/* roulang page: index */
:root {
            --primary: #1e3a5f;
            --primary-light: #2d5a87;
            --primary-dark: #0f2440;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.08);
            --shadow-xl: 0 24px 48px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 1rem;
            }
        }
        /* header & nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            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;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }
        .nav-links a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.08);
            font-weight: 600;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            border-radius: 999px;
            padding: 0.3rem 0.3rem 0.3rem 1rem;
            transition: all var(--transition);
            max-width: 200px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
        }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 0.35rem 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100px;
            min-width: 0;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search button {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 999px;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition);
            flex-shrink: 0;
        }
        .nav-search button:hover {
            background: var(--primary-light);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.25rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            background: var(--primary);
            color: #fff;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
        }
        .btn-accent:hover {
            background: var(--accent-light);
            color: #0f172a;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.25rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--border-medium);
            cursor: pointer;
            transition: all var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            background: rgba(30, 58, 95, 0.04);
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem;
        }
        @media (max-width: 868px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(14px);
                flex-direction: column;
                padding: 1rem 1.25rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                gap: 0.25rem;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 0.75rem 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: block;
            }
            .nav-search {
                max-width: 140px;
            }
            .nav-search input {
                width: 70px;
            }
            .nav-right .btn-primary span {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .logo {
                font-size: 1.1rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .nav-search {
                max-width: 110px;
            }
            .nav-search input {
                width: 50px;
            }
            .btn-primary {
                padding: 0.45rem 0.9rem;
                font-size: 0.8rem;
            }
        }
        /* hero */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f2440 0%, #1e3a5f 40%, #2d5a87 70%, #1a3a5c 100%);
            overflow: hidden;
            padding: 4rem 0 5rem;
        }
        .hero-bg-pattern {
            position: absolute;
            inset: 0;
            opacity: 0.15;
            background-image: radial-gradient(circle at 25% 40%, rgba(255,255,255,0.3) 0%, transparent 50%),
                              radial-gradient(circle at 75% 60%, rgba(245,158,11,0.2) 0%, transparent 50%),
                              radial-gradient(circle at 50% 80%, rgba(255,255,255,0.1) 0%, transparent 40%);
            pointer-events: none;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,36,64,0.3) 0%, transparent 40%, transparent 70%, rgba(15,36,64,0.6) 100%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255,255,255,0.15);
            padding: 0.35rem 1rem 0.35rem 0.75rem;
            border-radius: 999px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.85);
            margin-bottom: 1.5rem;
            font-weight: 500;
        }
        .hero-kicker i {
            color: var(--accent);
        }
        .hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.03em;
            margin-bottom: 1.25rem;
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--accent-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.75);
            line-height: 1.7;
            max-width: 580px;
            margin-bottom: 2rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }
        .hero-actions .btn-primary {
            padding: 0.75rem 2rem;
            font-size: 1.05rem;
            background: var(--accent);
            color: #0f172a;
            font-weight: 700;
        }
        .hero-actions .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(245,158,11,0.35);
        }
        .hero-actions .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.3);
            cursor: pointer;
            transition: all var(--transition);
        }
        .hero-actions .btn-outline-light:hover {
            border-color: rgba(255,255,255,0.6);
            background: rgba(255,255,255,0.08);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat {
            text-align: left;
        }
        .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            font-weight: 400;
        }
        @media (max-width: 868px) {
            .hero {
                min-height: 440px;
                padding: 3rem 0 4rem;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 1.5rem;
                flex-wrap: wrap;
            }
            .hero-stat .num {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.7rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline-light {
                justify-content: center;
                text-align: center;
            }
            .hero-stats {
                gap: 1rem;
            }
            .hero-stat {
                flex: 1;
                min-width: 80px;
            }
        }
        /* sections general */
        .section {
            padding: 4.5rem 0;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 580px;
            margin-bottom: 2.5rem;
        }
        .section-title-center {
            text-align: center;
        }
        .section-subtitle-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        @media (max-width: 768px) {
            .section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
        }
        /* cards grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 1.75rem;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border-medium);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 1.25rem;
            color: #fff;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .card .badge {
            display: inline-block;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
            margin-top: 0.75rem;
        }
        @media (max-width: 868px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card {
                padding: 1.25rem;
            }
        }
        /* info list / news list */
        .info-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1rem;
        }
        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 1.25rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .info-item:hover {
            border-color: var(--border-medium);
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }
        .info-item .tag {
            flex-shrink: 0;
            padding: 0.2rem 0.8rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(245, 158, 11, 0.12);
            color: #92400e;
            white-space: nowrap;
        }
        .info-item .content {
            flex: 1;
            min-width: 0;
        }
        .info-item .content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.25rem;
            color: var(--text-primary);
        }
        .info-item .content h4 a {
            transition: color var(--transition);
        }
        .info-item .content h4 a:hover {
            color: var(--primary-light);
        }
        .info-item .content p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .info-item .meta {
            flex-shrink: 0;
            font-size: 0.8rem;
            color: var(--text-muted);
            white-space: nowrap;
            margin-left: 0.5rem;
        }
        @media (max-width: 768px) {
            .info-item {
                flex-direction: column;
                gap: 0.5rem;
                padding: 1rem 1.25rem;
            }
            .info-item .meta {
                margin-left: 0;
            }
        }
        /* steps / process */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border-light);
            text-align: center;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .step-card .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            margin: 0 auto 1rem;
        }
        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        @media (max-width: 868px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }
        /* faq */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-medium);
        }
        .faq-question {
            padding: 1.1rem 1.5rem;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(30, 58, 95, 0.03);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.1rem;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        /* cta */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            padding: 4rem 0;
            border-radius: var(--radius-xl);
            margin: 0 1.25rem;
        }
        .cta-inner {
            text-align: center;
            max-width: 600px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-inner p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 1.75rem;
        }
        .cta-inner .btn-primary {
            background: var(--accent);
            color: #0f172a;
            padding: 0.8rem 2.5rem;
            font-size: 1.05rem;
            font-weight: 700;
        }
        .cta-inner .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(245,158,11,0.3);
        }
        @media (max-width: 768px) {
            .cta-section {
                margin: 0 1rem;
                padding: 3rem 0;
                border-radius: var(--radius-lg);
            }
            .cta-inner h2 {
                font-size: 1.5rem;
            }
            .cta-inner p {
                font-size: 0.95rem;
            }
        }
        /* footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 3.5rem 0 2rem;
            margin-top: 4rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .footer-brand .logo .logo-icon {
            background: var(--accent);
            color: #0f172a;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 300px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul a {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.55);
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: rgba(255,255,255,0.9);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 1.5rem;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: rgba(255,255,255,0.8);
        }
        .footer-social {
            display: flex;
            gap: 0.75rem;
        }
        .footer-social a {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            transition: all var(--transition);
            font-size: 0.9rem;
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #0f172a;
            transform: translateY(-2px);
        }
        @media (max-width: 868px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        /* category page */
        .category-hero {
            background: linear-gradient(135deg, #eef2f7, #e2e8f0);
            padding: 3rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .category-hero h1 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .category-hero p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
        }
        /* article page */
        .article-header {
            padding: 3rem 0 1.5rem;
            border-bottom: 1px solid var(--border-light);
        }
        .article-header .breadcrumb {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .article-header .breadcrumb a {
            color: var(--text-secondary);
        }
        .article-header .breadcrumb a:hover {
            color: var(--primary);
        }
        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 0.75rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }
        .article-meta .tag {
            padding: 0.2rem 0.8rem;
            border-radius: 999px;
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
            font-weight: 500;
            font-size: 0.8rem;
        }
        .article-body {
            padding: 2.5rem 0 3rem;
            max-width: 780px;
        }
        .article-body p {
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 1.25rem;
            color: var(--text-primary);
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .article-body ul, .article-body ol {
            margin: 1rem 0;
            padding-left: 1.5rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .article-body li {
            margin-bottom: 0.35rem;
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 0.75rem 1.25rem;
            background: rgba(245,158,11,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 1rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-light);
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        .article-nav a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            background: var(--bg-body);
            border: 1px solid var(--border-light);
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-nav a:hover {
            border-color: var(--border-medium);
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 1.6rem;
            }
            .article-body p {
                font-size: 0.98rem;
            }
        }
        /* search page placeholder */
        .empty-state {
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }
        .empty-state p {
            font-size: 1rem;
        }
        /* category cards extra */
        .cat-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .cat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .cat-card-img {
            height: 180px;
            background: linear-gradient(135deg, #e2e8f0, #f1f5f9);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: var(--text-muted);
        }
        .cat-card-body {
            padding: 1.25rem 1.5rem 1.5rem;
        }
        .cat-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.35rem;
        }
        .cat-card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 0.75rem;
        }
        .cat-card-body .btn-outline {
            font-size: 0.85rem;
            padding: 0.4rem 1rem;
        }
        @media (max-width: 868px) {
            .cat-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .cat-card-grid {
                grid-template-columns: 1fr;
            }
        }

