/* roulang page: index */
:root {
            --bg-primary: #0D1117;
            --bg-surface: #161B22;
            --bg-elevated: #21262D;
            --accent-teal: #00E599;
            --accent-teal-hover: #00D2B4;
            --accent-amber: #FF9F1C;
            --text-primary: #F0F6FC;
            --text-secondary: #C9D1D9;
            --text-muted: #8B949E;
            --border-subtle: rgba(240, 246, 252, 0.1);
            --border-hover: rgba(0, 229, 153, 0.5);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --max-width: 1280px;
            --radius-sm: 4px;
            --radius-md: 8px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
            background-color: var(--bg-primary);
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        button, input, textarea, select {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* 顶部微型实用栏 */
        .utility-bar {
            background-color: #070a0e;
            border-bottom: 1px solid var(--border-subtle);
            font-size: 13px;
            color: var(--text-muted);
            padding: 8px 0;
        }

        .utility-flex {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .utility-left span, .utility-right a {
            margin-right: 20px;
        }

        .utility-badge {
            display: inline-flex;
            align-items: center;
            padding: 2px 8px;
            background: rgba(0, 229, 153, 0.1);
            color: var(--accent-teal);
            border-radius: var(--radius-sm);
            font-size: 12px;
            font-weight: 600;
        }

        /* 主导航 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(13, 17, 23, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-subtle);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-teal), #008f5d);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0D1117;
            font-weight: 900;
            font-size: 18px;
            box-shadow: 0 0 12px rgba(0, 229, 153, 0.4);
        }

        .logo-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }

        .logo-subtitle {
            font-size: 11px;
            color: var(--accent-teal);
            letter-spacing: 1px;
            display: block;
            margin-top: -2px;
            font-weight: 600;
        }

        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

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

        .nav-link:hover, .nav-link.active {
            color: var(--accent-teal);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--accent-teal);
            box-shadow: 0 0 8px var(--accent-teal);
        }

        .nav-cta-btn {
            background-color: var(--accent-teal);
            color: #08130f;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            border: 1px solid var(--accent-teal);
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .nav-cta-btn:hover {
            background-color: var(--accent-teal-hover);
            box-shadow: 0 0 16px rgba(0, 229, 153, 0.35);
        }

        .menu-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            width: 100%;
            background: #11161d;
            border-bottom: 1px solid var(--border-subtle);
            padding: 24px;
            box-shadow: 0 16px 30px rgba(0,0,0,0.8);
            z-index: 998;
        }

        .mobile-drawer.active {
            display: block;
        }

        .mobile-nav-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .mobile-nav-list a {
            font-size: 16px;
            color: var(--text-secondary);
            display: block;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }

        /* 通用板块样式 */
        .section-block {
            padding: 96px 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

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

        .section-tag {
            display: inline-block;
            color: var(--accent-teal);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.3;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 820px;
            line-height: 1.8;
        }

        /* 板块 1: Hero 全宽视频质感遮罩首屏 */
        .hero-section {
            position: relative;
            min-height: 720px;
            display: flex;
            align-items: center;
            background: #090c10;
            overflow: hidden;
            border-bottom: 1px solid var(--border-subtle);
        }

        .hero-media-backdrop {
            position: absolute;
            inset: 0;
            z-index: 1;
        }

        .hero-bg-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            filter: brightness(0.28) contrast(1.15);
        }

        .hero-grid-overlay {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(0, 229, 153, 0.03) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(0, 229, 153, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .hero-vignette {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 60% 50%, rgba(13, 17, 23, 0.4) 0%, rgba(13, 17, 23, 0.95) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0;
            max-width: 860px;
        }

        .hero-badge-row {
            display: flex;
            gap: 12px;
            align-items: center;
            margin-bottom: 24px;
        }

        .hero-pill {
            background: rgba(0, 229, 153, 0.12);
            color: var(--accent-teal);
            border: 1px solid rgba(0, 229, 153, 0.3);
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-sm);
        }

        .hero-pill-orange {
            background: rgba(255, 159, 28, 0.12);
            color: var(--accent-amber);
            border: 1px solid rgba(255, 159, 28, 0.3);
        }

        .hero-h1 {
            font-size: 46px;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 24px;
            color: #ffffff;
            letter-spacing: -1px;
        }

        .hero-h1 span {
            color: var(--accent-teal);
        }

        .hero-lead-text {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 40px;
            max-width: 780px;
        }

        .hero-actions-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
        }

        .btn-primary {
            background-color: var(--accent-teal);
            color: #06110d;
            font-weight: 700;
            padding: 14px 30px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            border: 1px solid var(--accent-teal);
            transition: all 0.2s ease;
        }

        .btn-primary:hover {
            background-color: var(--accent-teal-hover);
            box-shadow: 0 0 20px rgba(0, 229, 153, 0.4);
            transform: translateY(-1px);
        }

        .btn-outline {
            background-color: rgba(22, 27, 34, 0.8);
            color: var(--text-primary);
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            border: 1px solid var(--border-subtle);
            backdrop-filter: blur(8px);
            transition: all 0.2s ease;
        }

        .btn-outline:hover {
            border-color: var(--text-primary);
            background-color: var(--bg-elevated);
        }

        .video-indicator {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .pulse-dot {
            width: 8px;
            height: 8px;
            background-color: var(--accent-teal);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--accent-teal);
            animation: pulse-ring 2s infinite;
        }

        @keyframes pulse-ring {
            0% { transform: scale(0.95); opacity: 0.8; }
            50% { transform: scale(1.3); opacity: 1; }
            100% { transform: scale(0.95); opacity: 0.8; }
        }

        /* 板块 2: 产业痛点剖析 */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .pain-card {
            background-color: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 32px;
            position: relative;
            transition: border-color 0.25s, transform 0.25s;
        }

        .pain-card:hover {
            border-color: rgba(255, 159, 28, 0.5);
            transform: translateY(-2px);
        }

        .pain-num {
            font-size: 24px;
            font-weight: 900;
            color: var(--accent-amber);
            margin-bottom: 16px;
            opacity: 0.85;
        }

        .pain-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .pain-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 板块 3: 架构分层图文展示 */
        .arch-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .arch-specs-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-top: 24px;
        }

        .arch-spec-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .arch-icon-tag {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            background: rgba(0, 229, 153, 0.1);
            color: var(--accent-teal);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
        }

        .arch-media-box {
            position: relative;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            background: #11161d;
        }

        .arch-media-box img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.3s ease;
        }

        .arch-media-box:hover img {
            transform: scale(1.02);
        }

        .arch-media-label {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(13, 17, 23, 0.85);
            backdrop-filter: blur(8px);
            padding: 6px 14px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            font-size: 12px;
            color: var(--accent-teal);
            font-weight: 600;
        }

        /* 板块 4: 核心研发优势 6 卡片网格 */
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .adv-card {
            background-color: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 30px;
            transition: all 0.25s ease;
        }

        .adv-card:hover {
            border-color: var(--accent-teal);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .adv-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
        }

        .adv-badge {
            font-size: 11px;
            font-weight: 700;
            color: var(--accent-teal);
            background: rgba(0, 229, 153, 0.08);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            text-transform: uppercase;
        }

        .adv-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .adv-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 板块 5: 商业产品矩阵 3 大卡片 */
        .product-matrix-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .product-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: border-color 0.25s ease, transform 0.25s ease;
        }

        .product-card:hover {
            border-color: var(--accent-teal);
            transform: translateY(-3px);
        }

        .product-thumb {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: #1a202c;
        }

        .product-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s;
        }

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

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

        .product-tag-line {
            display: flex;
            gap: 8px;
            margin-bottom: 14px;
        }

        .prod-tag {
            font-size: 11px;
            background: rgba(240, 246, 252, 0.05);
            color: var(--text-muted);
            padding: 3px 8px;
            border-radius: var(--radius-sm);
        }

        .product-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .product-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
            flex-grow: 1;
        }

        .product-spec-table {
            border-top: 1px solid var(--border-subtle);
            padding-top: 16px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            font-size: 12px;
        }

        .spec-item-key {
            color: var(--text-muted);
            display: block;
        }

        .spec-item-val {
            color: var(--accent-teal);
            font-weight: 600;
        }

        /* 板块 6: 软硬件解耦工程哲学 (纯黑沉浸) */
        .philosophy-section {
            background-color: #05070a;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
            padding: 100px 0;
        }

        .philo-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .philo-quote {
            border-left: 3px solid var(--accent-teal);
            padding-left: 24px;
            margin-bottom: 28px;
        }

        .philo-quote h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .philo-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .philo-points {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .philo-point-item {
            display: flex;
            gap: 12px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .philo-point-item strong {
            color: var(--text-primary);
            min-width: 140px;
        }

        .philo-box-right {
            background: #0d1117;
            border: 1px solid rgba(0, 229, 153, 0.2);
            border-radius: var(--radius-sm);
            padding: 36px;
            position: relative;
        }

        .philo-box-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-teal);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .philo-stack {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .stack-layer {
            background: #161b22;
            padding: 14px 18px;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            font-size: 13px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .stack-layer.active-layer {
            border-color: var(--accent-teal);
            background: rgba(0, 229, 153, 0.05);
            color: var(--accent-teal);
            font-weight: 600;
        }

        /* 板块 7: 研发四步法交付流程 */
        .process-steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 28px;
            position: relative;
        }

        .step-index {
            font-size: 32px;
            font-weight: 900;
            color: var(--accent-teal);
            opacity: 0.7;
            margin-bottom: 12px;
            line-height: 1;
        }

        .step-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .step-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 板块 8: 核心指标数据条 */
        .metrics-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: #11161d;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 44px 32px;
        }

        .metric-item {
            text-align: center;
            border-right: 1px solid var(--border-subtle);
            padding: 0 16px;
        }

        .metric-item:last-child {
            border-right: none;
        }

        .metric-number {
            font-size: 42px;
            font-weight: 900;
            color: var(--accent-teal);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -1px;
        }

        .metric-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

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

        /* 板块 9: 落地案例双列 */
        .case-study-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .case-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .case-img-wrap {
            height: 240px;
            overflow: hidden;
            position: relative;
        }

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

        .case-content {
            padding: 32px;
        }

        .case-category-tag {
            font-size: 12px;
            font-weight: 700;
            color: var(--accent-amber);
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .case-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .case-kpi-row {
            display: flex;
            gap: 20px;
            border-top: 1px solid var(--border-subtle);
            padding-top: 16px;
        }

        .case-kpi-item span {
            display: block;
        }

        .case-kpi-val {
            font-size: 18px;
            font-weight: 800;
            color: var(--accent-teal);
        }

        .case-kpi-key {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 板块 10: 客户证言网格 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testi-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .testi-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
            position: relative;
        }

        .testi-author {
            display: flex;
            align-items: center;
            gap: 14px;
            border-top: 1px solid var(--border-subtle);
            padding-top: 18px;
        }

        .testi-avatar-placeholder {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: #21262d;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--accent-teal);
            font-size: 15px;
            border: 1px solid var(--border-subtle);
        }

        .testi-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
        }

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

        /* 板块 11: 资讯与技术白皮书摘要 (锚点内嵌交互) */
        .news-header-flex {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 40px;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            padding: 28px;
            transition: border-color 0.2s ease, transform 0.2s ease;
        }

        .news-card:hover {
            border-color: var(--accent-teal);
            transform: translateY(-2px);
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 12px;
            display: block;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 12px;
        }

        .news-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .news-meta-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-teal);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* 板块 12: FAQ 手风琴 */
        .faq-accordion-wrap {
            max-width: 920px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color 0.2s;
        }

        .faq-item[open] {
            border-color: rgba(0, 229, 153, 0.4);
        }

        .faq-summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

        .faq-summary::-webkit-details-marker {
            display: none;
        }

        .faq-icon {
            font-size: 18px;
            color: var(--accent-teal);
            transition: transform 0.2s ease;
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-body {
            padding: 0 24px 22px 24px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            margin-top: 4px;
            padding-top: 16px;
        }

        /* 板块 13: 转化收口卡片 */
        .cta-box-wrapper {
            background: linear-gradient(135deg, #111b17 0%, #0d1117 100%);
            border: 1px solid rgba(0, 229, 153, 0.35);
            border-radius: var(--radius-sm);
            padding: 56px 48px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 40px;
        }

        .cta-content-left {
            max-width: 680px;
        }

        .cta-title {
            font-size: 30px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .cta-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        .cta-action-right {
            display: flex;
            flex-direction: column;
            gap: 14px;
            flex-shrink: 0;
        }

        /* 页脚规范与合规认证 */
        .site-footer {
            background-color: #06090d;
            border-top: 1px solid var(--border-subtle);
            padding-top: 72px;
            padding-bottom: 40px;
            color: var(--text-muted);
            font-size: 13px;
        }

        .footer-top-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .footer-brand-title {
            font-size: 18px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-brand-p {
            line-height: 1.7;
            margin-bottom: 20px;
            color: var(--text-secondary);
            font-size: 13px;
        }

        .footer-col-h {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

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

        .footer-links-list a:hover {
            color: var(--accent-teal);
        }

        .cert-badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 14px;
        }

        .cert-badge {
            font-size: 11px;
            padding: 4px 8px;
            background: #161b22;
            border: 1px solid var(--border-subtle);
            border-radius: 2px;
            color: var(--text-secondary);
        }

        .footer-bottom-bar {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .copyright-text {
            color: var(--text-muted);
        }

        .icp-link {
            color: var(--text-muted);
            margin-left: 12px;
        }

        .icp-link:hover {
            color: var(--text-primary);
        }

        /* 响应式断点适配 */
        @media (max-width: 1024px) {
            .desktop-nav, .nav-cta-btn {
                display: none;
            }
            .menu-toggle {
                display: block;
            }
            .pain-grid, .advantage-grid, .product-matrix-grid, .testimonial-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps-grid, .metrics-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .metric-item {
                border-right: none;
                border-bottom: 1px solid var(--border-subtle);
                padding-bottom: 20px;
            }
            .metric-item:nth-child(3), .metric-item:nth-child(4) {
                border-bottom: none;
                padding-bottom: 0;
            }
            .footer-top-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .hero-h1 {
                font-size: 38px;
            }
            .cta-box-wrapper {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 768px) {
            .utility-bar {
                display: none;
            }
            .section-block {
                padding: 64px 0;
            }
            .hero-h1 {
                font-size: 30px;
            }
            .hero-lead-text {
                font-size: 15px;
            }
            .arch-container, .philo-grid, .case-study-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .pain-grid, .advantage-grid, .product-matrix-grid, .testimonial-grid, .news-grid, .process-steps-grid, .metrics-strip {
                grid-template-columns: 1fr;
            }
            .metric-item {
                border-bottom: 1px solid var(--border-subtle);
                padding-bottom: 16px;
            }
            .metric-item:last-child {
                border-bottom: none;
            }
            .footer-top-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions-bar {
                flex-direction: column;
                align-items: flex-start;
                width: 100%;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .section-title {
                font-size: 26px;
            }
        }

/* roulang page: category1 */
:root {
      --bg-primary: #0D1117;
      --bg-surface: #161B22;
      --bg-elevated: #21262D;
      --accent-teal: #00E599;
      --accent-teal-hover: #00D2B4;
      --accent-amber: #FF9F1C;
      --text-primary: #F0F6FC;
      --text-secondary: #C9D1D9;
      --text-muted: #8B949E;
      --border-subtle: rgba(240, 246, 252, 0.1);
      --border-hover: rgba(0, 229, 153, 0.5);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --max-width: 1280px;
      --radius-sm: 4px;
      --radius-md: 8px;
      --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.6;
    }
    body {
      overflow-x: hidden;
      background-color: var(--bg-primary);
      color: var(--text-primary);
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea, select {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部微型实用栏 */
    .utility-bar {
      background: #090d12;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 12px;
      color: var(--text-muted);
      padding: 6px 0;
    }
    .utility-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .utility-left span, .utility-right a {
      margin-right: 18px;
    }
    .utility-badge {
      display: inline-flex;
      align-items: center;
      padding: 1px 6px;
      background: rgba(0, 229, 153, 0.12);
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      font-weight: 600;
      margin-right: 8px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(13, 17, 23, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent-teal), #008f5d);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0D1117;
      font-weight: 900;
      font-size: 18px;
      box-shadow: 0 0 12px rgba(0, 229, 153, 0.4);
    }
    .logo-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.5px;
    }
    .logo-subtitle {
      font-size: 11px;
      color: var(--accent-teal);
      letter-spacing: 1px;
      display: block;
      margin-top: -2px;
      font-weight: 600;
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-teal);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-teal);
      box-shadow: 0 0 8px var(--accent-teal);
    }
    .nav-cta-btn {
      background-color: var(--accent-teal);
      color: #08130f;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: 1px solid var(--accent-teal);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .nav-cta-btn:hover {
      background-color: var(--accent-teal-hover);
      box-shadow: 0 0 16px rgba(0, 229, 153, 0.35);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* 移动端抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: #11161d;
      border-bottom: 1px solid var(--border-subtle);
      padding: 24px;
      box-shadow: 0 16px 30px rgba(0,0,0,0.8);
      z-index: 998;
    }
    .mobile-drawer.active {
      display: block;
    }
    .mobile-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .mobile-nav-list a {
      font-size: 16px;
      color: var(--text-secondary);
      display: block;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .mobile-nav-list a.active {
      color: var(--accent-teal);
      font-weight: 700;
    }

    /* 通用板块与排版 */
    .section-block {
      padding: 72px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-tag {
      display: inline-block;
      color: var(--accent-teal);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 840px;
      line-height: 1.7;
    }

    /* 板块 1: 分类专属 Header 与白皮书留资卡片 */
    .hero-spec-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 40px;
      align-items: center;
      margin-top: 16px;
    }
    .hero-h1-panel {
      background: linear-gradient(180deg, rgba(22, 27, 34, 0.8) 0%, rgba(13, 17, 23, 0.9) 100%);
      border: 1px solid var(--border-subtle);
      border-left: 3px solid var(--accent-teal);
      padding: 36px 32px;
      border-radius: var(--radius-md);
    }
    .hero-h1-panel h1 {
      font-size: 32px;
      line-height: 1.35;
      font-weight: 800;
      color: var(--text-primary);
      margin-bottom: 16px;
    }
    .hero-h1-panel p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .spec-badges-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .spec-pill {
      background: rgba(240, 246, 252, 0.05);
      border: 1px solid rgba(240, 246, 252, 0.1);
      color: var(--text-secondary);
      font-size: 13px;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
    }
    .spec-pill strong {
      color: var(--accent-teal);
    }

    .lead-book-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      position: relative;
      box-shadow: var(--shadow-card);
    }
    .book-card-header {
      display: flex;
      gap: 16px;
      align-items: center;
      margin-bottom: 20px;
    }
    .book-thumb {
      width: 76px;
      height: 98px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.1);
      flex-shrink: 0;
    }
    .book-info h3 {
      font-size: 17px;
      color: var(--text-primary);
      margin-bottom: 6px;
    }
    .book-info p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .book-toc {
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      color: var(--text-secondary);
      margin-bottom: 20px;
      line-height: 1.8;
    }
    .book-toc ul {
      list-style-type: disc;
      padding-left: 18px;
    }
    .lead-form-mini {
      display: flex;
      gap: 10px;
    }
    .lead-input {
      flex: 1;
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 10px 14px;
      font-size: 13px;
      border-radius: var(--radius-sm);
      outline: none;
    }
    .lead-input:focus {
      border-color: var(--accent-teal);
    }
    .lead-btn {
      background: var(--accent-teal);
      color: #08130f;
      border: none;
      padding: 10px 18px;
      font-size: 13px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      white-space: nowrap;
      transition: background 0.2s;
    }
    .lead-btn:hover {
      background: var(--accent-teal-hover);
    }

    /* 板块 2: 参数过滤与技术子类筛选条 */
    .filter-section {
      padding: 32px 0;
      background: #11161f;
      border-bottom: 1px solid var(--border-subtle);
    }
    .filter-wrapper {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }
    .filter-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      width: 90px;
      flex-shrink: 0;
    }
    .filter-chips {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .filter-chip {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      font-size: 13px;
      padding: 5px 14px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-chip:hover, .filter-chip.active {
      background: rgba(0, 229, 153, 0.12);
      border-color: var(--accent-teal);
      color: var(--accent-teal);
      font-weight: 600;
    }
    .filter-chip span.count {
      font-size: 11px;
      color: var(--text-muted);
      margin-left: 4px;
    }

    /* 板块 3: 核心软件产品与方案矩阵 */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 36px;
    }
    .product-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }
    .product-card:hover {
      transform: translateY(-2px);
      border-color: var(--accent-teal);
      box-shadow: 0 8px 24px rgba(0, 229, 153, 0.15);
    }
    .card-media {
      position: relative;
      width: 100%;
      height: 180px;
      overflow: hidden;
      background: #090d12;
    }
    .card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .product-card:hover .card-media img {
      transform: scale(1.04);
    }
    .media-badge {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(13, 17, 23, 0.85);
      border: 1px solid rgba(0, 229, 153, 0.4);
      color: var(--accent-teal);
      font-size: 11px;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      backdrop-filter: blur(4px);
    }
    .card-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }
    .card-content h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 10px;
    }
    .card-content p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 18px;
      flex: 1;
    }
    .card-specs {
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 12px;
      margin-bottom: 18px;
      font-size: 12px;
    }
    .spec-line {
      display: flex;
      justify-content: space-between;
      padding: 3px 0;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
    }
    .spec-line:last-child {
      border-bottom: none;
    }
    .spec-k {
      color: var(--text-muted);
    }
    .spec-v {
      color: var(--text-primary);
      font-weight: 600;
    }
    .card-footer-action {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 14px;
      border-top: 1px solid var(--border-subtle);
    }
    .doc-link-btn {
      font-size: 13px;
      color: var(--accent-teal);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .doc-link-btn:hover {
      color: var(--accent-teal-hover);
      text-decoration: underline;
    }
    .more-specs-row {
      text-align: center;
      margin-top: 40px;
    }
    .btn-load-more {
      background: transparent;
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      padding: 12px 36px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-load-more:hover {
      border-color: var(--accent-teal);
      color: var(--accent-teal);
      background: rgba(0, 229, 153, 0.05);
    }

    /* 板块 4: 分类技术规范与标准对照表 */
    .spec-table-wrap {
      margin-top: 36px;
      overflow-x: auto;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      background: var(--bg-surface);
    }
    .dense-spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 13px;
    }
    .dense-spec-table th {
      background: #11161f;
      color: var(--text-muted);
      padding: 14px 18px;
      font-weight: 700;
      border-bottom: 1px solid var(--border-subtle);
      white-space: nowrap;
    }
    .dense-spec-table td {
      padding: 14px 18px;
      color: var(--text-secondary);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      vertical-align: middle;
    }
    .dense-spec-table tr:last-child td {
      border-bottom: none;
    }
    .dense-spec-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }
    .tag-grade {
      display: inline-block;
      padding: 2px 8px;
      background: rgba(0, 229, 153, 0.1);
      color: var(--accent-teal);
      border-radius: 2px;
      font-size: 11px;
      font-weight: 700;
    }

    /* 板块 5: 部署与集成拓扑流程 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 36px;
      position: relative;
    }
    .flow-step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      position: relative;
    }
    .step-idx {
      font-size: 36px;
      font-weight: 900;
      color: rgba(0, 229, 153, 0.2);
      line-height: 1;
      margin-bottom: 14px;
    }
    .flow-step-card h3 {
      font-size: 17px;
      color: var(--text-primary);
      margin-bottom: 10px;
    }
    .flow-step-card p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .flow-features-list {
      margin-top: 14px;
      padding-left: 18px;
      font-size: 12px;
      color: var(--text-muted);
    }
    .flow-features-list li {
      margin-bottom: 6px;
    }

    /* 板块 6: 典型车型应用场景支撑区 */
    .platform-cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      margin-top: 36px;
    }
    .platform-case-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .platform-case-media {
      height: 220px;
      position: relative;
    }
    .platform-case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .platform-case-body {
      padding: 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .platform-case-body h3 {
      font-size: 20px;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .platform-case-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .kpi-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: auto;
      background: var(--bg-primary);
      border: 1px solid var(--border-subtle);
      padding: 12px;
      border-radius: var(--radius-sm);
      text-align: center;
    }
    .kpi-num {
      color: var(--accent-teal);
      font-size: 16px;
      font-weight: 700;
      display: block;
    }
    .kpi-text {
      color: var(--text-muted);
      font-size: 11px;
    }

