/* roulang page: index */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 80px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-serif);
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
        }

        h1 {
            font-size: clamp(28px, 4.5vw, 46px);
            letter-spacing: 0.01em;
        }

        h2 {
            font-size: clamp(22px, 2.8vw, 30px);
            letter-spacing: 0.02em;
        }

        h3 {
            font-size: clamp(17px, 1.6vw, 20px);
            font-weight: 600;
        }

        code,
        pre,
        .mono {
            font-family: var(--font-mono);
            font-size: 13.5px;
            letter-spacing: 0.02em;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航系统 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }

        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }

        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }

        .nav-search:focus-within {
            border-color: var(--accent);
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--text-secondary);
        }

        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }

        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
            border-top: 1px solid rgba(200, 155, 60, 0.12);
            white-space: nowrap;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border-accent);
            background: transparent;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: all 0.25s ease;
            flex-shrink: 0;
        }

        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }

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

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 60px 0 80px;
            overflow: hidden;
            background-color: var(--bg-primary);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at top right, rgba(200, 155, 60, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at bottom left, rgba(139, 58, 42, 0.08) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero-grid {
            position: relative;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border: 1px solid var(--cinnabar);
            border-radius: var(--radius-sm);
            color: var(--cinnabar);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            margin-bottom: 18px;
            background-color: rgba(139, 58, 42, 0.08);
        }

        .hero-badge .dot {
            display: inline-block;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--cinnabar);
            animation: pulse-dot 1.6s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.3;
            }
        }

        .hero-title {
            margin-bottom: 14px;
        }

        .hero-title .highlight {
            color: var(--accent);
            position: relative;
        }

        .hero-subtitle {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 22px;
            max-width: 520px;
        }

        .hero-trust {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .hero-trust .seal {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border: 1px solid var(--cinnabar);
            border-radius: var(--radius-sm);
            color: var(--cinnabar);
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.04em;
            background: transparent;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease, box-shadow 0.2s ease;
            box-shadow: 0 2px 8px rgba(200, 155, 60, 0.3);
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(200, 155, 60, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            background-color: #b8902f;
            box-shadow: 0 2px 6px rgba(200, 155, 60, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: var(--radius-md);
            background: transparent;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            border: 1px solid var(--accent);
            transition: background-color 0.25s ease, color 0.25s ease, transform 0.2s ease;
        }

        .btn-secondary:hover {
            background-color: rgba(200, 155, 60, 0.1);
            color: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
        }

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

        .hero-panel {
            position: relative;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-light);
        }

        .hero-panel .panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border-accent);
            margin-bottom: 18px;
        }

        .hero-panel .panel-title {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--accent);
            letter-spacing: 0.05em;
            font-weight: 600;
        }

        .hero-panel .panel-dots {
            display: flex;
            gap: 6px;
        }

        .hero-panel .panel-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--border-accent);
        }

        .hero-panel .panel-dots span:first-child {
            background-color: var(--cinnabar);
        }

        .hero-panel .metric-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }

        .hero-panel .metric-item {
            padding: 14px;
            background-color: rgba(237, 230, 214, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(200, 155, 60, 0.1);
        }

        .hero-panel .metric-value {
            font-family: var(--font-mono);
            font-size: 22px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 4px;
        }

        .hero-panel .metric-label {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .hero-scroll-hint {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            color: var(--text-secondary);
            font-size: 12px;
            letter-spacing: 0.06em;
            display: flex;
            align-items: center;
            gap: 8px;
            z-index: 1;
        }

        .hero-scroll-hint .arrow {
            animation: bounce-down 1.8s ease-in-out infinite;
        }

        @keyframes bounce-down {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(6px);
            }
        }

        /* ===== 资讯动态模块 ===== */
        .news-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
            border-top: 1px solid rgba(200, 155, 60, 0.1);
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-tag {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--cinnabar);
            letter-spacing: 0.08em;
            margin-bottom: 10px;
            text-transform: uppercase;
            border-bottom: 2px solid var(--cinnabar);
            padding-bottom: 3px;
        }

        .section-title {
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
        }

        .news-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 32px;
            align-items: start;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .news-item {
            display: flex;
            flex-direction: column;
            padding: 20px 24px;
            border-bottom: 1px solid var(--border-accent);
            transition: background-color 0.25s ease;
            cursor: pointer;
        }

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

        .news-item:hover {
            background-color: rgba(200, 155, 60, 0.05);
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 6px;
        }

        .news-item .news-date {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--accent);
            letter-spacing: 0.05em;
        }

        .news-item .news-tag {
            font-size: 11px;
            padding: 2px 8px;
            border-radius: 999px;
            background-color: rgba(139, 58, 42, 0.15);
            color: var(--cinnabar);
            letter-spacing: 0.04em;
        }

        .news-item .news-title {
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            transition: color 0.25s ease;
        }

        .news-item:hover .news-title {
            color: var(--accent);
        }

        .news-item .news-summary {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .rank-box {
            background-color: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 20px;
        }

        .rank-box .rank-title {
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-accent);
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(200, 155, 60, 0.1);
        }

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

        .rank-item .rank-num {
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--cinnabar);
            width: 28px;
            flex-shrink: 0;
        }

        .rank-item .rank-name {
            font-size: 13px;
            color: var(--text-primary);
            flex: 1;
        }

        .rank-item .rank-value {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--accent);
            white-space: nowrap;
        }

        /* ===== 保障图标条 ===== */
        .guarantee-section {
            padding: 32px 0;
            background-color: rgba(237, 230, 214, 0.04);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            align-items: center;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            transition: background-color 0.25s ease;
        }

        .guarantee-item:hover {
            background-color: rgba(200, 155, 60, 0.06);
        }

        .guarantee-item .guarantee-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--accent);
            border-radius: 50%;
            color: var(--accent);
            font-size: 16px;
            flex-shrink: 0;
        }

        .guarantee-item .guarantee-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ===== 核心模块 ===== */
        .core-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

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

        .core-card {
            background-color: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
        }

        .core-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .core-card .card-image {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background-color: var(--bg-code);
        }

        .core-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .core-card:hover .card-image img {
            transform: scale(1.04);
        }

        .core-card .card-body {
            padding: 20px 22px;
        }

        .core-card .card-num {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--cinnabar);
            letter-spacing: 0.08em;
            margin-bottom: 8px;
            border-bottom: 2px solid var(--cinnabar);
            display: inline-block;
            padding-bottom: 2px;
        }

        .core-card .card-title {
            font-family: var(--font-serif);
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .core-card .card-desc {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 优势数据带 ===== */
        .stats-section {
            padding: 52px 0;
            background-color: var(--bg-code);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item .stat-value {
            font-family: var(--font-mono);
            font-size: 38px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .stat-item .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
        }

        /* ===== 案例场景 ===== */
        .cases-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

        .case-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 48px;
        }

        .case-row:last-child {
            margin-bottom: 0;
        }

        .case-row.reversed .case-image {
            order: 2;
        }

        .case-row.reversed .case-text {
            order: 1;
        }

        .case-image {
            aspect-ratio: 16/10;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-accent);
            background-color: var(--bg-code);
        }

        .case-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-text .case-tag {
            font-size: 12px;
            color: var(--cinnabar);
            font-family: var(--font-mono);
            letter-spacing: 0.06em;
            margin-bottom: 8px;
        }

        .case-text .case-title {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .case-text .case-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .case-text .case-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.25s ease;
        }

        .case-text .case-link:hover {
            color: var(--accent-hover);
            text-decoration: underline;
        }

        /* ===== 品牌介绍 ===== */
        .brand-section {
            padding: var(--section-pad) 0;
            background-color: rgba(237, 230, 214, 0.04);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .brand-content {
            max-width: 820px;
            margin: 0 auto;
            text-align: center;
        }

        .brand-content .brand-text {
            font-size: 15.5px;
            color: var(--text-secondary);
            line-height: 2;
            text-align: justify;
        }

        /* ===== 方案定价 ===== */
        .pricing-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

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

        .price-card {
            background-color: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
        }

        .price-card:hover {
            border-color: var(--accent);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .price-card.featured {
            border-color: var(--accent);
            border-width: 2px;
            box-shadow: 0 0 20px rgba(200, 155, 60, 0.15);
        }

        .price-card .plan-name {
            font-family: var(--font-serif);
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .price-card .plan-price {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 6px;
        }

        .price-card .plan-period {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .price-card .plan-features {
            list-style: none;
            margin: 18px 0;
            padding: 0;
        }

        .price-card .plan-features li {
            font-size: 13.5px;
            color: var(--text-secondary);
            padding: 7px 0;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px solid rgba(200, 155, 60, 0.08);
        }

        .price-card .plan-features li:last-child {
            border-bottom: none;
        }

        .price-card .plan-features li .check {
            color: var(--accent);
            font-size: 13px;
            flex-shrink: 0;
        }

