/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #0b0e1a;
            --clr-primary-light: #141929;
            --clr-secondary: #1a2744;
            --clr-accent: #d4a853;
            --clr-accent-light: #e8c87a;
            --clr-accent-dark: #b8913a;
            --clr-bg: #0b0e1a;
            --clr-surface: rgba(255, 255, 255, 0.04);
            --clr-surface-hover: rgba(255, 255, 255, 0.08);
            --clr-border: rgba(212, 168, 83, 0.18);
            --clr-text: #f0f2f5;
            --clr-text-secondary: #b8c6db;
            --clr-text-muted: #7a8aa3;
            --clr-overlay: rgba(0, 0, 0, 0.65);
            --clr-glass: rgba(11, 14, 26, 0.75);
            --clr-glass-border: rgba(212, 168, 83, 0.12);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 40px rgba(212, 168, 83, 0.08);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 48px;
            --space-3xl: 64px;
            --space-4xl: 80px;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            min-height: 100vh;
        }

        a {
            color: var(--clr-accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-accent-light);
        }
        a:focus-visible {
            outline: 2px solid var(--clr-accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible {
            outline: 2px solid var(--clr-accent);
            outline-offset: 4px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--space-lg);
        }

        /* ===== 排版 ===== */
        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: var(--space-sm);
            color: var(--clr-text);
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--clr-text-secondary);
            max-width: 640px;
            margin-bottom: var(--space-2xl);
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        .text-accent {
            color: var(--clr-accent);
        }
        .text-muted {
            color: var(--clr-text-muted);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 14px 32px;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            line-height: 1.2;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--clr-accent);
            color: var(--clr-primary);
            border-color: var(--clr-accent);
        }
        .btn-primary:hover {
            background: var(--clr-accent-light);
            border-color: var(--clr-accent-light);
            color: var(--clr-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(212, 168, 83, 0.25);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-outline {
            background: transparent;
            color: var(--clr-accent);
            border-color: var(--clr-accent);
        }
        .btn-outline:hover {
            background: var(--clr-accent);
            color: var(--clr-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(212, 168, 83, 0.15);
        }
        .btn-outline:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-ghost {
            background: var(--clr-surface);
            color: var(--clr-text);
            border-color: transparent;
        }
        .btn-ghost:hover {
            background: var(--clr-surface-hover);
            color: var(--clr-accent);
            transform: translateY(-2px);
        }
        .btn-lg {
            padding: 18px 44px;
            font-size: 1.125rem;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.875rem;
        }
        .btn .fa-solid,
        .btn .fa-regular {
            font-size: 0.9em;
        }

        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: rgba(212, 168, 83, 0.12);
            color: var(--clr-accent);
            border: 1px solid rgba(212, 168, 83, 0.15);
        }
        .badge-primary {
            background: var(--clr-accent);
            color: var(--clr-primary);
            border-color: var(--clr-accent);
        }
        .badge-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--clr-text-secondary);
            border-color: rgba(255, 255, 255, 0.08);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: var(--space-xl);
            transition: all var(--transition);
            backdrop-filter: blur(4px);
        }
        .card:hover {
            background: var(--clr-surface-hover);
            border-color: rgba(212, 168, 83, 0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .card-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin: calc(-1 * var(--space-xl)) calc(-1 * var(--space-xl)) var(--space-lg) calc(-1 * var(--space-xl));
        }
        .card-image img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-image img {
            transform: scale(1.05);
        }
        .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: var(--space-sm);
            color: var(--clr-text);
        }
        .card-text {
            color: var(--clr-text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-top: var(--space-md);
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            color: var(--clr-accent);
            font-weight: 600;
            font-size: 0.95rem;
            margin-top: var(--space-md);
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: var(--space-md);
            color: var(--clr-accent-light);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: var(--space-md) 0;
            transition: all var(--transition);
        }
        .site-header.scrolled {
            background: var(--clr-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--clr-glass-border);
            padding: var(--space-sm) 0;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--space-lg);
            gap: var(--space-lg);
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--clr-text);
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }
        .nav-brand .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--clr-accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-primary);
            font-size: 1.1rem;
        }
        .nav-brand:hover {
            color: var(--clr-accent);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            background: var(--clr-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--clr-glass-border);
            border-radius: var(--radius-full);
            padding: var(--space-xs);
        }
        .nav-links a {
            padding: 8px 22px;
