/* roulang page: index */
:root{
  --ink:#17352e;
  --ink-deep:#102821;
  --muted:#6d7772;
  --paper:#fbf8f1;
  --sand:#f2ede2;
  --cream:#fffdf8;
  --line:#e7dfd1;
  --orange:#d58c38;
  --orange-deep:#b96d20;
  --mint:#dceee4;
  --teal:#2d7665;
  --danger:#a86642;
  --radius:18px;
  --shadow:0 16px 40px rgba(37,50,42,.08);
  --container:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:15px}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer;border:0}
img{max-width:100%;display:block}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
.site-header{height:78px;background:rgba(251,248,241,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
.header-inner{height:100%;display:flex;align-items:center;gap:34px}
.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
.brand-mark{width:31px;height:31px;border-radius:10px;background:var(--ink);color:#f5c879;display:grid;place-items:center;font-size:19px}
.main-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
.main-nav a{color:#5e6c65;font-size:14px;position:relative;padding:27px 0;transition:.2s}
.main-nav a:hover,.main-nav a.active{color:var(--ink);font-weight:700}
.main-nav a.active:after{content:"";position:absolute;bottom:14px;left:0;right:0;height:3px;border-radius:3px;background:var(--orange)}
.header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-weight:700;transition:.22s ease}
.header-cta,.btn-primary{background:var(--ink);color:#fff}
.header-cta:hover,.btn-primary:hover{background:var(--ink-deep);transform:translateY(-2px);box-shadow:0 8px 18px rgba(23,53,46,.18)}
.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}
.btn-secondary:hover{border-color:var(--orange);color:var(--orange-deep);transform:translateY(-2px)}
.btn:focus,.header-cta:focus,a:focus-visible,button:focus-visible{outline:3px solid rgba(213,140,56,.35);outline-offset:3px}
.menu-toggle{display:none;background:none;color:var(--ink);font-size:24px}
.hero{padding:88px 0 74px;background:linear-gradient(120deg,#fbf8f1 0%,#f4eddf 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:72px;align-items:center}
.eyebrow,.section-kicker{color:var(--orange-deep);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}
.hero h1{font-size:clamp(38px,5vw,66px);line-height:1.16;letter-spacing:-.055em;margin:16px 0 22px;max-width:680px}
.hero h1 em{font-style:normal;color:var(--teal)}
.hero-copy{font-size:18px;color:var(--muted);max-width:590px;line-height:1.9}
.hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero-note{display:flex;align-items:center;gap:9px;margin-top:21px;color:var(--muted);font-size:13px}
.status-dot{width:8px;height:8px;border-radius:50%;background:#4aa47f;box-shadow:0 0 0 5px #d9eee4}
.entry-panel{background:var(--cream);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow);position:relative}
.panel-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:28px}
.panel-label{font-weight:800;font-size:17px}
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:30px;padding:5px 10px;font-size:12px;font-weight:700}
.badge-mint{background:var(--mint);color:var(--teal)}
.entry-address{padding:18px;background:#f4f0e8;border:1px dashed #cfc5b5;border-radius:13px;color:var(--ink);font-weight:700;word-break:break-all}
.entry-address small{display:block;color:var(--muted);font-weight:500;margin-bottom:4px}
.panel-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:20px}
.panel-step{padding:13px 10px;background:#fff;border:1px solid var(--line);border-radius:12px;text-align:center;font-size:12px;color:var(--muted)}
.panel-step strong{display:block;color:var(--ink);font-size:14px;margin-bottom:3px}
.section{padding:82px 0}
.section.alt{background:var(--sand)}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:31px}
.section h2{font-size:clamp(27px,3vw,40px);line-height:1.25;letter-spacing:-.035em;margin-top:8px}
.section-intro{max-width:520px;color:var(--muted);line-height:1.85}
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.flow-card{padding:25px 22px;border:1px solid var(--line);background:var(--cream);border-radius:var(--radius);transition:.2s}
.flow-card:hover,.device-card:hover,.guide-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d4c5ad}
.flow-no{color:var(--orange);font-size:25px;font-weight:800;font-family:Georgia,serif}
