/* roulang page: index */
:root{
      --ink:#202321;
      --muted:#737874;
      --paper:#f6f4ef;
      --warm:#fffdf8;
      --line:#dedbd3;
      --accent:#b47745;
      --accent-dark:#81502f;
      --green:#30463d;
      --shadow:0 18px 50px rgba(32,35,33,.09);
      --radius:7px;
      --max:1180px;
    }
    *{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth}
    body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    img{max-width:100%;display:block}
    :focus-visible{outline:3px solid rgba(180,119,69,.45);outline-offset:3px}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .topbar{background:var(--warm);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
    .brand-row{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:13px;font-weight:900;letter-spacing:0;font-size:20px}
    .brand-mark{width:37px;height:37px;background:var(--green);color:#f5eee2;display:grid;place-items:center;border-radius:50%;font-size:14px}
    .brand small{display:block;color:var(--muted);font-size:11px;font-weight:500;line-height:1.2;margin-top:2px}
    .utility{display:flex;align-items:center;gap:18px;color:var(--muted);font-size:13px}
    .utility a:hover{color:var(--accent-dark)}
    .age-note{border-left:1px solid var(--line);padding-left:18px}
    .channel-bar{border-top:1px solid #ece9e1;background:rgba(255,253,248,.95)}
    .channels{display:flex;align-items:center;gap:30px;height:48px;overflow-x:auto;white-space:nowrap;scrollbar-width:none}
    .channels::-webkit-scrollbar{display:none}
    .channel{height:48px;display:inline-flex;align-items:center;color:var(--muted);font-size:14px;position:relative}
    .channel:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--accent);transition:width .25s}
    .channel:hover,.channel.active{color:var(--ink)}
    .channel:hover:after,.channel.active:after{width:100%}
    .hero{background:var(--green);color:#f7f2e9;min-height:575px;position:relative;overflow:hidden}
    .hero:before{content:"91";position:absolute;right:-15px;bottom:-120px;font-size:430px;line-height:1;font-weight:900;color:rgba(255,255,255,.035);letter-spacing:-28px}
    .hero-inner{min-height:575px;display:grid;grid-template-columns:1.03fr .97fr;align-items:center;gap:70px;position:relative;z-index:1;padding:70px 0}
    .eyebrow{color:#d7b08a;letter-spacing:2px;font-size:12px;font-weight:700;margin-bottom:20px}
    h1{font-size:clamp(44px,6vw,82px);line-height:1.08;letter-spacing:0;font-weight:950;max-width:640px}
    .hero-copy{color:#d8ded8;max-width:570px;font-size:17px;margin:27px 0 31px}
    .actions{display:flex;flex-wrap:wrap;align-items:center;gap:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:47px;padding:0 22px;border-radius:var(--radius);font-weight:800;font-size:14px;transition:.22s ease}
    .btn-primary{background:#d39a68;color:#241a12}
    .btn-primary:hover{background:#e1ad7d;transform:translateY(-2px)}
    .btn-light{border:1px solid rgba(255,255,255,.35);color:#fff}
    .btn-light:hover{background:rgba(255,255,255,.1);border-color:#fff}
    .hero-meta{display:flex;gap:26px;margin-top:39px;color:#bcc8c0;font-size:12px}
    .hero-meta strong{display:block;color:#fff;font-size:23px;line-height:1.2}
    .hero-board{background:#e9e4da;color:var(--ink);padding:26px;border-radius:var(--radius);box-shadow:var(--shadow);transform:rotate(1.3deg)}
    .board-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #cfc9bd;padding-bottom:17px;margin-bottom:18px}
    .board-head b{font-size:18px}.board-head span{font-size:11px;color:var(--accent-dark)}
    .board-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .board-item{background:var(--warm);padding:17px 15px;min-height:112px;border:1px solid #ddd8ce;border-radius:5px;transition:.2s}
    .board-item:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(32,35,33,.08)}
    .board-item i{font-style:normal;color:var(--accent);font-size:11px;font-weight:800}
    .board-item strong{display:block;font-size:16px;margin:9px 0 4px}
    .board-item span{color:var(--muted);font-size:12px}
    .section{padding:92px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:28px}
    .section-kicker{color:var(--accent-dark);font-size:12px;font-weight:800;letter-spacing:1.5px;margin-bottom:8px}
    h2{font-size:34px;line-height:1.2;letter-spacing:0}
    .section-intro{max-width:500px;color:var(--muted);font-size:14px}
    .rail-wrap{overflow:hidden}
    .rail{display:flex;gap:16px;overflow-x:auto;cursor:grab;padding:4px 0 18px;scrollbar-width:thin;scrollbar-color:var(--accent) transparent}
    .rail:active{cursor:grabbing}
    .rail-card{flex:0 0 285px;background:var(--warm);border:1px solid var(--line);border-radius:var(--radius);padding:20px;min-height:205px;transition:.25s}
    .rail-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:var(--shadow)}
    .number{font-size:42px;color:#d5cec2;font-weight:900;line-height:1}
    .rail-card h3{font-size:19px;margin:17px 0 7px}
    .rail-card p,.feature p,.topic-card p,.news-list a{font-size:13px;color:var(--muted)}
