/* roulang page: index */
:root {
            --color-primary: #1B3A5C;
            --color-primary-light: #2C5F8A;
            --color-accent: #C8963E;
            --color-accent-light: #D4A855;
            --color-accent-dark: #A67A2E;
            --color-bg: #F9F8F6;
            --color-surface: #FFFFFF;
            --color-dark: #0F2439;
            --color-text: #1A1A1A;
            --color-text-secondary: #4B5563;
            --color-text-muted: #9CA3AF;
            --color-border: #E5E7EB;
            --color-border-light: #F0EFEC;
            --color-success: #10B981;
            --color-success-bg: #ECFDF5;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(15, 36, 57, 0.06);
            --shadow: 0 2px 8px rgba(15, 36, 57, 0.07), 0 1px 3px rgba(15, 36, 57, 0.05);
            --shadow-md: 0 6px 20px rgba(15, 36, 57, 0.10), 0 2px 6px rgba(15, 36, 57, 0.06);
            --shadow-lg: 0 12px 32px rgba(15, 36, 57, 0.13), 0 4px 10px rgba(15, 36, 57, 0.07);
            --sidebar-width: 250px;
            --header-mobile-height: 60px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, -apple-system, sans-serif;
            --transition-fast: 0.18s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            outline: none;
            transition: all var(--transition-fast);
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }
        input {
            font-family: inherit;
            outline: none;
            border: 1px solid var(--color-border);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(200, 150, 62, 0.12);
        }
        ul,
        ol {
            list-style: none;
        }

        /* ========== Sidebar Navigation ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-dark);
            color: #ffffff;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform var(--transition-slow), box-shadow var(--transition-slow);
            box-shadow: 2px 0 24px rgba(15, 36, 57, 0.18);
        }
        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.10);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: #ffffff;
            white-space: nowrap;
        }
        .sidebar-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius);
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-logo a:hover {
            color: var(--color-accent-light);
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 11px;
            padding: 12px 16px;
            border-radius: var(--radius);
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.07);
            color: #ffffff;
        }
        .sidebar-nav a.active {
            background: var(--color-accent);
            color: #ffffff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(200, 150, 62, 0.35);
        }
        .sidebar-nav a .nav-icon {
            width: 20px;
            text-align: center;
            flex-shrink: 0;
            font-size: 0.9rem;
        }
        .sidebar-footer {
            padding: 16px 24px 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            flex-shrink: 0;
        }
        .sidebar-footer .sidebar-cta {
            display: block;
            text-align: center;
            padding: 11px 20px;
            border-radius: var(--radius);
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.30);
            color: #ffffff;
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
        }
        .sidebar-footer .sidebar-cta:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.55);
            color: #ffffff;
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-mobile-height);
            background: var(--color-dark);
            color: #fff;
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(15, 36, 57, 0.25);
        }
        .mobile-header .mobile-logo {
            font-weight: 700;
            font-size: 1.05rem;
            letter-spacing: 0.03em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .mobile-logo .logo-icon {
            width: 30px;
            height: 30px;
            border-radius: 6px;
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 800;
            color: #fff;
        }
        .hamburger-btn {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 8px;
            margin-left: auto;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.10);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 36, 57, 0.55);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-slow);
            pointer-events: none;
        }
        .sidebar-overlay.visible {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== Main Content ========== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== Hero Section ========== */
        .hero {
            position: relative;
            background: var(--color-dark);
            color: #ffffff;
            padding: 80px 0 90px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 36, 57, 0.45) 0%, rgba(15, 36, 57, 0.85) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            max-width: 900px;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(200, 150, 62, 0.2);
            border: 1px solid rgba(200, 150, 62, 0.4);
            color: var(--color-accent-light);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.88rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 22px;
        }
        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: 0.04em;
            line-height: 1.25;
            margin-bottom: 18px;
        }
        .hero h1 .highlight {
            color: var(--color-accent-light);
            position: relative;
        }
        .hero-subtitle {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.80);
            max-width: 600px;
            line-height: 1.65;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius);
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--color-accent);
            color: #ffffff;
            border: 2px solid var(--color-accent);
            box-shadow: 0 4px 16px rgba(200, 150, 62, 0.35);
        }
        .btn-primary:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            box-shadow: 0 6px 22px rgba(200, 150, 62, 0.45);
            transform: translateY(-1px);
            color: #ffffff;
        }
        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.45);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.75);
            color: #ffffff;
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.88rem;
            border-radius: var(--radius-sm);
        }
        .btn-ghost {
            background: transparent;
            color: var(--color-text-secondary);
            border: 1px solid transparent;
            padding: 8px 14px;
            font-weight: 500;
        }
        .btn-ghost:hover {
            background: var(--color-border-light);
            color: var(--color-text);
        }