            border-radius: var(--radius-full);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--clr-text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--clr-text);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--clr-primary);
            background: var(--clr-accent);
            font-weight: 600;
        }
        .nav-links a.active:hover {
            color: var(--clr-primary);
            background: var(--clr-accent-light);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            flex-shrink: 0;
        }
        .nav-search-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-secondary);
            font-size: 1.1rem;
            transition: all var(--transition);
            background: transparent;
        }
        .nav-search-btn:hover {
            background: var(--clr-surface);
            color: var(--clr-accent);
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--clr-text);
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
        }
        .nav-toggle:hover {
            background: var(--clr-surface-hover);
            color: var(--clr-accent);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            padding: var(--space-4xl) var(--space-lg) var(--space-3xl);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 26, 0.85) 0%, rgba(11, 14, 26, 0.5) 50%, rgba(11, 14, 26, 0.8) 100%);
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 83, 0.06) 0%, transparent 70%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            padding: 6px 20px;
            border-radius: var(--radius-full);
            font-size: 0.85rem;
            font-weight: 500;
            background: rgba(212, 168, 83, 0.1);
            border: 1px solid rgba(212, 168, 83, 0.15);
            color: var(--clr-accent);
            margin-bottom: var(--space-lg);
            backdrop-filter: blur(8px);
        }
        .hero-title {
            font-size: clamp(2.5rem, 6vw, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: var(--space-lg);
            letter-spacing: -0.02em;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: var(--clr-text-secondary);
            max-width: 600px;
            margin: 0 auto var(--space-2xl);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            justify-content: center;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-2xl) var(--space-3xl);
            justify-content: center;
            margin-top: var(--space-3xl);
            padding-top: var(--space-2xl);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--clr-accent);
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--clr-text-muted);
            margin-top: var(--space-xs);
        }
        .scroll-indicator {
            position: absolute;
            bottom: var(--space-2xl);
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--space-sm);
            color: var(--clr-text-muted);
            font-size: 0.8rem;
            animation: float 2s ease-in-out infinite;
        }
        .scroll-indicator .fa-solid {
            font-size: 1.2rem;
        }
        @keyframes float {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--space-4xl) 0;
        }
        .section-alt {
            background: var(--clr-primary-light);
        }
        .section-dark {
            background: rgba(0, 0, 0, 0.2);
        }

        /* ===== 关于板块 ===== */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-3xl);
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-lg);
        }
        .about-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .about-content .section-title {
            text-align: left;
        }
        .about-content p {
            color: var(--clr-text-secondary);
            margin-bottom: var(--space-md);
            font-size: 1.05rem;
        }
        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }
        .about-feature {
            display: flex;
            align-items: flex-start;
            gap: var(--space-md);
            padding: var(--space-md);
            background: var(--clr-surface);
            border-radius: var(--radius-sm);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .about-feature:hover {
            background: var(--clr-surface-hover);
            border-color: rgba(212, 168, 83, 0.25);
        }
        .about-feature-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            background: rgba(212, 168, 83, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-accent);
            font-size: 1.1rem;
        }
        .about-feature-text h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--clr-text);
            margin-bottom: var(--space-xs);
        }
        .about-feature-text p {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-bottom: 0;
        }

        /* ===== 亮点卡片网格 ===== */
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }
        .highlight-card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: var(--space-xl);
            text-align: center;
            transition: all var(--transition);
        }
        .highlight-card:hover {
            background: var(--clr-surface-hover);
            border-color: rgba(212, 168, 83, 0.3);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .highlight-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            margin: 0 auto var(--space-lg);
            background: rgba(212, 168, 83, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--clr-accent);
            transition: all var(--transition);
        }
        .highlight-card:hover .highlight-icon {
            background: rgba(212, 168, 83, 0.15);
            transform: scale(1.1);
        }
        .highlight-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: var(--space-sm);
        }
        .highlight-card p {
            color: var(--clr-text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* ===== 资讯列表 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-xl);
        }
        .news-card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            background: var(--clr-surface-hover);
            border-color: rgba(212, 168, 83, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .news-card-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .news-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-card-image img {
