/* roulang page: index */
/* ============================================================
           南宫电子PG官网 - 全局设计系统
           ============================================================ */
        :root {
            --bg: #0D1117;
            --surface: #161B22;
            --surface-2: #1A2029;
            --border: #21262D;
            --border-strong: #2E353D;
            --primary: #00D9A6;
            --primary-hover: #00C093;
            --primary-soft: rgba(0, 217, 166, 0.08);
            --accent: #FF4A8D;
            --success: #2EE66F;
            --warning: #FFB547;
            --text-main: #E6EDF3;
            --text-secondary: #8B949E;
            --text-muted: #5C6770;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 6px;
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 217, 166, 0.25);
            --transition: all 0.16s ease;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 0.95rem;
            font-feature-settings: "tnum";
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--primary);
        }

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

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

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

        .section-padding {
            padding: 80px 0;
        }

        /* 区块标题 */
        .section-header {
            display: flex;
            flex-direction: column;
            margin-bottom: 32px;
        }

        .section-header .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text-main);
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            margin-bottom: 0;
        }

        .section-header .section-subtitle {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 12px;
            padding-left: 20px;
        }

        /* ============================================================
           侧栏导航
           ============================================================ */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: 260px;
            height: 100vh;
            background: var(--bg);
            border-right: 1px solid var(--border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .sidebar-brand {
            height: 72px;
            padding: 0 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--primary-soft);
            border: 1px solid rgba(0, 217, 166, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 800;
            font-size: 15px;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

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

        .brand-text .brand-en {
            color: var(--text-muted);
            font-size: 11px;
            letter-spacing: 0.08em;
        }

        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            position: relative;
            transition: var(--transition);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
        }

        .sidebar-nav .nav-link i {
            font-size: 18px;
            width: 20px;
            text-align: center;
            transition: var(--transition);
        }

        .sidebar-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.03);
        }

        .sidebar-nav .nav-link:hover::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            background: var(--primary);
            border-radius: 0 2px 2px 0;
        }

        .sidebar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-soft);
        }

        .sidebar-nav .nav-link.active::before {
            content: '';
            position: absolute;
            left: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--primary);
            border-radius: 0 2px 2px 0;
        }

        .sidebar-nav .nav-link.active i {
            color: var(--primary);
        }

        .sidebar-bottom {
            padding: 16px 20px;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.9;
            flex-shrink: 0;
        }

        .sidebar-bottom .contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 4px;
        }

        .sidebar-bottom .contact-item i {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ============================================================
           移动端顶部导航
           ============================================================ */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            height: 64px;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }

        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .mobile-header .mobile-brand .brand-icon {
            width: 34px;
            height: 34px;
            font-size: 13px;
            border-radius: 6px;
        }

        .mobile-header .mobile-brand span {
            font-weight: 700;
            font-size: 16px;
            color: var(--text-main);
        }

        .btn-mobile-menu {
            background: transparent;
            border: 1px solid var(--border-strong);
            border-radius: 8px;
            color: var(--text-main);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            transition: var(--transition);
        }

        .btn-mobile-menu:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .mobile-offcanvas {
            background: var(--surface) !important;
            width: 300px !important;
        }

        .mobile-offcanvas .offcanvas-header {
            border-bottom: 1px solid var(--border);
            padding: 16px 20px;
        }

        .mobile-offcanvas .btn-close-white {
            filter: invert(1) grayscale(100%) brightness(200%);
            opacity: 0.8;
        }

        .mobile-nav-links {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-nav-links .mobile-nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .mobile-nav-links .mobile-nav-link i {
            font-size: 18px;
        }

        .mobile-nav-links .mobile-nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.03);
        }

        .mobile-nav-links .mobile-nav-link.active {
            color: var(--primary);
            background: var(--primary-soft);
            border-color: rgba(0, 217, 166, 0.2);
        }

        /* ============================================================
           主内容区
           ============================================================ */
        .main-content {
            margin-left: 260px;
            min-height: 100vh;
        }

        /* ============================================================
           Hero 首屏
           ============================================================ */
        .hero-section {
            min-height: 560px;
            background: linear-gradient(90deg, rgba(13, 17, 23, 0.95) 20%, rgba(13, 17, 23, 0.75) 60%, rgba(13, 17, 23, 0.4)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border: 1px solid rgba(0, 217, 166, 0.5);
            border-radius: 999px;
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(0, 217, 166, 0.05);
            margin-bottom: 24px;
        }

        .hero-badge i {
            font-size: 14px;
        }

        .hero-title {
            font-size: clamp(2rem, 4.5vw, 3.25rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 20px;
        }

        .hero-title .highlight {
            color: var(--primary);
            text-shadow: 0 0 20px rgba(0, 217, 166, 0.4);
        }

        .hero-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 460px;
            margin-bottom: 32px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .hero-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .hero-tags .chip {
            padding: 5px 14px;
            border: 1px solid var(--border-strong);
            border-radius: 999px;
            font-size: 0.8125rem;
            color: #C9D1D9;
            background: rgba(13, 17, 23, 0.6);
        }

        .hero-product {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 40px 0;
        }

        .hero-product .ring {
            position: absolute;
            width: 340px;
            height: 340px;
            border: 1px dashed rgba(0, 217, 166, 0.4);
            border-radius: 50%;
            animation: spin 30s linear infinite;
            pointer-events: none;
        }

        .hero-product .ring::after {
            content: '';
            position: absolute;
            top: -6px;
            left: 50%;
            width: 12px;
            height: 12px;
            background: var(--primary);
            border-radius: 50%;
            box-shadow: 0 0 20px rgba(0, 217, 166, 0.8);
        }

        .hero-product .hero-product-img {
            position: relative;
            z-index: 2;
            width: 320px;
            height: 320px;
            border-radius: 16px;
            object-fit: cover;
            box-shadow: 0 0 48px rgba(0, 217, 166, 0.2), 0 8px 32px rgba(0, 0, 0, 0.4);
            border: 1px solid rgba(0, 217, 166, 0.25);
        }

        @keyframes spin {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        /* ============================================================
           数据信任条
           ============================================================ */
        .stats-bar {
            border-bottom: 1px solid var(--border);
            background: var(--bg);
            padding: 36px 0;
        }