        /* ========== Section Common ========== */
        .section {
            padding: 70px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: var(--color-text);
            margin-bottom: 10px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* ========== Card Grid ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }
        .card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--color-border-light);
        }
        .card-body {
            padding: 22px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(200, 150, 62, 0.10);
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            letter-spacing: 0.04em;
            align-self: flex-start;
        }
        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .card-desc {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.55;
            flex: 1;
            margin-bottom: 14px;
        }
        .card-meta {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .card-link {
            font-weight: 600;
            color: var(--color-primary-light);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
            margin-top: auto;
        }
        .card-link:hover {
            color: var(--color-accent);
        }
        .card-link::after {
            content: '→';
            transition: transform var(--transition-fast);
        }
        .card-link:hover::after {
            transform: translateX(3px);
        }

        /* ========== Feature / Highlight Cards ========== */
        .highlight-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .highlight-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .highlight-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .highlight-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            background: rgba(27, 58, 92, 0.07);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            color: var(--color-primary);
        }
        .highlight-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }
        .highlight-card p {
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

        /* ========== Stats Row ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }
        .stat-item {
            padding: 20px;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            font-weight: 500;
        }

        /* ========== Steps / Timeline ========== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border-light);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-accent);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            box-shadow: 0 4px 12px rgba(200, 150, 62, 0.3);
        }
        .step-card h4 {
            font-size: 0.98rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }
        .step-card p {
            font-size: 0.84rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 750px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            background: none;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 1.2rem;
            transition: transform var(--transition-fast);
            color: var(--color-text-muted);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--color-accent);
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background: var(--color-primary);
            color: #ffffff;
            text-align: center;
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h3 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 28px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-primary {
            background: var(--color-accent);
            border-color: var(--color-accent);
            font-size: 1.05rem;
            padding: 14px 36px;
        }
        .cta-section .btn-primary:hover {
            background: var(--color-accent-light);
            border-color: var(--color-accent-light);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--color-dark);
            color: rgba(255, 255, 255, 0.70);
            padding: 40px 0 28px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 28px;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }
        .footer-col p,
        .footer-col a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.60);
            line-height: 1.7;
            display: block;
        }
        .footer-col a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 0.03em;
        }
        .footer-bottom strong {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ========== Empty State ========== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            border: 2px dashed var(--color-border);
            color: var(--color-text-muted);
            font-size: 1rem;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: var(--header-mobile-height);
            }
            .container,
            .container-narrow {
                padding: 0 20px;
            }
            .hero {
                padding: 50px 0 60px;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .highlight-row,
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid {
                grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            }
            .section {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero {
                padding: 40px 0 50px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .highlight-row,
            .steps-list {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .step-card {
                padding: 20px 16px;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px 14px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .highlight-row,
            .steps-list {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 1.6rem;
            }
            .container,
            .container-narrow {
                padding: 0 14px;
            }
            .section-header {
                margin-bottom: 30px;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .cta-section h3 {
                font-size: 1.4rem;
            }
            .btn {
                padding: 10px 18px;
                font-size: 0.85rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #1a5f4a;
            --primary-light: #2d8a6a;
            --primary-dark: #0f3d2e;
            --primary-subtle: #e8f5f0;
            --accent: #d4a742;
            --accent-light: #f0d68a;
            --accent-subtle: #fdf8ed;
            --bg: #f9fafb;
            --bg-white: #ffffff;
            --bg-warm: #faf8f5;
            --text: #1a1a1a;
            --text-secondary: #5a5a5a;
            --text-muted: #8a8a8a;
            --text-on-primary: #ffffff;
            --border: #e0e4e8;
            --border-light: #eef1f5;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.07), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
            --sidebar-width: 248px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-serif: 'Georgia', 'Noto Serif SC', 'STSong', 'SimSun', 'Times New Roman', serif;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 0.35s 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%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

