/* roulang page: index */
:root {
            --primary: #4a30d9;
            --primary-dark: #3620a8;
            --primary-light: #7c6aeb;
            --accent: #ff6b35;
            --accent-dark: #e55a28;
            --accent-glow: #ff8c5a;
            --gold: #f0c040;
            --gold-dark: #d4a830;
            --bg: #f8f9fc;
            --bg-alt: #eef0f7;
            --surface: #ffffff;
            --text: #1a1a2e;
            --text-secondary: #5a5d6e;
            --text-muted: #8b8fa3;
            --border: #e2e4ed;
            --border-light: #eef0f6;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06);
            --shadow: 0 2px 8px rgba(26, 26, 46, 0.08);
            --shadow-md: 0 6px 20px rgba(26, 26, 46, 0.10);
            --shadow-lg: 0 12px 32px rgba(26, 26, 46, 0.12);
            --shadow-xl: 0 20px 48px rgba(26, 26, 46, 0.15);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        *,
        *::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-color: var(--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;
            font-size: inherit;
            border: none;
            background: none;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== HEADER / NAV ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: box-shadow var(--transition), background var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.97);
        }

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

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            transition: color var(--transition-fast);
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(74, 48, 217, 0.3);
        }

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

        .nav-links a.nav-item {
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a.nav-item:hover {
            color: var(--primary);
            background: rgba(74, 48, 217, 0.05);
        }

        .nav-links a.nav-item.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(74, 48, 217, 0.07);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            background: linear-gradient(135deg, var(--accent), var(--accent-glow));
            color: #fff !important;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
            transition: all var(--transition);
            letter-spacing: 0.01em;
        }

        .nav-cta:hover {
            background: linear-gradient(135deg, var(--accent-dark), var(--accent));
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.45);
            transform: translateY(-1px);
            color: #fff !important;
        }

        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
        }

        .mobile-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

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

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

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

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: calc(var(--nav-height) + 48px) 24px 72px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 26, 46, 0.72) 0%, rgba(26, 26, 46, 0.55) 40%, rgba(26, 26, 46, 0.68) 100%);
            z-index: 1;
        }

        .hero .hero-overlay-pattern {
            position: absolute;
            inset: 0;
            z-index: 2;
            background: radial-gradient(ellipse at 30% 40%, rgba(74, 48, 217, 0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 55%, rgba(255, 107, 53, 0.18) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 70%, rgba(240, 192, 64, 0.12) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 720px;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 50px;
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
            letter-spacing: 0.02em;
        }

        .hero-badge i {
            margin-right: 6px;
            color: var(--gold);
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--gold), #ffe08a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            letter-spacing: 0.01em;
            white-space: nowrap;
            cursor: pointer;
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-glow));
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
        }

        .btn-primary:hover {
            box-shadow: 0 10px 28px rgba(255, 107, 53, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

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

        .btn-outline {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
            backdrop-filter: blur(6px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.08rem;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 72px 0;
        }

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

        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(74, 48, 217, 0.08);
            padding: 5px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 540px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 36px 28px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

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

        .feature-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius);
            margin-bottom: 20px;
        }

        .feature-card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            box-shadow: 0 4px 12px rgba(74, 48, 217, 0.25);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

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

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-block {
            background: var(--surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            display: flex;
            align-items: stretch;
            transition: all var(--transition);
        }

        .category-entry-block:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .category-entry-img {
            flex: 0 0 42%;
            min-height: 280px;
            object-fit: cover;
        }

        .category-entry-body {
            flex: 1;
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .category-entry-body .tag {
            display: inline-block;
            background: rgba(74, 48, 217, 0.08);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
            width: fit-content;
        }

        .category-entry-body h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .category-entry-body p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
            border-radius: 50px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
            width: fit-content;
        }

        .btn-sm.btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(74, 48, 217, 0.3);
        }

