/* roulang page: index */
:root {
            --color-primary: #0d2b45;
            --color-primary-light: #1a4568;
            --color-accent: #c8963e;
            --color-accent-light: #d9b068;
            --color-accent-dark: #a67a2e;
            --color-bg: #ffffff;
            --color-bg-light: #f7f8fa;
            --color-bg-alt: #f0f2f5;
            --color-bg-dark: #0d2b45;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-light: #94a3b8;
            --color-text-on-dark: #e8ecf1;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.12), 0 8px 20px rgba(0, 0, 0, 0.06);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-width: 320px;
        }

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

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

        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            padding: 0;
        }

        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        input {
            font-family: inherit;
        }

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0;
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-primary);
        }

        p {
            margin: 0 0 1rem;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (min-width: 768px) {
            .container {
                padding: 0 32px;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding: 0 40px;
            }
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #ffffff;
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-normal);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        @media (min-width: 768px) {
            .header-inner {
                padding: 0 32px;
            }
        }
        @media (min-width: 1024px) {
            .header-inner {
                padding: 0 40px;
            }
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--color-accent);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-main a:hover {
            color: var(--color-primary);
            background: var(--color-bg-light);
        }
        .nav-main a.active {
            color: var(--color-primary);
            font-weight: 600;
            background: var(--color-bg-alt);
        }
        .nav-main a .nav-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-left: 6px;
            font-size: 0.7rem;
            padding: 2px 7px;
            border-radius: 20px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 600;
            line-height: 1;
        }
        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 25px;
            font-size: 0.9rem;
            font-weight: 600;
            background: var(--color-accent);
            color: #fff !important;
            white-space: nowrap;
            transition: all var(--transition-normal);
            box-shadow: 0 2px 8px rgba(200, 150, 62, 0.3);
            letter-spacing: 0.3px;
        }
        .nav-cta-btn:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 4px 16px rgba(200, 150, 62, 0.45);
            transform: translateY(-1px);
            color: #fff !important;
        }

        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--color-bg-light);
            color: var(--color-primary);
            font-size: 1.3rem;
            transition: background var(--transition-fast);
        }
        .mobile-menu-toggle:hover {
            background: var(--color-bg-alt);
        }

        @media (max-width: 1023px) {
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-main {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px 24px;
                gap: 4px;
                border-bottom: 2px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-normal);
                z-index: 999;
                max-height: calc(100vh - var(--nav-height));
                overflow-y: auto;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-md);
            }
            .nav-cta-btn {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
                border-radius: var(--radius-md);
            }
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background: var(--color-bg-dark);
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 43, 69, 0.88) 0%, rgba(13, 43, 69, 0.72) 50%, rgba(13, 43, 69, 0.82) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 60px 20px;
            color: #fff;
        }
        @media (min-width: 768px) {
            .hero-content {
                padding: 80px 32px;
            }
        }
        @media (min-width: 1024px) {
            .hero-content {
                padding: 100px 40px;
                display: flex;
                align-items: center;
                gap: 60px;
            }
            .hero-section {
                min-height: 620px;
            }
        }
        .hero-text {
            flex: 1;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            font-size: 0.85rem;
            font-weight: 500;
            color: #f0e6d2;
            margin-bottom: 16px;
            letter-spacing: 0.8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            line-height: 1.25;
        }
        .hero-title .accent {
            color: var(--color-accent-light);
        }
        @media (min-width: 768px) {
            .hero-title {
                font-size: 2.9rem;
            }
        }
        @media (min-width: 1024px) {
            .hero-title {
                font-size: 3.3rem;
            }
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: #c8d6e5;
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 560px;
        }
        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            background: var(--color-accent);
            color: #fff;
            transition: all var(--transition-normal);
            box-shadow: 0 4px 14px rgba(200, 150, 62, 0.4);
            letter-spacing: 0.3px;
        }
        .btn-primary:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 8px 24px rgba(200, 150, 62, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 28px;
            font-size: 1rem;
            font-weight: 600;
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            transition: all var(--transition-normal);
            letter-spacing: 0.3px;
        }
        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }
        .hero-stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }
        .hero-stat-item {
            text-align: center;
            min-width: 70px;
        }
        .hero-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent-light);
            line-height: 1;
        }
        .hero-stat-label {
            font-size: 0.8rem;
            color: #a0b8cc;
            margin-top: 4px;
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 60px 0;
        }
        @media (min-width: 768px) {
            .section {
                padding: 80px 0;
            }
        }
        @media (min-width: 1024px) {
            .section {
                padding: 100px 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        @media (min-width: 768px) {
            .section-title {
                font-size: 2.3rem;
            }
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-bg-light {
            background: var(--color-bg-light);
        }
        .section-bg-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-on-dark);
        }
        .section-bg-dark .section-title {
            color: #fff;
        }
        .section-bg-dark .section-desc {
            color: #b8c9d8;
        }
        .section-bg-dark .section-label {
            color: var(--color-accent-light);
        }

        /* ========== BRAND INTRO ========== */
        .brand-intro-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 36px;
            align-items: center;
        }
        @media (min-width: 768px) {
            .brand-intro-grid {
                grid-template-columns: 1fr 1fr;
                gap: 48px;
            }
        }
        .brand-intro-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .brand-intro-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .brand-intro-text h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--color-primary);
        }
        .brand-intro-text p {
            color: var(--color-text-secondary);
            line-height: 1.85;
            margin-bottom: 12px;
            font-size: 0.98rem;
        }

        /* ========== DATA STATS ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        @media (min-width: 640px) {
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }
        }
        @media (min-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(5, 1fr);
                gap: 24px;
            }
        }
        .stat-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--color-accent-light);
        }
        .stat-card .stat-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 10px;
        }
        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-card .stat-unit {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-accent);
        }
        .stat-card .stat-label {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            margin-top: 4px;
        }

        /* ========== ADVANTAGE CARDS ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        @media (min-width: 640px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .cards-grid.cols-4 {
                grid-template-columns: repeat(4, 1fr);
            }
            .cards-grid.cols-3 {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .adv-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            text-align: center;
        }
        .adv-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .adv-card .adv-icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            color: var(--color-accent);
            font-size: 1.6rem;
            margin-bottom: 18px;
            transition: all var(--transition-normal);
        }
        .adv-card:hover .adv-icon-circle {
            background: var(--color-accent);
            color: #fff;
        }
        .adv-card h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--color-primary);
        }
        .adv-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* ========== BRAND STORY ========== */
        .brand-story-block {
            display: grid;
            grid-template-columns: 1fr;
            gap: 36px;
            align-items: center;
        }
        @media (min-width: 768px) {
            .brand-story-block {
                grid-template-columns: 1.2fr 1fr;
                gap: 50px;
            }
        }
        .brand-story-img-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4/3;
        }
        .brand-story-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .brand-story-img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(13, 43, 69, 0.3) 0%, transparent 60%);
            border-radius: var(--radius-lg);
        }
        .brand-story-text h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--color-primary);
        }
        .brand-story-text p {
            color: var(--color-text-secondary);
            line-height: 1.9;
            margin-bottom: 14px;
            font-size: 0.98rem;
        }

        /* ========== SERVICE / EVENT CARDS ========== */
        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .service-card-img {
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .service-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .service-card:hover .service-card-img img {
            transform: scale(1.04);
        }
        .service-card-body {
            padding: 20px;
        }
        .service-card-body h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--color-primary);
        }
        .service-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .service-card-body .card-link {
            font-weight: 600;
            color: var(--color-accent);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-fast);
        }
        .service-card-body .card-link:hover {
            gap: 9px;
            color: var(--color-accent-dark);
        }

        /* ========== PARTNERS ========== */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px 40px;
            align-items: center;
        }
        .partner-item {
            padding: 16px 20px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            font-weight: 600;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            text-align: center;
            min-width: 110px;
            transition: all var(--transition-fast);
            border: 1px solid var(--color-border-light);
        }
        .partner-item:hover {
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent-light);
        }