/* roulang page: article */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-body: #0f172a;
            --bg-card: #1e293b;
            --bg-card-hover: #273548;
            --bg-elevated: #334155;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #334155;
            --border-light: #475569;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 14px rgba(0,0,0,0.35);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.45);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(15,23,42,0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }
        .site-header.scrolled { background: rgba(15,23,42,0.98); box-shadow: var(--shadow-lg); }
        .nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .logo {
            display: flex; align-items: center; gap: 0.5rem;
            font-size: 1.35rem; font-weight: 700; color: var(--text-primary) !important;
            letter-spacing: -0.02em; white-space: nowrap;
        }
        .logo:hover { color: var(--accent-light) !important; }
        .logo-icon {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff; font-size: 1.2rem; box-shadow: 0 2px 12px rgba(30,64,175,0.4);
            transition: transform var(--transition);
        }
        .logo:hover .logo-icon { transform: scale(1.05) rotate(-5deg); }
        .nav-links { display: flex; align-items: center; gap: 0.25rem; list-style: none; margin: 0; padding: 0; }
        .nav-links li a {
            display: block; padding: 0.6rem 1.1rem; border-radius: var(--radius-md);
            font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
            transition: all var(--transition); position: relative;
        }
        .nav-links li a:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }
        .nav-links li a.active { color: #fff; background: var(--primary); box-shadow: 0 2px 12px rgba(30,64,175,0.35); }
        .nav-right { display: flex; align-items: center; gap: 0.75rem; }
        .nav-search {
            display: flex; align-items: center;
            background: var(--bg-card); border: 1px solid var(--border-color);
            border-radius: var(--radius-lg); padding: 0.3rem 0.3rem 0.3rem 1rem;
            transition: all var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(59,130,246,0.2); }
        .nav-search input {
            background: transparent; border: none; outline: none;
            color: var(--text-primary); font-size: 0.85rem; width: 140px;
            padding: 0.35rem 0; transition: width var(--transition);
        }
        .nav-search input::placeholder { color: var(--text-muted); font-size: 0.8rem; }
        .nav-search input:focus { width: 180px; }
        .nav-search button {
            background: var(--primary); border: none; color: #fff;
            width: 34px; height: 34px; border-radius: var(--radius-md);
            cursor: pointer; transition: all var(--transition);
            display: flex; align-items: center; justify-content: center;
        }
        .nav-search button:hover { background: var(--primary-light); }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.55rem 1.4rem; border-radius: var(--radius-lg);
            font-size: 0.9rem; font-weight: 600; border: none;
            cursor: pointer; transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #1e293b !important; box-shadow: 0 2px 16px rgba(245,158,11,0.3);
        }
        .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(245,158,11,0.45); color: #0f172a !important; }
        .btn-primary-outline {
            background: transparent; border: 1.5px solid var(--border-light);
            color: var(--text-primary); padding: 0.5rem 1.3rem; border-radius: var(--radius-lg);
            font-size: 0.85rem; font-weight: 500; cursor: pointer;
            transition: all var(--transition);
        }
        .btn-primary-outline:hover { border-color: var(--primary-light); color: var(--primary-light); background: rgba(59,130,246,0.08); }
        .nav-toggle { display: none; background: none; border: none; color: var(--text-primary); font-size: 1.4rem; cursor: pointer; padding: 0.4rem; border-radius: var(--radius-md); }
        .nav-toggle:hover { background: rgba(255,255,255,0.06); }