        .btn-sm.btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 18px rgba(74, 48, 217, 0.4);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--surface);
            border-radius: var(--radius);
            padding: 18px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .news-item:hover {
            box-shadow: var(--shadow);
            border-color: var(--border);
            transform: translateX(3px);
        }

        .news-item-date {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
            font-size: 0.85rem;
            line-height: 1.2;
        }

        .news-item-date .day {
            font-size: 1.3rem;
            font-weight: 800;
        }

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

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

        .news-item-info .news-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-item-arrow {
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .news-item:hover .news-item-arrow {
            color: var(--primary);
            transform: translateX(3px);
        }

        .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

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

        .stat-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

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

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

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

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

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

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

        .faq-item summary {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            list-style: none;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item[open] summary {
            color: var(--primary);
            background: rgba(74, 48, 217, 0.03);
        }

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.93rem;
            line-height: 1.7;
        }

        /* ========== CTA BANNER ========== */
        .cta-banner {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-xl);
            padding: 52px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 75% 30%, rgba(240, 192, 64, 0.15) 0%, transparent 50%);
            pointer-events: none;
        }

        .cta-banner h3 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-banner .btn {
            position: relative;
            z-index: 1;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #1a1a2e;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 28px;
        }

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

        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

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

        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 22px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .category-entry-block {
                flex-direction: column;
            }

            .category-entry-img {
                flex: 0 0 200px;
                min-height: 200px;
                width: 100%;
            }

            .hero-title {
                font-size: 2.4rem;
            }

            .section-title {
                font-size: 1.7rem;
            }

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

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: #fff;
                flex-direction: column;
                padding: 88px 24px 30px;
                gap: 4px;
                box-shadow: var(--shadow-xl);
                transition: right var(--transition-slow);
                z-index: 1000;
                align-items: stretch;
            }

            .nav-links.open {
                right: 0;
            }

            .nav-links a.nav-item {
                padding: 14px 18px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                margin-top: 10px;
                text-align: center;
                justify-content: center;
                border-radius: var(--radius-sm);
            }

            .mobile-toggle {
                display: flex;
            }

            .mobile-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.4);
                z-index: 999;
            }

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

            .hero {
                min-height: 500px;
                padding-top: calc(var(--nav-height) + 32px);
                padding-bottom: 56px;
            }

            .hero-title {
                font-size: 1.9rem;
            }

            .hero-desc {
                font-size: 0.98rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
                max-width: 420px;
                margin: 0 auto;
            }

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-card {
                padding: 22px 14px;
            }

            .stat-number {
                font-size: 1.8rem;
            }

            .section {
                padding: 52px 0;
            }

            .section-title {
                font-size: 1.45rem;
            }

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

            .cta-banner h3 {
                font-size: 1.35rem;
            }

            .news-item {
                flex-wrap: wrap;
                gap: 10px;
            }

            .news-item-date {
                width: 48px;
                height: 48px;
                font-size: 0.75rem;
            }

            .news-item-date .day {
                font-size: 1.1rem;
            }

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

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
                justify-content: center;
            }

            .btn {
                padding: 12px 24px;
                font-size: 0.93rem;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.55rem;
            }

            .hero-desc {
                font-size: 0.9rem;
            }

            .hero-badge {
                font-size: 0.75rem;
                padding: 5px 12px;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .section-subtitle {
                font-size: 0.9rem;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 1.5rem;
            }

            .stat-label {
                font-size: 0.8rem;
            }

            .feature-card {
                padding: 24px 18px 20px;
            }

            .feature-card-img {
                height: 140px;
            }

            .news-item {
                padding: 14px 16px;
            }

            .news-item-info h4 {
                font-size: 0.9rem;
            }

            .category-entry-body {
                padding: 24px 20px;
            }

            .category-entry-body h3 {
                font-size: 1.2rem;
            }

            .container {
                padding: 0 16px;
            }

            .faq-item summary {
                padding: 16px 18px;
                font-size: 0.93rem;
            }

            .faq-item .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.85rem;
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.5s ease forwards;
        }

