/* roulang page: index */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0B1220;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-light: rgba(255, 255, 255, 0.10);
            --glass-border: rgba(255, 255, 255, 0.12);
            --primary-blue: #00A6FF;
            --accent-cyan: #00E0FF;
            --energy-green: #2BFF88;
            --text-primary: #EAF6FF;
            --text-secondary: rgba(234, 246, 255, 0.72);
            --text-muted: rgba(234, 246, 255, 0.48);
            --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.45);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Inter', 'Roboto', 'SF Mono', 'Courier New', monospace;
            --transition-base: all 0.25s ease;
            --container-max: 1280px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

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

        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }

        .section-label {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 48px;
            line-height: 1.8;
        }

        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }

        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 0 24px rgba(0, 166, 255, 0.5);
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }

        .btn-glow:hover {
            box-shadow: 0 0 36px rgba(0, 224, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.4);
        }

        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 16px;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }

        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
            transform: translateY(-2px);
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.25);
        }

        .tag-green {
            background: rgba(43, 255, 136, 0.12);
            color: var(--energy-green);
            border-color: rgba(43, 255, 136, 0.25);
        }

        /* Navigation - Floating Dock */
        .site-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1050;
            width: calc(100% - 48px);
            max-width: 1180px;
        }

        .nav-dock {
            background: rgba(10, 14, 26, 0.75);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
            transition: var(--transition-base);
        }

        .nav-dock .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-dock .logo i {
            color: var(--accent-cyan);
            font-size: 20px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-links a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 30px;
            transition: var(--transition-base);
            display: block;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.08);
        }

        .nav-links a.active {
            color: #fff;
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            box-shadow: 0 0 18px rgba(0, 166, 255, 0.4);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search-btn {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .nav-search-btn:hover {
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-primary);
        }

        .nav-cta {
            font-size: 14px;
            padding: 10px 22px;
        }

        .navbar-toggler-custom {
            display: none;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 50%;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition-base);
        }

        .navbar-toggler-custom:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 300px;
            max-width: 85vw;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(28px);
            -webkit-backdrop-filter: blur(28px);
            border-left: 1px solid rgba(255, 255, 255, 0.1);
            z-index: 1060;
            padding: 28px 24px;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            overflow-y: auto;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .mobile-drawer .drawer-close {
            position: absolute;
            top: 16px;
            right: 16px;
            background: rgba(255, 255, 255, 0.06);
            border: none;
            color: var(--text-primary);
            width: 38px;
            height: 38px;
            border-radius: 50%;
            font-size: 18px;
            cursor: pointer;
        }

        .mobile-drawer .drawer-links {
            list-style: none;
            padding: 0;
            margin: 48px 0 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-drawer .drawer-links a {
            color: var(--text-primary);
            font-size: 17px;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: 12px;
            transition: var(--transition-base);
            display: block;
        }

        .mobile-drawer .drawer-links a:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .mobile-drawer .drawer-links a.active {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 1055;
        }

        .drawer-overlay.show {
            display: block;
        }

        /* Hero */
        .hero-section {
            padding: 160px 0 80px;
            min-height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.3) 0%, var(--bg-primary) 100%);
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/53cbcd4d6a7537d2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
        }

        .hero-stage {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 32px;
        }

        .hero-badge {
            display: inline-block;
            padding: 8px 22px;
            border-radius: 40px;
            background: rgba(0, 166, 255, 0.12);
            border: 1px solid rgba(0, 166, 255, 0.3);
            font-size: 14px;
            color: var(--accent-cyan);
            font-weight: 500;
        }

        .hero-title {
            font-size: 58px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1.5px;
            background: linear-gradient(135deg, #EAF6FF 30%, #00A6FF 70%, #00E0FF 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            max-width: 900px;
        }

        .hero-subtitle {
            font-size: 20px;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.85;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .hero-data-row {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 12px;
        }

        .hero-data-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 16px;
            padding: 14px 24px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            text-align: center;
            min-width: 130px;
        }

        .hero-data-item .value {
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
        }

        .hero-data-item .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* KPI Board */
        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .kpi-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            text-align: center;
            transition: var(--transition-base);
        }

        .kpi-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 20px 50px rgba(0, 166, 255, 0.12);
        }

        .kpi-card .kpi-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 166, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 24px;
            color: var(--accent-cyan);
        }

        .kpi-card .kpi-value {
            font-size: 38px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--text-primary);
            line-height: 1.2;
        }

        .kpi-card .kpi-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* Feature Grid */
        .feature-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr;
            gap: 24px;
        }

        .feature-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 60px rgba(0, 166, 255, 0.15);
        }

        .feature-card .feature-icon {
            font-size: 28px;
            color: var(--accent-cyan);
            margin-bottom: 18px;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }

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

        .feature-card.feature-large {
            grid-row: span 2;
            background: linear-gradient(160deg, rgba(0, 166, 255, 0.08), rgba(0, 224, 255, 0.04));
        }

        .feature-card.feature-large h3 {
            font-size: 26px;
        }

        /* Deep Content */
        .deep-content-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .deep-content-text h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.35;
        }

        .deep-content-text h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--accent-cyan);
        }

        .deep-content-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }

        .deep-content-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-glass);
        }

        .deep-content-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

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

        .scenario-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: var(--transition-base);
        }

        .scenario-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
        }

        .scenario-card .scenario-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 16px;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
        }

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

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

        /* Demo Gallery */
        .demo-gallery {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }

        .demo-main {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-glass);
        }

        .demo-main img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .demo-side {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .demo-side-item {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--glass-border);
            box-shadow: var(--shadow-glass);
            flex: 1;
        }

        .demo-side-item img {
            width: 100%;
            height: 190px;
            object-fit: cover;
        }

        .demo-caption {
            padding: 16px 20px;
            background: rgba(10, 14, 26, 0.6);
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* Case Studies */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: var(--transition-base);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .case-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 20px 50px rgba(0, 166, 255, 0.1);
        }

        .case-card .case-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: rgba(0, 166, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .case-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .case-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 8px;
        }

        .case-card .case-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-cyan);
        }

        /* Pricing */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }

        .pricing-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            text-align: center;
            transition: var(--transition-base);
            position: relative;
        }

        .pricing-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
        }

        .pricing-card.featured {
            background: linear-gradient(170deg, rgba(0, 166, 255, 0.12), rgba(0, 224, 255, 0.06));
            border-color: rgba(0, 166, 255, 0.5);
            box-shadow: 0 0 50px rgba(0, 166, 255, 0.22);
            transform: scale(1.03);
        }

        .pricing-card.featured:hover {
            transform: scale(1.03) translateY(-4px);
        }

        .pricing-card .pricing-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 18px;
            border-radius: 20px;
            box-shadow: 0 0 20px rgba(0, 166, 255, 0.5);
        }

        .pricing-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .pricing-price {
            font-size: 46px;
            font-weight: 800;
            font-family: var(--font-mono);
            margin-bottom: 8px;
        }

        .pricing-price span {
            font-size: 16px;
            font-weight: 400;
            color: var(--text-secondary);
        }

        .pricing-features {
            list-style: none;
            padding: 0;
            margin: 20px 0 28px;
            text-align: left;
        }

        .pricing-features li {
            font-size: 15px;
            color: var(--text-secondary);
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .pricing-features li i {
            color: var(--energy-green);
            font-size: 14px;
        }

        /* Reviews Wall */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .review-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: var(--transition-base);
        }

        .review-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.35);
        }

        .review-card .review-stars {
            color: #FFD700;
            font-size: 16px;
            margin-bottom: 14px;
            letter-spacing: 3px;
        }

        .review-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .review-card .reviewer {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
        }

        /* User Voice / Long Reviews */
        .voice-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .voice-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: var(--transition-base);
        }

        .voice-item:hover {
            border-color: rgba(0, 166, 255, 0.35);
        }

        .voice-item .voice-meta {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .voice-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* News Center */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: var(--transition-base);
        }