        .article-hero {
            background: linear-gradient(135deg, rgba(30,64,175,0.15) 0%, rgba(15,23,42,0.95) 60%),
                        radial-gradient(ellipse at 20% 30%, rgba(59,130,246,0.1) 0%, transparent 60%);
            padding: 3rem 0 2.5rem; border-bottom: 1px solid var(--border-color);
            position: relative; overflow: hidden;
        }
        .article-hero::after {
            content: ''; position: absolute; bottom: 0; left: 0; right: 0;
            height: 1px; background: linear-gradient(90deg, transparent, var(--primary-light), transparent);
            opacity: 0.3;
        }
        .article-meta { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; margin-bottom: 1.25rem; }
        .article-category {
            display: inline-flex; align-items: center; gap: 0.35rem;
            padding: 0.25rem 0.85rem; border-radius: 999px;
            background: rgba(59,130,246,0.15); color: var(--primary-light);
            font-size: 0.8rem; font-weight: 500; border: 1px solid rgba(59,130,246,0.2);
        }
        .article-date { color: var(--text-muted); font-size: 0.85rem; display: flex; align-items: center; gap: 0.4rem; }
        .article-title {
            font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 800;
            line-height: 1.25; letter-spacing: -0.02em;
            background: linear-gradient(135deg, #f1f5f9 0%, #94a3b8 100%);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text; margin-bottom: 1rem;
        }
        .article-description {
            font-size: 1.1rem; color: var(--text-secondary);
            max-width: 720px; line-height: 1.7;
        }