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

        /* ========== SIDEBAR ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-white);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-slow), opacity var(--transition-slow);
        }

        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-dark);
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            display: inline-block;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 16px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: var(--radius);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .sidebar-nav a:hover {
            background: var(--primary-subtle);
            color: var(--primary);
        }

        .sidebar-nav a.active {
            background: var(--primary-subtle);
            color: var(--primary);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
            border-radius: var(--radius) var(--radius) var(--radius) 4px;
        }

        .sidebar-nav a .nav-icon {
            font-size: 1.1rem;
            flex-shrink: 0;
            width: 24px;
            text-align: center;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            flex-shrink: 0;
        }

        .sidebar-footer .sidebar-cta {
            display: block;
            text-align: center;
            padding: 10px 18px;
            border-radius: var(--radius);
            background: var(--primary);
            color: var(--text-on-primary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            letter-spacing: 0.01em;
        }

        .sidebar-footer .sidebar-cta:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow);
            transform: translateY(-1px);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ========== MOBILE MENU TOGGLE ========== */
        .mobile-menu-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            width: 42px;
            height: 42px;
            border-radius: var(--radius);
            background: var(--bg-white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition);
        }

        .mobile-menu-toggle:hover {
            box-shadow: var(--shadow);
        }

        .mobile-menu-toggle .hamburger {
            width: 20px;
            height: 14px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.45);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-slow);
            pointer-events: none;
        }

        .sidebar-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== ARTICLE BANNER ========== */
        .article-banner {
            background: linear-gradient(160deg, rgba(26,95,74,0.88) 0%, rgba(15,61,46,0.92) 100%),
                        url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 48px 40px 36px;
            color: var(--text-on-primary);
            position: relative;
            min-height: 180px;
            display: flex;
            align-items: flex-end;
        }

        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: rgba(255,255,255,0.8);
            flex-wrap: wrap;
        }

        .article-banner .breadcrumb a {
            color: rgba(255,255,255,0.9);
            transition: color var(--transition);
        }

        .article-banner .breadcrumb a:hover {
            color: #ffffff;
            text-decoration: underline;
        }

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

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

        .article-banner .category-badge {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 20px;
            background: rgba(255,255,255,0.18);
            color: #ffffff;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.25);
            margin-bottom: 10px;
        }

        /* ========== ARTICLE MAIN ========== */
        .article-main {
            max-width: 820px;
            margin: 0 auto;
            padding: 40px 32px 60px;
            width: 100%;
        }

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

        .article-header h1 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-light);
        }

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

        .article-meta .meta-dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--text-muted);
        }

        .article-featured-image {
            margin-bottom: 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .article-featured-image img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/9;
        }

        .article-body {
            font-size: 1.0625rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-body p {
            margin-bottom: 1.4em;
        }

        .article-body h2 {
            font-size: 1.45rem;
            margin-top: 2em;
            margin-bottom: 0.7em;
            color: var(--primary-dark);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-subtle);
        }

        .article-body h3 {
            font-size: 1.2rem;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
        }

        .article-body ul, .article-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.5em;
        }

