/* roulang page: index */
:root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #1e40af;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            outline: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(26, 86, 219, 0.45);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            color: #1e293b;
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: #fef3c7;
            color: #b45309;
        }
        .badge-green {
            background: #ecfdf5;
            color: #047857;
        }
        .section {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--primary-light);
        }
        .card-lg {
            padding: 36px 32px;
        }
        @media (max-width: 768px) {
            .card {
                padding: 20px 16px;
            }
            .card-lg {
                padding: 24px 18px;
            }
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #1a56db 100%);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero-bg-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
            top: -200px;
            right: -100px;
            pointer-events: none;
        }
        .hero-bg-glow-2 {
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2), transparent 70%);
            bottom: -100px;
            left: -100px;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
            max-width: 580px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 70vh;
                padding: 80px 0 60px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(20px) saturate(1.5);
            -webkit-backdrop-filter: blur(20px) saturate(1.5);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .nav-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
        }
        .nav-logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .nav-logo:hover {
            color: var(--accent-light);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }
        .nav-links a {
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            font-size: 0.92rem;
            padding: 4px 0;
            position: relative;
            transition: var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-links a:hover {
            color: #fff;
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: #fff;
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            padding: 6px 16px 6px 20px;
            gap: 8px;
            transition: var(--transition);
            min-width: 200px;
        }
        .nav-search:focus-within {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: #fff;
            font-size: 0.88rem;
            width: 100%;
            padding: 4px 0;
        }
        .nav-search input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .nav-search i {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 4px;
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.98);
                flex-direction: column;
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                font-size: 1rem;
                padding: 8px 0;
            }
            .nav-search {
                min-width: 140px;
                padding: 4px 12px 4px 16px;
            }
            .nav-search input {
                font-size: 0.82rem;
            }
            .nav-right .btn {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media (max-width: 520px) {
            .nav-search {
                min-width: 100px;
            }
            .nav-logo {
                font-size: 1.1rem;
            }
            .nav-logo i {
                font-size: 1.2rem;
            }
        }
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.84rem;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 20px 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            user-select: none;
            gap: 16px;
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .faq-answer.open {
            max-height: 400px;
            padding-top: 14px;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .stat-number {
                font-size: 2rem;
            }
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 16px;
            background: var(--primary);
        }
        .feature-icon.accent {
            background: var(--accent);
            color: #1e293b;
        }
        .feature-icon.green {
            background: #059669;
        }
        .step-line {
            position: relative;
        }
        .step-line::before {
            content: '';
            position: absolute;
            left: 24px;
            top: 56px;
            bottom: 56px;
            width: 2px;
            background: var(--border);
        }
        .step-item {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            padding: 20px 0;
            position: relative;
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .step-line::before {
                left: 20px;
            }
            .step-num {
                width: 40px;
                height: 40px;
                font-size: 0.95rem;
            }
            .step-item {
                gap: 16px;
            }
        }
        .hero-card-panel {
            position: relative;
            z-index: 2;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 32px 28px;
            max-width: 400px;
            width: 100%;
        }
        .hero-card-panel h3 {
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .hero-card-panel .input-group {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .hero-card-panel input {
            padding: 12px 16px;
            border-radius: var(--radius-xs);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 0.9rem;
            outline: none;
            transition: var(--transition);
        }
        .hero-card-panel input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .hero-card-panel input:focus {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.1);
        }
        .hero-card-panel .btn {
            width: 100%;
            justify-content: center;
            margin-top: 4px;
        }
