/* roulang page: index */
:root {
            --primary: #0a1f3f;
            --primary-light: #132d56;
            --primary-lighter: #1a3d6e;
            --accent: #e8890c;
            --accent-light: #ffa940;
            --accent-soft: #fff3e0;
            --bg: #f4f5f7;
            --bg-alt: #eef0f4;
            --white: #ffffff;
            --text: #1a2332;
            --text-secondary: #556477;
            --text-light: #8896a7;
            --border: #e1e5eb;
            --border-light: #eef0f3;
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-xs: 0 1px 4px rgba(10, 31, 63, 0.04);
            --shadow: 0 2px 14px rgba(10, 31, 63, 0.06);
            --shadow-md: 0 6px 28px rgba(10, 31, 63, 0.09);
            --shadow-lg: 0 10px 44px rgba(10, 31, 63, 0.12);
            --shadow-xl: 0 16px 56px rgba(10, 31, 63, 0.16);
            --sidebar-width: 250px;
            --header-height-mobile: 60px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }

        *,
        *::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-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            flex-direction: row;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== SIDEBAR / NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            box-shadow: 2px 0 24px rgba(10, 31, 63, 0.18);
            transition: transform var(--transition);
            overflow-y: auto;
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-brand .logo-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.03em;
            display: block;
            line-height: 1.3;
        }

        .sidebar-brand .logo-sub {
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 2px;
            letter-spacing: 0.04em;
        }

        .sidebar-nav {
            flex: 1;
            padding: 18px 14px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.78);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            letter-spacing: 0.02em;
            position: relative;
        }

        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.07);
            color: #ffffff;
        }

        .sidebar-nav a.active {
            background: var(--accent);
            color: #ffffff;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(232, 137, 12, 0.3);
        }

        .sidebar-nav a .nav-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            opacity: 0.85;
        }

        .sidebar-nav a.active .nav-icon {
            opacity: 1;
        }

        .sidebar-footer {
            padding: 16px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .sidebar-footer .sidebar-cta {
            display: block;
            width: 100%;
            padding: 11px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: var(--radius-sm);
            text-align: center;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }

        .sidebar-footer .sidebar-cta:hover {
            background: var(--accent-light);
            box-shadow: 0 4px 18px rgba(232, 137, 12, 0.35);
            transform: translateY(-1px);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin-left var(--transition);
        }

        .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 28px;
        }

        /* ========== HERO ========== */
        .hero {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: linear-gradient(155deg, #0a1f3f 0%, #132d56 40%, #0f2648 100%);
            overflow: hidden;
            padding: 60px 0;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            mix-blend-mode: overlay;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, transparent 0%, rgba(10, 31, 63, 0.7) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #ffffff;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 22px;
            backdrop-filter: blur(6px);
        }

        .hero-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(232, 137, 12, 0.7);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(232, 137, 12, 0);
            }
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
            line-height: 1.2;
        }

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

        .hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.78);
            max-width: 520px;
            line-height: 1.7;
            margin-bottom: 32px;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: #ffffff;
            box-shadow: 0 4px 18px rgba(232, 137, 12, 0.3);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            box-shadow: 0 6px 24px rgba(232, 137, 12, 0.4);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline:hover {
            border-color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }

        .btn-sm {
            padding: 9px 20px;
            font-size: 0.85rem;
            border-radius: 40px;
        }

        .btn-ghost {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--border);
            padding: 10px 22px;
            border-radius: 40px;
            font-weight: 500;
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-soft);
        }

        /* ========== SECTION COMMONS ========== */
        .section {
            padding: 70px 0;
        }

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

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

        .section-header .section-tag {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.82rem;
            letter-spacing: 0.06em;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

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

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

        .feature-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 32px 26px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            font-size: 1.4rem;
            color: var(--accent);
            flex-shrink: 0;
        }

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

        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.65;
        }

        .feature-card .card-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.05em;
        }