        .article-body {
            padding: 3rem 0 4rem; flex: 1;
        }
        .article-content {
            max-width: 780px; margin: 0 auto;
            background: var(--bg-card); border-radius: var(--radius-xl);
            padding: 2.5rem 2.8rem; border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .article-content h2 {
            font-size: 1.65rem; font-weight: 700; margin: 2rem 0 1rem;
            color: var(--text-primary); line-height: 1.3;
        }
        .article-content h3 {
            font-size: 1.25rem; font-weight: 600; margin: 1.5rem 0 0.75rem;
            color: var(--text-primary); line-height: 1.4;
        }
        .article-content p {
            font-size: 1.05rem; line-height: 1.85; color: var(--text-secondary);
            margin-bottom: 1.25rem;
        }
        .article-content ul, .article-content ol {
            margin: 1rem 0 1.5rem 1.5rem; color: var(--text-secondary);
        }
        .article-content li { margin-bottom: 0.5rem; font-size: 1rem; line-height: 1.7; }
        .article-content a { color: var(--accent-light); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--accent); }
        .article-content blockquote {
            border-left: 4px solid var(--primary-light); padding: 1rem 1.5rem;
            margin: 1.5rem 0; background: rgba(59,130,246,0.06);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--text-secondary); font-style: italic;
        }
        .article-content code {
            background: var(--bg-elevated); padding: 0.2rem 0.5rem;
            border-radius: var(--radius-sm); font-size: 0.9rem; color: var(--accent-light);
        }
        .article-content pre {
            background: var(--bg-elevated); padding: 1.25rem 1.5rem;
            border-radius: var(--radius-lg); overflow-x: auto;
            border: 1px solid var(--border-color); margin: 1.5rem 0;
        }
        .article-content pre code { background: none; padding: 0; color: inherit; }
        .article-content img { margin: 1.5rem auto; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
        .article-content table {
            width: 100%; border-collapse: collapse; margin: 1.5rem 0;
            border-radius: var(--radius-md); overflow: hidden;
        }
        .article-content th, .article-content td {
            padding: 0.75rem 1rem; border: 1px solid var(--border-color);
            text-align: left; font-size: 0.95rem;
        }
        .article-content th { background: var(--bg-elevated); font-weight: 600; color: var(--text-primary); }
        .article-content td { color: var(--text-secondary); }
        .article-content hr { border: none; height: 1px; background: var(--border-color); margin: 2rem 0; }