/* roulang page: article */
:root {
            --primary: #5b3cc4;
            --primary-dark: #4a2db5;
            --primary-light: #7c5fe0;
            --accent: #ff6b35;
            --accent-hover: #e85a28;
            --teal: #00b4d8;
            --teal-light: #e0f7fc;
            --success: #06d6a0;
            --bg: #f5f3ff;
            --bg-white: #ffffff;
            --bg-dark: #1e1b2e;
            --text: #1e1b2e;
            --text-secondary: #5a5672;
            --text-muted: #8b87a3;
            --border: #e8e5f2;
            --border-light: #f0edf8;
            --radius-xl: 16px;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 6px;
            --radius-full: 999px;
            --shadow-sm: 0 1px 4px rgba(30, 27, 46, 0.05);
            --shadow-md: 0 4px 16px rgba(30, 27, 46, 0.07);
            --shadow-lg: 0 8px 32px rgba(30, 27, 46, 0.10);
            --shadow-xl: 0 16px 48px rgba(30, 27, 46, 0.13);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --max-width: 1200px;
            --nav-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: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button, input, 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 & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            transition: box-shadow var(--transition);
        }

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

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 24px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-logo i {
            font-size: 1.5rem;
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .nav-item {
            padding: 8px 18px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-item:hover {
            color: var(--primary);
            background: rgba(91, 60, 196, 0.06);
        }

        .nav-item.active {
            color: var(--primary);
            background: rgba(91, 60, 196, 0.10);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: var(--radius-full);
            font-size: 0.95rem;
            font-weight: 600;
            background: var(--accent);
            color: #fff;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 10px rgba(255, 107, 53, 0.30);
            margin-left: 6px;
        }

        .nav-cta:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 18px rgba(255, 107, 53, 0.40);
            transform: translateY(-1px);
            color: #fff;
        }

        .nav-cta i {
            font-size: 0.9rem;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
            z-index: 1001;
            flex-shrink: 0;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 3px;
            transition: all var(--transition);
        }

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

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

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

        /* ========== BREADCRUMB ========== */
        .breadcrumb-wrap {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 14px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .separator {
            color: var(--border);
            font-size: 0.7rem;
        }

        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ========== ARTICLE LAYOUT ========== */
        .article-page {
            flex: 1;
            padding: 36px 0 48px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 36px;
            align-items: start;
        }

        .article-main {
            min-width: 0;
        }

        .article-sidebar {
            position: sticky;
            top: calc(var(--nav-height) + 28px);
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        /* ========== ARTICLE HEADER ========== */
        .article-header-card {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .article-featured-image {
            width: 100%;
            aspect-ratio: 16 / 7;
            object-fit: cover;
            display: block;
            background: linear-gradient(135deg, #e8e5f2 0%, #f0edf8 50%, #e0f7fc 100%);
        }

        .article-header-body {
            padding: 28px 32px 24px;
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(91, 60, 196, 0.08);
            color: var(--primary);
            margin-bottom: 14px;
            letter-spacing: 0.01em;
        }

        .article-category-badge i {
            font-size: 0.7rem;
        }

        .article-title-h1 {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.015em;
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--text-muted);
            padding-top: 8px;
            border-top: 1px solid var(--border-light);
        }

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

        .article-meta-row i {
            font-size: 0.8rem;
            color: var(--primary-light);
        }

        /* ========== ARTICLE CONTENT ========== */
        .article-body-card {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            margin-top: 20px;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-content h2 {
            font-size: 1.4rem;
            font-weight: 700;
            margin: 32px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-light);
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .article-content h2:first-child {
            margin-top: 0;
        }

        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 24px 0 12px;
            color: var(--text);
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content p:last-child {
            margin-bottom: 0;
        }

        .article-content ul,
        .article-content ol {
            margin: 12px 0 20px;
            padding-left: 24px;
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content img {
            border-radius: var(--radius-lg);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary-light);
            background: rgba(91, 60, 196, 0.03);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary);
            font-style: italic;
        }

        .article-content code {
            background: #f4f2fa;
            padding: 3px 8px;
            border-radius: var(--radius-sm);
            font-size: 0.9em;
            color: var(--primary-dark);
            font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
        }

        .article-content pre {
            background: var(--bg-dark);
            color: #e0ddf0;
            padding: 20px 24px;
            border-radius: var(--radius-lg);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

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

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content a:hover {
            color: var(--primary-dark);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 0.95rem;
        }

        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content th {
            background: rgba(91, 60, 196, 0.05);
            font-weight: 600;
            color: var(--text);
        }

        .article-content tr:nth-child(even) td {
            background: rgba(245, 243, 255, 0.5);
        }

        /* ========== ARTICLE TAGS ========== */
        .article-tags-section {
            margin-top: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .article-tags-section .tags-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            flex-shrink: 0;
        }

        .article-tag {
            display: inline-block;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            background: var(--bg);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: default;
        }

        .article-tag:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: rgba(91, 60, 196, 0.04);
        }

        /* ========== ARTICLE FOOTER NAV ========== */
        .article-footer-nav {
            margin-top: 20px;
            padding: 20px 0;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--bg);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }

        .btn-back:hover {
            background: var(--bg-white);
            border-color: var(--primary-light);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .btn-back i {
            font-size: 0.8rem;
        }

        /* ========== SIDEBAR ========== */
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .sidebar-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h4 i {
            color: var(--accent);
            font-size: 0.9rem;
        }

        .sidebar-post-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-post-item {
            display: flex;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-md);
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .sidebar-post-item:hover {
            background: rgba(91, 60, 196, 0.03);
            border-color: var(--border-light);
        }

        .sidebar-post-thumb {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg);
        }

        .sidebar-post-info {
            min-width: 0;
        }

        .sidebar-post-title {
            font-size: 0.85rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }

        .sidebar-post-item:hover .sidebar-post-title {
            color: var(--primary);
        }

        .sidebar-post-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .sidebar-empty {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            padding: 20px 0;
        }

        .sidebar-info-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .sidebar-info-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .sidebar-info-item:last-child {
            border-bottom: none;
        }

        .sidebar-info-item i {
            color: var(--primary-light);
            width: 20px;
            text-align: center;
            font-size: 0.85rem;
        }

        /* ========== NOT FOUND ========== */
        .not-found-section {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .not-found-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            opacity: 0.5;
        }

        .not-found-section h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .not-found-section p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 1rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 0.95rem;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(91, 60, 196, 0.30);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 22px rgba(91, 60, 196, 0.40);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-dark);
            color: #c5c1d9;
            padding: 48px 0 24px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .footer-logo i {
            color: var(--accent);
            font-size: 1.3rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #a8a3c2;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