        .news-item:hover {
            border-color: rgba(0, 166, 255, 0.35);
            transform: translateX(4px);
        }

        .news-item .news-date {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
            padding-top: 4px;
            font-family: var(--font-mono);
        }

        .news-item .news-body h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .news-item .news-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .news-item .news-body .btn-link-news {
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-cyan);
            padding: 0;
            border: none;
            background: none;
            cursor: pointer;
        }

        /* Brand Intro */
        .brand-intro {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .brand-intro h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .brand-intro p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: var(--transition-base);
            overflow: hidden;
        }

        .faq-item:hover {
            border-color: rgba(0, 166, 255, 0.35);
        }

        .faq-question {
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            color: var(--text-primary);
            user-select: none;
        }

        .faq-question .faq-toggle-icon {
            font-size: 16px;
            color: var(--accent-cyan);
            flex-shrink: 0;
            transition: transform 0.25s ease;
        }

        .faq-item.open .faq-toggle-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 500px;
        }

        /* CTA Section */
        .cta-panel {
            background: linear-gradient(160deg, rgba(0, 166, 255, 0.1), rgba(0, 224, 255, 0.05));
            border: 1px solid rgba(0, 166, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            box-shadow: 0 0 80px rgba(0, 166, 255, 0.15);
        }

        .cta-panel h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-panel p {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
        }

        .cta-form input {
            flex: 1;
            padding: 14px 22px;
            border-radius: 50px;
            border: 1px solid var(--glass-border);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .cta-form input::placeholder {
            color: var(--text-muted);
        }

        .cta-form input:focus {
            outline: none;
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 166, 255, 0.25);
        }

        /* Footer */
        .site-footer {
            background-color: #080B14;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
        }

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

        /* Background decorations */
        .glow-orb {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            opacity: 0.4;
            pointer-events: none;
            z-index: 0;
        }

        .glow-orb.blue {
            background: rgba(0, 166, 255, 0.3);
            width: 400px;
            height: 400px;
        }

        .glow-orb.cyan {
            background: rgba(0, 224, 255, 0.2);
            width: 350px;
            height: 350px;
        }

        /* Responsive */
        @media (max-width: 1280px) {
            .hero-title {
                font-size: 48px;
            }
            .site-container {
                max-width: 1100px;
            }
        }

        @media (max-width: 1024px) {
            .hero-title {
                font-size: 42px;
            }
            .kpi-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: 1fr 1fr;
            }
            .feature-card.feature-large {
                grid-row: auto;
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .pricing-grid {
                grid-template-columns: 1fr;
                max-width: 500px;
                margin: 0 auto;
            }
            .pricing-card.featured {
                transform: none;
            }
            .pricing-card.featured:hover {
                transform: translateY(-4px);
            }
            .deep-content-wrapper {
                grid-template-columns: 1fr;
            }
            .demo-gallery {
                grid-template-columns: 1fr;
            }
            .demo-side {
                flex-direction: row;
            }
            .demo-side-item img {
                height: 180px;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .review-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-item {
                flex-direction: column;
                gap: 8px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .nav-links a {
                font-size: 13px;
                padding: 6px 10px;
            }
            .nav-cta {
                font-size: 12px;
                padding: 8px 16px;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .section-desc {
                font-size: 16px;
                margin-bottom: 32px;
            }
            .hero-section {
                padding: 130px 0 60px;
                min-height: 60vh;
            }
            .hero-title {
                font-size: 34px;
                letter-spacing: -0.5px;
            }
            .hero-subtitle {
                font-size: 17px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
                max-width: 340px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-data-row {
                gap: 12px;
            }
            .hero-data-item {
                min-width: 100px;
                padding: 10px 16px;
            }
            .hero-data-item .value {
                font-size: 22px;
            }
            .kpi-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .kpi-card {
                padding: 20px 14px;
            }
            .kpi-card .kpi-value {
                font-size: 28px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scenario-card {
                padding: 24px 20px;
            }
            .demo-main img {
                height: 280px;
            }
            .demo-side {
                flex-direction: column;
            }
            .demo-side-item img {
                height: 180px;
            }
            .case-card {
                flex-direction: column;
                gap: 12px;
                padding: 24px 20px;
            }
            .review-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .review-card {
                padding: 22px 18px;
            }
            .voice-item {
                padding: 20px 18px;
            }
            .news-item {
                padding: 18px 16px;
            }
            .brand-intro {
                padding: 32px 22px;
            }
            .cta-panel {
                padding: 36px 22px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .nav-dock {
                padding: 8px 16px;
                border-radius: 30px;
            }
            .nav-dock .logo {
                font-size: 18px;
            }
            .nav-links {
                display: none;
            }
            .nav-search-btn {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .navbar-toggler-custom {
                display: flex;
            }
            .mobile-drawer {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .site-container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-data-row {
                gap: 8px;
            }
            .hero-data-item {
                padding: 8px 12px;
                min-width: 80px;
            }
            .hero-data-item .value {
                font-size: 18px;
            }
            .hero-data-item .label {
                font-size: 11px;
            }
            .section-title {
                font-size: 24px;
            }
            .kpi-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .pricing-card {
                padding: 24px 18px;
            }
            .pricing-price {
                font-size: 36px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer-inner {
                padding: 0 18px 16px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0B1220;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-light: rgba(255, 255, 255, 0.10);
            --glass-border: rgba(255, 255, 255, 0.12);
            --primary-blue: #00A6FF;
            --accent-cyan: #00E0FF;
            --energy-green: #2BFF88;
            --text-primary: #EAF6FF;
            --text-secondary: rgba(234, 246, 255, 0.72);
            --text-muted: rgba(234, 246, 255, 0.48);
            --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.45);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Inter', 'Roboto', 'SF Mono', 'Courier New', monospace;
            --transition-base: all 0.25s ease;
            --container-max: 1280px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:hover {
            color: var(--accent-cyan);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }

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

        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }

        .section-label {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 48px;
            line-height: 1.8;
        }

        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }

        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 0 24px rgba(0, 166, 255, 0.5);
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
            cursor: pointer;
        }

        .btn-glow:hover {
            box-shadow: 0 0 36px rgba(0, 224, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.4);
        }

        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 16px;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
            cursor: pointer;
        }

        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
            transform: translateY(-2px);
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.25);
        }

        .tag-green {
            background: rgba(43, 255, 136, 0.12);
            color: var(--energy-green);
            border-color: rgba(43, 255, 136, 0.25);
        }

        /* Navigation - Floating Dock */
        .site-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1050;
            width: calc(100% - 48px);
            max-width: 1180px;
        }

        .nav-dock {
            background: rgba(10, 14, 26, 0.75);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
            transition: var(--transition-base);
        }

        .nav-dock .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .nav-dock .logo i {
            color: var(--accent-cyan);
        }

        .nav-dock .logo:hover {
            color: var(--text-primary);
        }

        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links li a.active {
            color: #fff;
            background: rgba(0, 166, 255, 0.2);
            border: 1px solid rgba(0, 166, 255, 0.35);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search-btn {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .nav-search-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
        }

        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
            border-radius: 50px;
        }

        .navbar-toggler-custom {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            width: 42px;
            height: 42px;
            display: none;
            align-items: center;
            justify-content: center;
            color: var(--text-primary);
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .drawer-menu {
            display: none;
            position: fixed;
            top: 80px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 48px);
            max-width: 520px;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 24px;
            padding: 20px;
            z-index: 1049;
            box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
        }

        .drawer-menu.open {
            display: block;
        }

        .drawer-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .drawer-menu ul li a {
            display: block;
            padding: 12px 16px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .drawer-menu ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
        }

        .drawer-menu ul li a.active {
            background: rgba(0, 166, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(0, 166, 255, 0.3);
        }