        .stats-bar .stat-col {
            text-align: center;
            padding: 8px 16px;
            position: relative;
        }

        .stats-bar .stat-col:not(:last-child)::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 48px;
            background: var(--border);
        }

        .stats-bar .stat-number {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
            line-height: 1.3;
        }

        .stats-bar .stat-label {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ============================================================
           按钮体系
           ============================================================ */
        .btn-primary-custom {
            background: var(--primary);
            color: var(--bg);
            font-weight: 700;
            padding: 0.875rem 1.75rem;
            border-radius: 6px;
            border: none;
            font-size: 0.9375rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary-custom:hover {
            background: var(--primary-hover);
            color: var(--bg);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 217, 166, 0.25);
        }

        .btn-primary-custom:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 217, 166, 0.3);
        }

        .btn-outline-custom {
            background: transparent;
            border: 1px solid var(--border-strong);
            color: var(--text-main);
            font-weight: 500;
            padding: 0.75rem 1.5rem;
            border-radius: 6px;
            font-size: 0.9375rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 217, 166, 0.05);
        }

        .btn-outline-custom:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(0, 217, 166, 0.15);
        }

        .btn-small-outline {
            background: transparent;
            border: 1px solid var(--border-strong);
            color: var(--text-main);
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.8125rem;
            transition: var(--transition);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn-small-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 217, 166, 0.05);
        }

        /* ============================================================
           产品卡片
           ============================================================ */
        .product-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .product-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 217, 166, 0.6);
            box-shadow: var(--shadow-hover);
        }

        .product-card .product-img-wrap {
            aspect-ratio: 4/3;
            background: var(--bg);
            overflow: hidden;
            position: relative;
        }

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

        .product-card:hover .product-img-wrap img {
            transform: scale(1.03);
        }

        .product-card .product-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .product-card .product-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }

        .product-card .product-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .product-card .product-spec {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.5;
        }

        .product-card .product-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }

        .product-card .product-price {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--primary);
        }

        .product-card .product-price del {
            font-size: 0.8125rem;
            color: var(--text-muted);
            margin-left: 6px;
            font-weight: 400;
        }

        /* ============================================================
           交错图文区
           ============================================================ */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 64px;
        }

        .feature-row:last-child {
            margin-bottom: 0;
        }

        .feature-row.reversed {
            flex-direction: row-reverse;
        }

        .feature-row .feature-image {
            flex: 1;
            border-radius: 16px;
            overflow: hidden;
            position: relative;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }

        .feature-row .feature-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(0, 217, 166, 0.12), transparent 50%);
            pointer-events: none;
        }

        .feature-row .feature-image img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .feature-row .feature-content {
            flex: 1;
        }

        .feature-row .feature-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .feature-row .feature-content p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .feature-row .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }

        .feature-row .feature-tags .chip {
            padding: 4px 14px;
            border: 1px solid var(--border-strong);
            border-radius: 999px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.02);
            transition: var(--transition);
        }

        .feature-row .feature-tags .chip:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ============================================================
           资讯 / CMS列表区
           ============================================================ */
        .news-section {
            background: var(--bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            background: rgba(255, 255, 255, 0.01);
        }

        .news-item .news-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 80px;
            border-radius: 8px;
            overflow: hidden;
            display: block;
            background: var(--surface-2);
        }

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

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

        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-item .news-content h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .news-item .news-content h3 a {
            color: var(--text-main);
        }

        .news-item .news-content h3 a:hover {
            color: var(--primary);
        }

        .news-item .news-content p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .news-item .news-meta .news-badge {
            display: inline-block;
            padding: 2px 10px;
            border: 1px solid rgba(0, 217, 166, 0.4);
            border-radius: 999px;
            font-size: 0.75rem;
            color: var(--primary);
            background: rgba(0, 217, 166, 0.05);
        }

        .news-empty {
            border: 1px dashed var(--border-strong);
            border-radius: 16px;
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
        }

        .news-empty i {
            font-size: 48px;
            display: block;
            margin-bottom: 12px;
            color: var(--border-strong);
        }

        .news-empty p {
            font-size: 0.9375rem;
        }

        /* 侧边小卡片 */
        .aside-widget {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 20px;
        }

        .aside-widget .widget-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aside-widget .widget-title i {
            color: var(--primary);
        }

        .aside-widget .widget-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .aside-widget .widget-list li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.875rem;
            color: var(--text-secondary);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .aside-widget .widget-list li:last-child {
            border-bottom: none;
        }

        .aside-widget .widget-list li:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .widget-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .widget-tags .tag-link {
            padding: 4px 12px;
            border: 1px solid var(--border);
            border-radius: 999px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .widget-tags .tag-link:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        /* ============================================================
           客户评价轮播
           ============================================================ */
        .testimonial-section {
            background: var(--surface-2);
            padding: 80px 0;
        }

        .testimonial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            height: 100%;
            transition: var(--transition);
        }

        .testimonial-card:hover {
            border-color: rgba(0, 217, 166, 0.3);
        }

        .testimonial-card .quote-icon {
            color: var(--primary);
            font-size: 28px;
            margin-bottom: 14px;
            opacity: 0.6;
        }

        .testimonial-card .testimonial-text {
            font-size: 0.875rem;
            color: #C9D1D9;
            line-height: 1.7;
            margin-bottom: 20px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .testimonial-card .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-card .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-soft);
            border: 1px solid rgba(0, 217, 166, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 14px;
        }

        .testimonial-card .author-company {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.3;
        }

        .testimonial-card .author-name {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .testimonial-card .author-stars {
            color: var(--warning);
            font-size: 12px;
            margin-top: 2px;
        }

        .carousel-custom .carousel-control-prev,
        .carousel-custom .carousel-control-next {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--border-strong);
            background: var(--surface);
            top: 50%;
            transform: translateY(-50%);
            bottom: auto;
            opacity: 1;
        }

        .carousel-custom .carousel-control-prev {
            left: -20px;
        }

        .carousel-custom .carousel-control-next {
            right: -20px;
        }

        .carousel-custom .carousel-control-prev:hover,
        .carousel-custom .carousel-control-next:hover {
            background: var(--primary);
            border-color: var(--primary);
        }