    /* 板块 7: 分类技术答疑与工程支持 CTA */
    .category-cta-box {
      background: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
      border: 1px solid var(--border-subtle);
      border-left: 4px solid var(--accent-teal);
      border-radius: var(--radius-md);
      padding: 44px;
      display: grid;
      grid-template-columns: 1.3fr 1fr;
      gap: 36px;
      align-items: center;
      margin-top: 20px;
    }
    .cta-text-side h2 {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .cta-text-side p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .cta-interactive-form {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .cta-form-row {
      display: flex;
      gap: 10px;
    }
    .cta-input-control {
      flex: 1;
      background: #090d12;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 12px 16px;
      font-size: 14px;
      border-radius: var(--radius-sm);
      outline: none;
    }
    .cta-input-control:focus {
      border-color: var(--accent-teal);
    }
    .cta-submit-btn {
      background: var(--accent-teal);
      color: #08130f;
      border: none;
      padding: 12px 24px;
      font-size: 14px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s ease;
    }
    .cta-submit-btn:hover {
      background: var(--accent-teal-hover);
    }
    .cta-tips-line {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 统一页脚 */
    .site-footer {
      background: #080b0f;
      border-top: 1px solid var(--border-subtle);
      padding: 64px 0 24px;
      color: var(--text-secondary);
      font-size: 14px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1.1fr 1.1fr 1.3fr;
      gap: 36px;
      margin-bottom: 48px;
    }
    .footer-logo {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-primary);
      margin-bottom: 14px;
    }
    .footer-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .compliance-badges {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .badge-item {
      font-size: 12px;
      color: var(--accent-teal);
      background: rgba(0, 229, 153, 0.08);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      display: inline-block;
      width: fit-content;
      border: 1px solid rgba(0, 229, 153, 0.2);
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 18px;
    }
    .footer-link-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
    }
    .footer-link-list a {
      color: var(--text-muted);
    }
    .footer-link-list a:hover {
      color: var(--accent-teal);
    }
    .footer-contact-item {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 6px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 12px;
      color: var(--text-muted);
    }
    .footer-icp {
      color: var(--text-muted);
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .desktop-nav {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-spec-grid {
        grid-template-columns: 1fr;
      }
      .product-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .platform-cases-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .category-cta-box {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .utility-bar {
        display: none;
      }
      .section-block {
        padding: 48px 0;
      }
      .section-title {
        font-size: 24px;
      }
      .product-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-h1-panel h1 {
        font-size: 24px;
      }
      .filter-row {
        align-items: flex-start;
      }
      .cta-form-row {
        flex-direction: column;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

/* roulang page: category2 */
:root {
    --bg-primary: #0D1117;
    --bg-surface: #161B22;
    --bg-elevated: #21262D;
    --accent-teal: #00E599;
    --accent-teal-hover: #00D2B4;
    --accent-amber: #FF9F1C;
    --text-primary: #F0F6FC;
    --text-secondary: #C9D1D9;
    --text-muted: #8B949E;
    --border-subtle: rgba(240, 246, 252, 0.1);
    --border-hover: rgba(0, 229, 153, 0.5);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --max-width: 1280px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
  }
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
  }
  body {
    overflow-x: hidden;
    background-color: var(--bg-primary);
  }
  a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  button, input, textarea, select {
    font-family: inherit;
  }
  .container {
    width: 100%;
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* 顶部导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
  }
  .logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-teal), #008f5d);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0D1117;
    font-weight: 900;
    font-size: 18px;
    box-shadow: 0 0 12px rgba(0, 229, 153, 0.4);
  }
  .logo-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
  }
  .logo-subtitle {
    font-size: 11px;
    color: var(--accent-teal);
    letter-spacing: 1px;
    display: block;
    margin-top: -2px;
    font-weight: 600;
  }
  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 28px;
  }
  .nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
  }
  .nav-link:hover, .nav-link.active {
    color: var(--accent-teal);
  }
  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-teal);
    box-shadow: 0 0 8px var(--accent-teal);
  }
  .nav-cta-btn {
    background-color: var(--accent-teal);
    color: #08130f;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    border: 1px solid var(--accent-teal);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-block;
  }
  .nav-cta-btn:hover {
    background-color: var(--accent-teal-hover);
    box-shadow: 0 0 16px rgba(0, 229, 153, 0.35);
  }
  .menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
  }
  .mobile-drawer {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: #11161d;
    border-bottom: 1px solid var(--border-subtle);
    padding: 24px;
    box-shadow: 0 16px 30px rgba(0,0,0,0.8);
    z-index: 998;
  }
  .mobile-drawer.active {
    display: block;
  }
  .mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .mobile-nav-list a {
    font-size: 16px;
    color: var(--text-secondary);
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }
  .mobile-nav-list a.active {
    color: var(--accent-teal);
  }

  /* 通用板块与排版 */
  .section-block {
    padding: 80px 0;
    position: relative;
  }
  .section-alt {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
  }
  .section-header {
    margin-bottom: 40px;
  }
  .section-tag {
    display: inline-block;
    color: var(--accent-teal);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 10px;
  }
  .section-title {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 14px;
    color: var(--text-primary);
    line-height: 1.3;
  }
  .section-desc {
    color: var(--text-secondary);
    font-size: 16px;
    max-width: 820px;
    line-height: 1.7;
  }

  /* 板块 1: 分类专属 Header 紧凑工业卡片 H1 */
  .category-hero {
    padding: 56px 0 48px;
    background: radial-gradient(circle at 80% 20%, rgba(0, 229, 153, 0.08) 0%, rgba(13, 17, 23, 0) 70%);
    border-bottom: 1px solid var(--border-subtle);
  }
  .category-hero-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 40px;
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 40px;
    align-items: center;
    box-shadow: var(--shadow-card);
  }
  .hero-tag-wrap {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
  }
  .badge-tag {
    background: rgba(0, 229, 153, 0.12);
    color: var(--accent-teal);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 229, 153, 0.25);
  }
  .badge-tag-alt {
    background: rgba(255, 159, 28, 0.12);
    color: var(--accent-amber);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 159, 28, 0.25);
  }
  .category-hero h1 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 18px;
    color: var(--text-primary);
  }
  .hero-statement {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.75;
    margin-bottom: 24px;
  }
  .hero-stats-mini {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border-subtle);
  }
  .stat-mini-val {
    font-size: 22px;
    font-weight: 800;
    color: var(--accent-teal);
    font-family: monospace;
  }
  .stat-mini-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
  }
  .hero-visual-panel {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 24px;
    position: relative;
    overflow: hidden;
  }
  .panel-topline {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 16px;
    font-family: monospace;
  }
  .panel-code-box {
    background: #090d12;
    border-radius: var(--radius-sm);
    padding: 16px;
    font-family: Consolas, Monaco, "Courier New", monospace;
    font-size: 12px;
    color: #7ee787;
    line-height: 1.6;
    border: 1px solid rgba(255,255,255,0.06);
  }
  .panel-code-box span.cm-prop { color: #79c0ff; }
  .panel-code-box span.cm-val { color: #ffa657; }
  .panel-code-box span.cm-num { color: #d2a8ff; }

  /* 板块 2: 参数过滤条 */
  .filter-section {
    padding: 24px 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
  }
  .filter-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .filter-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
  }
  .filter-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    min-width: 90px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  .filter-btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
  }
  .filter-pill {
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .filter-pill:hover, .filter-pill.active {
    color: #08130f;
    background: var(--accent-teal);
    border-color: var(--accent-teal);
    font-weight: 600;
  }

  /* 板块 3: 核心软件方案网格 */
  .products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .software-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease;
  }
  .software-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent-teal);
    box-shadow: var(--shadow-card);
  }
  .card-media-box {
    height: 180px;
    position: relative;
    overflow: hidden;
    background: #080c10;
  }
  .card-media-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
  }
  .software-card:hover .card-media-box img {
    transform: scale(1.03);
  }
  .card-status-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(4px);
    color: var(--accent-teal);
    border: 1px solid var(--border-subtle);
  }
  .card-body-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
  }
  .card-chip-tag {
    font-size: 12px;
    color: var(--accent-amber);
    margin-bottom: 8px;
    font-weight: 600;
  }
  .card-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
  }
  .card-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
  }
  .card-spec-list {
    list-style: none;
    padding: 12px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 20px;
    font-size: 13px;
  }
  .card-spec-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
  }
  .card-spec-item:last-child {
    margin-bottom: 0;
  }
  .spec-label {
    color: var(--text-muted);
  }
  .spec-value {
    color: var(--text-primary);
    font-weight: 600;
    font-family: monospace;
  }
  .card-footer-action {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  .btn-doc-link {
    font-size: 13px;
    font-weight: 700;
    color: var(--accent-teal);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .btn-doc-link:hover {
    color: var(--accent-teal-hover);
    text-decoration: underline;
  }
  .load-more-wrap {
    text-align: center;
    margin-top: 48px;
  }
  .btn-load-more {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 12px 32px;
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .btn-load-more:hover {
    border-color: var(--accent-teal);
    color: var(--accent-teal);
  }

  /* 板块 4: 规范标准对照表 */
  .table-responsive-box {
    overflow-x: auto;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-surface);
  }
  .spec-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
  }
  .spec-data-table th, .spec-data-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-subtle);
  }
  .spec-data-table th {
    background: var(--bg-elevated);
    color: var(--text-muted);
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  .spec-data-table tr:last-child td {
    border-bottom: none;
  }
  .spec-data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
  }
  .status-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 13px;
  }
  .status-dot-green {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-teal);
    box-shadow: 0 0 6px var(--accent-teal);
  }