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

        .footer-col ul li a {
            color: #a8a3c2;
            font-size: 0.9rem;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #7a7599;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 24px;
            }
            .article-title-h1 {
                font-size: 1.5rem;
            }
            .article-body-card {
                padding: 24px;
            }
            .article-header-body {
                padding: 22px 24px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                flex-direction: column;
                background: var(--bg-white);
                padding: 90px 28px 32px;
                gap: 4px;
                box-shadow: var(--shadow-xl);
                transition: right var(--transition);
                z-index: 999;
                align-items: stretch;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-item {
                padding: 12px 18px;
                border-radius: var(--radius-md);
                font-size: 1rem;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
                text-align: center;
                border-radius: var(--radius-md);
                padding: 13px 22px;
            }
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                top: auto;
            }
            .article-title-h1 {
                font-size: 1.35rem;
            }
            .article-body-card {
                padding: 20px;
            }
            .article-header-body {
                padding: 18px 20px 16px;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-content h2 {
                font-size: 1.25rem;
            }
            .article-meta-row {
                gap: 12px;
                font-size: 0.8rem;
            }
            .article-featured-image {
                aspect-ratio: 16 / 9;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .not-found-section {
                padding: 50px 20px;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .breadcrumb .current {
                max-width: 180px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-page {
                padding: 20px 0 32px;
            }
            .article-title-h1 {
                font-size: 1.2rem;
            }
            .article-body-card {
                padding: 16px;
                border-radius: var(--radius-lg);
            }
            .article-header-card {
                border-radius: var(--radius-lg);
            }
            .article-header-body {
                padding: 14px 16px 12px;
            }
            .article-featured-image {
                aspect-ratio: 16 / 10;
            }
            .article-meta-row {
                gap: 8px;
                font-size: 0.75rem;
            }
            .article-content {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .article-content h2 {
                font-size: 1.15rem;
                margin: 22px 0 12px;
            }
            .article-content blockquote {
                padding: 12px 16px;
            }
            .article-content pre {
                padding: 14px 16px;
                font-size: 0.8rem;
            }
            .sidebar-card {
                padding: 18px;
                border-radius: var(--radius-lg);
            }
            .btn-back {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .article-footer-nav {
                flex-direction: column;
                align-items: flex-start;
            }
            .site-footer {
                padding: 32px 0 20px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #6366F1;
            --primary-dark: #4F46E5;
            --primary-light: #818CF8;
            --accent: #F59E0B;
            --accent-dark: #D97706;
            --dark: #1E1B4B;
            --dark-light: #312E81;
            --surface: #F8FAFC;
            --surface-alt: #EEF2FF;
            --text-main: #1F2937;
            --text-soft: #6B7280;
            --text-muted: #9CA3AF;
            --border-light: #E5E7EB;
            --border-soft: #F3F4F6;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-card-hover: 0 2px 6px rgba(0, 0, 0, 0.08), 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-nav: 0 1px 3px rgba(0, 0, 0, 0.05), 0 2px 8px rgba(0, 0, 0, 0.03);
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s ease;
        }

        *,
        *::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", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: #ffffff;
            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-fast);
        }

        button {
            cursor: pointer;
            font-family: inherit;
        }

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

        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 1280px) {
            .container {
                max-width: 1240px;
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        /* ========== HEADER & NAV ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-soft);
            box-shadow: var(--shadow-nav);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--dark);
            white-space: nowrap;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .logo-link i {
            font-size: 1.5rem;
            color: var(--primary);
            transition: color var(--transition-fast), transform var(--transition-smooth);
        }

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

        .logo-link:hover i {
            color: var(--primary-dark);
            transform: rotate(-6deg) scale(1.08);
        }

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

        .nav-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.938rem;
            font-weight: 500;
            color: var(--text-soft);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

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

        .nav-item.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--surface-alt);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 22px;
            border-radius: 999px;
            font-size: 0.938rem;
            font-weight: 600;
            color: #ffffff;
            background: var(--primary);
            white-space: nowrap;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-btn);
            margin-left: 4px;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-1px);
            color: #ffffff;
        }

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

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

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-main);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            line-height: 1;
        }

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

        @media (max-width: 768px) {
            .header-inner {
                height: 56px;
                gap: 16px;
            }
            .logo-link {
                font-size: 1.1rem;
            }
            .logo-link i {
                font-size: 1.3rem;
            }
            .nav-links {
                position: fixed;
                top: 56px;
                left: 0;
                right: 0;
                background: #ffffff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 20px 20px 20px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: transform var(--transition-smooth), opacity var(--transition-smooth);
                z-index: 999;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-item,
            .nav-cta {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
                margin: 0;
                justify-content: center;
                text-align: center;
            }
            .nav-item.active::after {
                display: none;
            }
            .nav-item.active {
                border-left: 3px solid var(--primary);
                border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 6px;
                border-radius: var(--radius-md);
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 52px;
                padding-left: 4px;
                padding-right: 4px;
            }
            .logo-link {
                font-size: 1rem;
                gap: 6px;
            }
            .logo-link i {
                font-size: 1.15rem;
            }
            .nav-links {
                top: 52px;
                padding: 6px 14px 16px 14px;
            }
            .nav-item,
            .nav-cta {
                padding: 10px 14px;
                font-size: 0.938rem;
            }
        }