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

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

        .category-entry-img {
            width: 38%;
            min-height: 260px;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }

        .category-entry-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .category-entry-body {
            padding: 36px 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .category-entry-body .entry-tag {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.78rem;
            letter-spacing: 0.05em;
            padding: 5px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            width: fit-content;
        }

        .category-entry-body h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .category-entry-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 18px;
            line-height: 1.6;
        }

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

        .cms-list-item {
            background: var(--white);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 18px;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
        }

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

        .cms-list-thumb {
            width: 72px;
            height: 56px;
            border-radius: var(--radius-xs);
            flex-shrink: 0;
            overflow: hidden;
            background: var(--bg-alt);
        }

        .cms-list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .cms-list-info {
            flex: 1;
            min-width: 0;
        }

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

        .cms-list-item:hover .cms-list-info h4 {
            color: var(--accent);
        }

        .cms-list-meta {
            font-size: 0.82rem;
            color: var(--text-light);
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

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

        .cms-empty {
            text-align: center;
            padding: 40px;
            color: var(--text-light);
            font-size: 0.95rem;
            background: var(--white);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ========== STATS ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--white);
            border-radius: var(--radius);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

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

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            margin-bottom: 4px;
        }

        .stat-number .accent-num {
            color: var(--accent);
        }

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

        /* ========== PROCESS ========== */
        .process-list {
            display: flex;
            gap: 0;
            position: relative;
        }

        .process-step {
            flex: 1;
            text-align: center;
            position: relative;
            padding: 20px 16px;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 56px;
            left: 60%;
            width: 80%;
            height: 2px;
            background: var(--border);
            z-index: 0;
        }

        .process-step:last-child::after {
            display: none;
        }

        .process-step .step-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--white);
            border: 3px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--primary);
            position: relative;
            z-index: 1;
            transition: all var(--transition);
        }

        .process-step:hover .step-circle {
            border-color: var(--accent);
            background: var(--accent-soft);
            color: var(--accent);
        }

        .process-step h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

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

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

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

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

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

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

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }

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

        .faq-item.open .faq-arrow {
            background: var(--accent-soft);
            color: var(--accent);
            transform: rotate(180deg);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin: 0 32px 70px;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

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

        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            max-width: 500px;
            margin: 0 auto 24px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 40px 32px 28px;
            margin-top: auto;
        }

        .footer-inner {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-start;
            gap: 30px;
        }

        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 280px;
            line-height: 1.6;
        }

        .footer-links {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .footer-links h5 {
            color: #ffffff;
            font-size: 0.9rem;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            padding: 3px 0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            max-width: 1100px;
            margin: 20px auto 0;
            padding-top: 18px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        /* ========== MOBILE HAMBURGER ========== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 14px;
            left: 14px;
            z-index: 1100;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-xs);
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.3rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-entry-block {
                flex-direction: column;
            }
            .category-entry-img {
                width: 100%;
                min-height: 200px;
                max-height: 240px;
            }
            .hero h1 {
                font-size: 2.3rem;
            }
            .process-list {
                flex-wrap: wrap;
                gap: 20px;
            }
            .process-step {
                flex: 0 0 calc(50% - 10px);
            }
            .process-step::after {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .mobile-toggle {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: var(--header-height-mobile);
            }
            .hero {
                min-height: 380px;
                padding: 40px 20px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 18px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .section {
                padding: 44px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .cta-section {
                margin: 0 14px 44px;
                padding: 36px 22px;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cms-list-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 16px;
            }
            .cms-list-thumb {
                width: 100%;
                height: 140px;
            }
            .process-list {
                flex-direction: column;
                gap: 16px;
            }
            .process-step {
                flex: 1;
            }
            .footer-inner {
                flex-direction: column;
                gap: 20px;
            }
            .footer-links {
                gap: 20px;
            }
            .category-entry-body {
                padding: 22px 18px;
            }
            .category-entry-body h3 {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 10px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1a3352;
            --color-primary-deep: #0f1f33;
            --color-accent: #e8932b;
            --color-accent-hover: #d17c1f;
            --color-accent-light: #fef3e4;
            --color-bg: #f4f5f7;
            --color-surface: #ffffff;
            --color-text: #1a1a1a;
            --color-text-secondary: #5a6270;
            --color-text-weak: #88909c;
            --color-border: #e2e5ea;
            --color-border-light: #eef0f3;
            --color-sidebar-bg: #0f1f33;
            --color-sidebar-text: #b0becf;
            --color-sidebar-hover: #1a3352;
            --color-sidebar-active: #e8932b;
            --color-success: #10b981;
            --color-tag-bg: #eef4fb;
            --color-tag-text: #2c5f8a;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-xl: 0 14px 44px rgba(0,0,0,0.12);
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --sidebar-width: 250px;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
        }
        *,
        *::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);
            display: flex;
            min-height: 100vh;
            flex-direction: row;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.35;
            font-weight: 600;
            color: var(--color-text);
        }