        /* ========== TESTIMONIALS ========== */
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            position: relative;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
        }
        .testimonial-card .quote-icon {
            font-size: 2rem;
            color: var(--color-accent-light);
            opacity: 0.5;
            margin-bottom: 10px;
        }
        .testimonial-card p {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            font-style: italic;
        }
        .testimonial-card .author {
            font-weight: 600;
            color: var(--color-primary);
            font-size: 0.9rem;
        }
        .testimonial-card .author-role {
            font-size: 0.8rem;
            color: var(--color-text-light);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-accent-light);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: color var(--transition-fast);
            background: none;
            cursor: pointer;
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-normal);
            color: var(--color-accent);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            color: var(--color-text-secondary);
            font-size: 0.93rem;
            line-height: 1.8;
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        @media (min-width: 640px) {
            .news-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .news-list {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .news-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .news-card-img {
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.03);
        }
        .news-card-body {
            padding: 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-date {
            font-size: 0.8rem;
            color: var(--color-text-light);
            margin-bottom: 6px;
        }
        .news-card-body h4 {
            font-size: 1rem;
            margin-bottom: 8px;
            color: var(--color-primary);
            line-height: 1.4;
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.55;
            flex: 1;
            margin-bottom: 12px;
        }
        .news-card-body .read-more {
            font-weight: 600;
            color: var(--color-accent);
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-fast);
            align-self: flex-start;
        }
        .news-card-body .read-more:hover {
            gap: 8px;
            color: var(--color-accent-dark);
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            background: var(--color-bg-dark);
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            text-align: center;
            padding: 80px 20px;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(13, 43, 69, 0.85);
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 650px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: #c8d6e5;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-content .btn-primary {
            font-size: 1.05rem;
            padding: 14px 34px;
            border-radius: 30px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0a1f33;
            color: #b0c4d6;
            padding: 50px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1.5fr repeat(3, 1fr);
                gap: 40px;
            }
        }
        .footer-brand .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #8ea0b4;
            margin-bottom: 0;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 14px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: #8ea0b4;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 36px;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #6a7f94;
        }
        .footer-bottom a {
            color: #8ea0b4;
        }
        .footer-bottom a:hover {
            color: var(--color-accent-light);
        }

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

        /* ========== RESPONSIVE FINE-TUNING ========== */
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-buttons {
                flex-direction: column;
            }
            .hero-buttons .btn-primary,
            .hero-buttons .btn-outline {
                width: 100%;
                justify-content: center;
                text-align: center;
            }
            .hero-stats-row {
                gap: 16px;
                justify-content: center;
            }
            .hero-stat-num {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .cta-content h2 {
                font-size: 1.5rem;
            }
            .partners-row {
                gap: 12px 18px;
            }
            .partner-item {
                min-width: 80px;
                padding: 12px 14px;
                font-size: 0.82rem;
            }
        }
        @media (min-width: 521px) and (max-width: 767px) {
            .hero-title {
                font-size: 2.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #1a3c5e;
            --color-primary-light: #1e4d7b;
            --color-accent: #d4952b;
            --color-accent-hover: #c08020;
            --color-accent-light: #f5e6cc;
            --color-bg: #fafafa;
            --color-white: #ffffff;
            --color-text: #1e1e1e;
            --color-text-weak: #5a5a5a;
            --color-text-muted: #888888;
            --color-border: #e2e2e2;
            --color-border-light: #eeeeee;
            --color-card-bg: #ffffff;
            --color-section-alt: #f5f6f8;
            --color-success: #2e8b57;
            --color-warning: #e8890c;
            --color-danger: #c0392b;
            --color-tag-bg: #eef4fb;
            --color-tag-text: #1a3c5e;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 22px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.07);
            --shadow: 0 4px 18px rgba(0, 0, 0, 0.09);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.11);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.13);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --transition-fast: 0.18s ease;
            --transition: 0.3s ease;
            --transition-slow: 0.45s ease;
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            line-height: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition-fast);
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        h1,
        h2,
        h3,
        h4,
        h5 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-primary);
            margin: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        @media (min-width: 1200px) {
            .container {
                max-width: 1240px;
            }
        }

        .section-spacing {
            padding: var(--spacing-2xl) 0;
        }
        @media (max-width: 768px) {
            .section-spacing {
                padding: var(--spacing-xl) 0;
            }
        }
        @media (max-width: 520px) {
            .section-spacing {
                padding: var(--spacing-lg) 0;
            }
        }

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

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }
        .section-header h2 {
            font-size: 2rem;
            color: var(--color-primary);
            margin-bottom: var(--spacing-sm);
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 56px;
            height: 3px;
            background: var(--color-accent);
            margin: 10px auto 0;
            border-radius: 3px;
        }
        .section-header p {
            color: var(--color-text-weak);
            font-size: 1.05rem;
            max-width: 680px;
            margin: var(--spacing-sm) auto 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background: var(--color-accent-hover);
            color: #fff;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .btn-white {
            background: #fff;
            color: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .btn-white:hover {
            background: #f0f0f0;
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }

        .tag {
            display: inline-block;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            white-space: nowrap;
        }
        .tag-accent {
            background: var(--color-accent-light);
            color: #8b5e14;
        }
        .tag-hot {
            background: #fde8e8;
            color: #b91c1c;
        }

        .badge-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            margin-right: 6px;
            vertical-align: middle;
        }

        .divider {
            border: 0;
            height: 1px;
            background: var(--color-border-light);
            margin: var(--spacing-lg) 0;
        }
        .divider-accent {
            height: 2px;
            background: linear-gradient(90deg, var(--color-accent), transparent);
            border: 0;
            margin: var(--spacing-sm) 0 var(--spacing-lg);
            width: 80px;
        }

        .card {
            background: var(--color-card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .card-body {
            padding: var(--spacing-md);
        }

        /* ===== HEADER / NAV ===== */
        .site-header {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            padding: 14px 0;
        }
        .header-logo {
            font-size: 1.55rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-logo i {
            color: var(--color-accent);
            font-size: 1.3rem;
        }
        .header-logo:hover {
            color: var(--color-primary-light);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 9px 15px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-text);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .nav-main a:hover {
            color: var(--color-primary);
            background: #f4f6f9;
        }
        .nav-main a.active {
            color: var(--color-white);
            background: var(--color-primary);
            box-shadow: var(--shadow-sm);
        }
        .nav-badge {
            display: inline-block;
            background: #e74c3c;
            color: #fff;
            font-size: 0.68rem;
            padding: 2px 7px;
            border-radius: 10px;
            font-weight: 700;
            letter-spacing: 0.03em;
            animation: pulse-badge 2s infinite;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.15);
            }
        }
        .nav-cta-btn {
            background: var(--color-accent) !important;
            color: #fff !important;
            padding: 9px 19px !important;
            border-radius: var(--radius) !important;
            font-weight: 700 !important;
            letter-spacing: 0.02em;
            box-shadow: var(--shadow-sm);
        }
        .nav-cta-btn:hover {
            background: var(--color-accent-hover) !important;
            color: #fff !important;
            box-shadow: var(--shadow) !important;
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            background: none;
            font-size: 1.6rem;
            color: var(--color-primary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            line-height: 1;
        }
        @media (max-width: 1024px) {
            .nav-main {
                gap: 2px;
            }
            .nav-main a {
                padding: 7px 10px;
                font-size: 0.82rem;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: inline-block;
            }
            .nav-main {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 2px;
                padding-top: 8px;
                border-top: 1px solid var(--color-border-light);
                margin-top: 4px;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                width: 100%;
                justify-content: flex-start;
                padding: 10px 14px;
                font-size: 0.9rem;
            }
            .nav-cta-btn {
                justify-content: center !important;
                margin-top: 4px;
            }
        }

        /* ===== BANNER ===== */
        .banner-section {
            position: relative;
            background: url('assets/images/backpic/back-2.webp') center/cover no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
        }
        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 60, 94, 0.88) 0%, rgba(26, 60, 94, 0.72) 100%);
            z-index: 1;
        }
        .banner-content {
            position: relative;
            z-index: 2;
            padding: var(--spacing-2xl) var(--spacing-md);
            max-width: 800px;
        }
        .banner-content h1 {
            font-size: 2.6rem;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.03em;
        }
        .banner-content .banner-subtitle {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: var(--spacing-md);
            line-height: 1.5;
        }
        .banner-breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            flex-wrap: wrap;
        }
        .banner-breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
        }
        .banner-breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .banner-breadcrumb .sep {
            color: var(--color-accent);
        }
        @media (max-width: 768px) {
            .banner-section {
                min-height: 280px;
            }
            .banner-content h1 {
                font-size: 1.9rem;
            }
            .banner-content .banner-subtitle {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .banner-section {
                min-height: 240px;
            }
            .banner-content h1 {
                font-size: 1.55rem;
            }
        }

        /* ===== INTRO ===== */
        .intro-section {}
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .intro-text h3 {
            font-size: 1.5rem;
            color: var(--color-primary);
            margin-bottom: var(--spacing-sm);
        }
        .intro-text p {
            color: var(--color-text-weak);
            line-height: 1.75;
            margin-bottom: var(--spacing-sm);
        }
        .intro-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .intro-image {
                order: -1;
            }
        }

        /* ===== GUIDE CARDS ===== */
        .guide-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }
        .guide-card {
            background: var(--color-card-bg);
            border-radius: var(--radius);
            padding: var(--spacing-lg) var(--spacing-md);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            text-align: center;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .guide-card-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--color-accent-light);
            color: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto var(--spacing-sm);
            transition: all var(--transition);
        }
        .guide-card:hover .guide-card-icon {
            background: var(--color-accent);
            color: #fff;
            transform: scale(1.08);
        }
        .guide-card h4 {
            font-size: 1.1rem;
            color: var(--color-primary);
            margin-bottom: 6px;
        }
        .guide-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.55;
        }
        @media (max-width: 1024px) {
            .guide-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .guide-cards-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== DETAIL TIPS ===== */
        .tips-list {}
        .tip-item {
            display: flex;
            gap: var(--spacing-md);
            background: var(--color-card-bg);
            border-radius: var(--radius);
            padding: var(--spacing-lg);
            margin-bottom: var(--spacing-md);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .tip-item:hover {
            box-shadow: var(--shadow);
            border-color: transparent;
        }
        .tip-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .tip-content h4 {
            font-size: 1.08rem;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .tip-content p {
            font-size: 0.93rem;
            color: var(--color-text-weak);
            line-height: 1.6;
            margin: 0;
        }
        @media (max-width: 520px) {
            .tip-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .tip-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
        }

        /* ===== PITFALLS ===== */
        .pitfalls-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }
        .pitfall-card {
            background: #fff;
            border-radius: var(--radius);
            padding: var(--spacing-lg);
            border-left: 4px solid var(--color-danger);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
        }
        .pitfall-card:hover {
            box-shadow: var(--shadow);
            transform: translateX(3px);
        }
        .pitfall-card h4 {
            font-size: 1.05rem;
            color: var(--color-danger);
            margin-bottom: 6px;
        }
        .pitfall-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.55;
            margin: 0;
        }
        @media (max-width: 768px) {
            .pitfalls-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== TOOLS RECOMMEND ===== */
        .tools-reco-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            padding: var(--spacing-xl);
            display: flex;
            gap: var(--spacing-lg);
            align-items: center;
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .tools-reco-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .tools-reco-icon {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            border-radius: var(--radius);
            background: var(--color-accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--color-accent);
        }
        .tools-reco-body h4 {
            font-size: 1.2rem;
            color: var(--color-primary);
            margin-bottom: 4px;
        }
        .tools-reco-body p {
            font-size: 0.95rem;
            color: var(--color-text-weak);
            margin: 0 0 var(--spacing-sm);
            line-height: 1.55;
        }
        @media (max-width: 600px) {
            .tools-reco-card {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== FAQ ACCORDION ===== */
        .faq-accordion {}
        .faq-item {
            background: var(--color-card-bg);
            border-radius: var(--radius);
            margin-bottom: var(--spacing-sm);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            background: none;
            text-align: left;
            padding: var(--spacing-md) var(--spacing-lg);
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            cursor: pointer;
            border: none;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: #fafbfc;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition);
            font-size: 0.85rem;
            color: var(--color-accent);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 var(--spacing-lg) var(--spacing-md);
            font-size: 0.93rem;
            color: var(--color-text-weak);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
            top: -80px;
            right: -80px;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
            bottom: -60px;
            left: -60px;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: var(--spacing-sm);
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.05rem;
            margin-bottom: var(--spacing-lg);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-buttons {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #1a1f2b;
            color: #c4c7cc;
            padding: var(--spacing-2xl) 0 var(--spacing-md);
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            padding-bottom: var(--spacing-lg);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand {}
        .footer-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.02em;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: #a8abb2;
            line-height: 1.6;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            font-weight: 700;
        }
        .footer-col ul {}
        .footer-col ul li {
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: #a8abb2;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            text-align: center;
            padding-top: var(--spacing-md);
            font-size: 0.8rem;
            color: #7a7d84;
            line-height: 1.5;
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-lg);
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-brand {
                grid-column: auto;
            }
        }

        /* ===== UTILITY ===== */
        .text-accent {
            color: var(--color-accent);
        }
        .text-center {
            text-align: center;
        }
        .mt-md {
            margin-top: var(--spacing-md);
        }
        .mt-lg {
            margin-top: var(--spacing-lg);
        }
        .mt-xl {
            margin-top: var(--spacing-xl);
        }
        .mb-md {
            margin-bottom: var(--spacing-md);
        }
        .mb-lg {
            margin-bottom: var(--spacing-lg);
        }
        .mb-0 {
            margin-bottom: 0;
        }

/* roulang page: category1 */
:root {
            --primary: #0d2b45;
            --primary-light: #1a4a70;
            --primary-mid: #1e5685;
            --accent: #c9a96e;
            --accent-light: #d9c08e;
            --accent-dark: #b8923f;
            --bg: #ffffff;
            --bg-light: #f6f7f9;
            --bg-lighter: #fafbfc;
            --bg-dark: #091c2e;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-strong: #0f172a;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --text-on-dark: #e8ecf1;
            --text-on-primary: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --border-strong: #cbd5e1;
            --radius-xs: 4px;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --header-height: 68px;
            --container-max: 1200px;
            --container-narrow: 960px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            padding: 0;
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            outline: none;
            transition: all var(--transition-fast);
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(201, 169, 110, 0.5);
            outline-offset: 2px;
        }

        input {
            font-family: var(--font-sans);
            font-size: 15px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        input:focus {
            border-color: var(--accent) !important;
            box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.12) !important;
            outline: none;
        }

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

        /* ========== HEADER & NAVIGATION ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-dark);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.18);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            gap: 20px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            font-weight: 700;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--accent);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 9px 15px;
            border-radius: var(--radius-sm);
            font-size: 0.93rem;
            font-weight: 500;
            color: #c5cdd8;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.2px;
        }
        .nav-main a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-main a.active {
            color: var(--accent);
            background: rgba(201, 169, 110, 0.10);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 15px;
            right: 15px;
            height: 2.5px;
            background: var(--accent);
            border-radius: 3px;
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 700;
            background: #e53e3e;
            color: #fff;
            padding: 2px 7px;
            border-radius: 10px;
            line-height: 1;
            animation: pulse-badge 2s infinite;
            letter-spacing: 0;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.12);
            }
        }
        .nav-cta-btn {
            background: var(--accent) !important;
            color: #1a1a1a !important;
            font-weight: 700 !important;
            padding: 9px 18px !important;
            border-radius: var(--radius-sm) !important;
            letter-spacing: 0.3px !important;
            transition: all var(--transition) !important;
        }
        .nav-cta-btn:hover {
            background: var(--accent-light) !important;
            color: #1a1a1a !important;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(201, 169, 110, 0.35);
        }
        .nav-cta-btn::after {
            display: none !important;
        }
        .hamburger-btn {
            display: none;
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition-fast);
            line-height: 1;
        }
        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 0.88rem;
            color: var(--text-light);
            flex-wrap: wrap;
        }
        .breadcrumb-list li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-list a {
            color: var(--text-light);
            transition: color var(--transition-fast);
        }
        .breadcrumb-list a:hover {
            color: var(--accent);
        }
        .breadcrumb-list .sep {
            color: var(--text-lighter);
            font-size: 0.7rem;
        }
        .breadcrumb-list .current {
            color: var(--text-strong);
            font-weight: 600;
        }

        /* ========== HERO SECTION ========== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(13, 43, 69, 0.88) 0%, rgba(9, 28, 46, 0.93) 100%), url('assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 80px 0 70px;
            text-align: center;
            color: #fff;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(201, 169, 110, 0.08);
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(201, 169, 110, 0.05);
            pointer-events: none;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(201, 169, 110, 0.2);
            border: 1px solid rgba(201, 169, 110, 0.4);
            color: var(--accent-light);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin: 0 0 16px;
            letter-spacing: 1px;
            color: #ffffff;
            position: relative;
            z-index: 1;
            line-height: 1.25;
        }
        .category-hero h1 span {
            color: var(--accent);
        }
        .category-hero .hero-desc {
            font-size: 1.15rem;
            color: #c5cdd8;
            max-width: 680px;
            margin: 0 auto 30px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .category-hero .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: #a0aab4;
            margin-top: 4px;
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: 64px 0;
        }
        .section-sm {
            padding: 40px 0;
        }
        .section-lg {
            padding: 80px 0;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-light);
            margin-bottom: 36px;
            max-width: 600px;
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header .section-title {
            position: relative;
            display: inline-block;
        }
        .section-header .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }
        .bg-light {
            background: var(--bg-light);
        }
        .bg-dark {
            background: var(--bg-dark);
            color: var(--text-on-dark);
        }
        .bg-dark .section-title {
            color: #ffffff;
        }
        .bg-dark .section-subtitle {
            color: #b0bac5;
        }

        /* ========== FILTER TAGS ========== */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 32px;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            background: #fff;
            border: 1.5px solid var(--border);
            color: var(--text);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            user-select: none;
        }
        .filter-tag:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            background: #fefdf9;
            box-shadow: var(--shadow-xs);
        }
        .filter-tag.active-tag {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }
        .filter-tag .tag-icon {
            font-size: 0.85rem;
        }

        /* ========== ARTICLE CARDS ========== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border-strong);
        }
        .article-card-img {
            position: relative;
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: #e9ecf1;
        }
        .article-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-img img {
            transform: scale(1.06);
        }
        .article-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #1a1a1a;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-xs);
            letter-spacing: 0.3px;
            z-index: 2;
        }
        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 8px;
        }
        .article-card-title {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-strong);
            margin: 0 0 8px;
            line-height: 1.4;
            flex: 1;
        }
        .article-card-title a {
            color: inherit;
            transition: color var(--transition-fast);
        }
        .article-card-title a:hover {
            color: var(--accent-dark);
        }
        .article-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.55;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
            margin-top: auto;
        }
        .article-card-tag {
            font-size: 0.78rem;
            color: var(--primary-mid);
            font-weight: 600;
            background: rgba(30, 86, 133, 0.07);
            padding: 3px 10px;
            border-radius: 12px;
        }
        .article-card-readmore {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .article-card-readmore:hover {
            gap: 8px;
            color: var(--accent-dark);
        }

        /* ========== DATA PANEL ========== */
        .data-panel {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            overflow: hidden;
        }
        .data-panel-header {
            background: var(--primary);
            color: #fff;
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.3px;
        }
        .data-panel-body {
            padding: 24px;
        }
        .data-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            text-align: center;
        }
        .data-cell {
            background: var(--bg-lighter);
            border-radius: var(--radius);
            padding: 20px 16px;
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
        }
        .data-cell:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border-strong);
        }
        .data-cell-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }
        .data-cell-num.accent {
            color: var(--accent-dark);
        }
        .data-cell-label {
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 4px;
        }

        /* ========== FEATURES CARDS ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-xs);
        }
        .feature-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
            border-color: var(--border-strong);
        }
        .feature-icon-circle {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(201, 169, 110, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--accent-dark);
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon-circle {
            background: var(--accent);
            color: #1a1a1a;
            transform: scale(1.08);
        }
        .feature-card h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== CTA BLOCK ========== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .cta-block h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-block p {
            font-size: 1rem;
            color: #c5cdd8;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 28px;
            letter-spacing: 0.4px;
            transition: all var(--transition);
            position: relative;
            z-index: 1;
            box-shadow: 0 6px 22px rgba(201, 169, 110, 0.4);
        }
        .btn-cta-lg:hover {
            background: #d9c08e;
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(201, 169, 110, 0.5);
            color: #1a1a1a;
        }

        /* ========== FAQ ACCORDION ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-xs);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            background: #fff;
            border: none;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-strong);
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            transition: all var(--transition-fast);
            letter-spacing: 0.2px;
        }
        .faq-question:hover {
            color: var(--primary-mid);
            background: #fafcfd;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition);
            color: var(--text-light);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: #1a1a1a;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.93rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark);
            color: #b0bac5;
            padding: 48px 0 0;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-logo {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .footer-brand p {
            color: #8a95a3;
            line-height: 1.65;
            margin: 0;
            font-size: 0.88rem;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #e8ecf1;
            margin-bottom: 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: #8a95a3;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
            text-align: center;
            color: #6b7785;
            font-size: 0.82rem;
            line-height: 1.6;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .data-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .nav-main a {
                padding: 8px 10px;
                font-size: 0.85rem;
            }
            .header-inner {
                gap: 10px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 56px;
            }
            .hamburger-btn {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .nav-main {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-dark);
                padding: 12px 16px;
                gap: 4px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: var(--shadow-lg);
                z-index: 999;
            }
            .nav-main.mobile-open {
                display: flex;
            }
            .nav-main a {
                display: block;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-cta-btn {
                text-align: center;
                justify-content: center;
                margin-top: 4px;
            }
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .data-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-hero {
                padding: 50px 0 44px;
            }
            .category-hero h1 {
                font-size: 1.75rem;
            }
            .category-hero .hero-desc {
                font-size: 1rem;
                padding: 0 10px;
            }
            .category-hero .hero-stats-row {
                gap: 20px;
            }
            .hero-stat-num {
                font-size: 1.6rem;
            }
            .filter-tags {
                gap: 6px;
            }
            .filter-tag {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .cta-block {
                padding: 32px 20px;
            }
            .cta-block h3 {
                font-size: 1.3rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .container {
                padding: 0 16px;
            }
            .container-narrow {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-desc {
                font-size: 0.9rem;
            }
            .hero-stat-num {
                font-size: 1.3rem;
            }
            .hero-stat-label {
                font-size: 0.75rem;
            }
            .data-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .data-cell {
                padding: 14px 10px;
            }
            .data-cell-num {
                font-size: 1.4rem;
            }
            .btn-cta-lg {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .article-card-body {
                padding: 14px 16px 16px;
            }
            .article-card-title {
                font-size: 0.98rem;
            }
            .breadcrumb-list {
                font-size: 0.8rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1a3052;
            --primary-light: #1f3d66;
            --secondary: #c8963e;
            --secondary-light: #d9a84e;
            --accent: #e85d3a;
            --accent-light: #f06b4a;
            --bg: #f9f8f5;
            --bg-white: #ffffff;
            --bg-warm: #f5f2ec;
            --bg-dark: #141e2b;
            --text: #2a2a2a;
            --text-light: #5e5e5e;
            --text-lighter: #8a8a8a;
            --text-on-dark: #e8e8e8;
            --border: #e0ded8;
            --border-light: #eeebe5;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            color: var(--text);
            background-color: var(--bg);
            line-height: 1.7;
            font-size: 1rem;
            overflow-x: hidden;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus {
            outline: 2px solid var(--secondary);
            outline-offset: 3px;
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }
        button:focus {
            outline: 2px solid var(--secondary);
            outline-offset: 3px;
        }