  /* 板块 5: 部署与集成流程 */
  .flow-steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    position: relative;
  }
  .step-flow-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    position: relative;
  }
  .step-num-badge {
    font-size: 14px;
    font-weight: 900;
    color: var(--accent-teal);
    font-family: monospace;
    background: rgba(0, 229, 153, 0.1);
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border: 1px solid rgba(0, 229, 153, 0.2);
  }
  .step-heading {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
  }
  .step-body {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  /* 板块 6: 车型平台支撑双列 */
  .platform-support-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .platform-box {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }
  .platform-box-img {
    height: 220px;
    position: relative;
  }
  .platform-box-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .platform-box-content {
    padding: 32px;
    flex-grow: 1;
  }
  .platform-lead {
    color: var(--accent-teal);
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 8px;
    text-transform: uppercase;
  }
  .platform-title {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 14px;
    color: var(--text-primary);
  }
  .platform-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 20px;
  }
  .platform-feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .feature-item-pill {
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
  }

  /* 板块 7: 专向技术支持与预约 CTA */
  .category-cta-section {
    padding: 80px 0;
    background: radial-gradient(circle at 50% 50%, #16222f 0%, #0D1117 100%);
    border-top: 1px solid var(--border-subtle);
  }
  .cta-panel-inner {
    background: var(--bg-surface);
    border: 1px solid var(--border-hover);
    border-radius: var(--radius-md);
    padding: 48px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
    box-shadow: 0 8px 32px rgba(0, 229, 153, 0.1);
  }
  .cta-title {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-primary);
  }
  .cta-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 24px;
  }
  .cta-action-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }
  .cta-btn-primary {
    background: var(--accent-teal);
    color: #08130f;
    font-size: 15px;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--accent-teal);
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .cta-btn-primary:hover {
    background: var(--accent-teal-hover);
    box-shadow: 0 0 16px rgba(0, 229, 153, 0.4);
  }
  .cta-btn-secondary {
    background: transparent;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .cta-btn-secondary:hover {
    border-color: var(--text-primary);
  }
  .cta-support-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 24px;
  }
  .support-lead-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent-teal);
    margin-bottom: 12px;
    text-transform: uppercase;
  }
  .support-list {
    list-style: none;
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .support-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
  }

  /* 页脚 */
  .site-footer {
    background-color: #090d12;
    border-top: 1px solid var(--border-subtle);
    padding: 64px 0 32px;
    font-size: 14px;
  }
  .footer-top {
    display: grid;    grid-template-columns: 2fr 1.2fr 1.2fr 1.6fr;
    gap: 40px;
    margin-bottom: 48px;
  }
  .footer-brand-col .footer-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .footer-desc {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.7;
    margin-bottom: 20px;
  }
  .compliance-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }
  .badge-item {
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
  }
  .footer-col-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  .footer-link-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .footer-link-list a {
    color: var(--text-muted);
    font-size: 13px;
    transition: color 0.2s ease;
  }
  .footer-link-list a:hover {
    color: var(--accent-teal);
  }
  .footer-contact-item {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 8px;
  }
  .footer-bottom {
    padding-top: 28px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--text-muted);
    font-size: 12px;
  }
  .footer-icp a {
    color: var(--text-muted);
  }
  .footer-icp a:hover {
    color: var(--text-secondary);
  }

  /* 响应式断点适配 */
  @media (max-width: 1024px) {
    .desktop-nav, .nav-cta-btn {
      display: none;
    }
    .menu-toggle {
      display: block;
    }
    .category-hero-card {
      grid-template-columns: 1fr;
      padding: 32px 24px;
    }
    .products-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .flow-steps-grid {
      grid-template-columns: 1fr;
    }
    .footer-top {
      grid-template-columns: 1fr 1fr;
    }
    .cta-panel-inner {
      grid-template-columns: 1fr;
      padding: 32px 24px;
    }
  }
  @media (max-width: 768px) {
    .products-grid {
      grid-template-columns: 1fr;
    }
    .platform-support-grid {
      grid-template-columns: 1fr;
    }
    .footer-top {
      grid-template-columns: 1fr;
    }
    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }
    .hero-stats-mini {
      grid-template-columns: 1fr;
    }
  }

/* roulang page: category3 */
:root {
      --bg-primary: #0D1117;
      --bg-surface: #161B22;
      --bg-elevated: #21262D;
      --accent-teal: #00E599;
      --accent-teal-hover: #00D2B4;
      --accent-amber: #FF9F1C;
      --text-primary: #F0F6FC;
      --text-secondary: #C9D1D9;
      --text-muted: #8B949E;
      --border-subtle: rgba(240, 246, 252, 0.1);
      --border-hover: rgba(0, 229, 153, 0.5);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --max-width: 1280px;
      --radius-sm: 4px;
      --radius-md: 8px;
      --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
    }

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

    html {
      scroll-behavior: smooth;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background-color: var(--bg-primary);
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部实用栏 */
    .utility-bar {
      background: #090d12;
      border-bottom: 1px solid rgba(240, 246, 252, 0.06);
      font-size: 13px;
      color: var(--text-muted);
      height: 36px;
      display: flex;
      align-items: center;
    }
    .utility-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .utility-left span, .utility-right a {
      margin-right: 18px;
    }
    .utility-right a:hover {
      color: var(--accent-teal);
    }
    .utility-badge {
      display: inline-flex;
      align-items: center;
      padding: 2px 8px;
      background: rgba(0, 229, 153, 0.12);
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      font-size: 11px;
      font-weight: 600;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(13, 17, 23, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent-teal), #008f5d);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0D1117;
      font-weight: 900;
      font-size: 18px;
      box-shadow: 0 0 12px rgba(0, 229, 153, 0.4);
    }
    .logo-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.5px;
    }
    .logo-subtitle {
      font-size: 11px;
      color: var(--accent-teal);
      letter-spacing: 1px;
      display: block;
      margin-top: -2px;
      font-weight: 600;
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-teal);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-teal);
      box-shadow: 0 0 8px var(--accent-teal);
    }
    .nav-cta-btn {
      background-color: var(--accent-teal);
      color: #08130f;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: 1px solid var(--accent-teal);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .nav-cta-btn:hover {
      background-color: var(--accent-teal-hover);
      box-shadow: 0 0 16px rgba(0, 229, 153, 0.35);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 108px;
      left: 0;
      width: 100%;
      background: #11161d;
      border-bottom: 1px solid var(--border-subtle);
      padding: 24px;
      box-shadow: 0 16px 30px rgba(0,0,0,0.8);
      z-index: 998;
    }
    .mobile-drawer.active {
      display: block;
    }
    .mobile-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .mobile-nav-list a {
      font-size: 16px;
      color: var(--text-secondary);
      display: block;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    /* 通用板块 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-tag {
      display: inline-block;
      color: var(--accent-teal);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-primary);
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 820px;
      line-height: 1.6;
    }

    /* 板块1：分类专有 Header (工业紧凑卡片式 H1) */
    .cat-hero-section {
      padding: 48px 0 40px;
      background: linear-gradient(180deg, rgba(22, 27, 34, 0.8) 0%, rgba(13, 17, 23, 1) 100%);
      border-bottom: 1px solid var(--border-subtle);
    }
    .cat-header-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 40px 48px;
      display: grid;
      grid-template-columns: 1.4fr 1fr;
      gap: 40px;
      align-items: center;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }
    .cat-header-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--accent-teal);
    }
    .cat-badge-line {
      display: flex;
      gap: 12px;
      align-items: center;
      margin-bottom: 16px;
      flex-wrap: wrap;
    }
    .cat-pill {
      font-size: 12px;
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      background: rgba(0, 229, 153, 0.1);
      color: var(--accent-teal);
      border: 1px solid rgba(0, 229, 153, 0.25);
      font-weight: 600;
    }
    .cat-pill-amber {
      background: rgba(255, 159, 28, 0.1);
      color: var(--accent-amber);
      border-color: rgba(255, 159, 28, 0.3);
    }
    h1.cat-main-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.25;
      margin-bottom: 16px;
    }
    .cat-main-desc {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .cat-metric-panel {
      background: var(--bg-elevated);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 24px;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .metric-unit-val {
      font-size: 28px;
      font-weight: 800;
      color: var(--accent-teal);
      line-height: 1;
      margin-bottom: 6px;
      font-feature-settings: "tnum";
    }
    .metric-unit-lbl {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块2：参数过滤条 */
    .filter-section {
      padding: 24px 0;
      background: #11161d;
      border-bottom: 1px solid var(--border-subtle);
    }
    .filter-wrapper {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 24px;
      justify-content: space-between;
    }
    .filter-group {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }
    .filter-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
      white-space: nowrap;
    }
    .filter-btn {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-btn:hover, .filter-btn.active {
      border-color: var(--accent-teal);
      color: var(--text-primary);
      background: rgba(0, 229, 153, 0.08);
    }