        .hero-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        @media (max-width: 768px) {
            .hero-split {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-card-panel {
                max-width: 100%;
            }
        }
        .method-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }
        .method-tab {
            padding: 8px 20px;
            border-radius: 50px;
            border: 1px solid var(--border);
            background: var(--bg-card);
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            color: var(--text-secondary);
        }
        .method-tab:hover {
            border-color: var(--primary-light);
            color: var(--primary);
        }
        .method-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .news-card {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }
        .news-card:last-child {
            border-bottom: none;
        }
        .news-card img {
            width: 120px;
            height: 80px;
            border-radius: var(--radius-xs);
            object-fit: cover;
            flex-shrink: 0;
        }
        .news-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .news-card .meta {
            display: flex;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 8px;
        }
        @media (max-width: 520px) {
            .news-card {
                flex-direction: column;
            }
            .news-card img {
                width: 100%;
                height: 160px;
            }
        }
        .cover-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 768px) {
            .cover-grid {
                grid-template-columns: 1fr;
            }
        }
        .cover-card {
            border-radius: var(--radius);
            overflow: hidden;
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .cover-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .cover-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .cover-card:hover img {
            transform: scale(1.03);
        }
        .cover-card-body {
            padding: 18px 20px 22px;
        }
        .cover-card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .cover-card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .cover-card .badge {
            position: absolute;
            top: 14px;
            left: 14px;
        }
        .cta-section {
            background: linear-gradient(135deg, #1a56db 0%, #0f172a 100%);
            border-radius: var(--radius);
            padding: 56px 48px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            position: relative;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.85;
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
        }
        .cta-section .btn {
            position: relative;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 36px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.92rem;
            }
        }
        .content-list-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 16px 0;
            border-bottom: 1px solid var(--border);
        }
        .content-list-item:last-child {
            border-bottom: none;
        }
        .content-list-item .num {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--primary);
            min-width: 32px;
            line-height: 1.4;
        }
        .content-list-item h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .content-list-item p {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .content-list-item .tag {
            font-size: 0.72rem;
            padding: 2px 10px;
            border-radius: 50px;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            display: inline-block;
            margin-top: 4px;
        }
        .banner-inner {
            position: relative;
            background: linear-gradient(135deg, #0f172a, #1e3a5f);
            padding: 80px 0 56px;
            overflow: hidden;
        }
        .banner-inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .banner-inner h1 {
            color: #fff;
            font-size: 2.4rem;
            font-weight: 800;
            position: relative;
            letter-spacing: -0.5px;
        }
        .banner-inner p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
            max-width: 560px;
            position: relative;
            margin-top: 10px;
        }
        @media (max-width: 768px) {
            .banner-inner {
                padding: 64px 0 40px;
            }
            .banner-inner h1 {
                font-size: 1.6rem;
            }
        }
        .article-content {
            max-width: 780px;
            margin: 0 auto;
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 36px;
            margin-bottom: 12px;
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-top: 28px;
            margin-bottom: 8px;
        }
        .article-content p {
            margin-bottom: 16px;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 16px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 6px;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 28px;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1b4a;
            --accent: #f5a623;
            --accent-light: #ffc55a;
            --accent-dark: #d4891a;
            --bg: #f8f9fc;
            --bg-alt: #ffffff;
            --bg-dark: #0f1b3a;
            --text: #1a1a2e;
            --text-light: #5a5a7a;
            --text-lighter: #8a8aaa;
            --border: #e2e6ef;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(26, 42, 108, 0.08);
            --shadow-hover: 0 16px 48px rgba(26, 42, 108, 0.14);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        input, button, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--text-light); }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / Nav ===== */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 20px rgba(0,0,0,0.04);
        }
        .nav-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-logo i { color: var(--accent); font-size: 1.5rem; }
        .nav-logo:hover { color: var(--primary); opacity: 0.9; }

        nav { display: flex; align-items: center; }
        .nav-links {
            display: flex;
            gap: 6px;
            align-items: center;
        }
        .nav-links li a {
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links li a:hover {
            color: var(--primary);
            background: rgba(26,42,108,0.06);
        }
        .nav-links li a.active {
            color: var(--primary);
            background: rgba(26,42,108,0.08);
            font-weight: 600;
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 6px 16px;
            gap: 8px;
            transition: all var(--transition);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(245,166,35,0.15);
        }
        .nav-search i { color: var(--text-lighter); font-size: 0.9rem; }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 6px 0;
            width: 100%;
            color: var(--text);
            font-size: 0.9rem;
        }
        .nav-search input::placeholder { color: var(--text-lighter); }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            line-height: 1.2;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26,42,108,0.25);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26,42,108,0.32);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-accent {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(245,166,35,0.3);
        }
        .btn-accent:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245,166,35,0.4);
            color: var(--primary-dark);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .nav-toggle { display: none; background: none; font-size: 1.5rem; color: var(--text); cursor: pointer; padding: 4px; }

        /* ===== Mobile Nav ===== */
        @media (max-width: 1024px) {
            .nav-search { min-width: 120px; }
            .nav-search input { width: 80px; }
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 40px rgba(0,0,0,0.08);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
                pointer-events: none;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 1.05rem;
                width: 100%;
                border-radius: var(--radius-xs);
            }
            .nav-links li a.active::after { display: none; }
            .nav-links li a.active { background: rgba(26,42,108,0.08); }
            .nav-toggle { display: block; }
            .nav-search { min-width: 100px; }
            .nav-search input { width: 60px; }
            .nav-right .btn { display: none; }
        }
        @media (max-width: 520px) {
            .nav-logo { font-size: 1.05rem; }
            .nav-logo i { font-size: 1.2rem; }
            .nav-search { min-width: 70px; padding: 4px 12px; }
            .nav-search input { width: 40px; }
        }

        /* ===== Hero Banner (inner) ===== */
        .page-hero {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -40px;
            right: -40px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(245,166,35,0.08);
            filter: blur(60px);
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-hero h1 {
            color: #fff;
            font-size: 2.6rem;
            margin-bottom: 12px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .page-hero .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
        }
        .page-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
        .page-hero .breadcrumb a:hover { color: var(--accent); }
        .page-hero .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.4); }
        @media (max-width: 768px) {
            .page-hero { padding: 100px 0 40px; min-height: 200px; }
            .page-hero h1 { font-size: 1.8rem; }
        }

        /* ===== Article Main ===== */
        .article-section {
            padding: 60px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-main {
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-cover {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius) var(--radius) 0 0;
        }
        .article-body {
            padding: 40px 44px 48px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 24px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }
        .article-meta .badge {
            background: rgba(245,166,35,0.12);
            color: var(--accent-dark);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-meta span {
            font-size: 0.85rem;
            color: var(--text-lighter);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta span i { font-size: 0.75rem; }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.2rem;
            color: var(--text);
        }
        .article-content h2, .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 0.8rem;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.2rem;
            padding-left: 1.6rem;
        }
        .article-content li {
            margin-bottom: 0.4rem;
            color: var(--text-light);
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.5rem 0;
            box-shadow: var(--shadow);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 20px;
            margin: 1.5rem 0;
            background: rgba(245,166,35,0.06);
            border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags a {
            padding: 6px 16px;
            border-radius: 40px;
            background: var(--bg);
            color: var(--text-light);
            font-size: 0.8rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-tags a:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--accent); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list li a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .sidebar-list li a:hover { color: var(--primary); }
        .sidebar-list li a img {
            width: 64px;
            height: 48px;
            border-radius: var(--radius-xs);
            object-fit: cover;
            flex-shrink: 0;
        }
        .sidebar-list li a .side-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .sidebar-list li a .side-date {
            font-size: 0.75rem;
            color: var(--text-lighter);
            margin-top: 4px;
        }
        .sidebar-cta {
            text-align: center;
        }
        .sidebar-cta p {
            font-size: 0.9rem;
            margin-bottom: 16px;
        }
        .sidebar-cta .btn { width: 100%; }

