/* roulang page: index */
:root {
            --primary: #1B65D6;
            --primary-dark: #154ea8;
            --primary-light: #3d82e8;
            --accent: #17A34A;
            --amber: #D97706;
            --bg: #F5F7FA;
            --bg-blue: #EFF4FB;
            --text: #0F1E33;
            --text-soft: #41536b;
            --text-muted: #6b7a8f;
            --border: #dbe3ef;
            --card-bg: #ffffff;
            --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
            --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --space-section: 72px;
            --space-card: 24px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }

        .logo a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo a:hover {
            color: var(--text);
        }

        .logo span {
            color: var(--primary);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .nav-main a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }

        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-blue);
        }

        .nav-main a.active {
            color: #fff;
            background: var(--primary);
        }

        .nav-main a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }

        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFF7E6;
            color: var(--amber);
            font-size: 13px;
            font-weight: 700;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #F5D9A8;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .nav-badge:hover {
            background: var(--amber);
            color: #fff;
            border-color: var(--amber);
        }

        .nav-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--amber);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.4); }
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Hero Section */
        .hero {
            position: relative;
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 45%, #1a3d70 100%);
            padding: 64px 0 80px;
            overflow: hidden;
            min-height: 620px;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.35) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(23, 163, 74, 0.2) 0%, rgba(23, 163, 74, 0) 70%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(27, 101, 214, 0.45);
            color: #c3d9ff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(27, 101, 214, 0.6);
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 46px;
            font-weight: 900;
            line-height: 1.25;
            color: #ffffff;
            margin: 0 0 20px;
            letter-spacing: -0.5px;
        }

        .hero h1 .highlight {
            color: #7ab8ff;
            position: relative;
        }

        .hero .hero-desc {
            font-size: 17px;
            line-height: 1.9;
            color: #c5d4e8;
            max-width: 540px;
            margin: 0 0 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            font-size: 16px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(27, 101, 214, 0.35);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 24px rgba(27, 101, 214, 0.5);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

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

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(23, 163, 74, 0.35);
        }

        .btn-accent:hover {
            background: #128a3d;
            color: #fff;
            transform: translateY(-2px);
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat-num {
            font-size: 28px;
            font-weight: 900;
            color: #fff;
        }

        .hero-stat-label {
            font-size: 13px;
            color: #8aa4c8;
        }

        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .hero-visual-main {
            width: 100%;
            max-width: 480px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
            border: 2px solid rgba(255, 255, 255, 0.15);
            aspect-ratio: 4 / 5;
            background: #1a2d48;
            position: relative;
        }

        .hero-visual-main img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .hero-visual-main .visual-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 32px 24px 20px;
            background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,0.8) 100%);
            color: #fff;
        }

        .visual-overlay .overlay-title {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 6px;
        }

        .visual-overlay .overlay-sub {
            font-size: 14px;
            color: #c5d4e8;
        }

        /* Trust Badge Strip */
        .trust-strip {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 20px 0;
        }

        .trust-strip-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .trust-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-soft);
        }

        .trust-item i {
            color: var(--primary);
            font-size: 18px;
        }

        /* Generic Sections */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-blue {
            background: var(--bg-blue);
        }

        .section-dark {
            background: #0f1e33;
            color: #fff;
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 12px;
            letter-spacing: -0.3px;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
            margin: 0;
        }

        .section-dark .section-subtitle {
            color: #b0c1d8;
        }

        /* Matrix Entry Grid */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 18px;
        }

        .matrix-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px 18px;
            text-align: center;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }

        .matrix-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .matrix-item .matrix-icon {
            width: 52px;
            height: 52px;
            background: var(--bg-blue);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            transition: all var(--transition);
        }

        .matrix-item:hover .matrix-icon {
            background: var(--primary);
            color: #fff;
        }

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

        .matrix-item:hover .matrix-name {
            color: var(--primary);
        }

        /* Three Sell Points */
        .sell-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .sell-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .sell-card .sell-icon {
            width: 56px;
            height: 56px;
            background: var(--bg-blue);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .sell-card .sell-title {
            font-size: 19px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
        }

        .sell-card .sell-desc {
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
            margin: 0;
        }

        /* Latest Updates */
        .latest-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .latest-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 18px 22px;
            transition: all var(--transition);
        }

        .latest-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .latest-item .latest-date {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            min-width: 80px;
        }

        .latest-item .latest-text {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            flex: 1;
        }

        .latest-item .latest-tag {
            background: var(--bg-blue);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
        }

        /* Scene Demo */
        .scene-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .scene-text .scene-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
        }

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

        .scene-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
        }

        .scene-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* Featured Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .tag-chip {
            display: inline-block;
            padding: 10px 20px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-soft);
            transition: all var(--transition);
        }

        .tag-chip:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* Data Snapshot */
        .data-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
        }

        .data-card:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-3px);
        }

        .data-card .data-num {
            font-size: 36px;
            font-weight: 900;
            color: #7ab8ff;
            margin-bottom: 6px;
        }

        .data-card .data-label {
            font-size: 14px;
            color: #b0c1d8;
        }

        /* Social Proof / Testimonials */
        .proof-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .proof-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 26px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .proof-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .proof-card .proof-text {
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .proof-card .proof-author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
        }

        .proof-card .proof-avatar {
            width: 36px;
            height: 36px;
            background: var(--bg-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary);
        }

        /* News Center */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .news-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .news-card .news-image {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #e8edf5;
        }

        .news-card .news-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .news-card .news-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-date {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-card .news-title {
            font-size: 17px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .news-card .news-excerpt {
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.8;
            margin-bottom: 16px;
            flex: 1;
        }

        .news-card .news-link {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-card .news-link:hover {
            color: var(--primary-dark);
        }

        /* Update Log */
        .update-timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 28px;
        }

        .update-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--border);
        }

        .update-item {
            position: relative;
            padding: 0 0 28px;
        }

        .update-item:last-child {
            padding-bottom: 0;
        }

        .update-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            border: 2px solid #fff;
            box-shadow: 0 0 0 3px rgba(27, 101, 214, 0.3);
        }

        .update-item .update-version {
            font-size: 14px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .update-item .update-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .update-item .update-desc {
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.7;
        }

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

        .platform-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .platform-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .platform-card .platform-icon {
            width: 64px;
            height: 64px;
            background: var(--bg-blue);
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: var(--primary);
            margin: 0 auto 16px;
        }

        .platform-card .platform-name {
            font-size: 17px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 8px;
        }

        .platform-card .platform-desc {
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            text-align: left;
            transition: all var(--transition);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: var(--bg-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--primary);
            transition: transform var(--transition);
        }

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

        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
            border-top: 1px solid var(--border);
        }

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

        /* Brand Intro */
        .brand-intro {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 36px 32px;
            box-shadow: var(--shadow-sm);
        }

        .brand-intro .brand-title {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
        }

        .brand-intro .brand-text {
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.9;
            margin: 0;
        }

        /* Guarantee Strip */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            color: #c5d4e8;
            font-size: 14px;
            font-weight: 600;
        }

        .guarantee-item i {
            color: #17A34A;
            font-size: 18px;
            flex-shrink: 0;
        }

        /* Bottom CTA */
        .bottom-cta {
            background: linear-gradient(135deg, var(--primary) 0%, #0f3d8c 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .bottom-cta::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
            pointer-events: none;
        }

        .bottom-cta .cta-title {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .bottom-cta .cta-sub {
            font-size: 16px;
            color: #c3d9ff;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }

        /* Footer */
        .site-footer {
            background: #0a1628;
            color: #b0c1d8;
            padding: 56px 0 0;
            font-size: 14px;
            line-height: 1.8;
        }