        .article-body li {
            margin-bottom: 0.5em;
        }

        .article-body blockquote {
            border-left: 4px solid var(--primary-light);
            background: var(--primary-subtle);
            padding: 16px 20px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            color: var(--primary-dark);
            font-style: italic;
        }

        .article-body img {
            border-radius: var(--radius);
            margin: 1.5em auto;
            box-shadow: var(--shadow);
        }

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

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

        .article-body code {
            background: #f3f4f6;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }

        .article-body pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 20px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ========== ARTICLE TAGS ========== */
        .article-tags {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }

        .article-tags .tags-label {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-right: 4px;
        }

        .article-tags .tag {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 20px;
            background: var(--bg-warm);
            color: var(--text-secondary);
            font-size: 0.825rem;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .article-tags .tag:hover {
            background: var(--primary-subtle);
            color: var(--primary);
            border-color: var(--primary-light);
        }

        /* ========== RELATED POSTS ========== */
        .related-section {
            background: var(--bg-white);
            padding: 48px 32px 56px;
            border-top: 1px solid var(--border-light);
        }

        .related-section .section-label {
            text-align: center;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .related-section h3 {
            text-align: center;
            font-size: 1.5rem;
            margin-bottom: 32px;
            color: var(--text);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            max-width: 960px;
            margin: 0 auto;
        }

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .related-card .card-image {
            aspect-ratio: 16/10;
            overflow: hidden;
        }

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

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

        .related-card .card-body {
            padding: 16px 18px 20px;
        }

        .related-card .card-body h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.45;
        }

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

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

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

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: linear-gradient(150deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            padding: 52px 32px;
            text-align: center;
            color: var(--text-on-primary);
        }

        .cta-section h3 {
            font-size: 1.6rem;
            color: #ffffff;
            margin-bottom: 10px;
        }

        .cta-section p {
            color: rgba(255,255,255,0.85);
            margin-bottom: 24px;
            font-size: 1.05rem;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .btn-cta {
            display: inline-block;
            padding: 13px 32px;
            border-radius: 30px;
            background: var(--accent);
            color: #1a1a1a;
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: 0.02em;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(0,0,0,0.2);
        }

        .cta-section .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.3);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #1a1d20;
            color: #c0c5cc;
            padding: 48px 32px 24px;
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .site-footer .container {
            max-width: 960px;
            margin: 0 auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 0.95rem;
            margin-bottom: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .footer-col p {
            margin-bottom: 6px;
            font-size: 0.875rem;
            color: #a0a6b0;
        }

        .footer-col a {
            display: block;
            color: #a0a6b0;
            font-size: 0.875rem;
            margin-bottom: 6px;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 0.825rem;
            color: #7a8090;
        }

        .footer-bottom strong {
            color: #d0d4db;
        }

        /* ========== NOT FOUND STATE ========== */
        .not-found-state {
            text-align: center;
            padding: 80px 32px;
            max-width: 500px;
            margin: 0 auto;
        }

        .not-found-state .icon-404 {
            font-size: 4rem;
            margin-bottom: 16px;
            opacity: 0.7;
        }

        .not-found-state h2 {
            font-size: 1.6rem;
            margin-bottom: 10px;
            color: var(--text);
        }

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

        .not-found-state .btn-back {
            display: inline-block;
            padding: 12px 28px;
            border-radius: 30px;
            background: var(--primary);
            color: #ffffff;
            font-weight: 600;
            transition: all var(--transition);
        }

        .not-found-state .btn-back:hover {
            background: var(--primary-dark);
            box-shadow: var(--shadow);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
                padding: 0 8px;
            }
            .article-main {
                padding: 32px 24px 48px;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: var(--shadow-xl);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
            }
            .mobile-menu-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .article-banner {
                padding: 40px 20px 28px;
                min-height: 140px;
                padding-top: 64px;
            }
            .article-main {
                padding: 24px 18px 40px;
            }
            .article-header h1 {
                font-size: 1.45rem;
            }
            .article-body {
                font-size: 1rem;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .cta-section {
                padding: 36px 20px;
            }
            .cta-section h3 {
                font-size: 1.3rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-featured-image {
                border-radius: var(--radius);
            }
        }

