #FFFFFF;
        }
        .products-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 26px;
            background: #FFFFFF;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            position: relative;
            transition: var(--transition);
        }
        .product-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .product-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(0, 240, 168, 0.15);
            color: #008B8B;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .product-title {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .product-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .feature-list {
            list-style: none;
            margin-bottom: 28px;
        }
        .feature-list li {
            font-size: 0.875rem;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .feature-list li::before {
            content: '✓';
            color: var(--primary);
            font-weight: 800;
        }

        /* 5. 深色高对比度架构理念 (#architecture) */
        .arch-section {
            background-color: var(--bg-dark);
            color: #FFFFFF;
        }
        .arch-section .section-title {
            color: #FFFFFF;
        }
        .arch-section .section-desc {
            color: #94A3B8;
        }
        .arch-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .arch-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .arch-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 22px;
            border-radius: var(--radius-md);
        }
        .arch-card h4 {
            color: var(--accent);
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .arch-card p {
            font-size: 0.85rem;
            color: #CBD5E1;
            line-height: 1.6;
        }
        .arch-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .arch-image-wrap img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        /* 6. 多端应用场景 (#scenarios) */
        .scenarios-section {
            background-color: var(--bg-light);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-color);
        }
        .scenario-img {
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .scenario-img img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }
        .scenario-info h3 {
            font-size: 1.4rem;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .scenario-item {
            margin-bottom: 16px;
        }
        .scenario-item h5 {
            font-size: 0.95rem;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .scenario-item p {
            font-size: 0.875rem;
            color: var(--text-muted);
        }

        /* 7. 落地示范故事 (#stories) */
        .story-section {
            background-color: #FFFFFF;
        }
        .story-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-light);
            border-radius: var(--radius-lg);
            padding: 36px;
            border: 1px solid var(--border-color);
        }
        .story-content h3 {
            font-size: 1.35rem;
            margin-bottom: 14px;
        }
        .story-meta {
            font-size: 0.875rem;
            color: var(--text-sub);
            margin-bottom: 16px;
        }
        .story-progress {
            margin-top: 20px;
        }
        .progress-label {
            display: flex;
            justify-content: space-between;
            font-size: 0.8125rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .progress-bar-bg {
            height: 8px;
            background: #E2E8F0;
            border-radius: 4px;
            overflow: hidden;
        }
        .progress-bar-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 4px;
        }

        /* 8. 核心性能数据指标条 (#stats) */
        .stats-section {
            background: linear-gradient(90deg, #005A5B 0%, #003637 100%);
            color: #FFFFFF;
            padding: 56px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item h3 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-item p {
            font-size: 0.9375rem;
            color: #E2E8F0;
        }

        /* 9. 客户评价墙 (#testimonials) */
        .testimonials-section {
            background-color: var(--bg-light);
        }
        .testi-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testi-card {
            background: #FFFFFF;
            padding: 28px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .testi-stars {
            color: #FFB800;
            font-size: 1rem;
            margin-bottom: 12px;
        }
        .testi-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.65;
        }
        .testi-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #005A5B;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        .author-info h5 {
            font-size: 0.9rem;
            color: var(--text-main);
        }
        .author-info p {
            font-size: 0.75rem;
            color: var(--text-sub);
        }

        /* 10. 资讯前沿摘要 (#news) */
        .news-section {
            background-color: #FFFFFF;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #FFFFFF;
            transition: var(--transition);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .news-img {
            height: 180px;
            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: 22px;
        }
        .news-meta {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .news-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.6;
        }

        /* 11. FAQ 手风琴 (#faq) */
        .faq-section {
            background-color: var(--bg-light);
        }
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }
        .faq-icon {
            font-size: 1.2rem;
            transition: var(--transition);
            color: var(--primary);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            padding-bottom: 18px;
        }

        /* 12. 底部转化表单 (#contact) */
        .contact-section {
            background-color: #071017;
            color: #FFFFFF;
            padding: 70px 0;
        }
        .contact-box {
            background: #0A151D;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 48px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .contact-text h2 {
            font-size: 2rem;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .contact-text p {
            color: #94A3B8;
            font-size: 0.95rem;
            line-height: 1.65;
            margin-bottom: 24px;
        }
        .contact-direct {
            font-size: 0.9rem;
            color: var(--accent);
            line-height: 1.8;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            background: #13222E;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            color: #FFFFFF;
            font-size: 0.9rem;
            outline: none;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--accent);
            background: #182C3C;
        }

        /* 页脚 (Footer) */
        .main-footer {
            background-color: #04090D;
            color: #94A3B8;
            padding: 60px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.875rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand h4 {
            font-size: 1.1rem;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.8125rem;
            line-height: 1.7;
            color: #64748B;
        }
        .footer-col h5 {
            font-size: 0.9375rem;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.75rem;
            color: #64748B;
        }

        /* 移动端汉堡按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-main);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
            }
            .hero-img-box img {
                height: 360px;
            }
            .matrix-grid, .products-grid, .news-grid, .testi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .nav-menu {
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 24px;
                gap: 16px;
                box-shadow: var(--shadow-md);
                display: none;
            }
            .nav-menu.open {
                display: flex;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .intro-grid, .arch-grid, .scenario-grid, .story-card, .contact-box {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .matrix-grid, .products-grid, .news-grid, .testi-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }