/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f0e29;
            --primary-light: #1a1848;
            --primary-dark: #0a091a;
            --accent: #d4a84b;
            --accent-light: #e8c06a;
            --accent-dark: #b88e2e;
            --bg: #f5f6fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e2e5f0;
            --border-light: #f0f1f6;
            --shadow-sm: 0 2px 8px rgba(15, 14, 41, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 14, 41, 0.10);
            --shadow-lg: 0 16px 48px rgba(15, 14, 41, 0.14);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --sidebar-width: 260px;
            --header-h: 64px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== 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: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.4rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.15rem, 2.2vw, 1.5rem);
        }
        p {
            margin-bottom: 1em;
            color: var(--text-light);
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ===== Utility ===== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 12px;
        }
        .section-subtitle {
            text-align: center;
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 48px auto;
        }
        .text-accent {
            color: var(--accent);
        }
        .text-center {
            text-align: center;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .section {
                padding: 56px 0;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 75, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(212, 168, 75, 0.25);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: var(--text-white);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212, 168, 75, 0.25);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 18px 44px;
            font-size: 1.1rem;
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        @media (max-width: 520px) {
            .btn {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        /* ===== Tags / Badges ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 500;
            border-radius: 50px;
            background: rgba(212, 168, 75, 0.12);
            color: var(--accent-dark);
            border: 1px solid rgba(212, 168, 75, 0.20);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary);
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px 20px 26px;
        }
        .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary);
        }
        .card-text {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: 14px;
            flex-wrap: wrap;
        }
        .card .tag {
            font-size: 0.75rem;
        }

        /* ===== Sidebar Navigation (Desktop) ===== */
        .site-wrapper {
            display: flex;
            min-height: 100vh;
        }
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 100;
            overflow-y: auto;
            transition: transform var(--transition);
        }
        .sidebar-brand {
            padding: 32px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .sidebar-brand a {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-brand a i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .sidebar-brand a:hover {
            color: var(--accent);
        }
        .sidebar-menu {
            flex: 1;
            padding: 24px 16px;
        }
        .sidebar-menu ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .sidebar-menu ul li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.70);
            transition: all var(--transition);
        }
        .sidebar-menu ul li a i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.40);
            transition: color var(--transition);
        }
        .sidebar-menu ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-white);
        }
        .sidebar-menu ul li a:hover i {
            color: var(--accent);
        }
        .sidebar-menu ul li.active a {
            background: rgba(212, 168, 75, 0.12);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-menu ul li.active a i {
            color: var(--accent);
        }
        .sidebar-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
        }
        .sidebar-footer a {
            color: rgba(255, 255, 255, 0.50);
        }
        .sidebar-footer a:hover {
            color: var(--accent);
        }

        /* ===== Mobile Navigation ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: var(--primary);
            color: var(--text-white);
            z-index: 200;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 16px rgba(15, 14, 41, 0.20);
        }
        .mobile-nav-brand a {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-nav-brand a i {
            color: var(--accent);
        }
        .mobile-nav-toggle {
            width: 44px;
            height: 44px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }
        .mobile-nav-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .mobile-nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-white);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .mobile-nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .mobile-nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .mobile-nav-menu {
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: var(--primary-light);
            padding: 16px 20px 28px;
            transform: translateY(-110%);
            opacity: 0;
            transition: all var(--transition);
            z-index: 199;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 8px 32px rgba(15, 14, 41, 0.30);
        }
        .mobile-nav-menu.open {
            transform: translateY(0);
            opacity: 1;
        }
        .mobile-nav-menu ul {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav-menu ul li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            transition: all var(--transition);
        }
        .mobile-nav-menu ul li a i {
            width: 20px;
            color: rgba(255, 255, 255, 0.40);
        }
        .mobile-nav-menu ul li a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-white);
        }
        .mobile-nav-menu ul li.active a {
            background: rgba(212, 168, 75, 0.12);
            color: var(--accent);
        }