.flow-card h3{font-size:17px;margin:13px 0 7px}
.flow-card p,.device-card p,.guide-card p{color:var(--muted);font-size:13px;line-height:1.75}
.device-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:20px}
.device-tabs{display:flex;flex-direction:column;gap:10px}
.device-tab{padding:19px 20px;text-align:left;background:var(--cream);border:1px solid var(--line);border-radius:14px;color:var(--muted);transition:.2s}
.device-tab:hover,.device-tab.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.device-tab strong{display:block;font-size:17px;margin-bottom:3px}
.device-detail{background:var(--ink);border-radius:22px;padding:35px;color:#fff;min-height:250px;position:relative;overflow:hidden}
.device-detail:after{content:"";position:absolute;width:190px;height:190px;border:1px solid rgba(255,255,255,.15);border-radius:50%;right:-46px;bottom:-76px}
.device-detail h3{font-size:28px;margin:17px 0 10px}
.device-detail p{color:#cbd8d0;max-width:470px}
.device-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}
.device-meta span{padding:7px 11px;border:1px solid rgba(255,255,255,.2);border-radius:8px;font-size:12px;color:#dbe8df}
.download-box{display:grid;grid-template-columns:180px 1fr;gap:34px;align-items:center;background:var(--cream);border:1px solid var(--line);border-radius:22px;padding:34px}
.qr{height:160px;width:160px;border:10px solid #fff;outline:1px solid var(--line);background:repeating-linear-gradient(45deg,#193b32 0 5px,#fff 5px 10px);display:grid;place-items:center;color:#fff;font-size:12px;text-align:center}
.download-box h3{font-size:25px;margin:8px 0}
.download-box p{color:var(--muted);max-width:620px}
.download-meta{display:flex;gap:20px;flex-wrap:wrap;margin:18px 0;color:var(--muted);font-size:13px}
.download-actions{display:flex;gap:10px;flex-wrap:wrap}
.check-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.check-item{background:var(--cream);border:1px solid var(--line);padding:21px;border-radius:14px;display:flex;gap:14px}
.check-icon{flex:0 0 34px;height:34px;border-radius:10px;background:var(--mint);color:var(--teal);display:grid;place-items:center;font-weight:800}
.check-item h3{font-size:16px;margin-bottom:4px}.check-item p{color:var(--muted);font-size:13px}
.timeline{border-left:2px solid #d8cbb8;margin-left:12px;padding-left:31px;display:grid;gap:26px}
.timeline-item{position:relative}.timeline-item:before{content:"";position:absolute;left:-40px;top:7px;width:14px;height:14px;border:3px solid var(--paper);background:var(--orange);border-radius:50%;box-shadow:0 0 0 1px var(--orange)}
.timeline-item h3{font-size:17px}.timeline-item p{color:var(--muted);font-size:14px}
.scene-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}
.scene-feature{background:#e4eee7;border-radius:22px;padding:31px;min-height:245px}
.scene-feature h3{font-size:27px;margin:14px 0 8px}.scene-feature p{color:var(--muted);max-width:510px}
.scene-list{display:grid;gap:12px}.scene-list div{padding:19px;background:var(--cream);border:1px solid var(--line);border-radius:13px}.scene-list strong{display:block}.scene-list span{font-size:13px;color:var(--muted)}
.status-bar{display:flex;align-items:center;gap:16px;padding:19px 22px;border:1px solid #cfe1d7;background:#f0f8f2;border-radius:14px}.status-bar strong{color:var(--teal)}.status-bar p{color:var(--muted);font-size:13px}
.news-list{border-top:1px solid var(--line)}.news-item{display:grid;grid-template-columns:110px 1fr 110px;gap:22px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:.2s}.news-item:hover{padding-left:10px;background:rgba(255,255,255,.35)}.news-type{font-size:12px;color:var(--orange-deep);font-weight:800}.news-item h3{font-size:17px;margin-bottom:4px}.news-item p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.news-date{text-align:right;color:var(--muted);font-size:12px}.empty-state{padding:38px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:14px;margin-top:18px}
.version-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.version-card{padding:22px;background:var(--cream);border-top:3px solid var(--orange);border-radius:14px;border-left:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.version-card strong{font-size:20px}.version-card time{display:block;color:var(--muted);font-size:12px;margin:5px 0 10px}.version-card p{font-size:13px;color:var(--muted)}