        /* ===== Related Articles ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .related-section h2 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 1.8rem;
        }
        .related-section h2 i { color: var(--accent); margin-right: 8px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a { color: var(--text); }
        .related-card .card-body h4 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-lighter);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .meta {
            font-size: 0.75rem;
            color: var(--text-lighter);
            display: flex;
            gap: 12px;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 40px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-lighter);
            margin-bottom: 24px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-lighter);
            margin-bottom: 24px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.3);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.4);
            margin: 0 4px;
        }
        .footer-bottom a:hover { color: var(--accent); }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .article-body { padding: 24px 20px 32px; }
            .article-content { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .page-hero h1 { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .article-meta { flex-direction: column; gap: 8px; align-items: flex-start; }
            .sidebar-card { padding: 20px; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 16px; }
        .mt-2 { margin-top: 32px; }
        .mb-1 { margin-bottom: 16px; }
        .mb-2 { margin-bottom: 32px; }
        .gap-1 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
        --primary: #0f1a2e;
        --primary-light: #1c2d46;
        --primary-muted: #2a3f5a;
        --accent: #f0b90b;
        --accent-dark: #d4a30a;
        --accent-glow: rgba(240, 185, 11, 0.25);
        --bg: #f4f6fa;
        --bg-card: #ffffff;
        --bg-dark: #0b1422;
        --text: #0f1a2e;
        --text-light: #5e6f82;
        --text-white: #f0f2f5;
        --border: #e2e7ee;
        --radius: 14px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
        --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
        --shadow-accent: 0 4px 20px rgba(240, 185, 11, 0.30);
        --transition: 0.25s ease;
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --container-w: 1200px;
        --nav-h: 68px;
    }

    /* ===== 基础 Reset ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
    }
    body {
        font-family: var(--font-sans);
        background: var(--bg);
        color: var(--text);
        line-height: 1.6;
        font-size: 16px;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-sm);
    }
    button,
    input,
    textarea {
        font-family: inherit;
        font-size: inherit;
        outline: none;
        border: none;
        background: none;
    }
    ul {
        list-style: none;
    }

    /* ===== 容器 ===== */
    .container {
        max-width: var(--container-w);
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 768px) {
        .container {
            padding: 0 16px;
        }
    }