        /* ============ SIDEBAR NAVIGATION ============ */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--color-sidebar-bg);
            display: flex;
            flex-direction: column;
            z-index: 100;
            overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.06);
            box-shadow: 2px 0 24px rgba(0,0,0,0.18);
        }
        .sidebar-brand {
            padding: 28px 22px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px solid rgba(255,255,255,0.07);
        }
        .sidebar-brand-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .sidebar-brand-icon svg {
            width: 22px;
            height: 22px;
            color: #fff;
        }
        .sidebar-brand-text {
            font-size: 17px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .sidebar-nav {
            flex: 1;
            padding: 14px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-md);
            color: var(--color-sidebar-text);
            font-size: 14.5px;
            font-weight: 500;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.2px;
        }
        .sidebar-nav a:hover {
            background: var(--color-sidebar-hover);
            color: #e0e8f0;
        }
        .sidebar-nav a.active {
            background: rgba(232,147,43,0.13);
            color: var(--color-sidebar-active);
            font-weight: 600;
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 22px;
            background: var(--color-sidebar-active);
            border-radius: 0 3px 3px 0;
        }
        .nav-icon {
            width: 19px;
            height: 19px;
            flex-shrink: 0;
            opacity: 0.85;
        }
        .sidebar-nav a.active .nav-icon {
            opacity: 1;
            color: var(--color-sidebar-active);
        }
        .sidebar-footer-info {
            padding: 16px 22px;
            border-top: 1px solid rgba(255,255,255,0.07);
            font-size: 12px;
            color: rgba(176,190,207,0.6);
            letter-spacing: 0.3px;
        }

        /* ============ MOBILE HEADER ============ */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: var(--color-sidebar-bg);
            z-index: 99;
            align-items: center;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .mobile-header-brand {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
        }
        .mobile-menu-toggle {
            margin-left: auto;
            width: 36px;
            height: 36px;
            background: rgba(255,255,255,0.08);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.55);
            z-index: 98;
        }
        .mobile-overlay.show {
            display: block;
        }
        .sidebar.mobile-open {
            transform: translateX(0);
        }

        /* ============ MAIN WRAPPER ============ */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .main-content {
            flex: 1;
            padding: 32px 36px 48px;
            max-width: 920px;
            width: 100%;
            margin: 0 auto;
        }

        /* ============ BREADCRUMB ============ */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 13.5px;
            color: var(--color-text-weak);
            margin-bottom: 20px;
            letter-spacing: 0.2px;
        }
        .breadcrumb a {
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-sep {
            color: var(--color-border);
            font-size: 11px;
        }
        .breadcrumb-current {
            color: var(--color-text);
            font-weight: 500;
            pointer-events: none;
        }

