/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --bg-deep: #1c1814;
            --bg-body: #221d17;
            --bg-card: #2a241e;
            --bg-card-alt: #25201a;
            --bg-nav: #1e1a15;
            --bg-hero-overlay: rgba(16, 13, 10, 0.72);
            --text-primary: #e8dcc8;
            --text-secondary: #c4b99a;
            --text-muted: #9a8e7a;
            --text-dim: #6b6052;
            --color-gold: #c4a265;
            --color-gold-light: #d9bb7a;
            --color-gold-dark: #a88640;
            --color-amber: #b8944d;
            --color-rust: #8b5e3c;
            --color-warm-red: #a0523b;
            --border-soft: #3d342a;
            --border-medium: #4a4036;
            --border-decor: #5a4e3e;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.35);
            --shadow-md: 0 4px 14px rgba(0,0,0,0.45);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.55);
            --shadow-inner: inset 0 1px 3px rgba(0,0,0,0.3);
            --radius-xs: 3px;
            --radius-sm: 5px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --font-title: 'STSong', 'SimSun', 'Noto Serif SC', 'Songti SC', 'KaiTi', serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'STHeiti', sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', 'Courier New', monospace;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --max-width: 1200px;
            --nav-height: 68px;
            --section-gap-lg: 88px;
            --section-gap-md: 60px;
            --section-gap-sm: 40px;
        }

        /* ========== 基础 Reset ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            font-size: 1rem;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--bg-body);
            background-image:
                radial-gradient(ellipse at 50% 0%, rgba(180,140,100,0.04) 0%, transparent 70%),
                radial-gradient(ellipse at 20% 60%, rgba(160,120,80,0.03) 0%, transparent 50%);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

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

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

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

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

        ul, ol {
            list-style: none;
        }

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

        /* ========== 容器 ========== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }
        .container--narrow {
            max-width: 900px;
        }
        .container--wide {
            max-width: 1320px;
        }

        /* ========== Header & 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-nav);
            border-bottom: 1px solid var(--border-medium);
            box-shadow: var(--shadow-sm);
            height: var(--nav-height);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            position: relative;
        }

        /* 导航左右区域 */
        .nav-group {
            display: flex;
            align-items: center;
            gap: 0;
            flex: 1;
        }
        .nav-group--left {
            justify-content: flex-start;
        }
        .nav-group--right {
            justify-content: flex-end;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-xs);
            transition: color var(--transition-fast), background var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--color-gold-light);
            background: rgba(196,162,101,0.07);
        }
        .nav-link--active {
            color: var(--color-gold);
            font-weight: 600;
        }
        .nav-link--active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-gold);
            border-radius: 1px;
        }

        /* Logo 居中 */
        .site-logo {
            flex-shrink: 0;
            padding: 0 20px;
        }
        .site-logo a {
            font-family: var(--font-title);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-gold);
            letter-spacing: 0.04em;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition-fast);
        }
        .site-logo a:hover {
            color: var(--color-gold-light);
        }
        .site-logo .logo-icon {
            width: 32px;
            height: 32px;
            border: 2px solid var(--color-gold);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
            background: rgba(196,162,101,0.08);
        }

        /* 汉堡菜单按钮 */
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            padding: 6px;
            cursor: pointer;
            z-index: 1010;
            border-radius: var(--radius-xs);
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-toggle:hover {
            background: rgba(196,162,101,0.1);
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 1px;
            transition: transform var(--transition-base), opacity var(--transition-fast);
            margin: 3px 0;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        /* 移动端导航抽屉 */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.6);
            z-index: 998;
        }
        .mobile-nav-overlay.active {
            display: block;
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            height: 100vh;
            background: var(--bg-nav);
            border-left: 1px solid var(--border-medium);
            z-index: 999;
            padding: 24px 20px;
            flex-direction: column;
            gap: 6px;
            box-shadow: var(--shadow-lg);
            transform: translateX(100%);
            transition: transform var(--transition-base);
        }
        .mobile-nav-panel.active {
            display: flex;
            transform: translateX(0);
        }
        .mobile-nav-panel .nav-link {
            padding: 14px 16px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
        }
        .mobile-nav-panel .nav-link--active {
            border-color: var(--border-decor);
            background: rgba(196,162,101,0.08);
        }
        .mobile-nav-panel .nav-link--active::after {
            display: none;
        }
        .mobile-nav-close {
            align-self: flex-end;
            width: 36px;
            height: 36px;
            font-size: 1.3rem;
            color: var(--text-muted);
            cursor: pointer;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color var(--transition-fast), background var(--transition-fast);
            margin-bottom: 10px;
        }
        .mobile-nav-close:hover {
            color: var(--text-primary);
            background: rgba(255,255,255,0.05);
        }

