/* roulang page: index */
:root {
            --bg-body: #F8FAFC;
            --bg-surface: #FFFFFF;
            --bg-midnight: #0F172A;
            --primary-blue: #1D4ED8;
            --primary-hover: #2563EB;
            --accent-cyan: #0EA5E9;
            --accent-amber: #F59E0B;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --card-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 12px -2px rgba(15, 23, 42, 0.03);
            --card-shadow-hover: 0 20px 40px -10px rgba(29, 78, 216, 0.12);
            --radius-default: 16px;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-body);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
            padding-bottom: 70px;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .font-num {
            font-variant-numeric: tabular-nums;
        }

        /* 顶部两行导航 */
        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1040;
        }
        .header-top {
            padding: 14px 0;
            border-bottom: 1px solid #F1F5F9;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary-blue);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .brand-logo:hover {
            color: var(--primary-hover);
        }
        .brand-badge {
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 9999px;
            background: #EFF6FF;
            color: var(--primary-blue);
            font-weight: 600;
        }

        /* 横滑 Chip 导航 */
        .chip-nav-wrapper {
            padding: 10px 0;
            overflow-x: auto;
            white-space: nowrap;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .chip-nav-wrapper::-webkit-scrollbar {
            display: none;
        }
        .chip-list {
            display: flex;
            gap: 8px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .chip-item a {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 9999px;
            font-size: 14px;
            font-weight: 500;
            background: #F1F5F9;
            color: var(--text-body);
            text-decoration: none;
            transition: all 0.25s ease;
            min-height: 36px;
            line-height: 24px;
        }
        .chip-item a:hover, .chip-item a.active {
            background: var(--primary-blue);
            color: #FFFFFF;
            box-shadow: 0 4px 12px rgba(29, 78, 216, 0.25);
        }

        /* Section 通用规范 */
        section {
            padding: 96px 0;
            position: relative;
        }
        @media (max-width: 768px) {
            section {
                padding: 56px 0;
            }
        }
        .section-light {
            background-color: var(--bg-surface);
        }
        .section-alt {
            background-color: var(--bg-body);
        }
        .section-midnight {
            background-color: var(--bg-midnight);
            color: #F8FAFC;
        }
        .section-midnight h2, .section-midnight h3, .section-midnight h4 {
            color: #FFFFFF;
        }
        .section-midnight .text-muted {
            color: #94A3B8 !important;
        }

        .section-header {
            max-width: 800px;
            margin: 0 auto 56px auto;
            text-align: center;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-blue);
            background: #EFF6FF;
            padding: 4px 12px;
            border-radius: 9999px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .section-header h2 {
            font-size: 32px;
            margin-bottom: 16px;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 16px;
            margin: 0;
        }

        /* 自定义卡片与微交互 */
        .platform-card {
            background: var(--bg-surface);
            border-radius: var(--radius-default);
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            height: 100%;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .platform-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-shadow-hover);
            border-color: rgba(37, 99, 235, 0.3);
        }

        .btn-custom-primary {
            background-color: var(--primary-blue);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: 9999px;
            padding: 12px 28px;
            border: none;
            transition: all 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 44px;
        }
        .btn-custom-primary:hover {
            background-color: var(--primary-hover);
            color: #FFFFFF;
            box-shadow: 0 8px 20px rgba(29, 78, 216, 0.3);
        }

        .btn-custom-outline {
            background: transparent;
            color: var(--primary-blue);
            border: 1.5px solid var(--primary-blue);
            font-weight: 600;
            border-radius: 9999px;
            padding: 12px 28px;
            transition: all 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            min-height: 44px;
        }
        .btn-custom-outline:hover {
            background: #EFF6FF;
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }

        /* 轮播大图区 */
        .hero-banner {
            position: relative;
            background: #0F172A;
            overflow: hidden;
            padding: 72px 0 96px 0;
        }
        .hero-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/d0fd07a132cad88f.webp') center/cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: luminosity;
        }
        .hero-content-box {
            position: relative;
            z-index: 2;
            background: rgba(255, 255, 255, 0.96);
            border-radius: 20px;
            padding: 48px;
            box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25);
            border: 1px solid rgba(255, 255, 255, 0.8);
        }
        @media (max-width: 768px) {
            .hero-content-box {
                padding: 24px;
            }
        }