        @media (max-width: 520px) {
            .article-banner {
                padding: 36px 16px 24px;
                padding-top: 58px;
                min-height: 120px;
            }
            .article-banner .breadcrumb {
                font-size: 0.78rem;
                gap: 4px;
            }
            .article-main {
                padding: 20px 14px 36px;
            }
            .article-header h1 {
                font-size: 1.3rem;
            }
            .article-meta {
                font-size: 0.8rem;
                gap: 10px;
            }
            .article-body {
                font-size: 0.95rem;
                line-height: 1.75;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .related-section {
                padding: 32px 14px 40px;
            }
            .related-section h3 {
                font-size: 1.25rem;
            }
            .cta-section {
                padding: 28px 16px;
            }
            .cta-section h3 {
                font-size: 1.15rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
            .site-footer {
                padding: 32px 16px 20px;
            }
            .sidebar-logo a {
                font-size: 1.1rem;
            }
            .article-featured-image {
                border-radius: var(--radius-sm);
                margin-bottom: 20px;
            }
            .article-tags {
                gap: 6px;
            }
            .article-tags .tag {
                font-size: 0.75rem;
                padding: 5px 10px;
            }
        }

        @media (min-width: 769px) {
            .sidebar-overlay {
                display: none !important;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1B3A5C;
            --color-primary-light: #264F78;
            --color-primary-dark: #0F2438;
            --color-accent: #C8953E;
            --color-accent-light: #D9A84E;
            --color-accent-dark: #A67A2E;
            --color-link: #2D6DA4;
            --color-link-hover: #1B3A5C;
            --color-bg: #F6F7F9;
            --color-surface: #FFFFFF;
            --color-text: #1E293B;
            --color-text-muted: #64748B;
            --color-text-light: #94A3B8;
            --color-border: #E2E8F0;
            --color-border-light: #F1F5F9;
            --color-success: #10B981;
            --color-success-bg: #ECFDF5;
            --color-warning: #F59E0B;
            --color-warning-bg: #FFFBEB;
            --color-info: #3B82F6;
            --color-info-bg: #EFF6FF;
            --color-sidebar: #0D1B2A;
            --color-sidebar-hover: #152840;
            --color-sidebar-active: #1B3A5C;
            --color-sidebar-text: #CBD5E1;
            --color-sidebar-text-active: #FFFFFF;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.07);
            --shadow-lg: 0 8px 28px rgba(0,0,0,0.10);
            --shadow-xl: 0 14px 40px rgba(0,0,0,0.12);
            --sidebar-width: 260px;
            --header-mobile-height: 60px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

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

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

        ul, ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.3;
            color: var(--color-text);
            font-weight: 700;
        }
        h1 { font-size: 2rem; }
        h2 { font-size: 1.625rem; }
        h3 { font-size: 1.25rem; }
        h4 { font-size: 1.075rem; }

        /* ========== 侧边栏 ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-sidebar);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform var(--transition-base);
            box-shadow: 2px 0 24px rgba(0,0,0,0.18);
        }

        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .sidebar-logo a {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .sidebar-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 16px;
            border-radius: var(--radius-md);
            color: var(--color-sidebar-text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .sidebar-nav a .nav-icon {
            font-size: 1.15rem;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            background: var(--color-sidebar-hover);
            color: #FFFFFF;
        }
        .sidebar-nav a.active {
            background: var(--color-sidebar-active);
            color: var(--color-sidebar-text-active);
            font-weight: 700;
            box-shadow: inset 3px 0 0 var(--color-accent);
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.78rem;
            color: rgba(255,255,255,0.4);
            text-align: center;
        }