        .article-notfound {
            text-align: center; padding: 4rem 2rem;
            background: var(--bg-card); border-radius: var(--radius-xl);
            border: 1px solid var(--border-color); max-width: 600px; margin: 2rem auto;
        }
        .article-notfound .icon { font-size: 3.5rem; color: var(--text-muted); margin-bottom: 1rem; }
        .article-notfound h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 0.75rem; }
        .article-notfound p { color: var(--text-secondary); margin-bottom: 1.5rem; }

        .section-related {
            padding: 3rem 0 4rem; border-top: 1px solid var(--border-color);
            background: rgba(15,23,42,0.5);
        }
        .section-related .section-title {
            font-size: 1.6rem; font-weight: 700; margin-bottom: 2rem;
            text-align: center;
        }
        .related-grid {
            display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .related-card {
            background: var(--bg-card); border: 1px solid var(--border-color);
            border-radius: var(--radius-lg); padding: 1.5rem;
            transition: all var(--transition); cursor: pointer;
        }
        .related-card:hover { transform: translateY(-4px); border-color: var(--border-light); box-shadow: var(--shadow-md); }
        .related-card .cat-tag {
            display: inline-block; padding: 0.15rem 0.6rem; border-radius: 999px;
            font-size: 0.75rem; font-weight: 500;
            background: rgba(59,130,246,0.12); color: var(--primary-light);
            margin-bottom: 0.6rem;
        }
        .related-card h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; line-height: 1.4; }
        .related-card h4 a { color: var(--text-primary); }
        .related-card h4 a:hover { color: var(--accent-light); }
        .related-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: 0.75rem; }
        .related-card .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 1rem; }