        .price-card .btn-primary {
            width: 100%;
            justify-content: center;
        }

        /* ===== 用户评价 ===== */
        .reviews-section {
            padding: var(--section-pad) 0;
            background-color: rgba(237, 230, 214, 0.04);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background-color: var(--bg-primary);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: border-color 0.25s ease, transform 0.25s ease;
        }

        .review-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .review-card .review-stars {
            color: var(--accent);
            font-size: 13px;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }

        .review-card .review-text {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .review-card .review-author {
            font-size: 12px;
            color: var(--accent);
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
        }

        /* ===== 合作伙伴标签 ===== */
        .partners-section {
            padding: 56px 0;
            background-color: var(--bg-primary);
        }

        .partners-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .partner-tag {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 18px;
            background-color: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            transition: border-color 0.25s ease, background-color 0.25s ease;
        }

        .partner-tag:hover {
            border-color: var(--accent);
            background-color: rgba(200, 155, 60, 0.06);
        }

        .partner-tag .partner-icon {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background-color: rgba(200, 155, 60, 0.12);
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
        }

        .partner-tag .partner-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .partner-tag .partner-desc {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--section-pad) 0;
            background-color: rgba(237, 230, 214, 0.04);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .faq-list {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            overflow: hidden;
            background-color: rgba(237, 230, 214, 0.02);
        }

        .faq-item {
            border-bottom: 1px solid var(--border-accent);
            transition: background-color 0.25s ease;
        }

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

        .faq-item:hover {
            background-color: rgba(200, 155, 60, 0.04);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            cursor: pointer;
            user-select: none;
            transition: color 0.25s ease;
        }

        .faq-question .faq-q-text {
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color 0.25s ease;
        }

        .faq-question .faq-icon {
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-item.active .faq-q-text {
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== CTA横幅 ===== */
        .cta-section {
            padding: 64px 0;
            background-color: var(--bg-primary);
        }

        .cta-banner {
            background-color: var(--accent);
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 120px;
            height: 120px;
            border: 2px solid rgba(28, 25, 23, 0.2);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner .cta-title {
            font-family: var(--font-serif);
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
        }

        .cta-banner .cta-desc {
            font-size: 14px;
            color: rgba(28, 25, 23, 0.7);
            position: relative;
            z-index: 1;
        }

        .btn-dark {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-md);
            background-color: var(--text-dark);
            color: var(--paper);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
            position: relative;
            z-index: 1;
            white-space: nowrap;
        }

        .btn-dark:hover {
            background-color: #2d2823;
            color: var(--paper);
            transform: translateY(-2px);
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 32px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-serif);
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }

        .footer-brand .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-col .footer-heading {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.06em;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }

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

        .footer-subscribe .subscribe-form {
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
        }

        .footer-subscribe .subscribe-form input {
            flex: 1;
            padding: 8px 14px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-accent);
            background-color: var(--bg-code);
            color: var(--text-primary);
            font-size: 13px;
            font-family: var(--font-sans);
            outline: none;
            transition: border-color 0.25s ease;
        }

        .footer-subscribe .subscribe-form input:focus {
            border-color: var(--accent);
        }

        .footer-subscribe .subscribe-form button {
            padding: 8px 16px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 13px;
            white-space: nowrap;
            transition: background-color 0.25s ease;
        }

        .footer-subscribe .subscribe-form button:hover {
            background-color: var(--accent-hover);
        }

        .footer-subscribe .subscribe-note {
            font-size: 11px;
            color: var(--text-secondary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(200, 155, 60, 0.12);
            padding: 18px 0 24px;
            text-align: center;
        }

        .footer-bottom .copyright {
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .footer-bottom .beian {
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .footer-bottom .footer-links {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .footer-bottom .footer-links a {
            color: var(--text-secondary);
            font-size: 12px;
            transition: color 0.25s ease;
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 56px;
            }

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

            .core-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }

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

            .case-row.reversed .case-image {
                order: 1;
            }

            .case-row.reversed .case-text {
                order: 2;
            }

            .pricing-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .news-layout {
                grid-template-columns: 1fr;
            }

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

        @media (max-width: 768px) {
            :root {
                --section-pad: 40px;
                --nav-height: 56px;
                --tabs-height: 40px;
            }

            .nav-top {
                height: var(--nav-height);
                gap: 10px;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-logo .logo-mark {
                width: 24px;
                height: 24px;
                font-size: 12px;
            }

            .nav-search input {
                width: 0;
                opacity: 0;
                padding: 0;
                transition: width 0.3s ease, opacity 0.3s ease;
            }

            .nav-search.expanded input {
                width: 110px;
                opacity: 1;
                padding-left: 4px;
            }

            .nav-cta {
                padding: 6px 14px;
                font-size: 13px;
            }

            .nav-tabs {
                height: var(--tabs-height);
                gap: 6px;
            }

            .nav-tab {
                padding: 5px 12px;
                font-size: 12px;
            }

            .hero-section {
                padding: 40px 0 56px;
            }

            .hero-panel {
                padding: 20px 16px;
            }

            .hero-panel .metric-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .hero-panel .metric-value {
                font-size: 18px;
            }

            .hero-scroll-hint {
                display: none;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .stat-item .stat-value {
                font-size: 28px;
            }

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

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

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

            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .cta-banner {
                padding: 28px 24px;
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }

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

            .footer-bottom {
                text-align: left;
                padding: 14px 0 20px;
            }
        }

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

            h1 {
                font-size: 26px;
            }

            h2 {
                font-size: 21px;
            }

            .hero-desc {
                font-size: 13.5px;
            }

            .hero-trust .seal {
                font-size: 11px;
                padding: 5px 10px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .btn-primary,
            .btn-secondary {
                justify-content: center;
                width: 100%;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }

            .stat-item .stat-value {
                font-size: 24px;
            }

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

            .news-item {
                padding: 14px 16px;
            }

            .news-item .news-summary {
                font-size: 12.5px;
            }

            .faq-question {
                padding: 14px 16px;
            }

            .faq-question .faq-q-text {
                font-size: 14px;
            }

            .faq-answer {
                padding: 0 16px;
            }

            .faq-item.active .faq-answer {
                padding-bottom: 14px;
            }

            .brand-content .brand-text {
                font-size: 14px;
            }

            .cta-banner {
                padding: 22px 18px;
                border-radius: var(--radius-md);
            }

            .cta-banner .cta-title {
                font-size: 20px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 80px;
        }

        @media (max-width: 1024px) {
            :root {
                --section-pad: 56px;
            }
        }

        @media (max-width: 480px) {
            :root {
                --section-pad: 40px;
                --nav-height: 56px;
                --tabs-height: 40px;
            }
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航系统 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }

        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }

        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }

        .nav-search:focus-within {
            border-color: var(--accent);
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--text-secondary);
        }

        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }

        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            flex-shrink: 0;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border-accent);
            transition: all 0.25s ease;
            letter-spacing: 0.03em;
        }

        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }

        /* ===== Hero ===== */
        .doc-hero {
            padding: 48px 0;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
            position: relative;
        }

        .doc-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(200, 155, 60, 0.06) 0%, transparent 65%);
            pointer-events: none;
        }

        .doc-hero .container {
            position: relative;
            z-index: 1;
        }

        .doc-hero-grid {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 40px;
            align-items: center;
        }

        .doc-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border: 1px solid var(--cinnabar);
            border-radius: 999px;
            font-size: 12px;
            color: var(--cinnabar);
            font-weight: 600;
            letter-spacing: 0.06em;
            margin-bottom: 16px;
        }

        .doc-hero h1 {
            font-family: var(--font-serif);
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .doc-hero h1 .accent-word {
            color: var(--accent);
        }

        .doc-hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 24px;
            max-width: 560px;
        }

        .doc-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-md);
            transition: background-color 0.25s ease, transform 0.2s ease;
            letter-spacing: 0.03em;
        }

        .btn-primary:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        .btn-secondary-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background: transparent;
            color: var(--accent);
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-md);
            border: 1px solid var(--accent);
            transition: background-color 0.25s ease, color 0.25s ease;
            letter-spacing: 0.03em;
        }

        .btn-secondary-outline:hover {
            background-color: rgba(200, 155, 60, 0.1);
            color: var(--accent-hover);
        }

        .doc-hero-toc-summary {
            background: rgba(28, 25, 23, 0.7);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            max-width: 520px;
        }

        .doc-hero-toc-summary .toc-summary-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 8px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .doc-hero-toc-summary ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 6px 16px;
        }

        .doc-hero-toc-summary ul li {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .doc-hero-toc-summary ul li::before {
            content: '\f105';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--accent);
            font-size: 11px;
        }

        .doc-hero-cover {
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-accent);
            overflow: hidden;
            box-shadow: var(--shadow-light);
            aspect-ratio: 4 / 5;
            background-color: var(--bg-code);
            position: relative;
        }