        /* ========== 主内容区 ========== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .main-content {
            flex: 1;
            padding-bottom: 0;
        }

        /* ========== 移动端顶部栏 ========== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-mobile-height);
            background: var(--color-sidebar);
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 18px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.15);
        }
        .mobile-header .mobile-logo {
            font-size: 1.05rem;
            font-weight: 800;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .mobile-logo .logo-icon-sm {
            width: 30px;
            height: 30px;
            border-radius: 5px;
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
        }
        .hamburger-btn {
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            cursor: pointer;
            background: none;
            border: none;
            z-index: 1001;
        }
        .hamburger-btn:hover {
            background: rgba(255,255,255,0.08);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: #FFFFFF;
            border-radius: 2px;
            transition: all var(--transition-fast);
            transform-origin: center;
        }
        .sidebar-open .hamburger-btn span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .sidebar-open .hamburger-btn span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .sidebar-open .hamburger-btn span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* 移动端遮罩 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.55);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .sidebar-overlay.visible {
            opacity: 1;
        }

        /* ========== 容器 ========== */
        .container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== 板块间距 ========== */
        .section {
            padding: 60px 0;
        }
        .section-sm {
            padding: 40px 0;
        }
        .section-lg {
            padding: 80px 0;
        }

        /* ========== 分类页 Banner ========== */
        .category-banner {
            position: relative;
            padding: 70px 0 64px;
            background: var(--color-primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            border-bottom: 3px solid var(--color-accent);
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13,27,42,0.88) 0%, rgba(27,58,92,0.78) 50%, rgba(13,27,42,0.85) 100%);
            z-index: 1;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .category-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-accent);
            color: #fff;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
        }
        .category-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #FFFFFF;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }
        .category-banner .banner-subtitle {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.78);
            max-width: 600px;
            line-height: 1.6;
        }
        .category-banner .banner-stats {
            display: flex;
            gap: 36px;
            margin-top: 28px;
            flex-wrap: wrap;
        }
        .category-banner .banner-stat {
            text-align: left;
        }
        .category-banner .banner-stat .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-accent-light);
            line-height: 1;
        }
        .category-banner .banner-stat .stat-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.6);
            margin-top: 4px;
        }

        /* ========== 板块标题 ========== */
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-header .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 8px;
        }
        .section-header h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .section-header .section-desc {
            font-size: 1rem;
            color: var(--color-text-muted);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== 步骤流程 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            text-align: center;
            border: 1px solid var(--color-border);
            position: relative;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            counter-increment: step-counter;
        }
        .step-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-accent);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.15rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            position: relative;
        }
        .step-card .step-number::after {
            content: counter(step-counter);
            position: absolute;
        }
        .step-card:nth-child(2) .step-number { background: var(--color-link); }
        .step-card:nth-child(3) .step-number { background: var(--color-accent); }
        .step-card:nth-child(4) .step-number { background: var(--color-success); }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--color-text-muted);
            line-height: 1.55;
        }

        /* ========== 内容卡片网格 ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cards-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .content-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .content-card .card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: #E8ECF1;
        }
        .content-card .card-body {
            padding: 22px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 12px;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
            align-self: flex-start;
        }
        .tag-guide { background: var(--color-info-bg); color: var(--color-info); }
        .tag-notice { background: var(--color-warning-bg); color: var(--color-warning); }
        .tag-hot { background: #FEF2F2; color: #EF4444; }
        .tag-new { background: var(--color-success-bg); color: var(--color-success); }
        .content-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .content-card h3 a {
            color: var(--color-text);
            text-decoration: none;
        }
        .content-card h3 a:hover {
            color: var(--color-link);
        }
        .content-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--color-text-muted);
            line-height: 1.55;
            flex: 1;
        }
        .content-card .card-meta {
            font-size: 0.78rem;
            color: var(--color-text-light);
            margin-top: 12px;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
        }

