/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            --bg-primary: #1b1b2f;
            --bg-secondary: #1f1f36;
            --bg-card: #242440;
            --bg-card-hover: #2a2a4a;
            --bg-chip-active: #d4a853;
            --text-primary: #e8e0d0;
            --text-secondary: #b8b0a0;
            --text-muted: #8a8478;
            --text-chip-active: #1b1b2f;
            --accent: #d4a853;
            --accent-hover: #e6bf6b;
            --accent-soft: rgba(212, 168, 83, 0.12);
            --border-default: #3a3550;
            --border-light: #2e2a42;
            --border-accent: #d4a853;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-chip: 24px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
            --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.40);
            --shadow-btn: 0 2px 8px rgba(212, 168, 83, 0.15);
            --shadow-btn-hover: 0 4px 18px rgba(212, 168, 83, 0.30);
            --font-heading: 'Noto Serif SC', 'STSong', 'Songti SC', 'SimSun', 'KaiTi', serif;
            --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
            --max-width: 1200px;
            --nav-height: 68px;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.40s ease;
        }

        /* ============ 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;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 30% 20%, rgba(120, 100, 180, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 65%, rgba(212, 168, 83, 0.04) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 80%, rgba(100, 130, 200, 0.05) 0%, transparent 50%);
            background-attachment: fixed;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        button {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            background: none;
            font-size: inherit;
            color: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: var(--font-body);
            font-size: inherit;
            color: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            font-weight: 600;
            line-height: 1.35;
            color: var(--text-primary);
        }

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

        /* ============ Header & Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(27, 27, 47, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-normal), border-color var(--transition-normal);
        }
        .site-header.scrolled {
            background: rgba(27, 27, 47, 0.96);
            border-bottom-color: var(--border-default);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.30);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
            height: 100%;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .logo-link:hover {
            color: var(--accent);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--accent-soft);
            border: 1.5px solid var(--border-accent);
            font-size: 1.1rem;
            color: var(--accent);
            flex-shrink: 0;
        }

        /* Chip导航 */
        .nav-chips {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-chip);
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            color: var(--text-secondary);
            border: 1.5px solid var(--border-default);
            background: transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
            text-decoration: none;
            font-family: var(--font-body);
            line-height: 1.3;
        }
        .nav-chip:hover {
            border-color: var(--accent);
            color: var(--accent-hover);
            background: var(--accent-soft);
        }
        .nav-chip.active {
            background: var(--bg-chip-active);
            color: var(--text-chip-active);
            border-color: var(--bg-chip-active);
            font-weight: 600;
            box-shadow: var(--shadow-btn);
        }
        .nav-chip.active:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--text-chip-active);
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
            z-index: 110;
            background: none;
            border: none;
        }
        .mobile-menu-btn span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 1px;
            transition: all var(--transition-fast);
        }
        .mobile-menu-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-menu-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ Hero ============ */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            background-attachment: fixed;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg,
                    rgba(27, 27, 47, 0.55) 0%,
                    rgba(27, 27, 47, 0.75) 40%,
                    rgba(27, 27, 47, 0.90) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(circle at 25% 30%, rgba(212, 168, 83, 0.08) 0%, transparent 45%),
                radial-gradient(circle at 70% 55%, rgba(160, 140, 200, 0.06) 0%, transparent 40%);
            z-index: 2;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 700px;
            padding: var(--spacing-3xl) var(--spacing-lg);
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: var(--radius-chip);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent);
            border: 1.5px double var(--border-accent);
            background: var(--accent-soft);
            margin-bottom: var(--spacing-md);
        }
        .hero-title {
            font-family: var(--font-heading);
            font-size: 3rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: #f5efe0;
            margin-bottom: var(--spacing-md);
            line-height: 1.25;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
        }
        .hero-title .accent-dot {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-lg);
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-xl);
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            transition: all var(--transition-normal);
            cursor: pointer;
            text-decoration: none;
            font-family: var(--font-body);
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--text-chip-active);
            border: 2px solid var(--accent);
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px);
            color: var(--text-chip-active);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 2px solid var(--border-default);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent-hover);
            background: var(--accent-soft);
            transform: translateY(-2px);
        }
        .btn:active {
            transform: translateY(0);
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: var(--spacing-3xl) 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: var(--spacing-xs);
            border-bottom: 2px solid var(--border-accent);
            padding-bottom: 4px;
        }
        .section-title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.03em;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* ============ 简介板块 ============ */
        .intro-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .intro-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 2px solid var(--border-default);
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
        }
        .intro-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .intro-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 3px double var(--border-accent);
            border-radius: var(--radius-lg);
            opacity: 0.5;
            pointer-events: none;
        }
        .intro-text h3 {
            font-size: 1.5rem;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.03em;
        }
        .intro-text p {
            color: var(--text-secondary);
            margin-bottom: var(--spacing-md);
            line-height: 1.8;
        }
        .intro-features {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
            margin-top: var(--spacing-md);
        }
        .intro-feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 14px;
            border-radius: var(--radius-chip);
            font-size: 0.82rem;
            color: var(--text-secondary);
            border: 1px solid var(--border-default);
            background: var(--bg-card);
            font-family: var(--font-body);
        }
        .intro-feature-tag .tag-icon {
            color: var(--accent);
            font-size: 0.75rem;
        }

        /* ============ 分类入口板块 ============ */
        .category-section {
            background: var(--bg-primary);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--spacing-lg);
            max-width: 900px;
            margin: 0 auto;
        }
        .category-card {
            display: block;
            text-decoration: none;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 2px solid var(--border-default);
            background: var(--bg-card);
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .category-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .category-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .category-card-body {
            padding: var(--spacing-md);
        }
        .category-card-body h4 {
            font-size: 1.2rem;
            margin-bottom: 6px;
            letter-spacing: 0.03em;
            color: var(--text-primary);
        }
        .category-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .category-card .card-arrow {
            position: absolute;
            bottom: var(--spacing-md);
            right: var(--spacing-md);
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent-soft);
            border: 1.5px solid var(--border-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .category-card:hover .card-arrow {
            background: var(--accent);
            color: var(--text-chip-active);
        }

        /* ============ 最新发布板块 ============ */
        .latest-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .latest-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: var(--spacing-lg);
        }
        .latest-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1.5px solid var(--border-default);
            overflow: hidden;
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .latest-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .latest-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .latest-card-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .latest-card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .latest-card-cat {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-chip);
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent);
            border: 1px solid var(--border-accent);
            background: var(--accent-soft);
        }
        .latest-card-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.5;
            font-family: var(--font-heading);
            letter-spacing: 0.02em;
        }
        .latest-card-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }
        .latest-card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: var(--spacing-sm);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .latest-card-link:hover {
            color: var(--accent-hover);
        }
        .latest-empty {
            text-align: center;
            padding: var(--spacing-xl);
            color: var(--text-muted);
            font-size: 1rem;
            grid-column: 1 / -1;
            border: 1.5px dashed var(--border-default);
            border-radius: var(--radius-lg);
            background: var(--bg-card);
        }

        /* ============ 功能特色板块 ============ */
        .features-section {
            background: var(--bg-primary);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: var(--spacing-lg);
        }
        .feature-card {
            text-align: center;
            padding: var(--spacing-lg) var(--spacing-md);
            border-radius: var(--radius-lg);
            background: var(--bg-card);
            border: 1.5px solid var(--border-default);
            transition: all var(--transition-normal);
            box-shadow: var(--shadow-card);
        }
        .feature-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent-soft);
            border: 2px double var(--border-accent);
            font-size: 1.4rem;
            color: var(--accent);
            margin-bottom: var(--spacing-md);
        }
        .feature-card h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }
        .feature-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ============ 数据统计板块 ============ */
        .stats-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: var(--spacing-lg);
            text-align: center;
        }
        .stat-item {
            padding: var(--spacing-md);
        }
        .stat-number {
            font-family: var(--font-heading);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.04em;
            line-height: 1.1;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
            letter-spacing: 0.04em;
        }
        .stat-divider {
            width: 40px;
            height: 2px;
            background: var(--border-accent);
            margin: 8px auto;
            opacity: 0.6;
        }

        /* ============ FAQ板块 ============ */
        .faq-section {
            background: var(--bg-primary);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            border: 1.5px solid var(--border-default);
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: var(--spacing-md);
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            cursor: pointer;
            background: none;
            border: none;
            font-family: var(--font-body);
            line-height: 1.5;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            border: 1.5px solid var(--border-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--accent);
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
            color: var(--text-chip-active);
            border-color: var(--accent);
        }
        .faq-answer {
            padding: 0 var(--spacing-md) var(--spacing-md);
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ============ CTA板块 ============ */
        .cta-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            text-align: center;
        }
        .cta-inner {
            max-width: 600px;
            margin: 0 auto;
            padding: var(--spacing-xl) 0;
        }
        .cta-inner h3 {
            font-size: 1.6rem;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.04em;
        }
        .cta-inner p {
            color: var(--text-muted);
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-light);
            padding: var(--spacing-xl) 0;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-lg);
            justify-content: space-between;
            align-items: flex-start;
        }
        .footer-brand {
            max-width: 280px;
        }
        .footer-brand .logo-link {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-sm);
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-links {
            display: flex;
            gap: var(--spacing-xl);
            flex-wrap: wrap;
        }
        .footer-link-group h5 {
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-sm);
            font-family: var(--font-body);
        }
        .footer-link-group a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 6px;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-link-group a:hover {
            color: var(--accent-hover);
        }
        .footer-bottom {
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-light);
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }
        .footer-bottom a {
            color: var(--accent);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--accent-hover);
        }

        /* ============ 装饰分隔线 ============ */
        .ornament-divider {
            text-align: center;
            color: var(--border-accent);
            font-size: 0.7rem;
            letter-spacing: 0.3em;
            opacity: 0.6;
            padding: var(--spacing-sm) 0;
            user-select: none;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            :root {
                --spacing-3xl: 60px;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .intro-image-wrap {
                max-width: 500px;
                margin: 0 auto;
            }
            .latest-list {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 58px;
                --spacing-3xl: 48px;
                --spacing-2xl: 40px;
            }
            .container {
                padding: 0 var(--spacing-md);
            }
            .header-inner {
                padding: 0 var(--spacing-md);
            }
            .nav-chips {
                display: none;
            }
            .nav-chips.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(27, 27, 47, 0.97);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                padding: var(--spacing-md);
                gap: 6px;
                border-bottom: 1px solid var(--border-default);
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
                z-index: 99;
            }
            .nav-chips.mobile-open .nav-chip {
                width: 100%;
                text-align: center;
                justify-content: center;
                padding: 10px 18px;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .hero {
                min-height: 420px;
                background-attachment: scroll;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
                max-width: 400px;
            }
            .latest-list {
                grid-template-columns: 1fr;
                max-width: 450px;
                margin: 0 auto;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-inner {
                flex-direction: column;
                gap: var(--spacing-md);
            }
            .footer-links {
                gap: var(--spacing-md);
            }
            .intro-text h3 {
                font-size: 1.3rem;
            }
            .cta-inner h3 {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-desc {
                font-size: 0.9rem;
            }
            .hero {
                min-height: 360px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
            .latest-card-img {
                height: 150px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #1b1e25;
            --bg-secondary: #232730;
            --bg-tertiary: #2a2f3a;
            --bg-card: #252932;
            --bg-card-hover: #2c313c;
            --text-primary: #e6ddd0;
            --text-secondary: #b8af9f;
            --text-muted: #8a8275;
            --accent: #c9a050;
            --accent-hover: #dbb560;
            --accent-soft: rgba(201, 160, 80, 0.12);
            --accent-glow: rgba(201, 160, 80, 0.25);
            --border: #3c3832;
            --border-light: #4a4540;
            --border-accent: #5a4a30;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.35);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
            --radius-sm: 4px;
            --radius: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --font-heading: 'Georgia', 'Palatino Linotype', 'Book Antiqua', 'STSong', 'Noto Serif SC', 'Source Han Serif SC', serif;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1100px;
            --max-width-article: 780px;
            --nav-height: 64px;
        }