        /* ============ ARTICLE HEADER ============ */
        .article-header {
            margin-bottom: 28px;
        }
        .article-category-tag {
            display: inline-block;
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
            letter-spacing: 0.4px;
            margin-bottom: 14px;
        }
        .article-title {
            font-size: 2.1rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.3px;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--color-text-weak);
        }
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-icon {
            width: 15px;
            height: 15px;
            opacity: 0.6;
        }

        /* ============ ARTICLE FEATURED IMAGE ============ */
        .article-featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow-md);
            background: var(--color-border-light);
            position: relative;
        }
        .article-featured-image img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            max-height: 480px;
        }

        /* ============ ARTICLE BODY ============ */
        .article-body {
            font-size: 16.5px;
            line-height: 1.85;
            color: var(--color-text);
            letter-spacing: 0.2px;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--color-primary);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--color-border-light);
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 26px 0 12px;
            color: var(--color-text);
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin: 12px 0 20px 22px;
            padding-left: 6px;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
            padding-left: 4px;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
            padding-left: 4px;
        }
        .article-body blockquote {
            border-left: 4px solid var(--color-accent);
            background: var(--color-accent-light);
            padding: 16px 22px;
            margin: 24px 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--color-text-secondary);
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body a {
            color: var(--color-accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--color-accent-hover);
        }
        .article-body strong {
            font-weight: 600;
            color: var(--color-text);
        }

        /* ============ ARTICLE FOOTER ============ */
        .article-footer-section {
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--color-border);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
        }
        .article-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .article-tag {
            font-size: 12.5px;
            background: var(--color-bg);
            color: var(--color-text-secondary);
            padding: 5px 12px;
            border-radius: 16px;
            border: 1px solid var(--color-border);
            letter-spacing: 0.2px;
            transition: all var(--transition-fast);
        }
        .article-tag:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
        }
        .article-back-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-accent);
            transition: color var(--transition-fast);
            letter-spacing: 0.2px;
        }
        .article-back-link:hover {
            color: var(--color-accent-hover);
        }
        .article-back-link svg {
            width: 16px;
            height: 16px;
        }

        /* ============ NOT FOUND STATE ============ */
        .not-found-block {
            text-align: center;
            padding: 60px 24px;
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            margin: 20px 0;
        }
        .not-found-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            background: var(--color-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-weak);
        }
        .not-found-icon svg {
            width: 36px;
            height: 36px;
        }
        .not-found-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .not-found-desc {
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            font-size: 15px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-accent);
            color: #fff;
            padding: 11px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background: var(--color-accent-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

        /* ============ RELATED POSTS ============ */
        .related-section {
            margin-top: 44px;
        }
        .related-section-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--color-text);
            letter-spacing: 0.2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border-light);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .related-card-image {
            height: 150px;
            overflow: hidden;
            background: var(--color-border-light);
        }
        .related-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-normal);
        }
        .related-card:hover .related-card-image img {
            transform: scale(1.04);
        }
        .related-card-body {
            padding: 14px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .related-card-category {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-accent);
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .related-card-title {
            font-size: 14.5px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-date {
            font-size: 12.5px;
            color: var(--color-text-weak);
            margin-top: auto;
        }