        .doc-hero-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .doc-hero-cover .cover-label {
            position: absolute;
            bottom: 16px;
            left: 16px;
            right: 16px;
            background: rgba(28, 25, 23, 0.85);
            backdrop-filter: blur(6px);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 10px 14px;
            font-size: 12px;
            color: var(--text-secondary);
            text-align: center;
            letter-spacing: 0.04em;
        }

        /* ===== 文档主体布局 ===== */
        .doc-main {
            padding: 56px 0 var(--section-pad);
            background-color: var(--bg-primary);
        }

        .doc-layout {
            display: grid;
            grid-template-columns: 240px 1fr;
            gap: 48px;
            align-items: start;
        }

        .doc-sidebar {
            position: sticky;
            top: calc(var(--nav-height) + var(--tabs-height) + 20px);
            max-height: calc(100vh - var(--nav-height) - var(--tabs-height) - 40px);
            overflow-y: auto;
            padding-right: 8px;
            scrollbar-width: thin;
            scrollbar-color: var(--border-accent) transparent;
        }

        .doc-sidebar::-webkit-scrollbar {
            width: 4px;
        }

        .doc-sidebar::-webkit-scrollbar-thumb {
            background-color: var(--border-accent);
            border-radius: 4px;
        }

        .sidebar-heading {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
            font-family: var(--font-sans);
        }

        .toc-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .toc-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 12px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            border-left: 2px solid transparent;
        }

        .toc-link .toc-num {
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--cinnabar);
            font-weight: 600;
            min-width: 22px;
        }

        .toc-link:hover {
            color: var(--accent);
            background-color: rgba(200, 155, 60, 0.06);
            border-left-color: var(--accent);
        }

        .toc-link.active {
            color: var(--accent);
            background-color: rgba(200, 155, 60, 0.1);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .doc-content {
            min-width: 0;
        }

        .doc-section {
            margin-bottom: 44px;
            padding-bottom: 36px;
            border-bottom: 1px solid var(--border-accent);
        }

        .doc-section:last-child {
            border-bottom: none;
            margin-bottom: 24px;
            padding-bottom: 0;
        }

        .doc-section-header {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 16px;
        }

        .doc-section-num {
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--cinnabar);
            background: rgba(139, 58, 42, 0.15);
            border: 1px solid var(--cinnabar);
            border-radius: var(--radius-sm);
            padding: 2px 8px;
            white-space: nowrap;
            margin-top: 4px;
        }

        .doc-section h2 {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin: 0;
            letter-spacing: 0.01em;
        }

        .doc-section p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .doc-section p strong {
            color: var(--text-primary);
            font-weight: 600;
        }

        .code-block {
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            overflow: hidden;
            margin: 16px 0 20px;
            box-shadow: var(--shadow-light);
        }

        .code-block-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 16px;
            background-color: rgba(28, 25, 23, 0.6);
            border-bottom: 1px solid var(--border-accent);
        }

        .code-block-dots {
            display: flex;
            gap: 6px;
        }

        .code-block-dots span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--border-accent);
        }

        .code-block-dots span:first-child {
            background-color: var(--cinnabar);
        }

        .code-block-dots span:nth-child(2) {
            background-color: var(--accent);
        }

        .code-block-label {
            font-size: 11px;
            color: var(--text-secondary);
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
        }

        .code-block pre {
            margin: 0;
            padding: 16px 18px;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--border-accent) transparent;
        }

        .code-block pre::-webkit-scrollbar {
            height: 4px;
        }

        .code-block pre::-webkit-scrollbar-thumb {
            background-color: var(--border-accent);
            border-radius: 4px;
        }

        .code-block code {
            font-family: var(--font-mono);
            font-size: 13px;
            line-height: 1.8;
            color: var(--paper-dark);
            white-space: pre;
        }

        .doc-tip {
            background-color: rgba(200, 155, 60, 0.08);
            border-left: 3px solid var(--accent);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            padding: 12px 16px;
            margin: 14px 0 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .doc-tip strong {
            color: var(--accent);
        }

        .doc-section-img {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-accent);
            overflow: hidden;
            margin: 16px 0 20px;
            aspect-ratio: 16 / 9;
            background-color: var(--bg-code);
        }

        .doc-section-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 上一篇/下一篇 */
        .prev-next-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--border-accent);
        }

        .prev-next-card {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            background-color: rgba(28, 25, 23, 0.5);
            transition: all 0.25s ease;
        }

        .prev-next-card:hover {
            border-color: var(--accent);
            background-color: rgba(200, 155, 60, 0.06);
        }

        .prev-next-card .arrow-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            color: var(--accent);
            font-size: 14px;
        }

        .prev-next-card .pn-label {
            font-size: 11px;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 2px;
        }

        .prev-next-card .pn-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            font-family: var(--font-serif);
        }

        .prev-next-card.next-card {
            flex-direction: row-reverse;
            text-align: right;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .section-title {
            font-family: var(--font-serif);
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.7;
            max-width: 620px;
        }

        .faq-list {
            max-width: 860px;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: var(--bg-primary);
        }

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

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            transition: color 0.25s ease;
            background: none;
            border: none;
            cursor: pointer;
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s ease;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* ===== 相关资源 ===== */
        .resource-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .resource-card {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: var(--bg-code);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .resource-card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            border-bottom: 1px solid var(--border-accent);
            background-color: var(--bg-code);
        }

        .resource-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .resource-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card-body h3 {
            font-family: var(--font-serif);
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .resource-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
        }

        .resource-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.25s ease;
        }

        .resource-link:hover {
            color: var(--accent-hover);
            text-decoration: underline;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--section-pad) 0;
            background-color: var(--accent);
        }

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

        .cta-inner h2 {
            font-family: var(--font-serif);
            font-size: 26px;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0;
            letter-spacing: 0.02em;
        }

        .cta-inner p {
            font-size: 15px;
            color: rgba(28, 25, 23, 0.75);
            margin: 6px 0 0;
            max-width: 480px;
        }

        .btn-dark {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background-color: var(--text-dark);
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-md);
            transition: background-color 0.25s ease, transform 0.2s ease;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .btn-dark:hover {
            background-color: #2a2520;
            color: var(--accent-hover);
            transform: translateY(-1px);
        }

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

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            max-width: 280px;
        }

        .footer-heading {
            font-size: 12px;
            font-weight: 700;
            color: var(--text-secondary);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }

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

        .subscribe-form {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
        }

        .subscribe-form input {
            flex: 1;
            padding: 10px 14px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            outline: none;
            min-width: 0;
            transition: border-color 0.25s ease;
        }

        .subscribe-form input:focus {
            border-color: var(--accent);
        }

        .subscribe-form input::placeholder {
            color: var(--text-secondary);
        }

        .subscribe-form button {
            padding: 10px 18px;
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-md);
            transition: background-color 0.25s ease;
            white-space: nowrap;
        }

        .subscribe-form button:hover {
            background-color: var(--accent-hover);
        }

        .subscribe-note {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-accent);
            padding: 18px 0;
            background-color: rgba(0, 0, 0, 0.2);
        }

        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            justify-content: space-between;
        }

        .footer-bottom p {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }

        .footer-links {
            display: flex;
            gap: 12px;
            font-size: 12px;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 12px;
        }

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

        /* ===== 快速导航（移动端） ===== */
        .mobile-toc {
            display: none;
            margin-bottom: 24px;
            padding: 16px 20px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
        }

        .mobile-toc .mobile-toc-title {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.06em;
            margin-bottom: 10px;
        }

        .mobile-toc ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .mobile-toc ul li a {
            display: inline-block;
            padding: 4px 12px;
            background-color: rgba(200, 155, 60, 0.08);
            border: 1px solid var(--border-accent);
            border-radius: 999px;
            font-size: 12px;
            color: var(--text-secondary);
            transition: all 0.25s ease;
        }

        .mobile-toc ul li a:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .doc-hero-grid {
                grid-template-columns: 1fr 300px;
                gap: 28px;
            }

            .doc-hero h1 {
                font-size: 32px;
            }

            .doc-layout {
                grid-template-columns: 200px 1fr;
                gap: 32px;
            }

            .doc-hero-toc-summary ul {
                grid-template-columns: 1fr;
            }

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

        @media (max-width: 768px) {
            .doc-hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .doc-hero-cover {
                aspect-ratio: 16 / 10;
                max-height: 260px;
            }

            .doc-hero h1 {
                font-size: 28px;
            }

            .doc-layout {
                grid-template-columns: 1fr;
                gap: 0;
            }

            .doc-sidebar {
                display: none;
            }

            .mobile-toc {
                display: block;
            }

            .prev-next-nav {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .prev-next-card.next-card {
                flex-direction: row;
                text-align: left;
            }

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

            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }

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

            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .nav-search input {
                width: 80px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }

            .doc-hero {
                padding: 32px 0;
            }

            .doc-hero h1 {
                font-size: 24px;
            }

            .doc-hero-sub {
                font-size: 14px;
            }

            .doc-hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .doc-hero-actions .btn-primary,
            .doc-hero-actions .btn-secondary-outline {
                width: 100%;
                justify-content: center;
            }

            .doc-hero-toc-summary ul {
                grid-template-columns: 1fr;
            }

            .doc-section h2 {
                font-size: 19px;
            }

            .doc-section p {
                font-size: 14px;
            }

            .code-block code {
                font-size: 12px;
            }

            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }

            .faq-answer p {
                font-size: 13px;
            }

            .section-title {
                font-size: 23px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 80px;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }

        /* 导航系统 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }

        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }

        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }

        .nav-search:focus-within {
            border-color: var(--accent);
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--text-secondary);
        }

        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
            display: inline-block;
        }

        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 0 4px;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 999px;
            border: 1px solid var(--border-accent);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
            transition: all 0.25s ease;
            background: transparent;
        }

        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }

        /* Hero */
        .hero-section {
            position: relative;
            overflow: hidden;
            background-color: var(--bg-primary);
        }

        .hero-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(200, 155, 60, 0.08) 0%, transparent 55%),
                radial-gradient(ellipse at 20% 80%, rgba(139, 58, 42, 0.1) 0%, transparent 45%);
            pointer-events: none;
        }

        .trust-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border: 1px solid var(--cinnabar);
            border-radius: var(--radius-sm);
            color: var(--cinnabar);
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.05em;
            background: rgba(139, 58, 42, 0.08);
        }

        .hero-image-frame {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: var(--bg-code);
            position: relative;
        }

        .hero-image-frame::after {
            content: "";
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(200, 155, 60, 0.15);
            pointer-events: none;
        }

        /* 卡片 */
        .service-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all 0.3s ease;
            position: relative;
        }

        .service-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .service-number {
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--cinnabar);
            letter-spacing: 0.08em;
            border-bottom: 2px solid var(--cinnabar);
            display: inline-block;
            padding-bottom: 2px;
            margin-bottom: 12px;
        }

        /* 数据带 */
        .data-band {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .data-value {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }

        /* 案例区块 */
        .case-block {
            display: flex;
            gap: 24px;
            align-items: center;
            padding: 32px 0;
            border-bottom: 1px solid var(--border-accent);
        }

        .case-block:last-child {
            border-bottom: none;
        }

        .case-image {
            width: 40%;
            flex-shrink: 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-accent);
            background-color: var(--bg-code);
        }

        .case-content {
            flex: 1;
        }

        /* 方案卡 */
        .plan-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all 0.3s ease;
            position: relative;
            display: flex;
            flex-direction: column;
        }

        .plan-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .plan-card.featured {
            border: 2px solid var(--accent);
            background: rgba(200, 155, 60, 0.06);
        }

        .plan-card.featured::before {
            content: "推荐";
            position: absolute;
            top: -12px;
            right: 20px;
            background-color: var(--accent);
            color: var(--text-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 999px;
            letter-spacing: 0.05em;
        }

        .plan-feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .plan-feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            padding: 6px 0;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .plan-feature-list li i {
            color: var(--accent);
            font-size: 14px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            background: rgba(237, 230, 214, 0.04);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.25s ease;
        }

        .faq-item:hover {
            border-color: rgba(200, 155, 60, 0.5);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            font-family: var(--font-serif);
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            cursor: pointer;
            gap: 12px;
            user-select: none;
            transition: color 0.25s ease;
        }

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

        .faq-question i {
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 16px 20px;
        }

        /* CTA 横幅 */
        .cta-banner {
            background-color: var(--accent);
            color: var(--text-dark);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
        }

        .cta-banner .btn-reverse {
            background-color: var(--bg-primary);
            color: var(--accent);
            padding: 10px 24px;
            border-radius: var(--radius-md);
            font-weight: 600;
            display: inline-block;
            transition: all 0.25s ease;
        }

        .cta-banner .btn-reverse:hover {
            background-color: var(--bg-code);
            color: var(--accent-hover);
            transform: translateY(-1px);
        }

        /* 资讯动态 */
        .news-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-accent);
        }

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

        .news-date {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.05em;
            white-space: nowrap;
            padding-top: 2px;
        }

        /* 评价卡片 */
        .review-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all 0.3s ease;
        }

        .review-card:hover {
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* 合作伙伴标签 */
        .partner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            border: 1px solid var(--border-accent);
            border-radius: 999px;
            color: var(--text-secondary);
            font-size: 13px;
            transition: all 0.25s ease;
            background: transparent;
        }

        .partner-tag:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: rgba(200, 155, 60, 0.05);
        }

        /* Footer */
        .site-footer {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 48px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 32px;
        }

        .footer-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 8px;
        }

        .footer-desc {
            color: var(--text-secondary);
            font-size: 14px;
            max-width: 240px;
        }

        .footer-heading {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--text-primary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 6px;
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.25s ease;
        }

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

        .subscribe-form {
            display: flex;
            gap: 8px;
        }

        .subscribe-form input {
            flex: 1;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 8px 12px;
            color: var(--text-primary);
            font-size: 14px;
            font-family: var(--font-sans);
            outline: none;
        }

        .subscribe-form input:focus {
            border-color: var(--accent);
        }

        .subscribe-form input::placeholder {
            color: var(--text-secondary);
        }

        .subscribe-form button {
            background-color: var(--accent);
            color: var(--text-dark);
            border-radius: var(--radius-md);
            padding: 8px 16px;
            font-weight: 600;
            font-size: 14px;
            transition: background-color 0.25s ease;
            white-space: nowrap;
        }

        .subscribe-form button:hover {
            background-color: var(--accent-hover);
        }

        .subscribe-note {
            color: var(--text-secondary);
            font-size: 12px;
            margin-top: 8px;
        }

        .footer-bottom {
            background-color: #0f0d0b;
            border-top: 1px solid var(--border-accent);
            padding: 16px 0;
        }

        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            align-items: center;
            justify-content: space-between;
        }

        .copyright {
            color: var(--text-secondary);
            font-size: 12px;
            margin: 0;
        }

        .beian {
            color: var(--text-secondary);
            font-size: 12px;
            margin: 0;
        }

        .footer-links {
            color: var(--text-secondary);
            font-size: 12px;
            margin: 0;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 12px;
        }

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

        /* 响应式 */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 56px;
            }

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

            .case-block {
                flex-direction: column;
                align-items: flex-start;
            }

            .case-image {
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 40px;
                --nav-height: 56px;
                --tabs-height: 40px;
            }

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

            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }

            .nav-search input {
                width: 80px;
            }

            .nav-cta {
                padding: 6px 14px;
                font-size: 13px;
            }

            .cta-banner {
                padding: 28px 24px;
            }

            .data-value {
                font-size: 24px;
            }

            .hero-section .grid {
                grid-template-columns: 1fr;
            }

            .hero-image-frame {
                max-height: 240px;
                overflow: hidden;
            }
        }

        @media (max-width: 480px) {
            .nav-search {
                display: none;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-logo .logo-mark {
                width: 24px;
                height: 24px;
                font-size: 12px;
            }

            .nav-cta {
                font-size: 12px;
                padding: 6px 12px;
            }

            .nav-tab {
                font-size: 12px;
                padding: 5px 12px;
            }