            transform: scale(1.05);
        }
        .news-card-body {
            padding: var(--space-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body .badge {
            align-self: flex-start;
            margin-bottom: var(--space-sm);
        }
        .news-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: var(--space-sm);
            line-height: 1.4;
        }
        .news-card-body p {
            color: var(--clr-text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
            margin-bottom: var(--space-md);
        }
        .news-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            border-top: 1px solid var(--clr-border);
            padding-top: var(--space-md);
            margin-top: auto;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--space-3xl);
            color: var(--clr-text-muted);
            background: var(--clr-surface);
            border-radius: var(--radius-md);
            border: 1px dashed var(--clr-border);
        }
        .news-empty .fa-solid {
            font-size: 2.5rem;
            color: var(--clr-accent);
            margin-bottom: var(--space-md);
            opacity: 0.5;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
            text-align: center;
        }
        .stat-item {
            padding: var(--space-xl) var(--space-lg);
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: var(--clr-surface-hover);
            border-color: rgba(212, 168, 83, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--clr-accent);
            line-height: 1.2;
            margin-bottom: var(--space-xs);
        }
        .stat-number .suffix {
            font-size: 1.5rem;
            font-weight: 600;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--clr-text-secondary);
        }

        /* ===== 分类入口（观测指南） ===== */
        .category-showcase {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-2xl);
            align-items: center;
        }
        .category-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .category-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .category-image .image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: var(--space-lg);
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
            color: var(--clr-text);
        }
        .category-image .image-overlay .badge {
            background: var(--clr-accent);
            color: var(--clr-primary);
            border: none;
        }
        .category-info h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: var(--space-md);
        }
        .category-info p {
            color: var(--clr-text-secondary);
            font-size: 1.05rem;
            line-height: 1.7;
            margin-bottom: var(--space-lg);
        }
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            margin-bottom: var(--space-lg);
        }
        .category-tags .badge {
            padding: 6px 18px;
            font-size: 0.85rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .faq-item {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 83, 0.2);
        }
        .faq-item.active {
            border-color: rgba(212, 168, 83, 0.3);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-lg) var(--space-xl);
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--clr-text);
            text-align: left;
            background: none;
            transition: all var(--transition);
            gap: var(--space-md);
        }
        .faq-question:hover {
            color: var(--clr-accent);
            background: rgba(212, 168, 83, 0.02);
        }
        .faq-question .fa-solid {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .fa-solid {
            transform: rotate(180deg);
            color: var(--clr-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 var(--space-xl);
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 var(--space-xl) var(--space-xl);
        }
        .faq-answer p {
            color: var(--clr-text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(212, 168, 83, 0.04), rgba(212, 168, 83, 0.01));
            border-top: 1px solid var(--clr-border);
            border-bottom: 1px solid var(--clr-border);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(212, 168, 83, 0.04), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-content {
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }
        .cta-content h2 {
            font-size: 2.25rem;
            font-weight: 700;
            margin-bottom: var(--space-md);
        }
        .cta-content p {
            color: var(--clr-text-secondary);
            font-size: 1.1rem;
            margin-bottom: var(--space-xl);
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-md);
            justify-content: center;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--clr-primary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: var(--space-3xl) 0 var(--space-xl);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand .nav-brand {
            margin-bottom: var(--space-md);
        }
        .footer-brand p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: var(--space-lg);
        }
        .footer-col ul li {
            margin-bottom: var(--space-sm);
        }
        .footer-col ul li a {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--clr-accent);
            padding-left: 4px;
        }
        .footer-social {
            display: flex;
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-muted);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--clr-accent);
            color: var(--clr-primary);
            border-color: var(--clr-accent);
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: var(--space-xl);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: var(--space-md);
            font-size: 0.85rem;
            color: var(--clr-text-muted);
        }
        .footer-bottom a {
            color: var(--clr-text-muted);
        }
        .footer-bottom a:hover {
            color: var(--clr-accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .about-grid {
                grid-template-columns: 1fr;
                gap: var(--space-2xl);
            }
            .about-image img {