    /* 板块3：产品与方案列表主体 (网格) */
    .algo-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
    }
    .algo-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: border-color 0.2s ease, transform 0.2s ease;
      box-shadow: var(--shadow-card);
    }
    .algo-card:hover {
      border-color: var(--accent-teal);
      transform: translateY(-2px);
    }
    .algo-card-cover {
      position: relative;
      height: 180px;
      background: #090d12;
      overflow: hidden;
    }
    .algo-card-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.85;
      transition: opacity 0.3s ease;
    }
    .algo-card:hover .algo-card-cover img {
      opacity: 1;
    }
    .algo-chip-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(13, 17, 23, 0.85);
      backdrop-filter: blur(4px);
      padding: 3px 8px;
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-subtle);
    }
    .algo-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .algo-card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 10px;
      line-height: 1.35;
    }
    .algo-card-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }
    .algo-specs-list {
      list-style: none;
      padding: 12px 0;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      margin-bottom: 18px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .algo-spec-item {
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
    }
    .algo-spec-item span:last-child {
      color: var(--text-primary);
      font-weight: 600;
    }
    .algo-card-foot {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .algo-doc-link {
      font-size: 13px;
      color: var(--accent-teal);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .algo-doc-link:hover {
      text-decoration: underline;
    }
    .load-more-wrap {
      text-align: center;
      margin-top: 48px;
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 12px 32px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-secondary:hover {
      border-color: var(--accent-teal);
      color: var(--accent-teal);
      background: rgba(0, 229, 153, 0.05);
    }

    /* 板块4：技术规范对照表 */
    .spec-table-wrap {
      margin-top: 36px;
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      overflow-x: auto;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
      min-width: 720px;
    }
    .spec-table th {
      background: #1c222c;
      color: var(--text-primary);
      font-weight: 700;
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 13px;
      letter-spacing: 0.5px;
    }
    .spec-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(240, 246, 252, 0.05);
      color: var(--text-secondary);
      vertical-align: middle;
    }
    .spec-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }
    .status-tag-teal {
      display: inline-block;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      background: rgba(0, 229, 153, 0.15);
      color: var(--accent-teal);
      font-size: 12px;
      font-weight: 600;
    }

    /* 板块5：部署与集成拓扑流程 (3步极简) */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 40px;
      position: relative;
    }
    .flow-step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 32px 28px;
      position: relative;
    }
    .step-counter {
      width: 40px;
      height: 40px;
      background: var(--bg-elevated);
      border: 1px solid var(--accent-teal);
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .step-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .step-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* 板块6：典型车型应用场景支撑区 (双列图文) */
    .platform-cards-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      margin-top: 40px;
    }
    .platform-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .platform-card-img {
      height: 220px;
      overflow: hidden;
      background: #090d12;
    }
    .platform-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .platform-card-content {
      padding: 32px;
      flex: 1;
    }
    .platform-card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .platform-card-text {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .feature-point-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .feature-point-item {
      font-size: 13px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feature-point-item::before {
      content: "•";
      color: var(--accent-teal);
      font-size: 18px;
      line-height: 1;
    }

    /* 板块7：分类专向技术支持与CTA */
    .cat-cta-box {
      background: linear-gradient(135deg, #161b22 0%, #21262d 100%);
      border: 1px solid var(--border-hover);
      border-radius: var(--radius-md);
      padding: 56px 48px;
      display: grid;
      grid-template-columns: 1.3fr 1fr;
      gap: 40px;
      align-items: center;
      box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    }
    .cat-cta-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .cat-cta-desc {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.65;
    }
    .form-compact {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .form-input-group {
      display: flex;
      gap: 10px;
    }
    .form-input {
      flex: 1;
      background: #0d1117;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
    }
    .form-input:focus {
      border-color: var(--accent-teal);
    }
    .cta-submit-btn {
      background: var(--accent-teal);
      color: #08130f;
      border: none;
      padding: 12px 24px;
      font-weight: 700;
      font-size: 14px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background-color 0.2s ease;
      white-space: nowrap;
    }
    .cta-submit-btn:hover {
      background-color: var(--accent-teal-hover);
    }
    .form-note {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 页脚 */
    .site-footer {
      background-color: #090d12;
      border-top: 1px solid var(--border-subtle);
      padding: 72px 0 32px;
      font-size: 14px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
      gap: 40px;
      margin-bottom: 56px;
    }
    .footer-logo {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 14px;
    }
    .footer-desc {
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-size: 13px;
    }
    .compliance-badges {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .badge-item {
      font-size: 12px;
      color: var(--accent-teal);
      opacity: 0.9;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }
    .footer-link-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-link-list a {
      color: var(--text-muted);
      font-size: 13px;
    }
    .footer-link-list a:hover {
      color: var(--accent-teal);
    }
    .footer-contact-item {
      color: var(--text-muted);
      margin-bottom: 8px;
      font-size: 13px;
      line-height: 1.5;
    }
    .footer-bottom {
      border-top: 1px solid rgba(240, 246, 252, 0.06);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-muted);
      font-size: 12px;
      flex-wrap: wrap;
      gap: 12px;
    }
    .footer-icp a:hover {
      color: var(--text-primary);
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .desktop-nav {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .cat-header-card {
        grid-template-columns: 1fr;
        padding: 32px;
        gap: 28px;
      }
      .algo-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .platform-cards-grid {
        grid-template-columns: 1fr;
      }
      .cat-cta-box {
        grid-template-columns: 1fr;
        padding: 36px 28px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .utility-bar {
        display: none;
      }
      .site-header {
        top: 0;
      }
      .mobile-drawer {
        top: 72px;
      }
      .algo-grid {
        grid-template-columns: 1fr;
      }
      .filter-wrapper {
        flex-direction: column;
        align-items: flex-start;
      }
      .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .cat-metric-panel {
        grid-template-columns: 1fr;
      }
      .section-block {
        padding: 56px 0;
      }
      .h1.cat-main-title {
        font-size: 26px;
      }
    }

/* roulang page: category4 */
:root {
  --bg-primary: #0D1117;
  --bg-surface: #161B22;
  --bg-elevated: #21262D;
  --accent-teal: #00E599;
  --accent-teal-hover: #00D2B4;
  --accent-amber: #FF9F1C;
  --text-primary: #F0F6FC;
  --text-secondary: #C9D1D9;
  --text-muted: #8B949E;
  --border-subtle: rgba(240, 246, 252, 0.1);
  --border-hover: rgba(0, 229, 153, 0.5);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1280px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
}
body {
  overflow-x: hidden;
  background-color: var(--bg-primary);
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button, input, textarea, select {
  font-family: inherit;
}
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(13, 17, 23, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-teal), #008f5d);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0D1117;
  font-weight: 900;
  font-size: 18px;
  box-shadow: 0 0 12px rgba(0, 229, 153, 0.4);
}
.logo-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}
.logo-subtitle {
  font-size: 11px;
  color: var(--accent-teal);
  letter-spacing: 1px;
  display: block;
  margin-top: -2px;
  font-weight: 600;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 0;
  position: relative;
}
.nav-link:hover, .nav-link.active {
  color: var(--accent-teal);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
}
.nav-cta-btn {
  background-color: var(--accent-teal);
  color: #08130f;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-teal);
  cursor: pointer;
  transition: all 0.2s ease;
}
.nav-cta-btn:hover {
  background-color: var(--accent-teal-hover);
  box-shadow: 0 0 16px rgba(0, 229, 153, 0.35);
}
.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.mobile-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: #11161d;
  border-bottom: 1px solid var(--border-subtle);
  padding: 24px;
  box-shadow: 0 16px 30px rgba(0,0,0,0.8);
  z-index: 998;
}
.mobile-drawer.active {
  display: block;
}
.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.mobile-nav-list a {
  font-size: 16px;
  color: var(--text-secondary);
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.section-block {
  padding: 80px 0;
  position: relative;
}
.section-alt {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.section-header {
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  color: var(--accent-teal);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 12px;
  max-width: 820px;
}

/* 分类页定制版式 */
.cat-hero-panel {
  background: linear-gradient(180deg, rgba(22, 27, 34, 0.95) 0%, rgba(13, 17, 23, 0.9) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 48px 40px;
  margin-top: 36px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.cat-hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
  align-items: center;
}
.cat-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 153, 0.1);
  color: var(--accent-teal);
  border: 1px solid rgba(0, 229, 153, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.cat-hero-h1 {
  font-size: 38px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}
.cat-hero-lead {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 28px;
}
.cat-hero-kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}
.cat-kpi-item h4 {
  font-size: 26px;
  font-weight: 800;
  color: var(--accent-teal);
  font-feature-settings: "tnum";
}
.cat-kpi-item p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}
.cat-hero-visual {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 8px 30px rgba(0,0,0,0.6);
}