        /* ===== Main Content ===== */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            background: var(--bg);
        }
        @media (max-width: 768px) {
            .sidebar {
                display: none;
            }
            .mobile-nav {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--header-h);
            }
            .site-wrapper {
                flex-direction: column;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.50;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 14, 41, 0.88) 30%, rgba(15, 14, 41, 0.50) 70%, rgba(15, 14, 41, 0.30) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 60px 24px;
            color: var(--text-white);
        }
        .hero-content .badge {
            margin-bottom: 20px;
        }
        .hero-content h1 {
            color: var(--text-white);
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }
        .hero-content h1 span {
            color: var(--accent);
        }
        .hero-content p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            flex-wrap: wrap;
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-item .number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 60vh;
            }
            .hero-content {
                padding: 40px 20px;
            }
            .hero-stats {
                gap: 24px;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stat-item .number {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: rgba(212, 168, 75, 0.08);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent);
            transition: background var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(212, 168, 75, 0.16);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== Category Entry ===== */
        .category-entry {
            background: var(--primary);
            border-radius: var(--radius-lg);
            overflow: hidden;
            display: flex;
            align-items: center;
            min-height: 280px;
            box-shadow: var(--shadow-md);
        }
        .category-entry .entry-bg {
            flex: 0 0 45%;
            min-height: 280px;
            background: url('/assets/images/coverpic/cover-1.png') center center / cover no-repeat;
        }
        .category-entry .entry-body {
            flex: 1;
            padding: 40px 44px;
            color: var(--text-white);
        }
        .category-entry .entry-body h3 {
            color: var(--text-white);
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        .category-entry .entry-body h3 span {
            color: var(--accent);
        }
        .category-entry .entry-body p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1rem;
            max-width: 480px;
            margin-bottom: 24px;
        }
        @media (max-width: 768px) {
            .category-entry {
                flex-direction: column;
                min-height: auto;
            }
            .category-entry .entry-bg {
                flex: auto;
                width: 100%;
                min-height: 200px;
            }
            .category-entry .entry-body {
                padding: 28px 24px;
            }
            .category-entry .entry-body h3 {
                font-size: 1.3rem;
            }
        }

        /* ===== Posts / CMS List ===== */
        .post-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }
        .post-card .card-image {
            aspect-ratio: 16 / 9;
            width: 100%;
            object-fit: cover;
        }
        .post-card .card-body {
            padding: 20px 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card .card-body .card-title {
            font-size: 1.1rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .card-body .card-text {
            font-size: 0.9rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .post-card .card-meta {
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
            color: var(--text-light);
        }
        .empty-posts i {
            font-size: 2.4rem;
            color: var(--border);
            margin-bottom: 16px;
            display: block;
        }
        .empty-posts p {
            font-size: 1rem;
        }
        @media (max-width: 768px) {
            .post-list {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Stats Section ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 20px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-card .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-card .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px 20px;
            }
            .stat-card .stat-num {
                font-size: 1.8rem;
            }
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(212, 168, 75, 0.10);
            color: var(--accent);
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            transition: background var(--transition);
        }
        .step-card:hover .step-number {
            background: rgba(212, 168, 75, 0.20);
        }
        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            font-weight: 600;
            color: var(--primary);
            background: none;
            text-align: left;
            gap: 16px;
            cursor: pointer;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(212, 168, 75, 0.04);
        }
        .faq-question i {
            color: var(--accent);
            font-size: 1.1rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        @media (max-width: 520px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            color: var(--text-white);
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn {
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 44px 24px;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.50);
            padding: 48px 0 32px;
            margin-top: 40px;
        }
        .footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
        }
        .footer-brand {
            flex: 0 0 260px;
        }
        .footer-brand .logo {
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.40);
            line-height: 1.7;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }
        .footer-links .col h4 {
            color: var(--text-white);
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .footer-links .col ul li {
            margin-bottom: 8px;
        }
        .footer-links .col ul li a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition);
        }
        .footer-links .col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.30);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.40);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .footer .container {
                flex-direction: column;
                gap: 24px;
            }
            .footer-brand {
                flex: auto;
            }
            .footer-links {
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .footer-links {
                flex-direction: column;
                gap: 20px;
            }
            .footer {
                padding: 32px 0 24px;
            }
        }