            .service-card {
                padding: 18px;
            }

            .plan-card {
                padding: 20px;
            }

            .data-value {
                font-size: 20px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }
        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }
        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }
        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
        }
        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-secondary);
        }
        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }
        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }
        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.04em;
            border: 1px solid var(--border-accent);
            color: var(--text-secondary);
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }
        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }
        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
        }
        .btn-primary:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-light);
        }
        .btn-primary:active {
            transform: translateY(0);
            background-color: #b8902f;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-md);
            background-color: transparent;
            border: 1px solid var(--accent);
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, color 0.25s ease, transform 0.2s ease;
        }
        .btn-secondary:hover {
            background-color: rgba(200, 155, 60, 0.1);
            color: var(--accent-hover);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-inverse {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            border-radius: var(--radius-md);
            background-color: var(--bg-primary);
            color: var(--paper);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }
        .btn-inverse:hover {
            background-color: #2a2522;
            transform: translateY(-2px);
        }
        .section-title {
            font-family: var(--font-serif);
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--paper);
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
        }
        .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.05em;
            border: 1px solid var(--cinnabar);
            color: var(--cinnabar);
            background-color: rgba(139, 58, 42, 0.08);
        }
        .hero-section {
            position: relative;
            padding: 40px 0 28px;
            border-bottom: 1px solid var(--border-accent);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 30%, rgba(200, 155, 60, 0.06), transparent 55%);
            pointer-events: none;
        }
        .hero-flex {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 32px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-title {
            font-family: var(--font-serif);
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--paper);
            letter-spacing: 0.05em;
            margin-bottom: 14px;
        }
        .hero-title .hl {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 18px;
        }
        .hero-img-wrap {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: var(--bg-code);
            aspect-ratio: 16 / 10;
        }
        .hero-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .section-divider {
            border: none;
            border-top: 1px solid var(--border-accent);
            margin: 0;
        }
        .version-overview-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 24px;
        }
        .version-card {
            background-color: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: border-color 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
        }
        .version-card:hover {
            border-color: var(--accent);
            transform: translateY(-3px);
            box-shadow: var(--shadow-light);
        }
        .version-card .v-label {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--cinnabar);
            letter-spacing: 0.06em;
            margin-bottom: 6px;
        }
        .version-card .v-name {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--paper);
            margin-bottom: 8px;
        }
        .version-card .v-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .compare-wrapper {
            overflow-x: auto;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            background-color: var(--bg-code);
            margin-top: 24px;
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 900px;
        }
        .compare-table th,
        .compare-table td {
            padding: 14px 16px;
            text-align: center;
            border-bottom: 1px solid var(--border-accent);
            font-size: 14px;
        }
        .compare-table th:first-child,
        .compare-table td:first-child {
            text-align: left;
            position: sticky;
            left: 0;
            background-color: var(--bg-code);
            z-index: 1;
            font-weight: 600;
            color: var(--paper);
            font-family: var(--font-sans);
            min-width: 180px;
        }
        .compare-table thead th {
            font-family: var(--font-serif);
            font-size: 15px;
            font-weight: 700;
            color: var(--accent);
            border-bottom: 2px solid var(--accent);
            padding-top: 16px;
            padding-bottom: 16px;
        }
        .compare-table thead th:first-child {
            color: var(--text-secondary);
            font-family: var(--font-sans);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.04em;
        }
        .compare-table tbody tr:hover td {
            background-color: rgba(200, 155, 60, 0.04);
        }
        .compare-table tbody tr:last-child td {
            border-bottom: none;
        }
        .check-icon {
            color: var(--accent);
            font-size: 16px;
        }
        .dash-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }
        .rec-banner {
            display: grid;
            grid-template-columns: 1fr auto;
            align-items: center;
            gap: 20px;
            background-color: var(--accent);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            margin-top: 28px;
        }
        .rec-banner .rec-title {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: 0.04em;
            margin-bottom: 6px;
        }
        .rec-banner .rec-text {
            font-size: 14px;
            color: rgba(28, 25, 23, 0.7);
            line-height: 1.6;
        }
        .rec-banner .rec-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .scenario-list {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }
        .scenario-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-accent);
        }
        .scenario-list li:last-child {
            border-bottom: none;
        }
        .scenario-num {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--cinnabar);
            font-weight: 700;
            min-width: 30px;
            padding-top: 2px;
            letter-spacing: 0.05em;
        }
        .scenario-content h4 {
            font-family: var(--font-serif);
            font-size: 17px;
            font-weight: 600;
            color: var(--paper);
            margin-bottom: 4px;
        }
        .scenario-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-accent);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 4px;
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--paper);
            cursor: pointer;
            transition: color 0.25s ease;
            text-align: left;
            width: 100%;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question .fa-chevron-down {
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0 4px;
        }
        .faq-item.open .faq-question .fa-chevron-down {
            transform: rotate(180deg);
        }
        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 0 4px 16px;
        }
        .site-footer {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 48px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
            gap: 32px;
            padding-bottom: 32px;
        }
        .footer-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 260px;
        }
        .footer-heading {
            font-size: 13px;
            font-weight: 600;
            color: var(--paper);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .subscribe-form {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
        }
        .subscribe-form input {
            flex: 1;
            padding: 8px 12px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-accent);
            background-color: var(--bg-code);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            outline: none;
            transition: border-color 0.25s ease;
        }
        .subscribe-form input:focus {
            border-color: var(--accent);
        }
        .subscribe-form button {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            transition: background-color 0.25s ease;
        }
        .subscribe-form button:hover {
            background-color: var(--accent-hover);
        }
        .subscribe-note {
            font-size: 12px;
            color: var(--text-secondary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-accent);
            padding: 16px 0;
        }
        .copyright,
        .beian,
        .footer-links {
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        .footer-links a {
            color: var(--text-secondary);
            transition: color 0.25s ease;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        @media (max-width: 1024px) {
            .version-overview-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: 30px;
            }
        }
        @media (max-width: 768px) {
            .hero-flex {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .hero-title {
                font-size: 26px;
            }
            .version-overview-grid {
                grid-template-columns: 1fr;
            }
            .rec-banner {
                grid-template-columns: 1fr;
                text-align: left;
            }
            .rec-banner .rec-actions {
                justify-content: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .nav-search input {
                width: 80px;
            }
            .nav-cta {
                padding: 8px 12px;
                font-size: 13px;
            }
        }
        @media (max-width: 480px) {
            .section-title {
                font-size: 22px;
            }
            .container {
                padding: 0 16px;
            }
            .nav-logo {
                font-size: 17px;
            }
            .nav-search input {
                display: none;
            }
            .hero-title {
                font-size: 23px;
            }
            .rec-banner {
                padding: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 56px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }
        a:hover {
            color: var(--accent-hover);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* ===== 导航系统 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }
        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }
        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }
        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
        }
        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-secondary);
        }
        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }
        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }
        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 0 4px;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 9999px;
            border: 1px solid var(--border-accent);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: all 0.25s ease;
        }
        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }
        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }
        /* ===== 分类Hero ===== */
        .category-hero {
            padding: 40px 0 32px;
            border-bottom: 1px solid var(--border-accent);
            background: radial-gradient(ellipse at 20% 30%, rgba(200, 155, 60, 0.06), transparent 65%),
                radial-gradient(ellipse at 80% 70%, rgba(139, 58, 42, 0.05), transparent 55%);
        }
        .category-hero .hero-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 32px;
        }
        .category-hero .hero-text {
            flex: 1 1 300px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            padding: 3px 10px;
            border: 1px solid var(--cinnabar);
            color: var(--cinnabar);
            border-radius: var(--radius-sm);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 12px;
            background-color: rgba(139, 58, 42, 0.08);
        }
        .category-hero h1 {
            font-family: var(--font-serif);
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-primary);
            margin: 0 0 12px;
            letter-spacing: 0.02em;
        }
        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0;
            max-width: 560px;
        }
        .hero-icon-matrix {
            flex: 1 1 280px;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 12px;
            background-color: rgba(28, 25, 23, 0.55);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 20px;
        }
        .hero-icon-matrix .matrix-icon {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: var(--radius-md);
            background-color: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            transition: border-color 0.25s ease;
        }
        .hero-icon-matrix .matrix-icon:hover {
            border-color: var(--accent);
        }
        .hero-icon-matrix .matrix-icon i {
            color: var(--accent);
            font-size: 18px;
            width: 24px;
            text-align: center;
        }
        .hero-icon-matrix .matrix-icon span {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .hero-status-bar {
            margin-top: 16px;
            flex-basis: 100%;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            background-color: rgba(237, 230, 214, 0.04);
            border-radius: var(--radius-md);
            padding: 12px 18px;
            border: 1px solid var(--border-accent);
        }
        .hero-status-bar .status-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--paper);
        }
        .hero-status-bar .status-track {
            flex: 1;
            min-width: 160px;
            height: 6px;
            background-color: rgba(237, 230, 214, 0.12);
            border-radius: 99px;
            overflow: hidden;
        }
        .hero-status-bar .status-fill {
            height: 100%;
            width: 78%;
            background-color: var(--accent);
            border-radius: 99px;
            transition: width 0.6s ease;
        }
        .hero-status-bar .status-pct {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--accent);
            font-weight: 700;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--section-pad) 0;
        }
        .section-alt {
            background-color: rgba(237, 230, 214, 0.03);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }
        .section-head {
            margin-bottom: 32px;
        }
        .section-head .section-kicker {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 12px;
            letter-spacing: 0.14em;
            color: var(--cinnabar);
            text-transform: uppercase;
            border-bottom: 2px solid var(--cinnabar);
            padding-bottom: 4px;
            margin-bottom: 10px;
        }
        .section-head h2 {
            font-family: var(--font-serif);
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
            line-height: 1.4;
            letter-spacing: 0.01em;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 8px 0 0;
            line-height: 1.7;
            max-width: 640px;
        }

        /* ===== 参数卡片网格 ===== */
        .param-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 0;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: rgba(237, 230, 214, 0.03);
        }
        .param-card {
            padding: 22px 20px;
            border-right: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
            transition: background-color 0.25s ease, box-shadow 0.25s ease;
            position: relative;
        }
        .param-card:nth-child(4n) {
            border-right: none;
        }
        .param-card:hover {
            background-color: rgba(200, 155, 60, 0.06);
            box-shadow: inset 0 0 0 1px rgba(200, 155, 60, 0.2);
        }
        .param-card .param-name {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .param-card .param-name .param-icon {
            color: var(--cinnabar);
            font-size: 14px;
        }
        .param-card .param-value {
            font-family: var(--font-mono);
            font-size: 15px;
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 8px;
            background-color: var(--bg-code);
            display: inline-block;
            padding: 2px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.02em;
        }
        .param-card .param-range {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .param-card .param-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 6px 0 0;
            padding-top: 6px;
            border-top: 1px dashed var(--border-accent);
        }