                height: 300px;
            }
            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-lg);
            }
            .category-showcase {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }
            .category-image img {
                height: 300px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-xl);
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section {
                padding: var(--space-3xl) 0;
            }
            .hero-title {
                font-size: clamp(2rem, 5vw, 3.2rem);
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(var(--nav-height) + var(--space-sm));
                left: var(--space-md);
                right: var(--space-md);
                background: var(--clr-glass);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                border: 1px solid var(--clr-glass-border);
                border-radius: var(--radius-md);
                padding: var(--space-md);
                flex-direction: column;
                gap: var(--space-xs);
                box-shadow: var(--shadow-lg);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 20px;
                width: 100%;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-toggle {
                display: flex;
            }
            .hero {
                min-height: 90vh;
                padding: var(--space-3xl) var(--space-md) var(--space-2xl);
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: var(--space-lg) var(--space-2xl);
            }
            .hero-stat-value {
                font-size: 1.5rem;
            }
            .highlights-grid {
                grid-template-columns: 1fr;
            }
            .about-features {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-md);
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .category-showcase {
                grid-template-columns: 1fr;
            }
            .category-image img {
                height: 240px;
            }
            .category-info h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .btn-lg {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .container {
                padding: 0 var(--space-md);
            }
            .news-card-image {
                height: 180px;
            }
            .faq-question {
                padding: var(--space-md) var(--space-lg);
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 var(--space-lg);
            }
            .faq-item.active .faq-answer {
                padding: 0 var(--space-lg) var(--space-lg);
            }
            .scroll-indicator {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-sm);
            }
            .stat-item {
                padding: var(--space-md);
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .stat-label {
                font-size: 0.8rem;
            }
            .highlights-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: var(--space-2xl) 0;
            }
            .nav-brand {
                font-size: 1.1rem;
            }
            .nav-brand .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .about-image img {
                height: 220px;
            }
            .category-image img {
                height: 200px;
            }
            .cta-content h2 {
                font-size: 1.4rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1b4a;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg-dark: #0a0e1a;
            --bg-mid: #111827;
            --bg-card: #1a2236;
            --bg-light: #f8fafc;
            --text-white: #f1f5f9;
            --text-light: #cbd5e1;
            --text-muted: #94a3b8;
            --text-dark: #1e293b;
            --border-dark: rgba(255, 255, 255, 0.08);
            --border-light: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-white);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(10, 14, 26, 0.75);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border-dark);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 14, 26, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }
        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .nav-brand:hover {
            color: var(--accent);
        }
        .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            border-radius: 50%;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            box-shadow: 0 4px 16px rgba(26, 42, 108, 0.4);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-search-btn,
        .nav-toggle {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 18px;
            transition: all var(--transition);
            background: transparent;
        }
        .nav-search-btn:hover,
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-white);
        }
        .nav-toggle {
            display: none;
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            padding: calc(var(--header-height) + 40px) 0 60px;
            position: relative;
            background: var(--bg-dark);
            min-height: 420px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.35;
            mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent 80%);
            -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.6), transparent 80%);
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #fff, var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 20px;
            color: var(--text-light);
            max-width: 720px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 20px;
        }
        .hero-tags span {
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-light);
            border: 1px solid var(--border-dark);
            backdrop-filter: blur(4px);
        }
        .hero-tags span i {
            margin-right: 6px;
            color: var(--accent);
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .section-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent);
            margin-bottom: 12px;
        }
        .section-bg-mid {
            background: var(--bg-mid);
        }
        .section-bg-card {
            background: var(--bg-card);
        }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(245, 158, 11, 0.2);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px;
        }
        .card-body h3 {