        /* ========== Hero 首屏 ========== */
        .hero {
            position: relative;
            background: var(--bg-deep);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 560px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            border-bottom: 1px solid var(--border-medium);
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--bg-hero-overlay);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg-body), transparent);
            z-index: 2;
        }
        .hero .container {
            position: relative;
            z-index: 3;
            padding-top: 60px;
            padding-bottom: 70px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border: 1px solid var(--border-decor);
            border-radius: 20px;
            font-size: 0.85rem;
            color: var(--color-gold-light);
            letter-spacing: 0.06em;
            margin-bottom: 22px;
            background: rgba(196,162,101,0.06);
            font-family: var(--font-title);
        }
        .hero-title {
            font-family: var(--font-title);
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 700;
            color: #f5ecd7;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.5);
            line-height: 1.25;
        }
        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            justify-content: center;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: all var(--transition-base);
            text-align: center;
            white-space: nowrap;
            font-family: var(--font-body);
            position: relative;
            overflow: hidden;
        }
        .btn--primary {
            background: var(--color-gold);
            color: #1c1814;
            border: 2px solid var(--color-gold);
            box-shadow: var(--shadow-sm);
        }
        .btn--primary:hover {
            background: var(--color-gold-light);
            border-color: var(--color-gold-light);
            color: #1c1814;
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn--outline {
            background: transparent;
            color: var(--color-gold);
            border: 2px solid var(--color-gold);
        }
        .btn--outline:hover {
            background: var(--color-gold);
            color: #1c1814;
            border-color: var(--color-gold);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn--ghost {
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-medium);
        }
        .btn--ghost:hover {
            color: var(--color-gold-light);
            border-color: var(--border-decor);
            background: rgba(196,162,101,0.06);
        }
        .btn--sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-xs);
        }
        .btn--lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: var(--section-gap-lg) 0;
        }
        .section--dark {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }
        .section--alt {
            background: var(--bg-card-alt);
            border-top: 1px solid var(--border-soft);
            border-bottom: 1px solid var(--border-soft);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            color: var(--color-amber);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 10px;
            font-weight: 600;
            font-family: var(--font-title);
        }
        .section-title {
            font-family: var(--font-title);
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }
        .section-desc {
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto;
            font-size: 0.95rem;
        }
        .section-divider {
            width: 50px;
            height: 3px;
            background: var(--color-gold);
            margin: 16px auto;
            border-radius: 2px;
            opacity: 0.7;
        }

        /* ========== 三列卡片网格 ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cards-grid--2col {
            grid-template-columns: repeat(2, 1fr);
        }
        .cards-grid--4col {
            grid-template-columns: repeat(4, 1fr);
        }

        /* ========== 卡片组件 ========== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-base);
            position: relative;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            border-color: var(--border-decor);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            background: #2d2720;
        }
        .card__icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(196,162,101,0.1);
            border: 1px solid var(--border-decor);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 1.3rem;
            color: var(--color-gold);
            flex-shrink: 0;
        }
        .card__title {
            font-family: var(--font-title);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .card__text {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            flex-grow: 1;
        }
        .card__link {
            margin-top: 14px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--color-gold);
            transition: color var(--transition-fast);
        }
        .card__link:hover {
            color: var(--color-gold-light);
        }
        .card__link::after {
            content: '→';
            transition: transform var(--transition-fast);
        }
        .card__link:hover::after {
            transform: translateX(4px);
        }

        /* 特色卡片（带图片） */
        .card--featured {
            overflow: hidden;
            padding: 0;
            border-radius: var(--radius-lg);
        }
        .card--featured .card__image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-soft);
        }
        .card--featured .card__body {
            padding: 22px 20px;
        }
        .card--featured .card__title {
            font-size: 1.05rem;
        }

        /* ========== 日志卡（复古手账风格） ========== */
        .journal-card {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-left: 4px solid var(--color-gold-dark);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 20px 22px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .journal-card:hover {
            border-left-color: var(--color-gold);
            box-shadow: var(--shadow-md);
            transform: translateX(2px);
            background: #2d2720;
        }
        .journal-card::before {
            content: '';
            position: absolute;
            top: 14px;
            left: -10px;
            width: 16px;
            height: 16px;
            background: var(--color-gold-dark);
            border-radius: 50%;
            border: 2px solid var(--bg-body);
        }
        .journal-card__meta {
            font-size: 0.8rem;
            color: var(--text-dim);
            margin-bottom: 6px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
        }
        .journal-card__title {
            font-family: var(--font-title);
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .journal-card__title a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }
        .journal-card__title a:hover {
            color: var(--color-gold-light);
        }
        .journal-card__excerpt {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.65;
        }
        .journal-card__tag {
            display: inline-block;
            padding: 3px 10px;
            border: 1px solid var(--border-decor);
            border-radius: 12px;
            font-size: 0.75rem;
            color: var(--color-amber);
            letter-spacing: 0.04em;
            background: rgba(184,148,77,0.06);
        }

        /* ========== 分类入口卡片 ========== */
        .category-entry-card {
            display: block;
            background: var(--bg-card);
            border: 2px solid var(--border-soft);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            text-decoration: none;
            position: relative;
        }
        .category-entry-card:hover {
            border-color: var(--color-gold-dark);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .category-entry-card__image {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-soft);
        }
        .category-entry-card__body {
            padding: 24px 22px;
            text-align: center;
        }
        .category-entry-card__title {
            font-family: var(--font-title);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .category-entry-card__desc {
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .category-entry-card__arrow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border: 2px solid var(--border-decor);
            border-radius: 50%;
            margin-top: 12px;
            color: var(--color-gold);
            transition: all var(--transition-fast);
        }
        .category-entry-card:hover .category-entry-card__arrow {
            background: var(--color-gold);
            color: #1c1814;
            border-color: var(--color-gold);
        }