        *,
        *::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-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 20% 5%, rgba(201, 160, 80, 0.03) 0%, transparent 55%),
                radial-gradient(ellipse at 75% 20%, rgba(180, 140, 70, 0.02) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 80%, rgba(160, 120, 60, 0.025) 0%, transparent 60%);
            min-height: 100vh;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition), opacity var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        button {
            cursor: pointer;
            font-family: var(--font-body);
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        input {
            font-family: var(--font-body);
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container--narrow {
            max-width: var(--max-width-article);
        }

        /* ===== HEADER & NAV ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(27, 30, 37, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 0 rgba(255,255,255,0.02), var(--shadow-sm);
            transition: background var(--transition), border-color var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 20px;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 9px;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            text-decoration: none;
            white-space: nowrap;
            transition: color var(--transition), opacity var(--transition);
        }
        .logo-link:hover {
            color: var(--accent);
            opacity: 1;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
            transition: background var(--transition), transform var(--transition);
        }
        .logo-link:hover .logo-icon {
            background: var(--accent-glow);
            transform: rotate(-8deg) scale(1.06);
        }

        /* Chip Navigation */
        .nav-chips {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 4px 0;
        }
        .nav-chips::-webkit-scrollbar {
            display: none;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1.5px solid var(--border);
            white-space: nowrap;
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.02em;
            position: relative;
        }
        .nav-chip:hover {
            color: var(--text-primary);
            border-color: var(--border-accent);
            background: var(--bg-tertiary);
            box-shadow: 0 0 0 4px var(--accent-soft);
        }
        .nav-chip.active {
            color: #f5efe0;
            background: var(--accent);
            border-color: var(--accent);
            font-weight: 600;
            box-shadow: 0 2px 12px var(--accent-glow);
        }
        .nav-chip.active:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #faf6ef;
        }

        /* Mobile nav toggle */
        .nav-mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius);
            border: 1.5px solid var(--border);
            color: var(--text-primary);
            font-size: 1.3rem;
            background: var(--bg-secondary);
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .nav-mobile-toggle:hover {
            border-color: var(--border-accent);
            background: var(--bg-tertiary);
        }
        .nav-mobile-toggle.is-open {
            border-color: var(--accent);
            background: var(--accent-soft);
        }

        /* ===== BREADCRUMB ===== */
        .breadcrumb-section {
            padding: 20px 0 8px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .separator {
            color: var(--border-light);
            user-select: none;
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
            max-width: 340px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== ARTICLE HERO ===== */
        .article-hero {
            padding: 12px 0 28px;
        }
        .article-featured-image {
            width: 100%;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            margin-bottom: 28px;
            aspect-ratio: 21 / 9;
            object-fit: cover;
            background: var(--bg-tertiary);
        }
        .article-featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid var(--border-accent);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            text-decoration: none;
        }
        .article-category-tag:hover {
            background: var(--accent-glow);
            color: var(--accent-hover);
            border-color: var(--accent);
        }
        .article-title {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 28px;
        }
        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta-icon {
            font-size: 0.95rem;
            opacity: 0.7;
        }