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

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-top: 0;
        }

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

        /* ========== HEADER ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--secondary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.15rem;
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo-text {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo-text a {
            color: inherit;
            text-decoration: none;
        }
        .logo-text a:hover {
            color: var(--secondary);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 14px;
            border-radius: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(26, 48, 82, 0.04);
        }
        .nav-main a.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(26, 48, 82, 0.06);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2.5px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .nav-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.7rem;
            padding: 2px 7px;
            border-radius: 10px;
            font-weight: 600;
            letter-spacing: 0.5px;
            line-height: 1;
            animation: badgePulse 2s ease-in-out infinite;
        }
        @keyframes badgePulse {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.08);
            }
        }
        .nav-cta-btn {
            background: var(--secondary) !important;
            color: #fff !important;
            font-weight: 600 !important;
            padding: 9px 18px !important;
            border-radius: 20px !important;
            transition: all var(--transition) !important;
            margin-left: 6px;
        }
        .nav-cta-btn:hover {
            background: var(--secondary-light) !important;
            color: #fff !important;
            box-shadow: 0 4px 14px rgba(200, 150, 62, 0.35);
            transform: translateY(-1px);
        }
        .nav-cta-btn.active::after {
            display: none !important;
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .mobile-menu-toggle:hover {
            background: rgba(26, 48, 82, 0.06);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: 72px 0 64px;
            background: linear-gradient(170deg, #1a3052 0%, #1f3d66 35%, #1a3555 100%);
            overflow: hidden;
            color: #fff;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center 30%;
            opacity: 0.18;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb-row a {
            color: rgba(255, 255, 255, 0.85);
            text-decoration: none;
        }
        .breadcrumb-row a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .breadcrumb-row .sep {
            color: rgba(255, 255, 255, 0.45);
        }
        .banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
            line-height: 1.25;
        }
        .banner-content .banner-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .banner-stats-row {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .banner-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .banner-stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary-light);
            letter-spacing: -1px;
            line-height: 1;
        }
        .banner-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.3;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 60px 0;
        }
        .section-sm {
            padding: 40px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }
        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        /* ========== CARDS ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 24px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 14px;
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--border);
        }
        .card-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            flex-shrink: 0;
        }
        .card-icon-blue {
            background: #e8f0fa;
            color: var(--primary);
        }
        .card-icon-gold {
            background: #fdf3e2;
            color: var(--secondary);
        }
        .card-icon-accent {
            background: #fde8e2;
            color: var(--accent);
        }
        .card-icon-teal {
            background: #e2f5f2;
            color: #1a7a6d;
        }
        .card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin: 0;
        }
        .card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.65;
            margin: 0;
            flex-grow: 1;
        }
        .card .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--secondary);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition);
            margin-top: auto;
        }
        .card .card-link:hover {
            gap: 9px;
            color: var(--secondary-light);
        }
        .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 4px;
        }
        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 12px;
            background: #e8f0fa;
            color: var(--primary);
            align-self: flex-start;
        }
        .card-tag.hot {
            background: #fde8e2;
            color: var(--accent);
        }
        .card-tag.new {
            background: #e2f5f2;
            color: #1a7a6d;
        }

        /* ========== HIGHLIGHT ROW ========== */
        .highlight-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .highlight-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .highlight-img img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform var(--transition-slow);
        }
        .highlight-img:hover img {
            transform: scale(1.03);
        }
        .highlight-text h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .highlight-text p {
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }
        .highlight-list {
            list-style: none;
            padding: 0;
            margin: 0 0 16px 0;
        }
        .highlight-list li {
            padding: 6px 0 6px 26px;
            position: relative;
            color: var(--text);
            font-size: 0.9rem;
            line-height: 1.5;
        }
        .highlight-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 12px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--secondary);
        }

        /* ========== STAT CARDS ========== */
        .stat-cards-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .stat-card .stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -1px;
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-card .stat-unit {
            font-size: 1rem;
            font-weight: 600;
            color: var(--secondary);
        }
        .stat-card .stat-label {
            font-size: 0.85rem;
            color: var(--text-lighter);
            margin-top: 4px;
        }

        /* ========== TABLE LIST ========== */
        .info-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .info-table {
            width: 100%;
            border-collapse: collapse;
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
        }
        .info-table thead th {
            background: var(--primary);
            color: #fff;
            padding: 14px 18px;
            font-weight: 600;
            font-size: 0.9rem;
            text-align: left;
            white-space: nowrap;
        }
        .info-table tbody td {
            padding: 13px 18px;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9rem;
            color: var(--text);
            vertical-align: middle;
        }
        .info-table tbody tr:hover {
            background: #fafaf7;
        }
        .info-table tbody tr:last-child td {
            border-bottom: none;
        }
        .table-badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 10px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .table-badge.up {
            background: #e6f5ee;
            color: #1a7a4c;
        }
        .table-badge.down {
            background: #fde8e2;
            color: #c0392b;
        }
        .table-badge.neutral {
            background: #f5f2ec;
            color: #6b6b6b;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            line-height: 1.4;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #f5f2ec;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .faq-item.open .faq-question .faq-icon {
            background: var(--secondary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(160deg, #1a3052 0%, #1f3d66 50%, #1a3555 100%);
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            border-radius: 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            font-family: inherit;
            letter-spacing: 0.2px;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(200, 150, 62, 0.3);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            box-shadow: 0 8px 28px rgba(200, 150, 62, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .btn-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            padding: 48px 0 28px;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-logo {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }
        .footer-brand p {
            color: #aaa;
            line-height: 1.65;
            font-size: 0.85rem;
            margin: 0;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 7px;
        }
        .footer-col ul li a {
            color: #aaa;
            font-size: 0.85rem;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: var(--secondary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            color: #888;
            font-size: 0.8rem;
            line-height: 1.5;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header-inner {
                height: 56px;
            }
            .nav-main a {
                padding: 7px 10px;
                font-size: 0.82rem;
            }
            .nav-cta-btn {
                padding: 7px 14px !important;
                font-size: 0.82rem !important;
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-cards-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .highlight-row {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .page-banner {
                padding: 52px 0 48px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 52px;
                position: relative;
            }
            .nav-main {
                position: fixed;
                top: 52px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 16px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                display: none;
                z-index: 999;
                max-height: 70vh;
                overflow-y: auto;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main a {
                padding: 12px 14px;
                border-radius: 6px;
                font-size: 0.9rem;
                border-bottom: 1px solid var(--border-light);
            }
            .nav-main a:last-child {
                border-bottom: none;
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-cta-btn {
                margin-left: 0;
                text-align: center;
                justify-content: center;
                margin-top: 6px;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .card-grid-3,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stat-cards-row {
                grid-template-columns: 1fr 1fr;
            }
            .banner-content h1 {
                font-size: 1.6rem;
            }
            .banner-content .banner-sub {
                font-size: 0.95rem;
            }
            .banner-stats-row {
                gap: 16px;
            }
            .banner-stat-num {
                font-size: 1.5rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .highlight-row {
                grid-template-columns: 1fr;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-banner {
                padding: 40px 0 36px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .banner-content h1 {
                font-size: 1.35rem;
            }
            .banner-stats-row {
                flex-direction: column;
                gap: 10px;
            }
            .stat-cards-row {
                grid-template-columns: 1fr;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .card {
                padding: 20px 16px;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
            }
            .info-table thead th,
            .info-table tbody td {
                padding: 10px 12px;
                font-size: 0.78rem;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #1A3350;
            --color-primary-dark: #0F2440;
            --color-accent: #C8934D;
            --color-accent-light: #D4A96A;
            --color-accent-dark: #A67735;
            --color-bg: #F6F7FA;
            --color-white: #FFFFFF;
            --color-text: #2C3E50;
            --color-text-light: #5A6C7D;
            --color-text-muted: #8B9AAB;
            --color-border: #E2E7ED;
            --color-border-light: #EEF1F5;
            --color-card-bg: #FFFFFF;
            --color-footer-bg: #0F2440;
            --color-footer-text: #BCC7D4;
            --color-tag-bg: #FFF8EE;
            --color-tag-text: #C8934D;
            --color-badge: #E74C3C;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.40s ease;
            --font-heading: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --max-width: 1240px;
            --nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