        /* ===== focus / accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Search bar in hero ===== */
        .hero-search {
            display: flex;
            max-width: 480px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .hero-search:focus-within {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
        }
        .hero-search input {
            flex: 1;
            padding: 14px 20px;
            background: transparent;
            color: var(--text-white);
            font-size: 0.95rem;
        }
        .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }
        .hero-search button {
            padding: 14px 22px;
            color: var(--accent);
            font-size: 1.1rem;
            transition: color var(--transition);
        }
        .hero-search button:hover {
            color: var(--accent-light);
        }
        @media (max-width: 520px) {
            .hero-search {
                flex-direction: column;
                border-radius: var(--radius-sm);
                background: transparent;
                border: none;
                gap: 12px;
            }
            .hero-search input {
                background: rgba(255, 255, 255, 0.08);
                border-radius: 50px;
                border: 1px solid rgba(255, 255, 255, 0.12);
                padding: 12px 18px;
            }
            .hero-search button {
                background: var(--accent);
                color: var(--primary);
                border-radius: 50px;
                padding: 12px 18px;
                font-weight: 600;
                font-size: 0.95rem;
                justify-content: center;
                display: flex;
                align-items: center;
                gap: 8px;
            }
            .hero-search button:hover {
                background: var(--accent-light);
            }
        }

        /* ===== Divider ===== */
        .divider {
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin: 16px auto 20px;
        }
        .divider-left {
            margin: 16px 0 20px;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 1024px) and (min-width: 769px) {
            :root {
                --sidebar-width: 220px;
            }
            .sidebar-brand a {
                font-size: 1.05rem;
            }
            .sidebar-menu ul li a {
                padding: 12px 14px;
                font-size: 0.9rem;
            }
        }
        @media (max-width: 360px) {
            .container {
                padding: 0 16px;
            }
            .hero-content {
                padding: 28px 16px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 0.9rem;
            }
        }

        /* ===== Additional Decorative ===== */
        .glow-accent {
            box-shadow: 0 0 40px rgba(212, 168, 75, 0.08);
        }
        .bg-soft-accent {
            background: rgba(212, 168, 75, 0.04);
        }
        .border-accent {
            border-color: rgba(212, 168, 75, 0.20);
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #e94560;
            --accent-light: #ff6b7a;
            --accent-dark: #c2334a;
            --gold: #f5a623;
            --gold-light: #ffd369;
            --bg: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #2d3748;
            --text-light: #718096;
            --text-white: #f7fafc;
            --border: #e2e8f0;
            --border-light: #edf2f7;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-accent: 0 8px 32px rgba(233, 69, 96, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 260px;
            --header-height: 0px;
            --gap: 32px;
            --gap-sm: 20px;
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--primary);
        }

        h1 {
            font-size: 2.75rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.375rem;
        }
        h4 {
            font-size: 1.1rem;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--primary-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.2);
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .sidebar-brand a {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            letter-spacing: 0.3px;
        }

        .sidebar-brand a i {
            font-size: 1.6rem;
            color: var(--gold);
            filter: drop-shadow(0 0 8px rgba(245, 166, 35, 0.3));
        }

        .sidebar-menu {
            flex: 1;
            padding: 24px 16px;
            overflow-y: auto;
        }

        .sidebar-menu ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sidebar-menu li a {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
            position: relative;
        }