        /* ===== 最佳实践列表 ===== */
        .practice-list {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: practice;
        }
        .practice-list li {
            counter-increment: practice;
            display: flex;
            gap: 16px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-accent);
        }
        .practice-list li:last-child {
            border-bottom: none;
        }
        .practice-list .practice-num {
            font-family: var(--font-mono);
            font-size: 18px;
            font-weight: 700;
            color: var(--cinnabar);
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border: 1.5px solid var(--cinnabar);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .practice-list .practice-content h3 {
            font-family: var(--font-serif);
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 6px;
            line-height: 1.4;
        }
        .practice-list .practice-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }

        /* ===== 场景区 ===== */
        .scene-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
        }
        .scene-image {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
        }
        .scene-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .scene-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 2px solid rgba(200, 155, 60, 0.3);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }
        .scene-content h3 {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px;
            line-height: 1.4;
        }
        .scene-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }
        .scene-content .scene-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            background-color: rgba(200, 155, 60, 0.12);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.05em;
            margin-right: 8px;
            margin-bottom: 8px;
        }

        /* ===== 检查清单 ===== */
        .checklist {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .checklist-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 14px 16px;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            background-color: rgba(237, 230, 214, 0.03);
            transition: border-color 0.25s ease;
        }
        .checklist-item:hover {
            border-color: var(--accent);
        }
        .checklist-item i {
            color: var(--accent);
            font-size: 15px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .checklist-item span {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-container {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background-color: rgba(237, 230, 214, 0.03);
        }
        .faq-item {
            border-bottom: 1px solid var(--border-accent);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            text-align: left;
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color 0.25s ease;
            gap: 12px;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question .faq-arrow {
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .faq-question[aria-expanded="true"] .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA横幅 ===== */
        .cta-banner {
            background-color: var(--accent);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .cta-banner .cta-text h2 {
            font-family: var(--font-serif);
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 6px;
            line-height: 1.4;
        }
        .cta-banner .cta-text p {
            font-size: 14px;
            color: rgba(28, 25, 23, 0.7);
            margin: 0;
            line-height: 1.6;
        }
        .cta-banner .cta-btn {
            padding: 12px 24px;
            border-radius: var(--radius-md);
            background-color: var(--text-dark);
            color: var(--paper);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }
        .cta-banner .cta-btn:hover {
            background-color: #2a251f;
            color: var(--paper);
            transform: translateY(-1px);
        }
        .cta-banner .cta-btn:active {
            transform: translateY(0);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 28px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--border-accent);
        }
        .footer-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .footer-heading {
            font-size: 13px;
            font-weight: 600;
            color: var(--paper);
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: color 0.25s ease;
        }
        .site-footer ul a:hover {
            color: var(--accent);
        }
        .subscribe-form {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 0;
            padding: 8px 12px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-accent);
            background-color: var(--bg-code);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 13px;
            outline: none;
        }
        .subscribe-form input:focus {
            border-color: var(--accent);
        }
        .subscribe-form button {
            padding: 8px 16px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 13px;
            transition: background-color 0.25s ease;
        }
        .subscribe-form button:hover {
            background-color: var(--accent-hover);
        }
        .subscribe-note {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        .footer-bottom {
            padding: 16px 0;
            border-top: 1px solid rgba(200, 155, 60, 0.15);
        }
        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
            justify-content: space-between;
        }
        .copyright {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }
        .beian {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }
        .footer-links {
            font-size: 12px;
            color: var(--text-secondary);
            margin: 0;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 12px;
        }
        .footer-links a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-search input {
                width: 80px;
            }
            .category-hero .hero-inner {
                flex-direction: column;
                align-items: stretch;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .hero-icon-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .scene-image img {
                height: 200px;
            }
            .checklist {
                grid-template-columns: 1fr;
            }
            .param-grid {
                grid-template-columns: 1fr 1fr;
            }
            .param-card:nth-child(4n) {
                border-right: 1px solid var(--border-accent);
            }
            .param-card:nth-child(2n) {
                border-right: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 480px) {
            .nav-top {
                gap: 8px;
            }
            .nav-logo {
                font-size: 17px;
            }
            .nav-logo .logo-mark {
                width: 24px;
                height: 24px;
                font-size: 12px;
            }
            .nav-search {
                padding: 4px 8px;
            }
            .nav-search input {
                width: 60px;
                font-size: 12px;
            }
            .nav-cta {
                padding: 6px 12px;
                font-size: 12px;
            }
            .hero-icon-matrix {
                grid-template-columns: 1fr;
                padding: 14px;
            }
            .param-grid {
                grid-template-columns: 1fr;
            }
            .param-card:nth-child(n) {
                border-right: none;
            }
            .cta-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 20px;
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 56px;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航系统 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }

        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }

        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }

        .nav-search:focus-within {
            border-color: var(--accent);
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--text-secondary);
        }

        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
            display: inline-block;
        }

        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
            letter-spacing: 0.04em;
            border: 1px solid var(--border-accent);
            color: var(--text-secondary);
            transition: all 0.25s ease;
            display: inline-block;
        }

        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }

        /* ===== Hero 分类页 ===== */
        .page-hero {
            padding: 40px 0 32px;
            background: radial-gradient(ellipse at 20% 0%, rgba(200, 155, 60, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 100%, rgba(139, 58, 42, 0.06) 0%, transparent 50%);
            border-bottom: 1px solid var(--border-accent);
        }

        .page-hero .hero-title {
            font-family: var(--font-serif);
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .page-hero .hero-title .accent {
            color: var(--accent);
        }

        .page-hero .hero-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        /* ===== 订阅区块 ===== */
        .subscribe-section {
            padding: 32px 0;
        }

        .subscribe-panel {
            background: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .subscribe-panel .subscribe-label {
            font-family: var(--font-serif);
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .subscribe-panel .subscribe-form {
            display: flex;
            gap: 10px;
            flex: 1;
            min-width: 280px;
            max-width: 480px;
        }

        .subscribe-panel .subscribe-form input {
            flex: 1;
            padding: 10px 14px;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            outline: none;
            transition: border-color 0.25s ease;
            min-width: 0;
        }

        .subscribe-panel .subscribe-form input:focus {
            border-color: var(--accent);
        }

        .subscribe-panel .subscribe-form input::placeholder {
            color: var(--text-secondary);
        }

        .subscribe-panel .subscribe-form button {
            padding: 10px 22px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }

        .subscribe-panel .subscribe-form button:hover {
            background-color: var(--accent-hover);
            transform: translateY(-1px);
        }

        .subscribe-panel .subscribe-form button:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        /* ===== 时间线区域 ===== */
        .timeline-section {
            padding: 24px 0 56px;
        }

        .timeline-header {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .timeline-header .timeline-title {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }

        .timeline-header .timeline-count {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
        }

        .timeline-container {
            position: relative;
            padding-left: 32px;
        }

        .timeline-container::before {
            content: "";
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-accent);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 32px;
            padding-left: 0;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: -32px;
            top: 18px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 2px solid var(--bg-primary);
            box-shadow: 0 0 0 2px var(--accent);
            z-index: 1;
        }

        .timeline-item .timeline-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
        }

        .timeline-item .timeline-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .timeline-card .card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 12px;
        }

        .timeline-card .version-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 12px;
            border-radius: var(--radius-sm);
            background: rgba(200, 155, 60, 0.12);
            color: var(--accent);
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            border: 1px solid rgba(200, 155, 60, 0.3);
        }

        .timeline-card .version-tag.is-major {
            background: rgba(139, 58, 42, 0.15);
            color: #D98A7A;
            border-color: rgba(139, 58, 42, 0.4);
        }

        .timeline-card .date-tag {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--text-secondary);
            letter-spacing: 0.06em;
        }

        .timeline-card .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .timeline-card .card-detail-list {
            margin-top: 10px;
            padding-left: 0;
            list-style: none;
        }

        .timeline-card .card-detail-list li {
            font-size: 13px;
            color: var(--text-secondary);
            padding-left: 18px;
            position: relative;
            line-height: 1.6;
            margin-bottom: 4px;
        }

        .timeline-card .card-detail-list li::before {
            content: "→";
            position: absolute;
            left: 0;
            top: 0;
            color: var(--accent);
            font-family: var(--font-mono);
            font-size: 12px;
        }

        /* ===== 里程碑摘要 ===== */
        .milestone-section {
            padding: 48px 0;
            border-top: 1px solid var(--border-accent);
            background: rgba(237, 230, 214, 0.02);
        }