.problem-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.problem{padding:20px 22px;background:var(--cream);border:1px solid var(--line);border-radius:14px;display:flex;justify-content:space-between;gap:15px;align-items:center}.problem span{color:var(--muted);font-size:13px}.problem a{color:var(--orange-deep);font-weight:700;font-size:13px;white-space:nowrap}
.copy-box{display:flex;align-items:center;gap:12px;background:var(--ink);color:#fff;padding:22px;border-radius:16px}.copy-box code{flex:1;color:#e9c37c;word-break:break-all;font-family:inherit}.copy-box button{background:var(--orange);color:#fff;padding:9px 15px;border-radius:8px;font-weight:700}.copy-box button:hover{background:var(--orange-deep)}
.matrix{width:100%;border-collapse:collapse;background:var(--cream);border:1px solid var(--line);border-radius:16px;overflow:hidden;display:table}.matrix th,.matrix td{padding:16px;text-align:left;border-bottom:1px solid var(--line);font-size:13px}.matrix th{background:#eee8dc;color:var(--ink)}.matrix tr:last-child td{border-bottom:0}.matrix td:not(:first-child){color:var(--teal);font-weight:700}
.faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq details{background:var(--cream);border:1px solid var(--line);border-radius:13px;padding:17px 20px}.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between}.faq summary:after{content:"＋";color:var(--orange-deep)}.faq details[open] summary:after{content:"－"}.faq p{color:var(--muted);font-size:13px;padding-top:12px}
.final-cta{background:var(--ink);color:#fff;padding:54px;border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}.final-cta h2{font-size:31px;line-height:1.3}.final-cta p{color:#c9d8d0;margin-top:8px}.final-cta .btn-primary{background:var(--orange)}.final-cta .btn-primary:hover{background:var(--orange-deep)}.site-footer{background:#112b25;color:#dce8e0;padding:52px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer-brand{font-size:20px;font-weight:800}.footer-desc{color:#9fb3a9;font-size:13px;margin-top:13px;max-width:280px}.site-footer h3{font-size:14px;margin-bottom:13px;color:#fff}.site-footer li{list-style:none;margin:8px 0;color:#a9bbb2;font-size:13px}.site-footer a:hover{color:#f0c579}.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:18px;color:#8da39a;font-size:12px;display:flex;justify-content:space-between;gap:20px}
@media(max-width:1024px){.main-nav{gap:14px}.hero-grid{gap:35px}.flow{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.container{width:min(100% - 32px,var(--container))}.site-header{height:68px}.header-inner{gap:12px}.brand{font-size:16px}.brand-mark{width:28px;height:28px}.main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:10px 20px;flex-direction:column;align-items:stretch;gap:0;box-shadow:var(--shadow)}.main-nav.open{display:flex}.main-nav a{padding:12px 0}.main-nav a.active:after{bottom:7px;right:auto;width:35px}.header-cta{margin-left:auto;padding:8px 12px;font-size:13px}.menu-toggle{display:block}.hero{padding:58px 0}.hero-grid{grid-template-columns:1fr}.hero h1{font-size:42px}.hero-copy{font-size:16px}.section{padding:62px 0}.section-head{display:block}.section-intro{margin-top:12px}.device-layout,.scene-grid{grid-template-columns:1fr}.device-tabs{display:grid;grid-template-columns:repeat(3,1fr)}.device-tab{padding:13px 10px}.device-tab strong{font-size:14px}.download-box{grid-template-columns:1fr;text-align:center}.qr{margin:auto}.download-actions{justify-content:center}.check-grid,.faq,.problem-grid{grid-template-columns:1fr}.version-grid{grid-template-columns:1fr}.news-item{grid-template-columns:85px 1fr}.news-date{display:none}.final-cta{display:block;padding:35px 26px}.final-cta .hero-actions{margin-top:22px}.footer-grid{gap:25px}}
@media(max-width:520px){.hero h1{font-size:35px}.panel-steps{grid-template-columns:1fr}.flow{grid-template-columns:1fr}.device-tabs{grid-template-columns:1fr}.device-detail{padding:26px}.device-detail h3{font-size:24px}.download-box{padding:25px 18px}.copy-box{display:block}.copy-box code{display:block;margin-bottom:14px}.copy-box button{width:100%}.matrix{font-size:12px}.matrix th,.matrix td{padding:11px 8px}.copyright{display:block}.copyright span{display:block;margin-top:8px}}

/* roulang page: article */
:root{
      --ink:#17352e;
      --ink-deep:#102821;
      --muted:#6d7772;
      --paper:#fbf8f1;
      --sand:#f2ede2;
      --cream:#fffdf8;
      --line:#e7dfd1;
      --orange:#d58c38;
      --orange-deep:#b96d20;
      --mint:#dceee4;
      --teal:#2d7665;
      --danger:#a86642;
      --radius:18px;
      --shadow:0 16px 40px rgba(37,50,42,.08);
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
      line-height:1.75;
      font-size:15px;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{
      height:78px;
      position:sticky;
      top:0;
      z-index:20;
      background:rgba(251,248,241,.95);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
    .brand-mark{
      width:31px;height:31px;border-radius:10px;background:var(--ink);color:#f5c879;
      display:grid;place-items:center;font-size:19px;
    }
    .main-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
    .main-nav a{
      color:#5e6c65;font-size:14px;padding:27px 0;position:relative;transition:.2s;
    }
    .main-nav a:hover,.main-nav a.active{color:var(--ink);font-weight:700}
    .main-nav a.active:after{
      content:"";position:absolute;bottom:14px;left:0;right:0;height:3px;
      border-radius:3px;background:var(--orange);
    }
    .header-cta,.btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:10px;padding:11px 18px;font-weight:700;transition:.22s ease;
    }
    .header-cta,.btn-primary{background:var(--ink);color:#fff}
    .header-cta:hover,.btn-primary:hover{
      background:var(--ink-deep);color:#fff;transform:translateY(-2px);
      box-shadow:0 8px 18px rgba(23,53,46,.18);
    }
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}
    .btn-secondary:hover{border-color:var(--orange);color:var(--orange-deep);transform:translateY(-2px)}
    .btn:focus,.header-cta:focus,a:focus-visible,button:focus-visible{
      outline:3px solid rgba(213,140,56,.35);outline-offset:3px;
    }
    .menu-toggle{display:none;background:none;color:var(--ink);font-size:24px}
    .article-hero{
      padding:68px 0 58px;
      background:linear-gradient(120deg,#fbf8f1 0%,#f4eddf 100%);
      border-bottom:1px solid var(--line);
    }
    .breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);font-size:13px;margin-bottom:25px}
    .breadcrumbs a{color:var(--teal)}
    .breadcrumbs .slash{color:#b7afa2}
    .article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:62px;align-items:start}
    .article-label{
      display:inline-flex;align-items:center;gap:8px;color:var(--orange-deep);
      font-size:12px;font-weight:800;letter-spacing:.13em;
    }
    .article-label:before{content:"";width:25px;height:2px;background:var(--orange)}
    .article-hero h1{
      max-width:820px;font-size:clamp(34px,5vw,58px);line-height:1.2;
      letter-spacing:-.05em;margin:15px 0 20px;
    }
    .article-summary{max-width:760px;color:var(--muted);font-size:17px;line-height:1.9;margin:0}
    .article-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:25px;color:var(--muted);font-size:13px}
    .meta-item{display:inline-flex;align-items:center;gap:7px}
    .meta-dot{width:7px;height:7px;background:var(--orange);border-radius:50%}
    .article-side{
      background:var(--ink);color:#fff;border-radius:20px;padding:25px;
      box-shadow:var(--shadow);position:relative;overflow:hidden;
    }
    .article-side:after{
      content:"";position:absolute;width:125px;height:125px;border:1px solid rgba(255,255,255,.14);
      border-radius:50%;right:-46px;bottom:-45px;
    }
    .side-kicker{color:#d9ba7d;font-size:12px;font-weight:800;letter-spacing:.1em}
    .article-side h2{font-size:22px;line-height:1.4;margin:12px 0 10px}
    .article-side p{color:#c6d2ca;font-size:13px;line-height:1.8;margin-bottom:20px}
    .side-link{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-top:1px solid rgba(255,255,255,.15);font-size:13px}
    .side-link span{color:#f5c879}
    .article-main{padding:70px 0}
    .reading-column{max-width:820px;margin:0 auto}
    .content-card{
      background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);
      padding:clamp(25px,5vw,52px);box-shadow:0 8px 25px rgba(37,50,42,.035);
    }
    .content-card:empty{display:none}
    .content-card h2{font-size:28px;line-height:1.4;margin:34px 0 14px}
    .content-card h3{font-size:20px;line-height:1.5;margin:27px 0 10px}
    .content-card h2:first-child,.content-card h3:first-child{margin-top:0}
    .content-card p{color:#405049;line-height:2;margin:0 0 17px}
    .content-card ul,.content-card ol{color:#405049;padding-left:1.5em;line-height:2;margin:14px 0 22px}
    .content-card li{padding-left:5px;margin:5px 0}
    .content-card blockquote{
      margin:25px 0;padding:18px 22px;border-left:4px solid var(--orange);
      background:#f6efe2;color:var(--ink);border-radius:0 12px 12px 0;
    }
    .content-card img{border-radius:13px;margin:24px auto}
    .content-card table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14px}
    .content-card th,.content-card td{border:1px solid var(--line);padding:11px;text-align:left}
    .content-card th{background:var(--sand);color:var(--ink)}
    .missing{
      padding:45px 20px;text-align:center;background:var(--sand);
      border:1px dashed #d6c9b6;border-radius:15px;color:var(--muted);
    }
    .missing strong{display:block;color:var(--ink);font-size:22px;margin-bottom:8px}
    .reading-tools{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:18px 0;border-bottom:1px solid var(--line);margin-bottom:25px;
    }
    .reading-tools .badge{background:var(--mint);color:var(--teal);padding:6px 12px}
    .reading-tools small{color:var(--muted)}
    .guide-strip{
      margin-top:34px;padding:24px 26px;border-radius:15px;background:#e4eee7;
      display:flex;justify-content:space-between;align-items:center;gap:20px;
    }
    .guide-strip h2{font-size:20px;margin:0 0 5px}
    .guide-strip p{color:var(--muted);font-size:13px;margin:0}
    .article-bottom{padding:0 0 76px}
    .bottom-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .info-panel{border:1px solid var(--line);background:var(--cream);border-radius:15px;padding:23px}
    .info-panel h2{font-size:18px;margin:0 0 13px}
    .info-panel p{color:var(--muted);font-size:13px;margin:0;line-height:1.8}
    .action-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
    .site-footer{background:var(--ink-deep);color:#e8efe9;padding:54px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{font-size:20px;font-weight:800;margin-bottom:12px}
    .footer-desc{color:#aebdb3;font-size:13px;max-width:270px;line-height:1.8}
    .site-footer h3{font-size:14px;color:#f2c477;margin:3px 0 14px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:8px 0}
    .site-footer li a{color:#b9c7be;font-size:13px;transition:.2s}
    .site-footer li a:hover{color:#fff}
    .copyright{
      display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
      border-top:1px solid rgba(255,255,255,.13);margin-top:40px;padding-top:18px;
      color:#93a69b;font-size:12px;
    }
    @media (max-width:1024px){
      .article-layout{gap:32px}
      .main-nav{gap:17px}
      .header-inner{gap:20px}
      .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:2}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 34px))}
      .site-header{height:68px}
      .header-inner{gap:12px}
      .brand{font-size:16px}
      .brand-mark{width:29px;height:29px}
      .main-nav{
        display:none;position:absolute;top:68px;left:0;right:0;margin:0;padding:12px 17px;
        background:var(--cream);border-bottom:1px solid var(--line);box-shadow:var(--shadow);
        flex-direction:column;align-items:stretch;gap:0;
      }
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 4px;border-bottom:1px solid #f0e9dc}
      .main-nav a.active:after{bottom:0;left:auto;width:35px}
      .header-cta{margin-left:auto;padding:9px 12px;font-size:13px}
      .menu-toggle{display:block}
      .article-hero{padding:45px 0 42px}
      .article-layout{display:block}
      .article-side{margin-top:30px}
      .article-main{padding:42px 0}
      .bottom-grid{grid-template-columns:1fr}
      .guide-strip{display:block}
      .guide-strip .btn{margin-top:16px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:27px}
      .footer-grid>div:last-child{grid-column:auto}
    }
    @media (max-width:520px){