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

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand .footer-logo span {
            color: #7ab8ff;
        }

        .footer-brand p {
            color: #b0c1d8;
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: #b0c1d8;
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: #7ab8ff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #7a8aa3;
        }

        .footer-bottom a {
            color: #7a8aa3;
            transition: color var(--transition);
        }

        .footer-bottom a:hover {
            color: #7ab8ff;
        }

        /* Fixed Bottom CTA */
        .fixed-cta {
            position: fixed;
            bottom: 16px;
            right: 16px;
            z-index: 200;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: 0 16px 40px rgba(15, 30, 51, 0.18);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 16px;
            max-width: 380px;
            transition: all var(--transition);
        }

        .fixed-cta.hidden {
            display: none;
        }

        .fixed-cta .fixed-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
        }

        .fixed-cta .btn-close-fixed {
            background: none;
            border: none;
            font-size: 18px;
            color: var(--text-muted);
            cursor: pointer;
            padding: 4px 8px;
            transition: color var(--transition);
        }

        .fixed-cta .btn-close-fixed:hover {
            color: var(--text);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }

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

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

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

            .hero-visual-main {
                max-width: 360px;
                margin: 0 auto;
            }

            .matrix-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .sell-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .proof-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .news-grid {
                grid-template-columns: 1fr;
            }

            .platform-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .data-bar {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 0 8px;
                gap: 4px;
            }

            .nav-main.open {
                display: flex;
            }

            .nav-main a {
                padding: 12px 16px;
                text-align: center;
            }

            .nav-badge {
                justify-content: center;
                margin-top: 6px;
            }

            .header-top {
                flex-wrap: wrap;
            }

            .hero {
                padding: 48px 0 56px;
                min-height: auto;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero .hero-desc {
                font-size: 15px;
            }

            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 26px;
            }

            .matrix-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .sell-grid {
                grid-template-columns: 1fr;
            }

            .proof-grid {
                grid-template-columns: 1fr;
            }

            .platform-grid {
                grid-template-columns: 1fr;
            }

            .data-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 24px;
            }

            .guarantee-grid {
                grid-template-columns: 1fr;
            }

            .bottom-cta {
                padding: 36px 24px;
            }

            .fixed-cta {
                left: 16px;
                right: 16px;
                bottom: 12px;
                max-width: 100%;
                border-radius: var(--radius-sm);
                padding: 12px 16px;
                gap: 10px;
            }

            .fixed-cta .btn {
                padding: 10px 16px;
                font-size: 14px;
                white-space: nowrap;
            }

            .trust-strip-inner {
                justify-content: center;
            }

            .trust-item {
                font-size: 13px;
            }

            .latest-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 14px 16px;
            }

            .latest-item .latest-date {
                min-width: auto;
            }

            .news-card .news-body {
                padding: 16px 18px 18px;
            }

            .update-timeline {
                padding-left: 22px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero h1 {
                font-size: 26px;
            }

            .hero .hero-desc {
                font-size: 14px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-stats {
                gap: 16px;
            }

            .hero-stat-num {
                font-size: 22px;
            }

            .matrix-grid {
                gap: 10px;
            }

            .matrix-item {
                padding: 18px 12px;
            }

            .matrix-item .matrix-icon {
                width: 44px;
                height: 44px;
                font-size: 18px;
            }

            .matrix-item .matrix-name {
                font-size: 13px;
            }

            .section-title {
                font-size: 22px;
            }

            .section-subtitle {
                font-size: 14px;
            }

            .data-card {
                padding: 20px 16px;
            }

            .data-card .data-num {
                font-size: 28px;
            }

            .brand-intro {
                padding: 24px 20px;
            }

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

            .faq-answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .fixed-cta {
                flex-wrap: wrap;
                justify-content: center;
                text-align: center;
            }

            .fixed-cta .fixed-text {
                flex: 1;
                min-width: 100%;
                text-align: center;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1B65D6;
            --primary-dark: #154ea8;
            --primary-light: #3d82e8;
            --accent: #17A34A;
            --amber: #D97706;
            --bg: #F5F7FA;
            --bg-blue: #EFF4FB;
            --text: #0F1E33;
            --text-soft: #41536b;
            --text-muted: #6b7a8f;
            --border: #dbe3ef;
            --card-bg: #ffffff;
            --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
            --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --space-section: 72px;
            --space-card: 24px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            --transition: 0.22s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }
        .logo a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: var(--text);
        }
        .logo span {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-blue);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
        }
        .nav-main a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFF7E6;
            color: var(--amber);
            font-size: 13px;
            font-weight: 700;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #F5D9A8;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .nav-badge:hover {
            background: var(--amber);
            color: #fff;
            border-color: var(--amber);
        }
        .nav-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--amber);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.5);
            }
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Breadcrumb + Category Hero */
        .category-hero {
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 55%, #1a3d70 100%);
            padding: 40px 0 48px;
            position: relative;
            overflow: hidden;
            color: #fff;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.35) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(23, 163, 74, 0.18) 0%, rgba(23, 163, 74, 0) 70%);
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.4);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }
        .category-hero-content {
            position: relative;
            z-index: 1;
            max-width: 780px;
        }
        .category-hero-content h1 {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            margin: 0 0 16px;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .category-hero-content .category-intro {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin: 0;
            max-width: 720px;
        }

        /* Sub Topics Chips */
        .sub-topics {
            padding: 24px 0 8px;
            background: var(--bg);
        }
        .sub-topics .container {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .sub-topics-label {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-soft);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .topic-chips {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            overflow-x: auto;
            padding-bottom: 4px;
            -webkit-overflow-scrolling: touch;
        }
        .topic-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--card-bg);
            color: var(--text-soft);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 18px;
            border-radius: var(--radius-pill);
            border: 1px solid var(--border);
            white-space: nowrap;
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .topic-chip:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .topic-chip i {
            font-size: 13px;
            opacity: 0.8;
        }

        /* Section General */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-heading {
            margin-bottom: 32px;
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 8px;
            letter-spacing: 0.3px;
        }
        .section-heading p {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
            max-width: 640px;
        }
        .section-heading .heading-tag {
            display: inline-block;
            background: var(--bg-blue);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-heading .heading-tag.accent {
            background: #E8F7EE;
            color: var(--accent);
        }

        /* Data Cards List */
        .data-list {
            padding: 48px 0 var(--space-section);
        }
        .data-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .data-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .data-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .data-card-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--bg-blue);
        }
        .data-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .data-card:hover .data-card-media img {
            transform: scale(1.04);
        }
        .data-card-media .media-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(15, 30, 51, 0.75);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            backdrop-filter: blur(5px);
            letter-spacing: 0.5px;
        }
        .data-card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .data-card-body h3 {
            font-size: 19px;
            font-weight: 700;
            line-height: 1.5;
            margin: 0 0 10px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 57px;
        }
        .data-card-body h3 a {
            color: var(--text);
            transition: color var(--transition);
        }
        .data-card-body h3 a:hover {
            color: var(--primary);
        }
        .data-card-body .card-summary {
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .data-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            margin-top: auto;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .data-card-footer .card-date {
            font-size: 13px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .data-card-footer .card-date i {
            font-size: 12px;
            opacity: 0.7;
        }
        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .read-more:hover {
            color: var(--primary-dark);
            gap: 10px;
        }
        .read-more i {
            font-size: 13px;
        }

        /* Stats Strip */
        .stats-strip {
            background: #fff;
            padding: 40px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .stats-strip .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 20px 16px;
            background: var(--bg-blue);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }
        .stat-item .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: 0.5px;
        }
        .stat-item .stat-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-soft);
            margin-top: 6px;
        }
        .stat-item .stat-detail {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* Topic Tags */
        .topic-tags {
            padding: 48px 0;
            background: var(--bg);
        }
        .topic-tags .container {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .topic-tags-label {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }
        .tag-cloud {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-soft);
            background: var(--card-bg);
            border: 1px solid var(--border);
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .tag .tag-count {
            font-size: 11px;
            background: var(--bg-blue);
            color: var(--primary);
            border-radius: var(--radius-pill);
            padding: 2px 8px;
            font-weight: 700;
        }
        .tag:hover .tag-count {
            background: rgba(255, 255, 255, 0.25);
            color: #fff;
        }

        /* FAQ */
        .faq-section {
            padding: var(--space-section) 0;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .faq-item details {
            width: 100%;
        }
        .faq-item summary {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            transition: all var(--transition);
            position: relative;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            width: 32px;
            height: 32px;
            background: var(--bg-blue);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .faq-item summary .faq-chevron {
            margin-left: auto;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item details[open] summary .faq-chevron {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item summary:hover {
            background: var(--bg-blue);
        }
        .faq-item .faq-answer {
            padding: 0 22px 22px 68px;
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
        }
        .faq-item .faq-answer p {
            margin: 0;
        }

        /* Related Category Cards */
        .related-categories {
            padding: var(--space-section) 0;
            background: var(--bg);
        }
        .related-card-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }
        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .related-card .related-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-blue);
            color: var(--primary);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            transition: all var(--transition);
        }
        .related-card:hover .related-icon {
            background: var(--primary);
            color: #fff;
        }
        .related-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }
        .related-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* Bottom CTA */
        .bottom-cta {
            padding: 56px 0;
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 50%, #1a3d70 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
            color: #fff;
        }
        .bottom-cta::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -40px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.3) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }
        .bottom-cta .container {
            position: relative;
            z-index: 1;
        }
        .bottom-cta h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin: 0 0 12px;
            letter-spacing: 0.5px;
        }
        .bottom-cta p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-md);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 101, 214, 0.35);
        }
        .btn-primary:focus {
            outline: 3px solid rgba(27, 101, 214, 0.5);
            outline-offset: 3px;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            border: 2px solid rgba(255, 255, 255, 0.4);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            margin-left: 12px;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #0B1B33;
            color: rgba(255, 255, 255, 0.75);
            padding: 52px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-brand .footer-logo i {
            color: var(--primary-light);
            margin-right: 8px;
        }
        .footer-brand .footer-logo span {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            margin: 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .data-card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .stats-strip .container {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .related-card-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .category-hero-content h1 {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 48px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 0 12px;
                border-top: 1px solid var(--border);
                margin-top: 4px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                text-align: center;
                padding: 12px 16px;
                width: 100%;
            }
            .nav-badge {
                justify-content: center;
                margin-top: 6px;
            }
            .category-hero {
                padding: 28px 0 36px;
            }
            .category-hero-content h1 {
                font-size: 24px;
            }
            .category-hero-content .category-intro {
                font-size: 15px;
            }
            .data-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .data-card-body {
                padding: 18px 18px 20px;
            }
            .data-card-body h3 {
                font-size: 17px;
                min-height: auto;
            }
            .stats-strip .container {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 24px;
            }
            .related-card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .bottom-cta h2 {
                font-size: 22px;
            }
            .btn-outline-light {
                margin-left: 0;
                margin-top: 12px;
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 18px 52px;
                font-size: 14px;
            }
            .section-heading h2 {
                font-size: 22px;
            }
            .sub-topics {
                padding: 16px 0 4px;
            }
            .topic-chip {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .stats-strip .container {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .related-card-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .category-hero-content h1 {
                font-size: 21px;
            }
            .breadcrumb {
                font-size: 12px;
                gap: 4px;
            }
            .data-card-footer {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .tag-cloud {
                gap: 6px;
            }
            .tag {
                padding: 6px 12px;
                font-size: 12px;
            }
            .footer-grid {
                gap: 20px;
            }
            .btn-primary {
                width: 100%;
                justify-content: center;
                padding: 12px 24px;
                font-size: 15px;
            }
            .btn-outline-light {
                width: 100%;
                justify-content: center;
                padding: 12px 24px;
                font-size: 15px;
            }
            .bottom-cta h2 {
                font-size: 20px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1B65D6;
            --primary-dark: #154ea8;
            --primary-light: #3d82e8;
            --accent: #17A34A;
            --amber: #D97706;
            --bg: #F5F7FA;
            --bg-blue: #EFF4FB;
            --text: #0F1E33;
            --text-soft: #41536b;
            --text-muted: #6b7a8f;
            --border: #dbe3ef;
            --card-bg: #ffffff;
            --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
            --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --space-section: 72px;
            --space-card: 24px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }
        .logo a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: var(--text);
        }
        .logo span {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-blue);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
        }
        .nav-main a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFF7E6;
            color: var(--amber);
            font-size: 13px;
            font-weight: 700;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #F5D9A8;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .nav-badge:hover {
            background: var(--amber);
            color: #fff;
            border-color: var(--amber);
        }
        .nav-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--amber);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--bg-blue);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-bar a {
            color: var(--text-soft);
            font-weight: 500;
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .separator {
            margin: 0 8px;
            color: var(--text-muted);
        }
        .breadcrumb-bar .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Category Hero */
        .cat-hero {
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 45%, #1a3d70 100%);
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.3) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(23, 163, 74, 0.18) 0%, rgba(23, 163, 74, 0) 70%);
            pointer-events: none;
        }
        .cat-hero .container {
            position: relative;
            z-index: 1;
        }
        .cat-hero h1 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            color: #fff;
            margin: 0 0 12px;
            letter-spacing: 0.5px;
        }
        .cat-hero .cat-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 680px;
            line-height: 1.9;
            margin: 0;
        }
        .cat-hero .cat-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .cat-hero .cat-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            background: rgba(255, 255, 255, 0.08);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .cat-hero .cat-meta i {
            font-size: 12px;
            color: var(--primary-light);
        }

        /* Section common */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            gap: 20px;
            flex-wrap: wrap;
        }
        .section-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            margin: 0;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            margin: 6px 0 0;
        }
        .section-link {
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
        }
        .section-link:hover {
            color: var(--primary-dark);
        }

        /* Chips */
        .chips-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .chip-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            color: var(--text-soft);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .chip-item i {
            font-size: 13px;
            color: var(--primary);
        }
        .chip-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--bg-blue);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .chip-item.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .chip-item.active i {
            color: #fff;
        }

        /* Article Cards */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 24px;
        }
        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .article-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .article-card .card-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--primary);
            background: var(--bg-blue);
            border-radius: var(--radius-pill);
            padding: 4px 12px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .article-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .article-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            gap: 10px;
        }
        .article-card .card-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-card .card-date i {
            font-size: 12px;
            color: var(--primary-light);
        }
        .article-card .btn-read {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .article-card .btn-read:hover {
            background: var(--bg-blue);
            color: var(--primary-dark);
            gap: 10px;
        }

        /* Stats Bar */
        .stats-bar {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .stat-item {
            text-align: center;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: var(--bg-blue);
        }
        .stat-item .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-soft);
            font-weight: 500;
        }

        /* Tags Section */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            color: var(--text-soft);
            transition: all var(--transition);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .tag-item .tag-count {
            font-size: 11px;
            font-weight: 700;
            background: var(--bg-blue);
            color: var(--primary);
            border-radius: var(--radius-pill);
            padding: 2px 8px;
        }
        .tag-item:hover .tag-count {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-item.open {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 18px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            user-select: none;
            transition: all var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-blue);
        }
        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            background: var(--bg-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            flex-shrink: 0;
            font-weight: 800;
        }
        .faq-question .faq-chevron {
            margin-left: auto;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-chevron {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 20px;
        }
        .faq-answer p {
            margin: 0;
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.85;
        }

        /* Related Categories */
        .rel-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
        }
        .rel-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 20px;
            text-align: center;
            transition: all var(--transition);
            cursor: pointer;
        }
        .rel-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .rel-card .rel-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-blue);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin: 0 auto 12px;
            transition: all var(--transition);
        }
        .rel-card:hover .rel-icon {
            background: var(--primary);
            color: #fff;
        }
        .rel-card .rel-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }
        .rel-card .rel-count {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* CTA Section */
        .cta-box {
            background: linear-gradient(135deg, #0b1b33 0%, #1a3d70 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.35) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }
        .cta-box h3 {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin: 0 0 10px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin: 0 0 24px;
            position: relative;
            z-index: 1;
        }
        .btn {
            display: inline-block;
            padding: 14px 32px;
            font-size: 16px;
            font-weight: 700;
            border-radius: 12px;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            text-align: center;
            letter-spacing: 0.3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(27, 101, 214, 0.35);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-primary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 10px 20px;
            font-size: 14px;
        }
        .btn-outline-primary:hover {
            background: var(--bg-blue);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #0b1b33;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin: 12px 0 0;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo i {
            font-size: 24px;
            color: var(--primary-light);
        }
        .footer-logo span {
            color: var(--primary-light);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
        }
        .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: rgba(255, 255, 255, 0.65);
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .article-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }
        @media (max-width: 768px) {
            :root {
                --space-section: 48px;
                --space-card: 18px;
            }
            .header-top {
                flex-wrap: nowrap;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-main {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                padding: 12px 0;
                gap: 4px;
                border-top: 1px solid var(--border);
                margin-top: 12px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 16px;
                text-align: left;
                width: 100%;
            }
            .nav-badge {
                align-self: flex-start;
                margin-top: 4px;
            }
            .cat-hero {
                padding: 32px 0 40px;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .cat-hero .cat-desc {
                font-size: 15px;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .rel-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-box {
                padding: 32px 20px;
            }
            .cta-box h3 {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            :root {
                --space-section: 40px;
            }
            .container {
                padding: 0 16px;
            }
            .logo {
                font-size: 18px;
            }
            .logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }
            .cat-hero h1 {
                font-size: 22px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .rel-grid {
                grid-template-columns: 1fr;
            }
            .article-card .card-img {
                height: 160px;
            }
            .article-card .card-body {
                padding: 16px 18px 18px;
            }
            .article-card .card-title {
                font-size: 16px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 16px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 15px;
            }
        }

        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Utility */
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .text-center { text-align: center; }

/* roulang page: category1 */
:root {
            --primary: #1B65D6;
            --primary-dark: #154ea8;
            --primary-light: #3d82e8;
            --accent: #17A34A;
            --amber: #D97706;
            --bg: #F5F7FA;
            --bg-blue: #EFF4FB;
            --text: #0F1E33;
            --text-soft: #41536b;
            --text-muted: #6b7a8f;
            --border: #dbe3ef;
            --card-bg: #ffffff;
            --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
            --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --space-section: 72px;
            --space-card: 24px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            --transition: 0.22s ease;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }

        .logo a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo a:hover {
            color: var(--text);
        }

        .logo span {
            color: var(--primary);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .nav-main a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }

        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-blue);
        }

        .nav-main a.active {
            color: #fff;
            background: var(--primary);
        }

        .nav-main a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }

        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFF7E6;
            color: var(--amber);
            font-size: 13px;
            font-weight: 700;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #F5D9A8;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .nav-badge:hover {
            background: var(--amber);
            color: #fff;
            border-color: var(--amber);
        }

        .nav-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--amber);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Page Hero Banner (Category) */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 45%, #1a3d70 100%);
            padding: 48px 0 56px;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.3) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 20%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(23, 163, 74, 0.15) 0%, rgba(23, 163, 74, 0) 70%);
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb .separator {
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        .page-banner h1 {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }

        .page-banner .banner-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 680px;
            line-height: 1.9;
            margin: 0;
        }

        /* Section Common */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-bg-blue {
            background: var(--bg-blue);
        }

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

        .section-header h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 10px;
            letter-spacing: 0.3px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-soft);
            margin: 0;
            max-width: 620px;
            line-height: 1.8;
        }

        /* Chips */
        .chips-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            background: #fff;
            color: var(--text-soft);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .chip:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .chip i {
            font-size: 13px;
            opacity: 0.8;
        }

        /* List Cards */
        .list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .list-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .list-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .list-card .card-img {
            height: 220px;
            overflow: hidden;
            flex-shrink: 0;
            position: relative;
        }

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

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

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

        .list-card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 700;
            background: var(--bg-blue);
            color: var(--primary);
            margin-bottom: 12px;
            align-self: flex-start;
        }

        .list-card .card-tag.tag-hot {
            background: #FFF7E6;
            color: var(--amber);
        }

        .list-card .card-tag.tag-green {
            background: #EFFAF1;
            color: var(--accent);
        }

        .list-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

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

        .list-card .card-summary {
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.75;
            margin: 0 0 16px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .list-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
        }

        .list-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .list-card .read-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            align-self: flex-start;
            margin-top: 12px;
        }

        .list-card .read-btn:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(27, 101, 214, 0.3);
        }

        /* Data Strip */
        .data-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .data-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .data-item .data-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: 0.5px;
        }

        .data-item .data-number.green {
            color: var(--accent);
        }

        .data-item .data-number.amber {
            color: var(--amber);
        }

        .data-item .data-label {
            font-size: 15px;
            color: var(--text-soft);
            font-weight: 600;
        }

        /* Tag Cloud / Topic Cards */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }

        .topic-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .topic-card i {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 14px;
            display: inline-block;
        }

        .topic-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
        }

        .topic-card p {
            font-size: 14px;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 26px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }

        .faq-item .faq-question .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--bg-blue);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-item .faq-answer {
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
            margin: 14px 0 0 44px;
            display: none;
        }

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

        .faq-item.active .faq-question .faq-icon {
            background: var(--primary);
            color: #fff;
        }

        /* Ticker Strip */
        .ticker-strip {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            flex-wrap: wrap;
        }

        .ticker-strip .ticker-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            white-space: nowrap;
        }

        .ticker-strip .ticker-items {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            flex: 1;
        }

        .ticker-strip .ticker-item {
            font-size: 14px;
            color: var(--text-soft);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .ticker-strip .ticker-item i {
            color: var(--primary);
            font-size: 12px;
        }

        /* Related Category Cards */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .related-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .related-card i {
            font-size: 26px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .related-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }

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

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

        /* CTA Bar */
        .cta-bar {
            background: linear-gradient(135deg, #0b1b33 0%, #1a3d70 100%);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-lg);
        }

        .cta-bar .cta-text h2 {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            margin: 0 0 8px;
        }

        .cta-bar .cta-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            margin: 0;
        }

        .cta-bar .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: #fff;
            color: var(--primary);
            border-radius: 12px;
            font-size: 16px;
            font-weight: 700;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .cta-bar .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        }

        /* Footer */
        .site-footer {
            background: #0B1B33;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

        .footer-brand .footer-logo span {
            color: var(--primary-light);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            margin: 0;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --space-section: 56px;
            }
            .list-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --space-section: 44px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-main {
                display: none;
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                padding: 12px 0;
                gap: 4px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 16px;
                text-align: left;
            }
            .nav-main .nav-badge {
                align-self: flex-start;
                margin-top: 4px;
            }
            .header-top {
                flex-wrap: wrap;
            }
            .page-banner {
                padding: 36px 0 44px;
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner .banner-sub {
                font-size: 15px;
            }
            .list-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .list-card .card-img {
                height: 180px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .data-item {
                padding: 20px 16px;
            }
            .data-item .data-number {
                font-size: 32px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .cta-bar {
                padding: 28px 24px;
                flex-direction: column;
                text-align: center;
                align-items: stretch;
            }
            .cta-bar .btn-primary {
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .faq-item {
                padding: 18px 20px;
            }
            .faq-item .faq-answer {
                margin-left: 0;
                margin-top: 12px;
            }
            .ticker-strip {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .data-strip {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .breadcrumb {
                font-size: 13px;
                gap: 4px;
            }
            .list-card .card-body {
                padding: 18px 18px 20px;
            }
            .list-card h3 {
                font-size: 18px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #1B65D6;
            --primary-dark: #154ea8;
            --primary-light: #3d82e8;
            --accent: #17A34A;
            --amber: #D97706;
            --bg: #F5F7FA;
            --bg-blue: #EFF4FB;
            --text: #0F1E33;
            --text-soft: #41536b;
            --text-muted: #6b7a8f;
            --border: #dbe3ef;
            --card-bg: #ffffff;
            --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
            --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --space-section: 72px;
            --space-card: 24px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            --transition: 0.22s ease;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }
        .logo a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: var(--text);
        }
        .logo span {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-blue);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
        }
        .nav-main a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFF7E6;
            color: var(--amber);
            font-size: 13px;
            font-weight: 700;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #F5D9A8;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .nav-badge:hover {
            background: var(--amber);
            color: #fff;
            border-color: var(--amber);
        }
        .nav-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--amber);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: var(--text-muted);
            padding: 18px 0 6px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-soft);
            font-weight: 600;
        }
        .category-hero {
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 50%, #1a3d70 100%);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            color: #fff;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 40px;
            margin: 8px 0 32px;
            position: relative;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            top: -100px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(27, 101, 214, 0.4) 0%, rgba(27, 101, 214, 0) 70%);
            pointer-events: none;
        }
        .category-hero .hero-text {
            flex: 1;
            min-width: 280px;
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-text h1 {
            font-size: 36px;
            font-weight: 800;
            margin: 0 0 14px;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .category-hero .hero-text p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin: 0;
            max-width: 620px;
        }
        .category-hero .hero-image {
            flex: 0 0 auto;
            width: 260px;
            height: 180px;
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
            z-index: 2;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
        }
        .category-hero .hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .section {
            padding: 32px 0;
        }
        .section-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 8px;
            letter-spacing: 0.3px;
        }
        .section-sub {
            font-size: 15px;
            color: var(--text-muted);
            margin: 0 0 24px;
        }
        .chip-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            color: var(--text-soft);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            cursor: pointer;
        }
        .chip:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }
        .chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .post-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .post-card .card-thumb {
            height: 170px;
            overflow: hidden;
            position: relative;
        }
        .post-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .post-card:hover .card-thumb img {
            transform: scale(1.04);
        }
        .post-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            margin: 0 0 10px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .card-body p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-soft);
            margin: 0 0 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: auto;
        }
        .post-card .card-meta .tag {
            background: var(--bg-blue);
            color: var(--primary);
            border-radius: var(--radius-pill);
            padding: 3px 10px;
            font-weight: 600;
            font-size: 12px;
        }
        .post-card .read-more {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition);
        }
        .post-card .read-more:hover {
            color: var(--primary-dark);
        }
        .stats-strip {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 28px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            box-shadow: var(--shadow-sm);
        }
        .stats-strip .stat-item {
            text-align: center;
        }
        .stats-strip .stat-item .stat-num {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stats-strip .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .topic-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .topic-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .topic-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .topic-card .topic-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 12px;
        }
        .topic-card .topic-icon.blue {
            background: var(--bg-blue);
            color: var(--primary);
        }
        .topic-card .topic-icon.green {
            background: rgba(23, 163, 74, 0.12);
            color: var(--accent);
        }
        .topic-card .topic-icon.amber {
            background: rgba(217, 119, 6, 0.12);
            color: var(--amber);
        }
        .topic-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--text);
        }
        .topic-card p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            font-weight: 700;
            font-size: 16px;
            color: var(--text);
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--bg-blue);
        }
        .faq-item .faq-question .faq-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-blue);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .faq-item .faq-question .faq-toggle {
            margin-left: auto;
            color: var(--text-muted);
            font-size: 14px;
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px 60px;
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .related-cats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 14px;
        }
        .related-cat {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 15px;
            color: var(--text);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-cat:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .related-cat .rc-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--bg-blue);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }
        .news-ticker {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .news-ticker .ticker-label {
            background: var(--amber);
            color: #fff;
            border-radius: var(--radius-pill);
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 700;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .news-ticker .ticker-content {
            font-size: 14px;
            color: var(--text-soft);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .cta-bar {
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 50%, #1a3d70 100%);
            border-radius: var(--radius-md);
            padding: 28px 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            color: #fff;
        }
        .cta-bar .cta-text {
            flex: 1;
            min-width: 240px;
        }
        .cta-bar .cta-text h3 {
            font-size: 22px;
            font-weight: 800;
            margin: 0 0 6px;
        }
        .cta-bar .cta-text p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            margin: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 15px;
            padding: 11px 24px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(27, 101, 214, 0.35);
        }
        .btn-primary:focus {
            outline: 3px solid rgba(27, 101, 214, 0.25);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--bg-blue);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        .btn-outline:focus {
            outline: 3px solid rgba(27, 101, 214, 0.2);
            outline-offset: 2px;
        }
        .btn-light {
            background: #fff;
            color: var(--text);
        }
        .btn-light:hover {
            background: var(--bg-blue);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .site-footer {
            background: #0b1b33;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand .footer-logo i {
            color: var(--primary-light);
            font-size: 24px;
        }
        .footer-brand .footer-logo span {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            padding-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-cats {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero {
                padding: 32px 28px;
                gap: 28px;
            }
            .category-hero .hero-text h1 {
                font-size: 30px;
            }
            .category-hero .hero-image {
                width: 200px;
                height: 140px;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: #fff;
                border-radius: var(--radius-md);
                padding: 12px;
                box-shadow: var(--shadow-md);
                margin-top: 8px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                text-align: left;
                padding: 12px 14px;
                border-radius: 8px;
            }
            .nav-badge {
                margin-top: 4px;
                justify-content: center;
            }
            .header-top {
                padding: 10px 0;
            }
            .category-hero {
                flex-direction: column;
                align-items: stretch;
                padding: 24px;
            }
            .category-hero .hero-image {
                width: 100%;
                height: 180px;
            }
            .category-hero .hero-text h1 {
                font-size: 26px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .topic-cards {
                grid-template-columns: 1fr;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                padding: 16px;
            }
            .related-cats {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 20px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-bar {
                padding: 22px;
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
            .cta-bar .btn {
                justify-content: center;
            }
            .breadcrumb {
                font-size: 13px;
                padding: 12px 0 4px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stats-strip .stat-item .stat-num {
                font-size: 24px;
            }
            .card-grid {
                gap: 14px;
            }
            .post-card .card-thumb {
                height: 150px;
            }
            .category-hero .hero-text h1 {
                font-size: 22px;
            }
            .category-hero .hero-text p {
                font-size: 15px;
            }
            .news-ticker {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .news-ticker .ticker-content {
                white-space: normal;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px 16px;
            }
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
        }

/* roulang page: category4 */
:root {
        --primary: #1B65D6;
        --primary-dark: #154ea8;
        --primary-light: #3d82e8;
        --accent: #17A34A;
        --amber: #D97706;
        --bg: #F5F7FA;
        --bg-blue: #EFF4FB;
        --text: #0F1E33;
        --text-soft: #41536b;
        --text-muted: #6b7a8f;
        --border: #dbe3ef;
        --card-bg: #ffffff;
        --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
        --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
        --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
        --radius-sm: 10px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --radius-pill: 999px;
        --space-section: 72px;
        --space-card: 24px;
        --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
        --transition: 0.22s ease;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.8;
        color: var(--text);
        background-color: var(--bg);
        margin: 0;
        padding: 0;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
    }

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

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

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

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

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }

    /* Header / Navigation */
    .site-header {
        background: #fff;
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
        box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
    }

    .header-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 0;
        gap: 20px;
        flex-wrap: wrap;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 22px;
        font-weight: 800;
        color: var(--text);
        letter-spacing: 0.5px;
        white-space: nowrap;
    }

    .logo .logo-icon {
        width: 40px;
        height: 40px;
        background: var(--primary);
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 20px;
        flex-shrink: 0;
    }

    .logo a {
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .logo a:hover {
        color: var(--text);
    }

    .logo span {
        color: var(--primary);
    }

    .nav-main {
        display: flex;
        align-items: center;
        gap: 6px;
        flex-wrap: wrap;
    }

    .nav-main a {
        display: inline-block;
        padding: 10px 16px;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-soft);
        border-radius: var(--radius-sm);
        transition: all var(--transition);
        position: relative;
    }

    .nav-main a:hover {
        color: var(--primary);
        background: var(--bg-blue);
    }

    .nav-main a.active {
        color: #fff;
        background: var(--primary);
    }

    .nav-main a.active:hover {
        color: #fff;
        background: var(--primary-dark);
    }

    .nav-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: #FFF7E6;
        color: var(--amber);
        font-size: 13px;
        font-weight: 700;
        padding: 8px 16px;
        border-radius: var(--radius-pill);
        border: 1px solid #F5D9A8;
        white-space: nowrap;
        transition: all var(--transition);
    }

    .nav-badge:hover {
        background: var(--amber);
        color: #fff;
        border-color: var(--amber);
    }

    .nav-badge .badge-dot {
        width: 6px;
        height: 6px;
        background: var(--amber);
        border-radius: 50%;
        animation: pulse-dot 1.6s infinite;
    }

    @keyframes pulse-dot {
        0%, 100% { opacity: 1; transform: scale(1); }
        50% { opacity: 0.5; transform: scale(1.6); }
    }

    .nav-toggle {
        display: none;
        background: none;
        border: 1px solid var(--border);
        border-radius: 10px;
        width: 44px;
        height: 44px;
        cursor: pointer;
        font-size: 20px;
        color: var(--text);
        align-items: center;
        justify-content: center;
        transition: all var(--transition);
    }

    .nav-toggle:hover {
        background: var(--bg-blue);
        border-color: var(--primary);
        color: var(--primary);
    }

    /* Breadcrumb */
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 12px;
        flex-wrap: wrap;
    }

    .breadcrumb a {
        color: rgba(255, 255, 255, 0.8);
        font-weight: 500;
        transition: color var(--transition);
    }

    .breadcrumb a:hover {
        color: #fff;
    }

    .breadcrumb .separator {
        font-size: 12px;
        opacity: 0.5;
    }

    .breadcrumb .current {
        color: #fff;
        font-weight: 600;
        background: rgba(255, 255, 255, 0.15);
        padding: 2px 12px;
        border-radius: var(--radius-pill);
    }

    /* Page Hero Banner */
    .page-hero {
        position: relative;
        background: linear-gradient(135deg, #0b1b33 0%, #102a54 50%, #143a6e 100%);
        padding: 48px 0 56px;
        overflow: hidden;
        min-height: 320px;
        display: flex;
        align-items: center;
    }

    .page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/2587984b1a50390d.webp') center/cover no-repeat;
        opacity: 0.28;
        pointer-events: none;
    }

    .page-hero::after {
        content: '';
        position: absolute;
        top: -100px;
        right: -60px;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(27, 101, 214, 0.35) 0%, rgba(27, 101, 214, 0) 70%);
        pointer-events: none;
    }

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

    .page-hero h1 {
        color: #fff;
        font-size: 38px;
        font-weight: 800;
        line-height: 1.3;
        margin: 0 0 14px;
        letter-spacing: 0.5px;
        max-width: 800px;
    }

    .page-hero .hero-desc {
        color: rgba(255, 255, 255, 0.82);
        font-size: 17px;
        line-height: 1.9;
        max-width: 680px;
        margin: 0;
    }

    /* Section common */
    .section {
        padding: var(--space-section) 0;
    }

    .section-alt {
        background: #fff;
    }

    .section-title {
        font-size: 28px;
        font-weight: 800;
        color: var(--text);
        margin: 0 0 12px;
        letter-spacing: 0.3px;
    }

    .section-subtitle {
        font-size: 16px;
        color: var(--text-soft);
        margin: 0 0 36px;
        max-width: 640px;
        line-height: 1.8;
    }

    /* Chips / Pill */
    .chips-row {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
        align-items: center;
    }

    .chip {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 20px;
        font-size: 14px;
        font-weight: 600;
        color: var(--text-soft);
        background: var(--bg-blue);
        border-radius: var(--radius-pill);
        border: 1px solid var(--border);
        transition: all var(--transition);
        cursor: pointer;
        white-space: nowrap;
    }

    .chip:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }

    .chip .chip-icon {
        font-size: 14px;
        color: var(--primary);
    }

    .chip:hover .chip-icon {
        color: #fff;
    }

    /* Card Grid */
    .card-grid {
        display: grid;
        gap: 24px;
    }

    .card-grid.two-col {
        grid-template-columns: repeat(2, 1fr);
    }

    .card-grid.three-col {
        grid-template-columns: repeat(3, 1fr);
    }

    .card-grid.four-col {
        grid-template-columns: repeat(4, 1fr);
    }

    /* Info Card */
    .info-card {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }

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

    .info-card .card-img {
        height: 200px;
        overflow: hidden;
        position: relative;
    }

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

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

    .info-card .card-body {
        padding: 20px 22px 22px;
        display: flex;
        flex-direction: column;
        gap: 10px;
        flex: 1;
    }

    .info-card .card-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 12px;
        font-weight: 700;
        color: var(--primary);
        background: var(--bg-blue);
        border-radius: var(--radius-pill);
        padding: 4px 14px;
        align-self: flex-start;
        letter-spacing: 0.3px;
    }

    .info-card .card-title {
        font-size: 18px;
        font-weight: 700;
        color: var(--text);
        line-height: 1.5;
        margin: 0;
        letter-spacing: 0.2px;
    }

    .info-card .card-excerpt {
        font-size: 14px;
        color: var(--text-soft);
        line-height: 1.8;
        margin: 0;
        flex: 1;
    }

    .info-card .card-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 14px;
        border-top: 1px solid var(--border);
        gap: 12px;
        flex-wrap: wrap;
    }

    .info-card .card-date {
        font-size: 13px;
        color: var(--text-muted);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .info-card .read-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        background: transparent;
        border: 1px solid var(--primary);
        border-radius: var(--radius-sm);
        padding: 8px 16px;
        transition: all var(--transition);
    }

    .info-card .read-btn:hover {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 2px 8px rgba(27, 101, 214, 0.25);
    }

    /* Data Stats Bar */
    .stats-bar {
        background: var(--bg-blue);
        border-radius: var(--radius-md);
        padding: 28px 24px;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        border: 1px solid var(--border);
    }

    .stat-item {
        text-align: center;
        padding: 8px 12px;
    }

    .stat-item .stat-value {
        font-size: 32px;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.2;
        letter-spacing: 0.5px;
    }

    .stat-item .stat-label {
        font-size: 14px;
        color: var(--text-soft);
        margin-top: 6px;
        font-weight: 500;
    }

    /* Tag Cloud */
    .tag-cloud {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
    }

    .tag-cloud .tag-item {
        display: inline-block;
        padding: 8px 18px;
        font-size: 14px;
        font-weight: 600;
        color: var(--text-soft);
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-pill);
        transition: all var(--transition);
        cursor: pointer;
    }

    .tag-cloud .tag-item:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
        transform: translateY(-2px);
    }

    /* Related category cards */
    .related-card {
        display: flex;
        align-items: center;
        gap: 16px;
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 18px 20px;
        transition: all var(--transition);
        box-shadow: var(--shadow-sm);
    }

    .related-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-md);
        border-color: var(--primary-light);
    }

    .related-card .related-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        background: var(--bg-blue);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        color: var(--primary);
        flex-shrink: 0;
    }

    .related-card .related-info h4 {
        font-size: 16px;
        font-weight: 700;
        color: var(--text);
        margin: 0 0 2px;
    }

    .related-card .related-info p {
        font-size: 13px;
        color: var(--text-muted);
        margin: 0;
    }

    .related-card .related-arrow {
        margin-left: auto;
        color: var(--primary);
        font-size: 18px;
        flex-shrink: 0;
    }

    /* FAQ */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .faq-item {
        background: var(--card-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition);
    }

    .faq-item:hover {
        border-color: var(--primary-light);
        box-shadow: var(--shadow-sm);
    }

    .faq-question {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 18px 22px;
        cursor: pointer;
        font-weight: 700;
        font-size: 16px;
        color: var(--text);
        user-select: none;
        transition: background var(--transition);
    }

    .faq-question:hover {
        background: var(--bg-blue);
    }

    .faq-question .faq-icon {
        width: 32px;
        height: 32px;
        border-radius: 8px;
        background: var(--bg-blue);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        font-size: 14px;
        font-weight: 700;
    }

    .faq-question .faq-toggle {
        margin-left: auto;
        font-size: 14px;
        color: var(--text-muted);
        transition: transform var(--transition);
    }

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

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 22px;
        color: var(--text-soft);
        font-size: 15px;
        line-height: 1.85;
    }

    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 22px 20px;
    }

    /* Bottom CTA */
    .bottom-cta {
        background: linear-gradient(135deg, #0b1b33 0%, #102a54 50%, #143a6e 100%);
        border-radius: var(--radius-lg);
        padding: 44px 36px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
        position: relative;
        overflow: hidden;
    }

    .bottom-cta::before {
        content: '';
        position: absolute;
        top: -80px;
        right: -40px;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(27, 101, 214, 0.35) 0%, rgba(27, 101, 214, 0) 70%);
        pointer-events: none;
    }

    .bottom-cta .cta-text {
        position: relative;
        z-index: 1;
    }

    .bottom-cta .cta-text h3 {
        font-size: 24px;
        font-weight: 800;
        color: #fff;
        margin: 0 0 8px;
    }

    .bottom-cta .cta-text p {
        color: rgba(255, 255, 255, 0.75);
        margin: 0;
        font-size: 15px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 16px;
        font-weight: 700;
        padding: 14px 28px;
        border-radius: 12px;
        transition: all var(--transition);
        cursor: pointer;
        border: none;
        position: relative;
        z-index: 1;
        white-space: nowrap;
    }

    .btn-primary {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 16px rgba(27, 101, 214, 0.3);
    }

    .btn-primary:hover {
        background: var(--primary-dark);
        color: #fff;
        box-shadow: 0 6px 22px rgba(27, 101, 214, 0.4);
        transform: translateY(-2px);
    }

    .btn-primary:focus {
        outline: 3px solid rgba(27, 101, 214, 0.3);
        outline-offset: 2px;
    }

    .btn-outline {
        background: transparent;
        color: var(--primary);
        border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
        background: var(--bg-blue);
        color: var(--primary-dark);
        transform: translateY(-2px);
    }

    .btn-white {
        background: #fff;
        color: var(--primary);
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
    }

    .btn-white:hover {
        background: #f0f4fb;
        color: var(--primary-dark);
        transform: translateY(-2px);
    }

    /* Footer */
    .site-footer {
        background: #0b1b33;
        color: #b8c5d6;
        padding: 56px 0 0;
        margin-top: 0;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-brand .footer-logo {
        font-size: 22px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .footer-brand .footer-logo span {
        color: #3d82e8;
    }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: #9aabbf;
        margin: 0;
    }

    .footer-col h4 {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin: 0 0 16px;
        letter-spacing: 0.3px;
    }

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

    .footer-col ul li a {
        color: #9aabbf;
        font-size: 14px;
        transition: color var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .footer-col ul li a:hover {
        color: #fff;
    }

    .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 22px 0;
        font-size: 13px;
        color: #6b7a8f;
        flex-wrap: wrap;
        gap: 12px;
    }

    .footer-bottom a {
        color: #9aabbf;
        font-size: 13px;
        transition: color var(--transition);
    }

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

    /* Responsive */
    @media (max-width: 1024px) {
        :root {
            --space-section: 56px;
        }
        .page-hero {
            min-height: 280px;
            padding: 40px 0 48px;
        }
        .page-hero h1 {
            font-size: 30px;
        }
        .card-grid.three-col,
        .card-grid.four-col {
            grid-template-columns: repeat(2, 1fr);
        }
        .stats-bar {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
    }

    @media (max-width: 768px) {
        .nav-toggle {
            display: flex;
        }
        .nav-main {
            display: none;
            width: 100%;
            flex-direction: column;
            align-items: stretch;
            gap: 4px;
            padding: 12px 0 8px;
            border-top: 1px solid var(--border);
            margin-top: 12px;
        }
        .nav-main.open {
            display: flex;
        }
        .nav-main a {
            padding: 12px 16px;
            text-align: left;
            width: 100%;
        }
        .nav-badge {
            align-self: flex-start;
            margin-top: 4px;
        }
        .page-hero {
            min-height: 260px;
            padding: 32px 0 40px;
        }
        .page-hero h1 {
            font-size: 24px;
        }
        .page-hero .hero-desc {
            font-size: 15px;
        }
        .card-grid.two-col,
        .card-grid.three-col,
        .card-grid.four-col {
            grid-template-columns: 1fr;
        }
        .stats-bar {
            grid-template-columns: 1fr 1fr;
            padding: 20px 16px;
            gap: 12px;
        }
        .stat-item .stat-value {
            font-size: 24px;
        }
        .bottom-cta {
            flex-direction: column;
            align-items: flex-start;
            padding: 32px 24px;
        }
        .bottom-cta .cta-text h3 {
            font-size: 20px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
        }
        :root {
            --space-section: 44px;
        }
        .section-title {
            font-size: 22px;
        }
        .info-card .card-img {
            height: 170px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 14px;
        }
        .page-hero h1 {
            font-size: 21px;
        }
        .hero-desc {
            font-size: 14px;
        }
        .stats-bar {
            grid-template-columns: 1fr;
        }
        .chip {
            padding: 8px 14px;
            font-size: 13px;
        }
        .info-card .card-body {
            padding: 16px 16px 18px;
        }
        .info-card .card-title {
            font-size: 16px;
        }
        .btn {
            padding: 12px 20px;
            font-size: 14px;
        }
    }

/* roulang page: category6 */
:root {
            --primary: #1B65D6;
            --primary-dark: #154ea8;
            --primary-light: #3d82e8;
            --accent: #17A34A;
            --amber: #D97706;
            --bg: #F5F7FA;
            --bg-blue: #EFF4FB;
            --text: #0F1E33;
            --text-soft: #41536b;
            --text-muted: #6b7a8f;
            --border: #dbe3ef;
            --card-bg: #ffffff;
            --shadow-sm: 0 2px 8px rgba(15, 30, 51, 0.05);
            --shadow-md: 0 8px 24px rgba(15, 30, 51, 0.06);
            --shadow-lg: 0 16px 40px rgba(15, 30, 51, 0.1);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-pill: 999px;
            --space-section: 72px;
            --space-card: 24px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            --transition: 0.22s ease;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header / Navigation */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(15, 30, 51, 0.04);
        }
        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 20px;
            flex-wrap: wrap;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }
        .logo a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: var(--text);
        }
        .logo span {
            color: var(--primary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-soft);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: var(--bg-blue);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
        }
        .nav-main a.active:hover {
            color: #fff;
            background: var(--primary-dark);
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFF7E6;
            color: var(--amber);
            font-size: 13px;
            font-weight: 700;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #F5D9A8;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .nav-badge:hover {
            background: var(--amber);
            color: #fff;
            border-color: var(--amber);
        }
        .nav-badge .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--amber);
            border-radius: 50%;
            animation: pulse-dot 1.6s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.7); }
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            cursor: pointer;
            font-size: 20px;
            color: var(--text);
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-blue);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Breadcrumb */
        .breadcrumb-section {
            background: var(--bg-blue);
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--primary);
            font-weight: 600;
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-soft);
            font-weight: 600;
        }

        /* Category Header */
        .category-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 48px 0 40px;
        }
        .category-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 16px;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .category-header h1 .accent-text {
            color: var(--primary);
        }
        .category-header .category-desc {
            font-size: 16px;
            color: var(--text-soft);
            max-width: 780px;
            line-height: 1.8;
            margin: 0;
        }

        /* Chips / Category Entry */
        .chips-section {
            padding: 32px 0;
            background: var(--bg);
        }
        .chips-wrapper {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .chip-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            color: var(--text-soft);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-pill);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .chip-link i {
            color: var(--primary);
            font-size: 14px;
        }
        .chip-link:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .chip-link:hover i {
            color: #fff;
        }

        /* Article List Section */
        .article-list-section {
            padding: 56px 0 64px;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-heading-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-heading-row h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            margin: 0;
            letter-spacing: 0.3px;
        }
        .section-heading-row .section-meta {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .article-card .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-blue);
        }
        .article-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .card-image img {
            transform: scale(1.05);
        }
        .article-card .card-image .image-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: var(--radius-pill);
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(6px);
        }
        .article-card .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-body .card-excerpt {
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.75;
            margin: 0 0 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .article-card .card-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-card .card-date i {
            font-size: 12px;
        }
        .article-card .read-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            background: var(--bg-blue);
            border: none;
            cursor: pointer;
        }
        .article-card .read-btn:hover {
            background: var(--primary);
            color: #fff;
        }

        /* Data Snapshot */
        .data-snapshot-section {
            padding: 48px 0;
            background: var(--bg-blue);
        }
        .snapshot-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .snapshot-item {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .snapshot-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-3px);
        }
        .snapshot-item .snapshot-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .snapshot-item .snapshot-label {
            font-size: 14px;
            color: var(--text-soft);
            font-weight: 500;
        }

        /* Tags & Topics */
        .topics-section {
            padding: 56px 0;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .tags-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .tag-badge {
            display: inline-block;
            background: var(--bg-blue);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            border: 1px solid #d0ddf0;
            transition: all var(--transition);
        }
        .tag-badge:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .topic-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .topic-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
            transform: translateY(-4px);
        }
        .topic-card .topic-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }
        .topic-card .topic-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .topic-card:hover .topic-image img {
            transform: scale(1.06);
        }
        .topic-card .topic-body {
            padding: 20px 22px 22px;
        }
        .topic-card .topic-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
            line-height: 1.5;
        }
        .topic-card .topic-body p {
            font-size: 14px;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-section {
            padding: 56px 0;
            background: var(--bg-blue);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
            border-color: #c5d5f0;
        }
        .faq-item summary {
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            list-style: none;
            display: flex;
            align-items: center;
            gap: 14px;
            user-select: none;
            transition: all var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-number {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
        }
        .faq-item summary .faq-icon {
            margin-left: auto;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px 66px;
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
        }

        /* Related Categories */
        .related-cats-section {
            padding: 56px 0;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }
        .related-cat-card {
            background: var(--bg-blue);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
        }
        .related-cat-card i {
            font-size: 22px;
            color: var(--primary);
            transition: all var(--transition);
        }
        .related-cat-card span {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-soft);
            transition: all var(--transition);
        }
        .related-cat-card:hover {
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .related-cat-card:hover i {
            color: #fff;
        }
        .related-cat-card:hover span {
            color: #fff;
        }

        /* News Briefs */
        .briefs-section {
            padding: 40px 0 48px;
            background: var(--bg);
        }
        .briefs-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .brief-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            box-shadow: var(--shadow-sm);
            display: flex;
            gap: 14px;
            align-items: flex-start;
            transition: all var(--transition);
        }
        .brief-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }
        .brief-item .brief-icon {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            background: #FFF7E6;
            color: var(--amber);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }
        .brief-item .brief-content {
            flex: 1;
        }
        .brief-item .brief-content p {
            font-size: 14px;
            color: var(--text-soft);
            margin: 0 0 6px;
            line-height: 1.7;
            font-weight: 600;
        }
        .brief-item .brief-content .brief-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Bottom CTA */
        .bottom-cta-section {
            padding: 60px 0 64px;
            background: linear-gradient(135deg, #0b1b33 0%, #10284a 50%, #1a3d70 100%);
        }
        .bottom-cta-inner {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .bottom-cta-inner h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin: 0 0 12px;
            letter-spacing: 0.3px;
        }
        .bottom-cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.82);
            margin: 0 0 28px;
            line-height: 1.7;
        }
        .bottom-cta-inner .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 32px;
            border-radius: var(--radius-pill);
            border: 2px solid var(--primary);
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .bottom-cta-inner .cta-btn:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            text-decoration: none;
        }

        /* Footer */
        .site-footer {
            background: #0F1E33;
            color: #c9d4e0;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-logo i {
            color: var(--primary-light);
            margin-right: 6px;
        }
        .footer-logo span {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 14px;
            color: #9aa8b8;
            line-height: 1.8;
            margin: 0;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #9aa8b8;
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            padding: 20px 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #7a8a9c;
        }
        .footer-bottom a {
            color: #9aa8b8;
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .snapshot-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .briefs-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-top {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-main {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding-top: 12px;
                border-top: 1px solid var(--border);
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                text-align: center;
                padding: 12px 16px;
            }
            .nav-badge {
                justify-content: center;
            }
            .category-header h1 {
                font-size: 26px;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .snapshot-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .topic-cards-grid {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .briefs-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-heading-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .bottom-cta-inner h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-header {
                padding: 32px 0 28px;
            }
            .category-header h1 {
                font-size: 22px;
            }
            .snapshot-grid {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-card .card-body {
                padding: 16px 18px 18px;
            }
            .topic-card .topic-body {
                padding: 16px 18px 18px;
            }
            .faq-item summary {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 18px 16px 58px;
                font-size: 14px;
            }
        }