        /* ========== 流程步骤 ========== */
        .steps-row {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
            counter-reset: step;
        }
        .step-item {
            flex: 1;
            min-width: 200px;
            max-width: 260px;
            text-align: center;
            padding: 28px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .step-item:hover {
            border-color: var(--border-decor);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            margin: 0 auto 14px;
            border: 2px solid var(--color-gold);
            border-radius: 50%;
            font-family: var(--font-title);
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-gold);
            background: rgba(196,162,101,0.06);
        }
        .step-item__title {
            font-family: var(--font-title);
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .step-item__desc {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.6;
        }

        /* ========== 数据统计行 ========== */
        .stats-row {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .stat-block {
            flex: 1;
            min-width: 150px;
            max-width: 220px;
            text-align: center;
            padding: 24px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }
        .stat-block:hover {
            border-color: var(--border-decor);
            box-shadow: var(--shadow-md);
        }
        .stat-block__number {
            font-family: var(--font-title);
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--color-gold);
            letter-spacing: 0.03em;
            line-height: 1;
        }
        .stat-block__label {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-top: 6px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--border-decor);
        }
        .faq-item summary {
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
            list-style: none;
            transition: color var(--transition-fast);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 1.3rem;
            color: var(--color-gold);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            font-weight: 300;
        }
        .faq-item[open] summary {
            color: var(--color-gold-light);
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        /* ========== CTA 板块 ========== */
        .cta-section {
            background: var(--bg-deep);
            border: 2px solid var(--border-decor);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            border: 2px solid rgba(196,162,101,0.12);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -30px;
            width: 100px;
            height: 100px;
            border: 2px solid rgba(196,162,101,0.1);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section .section-title {
            position: relative;
            z-index: 1;
        }
        .cta-section .section-desc {
            position: relative;
            z-index: 1;
        }
        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 2px solid var(--border-medium);
            padding: 44px 0 28px;
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand-name {
            font-family: var(--font-title);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-gold);
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .footer-desc {
            color: var(--text-dim);
            line-height: 1.7;
            font-size: 0.85rem;
        }
        .footer-col-title {
            font-weight: 700;
            color: var(--text-secondary);
            margin-bottom: 12px;
            font-size: 0.9rem;
            letter-spacing: 0.04em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-links a {
            color: var(--text-dim);
            font-size: 0.85rem;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-gold-light);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-soft);
            padding-top: 18px;
            text-align: center;
            color: var(--text-dim);
            font-size: 0.8rem;
            letter-spacing: 0.03em;
        }
        .footer-bottom strong {
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* ========== 标签/徽章 ========== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid;
        }
        .badge--gold {
            color: var(--color-gold-dark);
            border-color: var(--color-gold-dark);
            background: rgba(196,162,101,0.08);
        }
        .badge--warm {
            color: var(--color-rust);
            border-color: var(--color-rust);
            background: rgba(139,94,60,0.08);
        }

        /* ========== 空状态 ========== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-dim);
            border: 1px dashed var(--border-soft);
            border-radius: var(--radius-md);
            background: var(--bg-card);
        }
        .empty-state__icon {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        .empty-state__text {
            font-size: 0.95rem;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap-lg: 64px;
                --section-gap-md: 44px;
                --nav-height: 60px;
            }
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .cards-grid--4col {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 0.88rem;
            }
            .site-logo a {
                font-size: 1.15rem;
            }
            .site-logo .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 0.7rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap-lg: 48px;
                --section-gap-md: 34px;
                --section-gap-sm: 28px;
                --nav-height: 56px;
            }
            .container {
                padding: 0 16px;
            }

            /* 移动端导航 */
            .nav-group--left,
            .nav-group--right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .site-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                padding: 0;
            }
            .site-logo a {
                font-size: 1.1rem;
            }
            .site-logo .logo-icon {
                width: 24px;
                height: 24px;
                font-size: 0.65rem;
            }

            .cards-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cards-grid--2col,
            .cards-grid--4col {
                grid-template-columns: 1fr;
            }
            .steps-row {
                flex-direction: column;
                align-items: center;
            }
            .step-item {
                max-width: 100%;
                width: 100%;
            }
            .stats-row {
                gap: 12px;
            }
            .stat-block {
                min-width: 120px;
                flex: 0 0 calc(50% - 12px);
                max-width: calc(50% - 12px);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .hero {
                min-height: 420px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .category-entry-card__image {
                height: 160px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero {
                min-height: 340px;
            }
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-subtitle {
                font-size: 0.85rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stat-block {
                flex: 0 0 100%;
                max-width: 100%;
            }
            .cta-section {
                padding: 24px 16px;
                border-radius: var(--radius-md);
            }
            .section-header {
                margin-bottom: 28px;
            }
            .card {
                padding: 20px 16px;
            }
            .journal-card {
                padding: 16px 14px;
            }
            .mobile-nav-panel {
                width: 260px;
            }
        }

/* roulang page: article */
/* ============ 设计变量 ============ */
        :root {
            --color-bg: #fdf6ed;
            --color-bg-warm: #faf3e6;
            --color-surface: #fffaf3;
            --color-surface-alt: #fef7ec;
            --color-text: #3d2b1f;
            --color-text-rich: #2c1d12;
            --color-text-muted: #8b7355;
            --color-text-light: #b8a088;
            --color-primary: #8b4513;
            --color-primary-hover: #a0522d;
            --color-primary-soft: #c4825a;
            --color-accent: #c4a35a;
            --color-accent-soft: #dcc88a;
            --color-border: #d4c5b2;
            --color-border-strong: #b8a388;
            --color-border-light: #e8ddd0;
            --color-card-bg: #fef9f1;
            --color-card-shadow: rgba(139, 69, 19, 0.08);
            --color-card-hover-shadow: rgba(139, 69, 19, 0.16);
            --color-overlay: rgba(45, 28, 15, 0.55);
            --color-tag-bg: #f5ede0;
            --color-tag-text: #7a5c3e;
            --color-divider: #e0d5c4;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-card: 0 2px 12px var(--color-card-shadow), 0 1px 3px rgba(139, 69, 19, 0.04);
            --shadow-card-hover: 0 8px 28px var(--color-card-hover-shadow), 0 3px 8px rgba(139, 69, 19, 0.06);
            --shadow-nav: 0 1px 0 var(--color-border-light), 0 2px 8px rgba(139, 69, 19, 0.04);
            --shadow-footer: 0 -1px 0 var(--color-border-light);
            --font-heading: 'PingFang SC', 'Noto Serif SC', 'STSong', 'Songti SC', 'SimSun', 'KaiTi', '楷体', Georgia, 'Times New Roman', serif;
            --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.18s ease;
            --transition-normal: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --max-width-content: 760px;
            --max-width-container: 1140px;
            --section-gap: 64px;
            --section-gap-sm: 40px;
        }

        /* ============ 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(--color-text);
            background-color: var(--color-bg);
            background-image:
                radial-gradient(ellipse at 15% 8%, rgba(196, 163, 90, 0.05) 0%, transparent 55%),
                radial-gradient(ellipse at 78% 18%, rgba(139, 69, 19, 0.03) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 60%, rgba(180, 140, 100, 0.03) 0%, transparent 60%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-primary-hover);
        }
        a:focus-visible {
            outline: 2px solid var(--color-primary-soft);
            outline-offset: 3px;
            border-radius: 3px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
        }
        button:focus-visible {
            outline: 2px solid var(--color-primary-soft);
            outline-offset: 3px;
            border-radius: 3px;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            line-height: 1.35;
            font-weight: 700;
            color: var(--color-text-rich);
        }
        p {
            margin-bottom: 1em;
        }
        ul, ol {
            padding-left: 1.5em;
            margin-bottom: 1em;
        }
        li {
            margin-bottom: 0.35em;
        }

        /* ============ Container ============ */
        .container {
            width: 100%;
            max-width: var(--max-width-container);
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .container--narrow {
            max-width: var(--max-width-content);
        }

        /* ============ Header / Nav ============ */
        .site-header {
            background: var(--color-surface);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-nav);
            border-bottom: 1px solid var(--color-border-light);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            background: rgba(255, 250, 243, 0.94);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            position: relative;
        }
        .nav-group {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 0 0 auto;
        }
        .nav-group--left {
            justify-content: flex-start;
            min-width: 100px;
        }
        .nav-group--right {
            justify-content: flex-end;
            min-width: 100px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--color-text-muted);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            position: relative;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: var(--color-tag-bg);
        }
        .nav-link--active {
            color: var(--color-primary);
            font-weight: 600;
        }
        .nav-link--active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        /* Logo */
        .site-logo {
            flex: 0 0 auto;
            text-align: center;
            padding: 0 12px;
        }
        .site-logo a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-size: 1.18rem;
            font-weight: 700;
            color: var(--color-text-rich);
            letter-spacing: 0.03em;
            text-decoration: none;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .site-logo a:hover {
            color: var(--color-primary);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #fff;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            letter-spacing: 0;
        }

        /* Hamburger */
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            z-index: 110;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-text);
            border-radius: 2px;
            transition: transform var(--transition-normal), opacity var(--transition-fast);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* Mobile nav overlay */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(45, 28, 15, 0.6);
            z-index: 95;
            opacity: 0;
            transition: opacity var(--transition-normal);
            pointer-events: none;
        }
        .mobile-nav-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--color-surface);
            z-index: 96;
            padding: 20px 24px;
            box-shadow: var(--shadow-card-hover);
            border-bottom: 2px solid var(--color-border);
            transform: translateY(-12px);
            opacity: 0;
            transition: transform var(--transition-normal), opacity var(--transition-normal);
            pointer-events: none;
        }
        .mobile-nav-panel.active {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-nav-panel .nav-link {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            border-bottom: 1px solid var(--color-border-light);
            text-align: center;
        }
        .mobile-nav-panel .nav-link:last-child {
            border-bottom: none;
        }

        /* ============ Page Banner (内页) ============ */
        .page-banner {
            position: relative;
            background: var(--color-bg-warm) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 64px 0 52px;
            text-align: center;
            border-bottom: 3px solid var(--color-border);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(253, 246, 237, 0.82) 0%, rgba(250, 243, 230, 0.88) 40%, rgba(245, 235, 218, 0.92) 100%);
            z-index: 1;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--color-bg) 0%, transparent 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner__category {
            display: inline-block;
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 500;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            border: 1px solid var(--color-border-light);
        }
        .page-banner__title {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text-rich);
            max-width: 700px;
            margin: 0 auto 10px;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .page-banner__meta {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            letter-spacing: 0.03em;
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-bar {
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border-light);
            background: var(--color-surface-alt);
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: 0.86rem;
            color: var(--color-text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }
        .breadcrumb a {
            color: var(--color-text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-primary);
        }
        .breadcrumb .sep {
            color: var(--color-text-light);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--color-text);
            font-weight: 500;
        }