    .rail-tag,.tag{display:inline-block;color:var(--accent-dark);font-size:11px;font-weight:800;border-bottom:1px solid #cba47e;padding-bottom:2px}
    .dark-section{background:#252a27;color:#f5f0e8}
    .dark-section .section-intro{color:#b8c0b9}
    .recommend-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .recommend{border:1px solid rgba(255,255,255,.16);padding:22px 18px;min-height:220px;position:relative;background:#303632}
    .recommend:hover{background:#39423c;border-color:#c4966d}
    .recommend .rank{color:#d4a77c;font-size:12px;font-weight:800}
    .recommend h3{font-size:20px;margin:44px 0 9px}
    .recommend p{font-size:12px;color:#bdc6bd}
    .recommend .line{position:absolute;bottom:20px;left:18px;right:18px;height:2px;background:#536158}
    .recommend .line span{display:block;height:100%;background:#d39a68;width:78%}
    .topics{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .topic-card{background:var(--warm);border:1px solid var(--line);padding:28px;min-height:205px;display:flex;flex-direction:column;justify-content:space-between}
    .topic-card.featured{background:#d8c5ae;min-height:300px}
    .topic-card h3{font-size:25px;max-width:360px}
    .topic-card.featured h3{font-size:32px}
    .topic-side{display:grid;gap:16px}
    .signals{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px}
    .feature{background:#ede8df;border-top:3px solid var(--accent);padding:24px}
    .feature .icon{font-size:25px;color:var(--accent-dark)}
    .feature h3{font-size:18px;margin:12px 0 5px}
    .news-layout{display:grid;grid-template-columns:1fr 340px;gap:55px}
    .news-list{list-style:none;border-top:1px solid var(--line)}
    .news-list li{border-bottom:1px solid var(--line);padding:17px 0;display:flex;justify-content:space-between;gap:18px}
    .news-list a:hover{color:var(--accent-dark)}
    .news-list time{font-size:12px;color:#999;white-space:nowrap}
    .side-note{background:#dfe5de;padding:28px;border-left:4px solid var(--green)}
    .side-note h3{font-size:21px;margin-bottom:12px}
    .side-note p{font-size:13px;color:#556259}
    .faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px 34px}
    details{border-top:1px solid var(--line);padding:18px 0}
    summary{cursor:pointer;font-weight:800;list-style:none;display:flex;justify-content:space-between;gap:15px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";color:var(--accent);font-size:21px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:13px;padding:12px 30px 0 0}
    .cta{background:#c98e5d;color:#241a12;padding:55px 0}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .cta h2{max-width:600px}.cta p{margin-top:9px;max-width:620px;font-size:14px}
    .cta .btn{background:#252a27;color:#fff}
    .cta .btn:hover{background:#3e4941;transform:translateY(-2px)}
    footer{background:#1f2421;color:#dce1da;padding:42px 0 25px}
    .footer-main{display:flex;justify-content:space-between;gap:30px;padding-bottom:31px;border-bottom:1px solid rgba(255,255,255,.15)}
    footer .brand{color:#fff}.footer-copy{max-width:440px;color:#9ca79f;font-size:12px;margin-top:13px}
    .footer-links{display:flex;gap:22px;font-size:13px;color:#b9c2ba;align-items:start}
    .footer-links a:hover{color:#e0b18a}
    .copyright{display:flex;justify-content:space-between;color:#7d887f;font-size:11px;padding-top:20px;gap:20px}
    .back-top{position:fixed;right:22px;bottom:22px;width:42px;height:42px;border:1px solid var(--line);background:var(--warm);color:var(--accent-dark);border-radius:50%;opacity:0;pointer-events:none;transition:.2s;z-index:10}
    .back-top.show{opacity:1;pointer-events:auto}.back-top:hover{background:var(--accent);color:#fff}
    @media (max-width:1024px){
      .hero-inner{gap:35px}.recommend-grid{grid-template-columns:repeat(2,1fr)}
      .news-layout{gap:25px}.container{width:min(var(--max),calc(100% - 36px))}
    }
    @media (max-width:768px){
      .brand-row{height:68px}.utility .age-note{display:none}.utility{gap:11px}
      .channels{gap:24px}.hero-inner{grid-template-columns:1fr;min-height:0;padding:64px 0 70px}
      .hero{min-height:0}.hero-board{transform:none;max-width:570px}.hero-copy{font-size:15px}
      .section{padding:66px 0}.section-head{display:block}.section-intro{margin-top:12px}
      .topics,.news-layout{grid-template-columns:1fr}.topic-card.featured{min-height:240px}
      .faq-grid{grid-template-columns:1fr}.cta-inner,.footer-main{display:block}
      .footer-links{margin-top:24px}.copyright{display:block}.copyright span{display:block;margin-top:6px}
    }
    @media (max-width:520px){
      .container{width:calc(100% - 28px)}h1{font-size:43px}.hero-meta{gap:17px;flex-wrap:wrap}
      .hero-board{padding:17px}.board-item{min-height:100px;padding:13px 11px}.board-item strong{font-size:14px}
      h2{font-size:29px}.recommend-grid,.signals{grid-template-columns:1fr}
      .recommend{min-height:175px}.recommend h3{margin-top:25px}
      .news-list li{display:block}.news-list time{display:block;margin-top:6px}
      .brand{font-size:17px}.brand-mark{width:33px;height:33px}
    }