        /* ========== MAIN ========== */
        .site-main {
            flex: 1;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-bar {
            background: var(--surface);
            border-bottom: 1px solid var(--border-soft);
            padding: 12px 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
            font-size: 0.875rem;
            color: var(--text-soft);
        }

        .breadcrumb-list li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb-list a {
            color: var(--text-soft);
            transition: color var(--transition-fast);
        }

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

        .breadcrumb-list .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

        .breadcrumb-list .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== CATEGORY BANNER ========== */
        .category-banner {
            position: relative;
            padding: 72px 0 64px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 40%, #4338CA 100%);
            overflow: hidden;
            color: #ffffff;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }

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

        .category-banner-content {
            max-width: 720px;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .category-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 16px;
            letter-spacing: -0.02em;
        }

        .category-banner .banner-desc {
            font-size: 1.1rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 28px;
            max-width: 560px;
        }

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

        .banner-stat-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .banner-stat-item .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
        }

        .banner-stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.3;
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: 48px 0 40px;
            }
            .category-banner h1 {
                font-size: 1.9rem;
            }
            .category-banner .banner-desc {
                font-size: 1rem;
            }
            .banner-stats {
                gap: 20px;
            }
            .banner-stat-item .stat-num {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .category-banner {
                padding: 36px 0 32px;
            }
            .category-banner h1 {
                font-size: 1.55rem;
            }
            .category-banner .banner-desc {
                font-size: 0.938rem;
            }
            .banner-stats {
                gap: 14px;
                flex-direction: column;
            }
            .banner-stat-item .stat-num {
                font-size: 1.4rem;
            }
        }

        /* ========== SECTION COMMON ========== */
        .section {
            padding: 60px 0;
        }

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

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--dark);
            margin: 0 0 10px;
            letter-spacing: -0.01em;
        }

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

        @media (max-width: 768px) {
            .section {
                padding: 44px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header {
                margin-bottom: 28px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 34px 0;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
        }

        /* ========== TAG CLOUD / QUICK INDEX ========== */
        .tag-cloud-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 9px 18px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-soft);
            background: #ffffff;
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .tag-pill:hover {
            color: var(--primary);
            border-color: var(--primary-light);
            background: var(--surface-alt);
            transform: translateY(-1px);
            box-shadow: 0 2px 8px rgba(99, 102, 241, 0.12);
        }

        .tag-pill i {
            font-size: 0.8rem;
            color: var(--primary-light);
        }

        /* ========== GUIDE CARDS GRID ========== */
        .guide-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .guide-card {
            background: #ffffff;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-soft);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        .guide-card-image .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 5px 12px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--accent);
            color: #ffffff;
            z-index: 1;
            letter-spacing: 0.02em;
        }

        .guide-card-body {
            padding: 20px 20px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--dark);
            margin: 0 0 8px;
            line-height: 1.4;
            letter-spacing: -0.01em;
        }

        .guide-card-body .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-soft);
            line-height: 1.6;
            margin: 0 0 14px;
            flex: 1;
        }

        .guide-card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-soft);
        }

        .guide-card-body .card-meta i {
            font-size: 0.75rem;
        }

        .card-read-more {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition-fast), color var(--transition-fast);
            margin-top: auto;
            padding-top: 10px;
        }

        .card-read-more:hover {
            gap: 9px;
            color: var(--primary-dark);
        }

        @media (max-width: 1024px) {
            .guide-cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .guide-cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-card-body {
                padding: 16px;
            }
            .guide-card-body h3 {
                font-size: 1.05rem;
            }
        }

        /* ========== STEP GUIDE ========== */
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
            max-width: 800px;
            margin: 0 auto;
        }