        /* ===== ARTICLE CONTENT ===== */
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 1.6rem;
            color: var(--text-primary);
            margin: 36px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--border-accent);
            letter-spacing: 0.02em;
        }
        .article-body h3 {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            color: var(--text-primary);
            margin: 28px 0 12px;
        }
        .article-body p {
            margin-bottom: 16px;
            color: var(--text-secondary);
        }
        .article-body strong {
            color: var(--text-primary);
            font-weight: 600;
        }
        .article-body blockquote {
            border-left: 3px solid var(--accent);
            padding: 16px 20px;
            margin: 24px 0;
            background: var(--accent-soft);
            border-radius: 0 var(--radius) var(--radius) 0;
            color: var(--text-secondary);
            font-style: italic;
            letter-spacing: 0.01em;
        }
        .article-body ul,
        .article-body ol {
            margin: 16px 0;
            padding-left: 24px;
            color: var(--text-secondary);
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 20px 0;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
            text-decoration-color: var(--border-accent);
            transition: all var(--transition);
        }
        .article-body a:hover {
            text-decoration-color: var(--accent);
            color: var(--accent-hover);
        }
        .article-body code {
            font-family: var(--font-mono);
            background: var(--bg-tertiary);
            padding: 3px 8px;
            border-radius: var(--radius-sm);
            font-size: 0.9em;
            color: var(--accent);
            border: 1px solid var(--border);
        }
        .article-body pre {
            background: var(--bg-tertiary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== NOT FOUND STATE ===== */
        .not-found-card {
            text-align: center;
            padding: 60px 32px;
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .not-found-icon {
            font-size: 3.5rem;
            margin-bottom: 16px;
            opacity: 0.6;
        }
        .not-found-card h2 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 0.95rem;
        }

        /* ===== RELATED POSTS ===== */
        .related-section {
            padding: 48px 0 40px;
            margin-top: 20px;
            border-top: 1px solid var(--border);
        }
        .related-heading {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 24px;
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-heading::before {
            content: '';
            display: inline-block;
            width: 4px;
            height: 24px;
            background: var(--accent);
            border-radius: 2px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            text-decoration: none;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .related-card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            background: var(--bg-tertiary);
            border-bottom: 1px solid var(--border);
        }
        .related-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .related-card-title {
            font-family: var(--font-heading);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .related-card:hover .related-card-title {
            color: var(--accent);
        }
        .related-card-excerpt {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .related-empty {
            grid-column: 1 / -1;
            text-align: center;
            color: var(--text-muted);
            padding: 32px;
            font-size: 0.9rem;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            padding: 44px 0;
            margin: 20px 0 0;
            background: var(--bg-secondary);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .cta-section h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .cta-section p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        /* ===== BUTTONS ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 11px 24px;
            border-radius: 24px;
            font-size: 0.95rem;
            font-weight: 600;
            text-decoration: none;
            letter-spacing: 0.03em;
            transition: all var(--transition);
            border: 1.5px solid transparent;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: #1b1e25;
            border-color: var(--accent);
            box-shadow: 0 2px 14px var(--accent-glow);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            box-shadow: 0 4px 20px rgba(201, 160, 80, 0.4);
            transform: translateY(-1px);
            color: #1b1e25;
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border-color: var(--border);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            background: var(--accent-soft);
            color: var(--accent);
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 0.82rem;
            border-radius: 20px;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 44px 0 24px;
            margin-top: 0;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 40px;
            margin-bottom: 28px;
        }
        .footer-brand .logo-link {
            margin-bottom: 10px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
            max-width: 360px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .footer-link-group h5 {
            font-family: var(--font-heading);
            font-size: 0.9rem;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.04em;
            font-weight: 700;
        }
        .footer-link-group a {
            display: block;
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 8px;
            text-decoration: none;
            transition: color var(--transition);
        }
        .footer-link-group a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-title {
                font-size: 1.85rem;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
            .header-inner {
                height: 56px;
                gap: 12px;
            }
            .logo-link {
                font-size: 1.15rem;
                gap: 6px;
            }
            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 0.95rem;
            }
            .nav-chips {
                gap: 6px;
            }
            .nav-chip {
                padding: 6px 13px;
                font-size: 0.8rem;
            }
            .nav-mobile-toggle {
                display: flex;
            }
            .nav-chips-wrapper {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(27, 30, 37, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border);
                padding: 12px 18px;
                display: none;
                flex-direction: column;
                gap: 6px;
                z-index: 99;
                box-shadow: var(--shadow-lg);
            }
            .nav-chips-wrapper.is-open {
                display: flex;
            }
            .nav-chips-wrapper .nav-chip {
                width: 100%;
                justify-content: center;
                border-radius: var(--radius);
                padding: 10px 16px;
                font-size: 0.9rem;
            }

