/* roulang page: index */
:root {
            --color-primary: #1a365d;
            --color-primary-dark: #0f2440;
            --color-primary-light: #2c5282;
            --color-accent: #c8903e;
            --color-accent-light: #d4a855;
            --color-accent-dark: #a6762d;
            --color-bg: #f7f8fa;
            --color-white: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #5a6c7d;
            --color-text-light: #8899aa;
            --color-border: #e2e8f0;
            --color-border-light: #edf2f7;
            --color-card-bg: #ffffff;
            --color-success: #38a169;
            --color-highlight: #fffdf5;
            --radius-xs: 6px;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 24px;
            --spacing-lg: 40px;
            --spacing-xl: 60px;
            --spacing-2xl: 80px;
            --spacing-3xl: 100px;
            --max-width: 1200px;
            --nav-height: 72px;
            --transition-fast: 0.18s ease;
            --transition: 0.3s ease;
            --transition-slow: 0.5s ease;
        }

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

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

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 var(--spacing-sm);
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.96);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

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

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--color-primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--color-primary-light);
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .nav-desktop a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-desktop a:hover {
            color: var(--color-primary);
            background: #f1f5f9;
        }

        .nav-desktop a.active {
            color: var(--color-primary);
            font-weight: 600;
            background: transparent;
        }

        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--color-accent);
        }

        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            transition: background var(--transition-fast);
            z-index: 1001;
        }

        .mobile-menu-toggle:hover {
            background: #f1f5f9;
        }

        .mobile-menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-text);
            transition: all var(--transition);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-desktop {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: var(--color-white);
                flex-direction: column;
                padding: 90px 24px 40px;
                gap: 6px;
                box-shadow: var(--shadow-xl);
                transition: right var(--transition);
                z-index: 999;
                overflow-y: auto;
            }
            .nav-desktop.open {
                right: 0;
            }
            .nav-desktop a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-desktop a.active::after {
                display: none;
            }
            .nav-desktop a.active {
                background: #f0f4f8;
                border-radius: var(--radius-sm);
            }
            .mobile-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.4);
                z-index: 998;
            }
            .mobile-overlay.show {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 var(--spacing-sm);
            }
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
            .nav-desktop {
                width: 260px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: var(--color-primary-dark);
            overflow: hidden;
            isolation: isolate;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.35;
            filter: brightness(0.7);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(180deg, rgba(15, 36, 64, 0.55) 0%, rgba(26, 54, 93, 0.8) 60%, rgba(15, 36, 64, 0.92) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            padding: var(--spacing-3xl) 0;
            color: #fff;
            max-width: 780px;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: var(--spacing-md);
            backdrop-filter: blur(10px);
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: var(--spacing-sm);
        }

        .hero h1 .accent {
            color: var(--color-accent-light);
            position: relative;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            font-weight: 400;
            line-height: 1.6;
            opacity: 0.9;
            margin-bottom: var(--spacing-lg);
            max-width: 600px;
        }

        .hero-cta-group {
            display: flex;
            gap: var(--spacing-sm);
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            letter-spacing: 0.01em;
            white-space: nowrap;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(200, 144, 62, 0.35);
        }
        .btn-primary:hover {
            background: var(--color-accent-light);
            box-shadow: 0 6px 22px rgba(200, 144, 62, 0.5);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(200, 144, 62, 0.3);
        }
        .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);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 0.85rem;
            border-radius: 50px;
        }
        .btn-text {
            padding: 8px 16px;
            font-weight: 600;
            color: var(--color-primary);
            gap: 6px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .btn-text:hover {
            background: #f1f5f9;
            color: var(--color-primary-light);
        }
        .btn-text .arrow {
            transition: transform var(--transition-fast);
        }
        .btn-text:hover .arrow {
            transform: translateX(4px);
        }

        @media (max-width: 1024px) {
            .hero {
                min-height: 540px;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 480px;
            }
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero-subtitle {
                font-size: 1rem;
                margin-bottom: var(--spacing-md);
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-content {
                padding: var(--spacing-2xl) 0;
            }
        }

        @media (max-width: 520px) {
            .hero {
                min-height: 420px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-badge {
                font-size: 0.78rem;
                padding: 5px 12px;
            }
        }

        /* ===== Sections ===== */
        .section {
            padding: var(--spacing-2xl) 0;
        }

        .section-sm {
            padding: var(--spacing-xl) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
            margin-bottom: var(--spacing-xs);
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: var(--spacing-xs);
        }

        .section-header p {
            color: var(--color-text-secondary);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-xl) 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
        }

        /* ===== Stats Grid ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        .stat-card {
            background: var(--color-white);
            border-radius: var(--radius);
            padding: var(--spacing-lg) var(--spacing-md);
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 4px;
            border-radius: 0 0 4px 4px;
            background: var(--color-accent);
            transition: width var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .stat-card:hover::before {
            width: 60px;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .stat-card {
                padding: var(--spacing-md) var(--spacing-sm);
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .stat-label {
                font-size: 0.8rem;
            }
        }

        /* ===== Cards Grid ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .cards-grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-md);
        }

        .feature-card {
            background: var(--color-white);
            border-radius: var(--radius);
            padding: var(--spacing-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

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

        .feature-card .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
            background: #f0f4f8;
            color: var(--color-primary);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cards-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .cards-grid,
            .cards-grid-4 {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: var(--spacing-md);
            }
        }

        /* ===== Brand Story ===== */
        .brand-story-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }

        .brand-story-image {
            width: 100%;
            height: 100%;
            min-height: 380px;
            object-fit: cover;
            border-radius: var(--radius-lg) 0 0 var(--radius-lg);
        }

        .brand-story-text {
            padding: var(--spacing-xl);
        }

        .brand-story-text h2 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .brand-story-text p {
            color: var(--color-text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
            margin-bottom: var(--spacing-sm);
        }

        @media (max-width: 768px) {
            .brand-story-block {
                grid-template-columns: 1fr;
            }
            .brand-story-image {
                min-height: 250px;
                border-radius: var(--radius-lg) var(--radius-lg) 0 0;
            }
            .brand-story-text {
                padding: var(--spacing-md);
            }
            .brand-story-text h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== Category Grid ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: var(--spacing-md);
        }

        .category-card {
            background: var(--color-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            text-align: center;
        }

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

        .category-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .category-card-body {
            padding: var(--spacing-sm);
        }

        .category-card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .category-card-body p {
            font-size: 0.8rem;
            color: var(--color-text-light);
        }

        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-card img {
                height: 130px;
            }
        }

        @media (max-width: 520px) {
            .category-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-sm);
            }
            .category-card img {
                height: 110px;
            }
            .category-card-body h4 {
                font-size: 0.9rem;
            }
        }

        /* ===== Events / News List ===== */
        .events-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
        }

        .event-card {
            background: var(--color-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .event-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .event-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .event-card-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .event-card-body .event-date {
            font-size: 0.8rem;
            color: var(--color-accent);
            font-weight: 600;
            letter-spacing: 0.03em;
        }

        .event-card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
        }

        .event-card-body p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        @media (max-width: 768px) {
            .events-list {
                grid-template-columns: 1fr;
            }
            .event-card img {
                height: 180px;
            }
        }

        /* ===== News List ===== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }

        .news-item {
            background: var(--color-white);
            border-radius: var(--radius);
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            cursor: pointer;
        }

        .news-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--color-border);
            transform: translateX(2px);
        }

        .news-item .news-date-badge {
            flex-shrink: 0;
            background: #f0f4f8;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            text-align: center;
            min-width: 70px;
        }

        .news-item .news-date-badge .day {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1;
        }
        .news-item .news-date-badge .month {
            font-size: 0.75rem;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

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

        .news-item .news-info h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-item .news-info p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        @media (max-width: 520px) {
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                padding: var(--spacing-sm);
                gap: var(--spacing-xs);
            }
            .news-item .news-date-badge {
                display: flex;
                gap: 6px;
                align-items: baseline;
                padding: 6px 10px;
                min-width: auto;
            }
            .news-item .news-date-badge .day {
                font-size: 1.1rem;
            }
            .news-item .news-info h4 {
                white-space: normal;
                font-size: 0.9rem;
            }
        }

        /* ===== Partners ===== */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            align-items: center;
            gap: var(--spacing-xl);
            padding: var(--spacing-lg) 0;
        }

        .partner-logo-placeholder {
            width: 100px;
            height: 50px;
            background: #f0f4f8;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--color-text-light);
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
        }

        .partner-logo-placeholder:hover {
            background: #e2e8f0;
            color: var(--color-text);
        }

        @media (max-width: 520px) {
            .partners-row {
                gap: var(--spacing-md);
            }
            .partner-logo-placeholder {
                width: 75px;
                height: 40px;
                font-size: 0.7rem;
            }
        }

        /* ===== Testimonials ===== */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-md);
        }

        .testimonial-card {
            background: var(--color-white);
            border-radius: var(--radius);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            position: relative;
        }

        .testimonial-card::before {
            content: '\201C';
            position: absolute;
            top: 16px;
            left: 20px;
            font-size: 3rem;
            color: var(--color-accent-light);
            opacity: 0.5;
            line-height: 0.6;
            pointer-events: none;
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .testimonial-card p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: var(--spacing-sm);
            padding-top: 18px;
        }

        .testimonial-card .author {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-text);
        }

        .testimonial-card .author-role {
            font-size: 0.78rem;
            color: var(--color-text-light);
        }

        @media (max-width: 1024px) {
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-card {
                padding: var(--spacing-md);
            }
        }

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

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

        .faq-item:hover {
            border-color: var(--color-border);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-md) var(--spacing-lg);
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-sm);
            transition: background var(--transition-fast);
            cursor: pointer;
        }

        .faq-question:hover {
            background: #fafbfc;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #f0f4f8;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: all var(--transition);
            font-weight: 700;
            color: var(--color-primary);
        }

        .faq-item.open .faq-icon {
            background: var(--color-primary);
            color: #fff;
            transform: rotate(45deg);
        }

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

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 var(--spacing-lg) var(--spacing-md);
        }

        .faq-answer p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: var(--spacing-sm);
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 var(--spacing-sm);
            }
            .faq-item.open .faq-answer {
                padding: 0 var(--spacing-sm) var(--spacing-sm);
            }
            .faq-answer p {
                font-size: 0.85rem;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary);
            color: #fff;
            text-align: center;
            padding: var(--spacing-2xl) var(--spacing-md);
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
            isolation: isolate;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
        }

        .cta-section>* {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.9;
            margin-bottom: var(--spacing-lg);
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
        }

        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f1e2e;
            color: #cbd5e0;
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
        }

        .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);
            margin-bottom: var(--spacing-lg);
        }

        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
            font-size: 0.95rem;
            letter-spacing: 0.02em;
        }

        .footer-col p {
            font-size: 0.85rem;
            line-height: 1.7;
            opacity: 0.8;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: #cbd5e0;
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            font-size: 0.8rem;
            opacity: 0.7;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing-md);
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Utility ===== */
        .bg-white {
            background: var(--color-white);
        }
        .bg-light {
            background: #f8fafc;
        }
        .text-center {
            text-align: center;
        }
        .mt-lg {
            margin-top: var(--spacing-lg);
        }
        .mb-lg {
            margin-bottom: var(--spacing-lg);
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* Fade-in animation */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .animate-in-delay-1 {
            animation-delay: 0.1s;
            opacity: 0;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
            opacity: 0;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
            opacity: 0;
        }

/* roulang page: category1 */
:root {
            --primary: #0a1f35;
            --primary-light: #132d4a;
            --accent: #d4943a;
            --accent-hover: #b87a2e;
            --cta: #e05d2a;
            --cta-hover: #c44e20;
            --bg: #f8f9fb;
            --surface: #ffffff;
            --text: #1c1c1c;
            --text-secondary: #5a6070;
            --text-weak: #8b919e;
            --border: #e2e5ea;
            --border-light: #eef0f4;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(10, 31, 53, 0.06);
            --shadow: 0 4px 16px rgba(10, 31, 53, 0.08);
            --shadow-lg: 0 12px 32px rgba(10, 31, 53, 0.10);
            --shadow-xl: 0 20px 48px rgba(10, 31, 53, 0.14);
            --transition: 0.22s ease;
            --font-stack: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --max-width: 1260px;
            --header-height: 68px;
            --section-gap: 64px;
            --card-gap: 20px;
        }

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

        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);
            background: var(--bg);
            min-width: 320px;
        }

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

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

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

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: opacity var(--transition);
        }
        .logo-link:hover {
            opacity: 0.82;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-desktop a {
            display: inline-block;
            padding: 8px 15px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-desktop a:hover {
            color: var(--primary);
            background: rgba(10, 31, 53, 0.04);
        }
        .nav-desktop a.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(10, 31, 53, 0.06);
        }
        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 15px;
            right: 15px;
            height: 2.5px;
            background: var(--accent);
            border-radius: 3px;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-menu-toggle:hover {
            background: rgba(10, 31, 53, 0.05);
        }
        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 99;
            padding: 20px 24px;
            flex-direction: column;
            gap: 2px;
            overflow-y: auto;
            box-shadow: var(--shadow-lg);
        }
        .mobile-nav-panel.open {
            display: flex;
        }
        .mobile-nav-panel a {
            display: block;
            padding: 14px 16px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius);
            transition: all var(--transition);
        }
        .mobile-nav-panel a:hover,
        .mobile-nav-panel a.active {
            background: rgba(10, 31, 53, 0.06);
            color: var(--primary);
            font-weight: 600;
        }

        /* Breadcrumb */
        .breadcrumb-nav {
            padding: 14px 0;
            font-size: 0.85rem;
            color: var(--text-weak);
            display: flex;
            gap: 6px;
            align-items: center;
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .breadcrumb-nav .sep {
            color: var(--border);
            user-select: none;
        }
        .breadcrumb-nav .current {
            color: var(--text);
            font-weight: 500;
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            background: var(--primary-light) url('assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 340px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 31, 53, 0.82) 0%, rgba(10, 31, 53, 0.55) 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            padding-top: 36px;
            padding-bottom: 36px;
        }
        .page-banner .banner-tag {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.8px;
            margin-bottom: 16px;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .page-banner .banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 620px;
            line-height: 1.7;
        }

        /* Section */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            letter-spacing: 0.5px;
        }
        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto;
        }

        /* Subcategory Grid */
        .subcat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }
        .subcat-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-light);
        }
        .subcat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
            border-color: var(--border);
        }
        .subcat-card .card-img-wrap {
            height: 200px;
            overflow: hidden;
            position: relative;
            background: #eef1f5;
        }
        .subcat-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .subcat-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .subcat-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .subcat-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .subcat-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
        }
        .subcat-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 12px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent);
            transition: color var(--transition);
        }
        .subcat-card .card-link:hover {
            color: var(--accent-hover);
        }
        .subcat-card .card-link::after {
            content: '→';
            transition: transform var(--transition);
        }
        .subcat-card .card-link:hover::after {
            transform: translateX(3px);
        }

        /* Product highlight */
        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }
        .highlight-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .highlight-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--border);
            transform: translateY(-2px);
        }
        .highlight-card .hc-img {
            height: 180px;
            background: #f4f5f7;
            overflow: hidden;
        }
        .highlight-card .hc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .highlight-card:hover .hc-img img {
            transform: scale(1.04);
        }
        .highlight-card .hc-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .highlight-card .hc-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }
        .highlight-card .hc-body .hc-meta {
            font-size: 0.8rem;
            color: var(--text-weak);
            margin-bottom: 8px;
        }
        .highlight-card .hc-body .hc-price {
            font-weight: 700;
            color: var(--cta);
            font-size: 1.1rem;
            margin-top: auto;
        }
        .highlight-card .hc-badge {
            display: inline-block;
            background: #e8f4e8;
            color: #2d7a3c;
            padding: 3px 10px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            align-self: flex-start;
            margin-bottom: 8px;
        }

        /* Brand strip */
        .brand-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .brand-chip {
            background: var(--surface);
            border: 1px solid var(--border-light);
            padding: 14px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            cursor: default;
            letter-spacing: 0.5px;
        }
        .brand-chip:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--shadow);
            transform: translateY(-1px);
        }

        /* Guide cards */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }
        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--border);
        }
        .guide-icon {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            border-radius: var(--radius);
            background: rgba(212, 148, 58, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent);
        }
        .guide-content h4 {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .guide-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(10, 31, 53, 0.025);
        }
        .faq-question .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(10, 31, 53, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition);
            font-size: 0.8rem;
            color: var(--text-secondary);
        }
        .faq-item.open .faq-question .faq-arrow {
            transform: rotate(180deg);
            background: var(--accent);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px solid transparent;
        }
        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 16px 24px 20px;
            border-top-color: var(--border-light);
        }

        /* CTA */
        .cta-section {
            background: var(--primary);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.12;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.9;
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.5px;
            transition: all var(--transition);
            box-shadow: 0 6px 20px rgba(212, 148, 58, 0.35);
        }
        .btn-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(212, 148, 58, 0.45);
        }

        /* Footer */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 0 20px;
            margin-top: var(--section-gap);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col p {
            font-size: 0.88rem;
            line-height: 1.75;
            opacity: 0.8;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.82rem;
            opacity: 0.7;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .subcat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .highlight-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner h1 {
                font-size: 2.1rem;
            }
            .section {
                padding: 44px 0;
            }
            :root {
                --section-gap: 44px;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .subcat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .highlight-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .page-banner {
                min-height: 260px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h3 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            :root {
                --section-gap: 36px;
                --header-height: 60px;
            }
            .brand-strip {
                gap: 10px;
            }
            .brand-chip {
                padding: 10px 18px;
                font-size: 0.88rem;
            }
            .subcat-card .card-img-wrap {
                height: 150px;
            }
            .highlight-card .hc-img {
                height: 140px;
            }
        }

        @media (max-width: 520px) {
            .subcat-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .highlight-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .page-banner {
                min-height: 220px;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner .banner-desc {
                font-size: 0.85rem;
            }
            .container {
                padding: 0 14px;
            }
            .header-inner {
                padding: 0 14px;
                gap: 12px;
            }
            .logo-link {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .highlight-card .hc-body h4 {
                font-size: 0.88rem;
            }
            .highlight-card .hc-body .hc-price {
                font-size: 0.95rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 0.85rem;
            }
            .faq-item.open .faq-answer {
                padding: 12px 18px 16px;
            }
            .btn-cta {
                padding: 12px 26px;
                font-size: 0.9rem;
            }
            .brand-chip {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0f2b46;
            --primary-light: #1a3f63;
            --primary-dark: #091c30;
            --accent: #e8943a;
            --accent-hover: #d17e2c;
            --accent-light: #fdf0e3;
            --bg: #ffffff;
            --bg-soft: #f6f7f9;
            --bg-warm: #faf9f6;
            --text: #1a1a1a;
            --text-soft: #5a5f66;
            --text-muted: #8b9199;
            --border: #e2e4e8;
            --border-light: #eef0f3;
            --shadow-sm: 0 1px 3px rgba(15, 43, 70, 0.06);
            --shadow: 0 4px 16px rgba(15, 43, 70, 0.08);
            --shadow-md: 0 8px 28px rgba(15, 43, 70, 0.10);
            --shadow-lg: 0 16px 48px rgba(15, 43, 70, 0.14);
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1240px;
            --header-height: 68px;
        }

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

        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-color: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: opacity var(--transition);
        }

        .logo-link:hover {
            opacity: 0.82;
        }

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

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

        .nav-desktop a {
            display: inline-flex;
            align-items: center;
            padding: 8px 15px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-soft);
            border-radius: 30px;
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-desktop a:hover {
            color: var(--primary);
            background: rgba(15, 43, 70, 0.04);
        }

        .nav-desktop a.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(15, 43, 70, 0.06);
        }

        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
            z-index: 110;
        }

        .mobile-menu-toggle:hover {
            background: rgba(15, 43, 70, 0.05);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 3px;
            transition: all var(--transition);
            transform-origin: center;
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            padding: 70px 0 60px;
            background: linear-gradient(170deg, #0f2b46 0%, #1a3f63 40%, #0d2238 100%);
            overflow: hidden;
            color: #fff;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 35%;
            opacity: 0.22;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
            z-index: 1;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .banner-badge {
            display: inline-block;
            padding: 6px 18px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
            backdrop-filter: blur(4px);
        }

        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            margin-bottom: 14px;
            line-height: 1.25;
        }

        .page-banner .banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.82);
            max-width: 640px;
            margin: 0 auto 8px;
            line-height: 1.65;
        }

        /* Sections */
        .section {
            padding: 64px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 42px;
        }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.02em;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-soft);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* Category Overview */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .overview-text h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .overview-text p {
            color: var(--text-soft);
            line-height: 1.75;
            margin-bottom: 12px;
            font-size: 0.98rem;
        }

        .overview-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .stat-card {
            background: var(--bg-soft);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .stat-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
            border-color: transparent;
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
        }

        .stat-number span {
            color: var(--accent);
            font-size: 1.3rem;
            margin-left: 2px;
        }

        .stat-label {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Subcategory Cards */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .subcat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .subcat-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

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

        .subcat-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .subcat-card-body p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }

        .subcat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent);
            transition: all var(--transition);
        }

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

        .subcat-link::after {
            content: '→';
            transition: transform var(--transition);
        }

        .subcat-link:hover::after {
            transform: translateX(3px);
        }

        /* Review Cards */
        .review-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .review-card {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 22px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            align-items: flex-start;
        }

        .review-card:hover {
            box-shadow: var(--shadow);
            border-color: transparent;
        }

        .review-card-img {
            width: 140px;
            height: 140px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }

        .review-card-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .review-rating {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: #f5a623;
            font-size: 0.85rem;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .review-card-content p {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.6;
            margin-bottom: 8px;
        }

        .review-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--accent-light);
            color: var(--accent);
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }

        /* Brand Section */
        .brand-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .brand-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 18px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .brand-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
            border-color: transparent;
        }

        .brand-card-img {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 14px;
            border: 3px solid var(--border-light);
        }

        .brand-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .brand-card .brand-feature {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Guide Steps */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }

        .step-item {
            position: relative;
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 22px 22px;
            border: 1px solid var(--border-light);
            text-align: center;
            transition: all var(--transition);
            counter-increment: step-counter;
        }

        .step-item:hover {
            box-shadow: var(--shadow);
            border-color: transparent;
        }

        .step-item::before {
            content: counter(step-counter);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: 50%;
            margin: 0 auto 14px;
        }

        .step-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 0.88rem;
            color: var(--text-soft);
            line-height: 1.6;
        }

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

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

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

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            transition: background var(--transition);
            background: transparent;
        }

        .faq-question:hover {
            background: rgba(15, 43, 70, 0.02);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--text-soft);
            transition: all var(--transition);
            font-weight: 700;
            line-height: 1;
        }

        .faq-item.open .faq-icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 22px;
            font-size: 0.92rem;
            color: var(--text-soft);
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* CTA */
        .cta-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .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;
            mix-blend-mode: overlay;
        }

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

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1rem;
            max-width: 500px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 30px;
            transition: all var(--transition);
            letter-spacing: 0.03em;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(232, 148, 58, 0.35);
        }

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

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

        /* Footer */
        .site-footer {
            background: #0d1f33;
            color: rgba(255, 255, 255, 0.78);
            padding: 50px 0 24px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .footer-col p {
            font-size: 0.85rem;
            line-height: 1.7;
            margin: 0;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            padding: 5px 0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .overview-stats {
                grid-template-columns: repeat(4, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-toggle {
                display: flex;
            }
            .nav-desktop {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 12px 20px 20px;
                gap: 2px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 99;
            }
            .nav-desktop.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-desktop a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-xs);
                font-size: 0.95rem;
                justify-content: flex-start;
            }
            .nav-desktop a.active::after {
                display: none;
            }
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .review-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .review-card {
                flex-direction: column;
            }
            .review-card-img {
                width: 100%;
                height: 180px;
            }
            .brand-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .steps-list {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .overview-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .page-banner {
                padding: 50px 0 44px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
            .section {
                padding: 44px 0;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .container {
                padding: 0 18px;
            }
            .header-inner {
                padding: 0 18px;
            }
        }

        @media (max-width: 520px) {
            .brand-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .steps-list {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .overview-stats {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-number {
                font-size: 1.7rem;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .subcat-card-img {
                height: 160px;
            }
            .review-card-img {
                height: 150px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.88rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1a2a4a;
            --primary-light: #2c3e6b;
            --accent: #c9974c;
            --accent-light: #e0b977;
            --accent-dark: #a37830;
            --bg-white: #ffffff;
            --bg-light: #f7f8fa;
            --bg-cream: #faf8f5;
            --bg-dark: #111827;
            --text-primary: #1a1a1a;
            --text-secondary: #4b5563;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --text-on-dark: #e5e7eb;
            --border-light: #e5e7eb;
            --border-medium: #d1d5db;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.11);
            --shadow-xl: 0 12px 36px rgba(0, 0, 0, 0.13);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1240px;
            --header-height: 70px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--bg-white);
            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);
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .logo-link:hover {
            opacity: 0.82;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-md);
            font-size: 1.2rem;
            font-weight: 800;
            flex-shrink: 0;
        }

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

        .nav-desktop a {
            display: inline-flex;
            align-items: center;
            padding: 8px 15px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 20px;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-desktop a:hover {
            color: var(--primary);
            background: rgba(26, 42, 74, 0.05);
        }

        .nav-desktop a.active {
            color: var(--accent-dark);
            font-weight: 600;
            background: rgba(201, 151, 76, 0.1);
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2.2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
            z-index: 999;
        }

        .mobile-nav.active {
            display: flex;
        }

        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .mobile-nav a:hover,
        .mobile-nav a.active {
            background: rgba(26, 42, 74, 0.06);
            color: var(--accent-dark);
            font-weight: 600;
        }

        /* Page Banner */
        .page-banner {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 60%, #1e3a5f 100%);
            padding: 60px 0 56px;
            position: relative;
            overflow: hidden;
            color: #fff;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(201, 151, 76, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .banner-content {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .banner-content .badge-row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .badge-row .badge {
            display: inline-block;
            padding: 5px 14px;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            backdrop-filter: blur(4px);
        }

        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.8px;
            line-height: 1.25;
            margin: 0;
        }

        .page-banner .subtitle {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Main */
        .page-main {
            flex: 1;
            padding: 0 0 60px;
        }

        .section {
            padding: 56px 0;
        }

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

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.4px;
            margin-bottom: 8px;
        }

        .section-header .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 580px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
            margin: 12px auto 0;
        }

        /* Brand filter bar */
        .brand-filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 36px;
        }

        .filter-chip {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            border: 1.5px solid var(--border-medium);
            background: #fff;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .filter-chip:hover {
            border-color: var(--accent);
            color: var(--accent-dark);
            background: rgba(201, 151, 76, 0.04);
        }

        .filter-chip.active {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            font-weight: 600;
        }

        /* Brand cards grid */
        .brand-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 28px;
        }

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

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

        .brand-card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .brand-card-img .brand-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.5) 0%, transparent 60%);
            display: flex;
            align-items: flex-end;
            padding: 20px;
        }

        .brand-card-img .brand-name-tag {
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            letter-spacing: -0.2px;
            text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
        }

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

        .brand-card-body .brand-title-row {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .brand-card-body .brand-title-row h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
        }

        .brand-card-body .rating-stars {
            color: var(--accent);
            font-size: 0.9rem;
            letter-spacing: 1px;
        }

        .brand-card-body .brand-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.65;
            flex: 1;
        }

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

        .brand-card-body .brand-tags span {
            font-size: 0.78rem;
            padding: 3px 10px;
            background: var(--bg-light);
            color: var(--text-secondary);
            border-radius: 14px;
            font-weight: 500;
        }

        .brand-card-body .brand-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding-top: 6px;
            border-top: 1px solid var(--border-light);
        }

        .btn-outline-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border: 1.5px solid var(--accent);
            color: var(--accent-dark);
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }

        .btn-outline-sm:hover {
            background: var(--accent);
            color: #fff;
        }

        /* Comparison Table */
        .comparison-section {
            background: var(--bg-light);
            border-radius: var(--radius-xl);
            padding: 40px 28px;
            margin-top: 24px;
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            min-width: 700px;
            border-collapse: collapse;
            font-size: 0.92rem;
        }

        .comparison-table th {
            text-align: left;
            padding: 12px 16px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.85rem;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .comparison-table th:first-child {
            border-radius: var(--radius-sm) 0 0 0;
        }

        .comparison-table th:last-child {
            border-radius: 0 var(--radius-sm) 0 0;
        }

        .comparison-table td {
            padding: 14px 16px;
            border-bottom: 1px solid var(--border-light);
            vertical-align: middle;
        }

        .comparison-table tr:hover td {
            background: rgba(255, 255, 255, 0.6);
        }

        .comparison-table .brand-cell {
            font-weight: 700;
            color: var(--primary);
        }

        /* Tips cards */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .tip-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            text-align: center;
        }

        .tip-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .tip-card .tip-icon {
            font-size: 2.8rem;
            margin-bottom: 14px;
        }

        .tip-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .tip-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #fff;
            transition: box-shadow var(--transition-base);
        }

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

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: #fff;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: background var(--transition-fast);
        }

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

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 22px 18px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #1e3b5c 100%);
            border-radius: var(--radius-xl);
            padding: 50px 36px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            left: -15%;
            width: 450px;
            height: 450px;
            background: radial-gradient(circle, rgba(201, 151, 76, 0.16) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-section>* {
            position: relative;
            z-index: 1;
        }

        .cta-section h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 500px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 32px;
            background: var(--accent);
            color: #fff;
            border-radius: 28px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-base);
            letter-spacing: 0.2px;
            box-shadow: 0 4px 14px rgba(201, 151, 76, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            box-shadow: 0 6px 20px rgba(201, 151, 76, 0.5);
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            padding: 48px 0 24px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 36px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: #fff;
            letter-spacing: -0.1px;
        }

        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: var(--text-light);
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 0.82rem;
            color: var(--text-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .brand-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
            .page-banner h1 {
                font-size: 2.1rem;
            }
            .tips-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .brand-grid {
                grid-template-columns: 1fr;
            }
            .page-banner {
                padding: 44px 0 40px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner .subtitle {
                font-size: 0.95rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .cta-section {
                padding: 36px 22px;
            }
            .cta-section h3 {
                font-size: 1.4rem;
            }
            .comparison-section {
                padding: 24px 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 14px;
            }
            .container {
                padding: 0 14px;
            }
            .brand-filter-bar {
                gap: 6px;
            }
            .filter-chip {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .brand-card-body {
                padding: 16px 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #1e3a5f;
            --color-primary-light: #2a4f7f;
            --color-primary-dark: #152940;
            --color-accent: #b8860b;
            --color-accent-light: #d4a53c;
            --color-accent-pale: #fef9f0;
            --color-bg: #f7f8fa;
            --color-white: #ffffff;
            --color-text: #1a202c;
            --color-text-secondary: #4a5568;
            --color-text-muted: #718096;
            --color-border: #e2e8f0;
            --color-border-light: #edf2f7;
            --color-success: #38a169;
            --color-star: #e6a817;
            --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 12px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.09), 0 4px 8px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.11), 0 8px 16px rgba(0, 0, 0, 0.05);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
        }

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

        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(--color-text);
            background-color: var(--color-bg);
            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);
        }

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

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

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-padding {
            padding: 72px 0;
        }

        .section-padding-sm {
            padding: 48px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            background: var(--color-accent-pale);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            margin-bottom: 36px;
            max-width: 600px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-smooth);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 9px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--color-primary-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--color-accent);
        }

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

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

        .nav-desktop a {
            display: inline-block;
            padding: 8px 15px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: 6px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-desktop a:hover {
            color: var(--color-primary);
            background: rgba(30, 58, 95, 0.04);
        }

        .nav-desktop a.active {
            color: var(--color-primary);
            font-weight: 600;
            background: rgba(30, 58, 95, 0.06);
        }

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

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 110;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .mobile-menu-toggle:hover {
            background: rgba(30, 58, 95, 0.05);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--color-primary-dark);
            border-radius: 2px;
            transition: all var(--transition-smooth);
            transform-origin: center;
        }

        .mobile-menu-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .mobile-menu-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .mobile-menu-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            z-index: 99;
            flex-direction: column;
            padding: 20px 24px 40px;
            overflow-y: auto;
            gap: 4px;
            border-top: 1px solid var(--color-border-light);
        }

        .mobile-nav-panel.active {
            display: flex;
        }

        .mobile-nav-panel a {
            display: block;
            padding: 14px 18px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .mobile-nav-panel a:hover {
            background: rgba(30, 58, 95, 0.04);
            color: var(--color-primary);
        }

        .mobile-nav-panel a.active {
            background: rgba(30, 58, 95, 0.06);
            color: var(--color-primary);
            font-weight: 600;
            border-color: var(--color-border);
        }

        /* Hero */
        .hero-banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #1a3550 0%, #1e3a5f 30%, #152940 100%);
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(21, 41, 64, 0.82) 0%, rgba(21, 41, 64, 0.7) 100%);
            z-index: 1;
        }

        .hero-banner .hero-content {
            position: relative;
            z-index: 2;
            padding: 60px 0;
            max-width: 700px;
        }

        .hero-banner .hero-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.07em;
            color: #f0d78c;
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
            border: 1px solid rgba(255, 255, 255, 0.18);
        }

        .hero-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }

        .hero-banner .hero-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 560px;
        }

        .hero-banner .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 12px 26px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 28px;
            transition: all var(--transition-smooth);
            letter-spacing: 0.01em;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(184, 134, 11, 0.3);
        }

        .btn-primary:hover {
            background: var(--color-accent-light);
            box-shadow: 0 6px 20px rgba(184, 134, 11, 0.4);
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.8);
            transform: translateY(-1px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 22px;
        }

        .btn-ghost {
            background: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-border);
            padding: 10px 22px;
        }
        .btn-ghost:hover {
            background: rgba(30, 58, 95, 0.04);
            border-color: var(--color-primary);
            transform: translateY(-1px);
        }

        /* Stats Row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -40px;
            position: relative;
            z-index: 5;
        }

        .stat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            transition: all var(--transition-smooth);
            border: 1px solid var(--color-border-light);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.1;
            margin-bottom: 4px;
        }

        .stat-number .stat-unit {
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-accent);
        }

        .stat-label {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            font-weight: 500;
        }

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

        .brand-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-smooth);
            display: flex;
            flex-direction: column;
        }

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

        .brand-card .card-img-wrap {
            position: relative;
            height: 200px;
            overflow: hidden;
            background: #f0f2f5;
        }

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

        .brand-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }

        .brand-card .card-badge {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--color-accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 14px;
            z-index: 2;
            letter-spacing: 0.02em;
        }

        .brand-card .card-body {
            padding: 20px 18px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .brand-card .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 6px;
        }

        .brand-card .card-stars {
            display: flex;
            gap: 2px;
            margin-bottom: 8px;
            color: var(--color-star);
            font-size: 0.9rem;
        }

        .brand-card .card-desc {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }

        .brand-card .card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }

        .brand-card .card-tag {
            font-size: 0.75rem;
            padding: 4px 10px;
            background: #f1f5f9;
            color: var(--color-text-secondary);
            border-radius: 12px;
            font-weight: 500;
        }

        .brand-card .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }

        .brand-card .card-link:hover {
            gap: 8px;
            color: var(--color-accent);
        }

        .card-link-arrow {
            display: inline-block;
            transition: transform var(--transition-fast);
        }

        .brand-card .card-link:hover .card-link-arrow {
            transform: translateX(3px);
        }

        /* Rank List */
        .rank-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 16px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
        }

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

        .rank-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
            color: #fff;
        }

        .rank-num.top1 {
            background: linear-gradient(135deg, #f6c343, #e6a817);
        }
        .rank-num.top2 {
            background: linear-gradient(135deg, #b0b8c1, #8895a0);
        }
        .rank-num.top3 {
            background: linear-gradient(135deg, #c4956a, #a8764d);
        }
        .rank-num.normal {
            background: #e2e8f0;
            color: var(--color-text-secondary);
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-name {
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-primary-dark);
            margin-bottom: 2px;
        }

        .rank-meta {
            font-size: 0.82rem;
            color: var(--color-text-muted);
        }

        .rank-score {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        /* Feature Block */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .feature-block .feature-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .feature-block .feature-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .feature-block .feature-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 12px;
        }

        .feature-block .feature-text p {
            color: var(--color-text-secondary);
            line-height: 1.8;
            margin-bottom: 10px;
        }

        .feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 16px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.93rem;
            color: var(--color-text);
        }

        .feature-list .check-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: #e8f5e9;
            color: var(--color-success);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            margin-top: 2px;
        }

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

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

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

        .faq-q {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-primary-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
            transition: background var(--transition-fast);
        }

        .faq-q:hover {
            background: rgba(30, 58, 95, 0.02);
        }

        .faq-q .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--color-border-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-smooth);
            color: var(--color-text-muted);
        }

        .faq-item.open .faq-icon {
            background: var(--color-accent-pale);
            color: var(--color-accent);
            transform: rotate(45deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
            font-size: 0.93rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            border-top: 0px solid transparent;
            transition: all 0.4s ease;
        }

        .faq-item.open .faq-a {
            max-height: 400px;
            padding: 14px 22px 20px;
            border-top: 1px solid var(--color-border-light);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(160deg, #1e3a5f 0%, #152940 100%);
            border-radius: var(--radius-xl);
            padding: 52px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 50%;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 160px;
            height: 160px;
            background: rgba(255, 255, 255, 0.025);
            border-radius: 50%;
        }

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

        .cta-section h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
            font-size: 1rem;
        }

        .cta-section .btn-primary {
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 30px;
        }

        /* Footer */
        .site-footer {
            background: #1a2634;
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 20px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            padding: 4px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: #f0d78c;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
                margin-top: -30px;
            }
            .feature-block {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .hero-banner h1 {
                font-size: 2.1rem;
            }
            .hero-banner {
                min-height: 350px;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
                margin-top: -24px;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .section-padding {
                padding: 44px 0;
            }
            .section-title {
                font-size: 1.45rem;
            }
            .hero-banner {
                min-height: 300px;
            }
            .hero-banner h1 {
                font-size: 1.7rem;
            }
            .hero-banner .hero-desc {
                font-size: 0.95rem;
            }
            .feature-block .feature-text h3 {
                font-size: 1.3rem;
            }
            .rank-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 14px 15px;
            }
            .rank-score {
                font-size: 1.1rem;
            }
            .cta-section {
                padding: 36px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h3 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .container {
                padding: 0 16px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 520px) {
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
                margin-top: -18px;
            }
            .stat-card {
                padding: 14px 10px;
            }
            .stat-number {
                font-size: 1.35rem;
            }
            .stat-label {
                font-size: 0.78rem;
            }
            .hero-banner {
                min-height: 260px;
            }
            .hero-banner h1 {
                font-size: 1.45rem;
            }
            .hero-banner .hero-desc {
                font-size: 0.85rem;
            }
            .hero-banner .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-banner .btn {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .brand-card .card-img-wrap {
                height: 180px;
            }
            .rank-num {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
            .faq-q {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-a {
                padding: 10px 16px 16px;
            }
            .header-inner {
                padding: 0 12px;
            }
            .logo-link {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.95rem;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #1b3a5c;
            --color-primary-light: #264f7a;
            --color-primary-dark: #122840;
            --color-accent: #c8963e;
            --color-accent-light: #d9a852;
            --color-accent-dark: #a67a2e;
            --color-bg: #ffffff;
            --color-bg-alt: #f6f7fa;
            --color-bg-dark: #1a1f2e;
            --color-text: #1a1a2e;
            --color-text-secondary: #5a6072;
            --color-text-muted: #8b8fa3;
            --color-border: #e2e5ec;
            --color-border-light: #eef0f5;
            --color-success: #2d8a56;
            --color-white: #ffffff;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 2px 8px 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 12px 40px rgba(0, 0, 0, 0.13);
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Helvetica Neue', 'Segoe UI', system-ui, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1240px;
            --header-height: 68px;
        }

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

        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(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            transition: box-shadow var(--transition-normal);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.01em;
            transition: opacity var(--transition-fast);
            flex-shrink: 0;
        }

        .logo-link:hover {
            opacity: 0.82;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-size: 1.15rem;
            font-weight: 800;
            letter-spacing: 0;
            flex-shrink: 0;
        }

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

        .nav-desktop a {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-desktop a:hover {
            color: var(--color-primary);
            background: rgba(27, 58, 92, 0.04);
        }

        .nav-desktop a.active {
            color: var(--color-accent);
            font-weight: 600;
        }

        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 22px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
        }

        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-menu-toggle:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        .mobile-menu-toggle span {
            display: block;
            width: 22px;
            height: 2.2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: all var(--transition-normal);
            transform-origin: center;
        }

        .mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7.2px) rotate(45deg);
        }

        .mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7.2px) rotate(-45deg);
        }

