/* roulang page: index */
:root {
            --color-primary: #2C3E6B;
            --color-primary-dark: #1E2D52;
            --color-primary-light: #3D5290;
            --color-accent: #C8945A;
            --color-accent-light: #D9AD78;
            --color-accent-dark: #A8773E;
            --color-bg: #FAF9F7;
            --color-surface: #FFFFFF;
            --color-surface-alt: #F4F2EE;
            --color-text: #1E1E24;
            --color-text-secondary: #4A4A55;
            --color-muted: #787880;
            --color-border: #E5E3DD;
            --color-border-light: #F0EDE8;
            --color-success: #3D8B6E;
            --color-warning: #E8A858;
            --color-danger: #C85555;
            --color-star: #E2A83E;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --font-display: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --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 16px rgba(0,0,0,0.08);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.14);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --container-max: 1200px;
            --container-narrow: 900px;
            --header-height: 68px;
            --header-height-mobile: 60px;
        }

        *,
        *::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: 1.65;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        .container-narrow {
            max-width: var(--container-narrow);
        }

        .section {
            padding: 72px 0;
        }

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

        .section-lg {
            padding: 96px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            display: inline-block;
            width: 20px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 620px;
            line-height: 1.7;
        }

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

        .section-header .section-subtitle {
            margin: 0 auto;
        }

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

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border-light);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }

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

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .header-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            letter-spacing: 0;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--color-surface-alt);
            border-radius: var(--radius-full);
            padding: 5px;
            flex-shrink: 0;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .header-nav a:hover {
            color: var(--color-primary);
            background: rgba(44, 62, 107, 0.05);
        }

        .header-nav a.active {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
            font-weight: 600;
        }

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

        .header-cta {
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: -0.01em;
            transition: all var(--transition);
            white-space: nowrap;
            cursor: pointer;
            border: 2px solid transparent;
            text-align: center;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(44, 62, 107, 0.35);
            outline-offset: 3px;
        }

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

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

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

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

        .btn-accent: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-color: var(--color-primary);
        }

        .btn-outline:hover {
            background: var(--color-primary);
            color: #fff;
            box-shadow: var(--shadow);
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 1.05rem;
            border-radius: var(--radius-full);
        }

        .btn-sm {
            padding: 7px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-full);
        }

        .mobile-menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--color-text);
            font-size: 1.4rem;
            flex-shrink: 0;
        }

        /* ============ HERO ============ */
        .hero {
            position: relative;
            padding: 80px 0 90px;
            background: linear-gradient(160deg, #1E2D52 0%, #2C3E6B 30%, #1a2847 100%);
            color: #fff;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }

        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.35;
            filter: brightness(0.7) saturate(0.6);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: radial-gradient(ellipse at 30% 50%, rgba(200, 148, 90, 0.12) 0%, transparent 60%),
                        linear-gradient(180deg, rgba(30, 45, 82, 0.55) 0%, rgba(30, 45, 82, 0.75) 100%);
        }

        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content {
            max-width: 560px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
            color: #fff;
        }

        .hero-badge .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #4ADE80;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5); }
            50% { box-shadow: 0 0 0 10px rgba(74, 222, 128, 0); }
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 18px;
            color: #fff;
        }

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

        .hero p {
            font-size: 1.1rem;
            line-height: 1.7;
            opacity: 0.9;
            margin-bottom: 32px;
            color: rgba(255, 255, 255, 0.85);
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }

        .hero-stats {
            display: flex;
            gap: 28px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-value {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .hero-stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 2px;
        }

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

        .hero-visual-card {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 28px;
            max-width: 380px;
            width: 100%;
        }

        .hero-visual-card .rating-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .hero-visual-card .stars {
            color: var(--color-star);
            font-size: 1.1rem;
            letter-spacing: 2px;
        }

        .hero-visual-card .rating-text {
            font-weight: 600;
            font-size: 1rem;
            color: #fff;
        }

        .hero-visual-card .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .hero-visual-card .feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.85);
        }

        .hero-visual-card .check-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(74, 222, 128, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            color: #4ADE80;
            flex-shrink: 0;
        }

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

        .feature-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-accent) 100%);
            opacity: 0;
            transition: opacity var(--transition);
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
        }

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

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 18px;
            background: var(--color-surface-alt);
            color: var(--color-primary);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

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

        /* ============ CATEGORY ENTRY ============ */
        .category-entry-section {
            background: var(--color-surface);
            border-top: 1px solid var(--color-border-light);
            border-bottom: 1px solid var(--color-border-light);
        }

        .category-chips {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .category-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 24px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            background: var(--color-surface-alt);
            color: var(--color-text-secondary);
            transition: all var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
        }

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

        .category-chip .chip-icon {
            font-size: 1.2rem;
        }

        /* ============ CMS LIST SECTION ============ */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

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

        .post-card-image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-surface-alt);
        }

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

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

        .post-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(44, 62, 107, 0.9);
            color: #fff;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 600;
            z-index: 1;
            backdrop-filter: blur(4px);
        }

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

        .post-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .post-card-body h3 a {
            color: var(--color-text);
            transition: color var(--transition-fast);
        }

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

        .post-card-excerpt {
            font-size: 0.85rem;
            color: var(--color-muted);
            line-height: 1.55;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .post-card-meta {
            font-size: 0.78rem;
            color: var(--color-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .posts-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--color-muted);
            font-size: 1rem;
        }

        /* ============ COMPARE SECTION ============ */
        .compare-wrapper {
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
        }

        .compare-table th,
        .compare-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--color-border-light);
        }

        .compare-table th {
            background: var(--color-surface-alt);
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }

        .compare-table td {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
        }

        .compare-table .highlight-col {
            background: rgba(44, 62, 107, 0.03);
        }

        .compare-table .check-mark {
            color: var(--color-success);
            font-weight: 700;
        }

        .compare-table .cross-mark {
            color: var(--color-muted);
        }

        /* ============ STATS SECTION ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            text-align: center;
            padding: 28px 16px;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }

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

        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: var(--color-primary);
            line-height: 1;
            margin-bottom: 8px;
        }

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

        /* ============ TESTIMONIALS ============ */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .testimonial-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow);
        }

        .testimonial-stars {
            color: var(--color-star);
            font-size: 0.95rem;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .testimonial-text {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
            font-style: italic;
        }

        .testimonial-author {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--color-text);
        }

        .testimonial-role {
            font-size: 0.75rem;
            color: var(--color-muted);
        }

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

        .faq-item {
            background: var(--color-surface);
            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: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            background: none;
            border: none;
            font-family: var(--font-sans);
            line-height: 1.5;
            transition: color var(--transition-fast);
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--color-surface-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition);
            color: var(--color-text-secondary);
        }

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: none;
        }

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

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

        /* ============ CTA SECTION ============ */
        .cta-section {
            background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #fff;
            text-align: center;
            border-radius: var(--radius-xl);
            margin: 0 24px;
            padding: 64px 32px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(200, 148, 90, 0.1);
            top: -80px;
            right: -60px;
            z-index: 0;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            bottom: -40px;
            left: -40px;
            z-index: 0;
        }

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

        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.85;
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .btn {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
            font-size: 1.05rem;
            padding: 14px 36px;
        }

        .cta-section .btn:hover {
            background: #fff;
            color: var(--color-primary);
            border-color: #fff;
            box-shadow: var(--shadow-lg);
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 28px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.02em;
        }

        .footer-brand p {
            font-size: 0.85rem;
            opacity: 0.7;
            line-height: 1.6;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            font-size: 0.85rem;
            opacity: 0.7;
            transition: all var(--transition-fast);
        }

        .footer-links a:hover {
            opacity: 1;
            color: var(--color-accent-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            opacity: 0.6;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.8);
        }

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

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 36px;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
                margin: 0 auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .hero-visual-card {
                max-width: 100%;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .posts-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 16px;
                right: 16px;
                background: var(--color-surface);
                border-radius: var(--radius-lg);
                box-shadow: var(--shadow-lg);
                flex-direction: column;
                padding: 12px;
                gap: 4px;
                z-index: 999;
                border: 1px solid var(--color-border-light);
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                border-radius: var(--radius);
                padding: 10px 16px;
                width: 100%;
                text-align: center;
                font-size: 0.95rem;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .site-header {
                height: var(--header-height-mobile);
            }
            .header-logo {
                font-size: 1.15rem;
            }
            .header-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .header-cta .btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .hero {
                padding: 56px 0 60px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-section {
                margin: 0 12px;
                padding: 44px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-lg {
                padding: 64px 0;
            }
            .section-title {
                font-size: 1.55rem;
            }
            .compare-table th,
            .compare-table td {
                padding: 10px 12px;
                font-size: 0.78rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero p {
                font-size: 0.9rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat-value {
                font-size: 1.3rem;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .stat-card {
                padding: 18px 10px;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .category-chips {
                flex-direction: column;
                align-items: stretch;
            }
            .category-chip {
                justify-content: center;
                text-align: center;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .hero-visual-card {
                padding: 18px;
            }
            .compare-table {
                font-size: 0.7rem;
            }
            .compare-table th,
            .compare-table td {
                padding: 8px 6px;
                font-size: 0.7rem;
            }
        }

        @media (min-width: 769px) {
            .header-nav {
                display: flex !important;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1a7a5a;
            --primary-hover: #145f46;
            --primary-light: #e8f5f0;
            --primary-soft: #f2faf7;
            --accent: #e8873a;
            --accent-hover: #d0742e;
            --bg: #fafbfc;
            --surface: #ffffff;
            --surface-alt: #f5f7f9;
            --text: #1c1e21;
            --text-secondary: #5a6072;
            --text-muted: #8b919e;
            --border: #e2e6ed;
            --border-light: #eef1f5;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 14px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-xl: 0 14px 48px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --radius-full: 50%;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Menlo', monospace;
            --max-width: 1200px;
            --header-height: 68px;
            --spacing-xs: 8px;
            --spacing-sm: 14px;
            --spacing-md: 22px;
            --spacing-lg: 36px;
            --spacing-xl: 52px;
            --spacing-2xl: 72px;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s ease;
        }

        *, *::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: 1.65;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button, 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 24px;
        }

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

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

        .header-logo {
            font-size: 1.24rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .header-logo .logo-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: var(--radius-full);
            background: var(--accent);
            flex-shrink: 0;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--surface-alt);
            border-radius: var(--radius-full);
            padding: 5px;
        }

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 9px 20px;
            border-radius: var(--radius-full);
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .header-nav a:hover {
            color: var(--text);
            background: rgba(26,122,90,0.06);
        }

        .header-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(26,122,90,0.3);
            font-weight: 600;
        }

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

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            font-size: 0.93rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 2px 10px rgba(232,135,58,0.28);
        }

        .header-cta:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(232,135,58,0.38);
            transform: translateY(-1px);
        }

        .header-cta:active {
            transform: translateY(0);
            box-shadow: 0 1px 6px rgba(232,135,58,0.25);
        }

        .mobile-menu-trigger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            color: var(--text);
            font-size: 1.5rem;
            line-height: 1;
        }

        /* ===== Category Hero ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(170deg, #1a3c2e 0%, #1a5a42 30%, #1a7a5a 60%, #0f4d38 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 35%;
            background-blend-mode: overlay;
            padding: var(--spacing-2xl) 0;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(232,135,58,0.25) 0%, transparent 60%),
                        radial-gradient(ellipse at 30% 70%, rgba(26,122,90,0.4) 0%, transparent 55%);
            pointer-events: none;
        }

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

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: rgba(255,255,255,0.18);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.25);
            padding: 7px 18px;
            border-radius: var(--radius-full);
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: var(--spacing-md);
            color: #fff;
        }

        .category-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.22;
            margin-bottom: var(--spacing-sm);
            max-width: 720px;
            margin-left: auto;
            margin-right: auto;
        }

        .category-hero .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.85);
            max-width: 580px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.6;
        }

        .hero-stats-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
        }

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

        .hero-stat .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.01em;
        }

        .hero-stat .stat-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-top: 2px;
        }

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

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

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

        .section-header .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
            margin-bottom: var(--spacing-xs);
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 750;
            color: var(--text);
            letter-spacing: -0.015em;
            margin-bottom: var(--spacing-xs);
        }

        .section-header .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.55;
        }

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

        .platform-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 32px 26px 26px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            position: relative;
        }

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

        .platform-card.featured {
            border: 2px solid var(--primary);
            box-shadow: var(--shadow-md);
            background: var(--primary-soft);
        }

        .platform-card .card-icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: var(--spacing-md);
            font-size: 1.8rem;
            flex-shrink: 0;
        }

        .platform-card .card-icon-android {
            background: #e8f8ef;
            color: #1a7a5a;
        }
        .platform-card .card-icon-ios {
            background: #eef3fb;
            color: #3b6ec4;
        }
        .platform-card .card-icon-pc {
            background: #fef5ec;
            color: #e8873a;
        }

        .platform-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .platform-card .card-badge {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background: var(--primary-light);
            color: var(--primary);
            margin-bottom: var(--spacing-sm);
        }

        .platform-card.featured .card-badge {
            background: var(--primary);
            color: #fff;
        }

        .platform-card .card-desc {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: var(--spacing-md);
            flex-grow: 1;
        }

        .platform-card .card-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
            margin-bottom: var(--spacing-md);
        }

        .platform-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .btn-card {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 11px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.93rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            border: none;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(26,122,90,0.25);
            text-decoration: none;
        }

        .btn-card:hover {
            background: var(--primary-hover);
            box-shadow: 0 4px 16px rgba(26,122,90,0.35);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-card:active {
            transform: translateY(0);
        }

        .btn-card-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: none;
        }

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

        /* ===== Steps Timeline ===== */
        .steps-timeline {
            max-width: 760px;
            margin: 0 auto;
            position: relative;
        }

        .steps-timeline::before {
            content: '';
            position: absolute;
            left: 28px;
            top: 10px;
            bottom: 10px;
            width: 3px;
            background: var(--border);
            border-radius: 99px;
        }

        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            margin-bottom: 28px;
            position: relative;
        }

        .step-item:last-child {
            margin-bottom: 0;
        }

        .step-number {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            border-radius: var(--radius-full);
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            z-index: 1;
            box-shadow: 0 4px 14px rgba(26,122,90,0.3);
        }

        .step-content {
            background: var(--surface);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            flex: 1;
            transition: all var(--transition-fast);
        }

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

        .step-content h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .step-content p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        .step-content .step-tip {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 8px;
            font-size: 0.84rem;
            color: var(--accent);
            font-weight: 500;
        }

        /* ===== Version Compare Table ===== */
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            background: var(--surface);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 640px;
        }

        .compare-table thead th {
            background: var(--primary-soft);
            padding: 16px 18px;
            font-weight: 700;
            font-size: 0.93rem;
            color: var(--text);
            text-align: left;
            border-bottom: 2px solid var(--primary-light);
            white-space: nowrap;
        }

        .compare-table thead th:first-child {
            border-radius: var(--radius-lg) 0 0 0;
        }

        .compare-table thead th:last-child {
            border-radius: 0 var(--radius-lg) 0 0;
        }

        .compare-table tbody td {
            padding: 14px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
            vertical-align: top;
        }

        .compare-table tbody tr:last-child td {
            border-bottom: none;
        }

        .compare-table tbody tr:hover td {
            background: #fafdfb;
        }

        .compare-table .check-icon {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.05rem;
        }

        .compare-table .dash-icon {
            color: var(--text-muted);
        }

        .table-highlight-col {
            background: #fdfefc;
        }

        /* ===== Safety Alert ===== */
        .safety-alert {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: #fffbeb;
            border: 1px solid #fde68a;
            border-radius: var(--radius-md);
            padding: 22px 26px;
            max-width: 760px;
            margin: 0 auto;
        }

        .safety-alert .alert-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-full);
            background: #fef3c7;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: #d97706;
        }

        .safety-alert .alert-content h4 {
            font-weight: 700;
            color: #92400e;
            margin-bottom: 4px;
            font-size: 1rem;
        }

        .safety-alert .alert-content p {
            font-size: 0.9rem;
            color: #a16207;
            line-height: 1.5;
        }

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

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

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

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            background: none;
            border: none;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            transition: color var(--transition-fast);
        }

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

        .faq-question .faq-arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: var(--radius-full);
            background: var(--surface-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: all var(--transition-fast);
            color: var(--text-muted);
        }

        .faq-item.open .faq-question .faq-arrow {
            background: var(--primary);
            color: #fff;
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(160deg, #1a5a42 0%, #1a7a5a 50%, #0f4d38 100%);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 0%, rgba(255,255,255,0.08) 0%, transparent 60%);
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 750;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.015em;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.82);
            max-width: 500px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.55;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-full);
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: all var(--transition-fast);
            border: none;
            background: var(--accent);
            color: #fff;
            box-shadow: 0 6px 22px rgba(232,135,58,0.4);
            text-decoration: none;
        }

        .btn-cta-large:hover {
            background: #f0963f;
            box-shadow: 0 8px 28px rgba(232,135,58,0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-cta-large:active {
            transform: translateY(0);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #1c1e21;
            color: #c5c8ce;
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: var(--spacing-lg);
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            font-size: 0.88rem;
            color: #9ca0a8;
            line-height: 1.6;
            max-width: 340px;
        }

        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #e0e2e6;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }

        .footer-links a {
            font-size: 0.88rem;
            color: #9ca0a8;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid #2e3035;
            padding-top: var(--spacing-md);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.82rem;
            color: #7a7e86;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .platform-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .header-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--surface);
                flex-direction: column;
                border-radius: 0;
                padding: 12px 16px;
                gap: 4px;
                box-shadow: var(--shadow-md);
                border-bottom: 2px solid var(--border-light);
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                border-radius: var(--radius-md);
                width: 100%;
                justify-content: center;
                padding: 12px 16px;
            }
            .mobile-menu-trigger {
                display: block;
            }
            .header-cta {
                display: none;
            }
            .header-cta.mobile-visible {
                display: inline-flex;
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .header-inner {
                flex-wrap: wrap;
            }
            .platform-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
            }
            .category-hero h1 {
                font-size: 1.75rem;
            }
            .category-hero .hero-subtitle {
                font-size: 1rem;
            }
            .hero-stats-row {
                gap: 20px;
            }
            .hero-stat .stat-number {
                font-size: 1.5rem;
            }
            .steps-timeline::before {
                left: 20px;
            }
            .step-number {
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
            .step-content {
                padding: 14px 16px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 32px 20px;
                border-radius: var(--radius-md);
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .safety-alert {
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .section {
                padding: var(--spacing-xl) 0;
            }
            .category-hero {
                padding: var(--spacing-xl) 0;
            }
            .category-hero h1 {
                font-size: 1.45rem;
            }
            .platform-card {
                padding: 20px 16px 18px;
            }
            .btn-card, .btn-card-outline {
                width: 100%;
                justify-content: center;
            }
            .compare-table thead th,
            .compare-table tbody td {
                padding: 10px 12px;
                font-size: 0.82rem;
            }
            .faq-question {
                font-size: 0.93rem;
                padding: 14px 16px;
            }
            .step-item {
                gap: 12px;
            }
        }

/* roulang page: article */
:root {
            --primary: #1a365d;
            --primary-light: #2c5282;
            --primary-dark: #0f2440;
            --accent: #c7923e;
            --accent-light: #d4a853;
            --accent-dark: #a6752e;
            --surface: #f8fafc;
            --surface-alt: #f1f5f9;
            --muted: #718096;
            --text-main: #1a202c;
            --text-soft: #4a5568;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-nav: 0 1px 3px rgba(0,0,0,0.04);
            --shadow-soft: 0 4px 20px rgba(0,0,0,0.05);
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            padding: 0;
            font-family: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: #ffffff;
            min-height: 100vh;
        }

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

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

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

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

        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            transition: all var(--transition-base);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .header-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: color var(--transition-base);
            flex-shrink: 0;
        }

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

        .header-logo i {
            color: var(--accent);
            margin-right: 6px;
            font-size: 1.1rem;
        }

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

        .header-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: all var(--transition-base);
            white-space: nowrap;
            position: relative;
        }

        .header-nav a:hover {
            color: var(--primary);
            background: var(--surface-alt);
        }

        .header-nav a.active {
            color: #ffffff;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(26,54,93,0.25);
        }

        .header-nav a.active:hover {
            background: var(--primary-light);
            color: #ffffff;
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--accent);
            white-space: nowrap;
            transition: all var(--transition-base);
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(199,146,62,0.3);
        }

        .header-cta:hover {
            background: var(--accent-dark);
            box-shadow: 0 4px 16px rgba(199,146,62,0.4);
            transform: translateY(-1px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition-base);
        }

        .mobile-menu-btn:hover {
            background: var(--surface-alt);
        }

        /* Article Banner */
        .article-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0 60px;
            overflow: hidden;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,54,93,0.88) 0%, rgba(15,36,64,0.82) 40%, rgba(26,54,93,0.78) 100%);
            z-index: 1;
        }

        .article-banner .banner-content {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 20px;
        }

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

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

        .breadcrumb .separator {
            color: rgba(255,255,255,0.5);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: #ffffff;
            font-weight: 500;
        }

        .article-banner .banner-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.3;
            margin: 0 0 16px;
            letter-spacing: -0.02em;
        }

        .article-banner .banner-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.85);
            font-size: 0.9rem;
        }

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

        .article-banner .banner-meta .meta-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(199,146,62,0.85);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.8rem;
            letter-spacing: 0.02em;
        }

        /* Article Main */
        .article-main {
            padding: 50px 0 60px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }

        .article-content-area {
            background: #ffffff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .article-featured-image {
            width: 100%;
            max-height: 440px;
            object-fit: cover;
            display: block;
        }

        .article-body {
            padding: 36px 40px 40px;
        }

        .article-body h1 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 16px;
            line-height: 1.35;
        }

        .article-body h2 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            margin: 32px 0 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border);
        }

        .article-body h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 24px 0 10px;
        }

        .article-body p {
            margin: 0 0 16px;
            color: var(--text-soft);
            line-height: 1.85;
        }

        .article-body ul, .article-body ol {
            margin: 12px 0 20px;
            padding-left: 24px;
            color: var(--text-soft);
        }

        .article-body li {
            margin-bottom: 8px;
            line-height: 1.75;
        }

        .article-body ul li::marker {
            color: var(--accent);
        }

        .article-body blockquote {
            margin: 24px 0;
            padding: 18px 24px;
            border-left: 4px solid var(--accent);
            background: #fefdf8;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-soft);
        }

        .article-body a {
            color: var(--accent-dark);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition-base);
        }

        .article-body a:hover {
            color: var(--accent);
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-soft);
        }

        .article-body code {
            background: var(--surface-alt);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary);
        }

        .article-body pre {
            background: #1a202c;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

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

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }

        .article-tags .tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 20px;
            background: var(--surface-alt);
            color: var(--text-soft);
            font-size: 0.82rem;
            font-weight: 500;
            transition: all var(--transition-base);
            cursor: default;
        }

        .article-tags .tag:hover {
            background: #e2e8f0;
            color: var(--text-main);
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 88px;
        }

        .sidebar-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 24px;
            border: 1px solid var(--border);
        }

        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--surface-alt);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--accent);
            font-size: 0.9rem;
        }

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

        .sidebar-card ul li {
            padding: 10px 0;
            border-bottom: 1px solid var(--surface-alt);
            transition: all var(--transition-base);
        }

        .sidebar-card ul li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .sidebar-card ul li a {
            color: var(--text-soft);
            font-size: 0.9rem;
            font-weight: 500;
            display: block;
            transition: all var(--transition-base);
            line-height: 1.45;
        }

        .sidebar-card ul li a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #ffffff;
            text-align: center;
        }

        .sidebar-cta h3 {
            color: #ffffff;
            border-bottom-color: rgba(255,255,255,0.2);
        }

        .sidebar-cta p {
            color: rgba(255,255,255,0.85);
            font-size: 0.88rem;
            margin: 0 0 16px;
            line-height: 1.6;
        }

        .sidebar-cta .btn-sidebar {
            display: inline-block;
            padding: 10px 24px;
            border-radius: 24px;
            background: var(--accent);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-base);
        }

