/* roulang page: index */
:root {
            --primary-dark: #0B0F17;
            --primary-surface: #111827;
            --primary-green: #10B981;
            --primary-green-dark: #059669;
            --accent-orange: #F97316;
            --text-main: #0F172A;
            --text-muted: #475569;
            --text-light: #94A3B8;
            --text-white: #F8FAFC;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --border-light: rgba(15, 23, 42, 0.08);
            --border-dark: rgba(255, 255, 255, 0.1);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --shadow-subtle: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            --shadow-hover: 0 12px 32px -4px rgba(15, 23, 42, 0.1);
            --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 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", "Noto Sans SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部双行导航 */
        .top-bar {
            background-color: var(--primary-dark);
            color: var(--text-light);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
            border-bottom: 1px solid var(--border-dark);
        }

        .top-bar-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #E2E8F0;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--primary-green);
            box-shadow: 0 0 8px var(--primary-green);
        }

        .top-contact-info {
            display: flex;
            gap: 20px;
        }

        .main-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: 72px;
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--primary-dark);
        }

        .brand-logo-mark {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary-dark), #1E293B);
            border: 2px solid var(--primary-green);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-green);
            font-weight: 900;
            font-size: 18px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            padding: 8px 0;
            position: relative;
        }

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition-smooth);
        }

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

        .btn-primary:hover {
            background-color: var(--primary-green-dark);
            transform: translateY(-1px);
        }

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

        .btn-dark:hover {
            background-color: #1E293B;
            transform: translateY(-1px);
        }

        .btn-outline {
            border-color: rgba(255, 255, 255, 0.25);
            color: #FFFFFF;
            background: transparent;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Hero 裂变首屏与进度机制 */
        .hero-banner {
            position: relative;
            background-color: var(--primary-dark);
            color: var(--text-white);
            padding: 88px 0 80px;
            background-image: linear-gradient(to bottom, rgba(11, 15, 23, 0.88), rgba(11, 15, 23, 0.96)), url('/assets/images/f7a66471cd605698.webp');
            background-size: cover;
            background-position: center;
        }

        .hero-layout {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 48px;
            align-items: center;
        }

        .hero-badge-tag {
            display: inline-flex;
            align-items: center;
            background: rgba(16, 185, 129, 0.15);
            border: 1px solid rgba(16, 185, 129, 0.35);
            color: var(--primary-green);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 20px;
        }

        .hero-title {
            font-size: 40px;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            font-weight: 800;
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.7;
            color: #CBD5E1;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 36px;
        }

        /* 裂变邀请进展小部件 */
        .invite-tier-widget {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-md);
            padding: 24px;
            backdrop-filter: blur(10px);
        }

        .tier-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 14px;
        }

        .tier-title {
            font-size: 14px;
            font-weight: 600;
            color: #F8FAFC;
        }

        .tier-reward-tag {
            font-size: 12px;
            color: var(--accent-orange);
            font-weight: 700;
        }

        .progress-bar-container {
            width: 100%;
            height: 10px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 5px;
            overflow: hidden;
            margin-bottom: 12px;
            position: relative;
        }

        .progress-bar-fill {
            height: 100%;
            width: 72%;
            background: linear-gradient(90deg, var(--primary-green), #34D399);
            border-radius: 5px;
        }

        .progress-meta {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
        }

        .progress-meta strong {
            color: #FFFFFF;
        }

        /* 首屏右侧沉浸卡片 */
        .hero-card-preview {
            background: rgba(17, 24, 39, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
        }

        .preview-header {
            border-bottom: 1px solid var(--border-dark);
            padding-bottom: 16px;
            margin-bottom: 20px;
        }

        .preview-header h3 {
            font-size: 18px;
            color: #F8FAFC;
            margin-bottom: 4px;
        }

        .preview-header p {
            font-size: 13px;
            color: var(--text-light);
        }

        .kpi-mini-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-bottom: 24px;
        }

        .kpi-mini-box {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-sm);
            padding: 16px;
        }

        .kpi-mini-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary-green);
            font-family: "DIN Alternate", "Inter", sans-serif;
        }

        .kpi-mini-label {
            font-size: 13px;
            color: var(--text-light);
            margin-top: 4px;
        }

        .hero-status-strip {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: #CBD5E1;
            padding-top: 16px;
            border-top: 1px solid var(--border-dark);
        }

        /* Section 通用规范 */
        .section-block {
            padding: 96px 0;
            position: relative;
        }

        .section-bg-light {
            background-color: var(--bg-page);
        }

        .section-bg-white {
            background-color: #FFFFFF;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-bg-dark {
            background-color: var(--primary-dark);
            color: var(--text-white);
        }

        .section-header {
            margin-bottom: 56px;
        }

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

        .section-subhead {
            font-size: 13px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary-green);
            margin-bottom: 8px;
            display: block;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            color: inherit;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .section-bg-dark .section-desc {
            color: var(--text-light);
        }