        .sidebar-menu li a i {
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }

        .sidebar-menu li a:hover {
            background: rgba(255, 255, 255, 0.07);
            color: var(--text-white);
        }

        .sidebar-menu li a:hover i {
            color: var(--gold);
        }

        .sidebar-menu li.active a {
            background: rgba(233, 69, 96, 0.15);
            color: var(--text-white);
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .sidebar-menu li.active a i {
            color: var(--accent);
        }

        .sidebar-footer {
            padding: 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
            line-height: 1.6;
        }

        .sidebar-footer a {
            color: rgba(255, 255, 255, 0.5);
        }

        .sidebar-footer a:hover {
            color: var(--gold);
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .page-content {
            flex: 1;
            padding: 40px 0 60px;
        }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--primary-dark);
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }

        .mobile-header .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .mobile-header .logo i {
            color: var(--gold);
            font-size: 1.4rem;
        }

        .mobile-menu-toggle {
            background: none;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 4px 8px;
            cursor: pointer;
            border-radius: 6px;
        }

        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== Mobile Sidebar Overlay ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        .sidebar-overlay.open {
            display: block;
        }

        .sidebar.mobile-open {
            transform: translateX(0);
        }

        /* ===== Banner / Hero (分类页首屏) ===== */
        .category-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 60%, #1a2a4a 100%);
            overflow: hidden;
            border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            margin: 0 var(--gap) var(--gap);
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }

        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(233, 69, 96, 0.10) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(245, 166, 35, 0.08) 0%, transparent 60%);
        }

        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            padding: 60px 40px;
        }

        .category-banner .banner-content h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }

        .category-banner .banner-content h1 i {
            color: var(--gold);
            margin-right: 12px;
        }

        .category-banner .banner-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.15rem;
            line-height: 1.7;
            max-width: 560px;
            margin: 0 auto;
        }

        .category-banner .banner-badge {
            display: inline-block;
            background: rgba(233, 69, 96, 0.2);
            color: var(--accent-light);
            padding: 6px 20px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            border: 1px solid rgba(233, 69, 96, 0.25);
            backdrop-filter: blur(8px);
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 60px 0;
        }

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

        .section-header h2 {
            font-size: 2rem;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            border-radius: 4px;
            margin: 12px auto 0;
        }

        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 16px auto 0;
        }

        /* ===== Guide Cards ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: var(--gap);
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            opacity: 0;
            transition: var(--transition);
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(233, 69, 96, 0.15);
        }

        .guide-card:hover::before {
            opacity: 1;
        }

        .guide-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--text-white);
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            box-shadow: 0 8px 20px rgba(233, 69, 96, 0.2);
        }

        .guide-card .card-icon.gold {
            background: linear-gradient(135deg, var(--gold), #d4891a);
            box-shadow: 0 8px 20px rgba(245, 166, 35, 0.25);
        }

        .guide-card .card-icon.teal {
            background: linear-gradient(135deg, #2dd4bf, #0d9488);
            box-shadow: 0 8px 20px rgba(45, 212, 191, 0.2);
        }

        .guide-card .card-icon.purple {
            background: linear-gradient(135deg, #a78bfa, #7c3aed);
            box-shadow: 0 8px 20px rgba(167, 139, 250, 0.2);
        }

        .guide-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .guide-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .guide-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .guide-card .card-tags span {
            background: var(--bg);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--text-light);
            border: 1px solid var(--border-light);
        }

        /* ===== Step Flow ===== */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: var(--gap);
            counter-reset: step;
        }

        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            position: relative;
            transition: var(--transition);
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .step-item .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 8px 20px rgba(233, 69, 96, 0.2);
        }

        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--primary);
        }

        .step-item p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--primary);
            gap: 16px;
        }

        .faq-question i {
            color: var(--accent);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin: 0 var(--gap);
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }

        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            color: var(--text-white);
            font-size: 2rem;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 32px;
        }