            font-size: 20px;
            margin-bottom: 10px;
            color: var(--text-white);
        }
        .card-body p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .card-body .card-meta i {
            margin-right: 4px;
            color: var(--accent);
        }
        .card-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(245, 158, 11, 0.12);
            color: var(--accent);
            margin-bottom: 12px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 15px;
            color: var(--accent);
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 12px;
            color: var(--accent-light);
        }

        /* ===== Badge ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            border: 1px solid var(--border-dark);
        }
        .badge-accent {
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent);
            border-color: rgba(245, 158, 11, 0.25);
        }
        .badge-primary {
            background: rgba(26, 42, 108, 0.3);
            color: var(--text-white);
            border-color: rgba(26, 42, 108, 0.3);
        }

        /* ===== Stat / Number Block ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
        }
        .stat-item:hover {
            border-color: rgba(245, 158, 11, 0.2);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* ===== Timeline / List ===== */
        .timeline {
            position: relative;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent), transparent);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding: 20px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-dark);
            transition: all var(--transition);
        }
        .timeline-item:hover {
            border-color: rgba(245, 158, 11, 0.2);
            box-shadow: var(--shadow-sm);
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -32px;
            top: 28px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid var(--bg-dark);
            box-shadow: 0 0 0 2px var(--accent);
        }
        .timeline-item .tl-date {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 4px;
            letter-spacing: 0.5px;
        }
        .timeline-item h4 {
            font-size: 18px;
            margin-bottom: 6px;
            color: var(--text-white);
        }
        .timeline-item p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== 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-md);
            border: 1px solid var(--border-dark);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(245, 158, 11, 0.15);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-white);
            background: transparent;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }
        .faq-question i {
            font-size: 16px;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 80px 0;
            position: relative;
            background: var(--bg-mid);
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.4);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-light);
            border: 1px solid var(--border-dark);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(245, 158, 11, 0.06);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-dark);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 15px;
            color: var(--text-muted);
            margin-top: 14px;
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            font-size: 18px;
            transition: all var(--transition);
            border: 1px solid var(--border-dark);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.3);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid var(--border-dark);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 820px) {
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                border-bottom: 1px solid var(--border-dark);
                pointer-events: none;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 14px 20px;
                font-size: 17px;
                border-radius: var(--radius-sm);
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero p {
                font-size: 17px;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .grid-3,
            .grid-2 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .timeline {
                padding-left: 28px;
            }
            .timeline-item::before {
                left: -22px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                padding: 0 16px;
            }
            .nav-brand {
                font-size: 18px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }
            .category-hero {
                padding: calc(var(--header-height) + 24px) 0 40px;
                min-height: 320px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .hero-tags span {
                font-size: 12px;
                padding: 4px 12px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header p {
                font-size: 15px;
            }
            .card-body {
                padding: 16px;
            }
            .card-body h3 {
                font-size: 17px;
            }
            .stat-number {
                font-size: 32px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .btn {
                padding: 12px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .btn-group {
                flex-direction: column;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer p {
                font-size: 14px;
            }
            .timeline-item {
                padding: 16px 18px;
            }
            .timeline-item h4 {
                font-size: 16px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 15px;
            }
            .footer-grid {
                gap: 24px;
            }
            .footer-col h4 {
                font-size: 15px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-dark);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== Focus ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Back to top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            z-index: 999;
            border: none;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.4);
            color: #fff;
        }

        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }

        /* ===== Image overlay ===== */