        /* ============ SITE FOOTER ============ */
        .site-footer {
            background: var(--color-primary-deep);
            color: #c0ccd8;
            padding: 32px 36px 20px;
            font-size: 14px;
            letter-spacing: 0.2px;
        }
        .footer-inner {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            max-width: 920px;
            margin-left: auto;
            margin-right: auto;
        }
        .footer-brand {
            flex: 1;
            min-width: 200px;
        }
        .footer-logo {
            font-size: 18px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .footer-brand p {
            color: #8898aa;
            font-size: 13.5px;
            line-height: 1.6;
        }
        .footer-links {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .footer-links h5 {
            font-size: 14px;
            font-weight: 600;
            color: #e0e6ed;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .footer-links a {
            display: block;
            color: #8898aa;
            font-size: 13.5px;
            margin-bottom: 6px;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 16px;
            text-align: center;
            font-size: 12.5px;
            color: #6b7d8e;
            max-width: 920px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
            }
            .article-title {
                font-size: 1.7rem;
            }
            .main-content {
                padding: 24px 24px 36px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }
        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .sidebar {
                position: fixed;
                top: 0;
                left: 0;
                width: 260px;
                height: 100vh;
                transform: translateX(-100%);
                transition: transform var(--transition-normal);
                z-index: 100;
                box-shadow: 4px 0 28px rgba(0,0,0,0.3);
            }
            .sidebar.mobile-open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .mobile-overlay {
                display: none;
            }
            .mobile-overlay.show {
                display: block;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }
            .main-content {
                padding: 20px 16px 32px;
            }
            .article-title {
                font-size: 1.45rem;
            }
            .article-body {
                font-size: 15.5px;
                line-height: 1.75;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-featured-image img {
                max-height: 260px;
            }
            .site-footer {
                padding: 24px 16px 16px;
            }
            .footer-inner {
                flex-direction: column;
                gap: 20px;
            }
            .footer-links {
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .article-title {
                font-size: 1.25rem;
            }
            .article-body {
                font-size: 15px;
            }
            .article-body h2 {
                font-size: 1.2rem;
            }
            .article-body h3 {
                font-size: 1.05rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 13px;
            }
            .breadcrumb {
                font-size: 12.5px;
            }
        }

/* roulang page: category1 */
/* ==================== 设计变量 ==================== */
        :root {
            --color-primary: #1e40af;
            --color-primary-light: #3b82f6;
            --color-primary-dark: #1e3a8a;
            --color-accent: #f59e0b;
            --color-accent-light: #fbbf24;
            --color-bg: #f8fafc;
            --color-surface: #ffffff;
            --color-surface-alt: #f1f5f9;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --color-tag-bg: #eff6ff;
            --color-tag-text: #1e40af;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
            --sidebar-width: 260px;
            --header-mobile-height: 60px;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }

        /* ==================== Reset/Base ==================== */
        *,
        *::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);
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-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-fast);
        }
        a:hover {
            color: var(--color-primary-light);
        }
        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);
        }

        /* ==================== Sidebar / 左侧导航 ==================== */
        .sidebar {
            position: sticky;
            top: 0;
            width: var(--sidebar-width);
            min-width: var(--sidebar-width);
            height: 100vh;
            background: linear-gradient(180deg, #0f172a 0%, #1e293b 60%, #1e3a8a 100%);
            color: #ffffff;
            display: flex;
            flex-direction: column;
            z-index: 100;
            overflow-y: auto;
            transition: transform var(--transition-slow), width var(--transition-slow);
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.18);
        }
        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            flex-shrink: 0;
        }
        .sidebar-logo {
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .sidebar-logo .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--color-accent);
            display: inline-block;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(245, 158, 11, 0.7);
        }
        .sidebar-tagline {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 6px;
            letter-spacing: 0.02em;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: rgba(255, 255, 255, 0.78);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }
        .sidebar-nav a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
        }
        .sidebar-nav a.active {
            background: rgba(255, 255, 255, 0.13);
            color: #ffffff;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }
        .sidebar-nav a.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 28px;
            background: var(--color-accent);
            border-radius: 0 3px 3px 0;
        }
        .nav-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            opacity: 0.85;
        }
        .sidebar-nav a.active .nav-icon {
            opacity: 1;
        }
        .sidebar-footer-info {
            padding: 16px 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.72rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
            flex-shrink: 0;
        }

        /* ==================== 移动端顶部导航 ==================== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-mobile-height);
            background: #0f172a;
            color: #ffffff;
            z-index: 200;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.25);
        }
        .mobile-logo {
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-logo .logo-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            display: inline-block;
            box-shadow: 0 0 8px rgba(245, 158, 11, 0.7);
        }
        .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);
            z-index: 210;
        }
        .hamburger-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: #ffffff;
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .hamburger-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 150;
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .mobile-overlay.show {
            opacity: 1;
        }