        .cta-section .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            background: var(--bg-card);
            color: var(--text);
            box-shadow: var(--shadow);
        }

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

        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--text-white);
            box-shadow: var(--shadow-accent);
        }

        .btn-primary:hover {
            box-shadow: 0 12px 40px rgba(233, 69, 96, 0.35);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.25);
            box-shadow: none;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.5);
            box-shadow: none;
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 0.85rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 0;
            margin-top: auto;
        }

        .footer .container {
            display: grid;
            grid-template-columns: 1.2fr 2fr;
            gap: 48px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .logo i {
            color: var(--gold);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .footer-links .col h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .footer-links .col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links .col ul a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            transition: var(--transition);
        }

        .footer-links .col ul a:hover {
            color: var(--gold);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.3);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a:hover {
            color: var(--gold);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .sidebar {
                width: 240px;
            }
            .main-content {
                margin-left: 240px;
            }
            .guide-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }

        @media (max-width: 768px) {
            :root {
                --gap: 20px;
            }

            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                width: 280px;
            }

            .sidebar.mobile-open {
                transform: translateX(0);
            }

            .mobile-header {
                display: flex;
            }

            .main-content {
                margin-left: 0;
            }

            .category-banner {
                min-height: 240px;
                margin: 0 var(--gap) var(--gap-sm);
                border-radius: 0 0 var(--radius) var(--radius);
            }

            .category-banner .banner-content {
                padding: 40px 20px;
            }

            .category-banner .banner-content h1 {
                font-size: 1.8rem;
            }

            .category-banner .banner-content p {
                font-size: 1rem;
            }

            .section {
                padding: 40px 0;
            }

            .section-header h2 {
                font-size: 1.6rem;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: var(--gap-sm);
            }

            .step-flow {
                grid-template-columns: 1fr 1fr;
                gap: var(--gap-sm);
            }

            .footer .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-links {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .cta-section {
                padding: 40px 24px;
                margin: 0 var(--gap);
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .category-banner .banner-content h1 {
                font-size: 1.4rem;
            }

            .category-banner .banner-content p {
                font-size: 0.9rem;
            }

            .step-flow {
                grid-template-columns: 1fr;
            }

            .footer-links {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .guide-card {
                padding: 24px 20px;
            }

            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Additional Utilities ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mt-2 {
            margin-top: 24px;
        }
        .mt-3 {
            margin-top: 40px;
        }
        .gap-1 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Cover Image Placeholder Style ===== */
        .cover-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--radius-sm) var(--radius-sm) 0 0;
        }

/* roulang page: article */
:root {
    --primary: #1a0a3e;
    --primary-light: #2d1b69;
    --primary-dark: #0f0524;
    --accent: #f0b90b;
    --accent-hover: #d4a509;
    --accent-light: #fce68a;
    --bg: #f8f7fc;
    --bg-card: #ffffff;
    --bg-sidebar: #12082a;
    --text: #1a1a2e;
    --text-light: #6b7280;
    --text-white: #f0eff5;
    --border: #e5e7eb;
    --border-light: #f0eff5;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow: 0 4px 24px rgba(0,0,0,0.07);
    --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
    --shadow-sidebar: 2px 0 30px rgba(0,0,0,0.3);
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --sidebar-width: 240px;
    --header-height: 64px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    display: flex;
    min-height: 100vh;
}
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
ul { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; }