            .article-title {
                font-size: 1.55rem;
            }
            .article-featured-image {
                aspect-ratio: 16 / 9;
                border-radius: var(--radius);
            }
            .article-body {
                font-size: 0.98rem;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-links {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-brand p {
                max-width: 100%;
            }

            .cta-section {
                padding: 32px 18px;
            }
            .cta-section h3 {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .logo-link {
                font-size: 1.05rem;
            }
            .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 0.85rem;
            }
            .article-title {
                font-size: 1.3rem;
            }
            .article-featured-image {
                aspect-ratio: 4 / 3;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .related-heading {
                font-size: 1.25rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .footer-links {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .not-found-card {
                padding: 40px 20px;
            }
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --bg-primary: #1c1e24;
            --bg-secondary: #22252d;
            --bg-card: #282c36;
            --bg-card-hover: #2e3340;
            --bg-overlay: rgba(18, 20, 26, 0.75);
            --text-primary: #e6ddd0;
            --text-secondary: #b5ada0;
            --text-muted: #8a8478;
            --accent: #c49162;
            --accent-light: #dbb58d;
            --accent-dark: #a67648;
            --accent-glow: rgba(196, 145, 98, 0.25);
            --border: #3a3832;
            --border-light: #4a4640;
            --border-accent: #8b7355;
            --radius-sm: 4px;
            --radius: 8px;
            --radius-lg: 14px;
            --radius-chip: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 8px 36px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--border-accent);
            --shadow-nav: 0 2px 16px rgba(0, 0, 0, 0.4);
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Georgia', 'Noto Serif SC', 'STSong', 'Songti SC', 'SimSun', serif;
            --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --container-max: 1180px;
            --container-narrow: 860px;
            --spacing-xs: 6px;
            --spacing-sm: 12px;
            --spacing-md: 20px;
            --spacing-lg: 32px;
            --spacing-xl: 48px;
            --spacing-2xl: 64px;
            --spacing-3xl: 80px;
        }

        /* ========== 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-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image:
                radial-gradient(ellipse at 30% 15%, rgba(196, 145, 98, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 60%, rgba(219, 181, 141, 0.03) 0%, transparent 55%),
                radial-gradient(ellipse at 50% 85%, rgba(139, 115, 85, 0.03) 0%, transparent 50%);
            min-height: 100vh;
        }

        a {
            color: var(--accent-light);
            text-decoration: none;
            transition: color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            color: var(--accent);
            opacity: 0.9;
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

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

        ul,
        ol {
            list-style: none;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 600;
            line-height: 1.35;
            color: var(--text-primary);
        }

        /* ========== Container ========== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--spacing-md);
            padding-right: var(--spacing-md);
        }
        .container--narrow {
            max-width: var(--container-narrow);
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(28, 30, 36, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            padding: 0 var(--spacing-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: var(--spacing-sm) 0;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: color var(--transition-fast);
        }
        .logo-link:hover {
            color: var(--accent-light);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: #1c1e24;
            border-radius: 50%;
            font-size: 1rem;
            flex-shrink: 0;
            transition: background var(--transition-fast), transform var(--transition-smooth);
        }
        .logo-link:hover .logo-icon {
            background: var(--accent-light);
            transform: rotate(-12deg) scale(1.08);
        }

        /* 分段标签导航 */
        .nav-chips {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 2px 0;
        }
        .nav-chips::-webkit-scrollbar {
            display: none;
        }
        .nav-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-chip);
            white-space: nowrap;
            transition: all var(--transition-smooth);
            text-decoration: none;
            letter-spacing: 0.02em;
            position: relative;
        }
        .nav-chip:hover {
            color: var(--text-primary);
            border-color: var(--border-light);
            background: rgba(255, 255, 255, 0.03);
        }
        .nav-chip.active {
            color: #1c1e24;
            background: var(--accent);
            border-color: var(--accent);
            font-weight: 600;
            box-shadow: 0 2px 12px var(--accent-glow);
        }
        .nav-chip.active:hover {
            color: #1c1e24;
            background: var(--accent-light);
            border-color: var(--accent-light);
        }
        .nav-chip:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* 移动端导航横滚提示 */
        .nav-scroll-hint {
            display: none;
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 36px;
            height: 36px;
            pointer-events: none;
            background: linear-gradient(to right, transparent, rgba(28, 30, 36, 0.9));
            border-radius: 50%;
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            padding: var(--spacing-md) 0;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .breadcrumb .separator {
            color: var(--border-light);
            font-size: 0.75rem;
        }
        .breadcrumb .current {
            color: var(--accent-light);
            font-weight: 500;
        }