        /* 1. 入口矩阵区 */
        .portal-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .portal-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: var(--transition-smooth);
            position: relative;
        }

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

        .portal-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: #ECFDF5;
            color: var(--primary-green);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .portal-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .portal-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 2. 运营实时数据看板 */
        .metric-dashboard-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-card {
            background: #111827;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            position: relative;
        }

        .metric-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20%;
            right: 20%;
            height: 2px;
            background: var(--primary-green);
        }

        .metric-num {
            font-size: 44px;
            font-weight: 800;
            font-family: "DIN Alternate", "Inter", sans-serif;
            color: #F8FAFC;
            margin-bottom: 8px;
        }

        .metric-unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-green);
            margin-left: 2px;
        }

        .metric-title {
            font-size: 15px;
            font-weight: 600;
            color: #CBD5E1;
            margin-bottom: 8px;
        }

        .metric-footnote {
            font-size: 13px;
            color: var(--text-light);
        }

        /* 3. 架构与标准区 */
        .arch-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .arch-content p {
            margin-bottom: 20px;
            font-size: 15px;
            color: var(--text-muted);
        }

        .compliance-box {
            background: #ECFDF5;
            border-left: 4px solid var(--primary-green);
            padding: 18px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin-top: 24px;
        }

        .compliance-box h4 {
            font-size: 14px;
            font-weight: 700;
            color: #065F46;
            margin-bottom: 6px;
        }

        .compliance-box p {
            font-size: 13px;
            color: #047857;
            margin-bottom: 0;
        }

        .arch-visual {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-subtle);
        }

        .arch-layer {
            background: #F8FAFC;
            border: 1px dashed rgba(15, 23, 42, 0.15);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            margin-bottom: 12px;
        }

        .arch-layer:last-child {
            margin-bottom: 0;
        }

        .layer-name {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }

        .layer-desc {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 4. 核心能力与服务矩阵 (6卡片) */
        .core-matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .matrix-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px;
            transition: var(--transition-smooth);
        }

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

        .matrix-icon-badge {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background: #F1F5F9;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .matrix-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .matrix-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 5. 热门服务方案与套件 (3卡片) */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .solution-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
        }

        .solution-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .solution-thumb-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .solution-thumb-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .solution-card:hover .solution-thumb-wrap img {
            transform: scale(1.04);
        }

        .solution-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 23, 42, 0.85);
            color: #FFFFFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            backdrop-filter: blur(4px);
        }

        .solution-body {
            padding: 28px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .solution-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .solution-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .feature-bullets {
            list-style: none;
            margin-bottom: 24px;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }

        .feature-bullets li {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .feature-bullets li::before {
            content: '✓';
            color: var(--primary-green);
            font-weight: 700;
        }

        /* 6. 对比选型表 */
        .comparison-table-wrapper {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow-x: auto;
            box-shadow: var(--shadow-subtle);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 680px;
        }

        .comparison-table th, .comparison-table td {
            padding: 18px 24px;
            font-size: 14px;
            border-bottom: 1px solid var(--border-light);
        }

        .comparison-table th {
            background: #F8FAFC;
            font-weight: 700;
            color: var(--text-main);
        }

        .comparison-table th.highlight-col, .comparison-table td.highlight-col {
            background: #F0FDF4;
            color: #166534;
            font-weight: 600;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        /* 7. 里程碑发展历程 */
        .timeline-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .timeline-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
        }

        .timeline-year {
            display: inline-block;
            font-size: 13px;
            font-weight: 800;
            color: var(--primary-green);
            background: #ECFDF5;
            padding: 2px 10px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .timeline-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .timeline-text {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 8. 实战案例沉浸区 (Dark) */
        .case-showcase-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
        }

        .case-dark-card {
            background: #111827;
            border: 1px solid var(--border-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .case-thumb {
            height: 220px;
            position: relative;
        }

        .case-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-body {
            padding: 32px;
            flex-grow: 1;
        }

        .case-kpi-badge {
            display: inline-block;
            background: rgba(249, 115, 22, 0.15);
            border: 1px solid rgba(249, 115, 22, 0.4);
            color: var(--accent-orange);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .case-title {
            font-size: 20px;
            color: #FFFFFF;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .case-desc {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .case-metrics-bar {
            display: flex;
            gap: 20px;
            border-top: 1px solid var(--border-dark);
            padding-top: 16px;
        }

        .case-metric-item strong {
            display: block;
            font-size: 18px;
            color: var(--primary-green);
            font-family: "DIN Alternate", "Inter", sans-serif;
        }

        .case-metric-item span {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 9. 用户运营心声 */
        .story-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .story-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px;
            position: relative;
            box-shadow: var(--shadow-subtle);
        }

