/* roulang page: index */
:root {
            --ink: #1F2A34;
            --bg: #F4F1EC;
            --copper: #C08A3E;
            --copper-dark: #A97432;
            --slate: #6B7A86;
            --card: #FFFFFF;
            --card-warm: #FCFCFA;
            --border: rgba(107, 122, 134, 0.18);
            --success: #3E7C4F;
            --warning: #B55D3C;
            --radius-btn: 6px;
            --radius-card: 12px;
            --radius-input: 8px;
            --radius-tag: 999px;
            --shadow-sm: 0 1px 2px rgba(31, 42, 52, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 42, 52, 0.08);
            --transition-base: 0.3s ease;
            --container: 1280px;
            --header-height: 72px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg);
            color: var(--ink);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        button {
            background: none;
            border: none;
            cursor: pointer;
        }

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

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            line-height: 1.4;
            transition: all 0.25s ease;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--copper);
            color: #1F2A34;
            border: 1px solid var(--copper);
        }

        .btn-primary:hover {
            background: var(--copper-dark);
            border-color: var(--copper-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.75);
            color: #FFFFFF;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #FFFFFF;
            transform: translateY(-2px);
        }

        .btn-outline-inverse {
            border: 2px solid rgba(255, 255, 255, 0.7);
            color: #FFFFFF;
            background: transparent;
        }

        .btn-outline-inverse:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #FFFFFF;
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--copper);
            outline-offset: 2px;
        }

        /* ===== 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(192, 138, 62, 0.1);
            color: var(--copper);
            border-radius: var(--radius-tag);
            font-size: 13px;
            font-weight: 600;
            line-height: 1.5;
        }

        /* ===== 区块头 ===== */
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(192, 138, 62, 0.1);
            color: var(--copper);
            border-radius: var(--radius-tag);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .section-desc {
            color: var(--slate);
            font-size: 15px;
            max-width: 640px;
        }

        .link-arrow {
            font-size: 14px;
            font-weight: 600;
            color: var(--copper);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.25s ease;
            flex-shrink: 0;
        }

        .link-arrow:hover {
            gap: 8px;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-height);
            background: rgba(244, 241, 236, 0.95);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
            display: flex;
            align-items: center;
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
        }

        .logo {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--ink);
            line-height: 1.2;
            white-space: nowrap;
        }

        .logo span {
            color: var(--copper);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            font-weight: 500;
            color: var(--slate);
            background: transparent;
            transition: background 0.25s ease, color 0.25s ease;
        }

        .nav-link:hover {
            background: rgba(192, 138, 62, 0.08);
            color: var(--ink);
        }

        .nav-link.active {
            background: var(--card);
            color: var(--ink);
            box-shadow: var(--shadow-sm);
            font-weight: 600;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-cta .btn {
            padding: 8px 20px;
            font-size: 14px;
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: 6px;
            border: 1px solid var(--border);
            background: var(--card);
        }

        .mobile-toggle span {
            display: block;
            height: 2px;
            background: var(--ink);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

        .mobile-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .mobile-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .mobile-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 640px;
            height: 75vh;
            max-height: 820px;
            display: flex;
            align-items: center;
            background-color: var(--ink);
            color: #FFFFFF;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            z-index: 0;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(31, 42, 52, 0.85) 0%, rgba(31, 42, 52, 0.45) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 1;
            width: 100%;
        }

        .hero-content .container {
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .hero-title {
            font-size: 56px;
            font-weight: 700;
            letter-spacing: 1px;
            line-height: 1.2;
            margin-bottom: 20px;
            animation: heroUp 0.6s ease-out both;
        }

        .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 640px;
            animation: heroUp 0.6s ease-out 0.1s both;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            animation: heroUp 0.6s ease-out 0.2s both;
        }

        .hero-metrics {
            display: flex;
            gap: 48px;
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            animation: heroUp 0.6s ease-out 0.3s both;
        }

        .hero-metric .metric-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--copper);
            font-family: "Helvetica Neue", Arial, sans-serif;
            letter-spacing: 0.5px;
        }

        .hero-metric .metric-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        @keyframes heroUp {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== 数据条 ===== */
        .stats-bar {
            background: var(--card-warm);
            border-bottom: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            padding: 40px 0;
        }

        .stat-item {
            text-align: center;
            padding: 16px 20px;
            border-right: 1px solid var(--border);
        }

        .stat-item:last-child {
            border-right: none;
        }

        .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--ink);
            font-family: "Helvetica Neue", Arial, sans-serif;
            letter-spacing: 1px;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            color: var(--slate);
            margin-top: 6px;
        }

        /* ===== 合集目录 ===== */
        .directory-section {
            padding: 88px 0;
        }

        .directory-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .directory-item {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px 28px;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            color: inherit;
        }

        .directory-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .directory-thumb {
            width: 120px;
            height: 80px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg);
        }

        .directory-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .directory-item:hover .directory-thumb img {
            transform: scale(1.03);
        }

        .directory-index {
            font-size: 42px;
            font-weight: 800;
            font-family: "Helvetica Neue", Arial, sans-serif;
            color: var(--copper);
            line-height: 1;
            flex-shrink: 0;
            min-width: 64px;
        }

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

        .directory-title {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .directory-desc {
            color: var(--slate);
            font-size: 14px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .directory-action {
            font-size: 14px;
            font-weight: 600;
            color: var(--slate);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
            transition: color 0.25s ease, gap 0.25s ease;
        }

        .directory-item:hover .directory-action {
            color: var(--copper);
            gap: 10px;
        }

        .directory-arrow {
            display: inline-block;
        }

        /* ===== 最新信息 ===== */
        .latest-section {
            padding: 88px 0;
            background: var(--card-warm);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .latest-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .feature-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px;
            transition: box-shadow 0.3s ease, transform 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .feature-card:first-child {
            grid-column: 1 / -1;
        }

        .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
        }

        .card-date {
            font-size: 13px;
            color: var(--slate);
        }

        .feature-card h3 {
            font-size: 20px;
            line-height: 1.4;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .feature-card h3 a {
            background-image: none;
        }

        .feature-card h3 a:hover {
            color: var(--copper);
        }

        .feature-card p {
            color: var(--slate);
            font-size: 15px;
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--copper);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.25s ease;
        }

        .read-more:hover {
            gap: 8px;
        }

        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 24px;
            background: var(--card);
            border: 1px dashed var(--border);
            border-radius: var(--radius-card);
            color: var(--slate);
            font-size: 15px;
        }

        /* ===== 平台特色 ===== */
        .features-section {
            padding: 88px 0;
        }

        .features-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 860px;
            margin: 0 auto;
        }

        .feature-row {
            display: flex;
            align-items: flex-start;
            gap: 24px;
            padding: 28px 32px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            transition: box-shadow 0.3s ease;
        }

        .feature-row:hover {
            box-shadow: var(--shadow-md);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            color: var(--copper);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .feature-icon svg {
            width: 100%;
            height: 100%;
        }

        .feature-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .feature-content p {
            color: var(--slate);
            font-size: 15px;
            line-height: 1.6;
        }

        /* ===== 使用指南 ===== */
        .guide-section {
            padding: 88px 0;
            background: var(--ink);
            color: #FFFFFF;
        }

        .guide-section .section-title {
            color: #FFFFFF;
        }

        .guide-section .section-desc {
            color: rgba(255, 255, 255, 0.6);
        }

        .guide-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .guide-step {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 32px;
            position: relative;
            transition: background 0.3s ease, transform 0.3s ease;
        }

        .guide-step:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .step-number {
            font-size: 48px;
            font-weight: 800;
            font-family: "Helvetica Neue", Arial, sans-serif;
            color: var(--copper);
            line-height: 1;
            margin-bottom: 20px;
            display: block;
        }

        .guide-step h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .guide-step p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            line-height: 1.6;
        }

        /* ===== 延伸阅读 ===== */
        .recommend-section {
            padding: 88px 0;
        }

        .recommend-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .recommend-item {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px 28px;
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }

        .recommend-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateX(4px);
        }

        .recommend-num {
            font-size: 18px;
            font-weight: 700;
            font-family: "Helvetica Neue", Arial, sans-serif;
            color: var(--copper);
            flex-shrink: 0;
            min-width: 36px;
        }

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

        .recommend-info h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .recommend-info h4 a:hover {
            color: var(--copper);
        }

        .recommend-meta {
            font-size: 13px;
            color: var(--slate);
        }

        .recommend-tag {
            font-size: 13px;
            color: var(--slate);
            background: var(--bg);
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 88px 0;
            background: var(--card-warm);
            border-top: 1px solid var(--border);
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 17px;
            font-weight: 600;
            text-align: left;
            color: var(--ink);
            transition: color 0.2s ease;
            gap: 16px;
        }

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

        .faq-icon {
            position: relative;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: currentColor;
            transition: transform 0.3s ease;
        }

        .faq-icon::before {
            width: 20px;
            height: 2px;
            top: 9px;
            left: 0;
        }