        /* 搜索快捷入口 */
        .hero-search-box {
            max-width: 640px;
            margin: 28px 0 20px 0;
            position: relative;
        }
        .hero-search-box input {
            height: 52px;
            padding-left: 48px;
            border-radius: 9999px;
            border: 1.5px solid var(--border-light);
            font-size: 15px;
            width: 100%;
        }
        .hero-search-box input:focus {
            outline: none;
            border-color: var(--primary-blue);
            box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.15);
        }
        .hero-search-box i {
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 18px;
        }

        /* 卖点三连浮动卡 */
        .prop-card {
            border-radius: var(--radius-default);
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            padding: 32px 28px;
            box-shadow: var(--card-shadow);
            height: 100%;
        }
        .prop-icon {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 20px;
        }

        /* 架构与技术介绍 */
        .tech-badge-list {
            list-style: none;
            padding: 0;
            margin: 24px 0 0 0;
        }
        .tech-badge-list li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 15px;
        }

        /* 场景演示 Nav-Pills */
        .nav-scene .nav-link {
            border-radius: 9999px;
            padding: 10px 24px;
            color: var(--text-body);
            background: #F1F5F9;
            font-weight: 600;
            border: none;
            margin: 0 6px;
            transition: all 0.25s ease;
        }
        .nav-scene .nav-link.active {
            background-color: var(--primary-blue);
            color: #FFFFFF;
        }
        .mockup-window {
            background: #FFFFFF;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            margin-top: 32px;
        }
        .mockup-header {
            background: #F8FAFC;
            padding: 12px 20px;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mockup-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            display: inline-block;
        }

        /* 对比表格重塑 */
        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: var(--radius-default);
            overflow: hidden;
            background: #FFFFFF;
            border: 1px solid var(--border-light);
        }
        .compare-table th, .compare-table td {
            padding: 20px;
            text-align: center;
            border-bottom: 1px solid var(--border-light);
        }
        .compare-table th:first-child, .compare-table td:first-child {
            text-align: left;
            font-weight: 600;
            width: 34%;
        }
        .compare-highlight {
            background: #F0F7FF;
            color: var(--primary-blue);
            font-weight: 700;
            border-left: 2px solid var(--primary-blue);
            border-right: 2px solid var(--primary-blue);
        }

        /* 数据指标通栏 */
        .stats-grid {
            background: linear-gradient(135deg, #1E40AF 0%, #1D4ED8 100%);
            border-radius: 20px;
            padding: 48px 32px;
            color: #FFFFFF;
        }
        .stat-item {
            border-right: 1px solid rgba(255, 255, 255, 0.15);
            text-align: center;
            padding: 0 16px;
        }
        @media (max-width: 768px) {
            .stat-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.15);
                padding: 16px 0;
            }
        }
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            color: #FFFFFF;
        }

        /* FAQ 手风琴重塑 */
        .accordion-button:not(.collapsed) {
            background-color: #EFF6FF;
            color: var(--primary-blue);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(29, 78, 216, 0.25);
        }
        .accordion-item {
            border-radius: 12px !important;
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
        }

        /* 页脚规范 */
        footer {
            background-color: #0B1120;
            color: #94A3B8;
            padding: 80px 0 40px 0;
            border-top: 1px solid #1E293B;
            font-size: 14px;
        }
        footer h5 {
            color: #FFFFFF;
            font-size: 16px;
            margin-bottom: 24px;
        }
        footer a {
            color: #94A3B8;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        footer a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            margin-top: 60px;
            padding-top: 24px;
            border-top: 1px solid #1E293B;
            text-align: center;
            font-size: 13px;
        }

        /* 底部固定转化条 */
        .fixed-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1030;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--border-light);
            padding: 12px 0;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
        }