        .quote-icon {
            font-size: 40px;
            line-height: 1;
            color: #CBD5E1;
            margin-bottom: 12px;
            font-family: Georgia, serif;
        }

        .story-quote {
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .story-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
        }

        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: #E2E8F0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--text-muted);
            font-size: 14px;
        }

        .author-info h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-main);
        }

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

        /* 10. 用户评价墙 */
        .feedback-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feedback-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-subtle);
        }

        .rating-stars {
            color: #F59E0B;
            font-size: 14px;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }

        .feedback-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 18px;
        }

        .feedback-source {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .verify-tag {
            color: var(--primary-green-dark);
            background: #ECFDF5;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 11px;
        }

        /* 11. 行业动态与资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
        }

        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }

        .news-thumb {
            height: 180px;
            overflow: hidden;
        }

        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

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

        .news-date {
            font-size: 12px;
            color: var(--text-light);
            margin-bottom: 8px;
            font-weight: 500;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
            line-height: 1.45;
        }

        .news-excerpt {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .news-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-green-dark);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 12. 平台保障与合规 */
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .assurance-card {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
        }

        .assurance-icon {
            font-size: 26px;
            margin-bottom: 14px;
            display: inline-block;
        }

        .assurance-card h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .assurance-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.55;
        }

        /* 13. FAQ 手风琴 */
        .faq-accordion-container {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-header {
            padding: 20px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-question {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
        }

        .faq-toggle-icon {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-light);
            transition: transform 0.25s ease;
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            background: #F8FAFC;
        }

        .faq-body-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .faq-item.active {
            border-color: var(--primary-green);
        }

        .faq-item.active .faq-toggle-icon {
            transform: rotate(45deg);
            color: var(--primary-green);
        }

        .faq-item.active .faq-body {
            max-height: 300px;
        }

        /* 转化表单与收口行动区 */
        .conversion-section {
            background: linear-gradient(135deg, #0B0F17 0%, #111827 100%);
            color: #FFFFFF;
            padding: 88px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .cta-box {
            max-width: 780px;
            margin: 0 auto;
            text-align: center;
        }

        .cta-box h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }

        .cta-box p {
            font-size: 15px;
            color: #94A3B8;
            margin-bottom: 36px;
        }

        .booking-form {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 32px;
            border-radius: var(--radius-lg);
            text-align: left;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

        .form-label {
            font-size: 13px;
            font-weight: 600;
            color: #E2E8F0;
        }

        .form-input, .form-select {
            height: 44px;
            padding: 0 14px;
            background: rgba(15, 23, 42, 0.6);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            color: #FFFFFF;
            font-size: 14px;
            outline: none;
            transition: var(--transition-smooth);
        }

        .form-input:focus, .form-select:focus {
            border-color: var(--primary-green);
            box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
        }

        .form-btn {
            height: 48px;
            background: var(--primary-green);
            color: #FFFFFF;
            font-size: 15px;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition-smooth);
            margin-top: 8px;
        }

        .form-btn:hover {
            background: var(--primary-green-dark);
            transform: translateY(-1px);
        }

        .privacy-hint {
            font-size: 12px;
            color: #64748B;
            text-align: center;
            margin-top: 14px;
        }

        /* 统一页脚 */
        .site-footer {
            background: #070A0F;
            color: #94A3B8;
            padding: 72px 0 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 56px;
        }

        .footer-brand h3 {
            font-size: 20px;
            color: #FFFFFF;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .footer-brand p {
            line-height: 1.65;
            margin-bottom: 20px;
            font-size: 13px;
        }

        .footer-col h4 {
            font-size: 15px;
            color: #FFFFFF;
            font-weight: 700;
            margin-bottom: 18px;
        }

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

        .footer-links a {
            color: #94A3B8;
            font-size: 13px;
        }

        .footer-links a:hover {
            color: #FFFFFF;
            padding-left: 2px;
        }

        .footer-contact-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 13px;
        }

        .footer-contact-list strong {
            color: #E2E8F0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #64748B;
        }

        .footer-bottom a:hover {
            color: #94A3B8;
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--primary-dark);
        }

        /* 响应式断点 */
        @media (max-width: 1024px) {
            .portal-grid, .assurance-grid, .metric-dashboard-grid, .timeline-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .core-matrix-grid, .solutions-grid, .feedback-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-layout, .arch-layout, .case-showcase-grid, .story-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .top-bar {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                padding: 20px 24px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.08);
                border-bottom: 1px solid var(--border-light);
            }
            .nav-menu.show {
                display: flex;
            }
            .hero-title {
                font-size: 28px;
            }
            .section-block {
                padding: 60px 0;
            }
            .core-matrix-grid, .solutions-grid, .feedback-grid, .news-grid,
            .portal-grid, .assurance-grid, .metric-dashboard-grid, .timeline-grid {
                grid-template-columns: 1fr;
            }
            .booking-form {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
        }