        .img-overlay {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-md);
        }
        .img-overlay img {
            transition: transform 0.6s ease;
        }
        .img-overlay:hover img {
            transform: scale(1.05);
        }
        .img-overlay::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent 60%);
            pointer-events: none;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a5e;
            --primary-light: #2c4a8c;
            --primary-dark: #0f1a3a;
            --accent: #f5a623;
            --accent-light: #f7c55a;
            --accent-dark: #d48e1a;
            --bg-body: #f8f9fc;
            --bg-white: #ffffff;
            --bg-dark: #0d152e;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8888a0;
            --text-white: #f0f0f8;
            --border-color: #e2e6ef;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 94, 0.06);
            --shadow-md: 0 6px 24px rgba(26, 42, 94, 0.1);
            --shadow-lg: 0 16px 48px rgba(26, 42, 94, 0.14);
            --shadow-xl: 0 24px 64px rgba(26, 42, 94, 0.18);
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 16px;
            --spacing-lg: 24px;
            --spacing-xl: 40px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.3s 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-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
        button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        input, textarea { font-family: inherit; font-size: 1rem; border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 10px 16px; transition: var(--transition); background: var(--bg-white); }
        input:focus, textarea:focus { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(26, 42, 94, 0.1); outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 860px; margin: 0 auto; padding: 0 24px; }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 230, 239, 0.6);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); background: rgba(255, 255, 255, 0.96); }
        .nav-inner {
            max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; gap: var(--spacing-lg);
        }
        .nav-brand {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.4rem; font-weight: 700; color: var(--primary); white-space: nowrap;
            transition: var(--transition);
        }
        .nav-brand:hover { color: var(--accent); transform: scale(1.02); }
        .brand-icon { font-size: 1.5rem; color: var(--accent); }
        .nav-links { display: flex; align-items: center; gap: var(--spacing-xs); }
        .nav-links a {
            padding: 8px 18px; border-radius: 50px; font-size: 0.95rem;
            font-weight: 500; color: var(--text-secondary); transition: var(--transition);
            position: relative; white-space: nowrap;
        }
        .nav-links a:hover { color: var(--primary); background: rgba(26, 42, 94, 0.06); }
        .nav-links a.active {
            color: var(--bg-white); background: var(--primary);
            box-shadow: 0 4px 14px rgba(26, 42, 94, 0.25);
        }
        .nav-links a.active:hover { background: var(--primary-light); color: var(--bg-white); }
        .nav-actions { display: flex; align-items: center; gap: var(--spacing-sm); }
        .nav-search-btn {
            width: 40px; height: 40px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            color: var(--text-secondary); font-size: 1.1rem;
            background: transparent; transition: var(--transition);
        }
        .nav-search-btn:hover { background: rgba(26, 42, 94, 0.06); color: var(--primary); }
        .nav-toggle { display: none; width: 40px; height: 40px; border-radius: 50%; align-items: center; justify-content: center; color: var(--text-primary); font-size: 1.3rem; background: transparent; }
        .nav-toggle:hover { background: rgba(26, 42, 94, 0.06); }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 260px;
            display: flex; align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover; background-position: center;
            opacity: 0.15; mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute; inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(245, 166, 35, 0.12) 0%, transparent 60%);
        }
        .page-banner .container-narrow { position: relative; z-index: 2; text-align: center; }
        .page-banner h1 {
            color: var(--text-white); font-size: 2.2rem; font-weight: 800;
            margin-bottom: 12px; text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .page-banner .article-meta {
            display: flex; justify-content: center; flex-wrap: wrap; gap: var(--spacing-md);
            color: rgba(240, 240, 248, 0.75); font-size: 0.95rem;
        }
        .page-banner .article-meta span { display: flex; align-items: center; gap: 6px; }
        .page-banner .article-meta i { color: var(--accent); }
        .page-banner .category-tag {
            display: inline-block; padding: 4px 16px; border-radius: 50px;
            background: rgba(245, 166, 35, 0.2); color: var(--accent-light);
            font-size: 0.85rem; font-weight: 500; margin-bottom: 16px;
            backdrop-filter: blur(4px); border: 1px solid rgba(245, 166, 35, 0.2);
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: var(--spacing-2xl) 0;
        }
        .article-body {
            background: var(--bg-white); border-radius: var(--radius-lg);
            padding: 48px 40px; box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-body .content {
            font-size: 1.05rem; line-height: 1.9; color: var(--text-secondary);
        }
        .article-body .content h2 { font-size: 1.6rem; margin-top: 40px; margin-bottom: 16px; color: var(--text-primary); }
        .article-body .content h3 { font-size: 1.3rem; margin-top: 32px; margin-bottom: 12px; color: var(--text-primary); }
        .article-body .content p { margin-bottom: 1.2rem; }
        .article-body .content img { border-radius: var(--radius-md); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-body .content ul, .article-body .content ol { margin-bottom: 1.2rem; padding-left: 24px; list-style: disc; color: var(--text-secondary); }
        .article-body .content ol { list-style: decimal; }