        .faq-icon::after {
            width: 2px;
            height: 20px;
            left: 9px;
            top: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            color: var(--slate);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-answer-inner {
            padding: 0 0 24px;
            max-width: 90%;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }

        .faq-item.open .faq-question {
            color: var(--copper);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--ink);
            color: #FFFFFF;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-inner h2 {
            font-size: 28px;
            font-weight: 700;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.7);
            margin-top: 8px;
            font-size: 15px;
        }

        .cta-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--ink);
            color: #FFFFFF;
            padding: 64px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand .logo {
            font-size: 24px;
            color: #FFFFFF;
        }

        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            margin-top: 12px;
            line-height: 1.6;
            max-width: 320px;
        }

        .footer-form {
            display: flex;
            gap: 8px;
            margin-top: 20px;
            max-width: 360px;
        }

        .footer-form input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-input);
            background: rgba(255, 255, 255, 0.06);
            color: #FFFFFF;
            font-size: 14px;
            outline: none;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
            min-width: 0;
        }

        .footer-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-form input:focus {
            border-color: var(--copper);
            box-shadow: 0 0 0 3px rgba(192, 138, 62, 0.2);
        }

        .footer-form .btn {
            flex-shrink: 0;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: #FFFFFF;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.25s ease;
        }

        .footer-col ul a:hover {
            color: var(--copper);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Toast ===== */
        .toast-message {
            position: fixed;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%) translateY(20px);
            background: var(--ink);
            color: #FFFFFF;
            padding: 12px 24px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease, transform 0.3s ease;
            box-shadow: var(--shadow-md);
        }

        .toast-message.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 44px;
            }

            .guide-steps {
                gap: 16px;
            }

            .guide-step {
                padding: 24px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }

            .site-header {
                height: auto;
                padding: 12px 0;
            }

            .header-inner {
                gap: 12px;
            }

            .logo {
                font-size: 18px;
            }

            .main-nav {
                display: none;
                flex-basis: 100%;
                flex-direction: column;
                background: var(--bg);
                border-top: 1px solid var(--border);
                padding: 12px 0;
                margin-top: 8px;
                border-radius: 0 0 var(--radius-card) var(--radius-card);
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav .nav-link {
                padding: 12px 16px;
                border-radius: 8px;
                width: 100%;
            }

            .mobile-toggle {
                display: flex;
            }

            .header-cta {
                margin-left: auto;
            }

            .hero-section {
                min-height: 580px;
                height: auto;
                padding: 80px 0 60px;
            }

            .hero-title {
                font-size: 36px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-metrics {
                flex-wrap: wrap;
                gap: 24px;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 32px 0;
            }

            .stat-item {
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding: 16px;
            }

            .stat-item:last-child {
                border-bottom: none;
            }

            .latest-grid {
                grid-template-columns: 1fr;
            }

            .feature-card:first-child {
                grid-column: auto;
            }

            .guide-steps {
                grid-template-columns: 1fr;
            }

            .recommend-item {
                flex-wrap: wrap;
                gap: 12px;
            }

            .recommend-info {
                flex-basis: calc(100% - 60px);
            }

            .recommend-tag {
                margin-left: 60px;
            }

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

            .footer-brand {
                grid-column: 1 / -1;
            }

            .cta-inner {
                flex-direction: column;
                text-align: center;
            }

            .cta-buttons {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero-title {
                font-size: 30px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-metrics {
                flex-direction: column;
                gap: 16px;
            }

            .directory-item {
                flex-wrap: wrap;
                padding: 16px 20px;
                gap: 16px;
            }

            .directory-thumb {
                width: 100%;
                height: 120px;
            }

            .directory-index {
                min-width: 40px;
                font-size: 32px;
            }

            .directory-action {
                margin-left: auto;
            }

            .feature-card {
                padding: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-form {
                flex-direction: column;
            }

            .footer-form .btn {
                width: 100%;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.1s !important;
                transition-duration: 0.1s !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category1 */
:root {
            --c-primary: #1F2A34;
            --c-accent: #C08A3E;
            --c-accent-dark: #A8742E;
            --c-bg: #F4F1EC;
            --c-card: #FFFFFF;
            --c-text: #1F2A34;
            --c-muted: #6B7A86;
            --c-border: rgba(31, 42, 52, 0.08);
            --c-border-light: rgba(31, 42, 52, 0.05);
            --c-success: #3E7C4F;
            --c-warn: #B55D3C;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
            --font-num: "Inter", "Helvetica Neue", Arial, sans-serif;
            --radius-btn: 6px;
            --radius-card: 12px;
            --radius-input: 8px;
            --radius-tag: 999px;
            --shadow-sm: 0 1px 2px rgba(31, 42, 52, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 42, 52, 0.08);
            --container: 1280px;
            --space-section: 88px;
            --space-section-sm: 48px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--space-section) 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: 1px;
            color: var(--c-primary);
            margin-bottom: 12px;
        }
        .section-subtitle {
            color: var(--c-muted);
            font-size: 15px;
            max-width: 560px;
            margin: 0 auto;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(244, 241, 236, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: background .3s, border-color .3s, box-shadow .3s;
        }
        .site-header.scrolled {
            background: rgba(244, 241, 236, 0.95);
            border-bottom-color: var(--c-border);
            box-shadow: 0 4px 20px rgba(31, 42, 52, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--c-primary);
            letter-spacing: 1px;
            display: flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }
        .logo span {
            color: var(--c-accent);
            font-weight: 700;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            background: rgba(31, 42, 52, 0.04);
            padding: 4px;
            border-radius: var(--radius-tag);
        }
        .nav-link {
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--c-muted);
            border-radius: var(--radius-tag);
            transition: background .2s, color .2s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--c-primary);
            background: rgba(31, 42, 52, 0.06);
        }
        .nav-link.active {
            background: var(--c-card);
            color: var(--c-primary);
            box-shadow: var(--shadow-sm);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: background .2s, transform .15s, box-shadow .2s, border-color .2s;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--c-accent);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background: var(--c-accent-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }
        .btn-ghost {
            background: transparent;
            color: var(--c-primary);
            border: 2px solid var(--c-primary);
        }
        .btn-ghost:hover {
            background: rgba(31, 42, 52, 0.06);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            background: transparent;
            border-radius: var(--radius-btn);
            cursor: pointer;
            align-items: center;
        }
        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--c-primary);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            position: relative;
            min-height: 300px;
            max-height: 320px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--c-primary);
            margin-top: 72px;
        }
        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 40%;
            opacity: 0.45;
        }
        .category-hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(31, 42, 52, 0.72) 20%, rgba(31, 42, 52, 0.35) 100%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .breadcrumb {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.72);
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            margin: 0 8px;
            opacity: 0.6;
        }
        .hero-title {
            font-size: 38px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }
        .hero-subtitle {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.88);
            max-width: 600px;
            line-height: 1.6;
        }
        .hero-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
        }
        .hero-meta .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--c-accent);
        }

        /* ===== 分类说明区 ===== */
        .category-intro {
            padding: var(--space-section) 0 var(--space-section-sm);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }
        .intro-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--c-accent);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .intro-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--c-primary);
            line-height: 1.4;
            margin-bottom: 16px;
        }
        .intro-text p {
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .intro-text p:last-child {
            margin-bottom: 0;
        }
        .intro-img-wrap {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }
        .intro-img-wrap img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .intro-img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(31, 42, 52, 0.18), transparent);
        }

        /* ===== 分类聚合列表 ===== */
        .guide-section {
            padding: 0 0 var(--space-section);
        }
        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .guide-item {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--c-card);
            border: 1px solid var(--c-border-light);
            border-radius: var(--radius-card);
            padding: 24px 32px;
            transition: box-shadow .3s, transform .3s, border-color .3s;
        }
        .guide-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(192, 138, 62, 0.35);
        }
        .guide-num {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--c-accent);
            min-width: 48px;
            letter-spacing: 1px;
        }
        .guide-info {
            flex: 1;
        }
        .guide-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-primary);
            margin-bottom: 4px;
        }
        .guide-desc {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.6;
        }
        .guide-arrow {
            font-size: 18px;
            color: var(--c-muted);
            transition: transform .3s, color .3s;
            flex-shrink: 0;
        }
        .guide-item:hover .guide-arrow {
            transform: translateX(6px);
            color: var(--c-accent);
        }

        /* ===== 最近更新 ===== */
        .latest-section {
            padding: var(--space-section-sm) 0;
            background: #EDE9E1;
        }
        .latest-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .latest-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 20px 0;
            border-bottom: 1px solid var(--c-border);
        }
        .latest-item:last-child {
            border-bottom: none;
        }
        .latest-info {
            flex: 1;
        }
        .latest-tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(192, 138, 62, 0.12);
            color: var(--c-accent-dark);
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-tag);
            margin-bottom: 6px;
        }
        .latest-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--c-primary);
            transition: color .2s;
        }
        .latest-title:hover {
            color: var(--c-accent);
        }
        .latest-date {
            font-size: 13px;
            color: var(--c-muted);
            white-space: nowrap;
            font-family: var(--font-num);
            color: var(--c-muted);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--space-section) 0;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid rgba(107, 122, 134, 0.2);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            width: 100%;
            padding: 24px 4px;
            font-size: 16px;
            font-weight: 600;
            color: var(--c-primary);
            cursor: pointer;
            background: transparent;
            text-align: left;
            transition: color .2s;
        }
        .faq-question:hover {
            color: var(--c-accent);
        }
        .faq-icon {
            position: relative;
            width: 16px;
            height: 16px;
            flex-shrink: 0;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--c-muted);
            border-radius: 2px;
            transition: transform .3s, background .3s;
        }
        .faq-icon::before {
            width: 16px;
            height: 2px;
            top: 7px;
            left: 0;
        }
        .faq-icon::after {
            width: 2px;
            height: 16px;
            left: 7px;
            top: 0;
        }
        .faq-item.open .faq-icon::before {
            background: var(--c-accent);
        }
        .faq-item.open .faq-icon::after {
            transform: rotate(90deg);
            background: var(--c-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .3s;
            padding: 0 4px;
            font-size: 15px;
            color: var(--c-muted);
            line-height: 1.75;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 0 0 var(--space-section);
        }
        .cta-inner {
            background: var(--c-primary);
            border-radius: 16px;
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(192, 138, 62, 0.18);
        }
        .cta-title {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 6px;
        }
        .cta-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 420px;
        }
        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ===== 返回按钮 ===== */
        .back-section {
            padding-bottom: 64px;
            text-align: center;
        }
        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--c-muted);
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--c-border);
            transition: color .2s, border-color .2s, background .2s;
        }
        .back-link:hover {
            color: var(--c-primary);
            border-color: var(--c-primary);
            background: rgba(31, 42, 52, 0.04);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--c-primary);
            color: rgba(255, 255, 255, 0.72);
            padding: 64px 0 0;
            font-size: 14px;
        }
        .site-footer .logo {
            color: #fff;
            font-size: 24px;
            margin-bottom: 12px;
        }
        .site-footer .logo span {
            color: var(--c-accent);
        }
        .site-footer p {
            max-width: 380px;
            line-height: 1.7;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-form {
            display: flex;
            gap: 8px;
            margin-top: 12px;
            max-width: 360px;
        }
        .footer-form input {
            flex: 1;
            padding: 10px 14px;
            border-radius: var(--radius-input);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 14px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: border-color .2s, background .2s;
        }
        .footer-form input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-form input:focus {
            border-color: var(--c-accent);
            background: rgba(255, 255, 255, 0.12);
        }
        .footer-form .btn {
            background: var(--c-accent);
            color: #fff;
        }
        .footer-form .btn:hover {
            background: var(--c-accent-dark);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            transition: color .2s;
        }
        .footer-col a:hover {
            color: var(--c-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Toast ===== */
        #toast {
            position: fixed;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%) translateY(20px);
            background: var(--c-primary);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            opacity: 0;
            pointer-events: none;
            transition: opacity .3s, transform .3s;
            z-index: 9999;
            box-shadow: var(--shadow-md);
        }
        #toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }

        /* ===== 动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(12px);
            animation: fadeUp .6s ease-out forwards;
        }
        .fade-up.d1 {
            animation-delay: .1s;
        }
        .fade-up.d2 {
            animation-delay: .2s;
        }
        .fade-up.d3 {
            animation-delay: .3s;
        }
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                gap: 2px;
            }
            .nav-link {
                padding: 6px 14px;
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-inner {
                padding: 36px 28px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 56px 0;
            }
            .header-inner {
                height: 60px;
            }
            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: var(--c-bg);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px;
                border-bottom: 1px solid var(--c-border);
                box-shadow: 0 20px 40px rgba(31, 42, 52, 0.08);
                border-radius: 0 0 12px 12px;
                transform: translateY(-120%);
                transition: transform .3s ease;
                z-index: 99;
                display: flex;
                gap: 6px;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 8px;
                text-align: center;
            }
            .nav-toggle {
                display: flex;
            }
            .header-actions .btn-sm {
                display: none;
            }
            .category-hero {
                min-height: 240px;
                margin-top: 60px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-subtitle {
                font-size: 14px;
            }
            .intro-title {
                font-size: 22px;
            }
            .guide-item {
                padding: 20px;
                gap: 16px;
                flex-wrap: wrap;
            }
            .guide-num {
                min-width: 32px;
                font-size: 16px;
            }
            .guide-arrow {
                display: none;
            }
            .latest-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .latest-date {
                font-size: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .footer-form {
                max-width: 100%;
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
                padding: 32px 20px;
            }
            .cta-actions {
                justify-content: center;
            }
            .back-section {
                padding-bottom: 40px;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 24px;
            }
            .hero-title {
                font-size: 24px;
            }
            .hero-meta {
                flex-wrap: wrap;
            }
            .guide-title {
                font-size: 16px;
            }
            .guide-desc {
                font-size: 13px;
            }
            .faq-question {
                font-size: 15px;
                padding: 20px 0;
            }
            .cta-title {
                font-size: 20px;
            }
            .btn {
                padding: 8px 16px;
                font-size: 13px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: .01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1F2A34;
            --color-primary-light: #2A3A47;
            --color-accent: #C08A3E;
            --color-accent-dark: #A8742F;
            --color-bg: #F4F1EC;
            --color-bg-light: #FCFCFA;
            --color-card: #FFFFFF;
            --color-muted: #6B7A86;
            --color-border: rgba(31, 42, 52, 0.08);
            --color-line: rgba(31, 42, 52, 0.14);
            --color-white: #FFFFFF;
            --color-success: #3E7C4F;
            --color-warning: #B55D3C;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "Helvetica Neue", sans-serif;
            --radius-btn: 6px;
            --radius-card: 12px;
            --radius-input: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 2px rgba(31, 42, 52, 0.04);
            --shadow-hover: 0 8px 24px rgba(31, 42, 52, 0.08);
            --shadow-nav: 0 4px 20px rgba(31, 42, 52, 0.07);
            --container-max: 1280px;
            --gutter: 24px;
            --transition: 0.2s ease;
        }

        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-primary);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button {
            cursor: pointer;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--gutter);
            padding-right: var(--gutter);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 2px solid transparent;
            transition: background 0.25s, transform 0.2s, box-shadow 0.25s, border-color 0.25s;
        }

        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--color-accent);
            color: var(--color-white);
        }

        .btn-primary:hover {
            background: var(--color-accent-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(192, 138, 62, 0.28);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }

        .btn-outline:hover {
            background: rgba(31, 42, 52, 0.05);
            border-color: var(--color-accent);
            color: var(--color-accent-dark);
        }

        .btn-ghost {
            background: rgba(31, 42, 52, 0.05);
            color: var(--color-primary);
        }

        .btn-ghost:hover {
            background: rgba(31, 42, 52, 0.1);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.7);
            color: var(--color-white);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--color-white);
            color: var(--color-white);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(244, 241, 236, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            transition: background 0.3s, box-shadow 0.3s;
        }

        .site-header.scrolled {
            background: rgba(244, 241, 236, 0.96);
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 20px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--color-primary);
            flex-shrink: 0;
        }

        .logo span {
            color: var(--color-accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 18px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-muted);
            white-space: nowrap;
            transition: background 0.2s, color 0.2s;
        }

        .nav-link:hover {
            color: var(--color-primary);
            background: rgba(31, 42, 52, 0.05);
        }

        .nav-link.active {
            background: var(--color-primary);
            color: var(--color-white);
            font-weight: 600;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-cta {
            padding: 9px 18px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        .article-hero {
            position: relative;
            padding: 56px 0 64px;
            background: linear-gradient(135deg, #1F2A34 0%, #2A3A47 60%, #364a58 100%);
            color: var(--color-white);
            overflow: hidden;
        }

        .article-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.16;
        }

        .article-hero::after {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(192, 138, 62, 0.18) 0%, transparent 65%);
            pointer-events: none;
        }

        .article-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }

        .breadcrumb a:hover {
            color: var(--color-accent);
        }

        .breadcrumb .sep {
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: rgba(255, 255, 255, 0.92);
        }

        .article-hero-title {
            font-size: clamp(28px, 4.2vw, 40px);
            font-weight: 700;
            line-height: 1.35;
            max-width: 840px;
            letter-spacing: 0.5px;
            margin-bottom: 22px;
        }

        .article-hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            line-height: 1.7;
        }

        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            margin-top: 24px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        .meta-chip {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            background: rgba(192, 138, 62, 0.2);
            border: 1px solid rgba(192, 138, 62, 0.4);
            border-radius: var(--radius-pill);
            color: #E4B570;
            font-size: 13px;
            font-weight: 600;
        }

        .meta-date,
        .meta-read {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-date::before {
            content: "";
            width: 4px;
            height: 4px;
            background: var(--color-accent);
            border-radius: 50%;
        }

        .article-body-section {
            padding: 48px 0 20px;
        }

        .article-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            max-width: 860px;
            margin: 0 auto;
            overflow: hidden;
            animation: fadeInUp 0.55s ease-out both;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .article-feature {
            aspect-ratio: 16 / 7;
            overflow: hidden;
            background: var(--color-bg);
        }

        .article-feature img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .article-card:hover .article-feature img {
            transform: scale(1.02);
        }

        .article-content {
            padding: 40px 48px 8px;
            font-size: 16.5px;
            line-height: 1.8;
            color: #2A3640;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin: 42px 0 16px;
            color: var(--color-primary);
            letter-spacing: 0.3px;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 650;
            margin: 34px 0 12px;
            color: var(--color-primary);
        }

        .article-content p {
            margin-bottom: 24px;
        }

        .article-content a {
            color: var(--color-accent-dark);
            border-bottom: 1px solid rgba(192, 138, 62, 0.4);
        }

        .article-content a:hover {
            border-color: var(--color-accent-dark);
        }

        .article-content ul,
        .article-content ol {
            padding-left: 26px;
            margin-bottom: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content ul li::marker {
            color: var(--color-accent);
        }

        .article-content blockquote {
            border-left: 3px solid var(--color-accent);
            background: var(--color-bg);
            padding: 18px 24px;
            margin: 28px 0;
            border-radius: 0 10px 10px 0;
            color: var(--color-muted);
            font-size: 15.5px;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0 32px;
            font-size: 15px;
        }

        .article-content table th {
            background: var(--color-primary);
            color: var(--color-white);
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }

        .article-content table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--color-border);
        }

        .article-content table tr:nth-child(even) {
            background: var(--color-bg-light);
        }

        .article-content code {
            background: rgba(31, 42, 52, 0.06);
            padding: 3px 8px;
            border-radius: 4px;
            font-size: 14px;
            font-family: var(--font-num);
            color: var(--color-primary);
        }

        .article-content pre {
            background: var(--color-primary);
            color: #EDEAE4;
            padding: 20px 24px;
            border-radius: 8px;
            overflow-x: auto;
            margin-bottom: 24px;
            line-height: 1.6;
            font-size: 14px;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
            font-family: var(--font-num);
        }

        .article-content img {
            border-radius: 8px;
            margin: 28px 0;
        }

        .article-end {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 20px 48px 36px;
            flex-wrap: wrap;
            border-top: 1px solid var(--color-border);
            margin-top: 24px;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            background: rgba(192, 138, 62, 0.1);
            color: var(--color-accent-dark);
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            transition: background 0.2s, color 0.2s;
        }

        .tag:hover {
            background: var(--color-accent);
            color: var(--color-white);
        }

        .article-share {
            display: flex;
            gap: 10px;
        }

        .article-share .btn {
            padding: 8px 16px;
            font-size: 13px;
        }

        .prev-next-grid {
            max-width: 860px;
            margin: 28px auto 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .pn-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
        }

        .pn-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(192, 138, 62, 0.35);
        }

        .pn-next {
            text-align: right;
        }

        .pn-arrow {
            font-size: 22px;
            font-weight: 300;
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .pn-text {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 0;
        }

        .pn-label {
            font-size: 12px;
            color: var(--color-muted);
            letter-spacing: 1px;
        }

        .pn-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .related-section {
            max-width: 860px;
            margin: 40px auto 0;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px 40px 12px;
        }

        .related-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
        }

        .related-list {
            display: flex;
            flex-direction: column;
        }

        .related-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 4px;
            border-bottom: 1px solid var(--color-border);
            transition: background 0.2s, padding-left 0.2s;
        }

        .related-item:last-child {
            border-bottom: none;
        }

        .related-item:hover {
            background: var(--color-bg-light);
            padding-left: 12px;
        }

        .related-num {
            font-family: var(--font-num);
            font-size: 14px;
            font-weight: 700;
            color: var(--color-accent);
            flex-shrink: 0;
            width: 28px;
        }

        .related-body {
            display: flex;
            flex-direction: column;
            gap: 4px;
            min-width: 0;
            flex: 1;
        }

        .related-name {
            font-size: 12px;
            color: var(--color-muted);
        }

        .related-heading {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .related-arrow {
            color: var(--color-muted);
            font-size: 18px;
            flex-shrink: 0;
            transition: color 0.2s, transform 0.2s;
        }

        .related-item:hover .related-arrow {
            color: var(--color-accent);
            transform: translateX(3px);
        }

        .empty-state {
            max-width: 620px;
            margin: 0 auto;
            text-align: center;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 72px 40px;
            box-shadow: var(--shadow-card);
            animation: fadeInUp 0.5s ease-out both;
        }

        .empty-code {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: rgba(192, 138, 62, 0.1);
            color: var(--color-accent);
            font-family: var(--font-num);
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .empty-state h2 {
            font-size: 24px;
            margin-bottom: 12px;
            color: var(--color-primary);
        }

        .empty-state p {
            color: var(--color-muted);
            margin-bottom: 28px;
            font-size: 16px;
        }

        .cta-section {
            padding: 56px 0 80px;
        }

        .cta-card {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 44px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            color: var(--color-white);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(192, 138, 62, 0.2) 0%, transparent 65%);
        }

        .cta-info {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 300px;
        }

        .cta-info h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .cta-info p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.7;
            max-width: 520px;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }

        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
            font-size: 15px;
        }

        .site-footer a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s;
        }

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

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 44px;
        }

        .footer-brand .logo {
            color: var(--color-white);
            font-size: 24px;
            margin-bottom: 14px;
        }

        .footer-brand .logo span {
            color: var(--color-accent);
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 22px;
            max-width: 300px;
            line-height: 1.7;
        }

        .footer-form {
            display: flex;
            gap: 10px;
            max-width: 340px;
        }

        .footer-form input {
            flex: 1;
            min-width: 0;
            height: 42px;
            padding: 0 14px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-input);
            color: var(--color-white);
            font-size: 14px;
            outline: none;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .footer-form input::placeholder {
            color: rgba(255, 255, 255, 0.35);
        }

        .footer-form input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(192, 138, 62, 0.15);
        }

        .footer-form .btn {
            height: 42px;
            padding: 0 18px;
            font-size: 14px;
        }

        .footer-col h4 {
            color: var(--color-white);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col ul a:hover {
            color: var(--color-accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 22px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        .toast {
            position: fixed;
            left: 50%;
            bottom: 40px;
            transform: translateX(-50%) translateY(20px);
            background: var(--color-primary);
            color: var(--color-white);
            padding: 12px 28px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            box-shadow: var(--shadow-hover);
            z-index: 9999;
            opacity: 0;
            transition: opacity 0.3s, transform 0.3s;
            pointer-events: none;
        }

        .toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: span 3;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }

            .logo {
                font-size: 19px;
            }

            .main-nav {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(244, 241, 236, 0.97);
                border-bottom: 1px solid var(--color-border);
                padding: 14px 20px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: transform 0.35s ease, opacity 0.35s ease, visibility 0.35s;
                z-index: 99;
                box-shadow: var(--shadow-nav);
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-link {
                height: 44px;
                justify-content: flex-start;
                padding: 0 16px;
                border-radius: 8px;
                font-size: 15px;
            }

            .nav-link.active {
                background: var(--color-primary);
            }

            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
            }

            .article-hero {
                padding: 40px 0 48px;
            }

            .article-hero-title {
                font-size: 28px;
            }

            .article-content {
                padding: 28px 24px 8px;
            }

            .article-end {
                padding: 16px 24px 28px;
            }

            .prev-next-grid {
                grid-template-columns: 1fr;
                margin-top: 20px;
            }

            .article-card {
                max-width: 100%;
            }

            .related-section {
                margin-top: 24px;
                padding: 24px 20px 8px;
            }

            .cta-card {
                padding: 32px 24px;
            }

            .cta-actions {
                width: 100%;
            }

            .cta-actions .btn {
                flex: 1;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: auto;
            }

            .footer-col ul {
                flex-direction: column;
                gap: 8px;
            }

            .empty-state {
                padding: 50px 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-hero-title {
                font-size: 24px;
            }

            .breadcrumb {
                font-size: 13px;
                gap: 6px;
            }

            .article-hero-meta {
                gap: 10px;
                font-size: 13px;
            }

            .article-content {
                font-size: 15.5px;
                line-height: 1.75;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-content h3 {
                font-size: 18px;
            }

            .article-end {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-share {
                width: 100%;
            }

            .article-share .btn {
                flex: 1;
                justify-content: center;
            }

            .empty-state h2 {
                font-size: 22px;
            }

            .empty-state p {
                font-size: 15px;
            }

            .cta-info h2 {
                font-size: 20px;
            }

            .cta-actions {
                flex-direction: column;
            }

            .footer-form {
                flex-direction: column;
                gap: 10px;
            }

            .footer-form .btn {
                width: 100%;
            }
        }