/* 过滤筛选条 */
.filter-bar-wrap {
  margin-top: 32px;
  padding: 20px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.filter-group-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.filter-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 90px;
}
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-chip {
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.2s ease;
}
.filter-chip:hover {
  color: var(--text-primary);
  border-color: rgba(240, 246, 252, 0.3);
}
.filter-chip.active {
  background: rgba(0, 229, 153, 0.15);
  color: var(--accent-teal);
  border-color: var(--accent-teal);
  font-weight: 600;
}

/* 软件产品卡片网格 */
.cat-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}
.cat-card-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.cat-card-item:hover {
  transform: translateY(-3px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}
.cat-card-header {
  margin-bottom: 16px;
}
.cat-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.cat-chip-tag {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-teal);
  background: rgba(0, 229, 153, 0.1);
  padding: 2px 8px;
  border-radius: 2px;
}
.cat-chip-level {
  font-size: 11px;
  color: var(--accent-amber);
  font-weight: 600;
}
.cat-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.4;
}
.cat-card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
}
.cat-specs-list {
  list-style: none;
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 20px;
  font-size: 12px;
}
.cat-specs-list li {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255,255,255,0.03);
}
.cat-specs-list li:last-child {
  border-bottom: none;
}
.cat-specs-list .spec-k {
  color: var(--text-muted);
}
.cat-specs-list .spec-v {
  color: var(--text-primary);
  font-weight: 600;
  font-family: monospace;
}
.cat-card-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 100%;
  padding: 10px;
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: all 0.2s ease;
}
.cat-card-btn:hover {
  background: rgba(0, 229, 153, 0.1);
  color: var(--accent-teal);
  border-color: var(--accent-teal);
}
.cat-load-more-wrap {
  text-align: center;
  margin-top: 48px;
}
.cat-load-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}
.cat-load-btn:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  background: rgba(0, 229, 153, 0.05);
}

/* 技术规范与标准对照表 */
.specs-table-container {
  overflow-x: auto;
  margin-top: 32px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}
.specs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}
.specs-table th {
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-weight: 700;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}
.specs-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  line-height: 1.5;
}
.specs-table tr:last-child td {
  border-bottom: none;
}
.specs-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}
.spec-tag-green {
  display: inline-block;
  color: var(--accent-teal);
  background: rgba(0, 229, 153, 0.1);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
}

/* 拓扑流程三步法 */
.topo-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
  position: relative;
}
.topo-step-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  position: relative;
}
.topo-step-idx {
  font-size: 40px;
  font-weight: 900;
  color: rgba(0, 229, 153, 0.25);
  line-height: 1;
  margin-bottom: 16px;
  font-family: monospace;
}
.topo-step-card h4 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 10px;
  font-weight: 700;
}
.topo-step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 车型应用场景对比 */
.platform-duo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 36px;
}
.platform-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.platform-card-img {
  height: 220px;
  width: 100%;
  overflow: hidden;
}
.platform-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.platform-card:hover .platform-card-img img {
  transform: scale(1.03);
}
.platform-card-body {
  padding: 28px;
  flex: 1;
}
.platform-card-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.platform-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}
.platform-feature-list {
  list-style: none;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.platform-feature-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.platform-feature-list li::before {
  content: '✓';
  color: var(--accent-teal);
  font-weight: bold;
}

/* 预约转化 CTA */
.cat-cta-box {
  background: linear-gradient(135deg, #161B22 0%, #1a222d 100%);
  border: 1px solid var(--accent-teal);
  border-radius: var(--radius-md);
  padding: 56px 48px;
  box-shadow: 0 10px 40px rgba(0, 229, 153, 0.1);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}
.cat-cta-text h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 14px;
}
.cat-cta-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.cat-cta-form {
  background: var(--bg-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.cat-cta-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 14px;
}
.cat-cta-input:focus {
  outline: none;
  border-color: var(--accent-teal);
}
.cat-submit-btn {
  width: 100%;
  background: var(--accent-teal);
  color: #08130f;
  font-weight: 700;
  font-size: 14px;
  padding: 12px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.2s ease;
}
.cat-submit-btn:hover {
  background: var(--accent-teal-hover);
}

/* 页脚样式复用 */
.site-footer {
  background: #080B0F;
  border-top: 1px solid var(--border-subtle);
  padding: 72px 0 32px 0;
  margin-top: 80px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand-col .footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.footer-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}
.compliance-badges {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.badge-item {
  font-size: 11px;
  color: var(--accent-teal);
  background: rgba(0, 229, 153, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  display: inline-block;
  width: fit-content;
  border: 1px solid rgba(0, 229, 153, 0.2);
}
.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-link-list a {
  font-size: 13.5px;
  color: var(--text-secondary);
}
.footer-link-list a:hover {
  color: var(--accent-teal);
}
.footer-contact-item {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .desktop-nav {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .cat-hero-grid {
    grid-template-columns: 1fr;
  }
  .cat-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .specs-table-container {
    overflow-x: auto;
  }
  .platform-duo-grid {
    grid-template-columns: 1fr;
  }
  .cat-cta-box {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .section-block {
    padding: 56px 0;
  }
  .cat-hero-panel {
    padding: 32px 20px;
  }
  .cat-hero-h1 {
    font-size: 28px;
  }
  .cat-cards-grid {
    grid-template-columns: 1fr;
  }
  .topo-steps-grid {
    grid-template-columns: 1fr;
  }
  .cat-hero-kpis {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* roulang page: category5 */
:root {
      --bg-primary: #0D1117;
      --bg-surface: #161B22;
      --bg-elevated: #21262D;
      --accent-teal: #00E599;
      --accent-teal-hover: #00D2B4;
      --accent-amber: #FF9F1C;
      --text-primary: #F0F6FC;
      --text-secondary: #C9D1D9;
      --text-muted: #8B949E;
      --border-subtle: rgba(240, 246, 252, 0.1);
      --border-hover: rgba(0, 229, 153, 0.5);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --max-width: 1280px;
      --radius-sm: 4px;
      --radius-md: 8px;
      --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.35);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.6;
    }
    body {
      overflow-x: hidden;
      background-color: var(--bg-primary);
      min-height: 100vh;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease, border-color 0.2s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea, select {
      font-family: inherit;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 实用工程提示条 */
    .utility-bar {
      background: #090d13;
      border-bottom: 1px solid rgba(240, 246, 252, 0.06);
      font-size: 12px;
      color: var(--text-muted);
      padding: 8px 0;
    }
    .utility-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .utility-group {
      display: flex;
      align-items: center;
      gap: 18px;
    }
    .utility-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .utility-tag {
      background: rgba(0, 229, 153, 0.12);
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      padding: 1px 6px;
      font-weight: 600;
    }

    /* 站点统一导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(13, 17, 23, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--accent-teal), #008f5d);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0D1117;
      font-weight: 900;
      font-size: 18px;
      box-shadow: 0 0 12px rgba(0, 229, 153, 0.4);
    }
    .logo-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.5px;
    }
    .logo-subtitle {
      font-size: 11px;
      color: var(--accent-teal);
      letter-spacing: 1px;
      display: block;
      margin-top: -2px;
      font-weight: 600;
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 0;
      position: relative;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--accent-teal);
    }
    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--accent-teal);
      box-shadow: 0 0 8px var(--accent-teal);
    }
    .nav-cta-btn {
      background-color: var(--accent-teal);
      color: #08130f;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: 1px solid var(--accent-teal);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .nav-cta-btn:hover {
      background-color: var(--accent-teal-hover);
      box-shadow: 0 0 16px rgba(0, 229, 153, 0.35);
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-subtle);
      color: var(--text-primary);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* 移动端抽屉 */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: #11161d;
      border-bottom: 1px solid var(--border-subtle);
      padding: 24px;
      box-shadow: 0 16px 30px rgba(0,0,0,0.8);
      z-index: 998;
    }
    .mobile-drawer.active {
      display: block;
    }
    .mobile-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .mobile-nav-list a {
      font-size: 16px;
      color: var(--text-secondary);
      display: block;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .mobile-nav-list a.active {
      color: var(--accent-teal);
      font-weight: 700;
    }

    /* 通用板块与排版 */
    .section-block {
      padding: 80px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      color: var(--accent-teal);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 10px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 860px;
      line-height: 1.7;
    }