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

        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        button {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            outline: none;
            transition: all var(--transition-normal);
        }

        button:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        input {
            font-family: var(--font-body);
        }

        .grid-container {
            max-width: var(--max-width);
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (max-width: 640px) {
            .grid-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent);
            font-size: 1.1rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .nav-main a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 15px;
            border-radius: var(--radius-sm);
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--color-text);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-main a:hover {
            color: var(--color-accent-dark);
            background: #FDF8F1;
        }

        .nav-main a.active {
            color: var(--color-accent-dark);
            background: #FDF5EC;
            font-weight: 600;
        }

        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 15px;
            right: 15px;
            height: 2.5px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .nav-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--color-badge);
            color: #fff;
            font-size: 0.68rem;
            font-weight: 700;
            padding: 2px 7px;
            border-radius: 10px;
            line-height: 1;
            letter-spacing: 0.5px;
            animation: badgePulse 2.2s ease-in-out infinite;
        }

        @keyframes badgePulse {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.12);
            }
        }

        .nav-cta-btn {
            background: var(--color-accent) !important;
            color: #fff !important;
            font-weight: 600 !important;
            padding: 9px 18px !important;
            border-radius: 22px !important;
            margin-left: 8px;
            transition: all var(--transition-normal) !important;
            box-shadow: 0 2px 8px rgba(200, 147, 61, 0.35);
        }

        .nav-cta-btn:hover {
            background: var(--color-accent-dark) !important;
            color: #fff !important;
            box-shadow: 0 4px 16px rgba(200, 147, 61, 0.50);
            transform: translateY(-1px);
        }

        .nav-cta-btn.active::after {
            display: none;
        }

        .nav-cta-btn i {
            font-size: 0.85rem;
        }

        /* Mobile nav toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--color-primary);
            padding: 8px;
            cursor: pointer;
            line-height: 1;
        }

        @media (max-width: 1024px) {
            .nav-main a {
                padding: 7px 10px;
                font-size: 0.85rem;
            }
            .nav-cta-btn {
                padding: 7px 13px !important;
                font-size: 0.82rem !important;
                margin-left: 4px;
            }
            .nav-badge {
                font-size: 0.62rem;
                padding: 1.5px 5px;
            }
        }

        @media (max-width: 860px) {
            .nav-toggle {
                display: block;
            }
            .nav-main {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: var(--color-white);
                border-bottom: 2px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                padding: 12px 16px;
                gap: 2px;
                z-index: 999;
            }
            .nav-main.nav-open {
                display: flex;
            }
            .nav-main a {
                width: 100%;
                padding: 11px 16px;
                font-size: 0.95rem;
                border-radius: var(--radius-sm);
            }
            .nav-cta-btn {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                justify-content: center;
                border-radius: var(--radius-sm) !important;
            }
            .header-inner {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: 56px 0;
        }
        .section-sm {
            padding: 36px 0;
        }
        .section-lg {
            padding: 72px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 50px 0;
            }
            .section-sm {
                padding: 28px 0;
            }
        }

        /* ========== HERO / BANNER ========== */
        .page-banner {
            position: relative;
            padding: 80px 0 70px;
            background: var(--color-primary);
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 51, 80, 0.88) 0%, rgba(15, 36, 64, 0.78) 100%);
            z-index: 1;
        }

        .page-banner .grid-container {
            position: relative;
            z-index: 2;
        }

        .banner-content {
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .banner-label {
            display: inline-block;
            background: rgba(255, 255, 255, 0.13);
            color: #F0E0C8;
            font-size: 0.85rem;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 20px;
            letter-spacing: 0.8px;
            margin-bottom: 18px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.18);
        }

        .banner-content h1 {
            font-family: var(--font-heading);
            font-size: 2.6rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 16px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }

        .banner-content .banner-subtitle {
            font-size: 1.15rem;
            color: #D4DEE8;
            line-height: 1.7;
            margin: 0 0 28px;
        }

        .banner-stats-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 10px;
        }

        .banner-stat {
            text-align: center;
            color: #fff;
        }

        .banner-stat .stat-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-accent-light);
            line-height: 1;
        }

        .banner-stat .stat-label {
            font-size: 0.85rem;
            color: #C4D1DE;
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 56px 0 48px;
            }
            .banner-content h1 {
                font-size: 1.8rem;
            }
            .banner-content .banner-subtitle {
                font-size: 1rem;
            }
            .banner-stats-row {
                gap: 24px;
            }
            .banner-stat .stat-num {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.45rem;
            }
            .banner-stats-row {
                gap: 16px;
            }
            .banner-stat .stat-num {
                font-size: 1.35rem;
            }
        }

        /* ========== CARDS ========== */
        .card-tool {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            padding: 28px 24px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .card-tool:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: #E8D5B8;
        }

        .card-tool .tool-icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .icon-blue {
            background: #EBF3FB;
            color: #2E6FB5;
        }
        .icon-gold {
            background: #FDF5EC;
            color: #C8934D;
        }
        .icon-green {
            background: #EDF7F0;
            color: #3B8C5A;
        }
        .icon-purple {
            background: #F4EDFA;
            color: #6E4B9B;
        }

        .card-tool h3 {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--color-primary);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .card-tool p {
            font-size: 0.925rem;
            color: var(--color-text-light);
            margin: 0 0 16px;
            line-height: 1.65;
            flex-grow: 1;
        }

        .card-tool .tool-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            transition: gap var(--transition-fast);
        }

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

        .card-tool .tool-link i {
            font-size: 0.75rem;
            transition: transform var(--transition-fast);
        }

        .card-tool .tool-link:hover i {
            transform: translateX(3px);
        }

        /* Card with image */
        .card-image-top {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            overflow: hidden;
            height: 180px;
            object-fit: cover;
            width: 100%;
        }

        @media (max-width: 768px) {
            .card-image-top {
                height: 160px;
            }
        }

        /* ========== STAT BLOCK ========== */
        .stat-block-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-block-item {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
        }

        .stat-block-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .stat-block-item .stat-icon {
            font-size: 1.8rem;
            color: var(--color-accent);
            margin-bottom: 10px;
        }

        .stat-block-item .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1;
        }

        .stat-block-item .stat-desc {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 8px;
        }

        @media (max-width: 768px) {
            .stat-block-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-block-item .stat-value {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .stat-block-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-block-item {
                padding: 20px 14px;
            }
            .stat-block-item .stat-value {
                font-size: 1.3rem;
            }
        }

        /* ========== FEATURE ROW ========== */
        .feature-row {
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }

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

        .feature-row .feature-img {
            flex: 1;
            min-width: 280px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .feature-row .feature-img img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-lg);
        }

        .feature-row .feature-text {
            flex: 1;
            min-width: 280px;
        }

        .feature-row .feature-text h2 {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 12px;
        }

        .feature-row .feature-text p {
            font-size: 0.975rem;
            color: var(--color-text-light);
            line-height: 1.75;
            margin: 0 0 16px;
        }

        .feature-row .feature-text .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .feature-row .feature-text .feature-list li {
            padding: 6px 0 6px 24px;
            position: relative;
            font-size: 0.9rem;
            color: var(--color-text);
        }

        .feature-row .feature-text .feature-list li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 13px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
        }

        @media (max-width: 768px) {
            .feature-row {
                gap: 28px;
                flex-direction: column;
            }
            .feature-row.reverse {
                flex-direction: column;
            }
            .feature-row .feature-text h2 {
                font-size: 1.35rem;
            }
        }

        /* ========== STEPS / PROCESS ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: 32px 20px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: all var(--transition-normal);
        }

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

        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            position: relative;
            z-index: 2;
        }

        .step-card h4 {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            margin: 0 0 8px;
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--color-text-light);
            margin: 0;
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .step-card {
                padding: 24px 16px 20px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #D8CCB4;
        }