        /* ========== 分类 Banner ========== */
        .category-banner {
            position: relative;
            padding: var(--spacing-3xl) 0 var(--spacing-2xl);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 35%;
            background-repeat: no-repeat;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(
                180deg,
                rgba(28, 30, 36, 0.82) 0%,
                rgba(28, 30, 36, 0.7) 40%,
                rgba(28, 30, 36, 0.88) 100%
            );
            z-index: 1;
        }
        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 25% 40%, rgba(196, 145, 98, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 60% 70%, rgba(139, 115, 85, 0.08) 0%, transparent 50%);
            z-index: 1;
            pointer-events: none;
        }
        .banner-content {
            position: relative;
            z-index: 2;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        .banner-badge {
            display: inline-block;
            padding: 6px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent-light);
            background: rgba(196, 145, 98, 0.12);
            border: 1px solid rgba(196, 145, 98, 0.3);
            border-radius: var(--radius-chip);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: var(--spacing-md);
        }
        .banner-title {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: 0.03em;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
        }
        .banner-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.75;
        }
        .banner-stats {
            display: flex;
            gap: var(--spacing-lg);
            margin-top: var(--spacing-lg);
            flex-wrap: wrap;
        }
        .banner-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .banner-stat-value {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--accent-light);
        }
        .banner-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ========== 主体布局 ========== */
        .main-content {
            padding: var(--spacing-2xl) 0 var(--spacing-3xl);
        }
        .section-title {
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-lg);
            letter-spacing: 0.03em;
            position: relative;
            padding-bottom: var(--spacing-sm);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 48px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-title--center {
            text-align: center;
        }
        .section-title--center::after {
            left: 50%;
            transform: translateX(-50%);
        }

        /* ========== 文章网格 ========== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .article-card::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid transparent;
            transition: border-color var(--transition-smooth);
            pointer-events: none;
            z-index: 2;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            background: var(--bg-card-hover);
        }
        .article-card:hover::before {
            border-color: rgba(196, 145, 98, 0.25);
        }
        .article-card-image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform var(--transition-smooth);
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.05);
        }
        .article-card-image .image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(28, 30, 36, 0.5) 0%, transparent 40%);
            z-index: 1;
        }
        .article-card-tags {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .article-tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 500;
            color: #1c1e24;
            background: var(--accent-light);
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
            backdrop-filter: blur(4px);
        }
        .article-card-body {
            padding: var(--spacing-md);
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-xs);
            position: relative;
            z-index: 1;
        }
        .article-card-date {
            font-size: 0.82rem;
            color: var(--text-muted);
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
        }
        .article-card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }
        .article-card:hover .article-card-title {
            color: var(--accent-light);
        }
        .article-card-excerpt {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .article-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--accent-light);
            margin-top: auto;
            padding-top: var(--spacing-xs);
            transition: gap var(--transition-fast), color var(--transition-fast);
        }
        .article-card-link .arrow {
            display: inline-block;
            transition: transform var(--transition-fast);
        }
        .article-card:hover .article-card-link {
            gap: 10px;
            color: var(--accent);
        }
        .article-card:hover .article-card-link .arrow {
            transform: translateX(3px);
        }