/* ===== 左侧导航 ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    color: var(--text-white);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    box-shadow: var(--shadow-sidebar);
    overflow-y: auto;
    transition: transform var(--transition);
}
.sidebar-brand {
    padding: 24px 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.sidebar-brand a {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.sidebar-brand a i { color: var(--accent); font-size: 1.5rem; }
.sidebar-brand a span { background: linear-gradient(135deg, #fff 60%, var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.sidebar-menu { flex: 1; padding: 16px 0; }
.sidebar-menu ul li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: var(--transition);
}
.sidebar-menu ul li a i { width: 20px; text-align: center; font-size: 1.05rem; color: rgba(255,255,255,0.4); transition: var(--transition); }
.sidebar-menu ul li a:hover { background: rgba(255,255,255,0.06); color: #fff; border-left-color: var(--accent); }
.sidebar-menu ul li a:hover i { color: var(--accent); }
.sidebar-menu ul li.active a { background: rgba(240,185,11,0.10); color: #fff; border-left-color: var(--accent); font-weight: 600; }
.sidebar-menu ul li.active a i { color: var(--accent); }
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 0.8rem;
    color: rgba(255,255,255,0.35);
    text-align: center;
}
.sidebar-footer a { color: rgba(255,255,255,0.5); }
.sidebar-footer a:hover { color: var(--accent); }

/* ===== 移动端顶部导航 ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--header-height);
    background: var(--bg-sidebar);
    color: #fff;
    z-index: 999;
    padding: 0 16px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.mobile-header .logo a {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-weight: 700;
    font-size: 1.1rem;
}
.mobile-header .logo a i { color: var(--accent); }
.menu-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    padding: 8px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.menu-toggle:hover { background: rgba(255,255,255,0.1); }

/* ===== 主内容区 ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
.article-wrapper {
    flex: 1;
    padding: 40px 48px 60px;
    max-width: 960px;
    width: 100%;
    margin: 0 auto;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb span { color: var(--text-light); }
.breadcrumb .sep { color: #ccc; }

/* ===== 文章头部 ===== */
.article-header {
    margin-bottom: 32px;
}
.article-header .category-tag {
    display: inline-block;
    background: var(--accent-light);
    color: var(--primary-dark);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.3px;
    margin-bottom: 12px;
}
.article-header h1 {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--primary);
    margin-bottom: 14px;
    letter-spacing: -0.3px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 0.85rem;
    color: var(--text-light);
    align-items: center;
}
.article-meta i { margin-right: 4px; color: var(--accent); }
.article-meta .date i { color: var(--text-light); }

/* ===== 文章封面 ===== */
.article-cover {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--border-light);
}
.article-cover img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* ===== 文章正文 ===== */
.article-body {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text);
    margin-bottom: 40px;
}
.article-body p { margin-bottom: 1.2em; }
.article-body h2 { font-size: 1.5rem; font-weight: 700; margin: 1.6em 0 0.6em; color: var(--primary); }
.article-body h3 { font-size: 1.2rem; font-weight: 600; margin: 1.4em 0 0.5em; color: var(--primary-light); }
.article-body ul, .article-body ol { margin-bottom: 1.2em; padding-left: 1.5em; }
.article-body li { margin-bottom: 0.4em; }
.article-body ul li { list-style: disc; }
.article-body ol li { list-style: decimal; }
.article-body blockquote {
    border-left: 4px solid var(--accent);
    background: var(--bg);
    padding: 16px 20px;
    margin: 1.2em 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-light);
    font-style: italic;
}
.article-body code {
    background: var(--border-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--primary-light);
}
.article-body pre {
    background: var(--primary-dark);
    color: #e8e0f0;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 1.2em 0;
    font-size: 0.9rem;
    line-height: 1.6;
}
.article-body a { color: var(--primary-light); border-bottom: 1px solid var(--accent); }
.article-body a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ===== 文章标签 ===== */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-tags .tag {
    display: inline-block;
    background: var(--bg);
    color: var(--text-light);
    font-size: 0.8rem;
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.article-tags .tag:hover { background: var(--accent-light); color: var(--primary-dark); border-color: var(--accent); }

/* ===== 文章分享 ===== */
.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}
.article-share span { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }
.article-share a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-light);
    font-size: 1.1rem;
    transition: var(--transition);
}
.article-share a:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-2px); }