        .sidebar-cta .btn-sidebar:hover {
            background: var(--accent-light);
            box-shadow: 0 4px 16px rgba(199,146,62,0.4);
        }

        /* Related Articles */
        .related-section {
            padding: 50px 0 60px;
            background: var(--surface);
        }

        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-align: center;
            margin: 0 0 36px;
        }

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

        .related-card {
            background: #ffffff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .related-card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }

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

        .related-card-body .card-category {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .related-card-body h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            margin: 0 0 8px;
            line-height: 1.4;
            flex-grow: 1;
        }

        .related-card-body .card-date {
            font-size: 0.8rem;
            color: var(--muted);
            margin-top: auto;
        }

        .related-card-body a {
            color: inherit;
            transition: color var(--transition-base);
        }

        .related-card-body a:hover h4 {
            color: var(--primary);
        }

        /* Not Found */
        .not-found-area {
            text-align: center;
            padding: 60px 24px;
        }

        .not-found-area .nf-icon {
            font-size: 4rem;
            color: var(--muted);
            margin-bottom: 20px;
        }

        .not-found-area h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 12px;
        }

        .not-found-area p {
            color: var(--text-soft);
            margin: 0 0 24px;
            font-size: 1rem;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 24px;
            background: var(--primary);
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
        }

        .btn-back:hover {
            background: var(--primary-light);
            box-shadow: 0 4px 16px rgba(26,54,93,0.3);
            transform: translateY(-1px);
        }

        /* CTA Section */
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            text-align: center;
            color: #ffffff;
        }

        .cta-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            margin: 0 0 14px;
        }

        .cta-section p {
            color: rgba(255,255,255,0.85);
            margin: 0 0 28px;
            font-size: 1rem;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 28px;
            background: var(--accent);
            color: #ffffff;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-base);
            box-shadow: 0 6px 20px rgba(199,146,62,0.35);
        }

        .btn-cta:hover {
            background: var(--accent-light);
            box-shadow: 0 8px 28px rgba(199,146,62,0.5);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 50px 0 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .footer-brand p {
            color: #94a3b8;
            line-height: 1.7;
            margin: 0;
            font-size: 0.88rem;
        }

        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #ffffff;
            margin: 0 0 14px;
        }

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

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

        .footer-links ul li a {
            color: #94a3b8;
            transition: color var(--transition-base);
            font-size: 0.88rem;
        }

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

        .footer-bottom {
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: #64748b;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 28px;
            }
            .article-body {
                padding: 28px 28px 32px;
            }
            .article-banner .banner-title {
                font-size: 1.8rem;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .header-nav {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-card);
                z-index: 999;
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                width: 100%;
                justify-content: center;
                padding: 12px 16px;
                border-radius: 12px;
                font-size: 0.95rem;
            }
            .mobile-menu-btn {
                display: block;
            }
            .header-cta {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .header-logo {
                font-size: 1.05rem;
            }
            .article-layout {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-sidebar {
                position: static;
                flex-direction: column;
            }
            .article-banner {
                padding: 50px 0 40px;
            }
            .article-banner .banner-title {
                font-size: 1.45rem;
            }
            .article-body {
                padding: 20px 18px 28px;
            }
            .article-body h1 {
                font-size: 1.4rem;
            }
            .article-body h2 {
                font-size: 1.15rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .related-card-image {
                height: 200px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .article-banner .banner-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .container-narrow {
                padding: 0 16px;
            }
            .header-inner {
                height: 56px;
                gap: 10px;
            }
            .header-logo {
                font-size: 0.95rem;
            }
            .header-cta {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
            .article-banner {
                padding: 36px 0 28px;
            }
            .article-banner .banner-title {
                font-size: 1.2rem;
            }
            .article-body {
                padding: 16px 14px 22px;
            }
            .article-body h1 {
                font-size: 1.2rem;
            }
            .article-body h2 {
                font-size: 1.05rem;
            }
            .sidebar-card {
                padding: 18px;
            }
            .related-section .section-title {
                font-size: 1.2rem;
            }
            .cta-section {
                padding: 40px 16px;
            }
            .cta-section h2 {
                font-size: 1.2rem;
            }
            .btn-cta {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
        }