        /* ========== 精选板块 ========== */
        .featured-section {
            margin-top: var(--spacing-3xl);
            padding: var(--spacing-2xl) 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .featured-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            display: flex;
            gap: var(--spacing-md);
            align-items: flex-start;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .featured-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            background: var(--bg-card-hover);
        }
        .featured-card-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(196, 145, 98, 0.15);
            border: 1px solid rgba(196, 145, 98, 0.3);
            border-radius: var(--radius);
            font-size: 1.3rem;
            color: var(--accent-light);
        }
        .featured-card-content h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .featured-card-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-section {
            margin-top: var(--spacing-3xl);
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            max-width: var(--container-narrow);
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--spacing-md);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            cursor: pointer;
            background: transparent;
            border: none;
            gap: var(--spacing-sm);
            transition: color var(--transition-fast);
            letter-spacing: 0.02em;
        }
        .faq-question:hover {
            color: var(--accent-light);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1.5px solid var(--border-light);
            border-radius: 50%;
            font-size: 1rem;
            color: var(--text-muted);
            transition: all var(--transition-smooth);
            font-family: var(--font-mono);
            line-height: 1;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent);
            color: var(--accent-light);
            background: rgba(196, 145, 98, 0.1);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 var(--spacing-md) var(--spacing-md);
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== CTA ========== */
        .cta-section {
            margin-top: var(--spacing-3xl);
            padding: var(--spacing-2xl);
            background: var(--bg-card);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(196, 145, 98, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            position: relative;
        }
        .cta-desc {
            font-size: 0.98rem;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-md);
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-chip);
            transition: all var(--transition-smooth);
            text-decoration: none;
            letter-spacing: 0.03em;
            cursor: pointer;
            position: relative;
        }
        .btn-primary {
            background: var(--accent);
            color: #1c1e24;
            border: 2px solid var(--accent);
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            box-shadow: 0 6px 24px rgba(196, 145, 98, 0.35);
            transform: translateY(-1px);
            color: #1c1e24;
        }
        .btn-outline {
            background: transparent;
            color: var(--accent-light);
            border: 2px solid var(--border-accent);
        }
        .btn-outline:hover {
            background: rgba(196, 145, 98, 0.08);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-1px);
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: var(--spacing-2xl) 0 var(--spacing-lg);
            margin-top: var(--spacing-3xl);
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: var(--spacing-xl);
            padding-bottom: var(--spacing-lg);
            border-bottom: 1px solid var(--border);
        }
        .footer-brand .logo-link {
            font-size: 1.2rem;
            margin-bottom: var(--spacing-sm);
            display: inline-flex;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 380px;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-lg);
        }
        .footer-link-group h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.03em;
        }
        .footer-link-group a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-muted);
            padding: 4px 0;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .footer-link-group a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            padding-top: var(--spacing-md);
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-md);
            }
            .featured-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .banner-title {
                font-size: 1.8rem;
            }
            .category-banner {
                padding: var(--spacing-2xl) 0 var(--spacing-xl);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                padding: var(--spacing-xs) 0;
                gap: var(--spacing-sm);
            }
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .nav-chip {
                padding: 6px 14px;
                font-size: 0.82rem;
            }
            .articles-grid {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
            }
            .banner-title {
                font-size: 1.55rem;
            }
            .banner-desc {
                font-size: 0.95rem;
            }
            .banner-stats {
                gap: var(--spacing-md);
            }
            .banner-stat-value {
                font-size: 1.25rem;
            }
            .cta-section {
                padding: var(--spacing-lg);
            }
            .cta-title {
                font-size: 1.25rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .featured-card {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .category-banner {
                padding: var(--spacing-xl) 0 var(--spacing-lg);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: var(--spacing-sm);
                padding-right: var(--spacing-sm);
            }
            .header-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--spacing-xs);
            }
            .nav-chips {
                width: 100%;
                gap: 4px;
            }
            .nav-chip {
                padding: 6px 12px;
                font-size: 0.78rem;
            }
            .banner-title {
                font-size: 1.3rem;
            }
            .banner-desc {
                font-size: 0.88rem;
            }
            .banner-stats {
                flex-direction: column;
                gap: var(--spacing-sm);
            }
            .articles-grid {
                grid-template-columns: 1fr;
            }
            .footer-links {
                grid-template-columns: 1fr;
                gap: var(--spacing-md);
            }
            .breadcrumb {
                font-size: 0.78rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .cta-section {
                padding: var(--spacing-md);
            }
        }