        /* ============ Article Main ============ */
        .article-main {
            padding: var(--section-gap) 0;
            flex: 1;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
        }

        /* Article Card */
        .article-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: box-shadow var(--transition-normal);
        }
        .article-card:hover {
            box-shadow: var(--shadow-card-hover);
        }
        .article-card__image-wrap {
            position: relative;
            overflow: hidden;
            border-bottom: 2px solid var(--color-border-light);
            background: var(--color-bg-warm);
        }
        .article-card__image-wrap img {
            width: 100%;
            max-height: 420px;
            object-fit: cover;
            display: block;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card__image-wrap img {
            transform: scale(1.015);
        }
        .article-card__body {
            padding: 36px 40px 44px;
        }
        .article-card__meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-bottom: 20px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
        }
        .article-card__meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .article-card__meta-dot {
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--color-accent);
            flex-shrink: 0;
        }
        .article-card__tag {
            display: inline-block;
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            border: 1px solid var(--color-border-light);
        }

        /* Article Content Typography */
        .article-content {
            font-size: 1.04rem;
            line-height: 1.85;
            color: var(--color-text);
            word-break: break-word;
        }
        .article-content h2 {
            font-size: 1.45rem;
            margin-top: 1.8em;
            margin-bottom: 0.55em;
            padding-bottom: 0.35em;
            border-bottom: 2px solid var(--color-divider);
            color: var(--color-text-rich);
        }
        .article-content h3 {
            font-size: 1.22rem;
            margin-top: 1.5em;
            margin-bottom: 0.5em;
            color: var(--color-text-rich);
        }
        .article-content h4 {
            font-size: 1.08rem;
            margin-top: 1.3em;
            margin-bottom: 0.45em;
            color: var(--color-text);
        }
        .article-content p {
            margin-bottom: 1.15em;
        }
        .article-content ul, .article-content ol {
            margin-bottom: 1.15em;
            padding-left: 1.6em;
        }
        .article-content li {
            margin-bottom: 0.4em;
        }
        .article-content blockquote {
            margin: 1.5em 0;
            padding: 16px 22px;
            border-left: 4px solid var(--color-accent);
            background: var(--color-surface-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-muted);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.4em auto;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
        }
        .article-content code {
            background: var(--color-tag-bg);
            padding: 2px 7px;
            border-radius: 3px;
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: var(--color-primary);
            border: 1px solid var(--color-border-light);
        }
        .article-content pre {
            background: #2c1d12;
            color: #f5ede0;
            padding: 18px 22px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.4em 0;
            font-family: var(--font-mono);
            font-size: 0.9rem;
            line-height: 1.6;
            border: 2px solid var(--color-border-strong);
        }
        .article-content pre code {
            background: none;
            padding: 0;
            border: none;
            color: inherit;
            font-size: inherit;
        }

        /* Divider */
        .article-divider {
            border: none;
            border-top: 2px dashed var(--color-divider);
            margin: 32px 0;
        }

        /* article-footer-actions */
        .article-footer-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            padding-top: 8px;
        }

        /* ============ Not Found State ============ */
        .not-found-card {
            text-align: center;
            padding: 60px 30px;
            background: var(--color-card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 2px dashed var(--color-border);
        }
        .not-found-card__icon {
            font-size: 3.5rem;
            margin-bottom: 16px;
            display: block;
            color: var(--color-text-light);
        }
        .not-found-card__title {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            color: var(--color-text-rich);
            margin-bottom: 8px;
        }
        .not-found-card__desc {
            color: var(--color-text-muted);
            margin-bottom: 22px;
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            padding: 11px 24px;
            font-size: 0.94rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
            transition: all var(--transition-fast);
            cursor: pointer;
            border: 2px solid transparent;
            text-decoration: none;
            font-family: var(--font-body);
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-primary-soft);
            outline-offset: 3px;
        }
        .btn--primary {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            box-shadow: 0 2px 8px rgba(139, 69, 19, 0.25);
        }
        .btn--primary:hover {
            background: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
            box-shadow: 0 4px 16px rgba(139, 69, 19, 0.35);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 1px 4px rgba(139, 69, 19, 0.3);
        }
        .btn--outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-border-strong);
        }
        .btn--outline:hover {
            background: var(--color-tag-bg);
            border-color: var(--color-primary);
            color: var(--color-primary-hover);
            transform: translateY(-1px);
        }
        .btn--outline:active {
            transform: translateY(0);
        }
        .btn--sm {
            padding: 7px 16px;
            font-size: 0.84rem;
        }
        .btn--lg {
            padding: 14px 30px;
            font-size: 1.02rem;
            border-radius: var(--radius-md);
        }

        /* ============ Related Section ============ */
        .related-section {
            padding: var(--section-gap) 0;
            background: var(--color-surface-alt);
            border-top: 2px solid var(--color-border-light);
            border-bottom: 2px solid var(--color-border-light);
        }
        .related-section__title {
            font-family: var(--font-heading);
            font-size: 1.35rem;
            text-align: center;
            margin-bottom: 28px;
            color: var(--color-text-rich);
            letter-spacing: 0.03em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-normal);
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
            border-color: var(--color-border-strong);
        }
        .related-card__img {
            height: 160px;
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--color-border-light);
        }
        .related-card__body {
            padding: 16px 18px 18px;
        }
        .related-card__title {
            font-family: var(--font-heading);
            font-size: 0.96rem;
            font-weight: 600;
            color: var(--color-text-rich);
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card__meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding: var(--section-gap) 0;
            text-align: center;
        }
        .cta-card {
            background: var(--color-card-bg);
            border-radius: var(--radius-xl);
            padding: 48px 36px;
            box-shadow: var(--shadow-card);
            border: 2px solid var(--color-border-light);
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(196, 163, 90, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-card__title {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            color: var(--color-text-rich);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-card__desc {
            color: var(--color-text-muted);
            margin-bottom: 22px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-card .btn {
            position: relative;
            z-index: 1;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--color-surface);
            border-top: 3px solid var(--color-border);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand-name {
            font-family: var(--font-heading);
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text-rich);
            margin-bottom: 8px;
            letter-spacing: 0.04em;
        }
        .footer-desc {
            color: var(--color-text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
            max-width: 320px;
        }
        .footer-col-title {
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 12px;
            font-size: 0.94rem;
            letter-spacing: 0.03em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            color: var(--color-text-muted);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border-light);
            padding-top: 18px;
            text-align: center;
            font-size: 0.82rem;
            color: var(--color-text-light);
        }
        .footer-bottom strong {
            color: var(--color-text-muted);
            font-weight: 600;
        }
        .footer-bottom span {
            color: var(--color-text-light);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .article-card__body {
                padding: 26px 24px 32px;
            }
            .page-banner__title {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-grid > div:first-child {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            .site-header .container {
                height: 56px;
            }
            .nav-group--left,
            .nav-group--right {
                display: none;
            }
            .nav-toggle {
                display: flex;
                order: -1;
            }
            .mobile-nav-overlay,
            .mobile-nav-panel {
                display: block;
            }
            .site-logo {
                position: absolute;
                left: 50%;
                transform: translateX(-50%);
                padding: 0;
            }
            .site-logo a {
                font-size: 1.02rem;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .page-banner {
                padding: 40px 0 32px;
            }
            .page-banner__title {
                font-size: 1.35rem;
            }
            .article-card__body {
                padding: 20px 16px 26px;
            }
            .article-content {
                font-size: 0.96rem;
            }
            .article-content h2 {
                font-size: 1.25rem;
            }
            .article-content h3 {
                font-size: 1.1rem;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .related-card__img {
                height: 120px;
            }
            .cta-card {
                padding: 32px 20px;
            }
            .cta-card__title {
                font-size: 1.25rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .section-gap,
            :root {
                --section-gap: 40px;
            }
            .article-main {
                padding: 32px 0;
            }
            .related-section {
                padding: 36px 0;
            }
            .cta-section {
                padding: 36px 0;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .page-banner__title {
                font-size: 1.18rem;
            }
            .article-card__body {
                padding: 16px 12px 20px;
            }
            .article-card__meta-row {
                gap: 10px;
                font-size: 0.8rem;
            }
            .article-content {
                font-size: 0.9rem;
                line-height: 1.75;
            }
            .article-content h2 {
                font-size: 1.15rem;
            }
            .article-content h3 {
                font-size: 1.02rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .related-card__img {
                height: 140px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 0.86rem;
            }
            .btn--lg {
                padding: 12px 22px;
                font-size: 0.92rem;
            }
            .cta-card {
                padding: 24px 14px;
            }
            .footer-grid {
                gap: 16px;
            }
        }

/* roulang page: category1 */
/* ==================== 设计变量 ==================== */
        :root {
            --bg-primary: #1c1a18;
            --bg-secondary: #221f1d;
            --bg-card: #2a2724;
            --bg-card-hover: #302d2a;
            --bg-card-alt: #252220;
            --bg-input: #1e1c1a;
            --text-primary: #e8e0d5;
            --text-secondary: #b8aFA0;
            --text-muted: #8a8075;
            --text-heading: #efe7dc;
            --accent: #c49a6c;
            --accent-soft: #b08968;
            --accent-hover: #d4ae7c;
            --accent-glow: rgba(196, 154, 108, 0.18);
            --accent-subtle: rgba(196, 154, 108, 0.08);
            --border: #3a3530;
            --border-light: #4a4540;
            --border-card: #3e3933;
            --border-accent: rgba(196, 154, 108, 0.35);
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(255, 255, 255, 0.03);
            --shadow-card-hover: 0 6px 24px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(196, 154, 108, 0.15);
            --radius-xs: 4px;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font-heading: 'Georgia', 'Palatino Linotype', 'Book Antiqua', 'Palatino', 'Noto Serif SC', 'STSong', serif;
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --container-max: 1200px;
            --container-narrow: 900px;
            --header-height: 72px;
            --section-gap: 80px;
            --section-gap-sm: 48px;
        }

        /* ==================== 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);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            letter-spacing: 0.01em;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-heading);
            letter-spacing: 0.02em;
        }
        h1 { font-size: 2.6rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.45rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }

        /* ==================== 容器 ==================== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 28px;
        }
        .container--narrow {
            max-width: var(--container-narrow);
        }

        /* ==================== 主内容区 ==================== */
        .main-content {
            flex: 1;
        }

        /* ==================== Header / 导航 ==================== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(28, 26, 24, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition-base), border-color var(--transition-base);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
        }
        .site-logo {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            white-space: nowrap;
        }
        .site-logo a {
            display: flex;
            align-items: center;
            gap: 9px;
            font-family: var(--font-heading);
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-heading);
            letter-spacing: 0.04em;
            transition: color var(--transition-fast);
        }
        .site-logo a:hover {
            color: var(--accent);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--accent);
            color: #1c1a18;
            font-family: var(--font-heading);
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: 0;
            flex-shrink: 0;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }
        .site-logo a:hover .logo-icon {
            background: var(--accent-hover);
            transform: scale(1.04);
        }
        .nav-group {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-group--left {
            margin-right: auto;
            padding-right: 18px;
        }
        .nav-group--right {
            margin-left: auto;
            padding-left: 18px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
            transition: color var(--transition-fast), background var(--transition-fast);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .nav-link:hover {
            color: var(--text-primary);
            background: var(--accent-subtle);
        }
        .nav-link--active,
        .nav-link[aria-current="page"] {
            color: var(--accent);
            background: var(--accent-subtle);
            border-color: var(--border-accent);
            font-weight: 600;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-xs);
            z-index: 1001;
            transition: background var(--transition-fast);
        }
        .nav-toggle:hover {
            background: var(--accent-subtle);
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            border-radius: 2px;
            background: var(--text-primary);
            transition: transform var(--transition-base), opacity var(--transition-fast);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7.5px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7.5px) rotate(-45deg);
        }

        /* ==================== 面包屑 ==================== */
        .breadcrumb-bar {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border);
            padding: 13px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.88rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: var(--border-light);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--accent);
            font-weight: 500;
        }

        /* ==================== 板块间距 ==================== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section--sm {
            padding: var(--section-gap-sm) 0;
        }
        .section--alt {
            background: var(--bg-secondary);
        }
        .section--dark {
            background: var(--bg-primary);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 10px;
        }
        .section-header .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            margin-bottom: 8px;
        }

        /* ==================== 分类 Banner ==================== */
        .category-banner {
            position: relative;
            padding: 90px 0 80px;
            background: var(--bg-secondary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
            text-align: center;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(28,26,24,0.88) 0%, rgba(28,26,24,0.78) 60%, rgba(28,26,24,0.92) 100%);
            z-index: 1;
        }
        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(196,154,108,0.08) 0%, transparent 70%);
            z-index: 1;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .category-banner .cat-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: var(--accent-subtle);
            border: 1px solid var(--border-accent);
            margin-bottom: 20px;
            font-size: 1.8rem;
        }
        .category-banner h1 {
            font-size: 2.8rem;
            margin-bottom: 12px;
            color: var(--text-heading);
        }
        .category-banner .cat-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 620px;
            margin: 0 auto 6px;
            line-height: 1.7;
        }
        .category-banner .cat-meta {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .category-banner .cat-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin: 0 10px;
        }

        /* ==================== 分类介绍板块 ==================== */
        .cat-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cat-intro-text h3 {
            margin-bottom: 14px;
        }
        .cat-intro-text p {
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .cat-intro-visual {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .cat-stat-card {
            flex: 1;
            min-width: 120px;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            text-align: center;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .cat-stat-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
        }
        .cat-stat-card .stat-num {
            font-family: var(--font-heading);
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 6px;
        }
        .cat-stat-card .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ==================== 文章列表卡片网格 ==================== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-accent);
        }
        .article-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-secondary);
        }
        .article-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .article-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            display: inline-block;
            padding: 5px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            background: rgba(28, 26, 24, 0.85);
            color: var(--accent);
            border-radius: var(--radius-xs);
            border: 1px solid var(--border-accent);
            backdrop-filter: blur(4px);
        }
        .article-card .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.45;
            color: var(--text-heading);
            transition: color var(--transition-fast);
        }
        .article-card:hover .card-body h3 {
            color: var(--accent);
        }
        .article-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .article-card .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ==================== 按钮 ==================== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            cursor: pointer;
            border: 1px solid transparent;
            white-space: nowrap;
            text-align: center;
            line-height: 1.4;
        }
        .btn--primary {
            background: var(--accent);
            color: #1c1a18;
            border-color: var(--accent);
        }
        .btn--primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #1c1a18;
            box-shadow: 0 4px 18px var(--accent-glow);
            transform: translateY(-1px);
        }
        .btn--outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--border-accent);
        }
        .btn--outline:hover {
            background: var(--accent-subtle);
            border-color: var(--accent);
            color: var(--accent-hover);
            box-shadow: 0 4px 18px var(--accent-glow);
            transform: translateY(-1px);
        }
        .btn--sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-xs);
        }
        .btn--lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        /* ==================== 流程步骤 - 横向场景分区 ==================== */
        .steps-horizontal {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }
        .steps-horizontal::before {
            content: '';
            position: absolute;
            top: 36px;
            left: 8%;
            right: 8%;
            height: 1px;
            background: repeating-linear-gradient(90deg, var(--border-light) 0, var(--border-light) 8px, transparent 8px, transparent 16px);
            z-index: 0;
            pointer-events: none;
        }
        .step-card {
            position: relative;
            z-index: 1;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 28px 20px 22px;
            text-align: center;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        }
        .step-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 2px solid var(--border-accent);
            color: var(--accent);
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 14px;
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }
        .step-card:hover .step-number {
            background: var(--accent);
            color: #1c1a18;
            border-color: var(--accent);
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ==================== 提示卡片 ==================== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 22px;
        }
        .tip-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .tip-card:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
        }
        .tip-card .tip-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--accent-subtle);
            border: 1px solid var(--border-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
        }
        .tip-card h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .tip-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ==================== FAQ ==================== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: var(--bg-card);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item.active {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-card-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            cursor: pointer;
            background: transparent;
            border: none;
            gap: 12px;
            transition: color var(--transition-fast), background var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--accent);
            background: var(--accent-subtle);
        }
        .faq-question .faq-arrow {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            transition: transform var(--transition-base);
            color: var(--text-muted);
        }
        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ==================== CTA ==================== */
        .cta-section {
            text-align: center;
            padding: 70px 0;
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(196,154,108,0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            margin-bottom: 10px;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 24px;
            font-size: 1.05rem;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ==================== Footer ==================== */
        .site-footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand-name {
            font-family: var(--font-heading);
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-heading);
            margin-bottom: 8px;
            letter-spacing: 0.03em;
        }
        .footer-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col-title {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom strong {
            color: var(--text-secondary);
            font-weight: 600;
        }

        /* ==================== 装饰元素 ==================== */
        .ornament-divider {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            margin: 20px 0;
            color: var(--border-light);
            font-size: 0.7rem;
            letter-spacing: 0.3em;
            user-select: none;
        }
        .ornament-divider::before,
        .ornament-divider::after {
            content: '';
            width: 60px;
            height: 1px;
            background: var(--border-light);
        }

        /* ==================== 响应式 ==================== */
        @media (max-width: 1024px) {
            :root {
                --header-height: 64px;
                --section-gap: 56px;
                --section-gap-sm: 36px;
            }
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            h3 { font-size: 1.3rem; }
            .site-logo {
                position: static;
                transform: none;
            }
            .nav-group--left {
                margin-right: 0;
                padding-right: 0;
            }
            .nav-group--right {
                margin-left: 0;
                padding-left: 0;
            }
            .site-header .container {
                gap: 8px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 0.88rem;
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .steps-horizontal {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-horizontal::before {
                display: none;
            }
            .cat-intro-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .tips-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .category-banner {
                padding: 60px 0 50px;
            }
            .category-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-gap: 40px;
                --section-gap-sm: 28px;
            }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
            .container {
                padding: 0 18px;
            }
            .site-logo {
                position: static;
                transform: none;
                order: 1;
            }
            .site-logo a {
                font-size: 1.05rem;
                gap: 6px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
            .nav-group--left,
            .nav-group--right {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(28, 26, 24, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border);
                padding: 12px 18px;
                gap: 2px;
                transform: translateY(-120%);
                opacity: 0;
                transition: transform var(--transition-base), opacity var(--transition-base);
                z-index: 999;
                pointer-events: none;
            }
            .nav-group--left.nav-open,
            .nav-group--right.nav-open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-group--left {
                border-bottom: none;
            }
            .nav-group--right {
                top: auto;
                /* 在移动端，两个nav-group合并显示 */;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 0.95rem;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
                order: 2;
            }
            .site-header .container {
                justify-content: space-between;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .steps-horizontal {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .step-card {
                padding: 20px 14px 16px;
            }
            .step-card .step-number {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-banner {
                padding: 44px 0 36px;
            }
            .category-banner h1 {
                font-size: 1.8rem;
            }
            .category-banner .cat-desc {
                font-size: 0.95rem;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .btn--lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
            .cta-section {
                padding: 48px 0;
            }
        }

        @media (max-width: 520px) {
            :root {
                --header-height: 56px;
                --section-gap: 32px;
                --section-gap-sm: 22px;
            }
            h1 { font-size: 1.55rem; }
            h2 { font-size: 1.35rem; }
            h3 { font-size: 1.1rem; }
            .container {
                padding: 0 14px;
            }
            .steps-horizontal {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .cat-stat-card {
                min-width: 90px;
                padding: 16px 12px;
            }
            .cat-stat-card .stat-num {
                font-size: 1.5rem;
            }
            .category-banner {
                padding: 34px 0 28px;
            }
            .category-banner h1 {
                font-size: 1.5rem;
            }
            .category-banner .cat-icon {
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
            }
            .article-card .card-body {
                padding: 14px 16px 16px;
            }
            .article-card .card-body h3 {
                font-size: 1rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.88rem;
            }
            .cta-section p {
                font-size: 0.92rem;
            }
        }

        /* ==================== 辅助工具类 ==================== */
        .text-center { text-align: center; }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 16px; }
        .mt-4 { margin-top: 24px; }
        .mb-2 { margin-bottom: 8px; }
        .mb-3 { margin-bottom: 16px; }
        .mb-4 { margin-bottom: 24px; }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            white-space: nowrap;
            border: 0;
        }