/* roulang page: category2 */
:root {
      --ink: #202523;
      --ink-soft: #55605b;
      --paper: #f7f7f3;
      --white: #ffffff;
      --line: #dfe3dc;
      --line-dark: #bdc7bd;
      --accent: #bd7047;
      --accent-dark: #8f4e32;
      --green: #31584c;
      --green-light: #e5eee7;
      --muted: #89918b;
      --radius: 7px;
      --shadow: 0 12px 28px rgba(30, 39, 34, .08);
      --container: 1180px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      font-size: 15px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    img { display: block; max-width: 100%; }
    :focus-visible { outline: 3px solid rgba(189,112,71,.35); outline-offset: 3px; }

    .container { width: min(var(--container), calc(100% - 48px)); margin: 0 auto; }
    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(247,247,243,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .brand-row {
      min-height: 78px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0;
      font-size: 17px;
      line-height: 1.2;
    }
    .brand small {
      display: block;
      margin-top: 5px;
      color: var(--muted);
      font-size: 11px;
      font-weight: 500;
    }
    .brand-mark {
      width: 40px;
      height: 40px;
      display: grid;
      place-items: center;
      border: 1px solid var(--accent);
      color: var(--accent-dark);
      font-size: 14px;
      font-weight: 900;
      letter-spacing: -1px;
    }
    .utility {
      display: flex;
      align-items: center;
      gap: 20px;
      color: var(--muted);
      font-size: 12px;
    }
    .utility a { color: var(--green); font-weight: 700; }
    .utility a:hover { color: var(--accent-dark); }
    .channel-bar { border-top: 1px solid rgba(223,227,220,.75); }
    .channels {
      display: flex;
      gap: 30px;
      min-height: 48px;
      align-items: center;
      overflow-x: auto;
      scrollbar-width: none;
    }
    .channels::-webkit-scrollbar { display: none; }
    .channel {
      position: relative;
      flex: 0 0 auto;
      color: var(--ink-soft);
      font-size: 13px;
      font-weight: 700;
      white-space: nowrap;
      padding: 11px 0 10px;
    }
    .channel::after {
      content: "";
      position: absolute;
      left: 0;
      right: 100%;
      bottom: -1px;
      height: 2px;
      background: var(--accent);
      transition: right .25s ease;
    }
    .channel:hover, .channel.active { color: var(--ink); }
    .channel:hover::after, .channel.active::after { right: 0; }