        .site-footer {
            background: rgba(15,23,42,0.95); border-top: 1px solid var(--border-color);
            padding: 4rem 0 0; margin-top: auto;
        }
        .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 2.5rem; margin-bottom: 2.5rem; }
        .footer-brand .logo { font-size: 1.2rem; margin-bottom: 1rem; }
        .footer-brand p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h5 { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); margin-bottom: 1.2rem; letter-spacing: 0.02em; }
        .footer-col ul { list-style: none; padding: 0; margin: 0; }
        .footer-col ul li { margin-bottom: 0.6rem; }
        .footer-col ul li a { color: var(--text-secondary); font-size: 0.9rem; transition: all var(--transition); display: flex; align-items: center; gap: 0.4rem; }
        .footer-col ul li a:hover { color: var(--accent-light); padding-left: 4px; }
        .footer-col ul li a i { width: 1.1rem; text-align: center; font-size: 0.85rem; }
        .footer-bottom {
            display: flex; align-items: center; justify-content: space-between;
            padding: 1.5rem 0; border-top: 1px solid var(--border-color);
            color: var(--text-muted); font-size: 0.85rem; flex-wrap: wrap; gap: 1rem;
        }
        .footer-social { display: flex; gap: 0.75rem; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 38px; height: 38px; border-radius: var(--radius-md);
            background: var(--bg-card); color: var(--text-secondary);
            font-size: 1rem; transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: rgba(15,23,42,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 1rem; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-lg); }
            .nav-links.open { display: flex; }
            .nav-links li a { padding: 0.75rem 1rem; font-size: 1rem; width: 100%; }
            .nav-search input { width: 100px; }
            .nav-search input:focus { width: 130px; }
            .nav-toggle { display: block; }
            .nav-right .btn-primary span { display: none; }
            .article-content { padding: 1.5rem 1.2rem; }
            .article-title { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .related-grid { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 1rem; }
            .nav-inner { height: 64px; }
            .logo { font-size: 1.1rem; }
            .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
            .nav-search { display: none; }
            .nav-right .btn-primary { padding: 0.45rem 0.9rem; font-size: 0.8rem; }
            .article-hero { padding: 2rem 0 1.5rem; }
            .article-title { font-size: 1.35rem; }
            .article-description { font-size: 0.95rem; }
            .article-content { padding: 1.2rem 0.8rem; border-radius: var(--radius-lg); }
            .article-content h2 { font-size: 1.3rem; }
            .article-content p { font-size: 0.95rem; }
            .section-related .section-title { font-size: 1.25rem; }
        }
        .fade-in { animation: fadeIn 0.6s ease-out both; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .tag-pill {
            display: inline-flex; align-items: center; gap: 0.3rem;
            padding: 0.2rem 0.75rem; border-radius: 999px;
            font-size: 0.75rem; font-weight: 500;
            background: rgba(245,158,11,0.12); color: var(--accent-light);
            border: 1px solid rgba(245,158,11,0.15);
        }
        .breadcrumb {
            display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem;
            font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.25rem;
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--accent-light); }
        .breadcrumb span { color: var(--text-muted); }
        .breadcrumb .sep { color: var(--border-light); }

/* roulang page: category1 */
:root {
            --brand-500: #0c8ee7;
            --brand-600: #0070c4;
            --accent-500: #f97316;
            --accent-600: #ea580c;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --text-muted: #94a3b8;
            --bg-body: #ffffff;
            --bg-section-alt: #f8fafc;
            --bg-section-dark: #0f172a;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.25rem;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--brand-600);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            outline: none;
            transition: var(--transition);
        }

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

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border-bottom-color: rgba(226, 232, 240, 0.95);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            border-radius: 10px;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 2px 8px rgba(12, 142, 231, 0.25);
        }
        .logo:hover {
            color: var(--text-primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-shrink: 0;
        }
        .nav-links li a {
            display: block;
            padding: 8px 18px;
            border-radius: 8px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-links li a:hover {
            color: var(--brand-600);
            background: rgba(12, 142, 231, 0.06);
        }
        .nav-links li a.active {
            color: var(--brand-600);
            background: rgba(12, 142, 231, 0.10);
            font-weight: 600;
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--brand-500);
            border-radius: 4px;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border-radius: 24px;
            padding: 0 4px 0 16px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            background: #fff;
            border-color: var(--brand-300);
            box-shadow: 0 0 0 3px rgba(12, 142, 231, 0.12);
        }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 8px 8px 8px 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 160px;
            transition: width 0.3s;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search input:focus {
            width: 200px;
        }
        .nav-search button {
            padding: 8px 14px;
            color: var(--text-secondary);
            border-radius: 20px;
            transition: var(--transition);
        }
        .nav-search button:hover {
            color: var(--brand-500);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 24px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent-500), var(--accent-600));
            color: #fff;
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.30);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
            color: #fff;
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.25);
        }
        .btn-outline {
            background: transparent;
            color: var(--brand-600);
            border: 2px solid var(--brand-200);
        }
        .btn-outline:hover {
            border-color: var(--brand-500);
            background: rgba(12, 142, 231, 0.04);
            transform: translateY(-1px);
        }
        .btn-white {
            background: #fff;
            color: var(--brand-600);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
            color: var(--brand-600);
        }