        .carousel-custom .carousel-control-prev:hover .carousel-control-prev-icon,
        .carousel-custom .carousel-control-next:hover .carousel-control-next-icon {
            filter: invert(1);
        }

        .carousel-custom .carousel-indicators {
            position: static;
            margin-top: 28px;
        }

        .carousel-custom .carousel-indicators [data-bs-target] {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--border-strong);
            border: none;
            transition: var(--transition);
        }

        .carousel-custom .carousel-indicators .active {
            background: var(--primary);
            width: 24px;
            border-radius: 4px;
        }

        /* ============================================================
           服务保障条
           ============================================================ */
        .service-bar {
            padding: 60px 0;
            background: var(--bg);
        }

        .service-bar .service-col {
            text-align: center;
            padding: 16px;
            position: relative;
            transition: var(--transition);
        }

        .service-bar .service-col::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 40px;
            height: 2px;
            background: var(--primary);
            transition: transform 0.3s ease;
        }

        .service-bar .service-col:hover::after {
            transform: translateX(-50%) scaleX(1);
        }

        .service-bar .service-icon {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .service-bar .service-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .service-bar .service-desc {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ============================================================
           CTA区
           ============================================================ */
        .cta-section {
            padding: 60px 0 80px;
            background: var(--bg);
        }

        .cta-panel {
            background: linear-gradient(135deg, rgba(0, 217, 166, 0.15), rgba(13, 17, 23, 0.8));
            border: 1px solid rgba(0, 217, 166, 0.3);
            border-radius: 16px;
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 217, 166, 0.15), transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }

        .cta-panel .cta-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .cta-panel .cta-subtitle {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .cta-panel .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* ============================================================
           页脚
           ============================================================ */
        .site-footer {
            background: #0B0F14;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
        }

        .site-footer .footer-brand {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 12px;
            border-radius: 6px;
        }

        .site-footer .footer-desc {
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .site-footer .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 14px;
        }

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

        .site-footer .footer-links li {
            margin-bottom: 8px;
        }

        .site-footer .footer-links a {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .site-footer .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .site-footer .footer-contact li i {
            color: var(--primary);
            font-size: 14px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            margin-top: 36px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom a {
            color: var(--text-muted);
            margin-left: 16px;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ============================================================
           响应式断点
           ============================================================ */
        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                margin-left: 0;
            }

            .feature-row {
                flex-direction: column !important;
                gap: 28px;
            }

            .feature-row .feature-image,
            .feature-row .feature-content {
                flex: none;
                width: 100%;
            }

            .hero-product {
                display: none;
            }

            .hero-content {
                text-align: center;
            }

            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-actions {
                justify-content: center;
            }

            .hero-tags {
                justify-content: center;
            }
        }

        @media (max-width: 767.98px) {
            .section-padding {
                padding: 48px 0;
            }

            .stats-bar .stat-col {
                padding: 12px 8px;
            }

            .stats-bar .stat-col:not(:last-child)::after {
                display: none;
            }

            .hero-section {
                min-height: auto;
                padding: 60px 0;
            }

            .hero-title {
                font-size: clamp(1.5rem, 5vw, 2rem);
            }

            .feature-row .feature-content h3 {
                font-size: 1.25rem;
            }

            .news-item {
                flex-direction: column;
                gap: 12px;
            }

            .news-item .news-thumb {
                width: 100%;
                height: auto;
                aspect-ratio: 16/9;
            }

            .carousel-custom .carousel-control-prev {
                left: 0;
            }

            .carousel-custom .carousel-control-next {
                right: 0;
            }

            .cta-panel {
                padding: 32px 20px;
            }

            .cta-actions {
                flex-direction: column;
            }
        }

        @media (max-width: 575.98px) {
            .container-wide {
                padding: 0 16px;
            }

            .product-card .product-footer {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

/* roulang page: article */
:root {
            --bg: #0D1117;
            --surface: #161B22;
            --surface-2: #1A2029;
            --border: #21262D;
            --border-strong: #2E353D;
            --primary: #00D9A6;
            --primary-hover: #00C093;
            --primary-soft: rgba(0, 217, 166, 0.08);
            --accent: #FF4A8D;
            --success: #2EE66F;
            --warning: #FFB547;
            --text-main: #E6EDF3;
            --text-secondary: #8B949E;
            --text-muted: #5C6770;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 6px;
            --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 217, 166, 0.25);
            --transition: all .16s ease;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 0.95rem;
            line-height: 1.8;
            background: var(--bg);
            color: var(--text-main);
            font-feature-settings: "tnum";
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--primary-hover);
            text-decoration: none;
        }

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

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

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

        /* ===== 按钮体系 ===== */
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            padding: 0.75rem 1.5rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .btn-primary,
        .btn-primary:focus,
        .btn-primary:active {
            background: var(--primary);
            color: #0D1117;
            border-color: var(--primary);
            font-weight: 700;
            box-shadow: none;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #0D1117;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 217, 166, 0.25);
        }

        .btn-outline-primary,
        .btn-outline-primary:focus,
        .btn-outline-primary:active {
            background: transparent;
            border: 1px solid #30363D;
            color: var(--text-main);
            box-shadow: none;
            font-weight: 600;
        }

        .btn-outline-primary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(0, 217, 166, 0.05);
            transform: translateY(-2px);
        }

        .btn-outline-mobile {
            background: transparent;
            border: 1px solid var(--border-strong);
            color: var(--text-main);
            padding: 0.5rem 0.75rem;
            font-size: 1.25rem;
            border-radius: var(--radius-sm);
            line-height: 1;
        }

        .btn-outline-mobile:hover,
        .btn-outline-mobile:focus {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: none;
        }

        .btn:focus,
        .btn:focus-visible {
            outline: 2px solid rgba(0, 217, 166, 0.5);
            outline-offset: 2px;
            box-shadow: 0 0 0 3px rgba(0, 217, 166, 0.15);
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid rgba(0, 217, 166, 0.5);
            outline-offset: 2px;
        }