        .article-body .content li { margin-bottom: 6px; }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent); background: rgba(245, 166, 35, 0.06);
            padding: 16px 24px; margin: 24px 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary); font-style: italic;
        }
        .article-body .content a { color: var(--accent-dark); text-decoration: underline; }
        .article-body .content a:hover { color: var(--primary); }

        .not-found-box {
            text-align: center; padding: 80px 40px; background: var(--bg-white);
            border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--text-primary); }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
        .not-found-box .btn-back { display: inline-block; padding: 12px 32px; border-radius: 50px; background: var(--primary); color: var(--bg-white); font-weight: 600; }
        .not-found-box .btn-back:hover { background: var(--primary-light); color: var(--bg-white); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Related / Navigation ===== */
        .article-nav-links {
            display: flex; justify-content: space-between; flex-wrap: wrap;
            margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--border-color);
            gap: var(--spacing-md);
        }
        .article-nav-links a {
            display: flex; align-items: center; gap: 8px;
            padding: 10px 20px; border-radius: 50px;
            background: var(--bg-body); border: 1px solid var(--border-color);
            color: var(--text-secondary); font-size: 0.95rem; font-weight: 500;
            transition: var(--transition); max-width: 45%;
        }
        .article-nav-links a:hover { background: var(--primary); color: var(--bg-white); border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
        .article-nav-links a i { font-size: 0.9rem; }

        /* ===== CTA Section ===== */
        .article-cta {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 56px 0; margin-top: var(--spacing-xl);
            border-radius: var(--radius-lg); text-align: center;
            position: relative; overflow: hidden;
        }
        .article-cta::before {
            content: ''; position: absolute; inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover; background-position: center;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .article-cta .container-narrow { position: relative; z-index: 2; }
        .article-cta h3 { color: var(--text-white); font-size: 1.8rem; font-weight: 700; margin-bottom: 12px; }
        .article-cta p { color: rgba(240, 240, 248, 0.75); font-size: 1.1rem; margin-bottom: 28px; }
        .article-cta .btn-cta {
            display: inline-block; padding: 14px 40px; border-radius: 50px;
            background: var(--accent); color: var(--primary-dark); font-weight: 700;
            font-size: 1.05rem; transition: var(--transition);
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.4);
        }
        .article-cta .btn-cta:hover { background: var(--accent-light); transform: translateY(-3px); box-shadow: 0 8px 32px rgba(245, 166, 35, 0.5); color: var(--primary-dark); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(240, 240, 248, 0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand .nav-brand { color: var(--text-white); font-size: 1.3rem; margin-bottom: 12px; display: inline-flex; }
        .footer-brand .nav-brand:hover { color: var(--accent); }
        .footer-brand p { color: rgba(240, 240, 248, 0.6); font-size: 0.9rem; line-height: 1.7; max-width: 320px; margin-bottom: 16px; }
        .footer-social { display: flex; gap: var(--spacing-sm); }
        .footer-social a {
            width: 40px; height: 40px; border-radius: 50%;
            background: rgba(255, 255, 255, 0.06); color: rgba(240, 240, 248, 0.6);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.2rem; transition: var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-2px); }
        .footer-col h4 { color: var(--text-white); font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(240, 240, 248, 0.55); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 0; display: flex; justify-content: space-between;
            flex-wrap: wrap; gap: var(--spacing-sm);
            font-size: 0.85rem; color: rgba(240, 240, 248, 0.4);
        }
        .footer-bottom a { color: rgba(240, 240, 248, 0.45); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .nav-links {
                position: fixed; top: var(--header-height); left: 0; right: 0;
                background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(16px);
                flex-direction: column; padding: 16px 24px; gap: var(--spacing-xs);
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%); opacity: 0; pointer-events: none;
                transition: var(--transition); box-shadow: var(--shadow-lg);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-links a { width: 100%; text-align: center; padding: 12px 18px; }
            .nav-toggle { display: flex; }
            .page-banner { padding: 60px 0 40px; min-height: 200px; }
            .page-banner h1 { font-size: 1.6rem; }
            .article-body { padding: 28px 20px; }
            .article-body .content { font-size: 1rem; }
            .article-nav-links a { max-width: 100%; width: 100%; justify-content: center; }
            .article-cta h3 { font-size: 1.4rem; }
            .article-cta p { font-size: 1rem; }
            .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
            .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
            .nav-inner { padding: 0 16px; }
            .nav-brand { font-size: 1.1rem; }
            .brand-icon { font-size: 1.2rem; }
            .page-banner h1 { font-size: 1.3rem; }
            .page-banner .article-meta { font-size: 0.85rem; gap: var(--spacing-sm); }
            .article-body { padding: 20px 16px; border-radius: var(--radius-md); }
            .article-body .content { font-size: 0.95rem; }
            .article-body .content h2 { font-size: 1.3rem; }
            .article-body .content h3 { font-size: 1.1rem; }
            .article-cta { padding: 40px 0; }
            .article-cta h3 { font-size: 1.2rem; }
            .not-found-box { padding: 40px 20px; }
            .not-found-box h2 { font-size: 1.3rem; }
        }