        /* Category Header */
        .category-header {
            padding: 140px 0 60px;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .category-header::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -180px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(0, 166, 255, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-header::after {
            content: '';
            position: absolute;
            bottom: -120px;
            left: -120px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(0, 224, 255, 0.1), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-header .site-container {
            position: relative;
            z-index: 1;
        }

        .category-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

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

        .category-breadcrumb a:hover {
            color: var(--accent-cyan);
        }

        .category-breadcrumb .separator {
            color: var(--text-muted);
        }

        .category-header h1 {
            font-size: 48px;
            font-weight: 700;
            letter-spacing: -1px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .category-header .lead {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Filter Toolbar */
        .filter-bar-wrapper {
            padding: 24px 0 0;
            position: relative;
            z-index: 2;
        }

        .filter-bar {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
            margin-right: 4px;
        }

        .filter-btn {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .filter-btn:hover {
            border-color: rgba(0, 166, 255, 0.4);
            color: var(--text-primary);
            background: rgba(0, 166, 255, 0.08);
        }

        .filter-btn.active {
            background: rgba(0, 166, 255, 0.18);
            border-color: rgba(0, 166, 255, 0.45);
            color: #fff;
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.2);
        }

        .filter-sort-select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            padding: 8px 16px;
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition-base);
            min-width: 140px;
        }

        .filter-sort-select:focus {
            border-color: var(--accent-cyan);
            outline: none;
            box-shadow: 0 0 12px rgba(0, 224, 255, 0.2);
        }

        .filter-sort-select option {
            background: var(--bg-secondary);
            color: var(--text-primary);
        }

        /* Rank List Cards */
        .rank-list-section {
            padding: 40px 0 60px;
        }

        .rank-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.35);
        }

        .rank-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 65px rgba(0, 166, 255, 0.18);
        }

        .rank-card-image {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }

        .rank-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .rank-card:hover .rank-card-image img {
            transform: scale(1.04);
        }

        .rank-card-image .rank-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(10, 14, 26, 0.8);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;
            padding: 6px 14px;
            font-size: 12px;
            font-weight: 600;
            color: var(--energ-green);
            color: var(--energy-green);
            letter-spacing: 0.5px;
        }

        .rank-card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .rank-card-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .rank-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rank-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }

        .rank-card-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 4px;
        }

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

        .rank-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-blue);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }

        .rank-card-link:hover {
            color: var(--accent-cyan);
            gap: 10px;
        }

        .rank-card-link i {
            font-size: 12px;
        }

        /* Featured Deep Section */
        .featured-deep-section {
            background: var(--bg-secondary);
        }

        .featured-deep-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 28px 30px;
            transition: var(--transition-base);
            height: 100%;
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.35);
        }

        .featured-deep-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 22px 60px rgba(0, 166, 255, 0.16);
        }

        .featured-deep-card .featured-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(0, 166, 255, 0.12);
            border: 1px solid rgba(0, 166, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .featured-deep-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
            color: var(--text-primary);
        }

        .featured-deep-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .featured-deep-card .featured-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-blue);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .featured-deep-card .featured-link:hover {
            color: var(--accent-cyan);
        }

        /* Data Snapshot Cards */
        .data-snapshot-section {
            background: var(--bg-primary);
        }

        .snapshot-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 28px 26px;
            text-align: center;
            transition: var(--transition-base);
            height: 100%;
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.35);
        }

        .snapshot-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 22px 60px rgba(0, 166, 255, 0.16);
        }

        .snapshot-number {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            letter-spacing: -1.5px;
            margin-bottom: 8px;
            color: var(--energy-green);
            line-height: 1.1;
        }

        .snapshot-number.blue {
            color: var(--primary-blue);
        }

        .snapshot-number.cyan {
            color: var(--accent-cyan);
        }

        .snapshot-label {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .snapshot-sub {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* Related Categories */
        .related-categories-section {
            background: var(--bg-secondary);
        }

        .related-cat-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 24px 26px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: var(--transition-base);
            height: 100%;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }

        .related-cat-card:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 18px 50px rgba(0, 166, 255, 0.16);
        }

        .related-cat-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            background: rgba(0, 166, 255, 0.12);
            border: 1px solid rgba(0, 166, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .related-cat-info h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
            letter-spacing: -0.3px;
            color: var(--text-primary);
        }

        .related-cat-info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.5;
        }

        /* Subscribe CTA */
        .subscribe-cta-section {
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }

        .subscribe-cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 166, 255, 0.1), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .subscribe-cta-box {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            z-index: 1;
            box-shadow: var(--shadow-glass);
            max-width: 700px;
            margin: 0 auto;
        }

        .subscribe-cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .subscribe-cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 200px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            padding: 14px 22px;
            font-size: 15px;
            color: var(--text-primary);
            transition: var(--transition-base);
        }

        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }

        .subscribe-form input:focus {
            border-color: var(--accent-cyan);
            outline: none;
            box-shadow: 0 0 16px rgba(0, 224, 255, 0.2);
        }

        .subscribe-form .btn-glow {
            flex-shrink: 0;
        }

        .subscribe-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 16px;
        }

        /* FAQ Section */
        .faq-section {
            background: var(--bg-secondary);
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition-base);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }

        .faq-item:hover {
            border-color: rgba(0, 166, 255, 0.35);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 20px 24px;
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition-base);
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-question .faq-icon {
            font-size: 16px;
            color: var(--accent-cyan);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 60px 0 32px;
            position: relative;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links li a {
                padding: 8px 12px;
                font-size: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .navbar-toggler-custom {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .nav-dock {
                padding: 10px 18px;
            }

            .site-nav {
                top: 12px;
                width: calc(100% - 24px);
            }

            .drawer-menu {
                top: 72px;
            }

            section {
                padding: 48px 0;
            }

            .category-header {
                padding: 110px 0 40px;
            }

            .category-header h1 {
                font-size: 34px;
            }

            .section-title {
                font-size: 28px;
            }

            .section-desc {
                font-size: 16px;
            }

            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .filter-group {
                width: 100%;
                justify-content: flex-start;
            }

            .filter-sort-select {
                width: 100%;
            }

            .subscribe-cta-box {
                padding: 32px 24px;
            }

            .subscribe-cta-box h2 {
                font-size: 26px;
            }

            .subscribe-form {
                flex-direction: column;
            }

            .subscribe-form .btn-glow {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

        @media (max-width: 480px) {
            .site-container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .nav-dock .logo {
                font-size: 18px;
            }

            .nav-dock .logo i {
                font-size: 16px;
            }

            .category-header h1 {
                font-size: 28px;
            }

            .category-header .lead {
                font-size: 15px;
            }

            .rank-card-title {
                font-size: 18px;
            }

            .rank-card-body {
                padding: 18px 18px 20px;
            }

            .featured-deep-card {
                padding: 22px 20px;
            }

            .snapshot-number {
                font-size: 32px;
            }

            .faq-question {
                font-size: 16px;
                padding: 16px 18px;
            }

            .faq-answer {
                padding: 0 18px 16px;
                font-size: 15px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0B1220;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-light: rgba(255, 255, 255, 0.10);
            --glass-border: rgba(255, 255, 255, 0.12);
            --primary-blue: #00A6FF;
            --accent-cyan: #00E0FF;
            --energy-green: #2BFF88;
            --text-primary: #EAF6FF;
            --text-secondary: rgba(234, 246, 255, 0.72);
            --text-muted: rgba(234, 246, 255, 0.48);
            --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.45);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Inter', 'Roboto', 'SF Mono', 'Courier New', monospace;
            --transition-base: all 0.25s ease;
            --container-max: 1280px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: 72px 0;
            position: relative;
        }

        .section-alt {
            background-color: var(--bg-secondary);
        }
        .section-label {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 760px;
            margin-bottom: 44px;
            line-height: 1.85;
        }