    main { overflow: hidden; }
    .intro {
      padding: 76px 0 54px;
      border-bottom: 1px solid var(--line);
    }
    .intro-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr);
      align-items: end;
      gap: 70px;
    }
    .eyebrow, .section-kicker {
      color: var(--accent-dark);
      font-size: 11px;
      font-weight: 900;
      letter-spacing: 1.5px;
      text-transform: uppercase;
    }
    h1, h2, h3 { letter-spacing: 0; line-height: 1.18; }
    h1 {
      max-width: 680px;
      margin-top: 17px;
      font-size: clamp(38px, 5vw, 66px);
      font-weight: 900;
    }
    .intro-copy {
      max-width: 650px;
      margin-top: 23px;
      color: var(--ink-soft);
      font-size: 17px;
    }
    .intro-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 45px;
      padding: 10px 19px;
      border: 1px solid transparent;
      border-radius: var(--radius);
      font-size: 13px;
      font-weight: 800;
      transition: transform .2s ease, background .2s ease, border-color .2s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn-primary { background: var(--green); color: var(--white); }
    .btn-primary:hover { background: #24483d; }
    .btn-light { border-color: var(--line-dark); color: var(--green); background: transparent; }
    .btn-light:hover { border-color: var(--green); background: var(--green-light); }

    .signal-board {
      border-top: 4px solid var(--green);
      background: var(--white);
      box-shadow: var(--shadow);
      padding: 24px;
    }
    .signal-top {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid var(--line);
      padding-bottom: 15px;
      margin-bottom: 19px;
      font-size: 12px;
      font-weight: 800;
    }
    .signal-top span:last-child { color: var(--accent-dark); }
    .signal-matrix {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 8px;
    }
    .signal-cell {
      min-height: 68px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 10px;
      border: 1px solid var(--line);
      background: #fbfcf9;
      transition: border-color .2s, background .2s;
    }
    .signal-cell:hover { border-color: var(--accent); background: #fffaf6; }
    .signal-cell strong { font-size: 18px; color: var(--green); }
    .signal-cell span { color: var(--muted); font-size: 11px; }
    .signal-note { margin-top: 18px; color: var(--ink-soft); font-size: 12px; }

    .section { padding: 74px 0; }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 26px;
    }
    .section-head h2 { margin-top: 8px; font-size: 31px; font-weight: 900; }
    .section-head p { max-width: 470px; color: var(--ink-soft); font-size: 13px; }
    .recommend-grid {
      display: grid;
      grid-template-columns: 1.35fr .85fr .85fr;
      gap: 14px;
    }
    .recommend-card {
      position: relative;
      min-height: 225px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 22px;
      border: 1px solid var(--line);
      background: var(--white);
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .recommend-card:first-child { min-height: 300px; background: var(--green); color: var(--white); }
    .recommend-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--shadow); }
    .card-index { color: var(--accent); font-size: 12px; font-weight: 900; }
    .recommend-card:first-child .card-index { color: #f0bf9d; }
    .recommend-card h3 { margin-top: 20px; font-size: 22px; }
    .recommend-card p { margin-top: 9px; color: var(--ink-soft); font-size: 13px; }
    .recommend-card:first-child p { color: #d6e1da; }
    .card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 26px; }
    .tag { display: inline-block; padding: 3px 8px; border: 1px solid var(--line-dark); color: var(--ink-soft); font-size: 11px; }
    .recommend-card:first-child .tag { border-color: #789487; color: #e2ede5; }
    .arrow { color: var(--accent); font-size: 19px; }