        @media (max-width: 920px) {
            .nav-desktop {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                gap: 2px;
                border-bottom: 1px 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;
            }

            .nav-desktop.mobile-open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-desktop a {
                padding: 14px 16px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }

            .nav-desktop a.active::after {
                display: none;
            }

            .nav-desktop a.active {
                background: rgba(200, 150, 62, 0.08);
                color: var(--color-accent);
            }

            .mobile-menu-toggle {
                display: flex;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 14px;
            }

            .logo-link {
                font-size: 1.2rem;
                gap: 6px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            background: linear-gradient(160deg, #1b3a5c 0%, #1a2f48 35%, #1f3d5c 65%, #16293d 100%);
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 35%;
            background-blend-mode: overlay;
            min-height: 360px;
            display: flex;
            align-items: center;
            padding: 60px 0;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(27, 58, 92, 0.55) 0%, rgba(18, 40, 64, 0.72) 100%);
            z-index: 1;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.75);
            flex-wrap: wrap;
        }

        .breadcrumb-row a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition-fast);
        }

        .breadcrumb-row a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb-sep {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.75rem;
        }

        .page-banner h1 {
            font-size: 2.7rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1.25;
            max-width: 700px;
        }

        .page-banner .banner-desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .page-banner {
                min-height: 280px;
                padding: 40px 0;
            }

            .page-banner h1 {
                font-size: 1.9rem;
            }

            .page-banner .banner-desc {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .page-banner {
                min-height: 240px;
                padding: 30px 0;
            }

            .page-banner h1 {
                font-size: 1.55rem;
            }

            .page-banner .banner-desc {
                font-size: 0.88rem;
            }
        }

        /* Section */
        .section {
            padding: 70px 0;
        }

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

        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
            margin-bottom: 10px;
        }

        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--color-text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.6;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

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

            .section-header h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 36px 0;
            }

            .section-header h2 {
                font-size: 1.35rem;
            }
        }

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

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

        .cards-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        @media (max-width: 1024px) {
            .cards-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .cards-grid.cols-2 {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* Card */
        .card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
        }

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

        .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #f0f2f5;
        }

        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

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

        .card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(200, 150, 62, 0.1);
            padding: 4px 10px;
            border-radius: 20px;
            align-self: flex-start;
            letter-spacing: 0.02em;
        }

        .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            letter-spacing: -0.01em;
        }

        .card-desc {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            flex: 1;
        }

        .card-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-primary);
            transition: color var(--transition-fast);
            align-self: flex-start;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

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

        .card-link::after {
            content: '→';
            transition: transform var(--transition-fast);
            font-size: 0.85rem;
        }

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

        /* Icon Card */
        .icon-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }

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

        .icon-card .icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            flex-shrink: 0;
        }

        .icon-circle.blue {
            background: rgba(27, 58, 92, 0.1);
            color: var(--color-primary);
        }

        .icon-circle.gold {
            background: rgba(200, 150, 62, 0.12);
            color: var(--color-accent);
        }

        .icon-circle.green {
            background: rgba(45, 138, 86, 0.1);
            color: var(--color-success);
        }

        .icon-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .icon-card p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        /* Compare Table Style Cards */
        .compare-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .compare-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            padding: 26px 20px;
            text-align: center;
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

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

        .compare-card.featured {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-sm);
        }

        .compare-card.featured::before {
            content: '推荐';
            position: absolute;
            top: 14px;
            right: -28px;
            background: var(--color-accent);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 3px 32px;
            transform: rotate(45deg);
            letter-spacing: 0.04em;
        }

        .compare-card .mat-icon {
            font-size: 2.4rem;
            margin-bottom: 10px;
        }

        .compare-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .compare-card ul {
            text-align: left;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            padding-left: 4px;
        }

        .compare-card ul li::before {
            content: '•';
            color: var(--color-accent);
            margin-right: 6px;
            font-weight: 700;
        }

        @media (max-width: 1024px) {
            .compare-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .compare-row {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* Steps */
        .steps-list {
            display: flex;
            flex-direction: column;
            gap: 22px;
            max-width: 780px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
        }

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

        .step-num {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.05rem;
        }

        .step-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .step-content p {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 520px) {
            .step-item {
                flex-direction: column;
                gap: 10px;
                padding: 18px 16px;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

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

        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            gap: 12px;
            transition: background var(--transition-fast);
            user-select: none;
        }

        .faq-q:hover {
            background: rgba(0, 0, 0, 0.02);
        }

        .faq-q .faq-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--color-bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-normal);
            color: var(--color-text-secondary);
            font-weight: 700;
        }

        .faq-item.open .faq-q .faq-icon {
            background: var(--color-accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-normal), padding var(--transition-normal);
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            padding: 0 22px;
        }

        .faq-item.open .faq-a {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        /* CTA */
        .cta-block {
            text-align: center;
            padding: 50px 0;
        }

        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-block p {
            font-size: 1rem;
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }

        .section-dark .cta-block p {
            color: rgba(255, 255, 255, 0.7);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
            cursor: pointer;
            text-decoration: none;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
            border: 2px solid var(--color-accent);
        }

        .btn-primary:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .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-md);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.55);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        @media (max-width: 520px) {
            .btn {
                padding: 11px 22px;
                font-size: 0.88rem;
            }
        }

        /* Footer */
        .site-footer {
            background: #141a25;
            color: rgba(255, 255, 255, 0.78);
            padding: 56px 0 24px;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            padding: 4px 0;
            transition: color var(--transition-fast);
            font-size: 0.88rem;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }

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

            .site-footer {
                padding: 36px 0 20px;
            }
        }

        /* Utility */
        .text-center {
            text-align: center;
        }

        .mt-sm {
            margin-top: 14px;
        }

        .mt-md {
            margin-top: 24px;
        }

        .mt-lg {
            margin-top: 36px;
        }

        .highlight {
            color: var(--color-accent);
            font-weight: 600;
        }

        @media (max-width: 520px) {
            .hide-mobile {
                display: none;
            }
        }