        /* ===== 侧边栏（桌面端） ===== */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: 260px;
            height: 100vh;
            background: var(--bg);
            border-right: 1px solid var(--border);
            z-index: 1040;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 72px;
            padding: 0 24px;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--primary-soft);
            border: 1px solid rgba(0, 217, 166, 0.4);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            letter-spacing: 0.02em;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text strong {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.01em;
        }

        .brand-text small {
            font-size: 0.6875rem;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            padding: 16px 0;
            flex: 1;
        }

        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 24px;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            font-weight: 500;
            border-left: 2px solid transparent;
            transition: var(--transition);
        }

        .sidebar-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.03);
            border-left-color: var(--primary);
        }

        .sidebar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-soft);
            border-left-color: var(--primary);
        }

        .sidebar-nav .nav-link.active i {
            color: var(--primary);
        }

        .sidebar-nav .nav-link i {
            font-size: 1.125rem;
            line-height: 1;
            width: 20px;
            text-align: center;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .sidebar-nav .nav-link:hover i {
            color: var(--text-main);
        }

        .sidebar-nav .nav-link.active i {
            color: var(--primary);
        }

        .sidebar-footer {
            padding: 20px 24px;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.7;
            flex-shrink: 0;
        }

        .sidebar-footer p {
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-footer i {
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            height: 64px;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }

        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-main);
            font-weight: 600;
        }

        .mobile-brand:hover {
            color: var(--primary);
        }

        /* ===== Offcanvas 移动导航 ===== */
        .offcanvas {
            background: var(--surface);
            color: var(--text-main);
        }

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

        .offcanvas-title {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            font-size: 1rem;
        }

        .btn-close-white {
            filter: invert(1);
            opacity: 0.6;
            transition: var(--transition);
        }

        .btn-close-white:hover {
            opacity: 1;
            transform: rotate(90deg);
        }

        .offcanvas-body {
            padding: 0;
        }

        .mobile-nav {
            display: flex;
            flex-direction: column;
            padding: 12px 0;
        }

        .mobile-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 24px;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            font-weight: 500;
            border-left: 2px solid transparent;
            transition: var(--transition);
        }

        .mobile-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.03);
            border-left-color: var(--primary);
        }

        .mobile-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-soft);
            border-left-color: var(--primary);
        }

        .mobile-nav .nav-link i {
            font-size: 1.125rem;
            width: 20px;
            text-align: center;
            color: var(--text-muted);
        }

        .mobile-nav .nav-link.active i {
            color: var(--primary);
        }

        .offcanvas-backdrop.show {
            opacity: 0.6;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--bg);
            background-image: linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
            background-size: 32px 32px;
        }

        .container-article {
            max-width: 880px;
            margin: 0 auto;
            padding: 40px 24px 64px;
            flex: 1;
            width: 100%;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            margin-bottom: 32px;
        }

        .breadcrumb {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin: 0;
            padding: 0;
            background: transparent;
            border-radius: 0;
        }

        .breadcrumb-item {
            color: var(--text-secondary);
        }

        .breadcrumb-item + .breadcrumb-item::before {
            content: "›";
            color: var(--text-muted);
            padding: 0 6px;
        }

        .breadcrumb-item a {
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .breadcrumb-item a:hover {
            color: var(--primary);
        }

        .breadcrumb-item.active {
            color: var(--text-main);
        }

        /* ===== 文章标题区 ===== */
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }

        .article-title {
            font-size: clamp(1.5rem, 3vw, 2.25rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 0.8125rem;
            color: var(--text-secondary);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            font-size: 0.9375rem;
        }

        .category-badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            color: var(--primary);
            background: transparent;
            border: 1px solid rgba(0, 217, 166, 0.4);
            line-height: 1.5;
        }

        /* ===== 文章正文区 ===== */
        .article-content {
            max-width: 760px;
            margin: 0 auto 40px;
            font-size: 0.95rem;
            line-height: 1.85;
            color: #C9D1D9;
        }

        .article-content p {
            margin-bottom: 1.75em;
        }

        .article-content h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-main);
            border-left: 4px solid var(--primary);
            padding-left: 12px;
            margin-top: 2em;
            margin-bottom: 1em;
        }

        .article-content h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-main);
            margin-top: 1.5em;
            margin-bottom: 0.75em;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.2em;
            margin-bottom: 1.5em;
        }

        .article-content li {
            margin-bottom: 0.5em;
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-md);
            margin: 1.5em 0;
            box-shadow: var(--shadow);
        }

        .article-content figcaption {
            font-size: 0.8125rem;
            color: var(--text-muted);
            text-align: center;
            margin-top: -1em;
            margin-bottom: 1.5em;
        }

        .article-content blockquote {
            background: var(--surface-2);
            border-left: 4px solid var(--primary);
            padding: 20px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            position: relative;
        }

        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-content table {
            width: 100%;
            margin: 1.5em 0;
            border-collapse: collapse;
            font-size: 0.875rem;
            color: var(--text-main);
        }

        .article-content table thead th {
            background: var(--surface-2);
            color: var(--text-main);
            font-weight: 600;
            padding: 10px 14px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-content table tbody td {
            padding: 8px 14px;
            border: 1px solid var(--border);
            color: var(--text-secondary);
        }

        .article-content table tbody tr:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }

        .article-content pre {
            background: #0B0F14;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 20px;
            overflow-x: auto;
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 0.875rem;
            line-height: 1.6;
            color: var(--text-main);
            margin: 1.5em 0;
        }

        .article-content code {
            background: #0B0F14;
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 2px 6px;
            font-family: "SFMono-Regular", Consolas, monospace;
            font-size: 0.85em;
            color: var(--primary);
        }

        .article-content pre code {
            background: transparent;
            border: none;
            padding: 0;
            color: inherit;
            font-size: inherit;
        }

        /* ===== 标签区 ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            margin-bottom: 40px;
        }

        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-strong);
            transition: var(--transition);
        }

        .article-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .article-tags .tag i {
            font-size: 0.75rem;
        }

        .article-footer-actions {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 48px;
        }

        .btn-back {
            background: transparent;
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            padding: 8px 20px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-back:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            margin-top: 40px;
        }

        .related-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-title::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 20px;
            background: var(--primary);
            border-radius: 2px;
        }

        .related-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 217, 166, 0.6);
            box-shadow: var(--shadow-hover);
        }

        .related-card img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }

        .related-card .card-body {
            padding: 16px 20px 20px;
        }

        .related-card h3 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card h3 a {
            color: var(--text-main);
            transition: var(--transition);
        }

        .related-card h3 a:hover {
            color: var(--primary);
        }

        .related-card .card-meta {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== 内容未找到 ===== */
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--surface);
            border: 1px dashed var(--border-strong);
            border-radius: var(--radius-lg);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            font-size: 0.9375rem;
            margin-bottom: 24px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0B0F14;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
            margin-left: 0;
            width: 100%;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
        }

        .footer-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }

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

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

        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.875rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.875rem;
        }

        .footer-contact i {
            color: var(--primary);
            font-size: 0.9375rem;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            margin-top: 32px;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
            margin-left: 16px;
            transition: var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }

            .main-content {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
            }

            .container-article {
                padding: 24px 20px 48px;
            }

            .site-footer {
                margin-left: 0;
            }
        }

        @media (max-width: 767.98px) {
            .container-wide {
                padding: 0 20px;
            }

            .article-meta {
                gap: 10px 16px;
            }

            .related-card {
                margin-bottom: 0;
            }

            .article-footer-actions {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .container-article {
                padding: 20px 16px 40px;
            }

            .article-title {
                font-size: 1.375rem;
            }

            .article-content {
                font-size: 0.9375rem;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .footer-bottom a {
                margin-left: 8px;
                margin-right: 8px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                animation: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #0D1117;
            --surface: #161B22;
            --surface-2: #1A2029;
            --border: #21262D;
            --border-strong: #2E353D;
            --primary: #00D9A6;
            --primary-hover: #00C093;
            --primary-soft: rgba(0, 217, 166, 0.08);
            --accent: #FF4A8D;
            --success: #2EE66F;
            --warning: #FFB547;
            --text-main: #E6EDF3;
            --text-secondary: #8B949E;
            --text-muted: #5C6770;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 6px;
            --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 217, 166, 0.25);
            --transition: all 0.16s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 0.95rem;
            font-feature-settings: "tnum";
            overflow-x: hidden;
        }

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

        a:hover {
            color: var(--primary);
        }

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

        button,
        input {
            font-family: inherit;
        }

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

        /* ===== Sidebar ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: var(--bg);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            padding: 0 16px;
            z-index: 1040;
        }

        .sidebar-brand {
            height: 72px;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid var(--border);
            padding: 0 8px;
            margin-bottom: 20px;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--primary-soft);
            border: 1px solid rgba(0, 217, 166, 0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--primary);
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.3;
        }

        .brand-text strong {
            font-size: 0.95rem;
            color: var(--text-main);
            font-weight: 700;
            letter-spacing: 0.01em;
        }

        .brand-text small {
            font-size: 0.7rem;
            color: var(--text-muted);
            letter-spacing: 0.14em;
            text-transform: uppercase;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }

        .sidebar-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 8px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            background: transparent;
            border-left: 2px solid transparent;
            transition: var(--transition);
            font-weight: 500;
            text-decoration: none;
            width: 100%;
        }

        .sidebar-nav .nav-link i {
            font-size: 1.1rem;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .sidebar-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.03);
            border-left-color: var(--primary);
        }

        .sidebar-nav .nav-link:hover i {
            color: var(--primary);
        }

        .sidebar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-soft);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .sidebar-nav .nav-link.active i {
            color: var(--primary);
        }

        .sidebar-bottom {
            padding: 16px 12px;
            border-top: 1px solid var(--border);
            font-size: 0.8125rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .sidebar-bottom i {
            margin-right: 6px;
            color: var(--text-muted);
        }

        .sidebar-bottom .beian {
            margin-top: 8px;
            opacity: 0.7;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--bg);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            z-index: 1050;
        }

        .mobile-header .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .mobile-header .mobile-brand strong {
            font-size: 0.95rem;
            color: var(--text-main);
        }

        .mobile-header .mobile-brand small {
            font-size: 0.7rem;
            color: var(--text-muted);
            letter-spacing: 0.12em;
            display: block;
            line-height: 1;
        }

        .mobile-menu-btn {
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            background: var(--surface);
            border-radius: 8px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: var(--transition);
        }

        .mobile-menu-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .mobile-menu .offcanvas-header {
            border-bottom: 1px solid var(--border);
            padding: 20px;
        }

        .mobile-menu .sidebar-nav {
            padding: 20px;
        }

        .mobile-menu .sidebar-bottom {
            padding: 20px;
        }

        .offcanvas-backdrop.show {
            opacity: 0.6;
            background: #000;
        }

        .offcanvas {
            background: var(--surface);
        }

        /* ===== Main Wrapper ===== */
        .main-wrapper {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .page-content {
            flex: 1;
        }

        @media (max-width: 991.98px) {
            .sidebar {
                display: none;
            }

            .mobile-header {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 64px;
            }
        }

        /* ===== Category Hero ===== */
        .category-hero {
            background: linear-gradient(90deg, rgba(13, 17, 23, 0.85) 30%, rgba(13, 17, 23, 0.6)), url('/assets/images/backpic/back-1.png') center/cover;
            padding: 64px 24px 48px;
            border-bottom: 1px solid var(--border);
            background-size: cover;
            background-position: center;
        }

        .category-hero-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .breadcrumb-nav {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 4px;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-nav .sep {
            margin: 0 4px;
            color: var(--text-muted);
        }

        .breadcrumb-nav .current {
            color: var(--text-main);
        }

        .category-hero h1 {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .category-hero p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
        }

        /* ===== Stats ===== */
        .stats-strip {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 32px 0;
        }

        .stats-strip .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .stats-strip .stat-item {
            text-align: center;
            position: relative;
            padding: 8px 0;
        }

        .stats-strip .stat-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: 0;
            top: 20%;
            height: 60%;
            width: 1px;
            background: var(--border);
        }

        .stats-strip .stat-num {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.4;
        }

        .stats-strip .stat-label {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        @media (max-width: 767.98px) {
            .stats-strip .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px 0;
            }

            .stats-strip .stat-item:nth-child(2)::after {
                display: none;
            }
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 80px 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-main);
            border-left: 4px solid var(--primary);
            padding-left: 16px;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .section-header .section-sub {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-top: 12px;
            margin-left: 20px;
            line-height: 1.6;
        }

        @media (max-width: 767.98px) {
            .section-block {
                padding: 48px 16px;
            }
        }

        /* ===== Product Grid ===== */
        .product-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }

        .product-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 217, 166, 0.6);
            box-shadow: var(--shadow-hover);
        }

        .product-card .product-img {
            aspect-ratio: 4/3;
            background: var(--bg);
            overflow: hidden;
            position: relative;
        }

        .product-card .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .product-card:hover .product-img img {
            transform: scale(1.03);
        }

        .product-card .product-status {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(13, 17, 23, 0.75);
            backdrop-filter: blur(4px);
            border: 1px solid transparent;
            color: var(--text-main);
        }

        .product-card .product-status.in-stock {
            color: var(--primary);
            border-color: rgba(0, 217, 166, 0.5);
        }

        .product-card .product-status.hot {
            color: var(--accent);
            border-color: rgba(255, 74, 141, 0.5);
        }

        .product-card .product-status.custom {
            color: var(--warning);
            border-color: rgba(255, 181, 71, 0.5);
        }

        .product-card .product-body {
            padding: 20px;
        }

        .product-card .product-cat {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 4px;
        }

        .product-card .product-name {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
            line-height: 1.5;
        }

        .product-card .product-spec {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .product-card .product-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }

        .product-card .product-price {
            font-size: 0.9375rem;
            font-weight: 700;
            color: var(--primary);
        }

        .product-card .product-price del {
            font-size: 0.8125rem;
            color: var(--text-muted);
            font-weight: 400;
            margin-left: 6px;
        }

        .btn-outline-sm {
            font-size: 0.8125rem;
            padding: 6px 14px;
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--text-secondary);
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-outline-sm:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }

        .product-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        @media (max-width: 1199.98px) {
            .product-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 767.98px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 575.98px) {
            .product-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 80px 24px;
        }

        .process-item {
            text-align: left;
            position: relative;
            padding: 20px;
            background: var(--surface-2);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .process-item:hover {
            border-color: rgba(0, 217, 166, 0.4);
            transform: translateY(-2px);
        }

        .process-step {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.1em;
            margin-bottom: 8px;
        }

        .process-item h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .process-item p {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media (max-width: 991.98px) {
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                padding: 48px 24px;
            }
        }

        @media (max-width: 575.98px) {
            .process-grid {
                grid-template-columns: 1fr;
                padding: 48px 16px;
            }
        }

        /* ===== Scenarios ===== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .scenario-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
            height: 100%;
        }

        .scenario-card:hover {
            border-color: rgba(0, 217, 166, 0.4);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .scenario-card i {
            font-size: 1.75rem;
            color: var(--primary);
            margin-bottom: 14px;
            display: inline-block;
        }

        .scenario-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .scenario-card p {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .scenario-card .scenario-tag {
            display: inline-block;
            margin-top: 12px;
            font-size: 0.75rem;
            color: var(--primary);
            background: var(--primary-soft);
            padding: 2px 10px;
            border-radius: 999px;
            font-weight: 500;
        }

        @media (max-width: 991.98px) {
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 575.98px) {
            .scenario-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ Accordion ===== */
        .faq-section {
            background: var(--surface-2);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .faq-wrap {
            max-width: 900px;
            margin: 0 auto;
            padding: 80px 24px;
        }

        .accordion-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid var(--border);
        }

        .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 1rem;
            font-weight: 600;
            padding: 20px 8px;
            box-shadow: none;
            outline: none;
            transition: var(--transition);
            border: none;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .accordion-button::after {
            display: none;
        }

        .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border: none;
        }

        .accordion-button:hover {
            color: var(--primary);
        }

        .accordion-button .faq-icon {
            width: 28px;
            height: 28px;
            border: 1px solid var(--border-strong);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform 0.3s ease, border-color 0.3s ease;
        }

        .accordion-button:not(.collapsed) .faq-icon {
            transform: rotate(45deg);
            border-color: var(--primary);
        }

        .accordion-body {
            padding: 0 8px 24px 40px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .cta-panel {
            background: linear-gradient(135deg, rgba(0, 217, 166, 0.12), rgba(13, 17, 23, 0.85)), url('/assets/images/backpic/back-2.webp') center/cover;
            border: 1px solid rgba(0, 217, 166, 0.25);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            background: rgba(0, 217, 166, 0.12);
            border-radius: 50%;
            filter: blur(60px);
            pointer-events: none;
        }

        .cta-panel h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            position: relative;
        }

        .cta-panel p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
        }

        .cta-panel .btn-group-wrap {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
        }

        .btn-primary-custom {
            background: var(--primary);
            color: var(--bg);
            font-weight: 700;
            padding: 0.875rem 1.75rem;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            font-size: 0.9375rem;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary-custom:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 217, 166, 0.25);
            color: var(--bg);
        }

        .btn-outline-custom {
            background: transparent;
            color: var(--text-main);
            border: 1px solid var(--border-strong);
            padding: 0.875rem 1.75rem;
            border-radius: var(--radius-sm);
            font-weight: 500;
            cursor: pointer;
            font-size: 0.9375rem;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        @media (max-width: 767.98px) {
            .cta-panel {
                padding: 48px 24px;
            }

            .cta-panel h2 {
                font-size: 1.25rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0B0F14;
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .site-footer .footer-brand .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--primary-soft);
            border: 1px solid rgba(0, 217, 166, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 0.85rem;
        }

        .site-footer .footer-brand span {
            font-weight: 700;
            color: var(--text-main);
            font-size: 1rem;
        }

        .site-footer .footer-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 360px;
            margin-bottom: 0;
        }

        .site-footer .footer-title {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            line-height: 1.4;
        }

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

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

        .site-footer .footer-links a {
            font-size: 0.875rem;
            color: var(--text-secondary);
            transition: var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .site-footer .footer-contact li {
            font-size: 0.875rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .site-footer .footer-contact i {
            color: var(--primary);
            line-height: 1.6;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .site-footer .footer-bottom span {
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom a {
            margin-left: 16px;
            font-size: 0.8125rem;
            color: var(--text-muted);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--primary);
        }

        @media (max-width: 575.98px) {
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .site-footer .footer-bottom a:first-child {
                margin-left: 0;
            }
        }

        /* ===== Focus ===== */
        a:focus-visible,
        button:focus-visible,
        .btn-primary-custom:focus-visible,
        .btn-outline-custom:focus-visible,
        .btn-outline-sm:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(0, 217, 166, 0.15);
        }

        @media (max-width: 575.98px) {
            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
  --bg: #0D1117;
  --surface: #161B22;
  --surface-2: #1A2029;
  --border: #21262D;
  --border-strong: #2E353D;
  --primary: #00D9A6;
  --primary-hover: #00C093;
  --primary-soft: rgba(0, 217, 166, 0.08);
  --accent: #FF4A8D;
  --success: #2EE66F;
  --warning: #FFB547;
  --text-main: #E6EDF3;
  --text-secondary: #8B949E;
  --text-muted: #5C6770;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 6px;
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(0, 217, 166, 0.25);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  font-size: 0.95rem;
  line-height: 1.8;
  font-feature-settings: "tnum";
  min-height: 100vh;
}

a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color .16s ease;
}
a:hover {
  color: var(--primary);
}

img {
  max-width: 100%;
}

ul, ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

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

.container-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.section-header {
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-main);
  position: relative;
  padding-left: 14px;
  margin-bottom: 12px;
}
.section-header h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  border-radius: 999px;
  background: var(--primary);
}
.section-header p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  padding: 0.875rem 1.75rem;
  font-weight: 700;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  transition: all .16s ease;
  cursor: pointer;
  line-height: 1.4;
}
.btn:focus,
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 217, 166, 0.25);
}
.btn-primary {
  background: var(--primary);
  color: var(--bg);
  border-color: var(--primary);
}
.btn-primary:hover,
.btn-primary:active {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 217, 166, 0.25);
}
.btn-outline {
  background: transparent;
  border-color: #30363D;
  color: var(--text-main);
}
.btn-outline:hover,
.btn-outline:active {
  background: rgba(0, 217, 166, 0.05);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: 260px;
  height: 100vh;
  background: var(--bg);
  border-right: 1px solid var(--border);
  flex-direction: column;
  padding: 0 16px;
  z-index: 1040;
}
.sidebar-brand {
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-bottom: 1px solid var(--border);
}
.brand-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(0, 217, 166, 0.2), rgba(0, 217, 166, 0.05));
  border: 1px solid rgba(0, 217, 166, 0.4);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.02em;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.brand-name {
  color: var(--text-main);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.brand-sub {
  color: var(--primary);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sidebar-nav {
  flex: 1;
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  position: relative;
  transition: all .16s ease;
  border: none;
  background: transparent;
}
.sidebar-nav .nav-link i {
  font-size: 1.125rem;
  width: 20px;
  text-align: center;
  color: inherit;
  transition: color .16s ease;
}
.sidebar-nav .nav-link:hover {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-main);
}
.sidebar-nav .nav-link:hover::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.sidebar-nav .nav-link.active {
  background: var(--primary-soft);
  color: var(--primary);
}
.sidebar-nav .nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: var(--primary);
}

.sidebar-contact {
  padding: 20px 8px 24px;
  border-top: 1px solid var(--border);
}
.sidebar-contact p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-contact p:last-child {
  margin-bottom: 0;
}
.sidebar-contact i {
  color: var(--primary);
  font-size: 0.875rem;
}

/* ===== Mobile topbar / offcanvas ===== */
.mobile-topbar {
  position: sticky;
  top: 0;
  z-index: 1040;
  height: 64px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.mobile-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.mobile-brand .brand-icon {
  width: 34px;
  height: 34px;
  font-size: 0.75rem;
}
.mobile-brand .brand-name {
  font-size: 0.9375rem;
  color: var(--text-main);
  font-weight: 700;
}
.mobile-menu-btn {
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 1.4rem;
  transition: all .16s ease;
}
.mobile-menu-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-offcanvas {
  background: var(--surface) !important;
  max-width: 320px;
  width: 280px;
  border-left: 1px solid var(--border);
}
.mobile-offcanvas .offcanvas-header {
  border-bottom: 1px solid var(--border);
  padding: 20px;
}
.mobile-offcanvas .offcanvas-title {
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.9375rem;
}
.mobile-offcanvas .btn-close {
  background: transparent;
  opacity: 1;
  color: var(--text-main);
  font-size: 1.25rem;
}
.mobile-offcanvas .btn-close:hover {
  color: var(--primary);
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  padding: 16px 0;
}
.mobile-nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
  padding: 0 20px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  font-weight: 500;
  border-left: 2px solid transparent;
  transition: all .16s ease;
}
.mobile-nav-link i {
  width: 20px;
  text-align: center;
  font-size: 1.125rem;
}
.mobile-nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.03);
}
.mobile-nav-link.active {
  color: var(--primary);
  background: var(--primary-soft);
  border-left-color: var(--primary);
}
.mobile-contact {
  border-top: 1px solid var(--border);
  padding: 20px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.mobile-contact p {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.mobile-contact p:last-child {
  margin-bottom: 0;
}
.mobile-contact i {
  color: var(--primary);
}

/* ===== Main ===== */
.main-wrapper {
  margin-left: 260px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Page Hero ===== */
.page-hero {
  min-height: 260px;
  background:
    linear-gradient(90deg, rgba(13, 17, 23, 0.92) 20%, rgba(13, 17, 23, 0.72)),
    url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  display: flex;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--border);
}
.page-hero .breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.page-hero .breadcrumb-nav a {
  color: var(--text-muted);
}
.page-hero .breadcrumb-nav a:hover {
  color: var(--primary);
}
.page-hero .breadcrumb-nav .sep {
  color: var(--text-muted);
  opacity: 0.6;
}
.page-hero .breadcrumb-nav .current {
  color: var(--text-main);
}
.page-hero h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.page-hero .page-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 0;
}

/* ===== Solution section ===== */
.solution-section {
  padding: 80px 0;
}
.solution-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 40px;
  margin-bottom: 32px;
  transition: all .16s ease;
}
.solution-card:last-child {
  margin-bottom: 0;
}
.solution-card:hover {
  border-color: rgba(0, 217, 166, 0.4);
  box-shadow: var(--shadow-hover);
}
.solution-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}
.solution-img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  transition: transform .4s ease;
}
.solution-card:hover .solution-img img {
  transform: scale(1.02);
}
.solution-img::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 40px rgba(0, 217, 166, 0.08);
  pointer-events: none;
}
.solution-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(0, 217, 166, 0.4);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 16px;
}
.solution-card h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.solution-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}
.solution-params {
  display: flex;
  flex-wrap: wrap;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 24px;
}
.param-item {
  width: 50%;
  padding: 12px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
}
.param-item:nth-child(odd) {
  border-right: 1px solid var(--border);
}
.param-item:nth-last-child(-n+2) {
  border-bottom: none;
}
.param-item dt {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.param-item dd {
  font-size: 0.875rem;
  color: var(--text-main);
  margin: 4px 0 0;
  line-height: 1.6;
}

/* ===== Strength ===== */
.strength-section {
  padding: 64px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.strength-item {
  text-align: center;
  padding: 24px 20px;
  border-left: 1px solid var(--border);
}
.strength-item:first-child {
  border-left: none;
}
.strength-num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 6px;
}
.strength-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ===== Scenario ===== */
.scenario-section {
  padding: 80px 0;
}
.scenario-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  height: 100%;
  transition: all .16s ease;
}
.scenario-card:hover {
  border-color: rgba(0, 217, 166, 0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.scenario-card i {
  font-size: 1.875rem;
  color: var(--primary);
  display: block;
  margin-bottom: 16px;
}
.scenario-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.scenario-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-section .accordion {
  max-width: 860px;
}
.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
}
.accordion-item:first-child {
  border-top: 1px solid var(--border);
}
.accordion-button {
  background: transparent;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 600;
  padding: 1.25rem 0;
  box-shadow: none;
  transition: color .16s ease;
}
.accordion-button:hover,
.accordion-button:focus {
  background: transparent;
  box-shadow: none;
  color: var(--primary);
}
.accordion-button:not(.collapsed) {
  background: transparent;
  color: var(--primary);
  box-shadow: none;
}
.accordion-button::after {
  content: "+";
  background-image: none;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--text-secondary);
  transition: transform .2s ease, color .2s ease;
}
.accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
  color: var(--primary);
}
.accordion-body {
  padding: 0 0 1.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
}
.cta-panel {
  background:
    radial-gradient(circle at 85% 20%, rgba(0, 217, 166, 0.18), transparent 320px),
    linear-gradient(135deg, rgba(0, 217, 166, 0.15), rgba(13, 17, 23, 0.8));
  border: 1px solid rgba(0, 217, 166, 0.3);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.cta-panel h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  position: relative;
}
.cta-panel p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
}
.cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  position: relative;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: #0B0F14;
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  margin-top: auto;
}
.site-footer .footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.site-footer .footer-brand .brand-icon {
  width: 36px;
  height: 36px;
  font-size: 0.75rem;
}
.site-footer .footer-brand span {
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.9375rem;
}
.footer-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 0;
  max-width: 300px;
}
.footer-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 20px;
}
.footer-links {
  padding: 0;
  margin: 0;
}
.footer-links li {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color .16s ease;
}
.footer-links a:hover {
  color: var(--primary);
}
.footer-contact li {
  color: var(--text-secondary);
  font-size: 0.875rem;
}
.footer-contact li i {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 40px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom span {
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.footer-bottom a {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-left: 16px;
}
.footer-bottom a:hover {
  color: var(--primary);
}

/* ===== Responsive ===== */
@media (max-width: 1199.98px) {
  .strength-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .strength-item {
    border-left: none;
    border-bottom: 1px solid var(--border);
  }
  .strength-item:nth-child(odd) {
    border-right: 1px solid var(--border);
  }
  .strength-item:nth-last-child(-n+2) {
    border-bottom: none;
  }
}

@media (max-width: 991.98px) {
  .main-wrapper {
    margin-left: 0;
  }
  .sidebar {
    display: none !important;
  }
  .mobile-topbar {
    display: flex;
  }
  .solution-section,
  .scenario-section,
  .faq-section,
  .cta-section {
    padding: 48px 0;
  }
  .section-header {
    margin-bottom: 32px;
  }
  .container-wide {
    padding: 0 20px;
  }
  .solution-card {
    padding: 24px;
  }
  .strength-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .strength-item {
    padding: 20px 12px;
  }
  .cta-panel {
    padding: 40px 24px;
  }
}

@media (max-width: 767.98px) {
  .page-hero {
    padding: 40px 0;
    min-height: auto;
  }
  .page-hero h1 {
    font-size: 1.5rem;
  }
  .param-item {
    width: 100%;
  }
  .param-item:nth-child(odd) {
    border-right: none;
  }
  .param-item:nth-last-child(-n+2) {
    border-bottom: 1px solid var(--border);
  }
  .param-item:last-child {
    border-bottom: none;
  }
  .solution-params .param-item:nth-last-child(-n+2) {
    border-bottom: 1px solid var(--border);
  }
  .solution-params .param-item:last-child {
    border-bottom: none;
  }
  .cta-btns {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-btns .btn {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 575.98px) {
  .strength-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .strength-item {
    padding: 16px 8px;
  }
  .strength-num {
    font-size: 1.375rem;
  }
  .scenario-section .row {
    --bs-gutter-x: 16px;
    --bs-gutter-y: 16px;
  }
  .scenario-card {
    padding: 20px 16px;
  }
}

@media (min-width: 992px) {
  .mobile-topbar {
    display: none;
  }
  .mobile-offcanvas {
    display: none !important;
  }
}