    /* 板块1：分类专属 Header（主卡+交错侧卡） */
    .category-hero {
      padding: 60px 0 70px;
      background: radial-gradient(circle at top right, rgba(0, 229, 153, 0.08), transparent 60%),
                  radial-gradient(circle at bottom left, rgba(255, 159, 28, 0.05), transparent 50%),
                  var(--bg-primary);
      border-bottom: 1px solid var(--border-subtle);
    }
    .stack-hero-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr;
      gap: 32px;
      align-items: stretch;
    }
    .hero-main-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 44px;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .hero-main-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--accent-teal);
    }
    .hero-category-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      font-weight: 700;
      color: var(--accent-teal);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 16px;
    }
    .category-h1 {
      font-size: 36px;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-statement {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 28px;
    }
    .hero-metric-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid var(--border-subtle);
    }
    .metric-value {
      font-size: 24px;
      font-weight: 800;
      color: var(--accent-teal);
      line-height: 1.2;
    }
    .metric-name {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 侧卡堆叠交错区域 */
    .hero-side-stack {
      display: flex;
      flex-direction: column;
      gap: 20px;
      justify-content: center;
    }
    .side-stack-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: transform 0.2s ease, border-color 0.2s ease;
      position: relative;
    }
    .side-stack-card:hover {
      transform: translateY(-2px);
      border-color: var(--border-hover);
    }
    .side-stack-card.card-offset {
      margin-left: 20px;
      border-left: 2px solid var(--accent-amber);
    }
    .stack-card-badge {
      display: inline-block;
      padding: 2px 8px;
      background: rgba(240, 246, 252, 0.06);
      border-radius: var(--radius-sm);
      color: var(--accent-teal);
      font-size: 11px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .stack-card-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 8px;
    }
    .stack-card-text {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* 板块2：筛选与参数过滤条 */
    .filter-panel {
      padding: 28px 0;
      background: #11161d;
      border-bottom: 1px solid var(--border-subtle);
    }
    .filter-container {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .filter-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      min-width: 90px;
      letter-spacing: 0.5px;
    }
    .filter-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .filter-pill {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      font-size: 13px;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .filter-pill:hover, .filter-pill.active {
      background: rgba(0, 229, 153, 0.1);
      border-color: var(--accent-teal);
      color: var(--accent-teal);
    }

    /* 板块3：软件产品与方案主体（网格） */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 40px;
    }
    .arch-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    }
    .arch-card:hover {
      border-color: var(--accent-teal);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    }
    .arch-card-media {
      position: relative;
      height: 180px;
      overflow: hidden;
      background: #090d13;
    }
    .arch-card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .arch-card:hover .arch-card-media img {
      transform: scale(1.04);
    }
    .arch-tag-chip {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(13, 17, 23, 0.85);
      border: 1px solid rgba(0, 229, 153, 0.3);
      color: var(--accent-teal);
      font-size: 11px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      backdrop-filter: blur(4px);
    }
    .arch-card-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .arch-card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .arch-card-desc {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 18px;
      flex-grow: 1;
    }
    .spec-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 18px;
    }
    .spec-item {
      background: rgba(240, 246, 252, 0.05);
      color: var(--text-muted);
      font-size: 11px;
      padding: 2px 6px;
      border-radius: 2px;
      border: 1px solid rgba(240, 246, 252, 0.08);
    }
    .arch-card-footer {
      padding-top: 14px;
      border-top: 1px solid var(--border-subtle);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .action-doc-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--accent-teal);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .action-doc-link:hover {
      text-decoration: underline;
    }
    .load-more-wrap {
      text-align: center;
      margin-top: 20px;
    }
    .btn-secondary-outline {
      display: inline-block;
      padding: 12px 36px;
      background: transparent;
      border: 1px solid var(--accent-teal);
      color: var(--accent-teal);
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 700;
      cursor: pointer;
      transition: all 0.2s ease;
    }
    .btn-secondary-outline:hover {
      background: rgba(0, 229, 153, 0.1);
      box-shadow: 0 0 16px rgba(0, 229, 153, 0.2);
    }

    /* 板块4：技术规范与标准对照表 */
    .table-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-card);
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
      min-width: 720px;
    }
    .spec-table th {
      background: #1a202c;
      color: var(--text-primary);
      padding: 16px 20px;
      font-weight: 700;
      border-bottom: 2px solid var(--border-subtle);
      white-space: nowrap;
    }
    .spec-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
      color: var(--text-secondary);
      vertical-align: top;
    }
    .spec-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }
    .status-badge {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 2px;
      font-size: 11px;
      font-weight: 700;
    }
    .badge-pass {
      background: rgba(0, 229, 153, 0.15);
      color: var(--accent-teal);
      border: 1px solid rgba(0, 229, 153, 0.4);
    }
    .badge-iso {
      background: rgba(255, 159, 28, 0.15);
      color: var(--accent-amber);
      border: 1px solid rgba(255, 159, 28, 0.4);
    }

    /* 板块5：部署与集成拓扑流程 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      position: relative;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      position: relative;
      overflow: hidden;
    }
    .step-card::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--border-subtle);
      transition: background 0.3s ease;
    }
    .step-card:hover::after {
      background: var(--accent-teal);
    }
    .step-serial {
      font-size: 32px;
      font-weight: 900;
      color: var(--accent-teal);
      line-height: 1;
      margin-bottom: 16px;
      opacity: 0.9;
    }
    .step-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .step-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* 板块6：典型车型应用场景支撑区 */
    .scenario-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .scenario-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .scenario-img-wrap {
      height: 220px;
      overflow: hidden;
      background: #090d13;
    }
    .scenario-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .scenario-content {
      padding: 32px;
      flex-grow: 1;
    }
    .scenario-badge {
      font-size: 11px;
      font-weight: 700;
      color: var(--accent-amber);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .scenario-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .scenario-desc {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .scenario-params-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
    }
    .scenario-params-list li {
      font-size: 13px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .scenario-params-list li span {
      color: var(--text-primary);
      font-weight: 600;
    }

    /* 板块7：专向技术答疑与工程支持 CTA */
    .cta-banner {
      background: linear-gradient(135deg, #161b22 0%, #0d1117 100%);
      border: 1px solid rgba(0, 229, 153, 0.3);
      border-radius: var(--radius-md);
      padding: 56px 48px;
      position: relative;
      overflow: hidden;
    }
    .cta-banner::after {
      content: '';
      position: absolute;
      top: -50%;
      right: -10%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(0, 229, 153, 0.1) 0%, transparent 70%);
      pointer-events: none;
    }
    .cta-layout {
      display: grid;
      grid-template-columns: 1.3fr 1fr;
      gap: 40px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .cta-heading {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-primary);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .cta-subtext {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .cta-points-row {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .cta-point-tag {
      font-size: 12px;
      color: var(--accent-teal);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .cta-form-box {
      background: rgba(13, 17, 23, 0.9);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 28px;
    }
    .cta-input-group {
      margin-bottom: 16px;
    }
    .cta-label {
      display: block;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 6px;
      font-weight: 600;
    }
    .cta-input {
      width: 100%;
      background: var(--bg-surface);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      padding: 10px 14px;
      color: var(--text-primary);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
    }
    .cta-input:focus {
      border-color: var(--accent-teal);
    }
    .cta-submit-btn {
      width: 100%;
      background: var(--accent-teal);
      color: #08130f;
      border: none;
      padding: 12px;
      font-size: 15px;
      font-weight: 800;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.2s ease;
      margin-top: 8px;
    }
    .cta-submit-btn:hover {
      background: var(--accent-teal-hover);
      box-shadow: 0 0 16px rgba(0, 229, 153, 0.4);
    }

    /* 站点通用 Footer 样式 */
    .site-footer {
      background: #080b0f;
      border-top: 1px solid var(--border-subtle);
      padding: 64px 0 32px;
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(240, 246, 252, 0.08);
    }
    .footer-logo {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-primary);
      margin-bottom: 14px;
    }
    .footer-desc {
      line-height: 1.7;
      color: var(--text-secondary);
      margin-bottom: 20px;
    }
    .compliance-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .badge-item {
      background: rgba(240, 246, 252, 0.05);
      border: 1px solid rgba(240, 246, 252, 0.1);
      padding: 3px 8px;
      border-radius: 2px;
      font-size: 11px;
      color: var(--text-muted);
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 18px;
    }
    .footer-link-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-link-list a:hover {
      color: var(--accent-teal);
    }
    .footer-contact-item {
      margin-bottom: 10px;
      line-height: 1.6;
    }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      padding-top: 32px;
      font-size: 12px;
    }
    .footer-cert-tags {
      display: flex;
      gap: 16px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .desktop-nav, .nav-cta-btn {
        display: none;
      }
      .menu-toggle {
        display: inline-flex;
      }
      .stack-hero-grid {
        grid-template-columns: 1fr;
      }
      .side-stack-card.card-offset {
        margin-left: 0;
      }
      .products-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .cta-layout {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .utility-bar {
        display: none;
      }
      .category-h1 {
        font-size: 26px;
      }
      .hero-main-card {
        padding: 24px;
      }
      .hero-metric-strip {
        grid-template-columns: 1fr;
      }
      .products-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .scenario-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .cta-banner {
        padding: 32px 20px;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }