/* roulang page: index */
:root {
            --bg-page: #F4F1EB;
            --bg-card: #FFFDFA;
            --text-primary: #1D1D1B;
            --text-secondary: #595D57;
            --text-muted: #747A72;
            --border-line: #E1DBD0;
            --brand-primary: #1F5448;
            --brand-deep: #163C34;
            --brand-light: #E2ECE6;
            --accent-copper: #B48455;
            --accent-dark: #85572F;
            --deep-bg: #14221D;
            --error-color: #B64B3A;
            --success-color: #3F7A58;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow-card: 0 1px 0 rgba(20,30,24,0.04);
            --shadow-hover: 0 18px 36px -24px rgba(20,30,24,0.24);
            --transition-color: color 150ms ease;
            --transition-border: border-color 200ms ease;
            --transition-shadow: box-shadow 280ms ease;
        }

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

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

        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background-color: var(--bg-page);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 150ms ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container-site {
            max-width: 1320px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .container-narrow {
            max-width: 860px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-space {
            padding-top: 96px;
            padding-bottom: 96px;
        }

        ::selection {
            background-color: var(--brand-light);
            color: var(--brand-deep);
        }

        /* 链接下划线 */
        .link-underline {
            position: relative;
        }
        .link-underline::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background-color: currentColor;
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 200ms ease;
        }
        .link-underline:hover::after {
            transform: scaleX(1);
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background-color: #FFFDFA;
            border-bottom: 1px solid var(--border-line);
            height: 76px;
        }

        .site-header .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            padding: 8px 4px;
            position: relative;
            transition: color 150ms ease;
            white-space: nowrap;
        }
        .site-header .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background-color: var(--brand-primary);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 200ms ease;
            border-radius: 2px;
        }
        .site-header .nav-link:hover {
            color: var(--brand-deep);
        }
        .site-header .nav-link:hover::after {
            transform: scaleX(1);
        }
        .site-header .nav-link.active {
            color: var(--brand-deep);
            font-weight: 600;
        }
        .site-header .nav-link.active::after {
            transform: scaleX(1);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: var(--brand-primary);
            color: #FFFDFA;
            border: 1px solid var(--brand-primary);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            transition: background-color 150ms ease, box-shadow 280ms ease, border-color 200ms ease;
            line-height: 1.4;
        }
        .btn-primary:hover {
            background-color: var(--brand-deep);
            border-color: var(--brand-deep);
            color: #FFFDFA;
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: var(--shadow-focus);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 500;
            transition: background-color 150ms ease, border-color 200ms ease, box-shadow 280ms ease;
            line-height: 1.4;
        }
        .btn-ghost:hover {
            border-color: var(--brand-primary);
            background-color: rgba(31, 84, 72, 0.04);
        }
        .btn-ghost:focus-visible {
            outline: none;
            box-shadow: var(--shadow-focus);
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--brand-deep);
            transition: color 150ms ease;
        }
        .text-link .arrow {
            transition: transform 150ms ease;
        }
        .text-link:hover .arrow {
            transform: translateX(4px);
        }

        /* 卡片 */
        .feature-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: box-shadow 280ms ease, transform 280ms ease, border-color 200ms ease;
            overflow: hidden;
        }
        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(31, 84, 72, 0.2);
        }

        .content-card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-line);
            border-radius: var(--radius-card);
            transition: box-shadow 280ms ease, transform 280ms ease;
            overflow: hidden;
        }
        .content-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        /* 标签 */
        .tag {
            display: inline-block;
            background-color: var(--brand-light);
            color: var(--brand-deep);
            border-radius: var(--radius-tag);
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 600;
            border: 1px solid transparent;
        }
        .tag-copper {
            background-color: rgba(180, 132, 85, 0.1);
            color: var(--accent-dark);
        }

        .tag-outline {
            background-color: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border-line);
        }

        /* Hero */
        .hero-title {
            font-family: 'Source Han Serif SC', 'Noto Serif CJK SC', 'Songti SC', STSong, SimSun, serif;
            font-weight: 600;
            line-height: 1.15;
            letter-spacing: -0.02em;
        }

        .section-title-serif {
            font-family: 'Source Han Serif SC', 'Noto Serif CJK SC', 'Songti SC', STSong, SimSun, serif;
            font-weight: 600;
            line-height: 1.3;
        }

        .hero-image-frame {
            position: relative;
        }
        .hero-image-frame::before {
            content: '';
            position: absolute;
            top: 14px;
            left: 14px;
            right: -14px;
            bottom: -14px;
            border: 1px solid var(--brand-primary);
            border-radius: 2px;
            z-index: 0;
            pointer-events: none;
        }
        .hero-image-frame img {
            position: relative;
            z-index: 1;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-line);
        }
        .faq-item:first-of-type {
            border-top: 1px solid var(--border-line);
        }
        .faq-summary {
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 28px 0;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            transition: color 150ms ease;
            color: var(--text-primary);
        }
        .faq-summary::-webkit-details-marker {
            display: none;
        }
        .faq-summary:hover {
            color: var(--brand-deep);
        }
        .faq-item[open] .faq-summary {
            color: var(--brand-deep);
        }
        .faq-icon {
            position: relative;
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            border: 1.5px solid var(--brand-primary);
            border-radius: 50%;
            transition: transform 280ms ease, background-color 150ms ease;
            background-color: transparent;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: var(--brand-primary);
            transition: background-color 150ms ease;
        }
        .faq-icon::before {
            width: 8px;
            height: 1.5px;
        }
        .faq-icon::after {
            width: 1.5px;
            height: 8px;
        }
        .faq-item[open] .faq-icon {
            background-color: var(--brand-primary);
        }
        .faq-item[open] .faq-icon::before,
        .faq-item[open] .faq-icon::after {
            background-color: #FFFDFA;
        }
        .faq-item[open] .faq-icon::after {
            transform: translate(-50%, -50%) scaleY(0);
        }
        .faq-answer {
            padding: 0 0 28px 0;
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 720px;
        }

        /* 表单 */
        .form-input {
            width: 100%;
            height: 48px;
            border: 1px solid #D9D3C7;
            border-radius: var(--radius-btn);
            padding: 0 16px;
            font-size: 15px;
            color: var(--text-primary);
            background-color: #FFFDFA;
            transition: border-color 200ms ease, box-shadow 200ms ease;
            outline: none;
        }
        .form-textarea {
            width: 100%;
            border: 1px solid #D9D3C7;
            border-radius: var(--radius-btn);
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text-primary);
            background-color: #FFFDFA;
            transition: border-color 200ms ease, box-shadow 200ms ease;
            outline: none;
            resize: vertical;
            min-height: 96px;
        }
        .form-input:focus,
        .form-textarea:focus {
            border-color: var(--brand-primary);
            box-shadow: 0 0 0 2px rgba(31, 84, 72, 0.15);
        }
        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        /* 滚动条 */
        .scroll-slim::-webkit-scrollbar {
            height: 6px;
            width: 6px;
        }
        .scroll-slim::-webkit-scrollbar-track {
            background: transparent;
        }
        .scroll-slim::-webkit-scrollbar-thumb {
            background-color: rgba(31, 84, 72, 0.3);
            border-radius: 8px;
        }

        /* 数字等宽 */
        .tnum {
            font-variant-numeric: tabular-nums;
            font-feature-settings: 'tnum';
        }

        /* 移动端菜单 */
        .mobile-menu {
            position: fixed;
            top: 76px;
            left: 0;
            right: 0;
            background-color: #FFFDFA;
            border-bottom: 1px solid var(--border-line);
            z-index: 45;
            box-shadow: 0 18px 36px -24px rgba(20, 30, 24, 0.24);
        }
        .mobile-menu a {
            display: flex;
            align-items: center;
            min-height: 48px;
            padding: 0 24px;
            font-size: 16px;
            font-weight: 500;
            border-bottom: 1px solid rgba(225, 219, 208, 0.5);
            transition: background-color 150ms ease;
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }
        .mobile-menu a:hover {
            background-color: rgba(226, 236, 230, 0.5);
        }
        .mobile-menu a.active {
            background-color: var(--brand-light);
            color: var(--brand-deep);
            font-weight: 600;
        }

        .hide-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .hide-scrollbar::-webkit-scrollbar {
            display: none;
        }

        .stat-item {
            text-align: left;
            padding: 20px 0;
        }
        .stat-number {
            font-family: 'Source Han Serif SC', 'Noto Serif CJK SC', serif;
            font-weight: 600;
            font-size: 32px;
            line-height: 1.2;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 虚线空态 */
        .empty-state {
            border: 1px dashed #C9C2B4;
            border-radius: var(--radius-card);
            background-color: rgba(255, 253, 250, 0.6);
            padding: 48px 24px;
            text-align: center;
        }
        .empty-state .empty-text {
            color: var(--text-muted);
            font-size: 15px;
        }

        @media (max-width: 1024px) {
            .section-space {
                padding-top: 72px;
                padding-bottom: 72px;
            }
        }

        @media (max-width: 768px) {
            .section-space {
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .container-site {
                padding-left: 20px;
                padding-right: 20px;
            }
            .hero-title {
                font-size: 36px !important;
            }
            .stat-number {
                font-size: 26px;
            }
        }

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

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

/* roulang page: article */
:root{
    --bg:#F4F1EB; --surface:#FFFDFA; --text:#1D1D1B; --text-2:#595D57; --text-3:#747A72;
    --line:#E1DBD0; --primary:#1F5448; --primary-d:#163C34; --primary-l:#E2ECE6;
    --accent:#B48455; --accent-deep:#85572F; --deep:#14221D; --ok:#3F7A58; --err:#B64B3A;
    --r-card:12px; --r-btn:8px; --r-tag:4px;
    --shadow-card:0 1px 0 rgba(20,30,24,.04);
    --shadow-lift:0 18px 36px -24px rgba(20,30,24,.24);
    --tr-fast:150ms; --tr-mid:280ms;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:var(--bg);color:var(--text);font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans CJK SC','sans-serif';font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  h1,h2,h3,h4{font-family:'Source Han Serif SC','Noto Serif CJK SC','Songti SC','STSong','SimSun','serif';line-height:1.35}
  .container-site{max-width:1280px;margin:0 auto;padding-left:24px;padding-right:24px}
  .article-container{max-width:860px;margin:0 auto;padding-left:24px;padding-right:24px}
  .hero-nav{height:78px}
  .nav-link{position:relative;font-size:15px;font-weight:500;color:#1D1D1B;padding:8px 2px;transition:color var(--tr-fast)}
  .nav-link::after{content:'';position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);border-radius:2px;transition:width var(--tr-mid)}
  .nav-link:hover{color:var(--primary)}
  .nav-link:hover::after{width:100%}
  .nav-link.active{color:var(--primary);font-weight:600}
  .nav-link.active::after{width:100%;background:var(--primary)}
  .btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--primary);color:#FFFDFA;font-weight:600;border-radius:var(--r-btn);padding:12px 24px;border:1px solid transparent;transition:background var(--tr-fast),box-shadow var(--tr-mid),transform var(--tr-mid);cursor:pointer}
  .btn-primary:hover{background:var(--primary-d);box-shadow:0 10px 24px -14px rgba(31,84,72,.9);transform:translateY(-2px)}
  .btn-primary:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
  .btn-ghost{display:inline-flex;align-items:center;gap:8px;background:transparent;color:var(--text);font-weight:600;border:1px solid #D9D3C7;border-radius:var(--r-btn);padding:12px 22px;transition:background var(--tr-fast),box-shadow var(--tr-mid),border-color var(--tr-fast)}
  .btn-ghost:hover{background:rgba(31,84,72,.06);border-color:var(--primary)}
  .btn-ghost:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
  .text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;transition:gap var(--tr-mid),color var(--tr-fast)}
  .text-link:hover{gap:10px;color:var(--primary-d)}
  .tag{display:inline-flex;align-items:center;background:var(--primary-l);color:var(--primary-d);font-size:13px;font-weight:500;padding:5px 14px;border-radius:var(--r-tag);line-height:1.4}
  .tag-copper{background:rgba(180,132,85,.14);color:var(--accent-deep)}
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:var(--text-3)}
  .breadcrumb a{color:var(--text-2);transition:color var(--tr-fast)}
  .breadcrumb a:hover{color:var(--primary)}
  .breadcrumb .sep{color:#BAB2A6}
  .breadcrumb .current{color:var(--text-2);max-width:420px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .article-body{color:#2C2C2A}
  .article-body h2{font-size:28px;font-weight:600;margin-top:2.2em;margin-bottom:.9em;padding-bottom:.4em;border-bottom:1px solid var(--line);letter-spacing:-.01em}
  .article-body h3{font-size:22px;font-weight:600;margin-top:1.8em;margin-bottom:.7em}
  .article-body p{margin:1em 0;line-height:1.95}
  .article-body a{color:var(--primary);border-bottom:1px solid rgba(31,84,72,.4);transition:border-color var(--tr-fast),color var(--tr-fast)}
  .article-body a:hover{border-bottom-color:var(--primary);color:var(--primary-d)}
  .article-body ul,.article-body ol{margin:1.1em 0;padding-left:1.3em;display:grid;gap:.4em}
  .article-body ul li::marker{color:var(--primary)}
  .article-body ol li::marker{color:var(--primary);font-weight:600}
  .article-body blockquote{margin:1.6em 0;background:#FFFDFA;border-left:3px solid var(--accent);padding:16px 20px;color:var(--text-2);border-radius:0 var(--r-card) var(--r-card) 0;font-size:16px}
  .article-body img{border-radius:var(--r-card);margin:1.6em 0;box-shadow:var(--shadow-card)}
  .article-body table{width:100%;margin:1.6em 0;border-collapse:collapse;font-size:15px}
  .article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left}
  .article-body th{background:#EDEBE3;font-weight:600;color:#333}
  .faq-row{border-bottom:1px solid var(--line)}
  .faq-row summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:20px;padding:26px 4px;font-weight:600;font-size:17px;transition:color var(--tr-fast)}
  .faq-row summary::-webkit-details-marker{display:none}
  .faq-row summary::after{content:'+';font-size:24px;font-weight:400;color:var(--primary);transition:transform var(--tr-mid);flex:none}
  .faq-row[open] summary::after{transform:rotate(45deg)}
  .faq-row[open] summary{color:var(--primary)}
  .footer-link{transition:color var(--tr-fast)}
  .footer-link:hover{color:var(--primary);color:#FFFDFA}
  .reveal{transition:opacity 420ms ease,transform 320ms ease}
  @media (max-width:768px){
    .hero-nav{height:70px}
    .container-site{padding-left:16px;padding-right:16px}
    .article-container{padding-left:16px;padding-right:16px}
    .breadcrumb .current{max-width:250px}
    .article-body h2{font-size:24px}
    .article-body h3{font-size:20px}
    .mobile-menu{background:#FFFDFA;border-top:1px solid var(--line);position:fixed;top:70px;left:0;right:0;z-index:100}
    .mobile-menu a{padding-left:16px}
  }
  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{transition:none!important;animation:none!important}
    html{scroll-behavior:auto}
    .reveal{transition:none}
  }

/* roulang page: category1 */
:root {
            --bg-page: #F4F1EB;
            --bg-card: #FFFDFA;
            --text-ink: #1D1D1B;
            --text-soft: #595D57;
            --text-mute: #747A72;
            --line: #E1DBD0;
            --brand-pine: #1F5448;
            --brand-deep: #163C34;
            --brand-light: #E2ECE6;
            --brand-copper: #B48455;
            --brand-copper-deep: #85572F;
            --deep-block: #14221D;
            --success: #3F7A58;
            --danger: #B64B3A;
            --font-display: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, SimSun, serif;
            --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg-page);
            color: var(--text-ink);
            font-family: var(--font-body);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button,
        input,
        select,
        textarea {
            font: inherit;
        }

        .container-site {
            width: min(1280px, calc(100% - 2rem));
            margin-left: auto;
            margin-right: auto;
        }

        @media (min-width: 768px) {
            .container-site {
                width: min(1280px, calc(100% - 3rem));
            }
        }

        .font-display {
            font-family: var(--font-display);
            font-weight: 600;
            letter-spacing: -0.01em;
            line-height: 1.25;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 0.15rem;
            font-size: 0.94rem;
            font-weight: 500;
            color: var(--text-ink);
            transition: color 150ms ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            height: 2px;
            width: 100%;
            background: var(--brand-pine);
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 280ms ease;
        }

        .nav-link:hover {
            color: var(--brand-deep);
        }

        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: var(--brand-pine);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            border-radius: 8px;
            padding: 0.8rem 1.5rem;
            font-weight: 600;
            font-size: 0.95rem;
            line-height: 1.4;
            border: 1px solid transparent;
            cursor: pointer;
            transition: background-color 150ms ease, border-color 200ms ease, box-shadow 280ms ease, transform 280ms ease;
        }

        .btn-primary {
            background: var(--brand-pine);
            color: #FFFDFA;
            box-shadow: 0 1px 0 rgba(20, 30, 24, 0.06);
        }

        .btn-primary:hover {
            background: var(--brand-deep);
            box-shadow: 0 16px 28px -20px rgba(20, 30, 24, 0.45);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            background: #102D26;
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background: transparent;
            color: var(--brand-deep);
            border-color: #C9C0B2;
        }

        .btn-secondary:hover {
            border-color: var(--brand-pine);
            background: rgba(31, 84, 72, 0.08);
        }

        .btn-ghost {
            background: rgba(255, 253, 250, 0.06);
            color: #E9F0EB;
            border-color: rgba(255, 255, 255, 0.18);
        }

        .btn-ghost:hover {
            background: rgba(255, 253, 250, 0.12);
            border-color: rgba(255, 255, 255, 0.55);
        }

        .text-link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            font-weight: 600;
            color: var(--brand-deep);
            transition: color 150ms ease;
        }

        .text-link-arrow .arrow {
            transition: transform 280ms ease;
        }

        .text-link-arrow:hover .arrow {
            transform: translateX(4px);
        }

        .card-surface {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: 12px;
            box-shadow: 0 1px 0 rgba(20, 30, 24, 0.04);
            transition: box-shadow 280ms ease, transform 280ms ease, border-color 200ms ease;
        }

        .card-surface:hover {
            border-color: rgba(31, 84, 72, 0.22);
            box-shadow: 0 18px 36px -24px rgba(20, 30, 24, 0.24);
            transform: translateY(-3px);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            padding: 0.2rem 0.65rem;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--brand-light);
            color: var(--brand-deep);
        }

        .badge-copper {
            background: rgba(180, 132, 85, 0.14);
            color: var(--brand-copper-deep);
        }

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

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.35rem 0;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text-ink);
            transition: color 150ms ease;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: var(--brand-pine);
        }

        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 1.6rem;
            height: 1.6rem;
            flex: 0 0 auto;
            border-radius: 50%;
            border: 1px solid var(--line);
            color: var(--brand-copper-deep);
            background: rgba(180, 132, 85, 0.06);
            transition: transform 280ms ease, background-color 150ms ease, border-color 180ms ease;
        }

        details[open] .faq-icon {
            transform: rotate(45deg);
            background: rgba(31, 84, 72, 0.08);
            border-color: rgba(31, 84, 72, 0.2);
            color: var(--brand-pine);
        }

        .faq-answer {
            padding: 0 0.2rem 1.5rem 0;
            color: var(--text-soft);
            max-width: 68ch;
        }

        .form-input {
            width: 100%;
            height: 48px;
            border: 1px solid #D9D3C7;
            border-radius: 8px;
            background: #FFFDFA;
            padding: 0 0.9rem;
            color: var(--text-ink);
            transition: border-color 200ms ease, box-shadow 200ms ease, background-color 150ms ease;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--brand-pine);
            box-shadow: 0 0 0 3px rgba(31, 84, 72, 0.14);
            background: #fff;
        }

        .form-input::placeholder {
            color: #A6AAA4;
        }

        .form-label {
            display: block;
            margin-bottom: 0.45rem;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-ink);
        }

        .record-item {
            border: 1px solid var(--line);
            background: rgba(255, 253, 250, 0.6);
            border-radius: 12px;
            padding: 1.1rem 1.2rem;
            transition: border-color 200ms ease, background-color 150ms ease;
        }

        .record-item:hover {
            border-color: rgba(31, 84, 72, 0.24);
            background: rgba(255, 253, 250, 0.92);
        }

        .mobile-panel {
            max-height: 0;
            overflow: hidden;
            opacity: 0;
            transition: max-height 320ms ease, opacity 200ms ease;
        }

        .mobile-panel.open {
            max-height: 680px;
            opacity: 1;
        }

        .mobile-menu-link {
            display: flex;
            align-items: center;
            min-height: 48px;
            font-size: 1.05rem;
            font-weight: 500;
            border-bottom: 1px solid #EAE5DB;
            padding: 0 0.25rem;
            transition: background-color 150ms ease, color 150ms ease;
        }

        .mobile-menu-link.active {
            background: var(--brand-light);
            color: var(--brand-deep);
            font-weight: 600;
            padding-left: 0.75rem;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid rgba(180, 132, 85, 0.85);
            outline-offset: 2px;
            border-radius: 6px;
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
                scroll-behavior: auto !important;
            }
        }
        .peer-img {
            transition: transform 500ms ease;
        }
        .img-zoom:hover .peer-img {
            transform: scale(1.03);
        }

/* roulang page: category2 */
:root {
        --canvas: #F4F1EB;
        --card: #FFFDFA;
        --ink: #1D1D1B;
        --secondary: #595D57;
        --muted: #747A72;
        --line: #E1DBD0;
        --pine: #1F5448;
        --pine-deep: #163C34;
        --pine-light: #E2ECE6;
        --copper: #B48455;
        --copper-deep: #85572F;
        --deep-block: #14221D;
        --safe: #3F7A58;
        --alert: #B64B3A;
    }

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

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

    body {
        margin: 0;
        background: var(--canvas);
        color: var(--ink);
        font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
        line-height: 1.8;
        -webkit-font-smoothing: antialiased;
    }

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

    a {
        color: inherit;
        text-decoration: none;
        transition: color 150ms ease, border-color 200ms ease, opacity 150ms ease;
    }

    button,
    input,
    textarea,
    select {
        font: inherit;
    }

    .container-site {
        width: 100%;
        max-width: 1320px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    @media (max-width: 640px) {
        .container-site {
            padding-left: 16px;
            padding-right: 16px;
        }
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 60;
        background: rgba(255, 253, 250, 0.92);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--line);
    }

    .nav-link {
        position: relative;
        display: inline-flex;
        align-items: center;
        gap: .45rem;
        padding: .45rem .1rem;
        font-size: .95rem;
        font-weight: 500;
        color: var(--ink);
    }

    .nav-link::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 2px;
        background: var(--pine);
        transform: scaleX(0);
        transform-origin: left center;
        transition: transform 250ms ease;
    }

    .nav-link:hover {
        color: var(--pine-deep);
    }

    .nav-link:hover::after {
        transform: scaleX(1);
    }

    .nav-link.active {
        color: var(--pine-deep);
    }

    .nav-link.active::after {
        transform: scaleX(1);
    }

    .logo-mark {
        font-family: 'Source Han Serif SC', 'Noto Serif CJK SC', 'Songti SC', STSong, SimSun, serif;
        color: var(--ink);
        letter-spacing: .02em;
    }

    .h1-hero,
    .section-title {
        font-family: 'Source Han Serif SC', 'Noto Serif CJK SC', 'Songti SC', 'STSong', 'SimSun', serif;
        font-weight: 600;
        letter-spacing: -.01em;
        color: var(--pine-deep);
    }

    .h1-hero {
        font-size: clamp(42px, 5vw, 56px);
        line-height: 1.2;
        letter-spacing: .01em;
    }

    .dark-h1 {
        color: #FFFDFA;
    }

    .section-title {
        font-size: clamp(26px, 3.4vw, 40px);
        line-height: 1.25;
    }

    .section-lead {
        color: var(--secondary);
        font-size: 16.5px;
        line-height: 1.85;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: .5rem;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: .14em;
        text-transform: uppercase;
        color: var(--copper-deep);
    }

    .eyebrow::before {
        content: '';
        display: block;
        width: 22px;
        height: 1px;
        background: var(--copper);
    }

    .eyebrow-center {
        justify-content: center;
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: .55rem;
        min-height: 46px;
        padding: .68rem 1.35rem;
        border-radius: 8px;
        background: var(--pine);
        border: 1px solid var(--pine);
        color: #FFFDFA;
        font-weight: 600;
        font-size: .95rem;
        margin: 0;
        transition: background-color 150ms ease, border-color 150ms ease, box-shadow 200ms ease;
    }

    .btn-primary:hover {
        background: var(--pine-deep);
        border-color: var(--pine-deep);
        box-shadow: 0 12px 26px -16px rgba(22, 60, 52, 0.5);
    }

    .btn-primary:focus-visible {
        outline: 2px solid var(--copper);
        outline-offset: 3px;
    }

    .btn-ghost {
        display: inline-flex;
        align-items: center;
        gap: .5rem;
        font-weight: 600;
        color: #FFFDFA;
        border: 1px solid rgba(255, 253, 250, .35);
        border-radius: 8px;
        padding: .68rem 1.3rem;
        background: transparent;
        transition: background-color 150ms ease, border-color 200ms ease;
    }

    .btn-ghost .arrow-ico {
        transition: transform 200ms ease;
    }

    .btn-ghost:hover {
        background: rgba(255, 253, 250, .08);
        border-color: rgba(255, 253, 250, .6);
    }

    .btn-ghost:hover .arrow-ico {
        transform: translateX(4px);
    }

    .btn-ghost:focus-visible {
        outline: 2px solid var(--copper);
        outline-offset: 3px;
    }

    .dark-zone {
        background: var(--deep-block);
        color: #D3DFD6;
    }

    .theme-rule {
        border: none;
        border-top: 1px solid var(--line);
        margin: 0;
    }

    .lift-card {
        background: var(--card);
        border: 1px solid var(--line);
        border-radius: 12px;
        box-shadow: var(--shadow-card, 0 1px 0 rgba(20, 30, 24, 0.04));
        transition: transform 280ms cubic-bezier(.2, .8, .25, 1), box-shadow 280ms ease, border-color 200ms ease;
    }

    .lift-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 18px 36px -24px rgba(20, 30, 24, 0.24);
        border-color: rgba(31, 84, 72, .25);
    }

    .stage-frame {
        background: var(--deep-block);
        border-radius: 2px;
    }

    .stage-frame img {
        mix-blend-mode: screen;
        opacity: .92;
    }

    .check-item {
        background: rgba(255, 253, 250, .055);
        border: 1px solid rgba(255, 253, 250, .1);
        border-radius: 12px;
    }

    .check-item:hover {
        border-color: rgba(180, 132, 85, .7);
        background: rgba(255, 253, 250, .09);
    }

    .site-footer {
        background: var(--deep-block);
        color: #BCCCC0;
    }

    .site-footer a {
        position: relative;
        color: inherit;
        transition: color 200ms ease;
    }

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

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

    .faq-item details {
        padding: 1.2rem 0;
        position: relative;
    }

    .faq-item summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        cursor: pointer;
        list-style: none;
        color: var(--ink);
        font-weight: 600;
        font-size: 17px;
        line-height: 1.5;
        transition: color 200ms ease;
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary:hover {
        color: var(--pine-deep);
    }

    .faq-icon {
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        width: 30px;
        height: 30px;
        border-radius: 50%;
        border: 1px solid var(--line);
        color: var(--pine);
        transition: transform 250ms ease, border-color 250ms ease, background-color 200ms ease;
    }

    .faq-item details[open] .faq-icon {
        transform: rotate(45deg);
        border-color: var(--copper);
        background: var(--copper);
        color: white;
    }

    .faq-answer {
        color: var(--secondary);
        font-size: 15.5px;
        line-height: 1.85;
        padding: 1rem 0 .2rem;
        max-width: 860px;
    }

    .faq-item:last-child {
        border-bottom: 0;
    }

    .field-label {
        display: block;
        font-size: .9rem;
        font-weight: 500;
        color: var(--ink);
        margin-bottom: .4rem;
    }

    .text-input,
    .text-area {
        width: 100%;
        border: 1px solid #D9D3C7;
        border-radius: 8px;
        background: #FFFDFA;
        padding: .72rem .9rem;
        color: var(--ink);
        font-size: .95rem;
        min-height: 48px;
    }

    .text-input:focus,
    .text-area:focus {
        outline: none;
        border-color: var(--pine);
        box-shadow: 0 0 0 3px rgba(31, 84, 72, .12);
    }

    .meta-panel-item {
        display: flex;
        gap: .8rem;
        align-items: flex-start;
        padding: .7rem 0;
        border-top: 1px solid rgba(255, 253, 250, .1);
    }

    .meta-panel-item:first-child {
        border-top: none;
    }

    .simple-table {
        width: 100%;
        border-collapse: collapse;
        background: var(--card);
    }

    .simple-table th {
        background: var(--pine-deep);
        color: #FFFDFA;
        text-align: left;
        padding: 1rem 1.1rem;
        font-weight: 600;
        font-size: .95rem;
        border-bottom: none;
    }

    .simple-table td {
        padding: 1rem 1.1rem;
        border-bottom: 1px solid var(--line);
        font-size: .95rem;
        color: var(--secondary);
        vertical-align: top;
    }

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

    .simple-table td:first-child {
        color: var(--ink);
        font-weight: 600;
    }

    @media (max-width: 640px) {
        .container-site {
            padding-left: 16px;
            padding-right: 16px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        *,
        *::before,
        *::after {
            animation-duration: .01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: .01ms !important;
            scroll-behavior: auto !important;
        }
    }

    .selected-text {
        font-family: 'Source Han Serif SC', 'Noto Serif CJK SC', Songti SC, serif;
        color: #BDCCBF;
        border-left: 4px solid var(--copper);
        padding-left: 1.3rem;
    }

    .bg-shadow-texture {
        background:
            linear-gradient(90deg, rgba(22, 60, 52, 0.96) 0%, rgba(22, 60, 52, 0.92) 52%, rgba(22, 60, 52, 0.62) 100%);
    }

/* roulang page: category3 */
:root {
            --canvas: #F4F1EB;
            --card: #FFFDFA;
            --pine: #1F5448;
            --pine-dark: #163C34;
            --pine-light: #E2ECE6;
            --copper: #B48455;
            --copper-text: #85572F;
            --deep: #14221D;
            --ink: #1D1D1B;
            --sub: #595D57;
            --muted: #747A72;
            --line: #E1DBD0;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow-card: 0 1px 0 rgba(20, 30, 24, 0.04);
            --shadow-hover: 0 18px 36px -24px rgba(20, 30, 24, 0.24);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--canvas);
            color: var(--ink);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        .container-site {
            max-width: 1320px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .font-editorial {
            font-family: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, SimSun, serif;
            font-weight: 600;
            letter-spacing: -0.01em;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.15s ease;
        }

        button {
            font-family: inherit;
        }

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 2px;
            color: #1D1D1B;
            transition: color .15s ease;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            height: 2px;
            background: var(--pine);
            width: 0;
            transition: width .2s ease;
        }

        .nav-link:hover::after,
        .nav-link:focus-visible::after {
            width: 100%;
        }

        .nav-link.active::after {
            width: 100%;
            background: var(--pine);
        }

        .nav-link.active {
            color: var(--pine-dark);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: var(--pine);
            color: #FFFDFA;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 12px 22px;
            transition: background .15s ease, transform .15s ease, box-shadow .2s ease;
        }

        .btn-primary:hover {
            background: #153E34;
            box-shadow: 0 8px 24px -12px rgba(31, 84, 72, 0.5);
            transform: translateY(-1px);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--pine);
            outline-offset: 3px;
        }

        .btn-copper {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: var(--copper);
            color: #fff;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 12px 22px;
            transition: background .15s ease, transform .15s ease, box-shadow .2s ease;
        }

        .btn-copper:hover {
            background: #9d6f45;
            box-shadow: 0 8px 24px -12px rgba(180, 132, 85, 0.5);
            transform: translateY(-1px);
        }

        .btn-copper:focus-visible {
            outline: 2px solid var(--copper);
            outline-offset: 3px;
        }

        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--pine-dark);
        }

        .link-arrow span {
            transition: transform .25s ease;
        }

        .link-arrow:hover span,
        .link-arrow:focus-visible span {
            transform: translateX(4px);
        }

        .tag {
            display: inline-block;
            background: var(--pine-light);
            color: var(--pine-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 10px;
            border-radius: var(--radius-tag);
            letter-spacing: .04em;
        }

        .tag-copper {
            background: #F1E5DA;
            color: var(--copper-text);
        }

        .hero-bg {
            background-image: linear-gradient(90deg, rgba(20, 34, 29, .9) 0%, rgba(31, 84, 72, .68) 100%, transparent 100%),
                url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
        }

        .dark-veil {
            background: rgba(20, 34, 29, .62);
        }

        .card-elevated {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: transform .28s ease, box-shadow .28s ease, border-color .2s ease;
        }

        .card-elevated:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: #cfc7b8;
        }

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

        .step-card {
            border-top: 1px solid rgba(255, 255, 255, .14);
            background: rgba(255, 255, 255, .02);
            border-radius: 0;
            padding: 2px 0;
        }

        .step-num {
            font-family: Georgia, "Times New Roman", serif;
            font-size: 32px;
            line-height: 1;
            color: rgba(255, 255, 255, .55);
        }

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

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 28px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 24px;
            font-size: 17px;
            font-weight: 600;
            transition: color .15s ease;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:focus-visible {
            outline: 2px solid var(--pine);
            outline-offset: 4px;
            border-radius: 6px;
        }

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

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--pine);
            border-radius: 2px;
            transition: transform .2s ease;
        }

        .faq-icon::before {
            left: 4px;
            right: 4px;
            top: 9px;
            height: 2px;
        }

        .faq-icon::after {
            top: 4px;
            bottom: 4px;
            left: 9px;
            width: 2px;
        }

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

        .faq-answer {
            padding-bottom: 28px;
            color: var(--sub);
            max-width: 820px;
            line-height: 1.9;
        }

        .quick-list {
            border-left: 1px solid var(--line);
            padding-left: 24px;
        }

        .quick-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 16px 0;
            border-bottom: 1px solid var(--line);
        }

        .quick-list li:last-child {
            border-bottom: 0;
        }

        .quick-dot {
            width: 8px;
            height: 8px;
            border-radius: 100%;
            background: var(--copper);
            margin-top: 9px;
            flex-shrink: 0;
        }

        .footer-link {
            display: inline-block;
            font-size: 14px;
            color: #93A59A;
            transition: color .15s ease;
        }

        .footer-link:hover,
        .footer-link:focus-visible {
            color: #F4F1EB;
            outline: none;
        }

        .footer-title {
            color: #F4F1EB;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .12em;
            text-transform: uppercase;
        }

        @media (max-width: 1024px) {
            .container-site {
                padding-left: 20px;
                padding-right: 20px;
            }

            .step-num {
                font-size: 28px;
            }
        }

        @media (max-width: 639px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }

            .faq-item summary {
                padding: 22px 0;
                font-size: 16px;
            }

            .faq-answer {
                padding-bottom: 24px;
            }
        }

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

/* roulang page: category4 */
:root {
        --bg: #F4F1EB;
        --card: #FFFDFA;
        --ink: #1D1D1B;
        --muted: #595D57;
        --weak: #747A72;
        --line: #E1DBD0;
        --pine: #1F5448;
        --pine-dark: #163C34;
        --pine-light: #E2ECE6;
        --copper: #B48455;
        --deep: #14221D;
    }

    * {
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        background: var(--bg);
        color: var(--ink);
        font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
    }

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

    a {
        color: inherit;
        text-decoration: none;
        transition: color 150ms ease, border-color 150ms ease, background 150ms ease, opacity 150ms ease;
    }

    button,
    input,
    select,
    textarea {
        font: inherit;
        color: inherit;
    }

    .container-site {
        max-width: 1320px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 1.25rem;
        padding-right: 1.25rem;
    }

    @media (min-width: 768px) {
        .container-site {
            padding-left: 1.75rem;
            padding-right: 1.75rem;
        }
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: #FFFDFA;
        border-bottom: 1px solid var(--line);
    }

    .logo-mark {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: 10px;
        background: var(--pine);
        color: #FFFDFA;
        font-weight: 800;
        font-size: 19px;
        line-height: 1;
        transition: background 150ms ease, transform 280ms ease;
    }

    .logo-mark:hover {
        background: var(--pine-dark);
        transform: translateY(-1px);
    }

    .nav-link {
        position: relative;
        display: inline-flex;
        align-items: center;
        min-height: 44px;
        font-size: 15px;
        font-weight: 500;
        color: #1D1D1B;
        transition: color 150ms ease;
    }

    .nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 8px;
        height: 2px;
        width: 0;
        background: var(--pine);
        border-radius: 999px;
        transition: width 200ms ease;
    }

    .nav-link:hover {
        color: var(--pine-dark);
    }

    .nav-link:hover::after,
    .nav-link:focus-visible::after {
        width: 100%;
    }

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

    .nav-link.active::after {
        width: 100%;
        background: var(--pine);
    }

    .mobile-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        padding: 16px 24px 28px;
        background: #FFFDFA;
        border-bottom: 1px solid var(--line);
        box-shadow: 0 24px 40px -32px rgba(20, 30, 24, 0.4);
    }

    .mobile-nav a {
        display: flex;
        align-items: center;
        min-height: 48px;
        padding: 0 16px;
        border-radius: 8px;
        font-weight: 600;
        color: var(--ink);
    }

    .mobile-nav a:hover {
        background: #F4F1EB;
        color: var(--pine-dark);
    }

    .mobile-nav a.active {
        background: var(--pine-light);
        color: var(--pine-dark);
    }

    .mobile-nav .btn-primary {
        margin-top: 12px;
        justify-content: center;
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        min-height: 46px;
        padding: 0 22px;
        border: 1px solid var(--pine);
        border-radius: 8px;
        background: var(--pine);
        color: #FFFDFA;
        font-weight: 700;
        font-size: 14px;
        line-height: 1;
        box-shadow: 0 8px 20px -14px rgba(31, 84, 72, 0.9);
        transition: background 150ms ease, border-color 150ms ease, transform 280ms ease, box-shadow 280ms ease;
    }

    .btn-primary:hover {
        background: var(--pine-dark);
        border-color: var(--pine-dark);
        transform: translateY(-2px);
        box-shadow: 0 14px 28px -16px rgba(31, 84, 72, 0.7);
    }

    .btn-primary:active {
        transform: translateY(0);
        box-shadow: none;
    }

    .btn-primary:focus-visible,
    .btn-ghost:focus-visible,
    a:focus-visible,
    button:focus-visible {
        outline: 2px solid var(--copper);
        outline-offset: 3px;
    }

    .btn-ghost {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        min-height: 46px;
        padding: 0 22px;
        border: 1px solid rgba(255, 253, 250, 0.4);
        border-radius: 8px;
        background: rgba(255, 253, 250, 0.06);
        color: #FFFDFA;
        font-weight: 600;
        font-size: 14px;
        transition: background 150ms ease, border-color 150ms ease, transform 280ms ease;
    }

    .btn-ghost:hover {
        background: rgba(255, 253, 250, 0.14);
        border-color: rgba(255, 253, 250, 0.8);
        transform: translateY(-2px);
    }

    .category-hero {
        background-image: linear-gradient(108deg, #14221D 0%, rgba(20, 34, 29, 0.88) 42%, rgba(20, 34, 29, 0.5) 100%), url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        color: #FFFDFA;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 0.12em;
        color: #D4B28D;
        text-transform: uppercase;
    }

    .eyebrow::before {
        content: "";
        width: 22px;
        height: 2px;
        background: var(--copper);
        border-radius: 2px;
    }

    .breadcrumb-item {
        font-size: 13px;
        color: rgba(255, 253, 250, 0.8);
    }

    .breadcrumb-item a:hover {
        color: #FFFDFA;
    }

    .breadcrumb-item .crumb-current {
        color: rgba(255, 253, 250, 0.55);
    }

    .doc-row {
        display: grid;
        gap: 12px;
        padding: 26px 2px;
        border-bottom: 1px solid var(--line);
        transition: padding-left 200ms ease;
    }

    .doc-row:hover {
        padding-left: 12px;
    }

    @media (min-width: 768px) {
        .doc-row {
            grid-template-columns: 90px 1fr 260px;
            gap: 28px;
            align-items: start;
        }
    }

    .doc-index {
        font-family: "Source Han Serif SC", "Noto Serif CJK SC", Songti SC, STSong, SimSun, serif;
        color: var(--copperdark);
        font-size: 26px;
        line-height: 1.3;
        letter-spacing: -0.02em;
    }

    .tag-chip {
        display: inline-flex;
        align-items: center;
        padding: 2px 10px;
        border-radius: 4px;
        background: #F0E8DD;
        color: var(--copperdark);
        font-size: 12px;
        font-weight: 600;
    }

    .dark-boundary-list {
        display: grid;
        gap: 0;
        border-top: 1px solid rgba(255, 253, 250, 0.12);
    }

    .dark-boundary-list .list-cell {
        padding: 18px 0;
        border-bottom: 1px solid rgba(255, 253, 250, 0.12);
    }

    .step-card {
        position: relative;
        border-radius: 12px;
        padding: 30px 28px 28px;
        background: #FFFDFA;
        border: 1px solid var(--line);
        box-shadow: 0 1px 0 rgba(20, 30, 24, 0.04);
        transition: transform 280ms ease, box-shadow 280ms ease, border-color 200ms ease;
    }

    .step-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 18px 36px -24px rgba(20, 30, 24, 0.24);
        border-color: #CFC7B9;
    }

    .card-img {
        overflow: hidden;
        border-radius: 12px;
        border: 1px solid var(--line);
        background: #FFFDFA;
        box-shadow: 0 1px 0 rgba(20, 30, 24, 0.04);
        transition: transform 280ms ease, box-shadow 280ms ease;
    }

    .card-img:hover {
        transform: translateY(-4px);
        box-shadow: 0 18px 36px -24px rgba(20, 30, 24, 0.24);
    }

    .card-img .card-img-media {
        overflow: hidden;
        position: relative;
    }

    .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 480ms ease;
    }

    .card-img:hover img {
        transform: scale(1.03);
    }

    .image-frame {
        position: relative;
        border-radius: 2px;
        border: 1px solid rgba(31, 84, 72, 0.28);
        background: #E2ECE6;
    }

    .image-frame::after {
        content: "";
        position: absolute;
        top: -9px;
        right: -9px;
        width: 48px;
        height: 48px;
        border-top: 2px solid var(--copper);
        border-right: 2px solid var(--copper);
        border-radius: 0 6px 0 0;
        pointer-events: none;
    }

    .check-item {
        position: relative;
        padding-left: 28px;
    }

    .check-item::before {
        content: "";
        position: absolute;
        left: 0;
        top: 9px;
        width: 16px;
        height: 16px;
        border-radius: 50%;
        border: 1.5px solid var(--pine);
        background: var(--pine-light);
    }

    .check-item::after {
        content: "";
        position: absolute;
        left: 4px;
        top: 14px;
        width: 8px;
        height: 4px;
        border-left: 2px solid var(--pine);
        border-bottom: 2px solid var(--pine);
        transform: rotate(-45deg);
    }

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

    .faq-panel:first-of-type {
        border-top: 1px solid var(--line);
    }

    .faq-panel summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        padding: 22px 4px;
        font-size: 16px;
        font-weight: 700;
        color: var(--ink);
        cursor: pointer;
        list-style: none;
        transition: color 150ms ease;
        min-height: 48px;
    }

    .faq-panel summary::-webkit-details-marker {
        display: none;
    }

    .faq-panel summary:hover {
        color: var(--pine-dark);
    }

    .faq-panel summary .faq-icon {
        flex: 0 0 auto;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        border: 1px solid var(--line);
        background: #FFFDFA;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        position: relative;
        transition: background 150ms ease, border-color 150ms ease, transform 200ms ease;
    }

    .faq-panel summary .faq-icon::before,
    .faq-panel summary .faq-icon::after {
        content: "";
        position: absolute;
        background: var(--pine);
        border-radius: 2px;
        transition: background 150ms ease;
    }

    .faq-panel summary .faq-icon::before {
        width: 10px;
        height: 1.5px;
    }

    .faq-panel summary .faq-icon::after {
        width: 1.5px;
        height: 10px;
    }

    .faq-panel[open] summary {
        color: var(--pine-dark);
    }

    .faq-panel[open] summary .faq-icon {
        background: var(--pine);
        border-color: var(--pine);
        transform: rotate(45deg);
    }

    .faq-panel[open] summary .faq-icon::before,
    .faq-panel[open] summary .faq-icon::after {
        background: #FFFDFA;
    }

    .faq-answer {
        padding: 0 42px 24px 4px;
        color: var(--muted);
        font-size: 15px;
        line-height: 1.9;
    }

    .field-label {
        display: block;
        margin-bottom: 8px;
        font-size: 14px;
        font-weight: 600;
        color: var(--ink);
    }

    .field-input {
        display: block;
        width: 100%;
        min-height: 48px;
        padding: 11px 14px;
        background: #FFFDFA;
        border: 1px solid #D9D3C7;
        border-radius: 8px;
        color: var(--ink);
        transition: border-color 200ms ease, box-shadow 200ms ease;
    }

    .field-input:focus {
        outline: none;
        border-color: var(--pine);
        box-shadow: 0 0 0 4px rgba(31, 84, 72, 0.12);
    }

    .field-input::placeholder {
        color: #9A9A8F;
    }

    .deep-footer-link {
        transition: color 150ms ease;
    }

    .deep-footer-link:hover {
        color: #FFFDFA;
    }

    .content-card {
        border: 1px solid rgba(255, 253, 250, 0.1);
        border-radius: 12px;
        background: rgba(255, 253, 250, 0.04);
        padding: 22px;
        transition: background 150ms ease, border-color 150ms ease;
    }

    .content-card:hover {
        background: rgba(255, 253, 250, 0.08);
        border-color: rgba(255, 253, 250, 0.22);
    }

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