    /* ===== 导航 ===== */
    .nav-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--nav-h);
        background: rgba(255, 255, 255, 0.85);
        backdrop-filter: blur(14px) saturate(180%);
        -webkit-backdrop-filter: blur(14px) saturate(180%);
        border-bottom: 1px solid rgba(226, 231, 238, 0.6);
        box-shadow: 0 1px 12px rgba(0, 0, 0, 0.04);
        transition: background var(--transition);
    }
    .nav-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--primary);
        letter-spacing: -0.3px;
        white-space: nowrap;
    }
    .nav-logo i {
        color: var(--accent);
        font-size: 1.4rem;
    }
    .nav-logo:hover {
        color: var(--primary-light);
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav-links li a {
        padding: 6px 16px;
        border-radius: var(--radius-sm);
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--text-light);
        transition: background var(--transition), color var(--transition);
    }
    .nav-links li a:hover {
        background: rgba(15, 26, 46, 0.06);
        color: var(--text);
    }
    .nav-links li a.active {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 2px 10px rgba(15, 26, 46, 0.15);
    }
    .nav-links li a.active:hover {
        background: var(--primary-light);
    }
    .nav-right {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .nav-search {
        display: flex;
        align-items: center;
        background: var(--bg);
        border: 1px solid var(--border);
        border-radius: 40px;
        padding: 0 14px;
        height: 38px;
        transition: border-color var(--transition), box-shadow var(--transition);
        min-width: 180px;
    }
    .nav-search i {
        color: var(--text-light);
        font-size: 0.85rem;
        margin-right: 8px;
    }
    .nav-search input {
        background: transparent;
        border: none;
        outline: none;
        font-size: 0.85rem;
        color: var(--text);
        width: 100%;
    }
    .nav-search input::placeholder {
        color: var(--text-light);
        opacity: 0.7;
    }
    .nav-search:focus-within {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px var(--accent-glow);
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 10px 24px;
        border-radius: 40px;
        font-weight: 600;
        font-size: 0.9rem;
        transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        cursor: pointer;
        white-space: nowrap;
        border: none;
    }
    .btn-primary {
        background: var(--accent);
        color: var(--primary);
        box-shadow: 0 4px 14px var(--accent-glow);
    }
    .btn-primary:hover {
        background: var(--accent-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px var(--accent-glow);
    }
    .btn-primary:active {
        transform: scale(0.97);
    }
    .btn-outline {
        background: transparent;
        color: var(--text);
        border: 1.5px solid var(--border);
    }
    .btn-outline:hover {
        border-color: var(--accent);
        color: var(--primary);
        background: rgba(240, 185, 11, 0.05);
    }
    .btn-sm {
        padding: 6px 18px;
        font-size: 0.82rem;
    }
    .btn-lg {
        padding: 14px 36px;
        font-size: 1rem;
    }
    .nav-toggle {
        display: none;
        background: none;
        border: none;
        font-size: 1.4rem;
        color: var(--text);
        cursor: pointer;
        padding: 4px;
    }
    @media (max-width: 820px) {
        .nav-links {
            position: fixed;
            top: var(--nav-h);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            flex-direction: column;
            padding: 16px 24px;
            gap: 6px;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
            transform: translateY(-110%);
            opacity: 0;
            pointer-events: none;
            transition: transform 0.35s ease, opacity 0.3s ease;
        }
        .nav-links.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .nav-links li a {
            width: 100%;
            padding: 10px 16px;
            font-size: 1rem;
        }
        .nav-search {
            min-width: 100px;
            flex: 1;
            max-width: 180px;
        }
        .nav-toggle {
            display: block;
        }
        .nav-right .btn-primary.btn-sm {
            display: none;
        }
    }
    @media (max-width: 480px) {
        .nav-search {
            min-width: 60px;
            max-width: 120px;
        }
        .nav-search input {
            font-size: 0.78rem;
        }
        .nav-logo {
            font-size: 1.05rem;
        }
    }

    /* ===== 通用板块 ===== */
    .section {
        padding: 80px 0;
    }
    .section-alt {
        background: var(--bg-card);
    }
    .section-dark {
        background: var(--bg-dark);
        color: var(--text-white);
    }
    .section-title {
        font-size: 2.1rem;
        font-weight: 700;
        letter-spacing: -0.5px;
        line-height: 1.25;
        margin-bottom: 12px;
    }
    .section-sub {
        font-size: 1.05rem;
        color: var(--text-light);
        max-width: 640px;
        line-height: 1.6;
    }
    .section-dark .section-sub {
        color: rgba(255, 255, 255, 0.6);
    }
    .section-head {
        text-align: center;
        margin-bottom: 48px;
    }
    .section-head .section-sub {
        margin: 0 auto;
    }
    .tag {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 40px;
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        text-transform: uppercase;
        background: var(--accent-glow);
        color: var(--accent-dark);
        margin-bottom: 12px;
    }

    /* ===== Hero ===== */
    .hero {
        padding: 140px 0 80px;
        position: relative;
        background: var(--bg-dark);
        color: var(--text-white);
        overflow: hidden;
        min-height: 480px;
        display: flex;
        align-items: center;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.3;
        pointer-events: none;
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11, 20, 34, 0.92) 0%, rgba(15, 26, 46, 0.70) 60%, rgba(15, 26, 46, 0.40) 100%);
        pointer-events: none;
    }
    .hero .container {
        position: relative;
        z-index: 2;
    }
    .hero-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
    }
    .hero h1 {
        font-size: 2.8rem;
        font-weight: 800;
        letter-spacing: -1px;
        line-height: 1.15;
        margin-bottom: 16px;
    }
    .hero h1 span {
        color: var(--accent);
    }
    .hero p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.7);
        max-width: 520px;
        line-height: 1.7;
        margin-bottom: 28px;
    }
    .hero-actions {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 16px;
        border-radius: 40px;
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.10);
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 20px;
    }
    .hero-badge i {
        color: var(--accent);
    }
    .hero-image {
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .hero-image img {
        border-radius: var(--radius-lg);
        box-shadow: 0 20px 60px rgba(0, 0, 0, 0.40);
        max-height: 360px;
        width: 100%;
        object-fit: cover;
    }
    @media (max-width: 900px) {
        .hero-grid {
            grid-template-columns: 1fr;
            text-align: center;
        }
        .hero h1 {
            font-size: 2.2rem;
        }
        .hero p {
            margin: 0 auto 28px;
        }
        .hero-actions {
            justify-content: center;
        }
        .hero-badge {
            justify-content: center;
        }
        .hero-image {
            display: none;
        }
        .hero {
            padding: 120px 0 60px;
            min-height: 380px;
        }
    }
    @media (max-width: 480px) {
        .hero h1 {
            font-size: 1.7rem;
        }
        .hero p {
            font-size: 0.95rem;
        }
        .section-title {
            font-size: 1.6rem;
        }
    }

    /* ===== 卡片网格 ===== */
    .card-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 24px;
    }
    .card {
        background: var(--bg-card);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 28px 24px;
        transition: transform var(--transition), box-shadow var(--transition);
        border: 1px solid var(--border);
    }
    .card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-hover);
    }
    .card-icon {
        width: 52px;
        height: 52px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.4rem;
        margin-bottom: 16px;
        background: var(--accent-glow);
        color: var(--accent-dark);
    }
    .card h3 {
        font-size: 1.15rem;
        font-weight: 700;
        margin-bottom: 8px;
        letter-spacing: -0.2px;
    }
    .card p {
        font-size: 0.92rem;
        color: var(--text-light);
        line-height: 1.6;
    }
    .card-img {
        overflow: hidden;
        border-radius: var(--radius-sm);
        margin-bottom: 16px;
    }
    .card-img img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        transition: transform 0.4s ease;
        border-radius: var(--radius-sm);
    }
    .card:hover .card-img img {
        transform: scale(1.03);
    }

    /* ===== 安全入口介绍 ===== */
    .intro-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }
    .intro-content h2 {
        font-size: 1.9rem;
        font-weight: 700;
        letter-spacing: -0.4px;
        margin-bottom: 16px;
    }
    .intro-content p {
        color: var(--text-light);
        line-height: 1.7;
        margin-bottom: 16px;
        font-size: 1rem;
    }
    .intro-image img {
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-hover);
        width: 100%;
        max-height: 340px;
        object-fit: cover;
    }
    @media (max-width: 820px) {
        .intro-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .intro-content h2 {
            font-size: 1.6rem;
        }
    }

    /* ===== 登录方式 ===== */
    .method-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 20px;
    }
    .method-item {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 24px 20px;
        text-align: center;
        transition: transform var(--transition), box-shadow var(--transition);
    }
    .method-item:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-hover);
    }
    .method-item i {
        font-size: 2rem;
        color: var(--accent-dark);
        margin-bottom: 12px;
        display: block;
    }
    .method-item h4 {
        font-size: 1rem;
        font-weight: 700;
        margin-bottom: 4px;
    }
    .method-item p {
        font-size: 0.85rem;
        color: var(--text-light);
    }
    .method-item .tag-sm {
        display: inline-block;
        margin-top: 10px;
        padding: 2px 12px;
        border-radius: 20px;
        font-size: 0.7rem;
        font-weight: 600;
        background: rgba(15, 26, 46, 0.05);
        color: var(--text-light);
    }

    /* ===== 数据统计 ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 20px;
        text-align: center;
    }
    .stat-item {
        padding: 28px 16px;
        border-radius: var(--radius);
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(4px);
    }
    .stat-item .num {
        font-size: 2.6rem;
        font-weight: 800;
        color: var(--accent);
        letter-spacing: -1px;
        line-height: 1.1;
    }
    .stat-item .label {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.6);
        margin-top: 6px;
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 760px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        overflow: hidden;
        transition: box-shadow var(--transition);
    }
    .faq-item:hover {
        box-shadow: var(--shadow);
    }
    .faq-q {
        padding: 18px 22px;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
        background: var(--bg-card);
        transition: background var(--transition);
        user-select: none;
    }
    .faq-q i {
        color: var(--text-light);
        transition: transform var(--transition);
        font-size: 0.85rem;
        flex-shrink: 0;
    }
    .faq-q.open i {
        transform: rotate(180deg);
    }
    .faq-a {
        padding: 0 22px 18px;
        font-size: 0.92rem;
        color: var(--text-light);
        line-height: 1.7;
        display: none;
    }
    .faq-a.show {
        display: block;
    }

    /* ===== CTA ===== */
    .cta-box {
        background: var(--primary);
        border-radius: var(--radius-lg);
        padding: 56px 48px;
        text-align: center;
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .cta-box::after {
        content: '';
        position: absolute;
        top: -40%;
        right: -20%;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(240, 185, 11, 0.08) 0%, transparent 70%);
        pointer-events: none;
        border-radius: 50%;
    }
    .cta-box h2 {
        font-size: 2rem;
        font-weight: 700;
        letter-spacing: -0.5px;
        margin-bottom: 12px;
    }
    .cta-box p {
        font-size: 1.05rem;
        color: rgba(255, 255, 255, 0.7);
        max-width: 520px;
        margin: 0 auto 28px;
    }
    .cta-box .btn-primary {
        background: var(--accent);
        color: var(--primary);
        box-shadow: 0 4px 20px var(--accent-glow);
    }
    .cta-box .btn-primary:hover {
        background: var(--accent-dark);
        box-shadow: 0 8px 32px var(--accent-glow);
    }
    @media (max-width: 600px) {
        .cta-box {
            padding: 36px 24px;
        }
        .cta-box h2 {
            font-size: 1.5rem;
        }
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--bg-dark);
        color: rgba(255, 255, 255, 0.8);
        padding: 60px 0 32px;
        margin-top: 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 40px;
    }
    .footer-brand h3 {
        font-size: 1.2rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .footer-brand p {
        font-size: 0.88rem;
        color: rgba(255, 255, 255, 0.5);
        line-height: 1.7;
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 0.9rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-col ul li {
        margin-bottom: 8px;
    }
    .footer-col ul li a {
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.45);
        transition: color var(--transition);
    }
    .footer-col ul li a:hover {
        color: var(--accent);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.8rem;
        color: rgba(255, 255, 255, 0.3);
    }
    .footer-bottom a {
        color: rgba(255, 255, 255, 0.3);
        transition: color var(--transition);
    }
    .footer-bottom a:hover {
        color: var(--accent);
    }
    @media (max-width: 820px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .footer-brand {
            grid-column: 1 / -1;
        }
    }
    @media (max-width: 480px) {
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }

    /* ===== 辅助 ===== */
    .mt-24 {
        margin-top: 24px;
    }
    .mb-24 {
        margin-bottom: 24px;
    }
    .text-center {
        text-align: center;
    }
    .flex-center {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .gap-16 {
        gap: 16px;
    }
    .gap-12 {
        gap: 12px;
    }

    /* ===== 移动端微调 ===== */
    @media (max-width: 600px) {
        .section {
            padding: 56px 0;
        }
        .card-grid {
            grid-template-columns: 1fr;
        }
        .method-list {
            grid-template-columns: 1fr 1fr;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
        }
        .stat-item .num {
            font-size: 2rem;
        }
    }
    @media (max-width: 380px) {
        .method-list {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: 1fr;
        }
    }