        /* ========== 资源列表 ========== */
        .resource-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .resource-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: all var(--transition-fast);
            cursor: pointer;
            box-shadow: var(--shadow-sm);
        }
        .resource-item:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-md);
            background: #FAFBFC;
        }
        .resource-item .resource-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--color-info-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
        }
        .resource-item .resource-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .resource-item .resource-info span {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            text-align: left;
            font-weight: 700;
            font-size: 1rem;
            color: var(--color-text);
            background: transparent;
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--color-link);
        }
        .faq-question .faq-arrow {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            color: var(--color-text-muted);
        }
        .faq-item.open .faq-question .faq-arrow {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--color-text-muted);
            line-height: 1.65;
        }

        /* ========== CTA 板块 ========== */
        .cta-section {
            background: var(--color-primary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
            padding: 70px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27,58,92,0.92) 0%, rgba(13,27,42,0.9) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.75);
            margin-bottom: 28px;
            max-width: 550px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            text-decoration: none;
            letter-spacing: 0.3px;
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: var(--color-accent);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(200,149,62,0.35);
        }
        .btn-primary:hover {
            background: var(--color-accent-light);
            color: #FFFFFF;
            box-shadow: 0 6px 20px rgba(200,149,62,0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: #FFFFFF;
            border: 2px solid rgba(255,255,255,0.5);
        }
        .btn-outline:hover {
            border-color: #FFFFFF;
            color: #FFFFFF;
            background: rgba(255,255,255,0.08);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .btn-ghost {
            background: transparent;
            color: var(--color-link);
            padding: 8px 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
        }
        .btn-ghost:hover {
            background: var(--color-info-bg);
            color: var(--color-link-hover);
        }
        .btn-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* ========== 信息提示框 ========== */
        .info-box {
            background: var(--color-info-bg);
            border-left: 4px solid var(--color-info);
            border-radius: var(--radius-md);
            padding: 18px 22px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.92rem;
            color: var(--color-text);
            line-height: 1.6;
        }
        .info-box .info-icon {
            font-size: 1.3rem;
            flex-shrink: 0;
            margin-top: 1px;
        }
        .info-box.warning {
            background: var(--color-warning-bg);
            border-left-color: var(--color-warning);
        }
        .info-box.success {
            background: var(--color-success-bg);
            border-left-color: var(--color-success);
        }

        /* ========== 高亮卡片 ========== */
        .highlight-card {
            background: var(--color-surface);
            border: 2px solid var(--color-accent);
            border-radius: var(--radius-lg);
            padding: 28px 30px;
            box-shadow: var(--shadow-md);
            text-align: center;
        }
        .highlight-card h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .highlight-card p {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0D1B2A;
            color: rgba(255,255,255,0.7);
            padding: 50px 0 24px;
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .site-footer h4 {
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
        }
        .site-footer a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            display: block;
            margin-bottom: 6px;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--color-accent-light);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }
        .site-footer .footer-bottom strong {
            color: rgba(255,255,255,0.7);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .resource-list {
                grid-template-columns: 1fr 1fr;
            }
            .category-banner h1 {
                font-size: 1.9rem;
            }
            .container, .container-wide, .container-narrow {
                padding: 0 24px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.sidebar-visible {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }
            .sidebar-overlay.visible {
                pointer-events: auto;
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: var(--header-mobile-height);
            }
            .cards-grid,
            .cards-grid.cols-2 {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .resource-list {
                grid-template-columns: 1fr;
            }
            .category-banner {
                padding: 48px 0 40px;
            }
            .category-banner h1 {
                font-size: 1.55rem;
            }
            .category-banner .banner-stats {
                gap: 20px;
            }
            .category-banner .banner-stat .stat-number {
                font-size: 1.5rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-lg {
                padding: 52px 0;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .container, .container-wide, .container-narrow {
                padding: 0 18px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .category-banner h1 {
                font-size: 1.35rem;
            }
            .category-banner .banner-subtitle {
                font-size: 0.9rem;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
        }