        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text-primary);
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: #f1f5f9;
        }

        @media (max-width: 1024px) {
            .nav-search input {
                width: 120px;
            }
            .nav-search input:focus {
                width: 150px;
            }
            .nav-links li a {
                padding: 8px 12px;
                font-size: 0.88rem;
            }
            .btn-primary span {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
                transform: translateY(-110%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                border-radius: 0 0 16px 16px;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 1rem;
                border-radius: 10px;
            }
            .nav-links li a.active::after {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-search input {
                width: 100px;
            }
            .nav-search input:focus {
                width: 130px;
            }
            .btn-primary span {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .nav-inner {
                height: 64px;
                gap: 8px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .nav-search input {
                width: 70px;
                font-size: 0.82rem;
                padding: 6px 4px 6px 0;
            }
            .nav-search input:focus {
                width: 100px;
            }
            .nav-search button {
                padding: 6px 10px;
            }
            .btn-primary {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .nav-links {
                top: 64px;
                padding: 12px 16px 20px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1.25rem;
        }
        .footer-brand .logo .logo-icon {
            background: linear-gradient(135deg, #38bdf8, #0c8ee7);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #94a3b8;
            max-width: 340px;
        }
        .footer-col h5 {
            color: #f1f5f9;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: #94a3b8;
            font-size: 0.88rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: #fff;
            transform: translateX(3px);
        }
        .footer-col ul li a i {
            font-size: 0.9rem;
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 32px;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: #64748b;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            color: #94a3b8;
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-col {
                text-align: center;
            }
            .footer-col ul {
                align-items: center;
            }
        }

        /* ===== Page Specific Styles ===== */
        .hero-guide {
            background: linear-gradient(135deg, #f0f7ff 0%, #e0effe 50%, #f8fafc 100%);
            padding: 80px 0 64px;
            position: relative;
            overflow: hidden;
        }
        .hero-guide::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(12, 142, 231, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-guide::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(249, 115, 22, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .section-alt {
            background: #f8fafc;
        }
        .section-dark {
            background: #0f172a;
            color: #e2e8f0;
        }

        .guide-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--brand-100);
        }
        .guide-card .card-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            font-size: 1.3rem;
            margin-bottom: 16px;
            color: #fff;
        }

        .step-line {
            position: relative;
            padding-left: 40px;
        }
        .step-line::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--brand-300), var(--brand-500));
            border-radius: 4px;
        }
        .step-item {
            position: relative;
            margin-bottom: 32px;
        }
        .step-item:last-child {
            margin-bottom: 0;
        }
        .step-item .step-num {
            position: absolute;
            left: -32px;
            top: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(12, 142, 231, 0.25);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 20px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            padding: 4px 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--brand-600);
        }
        .faq-question i {
            transition: transform 0.3s;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px 0 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 12px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
            background: rgba(12, 142, 231, 0.08);
            color: var(--brand-600);
        }
        .badge-orange {
            background: rgba(249, 115, 22, 0.10);
            color: var(--accent-600);
        }
        .badge-green {
            background: rgba(16, 185, 129, 0.10);
            color: #059669;
        }
        .badge-purple {
            background: rgba(139, 92, 246, 0.10);
            color: #7c3aed;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            background: #f1f5f9;
            color: var(--text-secondary);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .tag-item:hover {
            background: #fff;
            border-color: var(--brand-200);
            color: var(--brand-600);
            transform: translateY(-1px);
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--brand-500);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .cta-section {
            background: linear-gradient(135deg, #0c8ee7 0%, #0070c4 50%, #015a9e 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: 20px 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--brand-600);
        }
        .breadcrumb span {
            color: var(--text-primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

        @media (max-width: 768px) {
            .hero-guide {
                padding: 48px 0 40px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .guide-card {
                padding: 20px 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-guide {
                padding: 36px 0 32px;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .faq-question {
                font-size: 0.95rem;
            }
        }

        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }