/* roulang page: index */
:root {
            --primary: #1d4ed8;
            --primary-hover: #1e40af;
            --primary-light: #eff6ff;
            --secondary: #0284c7;
            --accent: #f97316;
            --success: #10b981;
            --bg-light: #f5f8fc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-surface: #1e293b;
            --text-heading: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --card-radius: 14px;
            --btn-radius: 8px;
            --shadow-sm: 0 2px 6px -1px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.02);
            --shadow-lg: 0 20px 25px -5px rgba(29, 78, 216, 0.08), 0 8px 10px -6px rgba(29, 78, 216, 0.04);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* 基础重置与排版规范 */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

        /* 标题层级 */
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 700;
            line-height: 1.35;
        }

        .section-header {
            margin-bottom: 3.5rem;
        }

        .section-header h2 {
            font-size: 2.15rem;
            position: relative;
            display: inline-block;
            margin-bottom: 0.85rem;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 780px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 9999px;
            margin-bottom: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        /* 板块留白与结构 */
        section {
            padding-top: 5.5rem;
            padding-bottom: 5.5rem;
            position: relative;
        }

        .bg-surface {
            background-color: #ffffff;
        }

        .bg-soft {
            background-color: #f5f8fc;
        }

        .bg-navy {
            background-color: var(--bg-dark);
            color: #f8fafc;
        }

        /* 卡片基础系统 */
        .card-custom {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            overflow: hidden;
            height: 100%;
        }

        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(29, 78, 216, 0.25);
        }

        /* 按钮与交互控件 */
        .btn-custom-primary {
            background-color: var(--primary);
            color: #ffffff;
            border-radius: var(--btn-radius);
            padding: 12px 28px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1px solid var(--primary);
            transition: var(--transition);
            min-height: 44px;
        }

        .btn-custom-primary:hover {
            background-color: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(29, 78, 216, 0.3);
        }

        .btn-custom-secondary {
            background-color: #ffffff;
            color: var(--primary);
            border-radius: var(--btn-radius);
            padding: 12px 28px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            min-height: 44px;
        }

        .btn-custom-secondary:hover {
            background-color: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* 顶部双行导航系统 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background-color: #ffffff;
            box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
        }

        .header-top-row {
            border-bottom: 1px solid #f1f5f9;
            padding: 10px 0;
            font-size: 0.9rem;
        }

        .brand-logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-logo-text .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 1.15rem;
        }

        .nav-grid-strip {
            padding: 6px 0;
            background-color: #ffffff;
        }

        .nav-grid-items {
            display: flex;
            align-items: center;
            justify-content: space-between;
            overflow-x: auto;
            white-space: nowrap;
            gap: 10px;
            scrollbar-width: none;
        }

        .nav-grid-items::-webkit-scrollbar {
            display: none;
        }

        .nav-grid-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 6px;
            color: var(--text-body);
            font-size: 0.92rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-grid-link i {
            color: var(--primary);
            font-size: 0.95rem;
        }

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

        /* 首屏看板复合区 */
        .hero-section {
            padding-top: 4.5rem;
            padding-bottom: 5.5rem;
            background: radial-gradient(circle at 10% 20%, rgba(239, 246, 255, 0.8) 0%, rgba(245, 248, 252, 1) 90%);
        }

        .hero-tag {
            background-color: #fee2e2;
            color: #dc2626;
            font-size: 0.82rem;
            padding: 4px 10px;
            border-radius: 6px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            margin-bottom: 1.25rem;
        }

        .hero-group-notice {
            background: #ffffff;
            border-left: 4px solid var(--accent);
            padding: 12px 18px;
            border-radius: 6px;
            box-shadow: var(--shadow-sm);
            margin: 1.75rem 0;
            font-size: 0.95rem;
        }

        .dashboard-mockup {
            background: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: 0 15px 35px -5px rgba(15, 23, 42, 0.1), 0 5px 15px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(226, 232, 240, 0.8);
            overflow: hidden;
        }