        .faq-question {
            width: 100%;
            background: none;
            text-align: left;
            padding: 18px 20px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            border: none;
            outline: none;
            transition: color var(--transition-fast);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--color-accent);
            transition: transform var(--transition-normal);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
        }

        .faq-item.faq-open .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 20px 20px;
            font-size: 0.925rem;
            color: var(--color-text-light);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--color-primary);
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 64px 0;
            text-align: center;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 51, 80, 0.9) 0%, rgba(15, 36, 64, 0.85) 100%);
            z-index: 1;
        }

        .cta-section .grid-container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-family: var(--font-heading);
            font-size: 1.9rem;
            font-weight: 700;
            color: #FFFFFF;
            margin: 0 0 12px;
        }

        .cta-section p {
            font-size: 1rem;
            color: #D4DEE8;
            margin: 0 0 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-primary-lg {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 28px;
            transition: all var(--transition-normal);
            box-shadow: 0 4px 18px rgba(200, 147, 61, 0.45);
            border: none;
            cursor: pointer;
        }

        .btn-primary-lg:hover {
            background: var(--color-accent-dark);
            box-shadow: 0 6px 24px rgba(200, 147, 61, 0.60);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 500;
            font-size: 1rem;
            padding: 13px 30px;
            border-radius: 28px;
            border: 2px solid rgba(255, 255, 255, 0.55);
            transition: all var(--transition-normal);
            margin-left: 12px;
        }

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

        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .btn-primary-lg,
            .btn-outline-light {
                display: block;
                width: 100%;
                max-width: 280px;
                margin: 0 auto 12px;
                justify-content: center;
                text-align: center;
            }
            .btn-outline-light {
                margin-left: auto;
            }
        }

        /* ========== SECTION HEADINGS ========== */
        .section-heading {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-heading .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 1.5px;
            text-transform: uppercase;
            margin-bottom: 8px;
            background: var(--color-tag-bg);
            padding: 4px 14px;
            border-radius: 12px;
        }

        .section-heading h2 {
            font-family: var(--font-heading);
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 8px;
        }

        .section-heading p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            max-width: 600px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section-heading h2 {
                font-size: 1.4rem;
            }
            .section-heading {
                margin-bottom: 28px;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--color-footer-bg);
            color: var(--color-footer-text);
            padding: 48px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            font-family: var(--font-heading);
        }

        .footer-brand p {
            font-size: 0.875rem;
            color: var(--color-footer-text);
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.4px;
        }

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

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

        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--color-footer-text);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            text-align: center;
            padding: 20px 0;
            font-size: 0.8rem;
            color: #8899AB;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand {
                grid-column: auto;
            }
        }

        /* ========== UTILITY ========== */
        .text-accent {
            color: var(--color-accent);
        }
        .text-primary {
            color: var(--color-primary);
        }
        .mt-0 {
            margin-top: 0;
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .text-center {
            text-align: center;
        }

        /* ========== TOOL SHOWCASE GRID ========== */
        .tool-showcase-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        @media (max-width: 768px) {
            .tool-showcase-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ========== TAG / BADGE ========== */
        .tag {
            display: inline-block;
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            font-size: 0.78rem;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 12px;
            margin-right: 6px;
            margin-bottom: 4px;
        }

        /* ========== OVERRIDE FOUNDATION ========== */
        .grid-container {
            max-width: var(--max-width);
        }
        button,
        .button {
            font-family: var(--font-body);
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
        }

        /* Smooth reveal */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

/* roulang page: category5 */
:root {
            --primary: #1B3A5C;
            --primary-light: #1e4d7a;
            --primary-dark: #0f2540;
            --accent: #C8963E;
            --accent-light: #d9af5f;
            --accent-glow: #e8c97a;
            --bg-white: #FFFFFF;
            --bg-light: #F5F6F8;
            --bg-slate: #eaecf0;
            --bg-dark: #0f1a2e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4f5c;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --text-on-dark: #e8eaef;
            --border: #e5e7eb;
            --border-light: #f0f1f3;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.14);
            --shadow-accent: 0 4px 16px rgba(200, 150, 62, 0.25);
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --container-pad: 1.25rem;
            --nav-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-white);
            margin: 0;
            padding: 0;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 3px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }

        button,
        input {
            font-family: inherit;
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(27, 58, 92, 0.25);
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .logo-text .accent-dot {
            color: var(--accent);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 8px 14px;
            border-radius: 22px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.01em;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(27, 58, 92, 0.05);
        }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(27, 58, 92, 0.3);
        }
        .nav-main a.active:hover {
            background: var(--primary-light);
            color: #fff;
        }
        .nav-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #e53e3e;
            color: #fff;
            font-size: 0.68rem;
            font-weight: 700;
            border-radius: 10px;
            padding: 2px 7px;
            line-height: 1.2;
            animation: pulseBadge 2.4s ease-in-out infinite;
            letter-spacing: 0;
        }
        @keyframes pulseBadge {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.12);
            }
        }
        .nav-cta-btn {
            background: var(--accent) !important;
            color: #fff !important;
            font-weight: 600 !important;
            border-radius: 22px !important;
            padding: 8px 18px !important;
            box-shadow: var(--shadow-accent);
            transition: all var(--transition) !important;
            letter-spacing: 0.02em;
        }
        .nav-cta-btn:hover {
            background: var(--accent-light) !important;
            box-shadow: 0 6px 22px rgba(200, 150, 62, 0.38) !important;
            transform: translateY(-1px);
            color: #fff !important;
        }
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu-toggle:hover {
            background: rgba(27, 58, 92, 0.06);
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 26, 46, 0.88) 0%, rgba(27, 58, 92, 0.82) 50%, rgba(15, 37, 64, 0.9) 100%),
                url('assets/images/backpic/back-3.webp') center center / cover no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
            text-align: center;
            color: #fff;
            padding: 3rem 0;
            position: relative;
            overflow: hidden;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, rgba(255, 255, 255, 0.06) 0%, transparent 100%);
            pointer-events: none;
        }
        .banner-accent-line {
            display: block;
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            margin: 0 auto 1rem;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 0.6rem;
            color: #fff;
        }
        .page-banner .banner-subtitle {
            font-size: 1.12rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 1.5rem;
            line-height: 1.6;
        }
        .banner-search-wrap {
            display: flex;
            max-width: 460px;
            margin: 0 auto;
            gap: 0;
            border-radius: 28px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .banner-search-wrap input {
            flex: 1;
            border: none;
            padding: 13px 20px;
            font-size: 0.95rem;
            background: #fff;
            color: var(--text-primary);
            outline: none;
        }
        .banner-search-wrap button {
            background: var(--accent);
            border: none;
            color: #fff;
            padding: 0 22px;
            font-size: 1rem;
            cursor: pointer;
            transition: background var(--transition);
            font-weight: 600;
            white-space: nowrap;
        }
        .banner-search-wrap button:hover {
            background: var(--accent-light);
        }
        .banner-stats-row {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            margin-top: 1.8rem;
            flex-wrap: wrap;
        }
        .banner-stat-item {
            text-align: center;
            color: rgba(255, 255, 255, 0.9);
        }
        .banner-stat-num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--accent-glow);
            display: block;
        }
        .banner-stat-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.03em;
        }

        /* Section common */
        .section {
            padding: 3.5rem 0;
        }
        .section-sm {
            padding: 2.5rem 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .section-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.4rem;
            letter-spacing: 0.02em;
        }
        .section-header .section-line {
            display: block;
            width: 44px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            margin: 0.6rem auto 0.8rem;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 540px;
            margin: 0 auto;
        }

        /* Cards */
        .card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            overflow: hidden;
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: #dde1e7;
        }
        .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--bg-slate);
        }
        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
            border-radius: 0;
        }
        .card:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 0.74rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 14px;
            z-index: 2;
            letter-spacing: 0.02em;
        }
        .card-tag.hot {
            background: #e53e3e;
        }
        .card-tag.new {
            background: #38a169;
        }
        .card-body {
            padding: 1.2rem 1.3rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body .card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0.4rem;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .card-body h3 {
            font-size: 1.08rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.45;
            flex: 1;
        }
        .card-body h3 a {
            color: inherit;
        }
        .card-body h3 a:hover {
            color: var(--primary-light);
        }
        .card-body p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            margin-bottom: 0.8rem;
            line-height: 1.55;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 0.6rem;
            border-top: 1px solid var(--border-light);
        }
        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Featured article */
        .featured-article {
            background: #fff;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            display: grid;
            grid-template-columns: 1fr 1fr;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .featured-article:hover {
            box-shadow: var(--shadow-lg);
        }
        .featured-img {
            aspect-ratio: 4/3;
            overflow: hidden;
            background: var(--bg-slate);
        }
        .featured-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
            border-radius: 0;
        }
        .featured-article:hover .featured-img img {
            transform: scale(1.05);
        }
        .featured-content {
            padding: 2rem 2rem 1.8rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-content .featured-tag {
            display: inline-block;
            background: #e53e3e;
            color: #fff;
            font-size: 0.76rem;
            font-weight: 600;
            padding: 4px 11px;
            border-radius: 14px;
            margin-bottom: 0.8rem;
            width: fit-content;
            letter-spacing: 0.02em;
        }
        .featured-content h2 {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.6rem;
            line-height: 1.4;
        }
        .featured-content p {
            color: var(--text-secondary);
            font-size: 0.94rem;
            line-height: 1.6;
            margin-bottom: 1rem;
        }
        .featured-content .featured-date {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            letter-spacing: 0.02em;
            white-space: nowrap;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 3px 12px rgba(27, 58, 92, 0.25);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            box-shadow: 0 6px 20px rgba(27, 58, 92, 0.35);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: var(--shadow-accent);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            box-shadow: 0 6px 22px rgba(200, 150, 62, 0.4);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 0.82rem;
            border-radius: 20px;
        }

        /* News list */
        .news-list-item {
            display: flex;
            gap: 1.2rem;
            padding: 1.1rem 0;
            border-bottom: 1px solid var(--border-light);
            align-items: flex-start;
            transition: all var(--transition);
            cursor: pointer;
        }
        .news-list-item:hover {
            background: rgba(245, 246, 248, 0.6);
            padding-left: 0.6rem;
            border-radius: var(--radius);
        }
        .news-list-thumb {
            width: 140px;
            flex-shrink: 0;
            aspect-ratio: 16/11;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-slate);
        }
        .news-list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius);
            transition: transform 0.35s ease;
        }
        .news-list-item:hover .news-list-thumb img {
            transform: scale(1.05);
        }
        .news-list-content {
            flex: 1;
        }
        .news-list-content h3 {
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
            line-height: 1.4;
        }
        .news-list-content p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-bottom: 0.4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.5;
        }
        .news-list-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 1rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .news-list-meta .tag-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
        }

        /* Category browse cards */
        .cat-browse-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
            height: 100%;
        }
        .cat-browse-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: #d0d4db;
        }
        .cat-browse-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            color: #fff;
            font-size: 1.5rem;
        }
        .cat-browse-card h4 {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 0.3rem;
        }
        .cat-browse-card p {
            font-size: 0.83rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* Data strip */
        .data-strip {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-xl);
            padding: 2.2rem 2rem;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            text-align: center;
            color: #fff;
        }
        .data-strip-item .ds-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent-glow);
            display: block;
            line-height: 1.2;
        }
        .data-strip-item .ds-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            letter-spacing: 0.03em;
            margin-top: 0.3rem;
        }

        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, rgba(27, 58, 92, 0.95) 0%, rgba(15, 37, 64, 0.97) 100%),
                url('assets/images/backpic/back-2.webp') center center / cover no-repeat;
            border-radius: var(--radius-xl);
            padding: 3rem 2.5rem;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
            color: #fff;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 500px;
            margin: 0 auto 1.5rem;
            font-size: 0.95rem;
        }
        .cta-input-group {
            display: flex;
            max-width: 420px;
            margin: 0 auto;
            border-radius: 28px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .cta-input-group input {
            flex: 1;
            border: none;
            padding: 13px 18px;
            font-size: 0.92rem;
            outline: none;
        }
        .cta-input-group button {
            background: var(--accent);
            border: none;
            color: #fff;
            padding: 0 24px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
            white-space: nowrap;
            font-size: 0.92rem;
        }
        .cta-input-group button:hover {
            background: var(--accent-light);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.6rem;
            letter-spacing: 0.02em;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.85rem;
            line-height: 1.6;
        }
        .footer-col h5 {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 0.8rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.45rem;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.84rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.45);
            line-height: 1.6;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-main a {
                padding: 7px 10px;
                font-size: 0.84rem;
            }
            .nav-main {
                gap: 2px;
            }
            .featured-article {
                grid-template-columns: 1fr;
            }
            .featured-img {
                aspect-ratio: 16/9;
                max-height: 300px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                gap: 0;
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 4px;
                scrollbar-width: none;
                mask-image: linear-gradient(to right, #000 92%, transparent 100%);
                -webkit-mask-image: linear-gradient(to right, #000 92%, transparent 100%);
            }
            .nav-main::-webkit-scrollbar {
                display: none;
            }
            .nav-main a {
                padding: 7px 11px;
                font-size: 0.8rem;
                flex-shrink: 0;
            }
            .nav-cta-btn {
                padding: 7px 13px !important;
                font-size: 0.78rem !important;
            }
            .site-header {
                height: auto;
                min-height: 56px;
                padding: 8px 0;
            }
            .header-inner {
                flex-wrap: wrap;
                gap: 8px;
            }
            .page-banner {
                min-height: 260px;
                padding: 2rem 0;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner .banner-subtitle {
                font-size: 0.92rem;
            }
            .banner-stats-row {
                gap: 1.5rem;
            }
            .banner-stat-num {
                font-size: 1.4rem;
            }
            .section {
                padding: 2.5rem 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .featured-content {
                padding: 1.3rem;
            }
            .featured-content h2 {
                font-size: 1.25rem;
            }
            .news-list-item {
                flex-direction: column;
                gap: 0.8rem;
            }
            .news-list-thumb {
                width: 100%;
                aspect-ratio: 16/9;
                max-height: 180px;
            }
            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                padding: 1.5rem 1rem;
                gap: 1rem;
            }
            .data-strip-item .ds-num {
                font-size: 1.6rem;
            }
            .cta-section {
                padding: 2rem 1.2rem;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .nav-main a {
                padding: 6px 9px;
                font-size: 0.73rem;
                border-radius: 16px;
            }
            .nav-cta-btn {
                padding: 6px 10px !important;
                font-size: 0.7rem !important;
            }
            .logo-text {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .banner-subtitle {
                font-size: 0.82rem;
            }
            .banner-search-wrap input {
                padding: 10px 14px;
                font-size: 0.82rem;
            }
            .banner-search-wrap button {
                padding: 0 14px;
                font-size: 0.82rem;
            }
            .banner-stats-row {
                gap: 1rem;
                flex-wrap: wrap;
            }
            .banner-stat-num {
                font-size: 1.2rem;
            }
            .banner-stat-label {
                font-size: 0.7rem;
            }
            .data-strip {
                grid-template-columns: 1fr 1fr;
                padding: 1.2rem 0.8rem;
                gap: 0.8rem;
                border-radius: var(--radius);
            }
            .data-strip-item .ds-num {
                font-size: 1.3rem;
            }
            .data-strip-item .ds-label {
                font-size: 0.72rem;
            }
            .cat-browse-card {
                padding: 1.2rem 1rem;
            }
            .cat-browse-icon {
                width: 42px;
                height: 42px;
                font-size: 1.2rem;
            }
            .cta-input-group {
                flex-direction: column;
                border-radius: var(--radius);
                overflow: visible;
                gap: 8px;
            }
            .cta-input-group input {
                border-radius: 20px;
                padding: 11px 16px;
            }
            .cta-input-group button {
                border-radius: 20px;
                padding: 11px 16px;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
        }