        /* ==================== 主内容区 ==================== */
        .main-wrapper {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }
        .main-content {
            flex: 1;
            padding: 0;
        }

        /* ==================== 分类页头 Banner ==================== */
        .category-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 58, 138, 0.82) 50%, rgba(15, 23, 42, 0.9) 100%),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 60px 48px 56px;
            color: #ffffff;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .category-banner-inner {
            max-width: 960px;
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-accent-light);
        }
        .breadcrumb .separator {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: #ffffff;
            font-weight: 500;
        }
        .category-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: #ffffff;
            margin-bottom: 12px;
            line-height: 1.25;
        }
        .category-banner .category-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            line-height: 1.7;
        }
        .category-stats {
            display: flex;
            gap: 28px;
            margin-top: 24px;
            flex-wrap: wrap;
        }
        .category-stat {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
        }
        .category-stat strong {
            color: var(--color-accent-light);
            font-size: 1.3rem;
            font-weight: 700;
        }

        /* ==================== 内容列表区域 ==================== */
        .content-section {
            padding: 40px 48px 60px;
            max-width: 1100px;
        }
        .section-header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 32px;
        }
        .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .section-title::after {
            content: '';
            display: inline-block;
            width: 40px;
            height: 3px;
            background: var(--color-accent);
            border-radius: 3px;
        }
        .sort-tabs {
            display: flex;
            gap: 6px;
            background: var(--color-surface-alt);
            border-radius: var(--radius-md);
            padding: 4px;
        }
        .sort-tab {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .sort-tab:hover {
            color: var(--color-text);
            background: rgba(0, 0, 0, 0.04);
        }
        .sort-tab.active {
            background: var(--color-surface);
            color: var(--color-primary);
            font-weight: 600;
            box-shadow: var(--shadow-xs);
        }

        /* ==================== 文章卡片网格 ==================== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border-light);
            cursor: pointer;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .article-card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-surface-alt);
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.06);
        }
        .article-card-image .card-tag-overlay {
            position: absolute;
            top: 14px;
            left: 14px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .card-tag-overlay .tag-badge {
            background: rgba(0, 0, 0, 0.7);
            color: #ffffff;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 0.72rem;
            font-weight: 500;
            backdrop-filter: blur(4px);
        }
        .article-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }
        .article-card:hover .article-card-body h3 {
            color: var(--color-primary-light);
        }
        .article-card-body .card-excerpt {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.65;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--color-text-muted);
            border-top: 1px solid var(--color-border-light);
            padding-top: 12px;
            gap: 10px;
            flex-wrap: wrap;
        }
        .article-card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .article-card-meta .meta-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-card-meta .meta-views {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .meta-icon {
            width: 14px;
            height: 14px;
            opacity: 0.55;
        }
        .read-more-link {
            font-weight: 600;
            color: var(--color-primary);
            font-size: 0.85rem;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
        }
        .read-more-link:hover {
            color: var(--color-primary-light);
            gap: 8px;
        }
        .read-more-link .arrow {
            transition: transform var(--transition-fast);
        }
        .read-more-link:hover .arrow {
            transform: translateX(3px);
        }

        /* ==================== 分页 ==================== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 44px;
            flex-wrap: wrap;
        }
        .pagination .page-btn {
            min-width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            transition: all var(--transition-fast);
        }
        .pagination .page-btn:hover {
            background: var(--color-surface-alt);
            color: var(--color-text);
            border-color: var(--color-text-muted);
        }
        .pagination .page-btn.active {
            background: var(--color-primary);
            color: #ffffff;
            border-color: var(--color-primary);
            font-weight: 700;
            box-shadow: var(--shadow-md);
        }
        .pagination .page-btn.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ==================== CTA 区块 ==================== */
        .cta-section {
            margin: 0 48px 48px;
            background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
            border-radius: var(--radius-xl);
            padding: 44px 40px;
            text-align: center;
            color: #ffffff;
            box-shadow: var(--shadow-lg);
        }
        .cta-section h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            margin-bottom: 24px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            background: var(--color-accent);
            color: #1e293b;
            transition: all var(--transition-base);
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
            letter-spacing: 0.01em;
        }
        .btn-cta:hover {
            background: var(--color-accent-light);
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
            color: #1e293b;
        }

        /* ==================== 页脚 ==================== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.75);
            padding: 40px 48px 24px;
            margin-top: auto;
            flex-shrink: 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 40px;
            max-width: 1100px;
            margin-bottom: 28px;
        }
        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.6;
        }
        .footer-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .footer-links h5 {
            font-size: 0.85rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .footer-links a {
            display: block;
            font-size: 0.83rem;
            color: rgba(255, 255, 255, 0.55);
            padding: 3px 0;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 18px;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
            max-width: 1100px;
        }

        /* ==================== 响应式断点 ==================== */
        @media (max-width: 1024px) {
            .category-banner {
                padding: 44px 28px 40px;
            }
            .category-banner h1 {
                font-size: 1.9rem;
            }
            .content-section {
                padding: 32px 28px 44px;
            }
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .cta-section {
                margin: 0 28px 40px;
                padding: 34px 28px;
            }
            .site-footer {
                padding: 32px 28px 20px;
            }
            .footer-inner {
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .sidebar {
                position: fixed;
                top: 0;
                left: 0;
                height: 100vh;
                width: 280px;
                transform: translateX(-100%);
                z-index: 180;
                border-radius: 0;
                box-shadow: 8px 0 32px rgba(0, 0, 0, 0.35);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .mobile-overlay {
                display: block;
                pointer-events: none;
            }
            .mobile-overlay.show {
                pointer-events: auto;
            }
            .main-wrapper {
                margin-top: var(--header-mobile-height);
            }
            .category-banner {
                padding: 32px 18px 28px;
                border-radius: 0;
            }
            .category-banner h1 {
                font-size: 1.5rem;
            }
            .category-banner .category-desc {
                font-size: 0.9rem;
            }
            .category-stats {
                gap: 16px;
                margin-top: 16px;
            }
            .category-stat {
                font-size: 0.8rem;
            }
            .category-stat strong {
                font-size: 1.1rem;
            }
            .content-section {
                padding: 24px 16px 36px;
            }
            .section-header-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .sort-tabs {
                width: 100%;
                justify-content: flex-start;
                overflow-x: auto;
            }
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-card-body {
                padding: 16px 16px 18px;
            }
            .article-card-body h3 {
                font-size: 1.05rem;
            }
            .cta-section {
                margin: 0 16px 32px;
                padding: 28px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h3 {
                font-size: 1.2rem;
            }
            .btn-cta {
                padding: 11px 24px;
                font-size: 0.9rem;
            }
            .site-footer {
                padding: 28px 16px 18px;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .pagination {
                gap: 4px;
                margin-top: 28px;
            }
            .pagination .page-btn {
                min-width: 35px;
                height: 35px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .category-banner {
                padding: 24px 14px 22px;
            }
            .category-banner h1 {
                font-size: 1.3rem;
            }
            .category-banner .category-desc {
                font-size: 0.82rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
                gap: 4px;
            }
            .content-section {
                padding: 20px 10px 28px;
            }
            .articles-grid {
                gap: 12px;
            }
            .article-card-body h3 {
                font-size: 0.95rem;
            }
            .article-card-body .card-excerpt {
                font-size: 0.8rem;
                -webkit-line-clamp: 2;
            }
            .article-card-meta {
                font-size: 0.72rem;
            }
            .cta-section {
                margin: 0 10px 24px;
                padding: 22px 16px;
            }
            .site-footer {
                padding: 22px 10px 14px;
            }
            .footer-links {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .sort-tab {
                padding: 6px 10px;
                font-size: 0.78rem;
            }
        }