        .dashboard-header {
            background: #0f172a;
            color: #ffffff;
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.88rem;
        }

        .dashboard-latency-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(16, 185, 129, 0.2);
            color: #34d399;
            padding: 3px 9px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-family: monospace;
        }

        .dashboard-body {
            padding: 20px;
        }

        .match-score-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: #f8fafc;
            border: 1px solid #e2e8f0;
            border-radius: 10px;
            padding: 14px 18px;
            margin-bottom: 15px;
        }

        .tactical-heatmap-mock {
            height: 180px;
            background: linear-gradient(135deg, rgba(29, 78, 216, 0.05) 0%, rgba(2, 132, 199, 0.1) 100%);
            border-radius: 8px;
            border: 1px dashed #cbd5e1;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .pitch-lines {
            position: absolute;
            inset: 10px;
            border: 1px solid rgba(203, 213, 225, 0.8);
            border-radius: 4px;
        }
        .pitch-center-circle {
            position: absolute;
            width: 50px;
            height: 50px;
            border: 1px solid rgba(203, 213, 225, 0.8);
            border-radius: 50%;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
        }

        /* 优势网格 */
        .advantage-card-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1rem;
        }

        .advantage-icon-box {
            width: 48px;
            height: 48px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
        }

        /* 方案卡片与价格/规格 */
        .product-card {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            border-top: 4px solid transparent;
        }

        .product-card.featured {
            border-top-color: var(--primary);
            box-shadow: var(--shadow-lg);
        }

        .product-feature-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0;
        }

        .product-feature-list li {
            padding: 8px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            border-bottom: 1px dashed #f1f5f9;
        }

        /* 对比参数表 */
        .comparison-table-wrapper {
            background: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .comparison-table th {
            background: #f8fafc;
            color: var(--text-heading);
            padding: 16px 20px;
            font-weight: 700;
            border-bottom: 2px solid var(--border-color);
        }

        .comparison-table td {
            padding: 16px 20px;
            vertical-align: middle;
            border-bottom: 1px solid #f1f5f9;
            font-size: 0.95rem;
        }

        /* 深度案例板块 (Navy 深色) */
        .navy-tactics-board {
            background: #1e293b;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            padding: 24px;
        }

        /* 时间线 */
        .timeline-container {
            position: relative;
            padding-left: 20px;
        }

        .timeline-container::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            bottom: 10px;
            width: 3px;
            background: #cbd5e1;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 2.25rem;
            padding-left: 25px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #ffffff;
            border: 3px solid var(--primary);
        }

        /* 关键指标横条 */
        .metric-stat-box {
            text-align: center;
            padding: 20px 10px;
        }

        .metric-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            font-family: "SF Pro Display", -apple-system, monospace;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        /* FAQ 手风琴重置 */
        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background-color: var(--primary-light);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(29, 78, 216, 0.25);
        }

        .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: 10px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        /* 表单转化区 */
        .lead-form-box {
            background: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            padding: 2.5rem;
        }

        .form-control, .form-select {
            border-radius: var(--btn-radius);
            padding: 12px 16px;
            border: 1px solid #cbd5e1;
            font-size: 0.95rem;
        }

        .form-control:focus, .form-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
        }

        /* 页脚规范 */
        .site-footer {
            background-color: #0b1120;
            color: #94a3b8;
            padding-top: 5rem;
            padding-bottom: 2.5rem;
            font-size: 0.92rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-title {
            color: #ffffff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 1.25rem;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a:hover {
            color: #ffffff;
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 4rem;
            padding-top: 1.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
        }

        /* 移动端适配响应 */
        @media (max-width: 991.98px) {
            .section-header h2 {
                font-size: 1.75rem;
            }
            .hero-section {
                padding-top: 3rem;
                padding-bottom: 3.5rem;
            }
            .dashboard-mockup {
                margin-top: 2.5rem;
            }
        }