        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: #ffffff;
            border-radius: var(--radius-xl);
            padding: 24px 28px;
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-smooth);
        }

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

        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            line-height: 1;
        }

        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark);
            margin: 0 0 6px;
            letter-spacing: -0.01em;
        }

        .step-content p {
            font-size: 0.938rem;
            color: var(--text-soft);
            margin: 0;
            line-height: 1.65;
        }

        @media (max-width: 600px) {
            .step-item {
                flex-direction: column;
                gap: 12px;
                padding: 18px 20px;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1.05rem;
            }
            .step-content h4 {
                font-size: 1rem;
            }
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-soft);
            box-shadow: var(--shadow-card);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 640px;
            font-size: 0.938rem;
        }

        .comparison-table thead th {
            background: var(--surface-alt);
            padding: 16px 20px;
            text-align: left;
            font-weight: 700;
            color: var(--dark);
            font-size: 0.9rem;
            letter-spacing: 0.01em;
            border-bottom: 2px solid var(--border-light);
            white-space: nowrap;
        }

        .comparison-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-soft);
            color: var(--text-soft);
            vertical-align: top;
        }

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

        .comparison-table tbody tr:hover {
            background: #FAFBFF;
        }

        .comparison-table .method-name {
            font-weight: 600;
            color: var(--dark);
            white-space: nowrap;
        }

        .comparison-table .badge-cell {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 600;
            white-space: nowrap;
        }

        .badge-fast {
            background: #DCFCE7;
            color: #166534;
        }

        .badge-secure {
            background: #EEF2FF;
            color: #3730A3;
        }

        .badge-standard {
            background: #FEF3C7;
            color: #92400E;
        }

        @media (max-width: 768px) {
            .comparison-table-wrap {
                margin-left: -20px;
                margin-right: -20px;
                border-radius: 0;
                border-left: none;
                border-right: none;
            }
            .comparison-table {
                min-width: 560px;
                font-size: 0.85rem;
            }
            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 10px 14px;
            }
        }

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

        .faq-item {
            background: #ffffff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-soft);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 22px;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--dark);
            text-align: left;
            cursor: pointer;
            transition: color var(--transition-fast);
            line-height: 1.5;
        }

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

        .faq-question i {
            flex-shrink: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition-smooth), color var(--transition-fast);
        }

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

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

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

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.938rem;
            color: var(--text-soft);
            line-height: 1.7;
        }

        @media (max-width: 600px) {
            .faq-question {
                padding: 15px 16px;
                font-size: 0.938rem;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 0.88rem;
            }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 60%, #4338CA 100%);
            position: relative;
            overflow: hidden;
            color: #ffffff;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            z-index: 0;
        }

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

        .cta-inner {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 800;
            margin: 0 0 12px;
            letter-spacing: -0.02em;
        }

        .cta-inner p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 28px;
            line-height: 1.65;
        }

        .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 15px 36px;
            border-radius: 999px;
            font-size: 1.05rem;
            font-weight: 700;
            background: var(--accent);
            color: #ffffff;
            border: none;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            letter-spacing: 0.01em;
        }

        .btn-cta-large:hover {
            background: var(--accent-dark);
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.45);
            transform: translateY(-2px);
            color: #ffffff;
        }

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

        @media (max-width: 600px) {
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .cta-inner p {
                font-size: 0.95rem;
            }
            .btn-cta-large {
                padding: 13px 28px;
                font-size: 0.95rem;
            }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #111827;
            color: #D1D5DB;
            padding: 48px 0 24px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-logo i {
            color: var(--primary-light);
            font-size: 1.3rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.65;
            color: #9CA3AF;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            margin: 0 0 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.9rem;
            color: #9CA3AF;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid #374151;
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #6B7280;
        }

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

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .site-footer {
                padding: 36px 0 20px;
            }
        }

        /* ========== UTILITY ========== */
        .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;
        }

        @media (max-width: 768px) {
            .hide-mobile {
                display: none !important;
            }
        }