/* ===== 相关推荐 ===== */
.related-section {
    margin-bottom: 48px;
}
.related-section h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.related-section h2 i { color: var(--accent); }
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}
.related-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card .card-img {
    height: 160px;
    background: var(--border-light);
    overflow: hidden;
}
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body { padding: 16px 18px 18px; }
.related-card .card-body h3 { font-size: 0.95rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.related-card .card-body h3 a { color: var(--text); }
.related-card .card-body h3 a:hover { color: var(--accent); }
.related-card .card-body .meta { font-size: 0.75rem; color: var(--text-light); }

/* ===== CTA ===== */
.article-cta {
    text-align: center;
    padding: 32px 24px;
    background: linear-gradient(135deg, var(--bg), var(--border-light));
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
}
.article-cta p { font-size: 1.05rem; color: var(--text-light); margin-bottom: 18px; }
.article-cta .btn {
    display: inline-block;
    background: var(--accent);
    color: var(--primary-dark);
    font-weight: 700;
    padding: 12px 32px;
    border-radius: 40px;
    font-size: 0.95rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.article-cta .btn:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,185,11,0.3); }
.article-cta .btn i { margin-right: 8px; }

/* ===== 内容未找到 ===== */
.not-found {
    text-align: center;
    padding: 80px 20px;
}
.not-found i { font-size: 3.5rem; color: var(--text-light); margin-bottom: 20px; opacity: 0.5; }
.not-found h2 { font-size: 1.8rem; color: var(--primary); margin-bottom: 12px; }
.not-found p { color: var(--text-light); margin-bottom: 24px; font-size: 1.05rem; }
.not-found .btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    padding: 12px 32px;
    border-radius: 40px;
    transition: var(--transition);
}
.not-found .btn:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,10,62,0.25); }

/* ===== 页脚 ===== */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.75);
    padding: 48px 48px 0;
    margin-top: auto;
}
.footer .container { max-width: 1200px; margin: 0 auto; }
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { font-size: 1.15rem; font-weight: 700; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-brand .logo i { color: var(--accent); }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 320px; }
.footer-links h4 { color: #fff; font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.5px; }
.footer-links ul li { margin-bottom: 10px; }
.footer-links ul li a { color: rgba(255,255,255,0.5); font-size: 0.85rem; transition: var(--transition); }
.footer-links ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.3);
}
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 移动端适配 ===== */
@media (max-width: 1024px) {
    .article-wrapper { padding: 32px 28px 48px; }
    .article-header h1 { font-size: 1.7rem; }
    .article-cover img { height: 300px; }
    .footer { padding: 36px 28px 0; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .mobile-header { display: flex; }
    .main-content { margin-left: 0; padding-top: var(--header-height); }
    .article-wrapper { padding: 24px 18px 40px; }
    .article-header h1 { font-size: 1.4rem; }
    .article-body { font-size: 0.98rem; }
    .article-cover img { height: 200px; }
    .related-grid { grid-template-columns: 1fr 1fr; }
    .footer { padding: 28px 18px 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-brand p { max-width: 100%; }
}
@media (max-width: 520px) {
    .related-grid { grid-template-columns: 1fr; }
    .article-share { flex-wrap: wrap; }
    .breadcrumb { font-size: 0.78rem; }
    .article-header h1 { font-size: 1.2rem; }
    .article-meta { gap: 10px; font-size: 0.78rem; }
    .article-cta { padding: 24px 16px; }
    .article-cta .btn { width: 100%; text-align: center; }
    .not-found { padding: 48px 16px; }
    .not-found i { font-size: 2.5rem; }
    .not-found h2 { font-size: 1.3rem; }
}

/* ===== 遮罩层 ===== */
.overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 998;
}
.overlay.show { display: block; }

/* ===== 回到顶部 ===== */
.back-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 99;
    display: none;
    align-items: center;
    justify-content: center;
}
.back-top.show { display: flex; }
.back-top:hover { background: var(--primary-light); transform: translateY(-3px); }