        .milestone-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .milestone-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            padding: 20px;
            text-align: center;
            transition: border-color 0.25s ease;
        }

        .milestone-card:hover {
            border-color: var(--accent);
        }

        .milestone-card .milestone-number {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.04em;
        }

        .milestone-card .milestone-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
            letter-spacing: 0.04em;
        }

        /* ===== 升级提示 ===== */
        .upgrade-tips {
            padding: 48px 0;
        }

        .upgrade-tips .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 16px 18px;
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            transition: border-color 0.25s ease;
        }

        .tip-item:hover {
            border-color: var(--accent);
        }

        .tip-item .tip-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(200, 155, 60, 0.1);
            color: var(--accent);
            font-size: 13px;
        }

        .tip-item .tip-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 56px 0;
            border-top: 1px solid var(--border-accent);
        }

        .cta-banner {
            background: var(--accent);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .cta-banner .cta-text {
            flex: 1;
            min-width: 240px;
        }

        .cta-banner .cta-text h2 {
            font-family: var(--font-serif);
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .cta-banner .cta-text p {
            font-size: 14px;
            color: rgba(28, 25, 23, 0.7);
            line-height: 1.5;
        }

        .cta-banner .cta-button {
            padding: 12px 28px;
            border-radius: var(--radius-md);
            background: var(--text-dark);
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
            display: inline-block;
        }

        .cta-banner .cta-button:hover {
            background: #2e2926;
            color: var(--accent-hover);
            transform: translateY(-1px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 48px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
            gap: 32px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }

        .footer-brand .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 240px;
        }

        .footer-heading {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.1em;
            text-transform: uppercase;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: var(--text-secondary);
            font-size: 13px;
            transition: color 0.25s ease;
        }

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

        .footer-subscribe .subscribe-form {
            display: flex;
            gap: 8px;
            margin-top: 4px;
        }

        .footer-subscribe .subscribe-form input {
            flex: 1;
            padding: 9px 12px;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 13px;
            outline: none;
            min-width: 0;
        }

        .footer-subscribe .subscribe-form input:focus {
            border-color: var(--accent);
        }

        .footer-subscribe .subscribe-form button {
            padding: 9px 16px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 13px;
            white-space: nowrap;
            transition: background-color 0.25s ease;
        }

        .footer-subscribe .subscribe-form button:hover {
            background: var(--accent-hover);
        }

        .footer-subscribe .subscribe-note {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 8px;
            line-height: 1.5;
        }

        .footer-bottom {
            border-top: 1px solid rgba(200, 155, 60, 0.15);
            padding: 16px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .footer-bottom .footer-links {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .footer-bottom .footer-links a {
            color: var(--text-secondary);
            font-size: 12px;
        }

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

        .copyright,
        .beian {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .milestone-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }

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

        @media (max-width: 768px) {
            :root {
                --section-pad: 40px;
                --nav-height: 56px;
                --tabs-height: 40px;
            }

            .container {
                padding: 0 16px;
            }

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

            .page-hero .hero-subtitle {
                font-size: 14px;
            }

            .timeline-container {
                padding-left: 24px;
            }

            .timeline-container::before {
                left: 6px;
            }

            .timeline-item::before {
                left: -24px;
                width: 10px;
                height: 10px;
                top: 16px;
            }

            .milestone-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .upgrade-tips .tips-grid {
                grid-template-columns: 1fr;
            }

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

            .cta-banner {
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 20px;
            }

            .subscribe-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 20px;
            }

            .subscribe-panel .subscribe-form {
                width: 100%;
                max-width: 100%;
                min-width: 0;
            }

            .nav-search input {
                width: 80px;
            }

            .nav-search input:focus {
                width: 140px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-pad: 32px;
            }

            .nav-top {
                gap: 8px;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-logo .logo-mark {
                width: 24px;
                height: 24px;
                font-size: 12px;
            }

            .nav-cta {
                padding: 6px 12px;
                font-size: 13px;
            }

            .nav-actions {
                gap: 6px;
            }

            .nav-search {
                padding: 4px 8px;
            }

            .nav-search input {
                width: 60px;
                font-size: 12px;
            }

            .page-hero {
                padding: 28px 0 24px;
            }

            .page-hero .hero-title {
                font-size: 20px;
            }

            .timeline-card {
                padding: 16px 16px;
            }

            .timeline-card .card-top {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

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

            .milestone-card .milestone-number {
                font-size: 22px;
            }

            .cta-banner .cta-text h2 {
                font-size: 18px;
            }

            .cta-banner .cta-button {
                padding: 10px 20px;
                font-size: 14px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

/* roulang page: category5 */
:root {
            --bg-primary: #1C1917;
            --bg-footer: #151210;
            --bg-code: #141210;
            --accent: #C89B3C;
            --accent-hover: #D9AE55;
            --accent-ring: rgba(200, 155, 60, 0.45);
            --paper: #EDE6D6;
            --paper-dark: #D8CDB4;
            --cinnabar: #8B3A2A;
            --text-primary: #EDE6D6;
            --text-secondary: rgba(237, 230, 214, 0.68);
            --text-dark: #1C1917;
            --text-dark-secondary: rgba(28, 25, 23, 0.68);
            --border-accent: rgba(200, 155, 60, 0.28);
            --border-dark: rgba(28, 25, 23, 0.16);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 6px 20px rgba(0, 0, 0, 0.45);
            --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
            --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-mono: "JetBrains Mono", "SFMono-Regular", "Consolas", monospace;
            --nav-height: 64px;
            --tabs-height: 44px;
            --section-pad: 80px;
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-size: 15px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
        }

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        button {
            font-family: var(--font-sans);
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 导航系统 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }

        .nav-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }

        .nav-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            letter-spacing: 0.04em;
        }

        .nav-logo .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: var(--bg-code);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 6px 12px;
            transition: border-color 0.25s ease;
        }

        .nav-search:focus-within {
            border-color: var(--accent);
        }

        .nav-search input {
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            width: 140px;
            outline: none;
        }

        .nav-search input::placeholder {
            color: var(--text-secondary);
        }

        .nav-search .search-icon {
            color: var(--text-secondary);
            font-size: 14px;
        }

        .nav-cta {
            padding: 8px 18px;
            border-radius: var(--radius-md);
            background-color: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease, transform 0.2s ease;
        }

        .nav-cta:hover {
            background-color: var(--accent-hover);
            color: var(--text-dark);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
            background-color: #b8902f;
        }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 8px;
            height: var(--tabs-height);
            overflow-x: auto;
            overflow-y: hidden;
            scrollbar-width: none;
            -ms-overflow-style: none;
            border-top: 1px solid var(--border-accent);
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            flex-shrink: 0;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.03em;
            color: var(--text-secondary);
            border: 1px solid var(--border-accent);
            transition: all 0.25s ease;
            white-space: nowrap;
            background: transparent;
        }

        .nav-tab:hover {
            color: var(--accent);
            border-color: var(--accent);
        }

        .nav-tab.active {
            background-color: var(--accent);
            color: var(--text-dark);
            border-color: var(--accent);
            font-weight: 600;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 48px 0 40px;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--border-accent);
        }

        .page-hero .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hero-badge {
            display: inline-block;
            padding: 4px 14px;
            border: 1px solid var(--cinnabar);
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 600;
            color: var(--cinnabar);
            letter-spacing: 0.06em;
            margin-bottom: 16px;
            background: rgba(139, 58, 42, 0.12);
        }

        .page-hero h1 {
            font-family: var(--font-serif);
            font-size: 36px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
        }

        .page-hero h1 .accent-text {
            color: var(--accent);
        }

        .hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 24px;
        }

        .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat .stat-num {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.03em;
        }

        .hero-stat .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
        }

        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-accent);
            box-shadow: var(--shadow-light);
        }

        .hero-image-wrap img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .hero-image-wrap:hover img {
            transform: scale(1.03);
        }

        .hero-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 2px solid var(--border-accent);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }

        /* ===== 诊断概览 ===== */
        .diagnostic-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

        .section-heading {
            margin-bottom: 36px;
        }

        .section-heading h2 {
            font-family: var(--font-serif);
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            margin-bottom: 8px;
        }

        .section-heading p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        .diagnostic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .diagnostic-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all 0.3s ease;
        }

        .diagnostic-card:hover {
            border-color: var(--accent);
            background: rgba(200, 155, 60, 0.08);
            transform: translateY(-2px);
            box-shadow: var(--shadow-light);
        }

        .diagnostic-card .diag-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(200, 155, 60, 0.15);
            color: var(--accent);
            font-size: 18px;
            margin-bottom: 12px;
        }

        .diagnostic-card h3 {
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .diagnostic-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== 手风琴 ===== */
        .accordion-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            border-bottom: 1px solid var(--border-accent);
        }

        .accordion-container {
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            background: rgba(237, 230, 214, 0.03);
            overflow: hidden;
        }

        .accordion-item {
            border-bottom: 1px solid var(--border-accent);
            transition: background-color 0.3s ease;
        }

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

        .accordion-item:hover {
            background: rgba(200, 155, 60, 0.04);
        }

        .accordion-item.active {
            background: rgba(200, 155, 60, 0.06);
        }

        .accordion-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            width: 100%;
            text-align: left;
            background: transparent;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
        }

        .accordion-header .acc-title-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
            flex: 1;
            min-width: 0;
        }

        .acc-number {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 700;
            color: var(--cinnabar);
            flex-shrink: 0;
            letter-spacing: 0.05em;
        }

        .accordion-header .acc-title {
            font-family: var(--font-serif);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            transition: color 0.25s ease;
        }

        .accordion-header:hover .acc-title {
            color: var(--accent);
        }

        .accordion-item.active .acc-title {
            color: var(--accent);
        }

        .accordion-header .acc-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(200, 155, 60, 0.12);
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.35s ease;
        }

        .accordion-item.active .acc-icon {
            transform: rotate(180deg);
            background: var(--accent);
            color: var(--text-dark);
        }

        .accordion-body {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.45s ease, padding 0.35s ease;
        }

        .accordion-item.active .accordion-body {
            padding: 0 24px 24px;
        }

        .accordion-content {
            padding-top: 0;
        }

        .acc-section-label {
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: inline-block;
        }

        .acc-cause {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            padding-left: 16px;
            border-left: 3px solid var(--cinnabar);
        }

        .acc-steps {
            list-style: none;
            padding: 0;
            margin: 0;
            counter-reset: step-counter;
        }

        .acc-steps li {
            counter-increment: step-counter;
            font-size: 14px;
            color: var(--text-primary);
            line-height: 1.8;
            margin-bottom: 10px;
            padding-left: 32px;
            position: relative;
        }

        .acc-steps li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 3px;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(200, 155, 60, 0.15);
            color: var(--accent);
            font-family: var(--font-mono);
            font-size: 11px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== 错误代码表 ===== */
        .error-code-section {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

        .error-table-wrap {
            overflow-x: auto;
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-lg);
            background: rgba(237, 230, 214, 0.03);
        }

        .error-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .error-table thead tr {
            border-bottom: 2px solid var(--accent);
        }

        .error-table th {
            font-family: var(--font-mono);
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            text-align: left;
            padding: 14px 16px;
            letter-spacing: 0.04em;
        }

        .error-table td {
            font-size: 14px;
            color: var(--text-primary);
            padding: 12px 16px;
            border-bottom: 1px solid var(--border-accent);
            line-height: 1.6;
        }

        .error-table tbody tr:last-child td {
            border-bottom: none;
        }

        .error-table tbody tr:hover {
            background: rgba(200, 155, 60, 0.05);
        }

        .error-table .code-cell {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--cinnabar);
            font-weight: 600;
            white-space: nowrap;
        }

        .error-table .action-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            font-size: 12px;
            font-weight: 600;
            background: rgba(200, 155, 60, 0.15);
            color: var(--accent);
        }

        /* ===== 预防维护 ===== */
        .prevention-section {
            padding: var(--section-pad) 0;
            background: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
        }

        .prevention-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .prevention-card {
            background: rgba(237, 230, 214, 0.04);
            border: 1px solid var(--border-accent);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
        }

        .prevention-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-light);
            transform: translateY(-2px);
        }

        .prevention-card .prev-num {
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 700;
            color: var(--cinnabar);
            letter-spacing: 0.05em;
            display: block;
            margin-bottom: 10px;
            border-bottom: 2px solid var(--cinnabar);
            padding-bottom: 6px;
            width: fit-content;
        }

        .prevention-card h3 {
            font-family: var(--font-serif);
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .prevention-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA横幅 ===== */
        .cta-banner {
            padding: var(--section-pad) 0;
            background-color: var(--bg-primary);
        }

        .cta-banner .cta-inner {
            background: linear-gradient(135deg, var(--accent) 0%, #b8892e 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .cta-banner .cta-inner::before {
            content: '';
            position: absolute;
            top: -20px;
            right: -20px;
            width: 120px;
            height: 120px;
            border: 2px solid rgba(28, 25, 23, 0.2);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner .cta-inner::after {
            content: '';
            position: absolute;
            bottom: -30px;
            right: 80px;
            width: 60px;
            height: 60px;
            border: 1px solid rgba(28, 25, 23, 0.25);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner h2 {
            font-family: var(--font-serif);
            font-size: 26px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: 0.02em;
            margin-bottom: 4px;
        }

        .cta-banner p {
            font-size: 14px;
            color: rgba(28, 25, 23, 0.7);
            font-weight: 500;
        }

        .cta-btn-dark {
            padding: 12px 28px;
            border-radius: var(--radius-md);
            background: var(--text-dark);
            color: var(--paper);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.03em;
            transition: all 0.3s ease;
            white-space: nowrap;
            z-index: 1;
        }

        .cta-btn-dark:hover {
            background: #2d2925;
            color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: var(--bg-footer);
            border-top: 1px solid var(--border-accent);
            padding-top: 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 32px;
        }

        .footer-logo {
            font-family: var(--font-serif);
            font-size: 20px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.04em;
            margin-bottom: 12px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 260px;
        }

        .footer-heading {
            font-family: var(--font-sans);
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: 0.08em;
            margin-bottom: 14px;
            text-transform: uppercase;
        }

        .footer-col ul,
        .footer-subscribe ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col li {
            margin-bottom: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s ease, padding-left 0.25s ease;
        }

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

        .subscribe-form {
            display: flex;
            gap: 8px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 140px;
            padding: 10px 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-accent);
            background: var(--bg-code);
            color: var(--text-primary);
            font-family: var(--font-sans);
            font-size: 14px;
            outline: none;
            transition: border-color 0.25s ease;
        }

        .subscribe-form input:focus {
            border-color: var(--accent);
        }

        .subscribe-form input::placeholder {
            color: var(--text-secondary);
        }

        .subscribe-form button {
            padding: 10px 20px;
            border-radius: var(--radius-md);
            background: var(--accent);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 14px;
            letter-spacing: 0.03em;
            transition: background-color 0.25s ease;
        }

        .subscribe-form button:hover {
            background: var(--accent-hover);
        }

        .subscribe-note {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .footer-bottom {
            background: #0f0d0c;
            padding: 16px 0;
            border-top: 1px solid rgba(200, 155, 60, 0.15);
        }

        .footer-bottom .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
        }

        .copyright {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .beian {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .footer-links {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 12px;
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 56px;
            }

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

            .hero-image-wrap img {
                height: 240px;
            }

            .diagnostic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .prevention-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

        @media (max-width: 768px) {
            :root {
                --section-pad: 40px;
                --nav-height: 56px;
                --tabs-height: 40px;
            }

            .container {
                padding: 0 16px;
            }

            .nav-search input {
                width: 90px;
            }

            .page-hero {
                padding: 32px 0 28px;
            }

            .page-hero h1 {
                font-size: 27px;
            }

            .hero-stats {
                gap: 20px;
            }

            .hero-stat .stat-num {
                font-size: 22px;
            }

            .hero-image-wrap img {
                height: 200px;
            }

            .section-heading h2 {
                font-size: 22px;
            }

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

            .accordion-header {
                padding: 16px 18px;
            }

            .accordion-header .acc-title {
                font-size: 14px;
            }

            .accordion-body {
                padding: 0 18px;
            }

            .accordion-item.active .accordion-body {
                padding: 0 18px 18px;
            }

            .acc-steps li {
                font-size: 13px;
                padding-left: 28px;
            }

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

            .cta-banner .cta-inner {
                padding: 32px 24px;
            }

            .cta-banner h2 {
                font-size: 21px;
            }

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

            .footer-bottom .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

        @media (max-width: 480px) {
            .nav-search {
                display: none;
            }

            .nav-cta {
                padding: 6px 14px;
                font-size: 13px;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-logo .logo-mark {
                width: 24px;
                height: 24px;
                font-size: 12px;
            }

            .page-hero h1 {
                font-size: 22px;
            }

            .hero-sub {
                font-size: 14px;
            }

            .hero-image-wrap img {
                height: 160px;
            }

            .accordion-header {
                padding: 14px 14px;
                gap: 8px;
            }

            .accordion-header .acc-title {
                font-size: 13px;
            }

            .acc-number {
                font-size: 11px;
            }

            .accordion-header .acc-icon {
                width: 26px;
                height: 26px;
                font-size: 11px;
            }

            .acc-cause,
            .acc-steps li {
                font-size: 13px;
            }

            .error-table th,
            .error-table td {
                padding: 10px 12px;
                font-size: 12px;
            }

            .cta-btn-dark {
                padding: 10px 20px;
                font-size: 14px;
                width: 100%;
                text-align: center;
            }
        }