        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 0 24px rgba(0, 166, 255, 0.5);
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
            cursor: pointer;
        }
        .btn-glow:hover {
            box-shadow: 0 0 36px rgba(0, 224, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.4);
        }
        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 16px;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
            cursor: pointer;
        }
        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
            transform: translateY(-2px);
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.25);
            transition: var(--transition-base);
        }
        .tag:hover {
            background: rgba(0, 166, 255, 0.25);
            color: #fff;
        }
        .tag-green {
            background: rgba(43, 255, 136, 0.12);
            color: var(--energy-green);
            border-color: rgba(43, 255, 136, 0.25);
        }
        .tag-orange {
            background: rgba(255, 170, 0, 0.12);
            color: #FFB340;
            border-color: rgba(255, 170, 0, 0.25);
        }
        .tag-red {
            background: rgba(255, 77, 77, 0.12);
            color: #FF6B6B;
            border-color: rgba(255, 77, 77, 0.25);
        }

        /* Navigation - Floating Dock */
        .site-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1050;
            width: calc(100% - 48px);
            max-width: 1180px;
        }
        .nav-dock {
            background: rgba(10, 14, 26, 0.78);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
            transition: var(--transition-base);
        }
        .nav-dock .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.5px;
        }
        .nav-dock .logo i {
            color: var(--accent-cyan);
            margin-right: 8px;
        }
        .nav-dock .logo:hover {
            color: #fff;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li {
            margin: 0;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: #fff;
            background: rgba(0, 166, 255, 0.16);
            border: 1px solid rgba(0, 166, 255, 0.3);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search-btn {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-secondary);
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 15px;
        }
        .nav-search-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
        }
        .nav-cta {
            padding: 10px 24px;
            font-size: 14px;
            border-radius: 30px;
            white-space: nowrap;
        }
        .navbar-toggler-custom {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-primary);
            width: 42px;
            height: 42px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 18px;
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* 移动端导航抽屉 */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 80px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 48px);
            max-width: 560px;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 20px;
            z-index: 1049;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
        }
        .mobile-drawer.open {
            display: block;
        }
        .mobile-drawer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mobile-drawer ul li a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        .mobile-drawer ul li a:hover,
        .mobile-drawer ul li a.active {
            background: rgba(0, 166, 255, 0.12);
            color: #fff;
        }

        /* 面包屑 */
        .breadcrumb-bar {
            padding-top: 120px;
            padding-bottom: 0;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-custom .sep {
            color: rgba(234, 246, 255, 0.35);
        }
        .breadcrumb-custom .current {
            color: var(--accent-cyan);
        }

        /* 分类页头部 */
        .category-header {
            padding-top: 40px;
            padding-bottom: 48px;
        }
        .category-header h1 {
            font-size: 42px;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .category-header .cat-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 780px;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* 筛选工具栏 */
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            border-radius: var(--radius-md);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            margin-bottom: 36px;
        }
        .filter-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .filter-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            margin-right: 4px;
        }
        .filter-btn {
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .filter-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
        }
        .filter-btn.active {
            background: rgba(0, 166, 255, 0.16);
            border-color: rgba(0, 166, 255, 0.4);
            color: #fff;
        }
        .filter-select {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 24px;
            color: var(--text-primary);
            padding: 8px 16px;
            font-size: 13px;
            cursor: pointer;
            transition: var(--transition-base);
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23EAF6FF' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 32px;
        }
        .filter-select:focus {
            border-color: var(--accent-cyan);
            outline: none;
        }
        .filter-select option {
            background-color: #0B1220;
            color: var(--text-primary);
        }

        /* 列表卡片 */
        .list-card {
            display: flex;
            flex-direction: column;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }
        .list-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .list-card .card-img-wrap {
            position: relative;
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
        }
        .list-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .list-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .list-card .card-img-wrap .img-overlay {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(10,14,26,0.05) 0%, rgba(10,14,26,0.6) 100%);
            pointer-events: none;
        }
        .list-card .card-img-wrap .badge-top {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }
        .list-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .list-card .card-title {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .list-card .card-title a {
            color: var(--text-primary);
        }
        .list-card .card-title a:hover {
            color: var(--accent-cyan);
        }
        .list-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .list-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .list-card .card-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .list-card .read-more-btn {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .list-card .read-more-btn:hover {
            color: #fff;
            gap: 8px;
        }

        /* 精选专题 */
        .featured-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }
        .featured-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .featured-card .featured-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
        }
        .featured-card .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .featured-card:hover .featured-img img {
            transform: scale(1.05);
        }
        .featured-card .featured-body {
            padding: 22px 24px;
        }
        .featured-card .featured-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .featured-card .featured-title a {
            color: var(--text-primary);
        }
        .featured-card .featured-title a:hover {
            color: var(--accent-cyan);
        }
        .featured-card .featured-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 14px;
        }
        .featured-card .featured-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 数据快照 */
        .stat-snapshot-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }
        .stat-snapshot-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 24px 22px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
            transition: var(--transition-base);
            text-align: left;
        }
        .stat-snapshot-card:hover {
            border-color: rgba(0, 166, 255, 0.4);
            transform: translateY(-3px);
        }
        .stat-snapshot-card .stat-number {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: -1px;
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-snapshot-card .stat-number.green {
            color: var(--energy-green);
        }
        .stat-snapshot-card .stat-number.orange {
            color: #FFB340;
        }
        .stat-snapshot-card .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            margin-bottom: 4px;
        }
        .stat-snapshot-card .stat-trend {
            font-size: 13px;
            color: var(--text-muted);
        }
        .stat-snapshot-card .stat-trend.up {
            color: var(--energy-green);
        }
        .stat-snapshot-card .stat-trend.down {
            color: #FF6B6B;
        }

        /* 深度阅读 */
        .insight-article {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 40px 44px;
            box-shadow: var(--shadow-glass);
        }
        .insight-article h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 18px;
            line-height: 1.35;
        }
        .insight-article h3 {
            font-size: 20px;
            font-weight: 600;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--accent-cyan);
        }
        .insight-article p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .insight-article .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            padding-bottom: 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* 相关分类入口 */
        .related-cat-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 22px 24px;
            transition: var(--transition-base);
            height: 100%;
        }
        .related-cat-card:hover {
            border-color: rgba(0, 166, 255, 0.4);
            transform: translateY(-3px);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
        }
        .related-cat-card .cat-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            border-radius: 14px;
            background: rgba(0, 166, 255, 0.12);
            border: 1px solid rgba(0, 166, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
        }
        .related-cat-card .cat-info h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-primary);
        }
        .related-cat-card .cat-info p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: var(--transition-base);
        }
        .faq-accordion .accordion-item:hover {
            border-color: rgba(0, 166, 255, 0.35);
        }
        .faq-accordion .accordion-header {
            margin: 0;
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 600;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
            border-radius: var(--radius-md) !important;
            cursor: pointer;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 166, 255, 0.08);
            color: #fff;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-cyan);
            outline-offset: -2px;
        }
        .faq-accordion .accordion-button::after {
            filter: brightness(0) invert(1);
            opacity: 0.6;
        }
        .faq-accordion .accordion-body {
            background: transparent;
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.85;
            padding: 20px 24px 24px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(0,166,255,0.08), rgba(0,224,255,0.04));
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 166, 255, 0.2);
            padding: 56px 44px;
            text-align: center;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
        }
        .cta-section h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .cta-section .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 480px;
            margin: 0 auto;
        }
        .cta-section .cta-input {
            flex: 1;
            min-width: 220px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 30px;
            padding: 14px 22px;
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }
        .cta-section .cta-input::placeholder {
            color: var(--text-muted);
        }
        .cta-section .cta-input:focus {
            border-color: var(--accent-cyan);
            outline: none;
            box-shadow: 0 0 16px rgba(0, 224, 255, 0.25);
        }

        /* 页脚 */
        .site-footer {
            background-color: rgba(6, 10, 18, 0.95);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .nav-links a {
                padding: 8px 12px;
                font-size: 14px;
            }
            .nav-dock {
                padding: 10px 18px;
            }
            .category-header h1 {
                font-size: 36px;
            }
            .section-title {
                font-size: 30px;
            }
            .insight-article {
                padding: 32px 28px;
            }
        }
        @media (max-width: 992px) {
            .nav-links {
                display: none;
            }
            .navbar-toggler-custom {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            section {
                padding: 56px 0;
            }
            .category-header {
                padding-top: 24px;
                padding-bottom: 36px;
            }
            .category-header h1 {
                font-size: 32px;
            }
            .cta-section {
                padding: 40px 28px;
            }
        }
        @media (max-width: 768px) {
            .site-nav {
                top: 12px;
                width: calc(100% - 24px);
            }
            .nav-dock {
                padding: 8px 16px;
                border-radius: 40px;
            }
            .nav-dock .logo {
                font-size: 18px;
            }
            .breadcrumb-bar {
                padding-top: 88px;
            }
            section {
                padding: 44px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .category-header h1 {
                font-size: 28px;
            }
            .category-header .cat-desc {
                font-size: 15px;
            }
            .filter-toolbar {
                padding: 14px 16px;
                gap: 10px;
            }
            .stat-snapshot-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-snapshot-card .stat-number {
                font-size: 26px;
            }
            .insight-article {
                padding: 24px 20px;
            }
            .insight-article h2 {
                font-size: 23px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .list-card .card-body {
                padding: 16px 18px 20px;
            }
            .list-card .card-title {
                font-size: 17px;
            }
            .featured-card .featured-body {
                padding: 18px 18px;
            }
            .faq-accordion .accordion-button {
                font-size: 16px;
                padding: 16px 18px;
            }
            .faq-accordion .accordion-body {
                font-size: 14px;
                padding: 16px 18px 20px;
            }
        }
        @media (max-width: 480px) {
            .site-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-dock .logo {
                font-size: 16px;
            }
            .nav-dock .logo i {
                margin-right: 4px;
            }
            .nav-search-btn {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }
            .navbar-toggler-custom {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 22px;
            }
            .stat-snapshot-grid {
                grid-template-columns: 1fr;
            }
            .filter-btn {
                padding: 6px 14px;
                font-size: 12px;
            }
            .filter-select {
                padding: 6px 12px;
                font-size: 12px;
                padding-right: 28px;
            }
            .cta-section .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn-glow, .btn-outline-glow {
                width: 100%;
                max-width: 280px;
                padding: 12px 24px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0B1220;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-light: rgba(255, 255, 255, 0.10);
            --glass-border: rgba(255, 255, 255, 0.12);
            --primary-blue: #00A6FF;
            --accent-cyan: #00E0FF;
            --energy-green: #2BFF88;
            --text-primary: #EAF6FF;
            --text-secondary: rgba(234, 246, 255, 0.72);
            --text-muted: rgba(234, 246, 255, 0.48);
            --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.45);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Inter', 'Roboto', 'SF Mono', 'Courier New', monospace;
            --transition-base: all 0.25s ease;
            --container-max: 1280px;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            padding-top: 120px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: 72px 0;
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-secondary);
        }
        .section-label {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 48px;
            line-height: 1.8;
        }
        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .btn-glow {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 0 24px rgba(0, 166, 255, 0.5);
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-glow:hover {
            box-shadow: 0 0 36px rgba(0, 224, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.4);
        }
        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 16px;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
            transform: translateY(-2px);
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.25);
            margin-right: 8px;
            margin-bottom: 8px;
        }
        .tag-green {
            background: rgba(43, 255, 136, 0.12);
            color: var(--energy-green);
            border-color: rgba(43, 255, 136, 0.25);
        }
        /* Navigation */
        .site-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1050;
            width: calc(100% - 48px);
            max-width: 1180px;
        }
        .nav-dock {
            background: rgba(10, 14, 26, 0.75);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
            transition: var(--transition-base);
        }
        .nav-dock .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-dock .logo i {
            color: var(--accent-cyan);
            font-size: 22px;
        }
        .nav-links {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
        }
        .nav-links a {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 40px;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--accent-cyan);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-links a.active {
            color: #fff;
            background: rgba(0, 166, 255, 0.18);
            box-shadow: inset 0 0 0 1px rgba(0, 166, 255, 0.3);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search-btn {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
            cursor: pointer;
            font-size: 15px;
        }
        .nav-search-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.05);
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
            white-space: nowrap;
        }
        .navbar-toggler-custom {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition-base);
            align-items: center;
            justify-content: center;
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .mobile-nav-drawer {
            display: none;
            margin-top: 12px;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 22px;
            padding: 16px;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
        }
        .mobile-nav-drawer ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .mobile-nav-drawer a {
            display: block;
            padding: 12px 14px;
            border-radius: 14px;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 500;
            transition: var(--transition-base);
        }
        .mobile-nav-drawer a:hover,
        .mobile-nav-drawer a.active {
            background: rgba(0, 166, 255, 0.15);
            color: var(--accent-cyan);
        }
        .mobile-nav-drawer .btn-glow {
            margin-top: 12px;
            width: 100%;
            display: block;
            text-align: center;
        }
        /* Category hero */
        .category-hero {
            position: relative;
            padding: 90px 0 80px;
            background-image: url('/assets/images/53cbcd4d6a7537d2.webp');
            background-size: cover;
            background-position: center;
            border-radius: 0 0 40px 40px;
            overflow: hidden;
            isolation: isolate;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 26, 0.86), rgba(20, 38, 68, 0.58));
            z-index: -1;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            margin-bottom: 20px;
            padding: 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-item + .breadcrumb-item::before {
            content: "›";
            margin: 0 8px;
            color: var(--text-muted);
        }
        .breadcrumb-item a {
            color: var(--accent-cyan);
        }
        .breadcrumb-item.active {
            color: var(--text-secondary);
        }
        .category-hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 24px;
            max-width: 850px;
            color: #fff;
        }
        .category-hero .lead {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 840px;
            line-height: 1.9;
            margin-bottom: 0;
        }
        /* Filter bar */
        .filter-bar {
            padding: 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            background: rgba(255, 255, 255, 0.02);
        }
        .filter-bar .site-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .filter-tag {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-secondary);
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .filter-tag:hover,
        .filter-tag.active {
            background: rgba(0, 166, 255, 0.14);
            border-color: rgba(0, 166, 255, 0.5);
            color: #fff;
        }
        .filter-sort {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .filter-sort label {
            font-size: 14px;
            color: var(--text-muted);
        }
        .filter-sort select {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-primary);
            padding: 10px 18px;
            border-radius: 30px;
            font-size: 14px;
            outline: none;
            transition: var(--transition-base);
        }
        .filter-sort select:hover {
            border-color: rgba(0, 166, 255, 0.4);
        }
        /* Post list */
        .post-list-section .section-title {
            margin-bottom: 12px;
        }
        .post-card {
            overflow: hidden;
            display: flex;
            flex-direction: column;
            height: 100%;
            border-radius: var(--radius-lg);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }
        .post-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .post-card .card-img {
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .post-card .card-body {
            padding: 22px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .post-card .card-meta {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .post-card .card-title {
            font-size: 21px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .post-card .card-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
            flex: 1;
        }
        .post-card .card-tags {
            margin-bottom: 18px;
        }
        .post-card .btn-outline-glow {
            padding: 10px 20px;
            font-size: 14px;
            align-self: flex-start;
        }
        /* Featured editorial */
        .featured-editorial .editorial-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            overflow: hidden;
            height: 100%;
            transition: var(--transition-base);
            box-shadow: var(--shadow-glass);
        }
        .featured-editorial .editorial-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .featured-editorial .editorial-img {
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
        }
        .featured-editorial .editorial-body {
            padding: 24px;
        }
        .featured-editorial .editorial-meta {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .featured-editorial .editorial-title {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .featured-editorial .editorial-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 18px;
        }
        /* Data snapshot */
        .data-snapshot .data-card {
            text-align: center;
            padding: 28px 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
            height: 100%;
        }
        .data-snapshot .data-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .data-snapshot .data-value {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
            margin-bottom: 8px;
            font-variant-numeric: tabular-nums;
        }
        .data-snapshot .data-value.green {
            color: var(--energy-green);
        }
        .data-snapshot .data-label {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        /* Related categories */
        .related-categories .related-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            padding: 28px;
            height: 100%;
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .related-categories .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .related-categories .related-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
        }
        .related-categories .related-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .related-categories .related-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .related-categories .related-link {
            font-weight: 600;
            font-size: 15px;
        }
        /* Subscribe CTA */
        .subscribe-cta .cta-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 32px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            padding: 50px 40px;
            box-shadow: var(--shadow-glass);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .subscribe-cta .cta-card::before {
            content: "";
            position: absolute;
            top: -120px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: rgba(0, 166, 255, 0.16);
            border-radius: 50%;
            filter: blur(50px);
            pointer-events: none;
        }
        .subscribe-cta .cta-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .subscribe-cta .cta-text {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .subscribe-cta .cta-form {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            max-width: 520px;
            margin: 0 auto;
        }
        .subscribe-cta .cta-form input {
            flex: 1 1 250px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.14);
            color: var(--text-primary);
            padding: 14px 20px;
            border-radius: 50px;
            font-size: 15px;
            outline: none;
            transition: var(--transition-base);
        }
        .subscribe-cta .cta-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-cta .cta-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.12);
        }
        /* FAQ */
        .faq-section .faq-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            overflow: hidden;
            margin-bottom: 16px;
            transition: var(--transition-base);
        }
        .faq-section .faq-card.open {
            border-color: rgba(0, 166, 255, 0.5);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 18px;
            font-weight: 600;
            cursor: pointer;
            width: 100%;
            text-align: left;
            transition: var(--transition-base);
        }
        .faq-question i {
            color: var(--accent-cyan);
            transition: transform 0.3s ease;
            font-size: 16px;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.8;
        }
        .faq-answer-inner {
            padding-bottom: 22px;
        }
        /* Footer */
        .site-footer {
            background-color: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 60px 0 30px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-brand p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: var(--text-secondary);
            font-size: 15px;
            transition: var(--transition-base);
        }
        .footer-col a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .section-title {
                font-size: 30px;
            }
            .category-hero h1 {
                font-size: 38px;
            }
        }
        @media (max-width: 991.98px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .navbar-toggler-custom {
                display: inline-flex;
            }
            body {
                padding-top: 96px;
            }
            .site-nav {
                top: 14px;
                width: calc(100% - 28px);
            }
            .nav-dock {
                padding: 8px 16px;
                border-radius: 30px;
            }
            .mobile-nav-drawer.show {
                display: block;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 88px;
            }
            section {
                padding: 52px 0;
            }
            .category-hero {
                padding: 64px 0 52px;
                border-radius: 0 0 28px 28px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero .lead {
                font-size: 16px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-desc {
                font-size: 16px;
                margin-bottom: 32px;
            }
            .filter-bar .site-container {
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-sort {
                width: 100%;
                justify-content: flex-start;
                flex-wrap: wrap;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .subscribe-cta .cta-card {
                padding: 36px 22px;
            }
        }
        @media (max-width: 520px) {
            .site-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .post-card .card-title {
                font-size: 18px;
            }
            .featured-editorial .editorial-title {
                font-size: 18px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0B1220;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-light: rgba(255, 255, 255, 0.10);
            --glass-border: rgba(255, 255, 255, 0.12);
            --primary-blue: #00A6FF;
            --accent-cyan: #00E0FF;
            --energy-green: #2BFF88;
            --text-primary: #EAF6FF;
            --text-secondary: rgba(234, 246, 255, 0.72);
            --text-muted: rgba(234, 246, 255, 0.48);
            --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.45);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Inter', 'Roboto', 'SF Mono', 'Courier New', monospace;
            --transition-base: all 0.25s ease;
            --container-max: 1280px;
        }

        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-secondary);
        }
        .section-label {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 48px;
            line-height: 1.8;
        }
        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .btn-glow {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            border: none;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            box-shadow: 0 0 24px rgba(0, 166, 255, 0.5);
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-glow:hover {
            box-shadow: 0 0 36px rgba(0, 224, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.4);
        }
        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 16px;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
        }
        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
            transform: translateY(-2px);
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.25);
        }
        .tag-green {
            background: rgba(43, 255, 136, 0.12);
            color: var(--energy-green);
            border-color: rgba(43, 255, 136, 0.25);
        }
        .tag-purple {
            background: rgba(183, 106, 255, 0.12);
            color: #d4a6ff;
            border-color: rgba(183, 106, 255, 0.25);
        }

        /* Navigation - Floating Dock */
        .site-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1050;
            width: calc(100% - 48px);
            max-width: 1180px;
        }
        .nav-dock {
            background: rgba(10, 14, 26, 0.75);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
            transition: var(--transition-base);
        }
        .nav-dock .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.3px;
        }
        .nav-dock .logo i {
            color: var(--accent-cyan);
            margin-right: 8px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 6px;
        }
        .nav-links li a {
            display: block;
            padding: 8px 16px;
            border-radius: 30px;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links li a.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(0, 166, 255, 0.3), rgba(0, 224, 255, 0.2));
            box-shadow: 0 0 18px rgba(0, 166, 255, 0.25);
            border: 1px solid rgba(0, 224, 255, 0.3);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .nav-search-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.08);
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
            white-space: nowrap;
        }
        .navbar-toggler-custom {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        /* Mobile drawer */
        .nav-drawer {
            display: none;
            position: fixed;
            top: 80px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1049;
            width: calc(100% - 40px);
            max-width: 500px;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 16px;
            box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
        }
        .nav-drawer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-drawer ul li a {
            display: block;
            padding: 12px 16px;
            border-radius: 12px;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 500;
            transition: var(--transition-base);
        }
        .nav-drawer ul li a:hover,
        .nav-drawer ul li a.active {
            background: rgba(0, 166, 255, 0.15);
            color: var(--accent-cyan);
        }

        /* Breadcrumb */
        .breadcrumb-wrapper {
            padding-top: 140px;
            padding-bottom: 0;
            background: transparent;
        }
        .breadcrumb-glass {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: 50px;
            padding: 8px 20px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            font-size: 14px;
            color: var(--text-secondary);
        }
        .breadcrumb-glass a {
            color: var(--text-secondary);
        }
        .breadcrumb-glass a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-glass .separator {
            color: var(--text-muted);
        }
        .breadcrumb-glass .current {
            color: var(--text-primary);
            font-weight: 500;
        }

        /* Category Hero */
        .category-hero {
            padding: 48px 0 40px;
            position: relative;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            top: 0;
            right: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 166, 255, 0.12) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }
        .category-hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.8px;
        }
        .category-hero h1 .highlight {
            background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero .hero-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 780px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Filter toolbar */
        .filter-toolbar {
            padding: 24px 0 12px;
        }
        .filter-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }
        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            margin-right: 4px;
        }
        .filter-btn {
            padding: 7px 16px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: transparent;
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .filter-btn:hover {
            border-color: rgba(0, 224, 255, 0.4);
            color: var(--accent-cyan);
        }
        .filter-btn.active {
            background: linear-gradient(135deg, rgba(0, 166, 255, 0.3), rgba(0, 224, 255, 0.2));
            border-color: rgba(0, 224, 255, 0.4);
            color: #fff;
            box-shadow: 0 0 12px rgba(0, 166, 255, 0.2);
        }
        .filter-select {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 20px;
            padding: 7px 16px;
            color: var(--text-primary);
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition-base);
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='rgba(234,246,255,0.6)' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 34px;
        }
        .filter-select:focus {
            border-color: var(--accent-cyan);
            outline: none;
        }

        /* Content cards list */
        .content-list-section {
            padding-top: 24px;
            padding-bottom: 60px;
        }
        .content-card-row {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .content-card-horizontal {
            display: flex;
            gap: 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 10px 34px rgba(0, 0, 0, 0.3);
            transition: var(--transition-base);
            overflow: hidden;
            padding: 16px;
        }
        .content-card-horizontal:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 18px 50px rgba(0, 166, 255, 0.15);
        }
        .content-card-horizontal .card-cover {
            width: 280px;
            min-width: 280px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            aspect-ratio: 16/9;
            position: relative;
        }
        .content-card-horizontal .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .content-card-horizontal:hover .card-cover img {
            transform: scale(1.05);
        }
        .content-card-horizontal .card-body-flex {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 4px 6px;
        }
        .content-card-horizontal .card-title {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .content-card-horizontal .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card-horizontal .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .content-card-horizontal .card-meta .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .content-card-horizontal .card-meta .meta-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 14px;
            font-size: 12px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.2);
        }
        .content-card-horizontal .card-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .content-card-horizontal .card-actions .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-blue);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition-base);
        }
        .content-card-horizontal .card-actions .btn-read-more:hover {
            color: var(--accent-cyan);
            gap: 10px;
        }
        .content-card-horizontal .card-actions .interaction {
            display: flex;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .content-card-horizontal .card-actions .interaction span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .content-card-horizontal .card-actions .interaction .likes {
            color: var(--energy-green);
        }
        .content-card-horizontal .card-actions .interaction .comments {
            color: var(--text-secondary);
        }

        /* Load more */
        .load-more-wrap {
            text-align: center;
            margin-top: 32px;
        }

        /* Featured section */
        .featured-section {
            padding: 60px 0;
        }
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .featured-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
            overflow: hidden;
        }
        .featured-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.16);
        }
        .featured-card .featured-cover {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }
        .featured-card .featured-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .featured-card:hover .featured-cover img {
            transform: scale(1.04);
        }
        .featured-card .featured-content {
            padding: 20px 22px;
        }
        .featured-card .featured-title {
            font-size: 20px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .featured-card .featured-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .featured-card .featured-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Data snapshot */
        .data-snapshot-section {
            padding: 60px 0;
        }
        .data-snap-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .data-snap-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 24px 20px;
            text-align: center;
            transition: var(--transition-base);
        }
        .data-snap-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 18px 50px rgba(0, 166, 255, 0.14);
        }
        .data-snap-card .snap-value {
            font-size: 36px;
            font-weight: 700;
            font-family: var(--font-mono);
            background: linear-gradient(135deg, var(--primary-blue), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 6px;
        }
        .data-snap-card .snap-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .data-snap-card .snap-change {
            display: inline-block;
            margin-top: 8px;
            font-size: 13px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 12px;
        }
        .data-snap-card .snap-change.up {
            color: var(--energy-green);
            background: rgba(43, 255, 136, 0.1);
        }
        .data-snap-card .snap-change.down {
            color: #ff6b6b;
            background: rgba(255, 107, 107, 0.1);
        }

        /* Related categories */
        .related-cats-section {
            padding: 60px 0;
        }
        .related-cats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-cat-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: var(--transition-base);
            text-align: center;
        }
        .related-cat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.4);
            box-shadow: 0 18px 50px rgba(0, 166, 255, 0.14);
        }
        .related-cat-card .cat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(0, 166, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 24px;
            color: var(--accent-cyan);
        }
        .related-cat-card .cat-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .related-cat-card .cat-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Subscribe CTA */
        .subscribe-cta-section {
            padding: 70px 0;
        }
        .subscribe-cta-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .subscribe-cta-card::before {
            content: '';
            position: absolute;
            top: -60%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 166, 255, 0.1) 0%, transparent 65%);
            pointer-events: none;
            border-radius: 50%;
        }
        .subscribe-cta-card h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .subscribe-cta-card p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .subscribe-form input[type="email"] {
            width: 100%;
            max-width: 380px;
            padding: 14px 22px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            font-size: 15px;
            transition: var(--transition-base);
        }
        .subscribe-form input[type="email"]::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--accent-cyan);
            outline: none;
            box-shadow: 0 0 18px rgba(0, 224, 255, 0.2);
        }

        /* FAQ */
        .faq-section {
            padding: 60px 0;
        }
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }
        .accordion-custom .accordion-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-item:hover {
            border-color: rgba(0, 166, 255, 0.3);
        }
        .accordion-custom .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 17px;
            padding: 20px 22px;
            border: none;
            box-shadow: none;
            transition: var(--transition-base);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 166, 255, 0.06);
            color: var(--accent-cyan);
            border-bottom: 1px solid rgba(0, 224, 255, 0.2);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--accent-cyan);
            outline-offset: -2px;
        }
        .accordion-custom .accordion-button::after {
            filter: brightness(0.8) sepia(1) hue-rotate(170deg) saturate(5);
        }
        .accordion-custom .accordion-body {
            background: transparent;
            color: var(--text-secondary);
            font-size: 16px;
            line-height: 1.75;
            padding: 18px 22px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 60px 0 30px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links li a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-dock {
                padding: 10px 16px;
            }
            .category-hero h1 {
                font-size: 36px;
            }
            .data-snap-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-card-horizontal .card-cover {
                width: 220px;
                min-width: 220px;
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-cats-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 20px;
            }
            .footer-col:last-child {
                display: none;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 48px 0;
            }
            .site-nav {
                top: 12px;
                width: calc(100% - 24px);
            }
            .nav-dock {
                border-radius: 30px;
                padding: 8px 14px;
            }
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .navbar-toggler-custom {
                display: flex;
            }
            .breadcrumb-wrapper {
                padding-top: 110px;
            }
            .category-hero {
                padding: 32px 0 24px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero .hero-desc {
                font-size: 15px;
                line-height: 1.7;
            }
            .section-title {
                font-size: 26px;
            }
            .section-desc {
                font-size: 15px;
            }
            .filter-bar {
                padding: 12px 14px;
                gap: 8px;
            }
            .filter-btn {
                padding: 6px 12px;
                font-size: 12px;
            }
            .filter-select {
                padding: 6px 30px 6px 12px;
                font-size: 12px;
            }
            .content-card-horizontal {
                flex-direction: column;
                gap: 14px;
                padding: 14px;
            }
            .content-card-horizontal .card-cover {
                width: 100%;
                min-width: unset;
                aspect-ratio: 16/9;
            }
            .content-card-horizontal .card-title {
                font-size: 17px;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .data-snap-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .data-snap-card .snap-value {
                font-size: 28px;
            }
            .related-cats-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-cta-card {
                padding: 32px 20px;
            }
            .subscribe-cta-card h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
        }

        @media (max-width: 480px) {
            .site-container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .nav-dock .logo {
                font-size: 18px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .data-snap-grid {
                grid-template-columns: 1fr;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .btn-glow,
            .btn-outline-glow {
                padding: 12px 22px;
                font-size: 14px;
                width: 100%;
            }
            .subscribe-form input[type="email"] {
                max-width: 100%;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0E1A;
            --bg-secondary: #0B1220;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-light: rgba(255, 255, 255, 0.10);
            --glass-border: rgba(255, 255, 255, 0.12);
            --primary-blue: #00A6FF;
            --accent-cyan: #00E0FF;
            --energy-green: #2BFF88;
            --text-primary: #EAF6FF;
            --text-secondary: rgba(234, 246, 255, 0.72);
            --text-muted: rgba(234, 246, 255, 0.48);
            --shadow-glass: 0 20px 60px rgba(0, 0, 0, 0.45);
            --radius-lg: 24px;
            --radius-md: 18px;
            --radius-sm: 10px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'Inter', 'Roboto', 'SF Mono', 'Courier New', monospace;
            --transition-base: all 0.25s ease;
            --container-max: 1280px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-blue);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .site-container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: 72px 0;
            position: relative;
        }
        .section-alt {
            background-color: var(--bg-secondary);
        }
        .section-label {
            display: inline-block;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 760px;
            margin-bottom: 40px;
            line-height: 1.8;
        }
        .glass-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: var(--shadow-glass);
            transition: var(--transition-base);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 24px 70px rgba(0, 166, 255, 0.18);
        }
        .btn-glow {
            background: linear-gradient(135deg, #00A6FF, #00E0FF);
            color: #fff;
            border: none;
            padding: 13px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            box-shadow: 0 0 24px rgba(0, 166, 255, 0.5);
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
            text-decoration: none;
        }
        .btn-glow:hover {
            box-shadow: 0 0 36px rgba(0, 224, 255, 0.7);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.4);
        }
        .btn-outline-glow {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 13px 30px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition-base);
            display: inline-block;
            text-align: center;
            text-decoration: none;
        }
        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.06);
            transform: translateY(-2px);
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(0, 166, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 166, 255, 0.25);
            text-decoration: none;
        }
        .tag-green {
            background: rgba(43, 255, 136, 0.12);
            color: var(--energy-green);
            border-color: rgba(43, 255, 136, 0.25);
        }
        .tag:hover {
            background: rgba(0, 166, 255, 0.25);
            color: var(--accent-cyan);
        }
        .site-nav {
            position: fixed;
            top: 18px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1050;
            width: calc(100% - 40px);
            max-width: 1180px;
        }
        .nav-dock {
            background: rgba(10, 14, 26, 0.78);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 10px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5);
            transition: var(--transition-base);
        }
        .nav-dock .logo {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-dock .logo i {
            color: var(--accent-cyan);
        }
        .nav-dock .logo:hover {
            color: var(--accent-cyan);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            display: block;
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links li a.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(0, 166, 255, 0.35), rgba(0, 224, 255, 0.25));
            border: 1px solid rgba(0, 224, 255, 0.4);
            box-shadow: 0 0 16px rgba(0, 166, 255, 0.2);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-search-btn {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-secondary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .nav-search-btn:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 224, 255, 0.08);
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
            white-space: nowrap;
        }
        .navbar-toggler-custom {
            display: none;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 18px;
            transition: var(--transition-base);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        @media (max-width: 991px) {
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 12px);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.95);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border: 1px solid rgba(255, 255, 255, 0.1);
                border-radius: 24px;
                padding: 16px;
                flex-direction: column;
                align-items: stretch;
                box-shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 16px;
                text-align: center;
            }
            .navbar-toggler-custom {
                display: flex;
            }
            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }
        @media (max-width: 575px) {
            .site-nav {
                top: 10px;
                width: calc(100% - 20px);
            }
            .nav-dock {
                padding: 8px 14px;
                border-radius: 30px;
            }
            .nav-dock .logo {
                font-size: 18px;
            }
            .nav-cta {
                padding: 6px 12px;
                font-size: 12px;
            }
            .nav-search-btn {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }
            .navbar-toggler-custom {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
        }
        .list-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .list-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 166, 255, 0.45);
            box-shadow: 0 20px 50px rgba(0, 166, 255, 0.12);
        }
        .list-card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .list-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .list-card:hover .list-card-img img {
            transform: scale(1.04);
        }
        .list-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .list-card-title {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-primary);
            text-decoration: none;
            display: block;
        }
        .list-card-title:hover {
            color: var(--accent-cyan);
        }
        .list-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            margin-top: auto;
            font-size: 13px;
            color: var(--text-muted);
        }
        .list-card-meta .date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .read-more {
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
            transition: var(--transition-base);
        }
        .read-more:hover {
            color: #fff;
            gap: 10px;
        }
        .filter-toolbar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            margin-bottom: 32px;
        }
        .filter-toolbar .filter-group {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }
        .filter-toolbar .filter-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-right: 4px;
        }
        .filter-chip {
            padding: 7px 16px;
            border-radius: 24px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
        }
        .filter-chip:hover {
            color: var(--accent-cyan);
            border-color: rgba(0, 224, 255, 0.4);
            background: rgba(0, 224, 255, 0.06);
        }
        .filter-chip.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(0, 166, 255, 0.4), rgba(0, 224, 255, 0.3));
            border-color: rgba(0, 224, 255, 0.5);
            box-shadow: 0 0 14px rgba(0, 166, 255, 0.25);
        }
        .stat-card {
            text-align: center;
            padding: 28px 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: var(--transition-base);
        }
        .stat-card:hover {
            border-color: rgba(0, 166, 255, 0.4);
            transform: translateY(-4px);
        }
        .stat-number {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }
        .stat-trend {
            font-size: 13px;
            margin-top: 6px;
            color: var(--energy-green);
        }
        .featured-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .featured-card:hover {
            border-color: rgba(0, 166, 255, 0.45);
            transform: translateY(-4px);
            box-shadow: 0 20px 50px rgba(0, 166, 255, 0.12);
        }
        .featured-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .featured-card:hover .featured-img img {
            transform: scale(1.04);
        }
        .featured-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .featured-title {
            font-size: 22px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
            color: var(--text-primary);
            text-decoration: none;
        }
        .featured-title:hover {
            color: var(--accent-cyan);
        }
        .featured-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .category-link-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            text-decoration: none;
        }
        .category-link-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 224, 255, 0.12);
        }
        .category-link-card i {
            font-size: 32px;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .category-link-card h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .category-link-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
        }
        .subscribe-cta {
            background: linear-gradient(135deg, rgba(0, 166, 255, 0.12), rgba(0, 224, 255, 0.08));
            border: 1px solid rgba(0, 224, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .subscribe-cta::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 224, 255, 0.2), transparent 70%);
            pointer-events: none;
        }
        .subscribe-cta h3 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .subscribe-cta p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .subscribe-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 520px;
            margin: 0 auto;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 240px;
            padding: 14px 22px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            font-size: 15px;
            outline: none;
            transition: var(--transition-base);
        }
        .subscribe-form input::placeholder {
            color: var(--text-muted);
        }
        .subscribe-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 18px rgba(0, 224, 255, 0.3);
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(0, 166, 255, 0.35);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
        }
        .faq-question i {
            color: var(--accent-cyan);
            font-size: 16px;
            transition: var(--transition-base);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-secondary);
            text-decoration: none;
        }
        .breadcrumb-custom a:hover {
            color: var(--accent-cyan);
        }
        .breadcrumb-custom .separator {
            color: var(--text-muted);
        }
        .breadcrumb-custom .current {
            color: var(--accent-cyan);
        }
        .page-header-area {
            padding-top: 140px;
            padding-bottom: 48px;
            position: relative;
        }
        .page-header-area h1 {
            font-size: 42px;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
        }
        .page-header-area .lead {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
        }
        @media (max-width: 768px) {
            .page-header-area h1 {
                font-size: 30px;
            }
            .page-header-area .lead {
                font-size: 16px;
            }
            .section-title {
                font-size: 26px;
            }
            section {
                padding: 48px 0;
            }
            .list-card-body {
                padding: 16px 18px 18px;
            }
            .featured-body {
                padding: 18px 18px 20px;
            }
            .subscribe-cta {
                padding: 32px 20px;
            }
            .subscribe-cta h3 {
                font-size: 22px;
            }
            .filter-toolbar {
                padding: 12px 14px;
                gap: 8px;
            }
            .stat-number {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .page-header-area h1 {
                font-size: 24px;
            }
            .list-card-title {
                font-size: 17px;
            }
            .featured-title {
                font-size: 18px;
            }
            .filter-chip {
                padding: 5px 12px;
                font-size: 12px;
            }
            .subscribe-form input {
                min-width: 100%;
            }
        }
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 60px 0 32px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }
        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 575px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        body {
            padding-top: 0;
        }
        main {
            min-height: 60vh;
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}