    .band { background: #ecefe9; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .compact-list {
      display: grid;
      grid-template-columns: repeat(4, minmax(190px, 1fr));
      gap: 11px;
    }
    .compact-item {
      min-height: 152px;
      padding: 18px;
      border-left: 3px solid var(--accent);
      background: var(--white);
    }
    .compact-item strong { display: block; font-size: 16px; }
    .compact-item p { margin-top: 11px; color: var(--ink-soft); font-size: 12px; line-height: 1.7; }

    .steps {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 0;
      border-top: 1px solid var(--line-dark);
      border-bottom: 1px solid var(--line-dark);
    }
    .step {
      min-height: 180px;
      padding: 24px;
      border-right: 1px solid var(--line-dark);
    }
    .step:last-child { border-right: 0; }
    .step-no { color: var(--accent-dark); font-size: 12px; font-weight: 900; }
    .step h3 { margin-top: 25px; font-size: 19px; }
    .step p { margin-top: 10px; color: var(--ink-soft); font-size: 13px; }

    .faq-layout {
      display: grid;
      grid-template-columns: .75fr 1.25fr;
      gap: 70px;
      align-items: start;
    }
    .faq-layout h2 { margin-top: 10px; font-size: 32px; }
    .faq-list { border-top: 1px solid var(--line-dark); }
    details { border-bottom: 1px solid var(--line); }
    summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 19px 0;
      cursor: pointer;
      list-style: none;
      font-weight: 800;
    }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--accent); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { padding: 0 38px 19px 0; color: var(--ink-soft); font-size: 13px; }

    .cta {
      padding: 52px 0;
      background: var(--accent);
      color: var(--white);
    }
    .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
    .cta h2 { font-size: 32px; }
    .cta p { max-width: 650px; margin-top: 8px; color: #fff0e8; font-size: 14px; }
    .cta .btn { background: var(--white); color: var(--accent-dark); }
    .cta .btn:hover { background: #fff6f1; }

    footer { padding: 42px 0 25px; background: #202523; color: #f4f5f0; }
    .footer-main { display: flex; justify-content: space-between; gap: 40px; }
    footer .brand { color: #fff; }
    footer .brand-mark { color: #efb28f; border-color: #efb28f; }
    .footer-copy { max-width: 430px; margin-top: 18px; color: #aeb9b0; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 24px; align-content: start; }
    .footer-links a { color: #d7ded8; font-size: 13px; }
    .footer-links a:hover { color: #efb28f; }
    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      margin-top: 35px;
      padding-top: 17px;
      border-top: 1px solid #3d4741;
      color: #89948b;
      font-size: 11px;
    }
    #toTop {
      position: fixed;
      right: 22px;
      bottom: 22px;
      width: 40px;
      height: 40px;
      border: 1px solid var(--line-dark);
      background: var(--white);
      color: var(--green);
      opacity: 0;
      pointer-events: none;
      transition: opacity .2s, transform .2s;
      z-index: 10;
    }
    #toTop.show { opacity: 1; pointer-events: auto; }
    #toTop:hover { transform: translateY(-3px); border-color: var(--accent); }

    @media (max-width: 1024px) {
      .intro-grid { gap: 35px; }
      .recommend-grid { grid-template-columns: 1fr 1fr; }
      .recommend-card:first-child { grid-column: 1 / -1; min-height: 255px; }
      .compact-list { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .brand-row { min-height: 68px; }
      .utility span { display: none; }
      .channels { gap: 23px; min-height: 45px; }
      .intro { padding: 54px 0 40px; }
      .intro-grid, .faq-layout { grid-template-columns: 1fr; gap: 36px; }
      h1 { font-size: 44px; }
      .intro-copy { font-size: 15px; }
      .section { padding: 54px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 13px; }
      .steps { grid-template-columns: 1fr; }
      .step { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line-dark); }
      .step:last-child { border-bottom: 0; }
      .cta-inner { align-items: flex-start; flex-direction: column; }
      .footer-main, .copyright { display: block; }
      .footer-links { margin-top: 27px; }
      .copyright span { display: block; margin-top: 8px; }
    }
    @media (max-width: 520px) {
      .container { width: calc(100% - 28px); }
      .brand { font-size: 15px; }
      .brand-mark { width: 35px; height: 35px; }
      h1 { font-size: 37px; }
      .signal-board { padding: 17px; }
      .signal-matrix { grid-template-columns: repeat(2, 1fr); }
      .recommend-grid, .compact-list { grid-template-columns: 1fr; }
      .recommend-card:first-child { grid-column: auto; min-height: 250px; }
      .recommend-card { min-height: 200px; }
      .cta h2 { font-size: 27px; }
    }
    @media (max-width: 360px) {
      h1 { font-size: 34px; }
      .intro-actions .btn { width: 100%; }
      .utility a { font-size: 11px; }
    }

/* roulang page: category1 */
:root {
      --ink: #1d211e;
      --ink-soft: #313832;
      --paper: #f6f3ed;
      --paper-deep: #ebe6dc;
      --white: #fffdf8;
      --line: #d9d4ca;
      --muted: #70766f;
      --copper: #ad6848;
      --copper-dark: #884b35;
      --olive: #66705b;
      --shadow: 0 18px 45px rgba(29, 33, 30, .1);
      --radius: 7px;
      --container: 1180px;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    img { max-width: 100%; display: block; }
    .container { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; }

    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(246,243,237,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .brand-row {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: 0;
      line-height: 1.15;
    }
    .brand small {
      display: block;
      margin-top: 4px;
      color: var(--muted);
      font-size: 10px;
      font-weight: 500;
      letter-spacing: 0;
    }
    .brand-mark {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      color: var(--white);
      background: var(--ink);
      border-radius: 50%;
      font-size: 14px;
      letter-spacing: -1px;
    }
    .utility {
      display: flex;
      align-items: center;
      gap: 22px;
      color: var(--muted);
      font-size: 13px;
    }
    .utility a {
      color: var(--ink);
      border-bottom: 1px solid var(--ink);
    }
    .channel-bar {
      border-top: 1px solid rgba(217,212,202,.75);
      overflow: hidden;
    }
    .channels {
      display: flex;
      align-items: center;
      gap: 30px;
      min-height: 48px;
      overflow-x: auto;
      scrollbar-width: none;
    }
    .channels::-webkit-scrollbar { display: none; }
    .channel {
      position: relative;
      flex: 0 0 auto;
      height: 48px;
      display: inline-flex;
      align-items: center;
      color: var(--muted);
      font-size: 14px;
      white-space: nowrap;
      transition: color .2s ease;
    }
    .channel::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 2px;
      background: transparent;
      transform: scaleX(0);
      transition: transform .2s ease, background .2s ease;
    }
    .channel:hover, .channel.active { color: var(--ink); }
    .channel.active { font-weight: 700; }
    .channel.active::after { background: var(--copper); transform: scaleX(1); }

    main { overflow: hidden; }
    .crumbs {
      padding-top: 30px;
      color: var(--muted);
      font-size: 13px;
    }
    .crumbs a:hover { color: var(--copper-dark); }

    .hero {
      padding: 30px 0 78px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 430px;
      gap: clamp(42px, 7vw, 100px);
      align-items: center;
    }
    .eyebrow, .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      color: var(--copper-dark);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 1.5px;
    }
    .eyebrow::before, .section-kicker::before {
      content: "";
      width: 24px;
      height: 1px;
      background: var(--copper);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 720px;
      margin: 18px 0 20px;
      font-size: clamp(42px, 5.3vw, 76px);
      line-height: 1.08;
      letter-spacing: 0;
      font-weight: 900;
    }
    .hero-copy {
      max-width: 650px;
      color: var(--muted);
      font-size: 17px;
      line-height: 1.95;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 30px;
    }
    .btn {
      min-height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 0 20px;
      border: 1px solid transparent;
      border-radius: var(--radius);
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, border-color .2s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:focus-visible, a:focus-visible, summary:focus-visible {
      outline: 3px solid rgba(173,104,72,.35);
      outline-offset: 3px;
    }
    .btn-primary { color: var(--white); background: var(--ink); }
    .btn-primary:hover { background: var(--copper-dark); }
    .btn-light { color: var(--ink); border-color: var(--line); background: transparent; }
    .btn-light:hover { border-color: var(--ink); background: var(--white); }

    .coupon-wall {
      position: relative;
      min-height: 370px;
      padding: 24px;
      background: var(--ink);
      box-shadow: var(--shadow);
      color: var(--white);
      transform: rotate(1.2deg);
    }
    .coupon-wall::before {
      content: "";
      position: absolute;
      inset: 12px;
      border: 1px solid rgba(255,253,248,.24);
      pointer-events: none;
    }
    .coupon-top, .coupon-bottom {
      position: relative;
      z-index: 1;
      display: flex;
      justify-content: space-between;
      color: #c6c9bf;
      font-size: 11px;
      letter-spacing: 1px;
    }
    .coupon-main {
      position: relative;
      z-index: 1;
      display: grid;
      place-items: center;
      min-height: 245px;
      text-align: center;
    }
    .coupon-main strong {
      display: block;
      color: #e6a078;
      font-size: 68px;
      line-height: 1;
      letter-spacing: -3px;
    }
    .coupon-main span {
      display: block;
      margin-top: 12px;
      font-size: 18px;
      font-weight: 700;
    }
    .coupon-main p {
      max-width: 250px;
      margin: 13px auto 0;
      color: #c6c9bf;
      font-size: 13px;
      line-height: 1.7;
    }
    .coupon-bottom { padding-top: 17px; border-top: 1px dashed rgba(255,253,248,.3); }

    .section { padding: 80px 0; }
    .section-paper { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .section-head {
      display: flex;
      justify-content: space-between;
      gap: 25px;
      align-items: end;
      margin-bottom: 32px;
    }
    h2 {
      margin: 9px 0 0;
      font-size: clamp(28px, 3.2vw, 43px);
      line-height: 1.2;
      font-weight: 900;
    }
    .section-note { max-width: 390px; margin: 0; color: var(--muted); font-size: 14px; }

    .filter-row {
      display: flex;
      gap: 9px;
      overflow-x: auto;
      padding-bottom: 4px;
      margin-bottom: 27px;
      scrollbar-width: none;
    }
    .filter-row::-webkit-scrollbar { display: none; }
    .filter {
      flex: 0 0 auto;
      padding: 8px 14px;
      color: var(--muted);
      border: 1px solid var(--line);
      border-radius: 4px;
      background: transparent;
      font-size: 13px;
      transition: .2s ease;
    }
    .filter:hover, .filter.active { color: var(--white); background: var(--ink); border-color: var(--ink); }
    .topic-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }
    .topic-card {
      min-height: 190px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 21px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--paper);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .topic-card:hover {
      transform: translateY(-5px);
      border-color: var(--copper);
      box-shadow: 0 12px 28px rgba(29,33,30,.08);
    }
    .topic-index { color: var(--copper); font-size: 12px; font-weight: 800; }
    .topic-card h3 { margin: 22px 0 6px; font-size: 20px; line-height: 1.3; }
    .topic-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
    .topic-arrow { align-self: end; color: var(--copper-dark); font-size: 20px; }

    .split-section {
      display: grid;
      grid-template-columns: .8fr 1.2fr;
      gap: 70px;
      align-items: start;
    }
    .feature-intro p { max-width: 390px; margin-top: 21px; color: var(--muted); }
    .recommend-list { border-top: 1px solid var(--ink); }
    .recommend-item {
      display: grid;
      grid-template-columns: 56px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 20px 0;
      border-bottom: 1px solid var(--line);
    }
    .recommend-no { color: var(--copper); font-size: 24px; font-weight: 900; }
    .recommend-item h3 { margin: 0 0 3px; font-size: 18px; }
    .recommend-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .recommend-tag { color: var(--olive); font-size: 12px; white-space: nowrap; }

    .browse-band { background: var(--ink); color: var(--white); }
    .browse-band .section-kicker { color: #e6a078; }
    .browse-band .section-kicker::before { background: #e6a078; }
    .browse-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1px;
      margin-top: 34px;
      background: rgba(255,255,255,.2);
      border: 1px solid rgba(255,255,255,.2);
    }
    .browse-cell { min-height: 170px; padding: 24px; background: var(--ink); }
    .browse-cell strong { display: block; margin-bottom: 10px; color: #e6a078; font-size: 30px; }
    .browse-cell h3 { margin-bottom: 7px; font-size: 18px; }
    .browse-cell p { margin: 0; color: #bfc5bc; font-size: 13px; }

    .faq-wrap {
      display: grid;
      grid-template-columns: .7fr 1.3fr;
      gap: 80px;
    }
    .faq-intro p { margin-top: 20px; color: var(--muted); }
    .faq-list { border-top: 1px solid var(--ink); }
    details { border-bottom: 1px solid var(--line); }
    summary {
      position: relative;
      padding: 21px 35px 21px 0;
      list-style: none;
      cursor: pointer;
      font-weight: 700;
    }
    summary::-webkit-details-marker { display: none; }
    summary::after {
      content: "+";
      position: absolute;
      right: 3px;
      top: 18px;
      color: var(--copper);
      font-size: 23px;
      font-weight: 400;
    }
    details[open] summary::after { content: "−"; }
    details p { max-width: 700px; margin: -5px 0 20px; color: var(--muted); font-size: 14px; }

    .cta {
      padding: 64px 0;
      background: var(--paper-deep);
      border-top: 1px solid var(--line);
    }
    .cta-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }
    .cta h2 { max-width: 600px; }
    .cta p { margin: 14px 0 0; color: var(--muted); }

    footer { padding: 40px 0 26px; background: var(--ink); color: var(--white); }
    .footer-main {
      display: flex;
      justify-content: space-between;
      gap: 45px;
      padding-bottom: 32px;
    }
    .footer-main .brand { color: var(--white); }
    .footer-main .brand-mark { color: var(--ink); background: var(--white); }
    .footer-copy { max-width: 460px; margin: 17px 0 0; color: #aeb5aa; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 23px; align-items: flex-start; }
    .footer-links a { color: #d8ddd4; font-size: 13px; transition: color .2s ease; }
    .footer-links a:hover { color: #e6a078; }
    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding-top: 19px;
      border-top: 1px solid rgba(255,255,255,.15);
      color: #879087;
      font-size: 11px;
    }
    .to-top {
      position: fixed;
      right: 22px;
      bottom: 22px;
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      color: var(--white);
      background: var(--copper-dark);
      border: 0;
      border-radius: 50%;
      box-shadow: 0 7px 18px rgba(29,33,30,.2);
      opacity: 0;
      visibility: hidden;
      transition: opacity .2s ease, visibility .2s ease, transform .2s ease;
    }
    .to-top.visible { opacity: 1; visibility: visible; }
    .to-top:hover { transform: translateY(-3px); background: var(--ink); }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr 370px; gap: 40px; }
      .topic-grid { grid-template-columns: repeat(2, 1fr); }
      .split-section, .faq-wrap { gap: 42px; }
    }
    @media (max-width: 768px) {
      .container { width: min(calc(100% - 32px), var(--container)); }
      .brand-row { min-height: 68px; }
      .utility span { display: none; }
      .hero { padding: 25px 0 58px; }
      .hero-grid, .split-section, .faq-wrap { grid-template-columns: 1fr; }
      .hero-grid { gap: 42px; }
      h1 { font-size: clamp(40px, 11vw, 60px); }
      .coupon-wall { max-width: 470px; min-height: 330px; }
      .section { padding: 58px 0; }
      .section-head, .cta-inner { display: block; }
      .section-note { margin-top: 15px; }
      .browse-grid { grid-template-columns: 1fr; }
      .browse-cell { min-height: auto; }
      .cta .btn { margin-top: 25px; }
      .footer-main, .copyright { display: block; }
      .footer-links { margin-top: 25px; }
      .copyright span { display: block; margin-top: 8px; }
    }
    @media (max-width: 520px) {
      .hero-actions .btn { width: 100%; }
      .topic-grid { grid-template-columns: 1fr; }
      .topic-card { min-height: 160px; }
      .recommend-item { grid-template-columns: 38px 1fr; gap: 12px; }
      .recommend-tag { grid-column: 2; }
      .coupon-main strong { font-size: 58px; }
      .coupon-wall { min-height: 305px; padding: 20px; }
    }
    @media (max-width: 360px) {
      body { font-size: 15px; }
      .brand { font-size: 14px; }
      .brand-mark { width: 34px; height: 34px; }
      .utility { display: none; }
    }