      .article-hero h1{font-size:34px}
      .article-summary{font-size:15px}
      .article-meta{gap:10px;display:grid}
      .content-card{padding:23px 18px}
      .content-card h2{font-size:24px}
      .reading-tools{display:block}
      .reading-tools small{display:block;margin-top:8px}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:7px}
    }

/* roulang page: category1 */
:root{
      --ink:#17352e;
      --ink-deep:#102821;
      --muted:#6d7772;
      --paper:#fbf8f1;
      --sand:#f2ede2;
      --cream:#fffdf8;
      --line:#e7dfd1;
      --orange:#d58c38;
      --orange-deep:#b96d20;
      --mint:#dceee4;
      --teal:#2d7665;
      --danger:#a86642;
      --radius:18px;
      --shadow:0 16px 40px rgba(37,50,42,.08);
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
      font-size:15px;
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{
      height:78px;
      position:sticky;
      top:0;
      z-index:20;
      background:rgba(251,248,241,.95);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
    .brand-mark{
      width:31px;height:31px;border-radius:10px;background:var(--ink);color:#f5c879;
      display:grid;place-items:center;font-size:19px;
    }
    .main-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
    .main-nav a{
      position:relative;padding:27px 0;color:#5e6c65;font-size:14px;transition:.2s;
    }
    .main-nav a:hover,.main-nav a.active{color:var(--ink);font-weight:700}
    .main-nav a.active:after{
      content:"";position:absolute;left:0;right:0;bottom:14px;height:3px;
      border-radius:3px;background:var(--orange);
    }
    .header-cta,.btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:10px;padding:11px 18px;font-weight:700;transition:.22s ease;
    }
    .header-cta,.btn-primary{background:var(--ink);color:#fff}
    .header-cta:hover,.btn-primary:hover{
      background:var(--ink-deep);color:#fff;transform:translateY(-2px);
      box-shadow:0 8px 18px rgba(23,53,46,.18);
    }
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}
    .btn-secondary:hover{border-color:var(--orange);color:var(--orange-deep);transform:translateY(-2px)}
    .btn:focus,.header-cta:focus,a:focus-visible,button:focus-visible{
      outline:3px solid rgba(213,140,56,.35);outline-offset:3px;
    }
    .menu-toggle{display:none;background:none;color:var(--ink);font-size:24px}
    .page-intro{
      padding:70px 0 62px;
      background:linear-gradient(120deg,#fbf8f1 0%,#f4eddf 100%);
      border-bottom:1px solid var(--line);
    }
    .crumbs{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;margin-bottom:28px}
    .crumbs a:hover{color:var(--orange-deep)}
    .crumbs span{color:#b7afa1}
    .intro-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:end}
    .eyebrow,.section-kicker{
      color:var(--orange-deep);font-size:12px;font-weight:800;
      letter-spacing:.14em;text-transform:uppercase;
    }
    h1,h2,h3,p{margin-top:0}
    h1{
      max-width:760px;margin:13px 0 18px;font-size:clamp(36px,5vw,60px);
      line-height:1.17;letter-spacing:-.055em;
    }
    h1 em{font-style:normal;color:var(--teal)}
    .intro-copy{max-width:650px;color:var(--muted);font-size:17px;line-height:1.9;margin-bottom:0}
    .intro-aside{
      padding:25px;background:var(--ink);color:#fff;border-radius:22px;
      box-shadow:var(--shadow);position:relative;overflow:hidden;
    }
    .intro-aside:after{
      content:"";position:absolute;width:150px;height:150px;border:1px solid rgba(245,200,121,.3);
      border-radius:50%;right:-55px;top:-55px;
    }
    .aside-label{color:#f5c879;font-size:12px;font-weight:700;letter-spacing:.1em}
    .aside-title{font-size:24px;font-weight:800;margin:12px 0 8px}
    .aside-text{color:#cbd9d1;font-size:13px;margin-bottom:20px}
    .status-line{display:flex;align-items:center;gap:9px;color:#dceee4;font-size:13px}
    .status-dot{width:9px;height:9px;border-radius:50%;background:#77c6a3;box-shadow:0 0 0 5px rgba(119,198,163,.13)}
    .section{padding:78px 0}
    .section.alt{background:var(--sand)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section h2{font-size:clamp(27px,3vw,40px);line-height:1.25;letter-spacing:-.035em;margin:8px 0 0}
    .section-intro{max-width:520px;color:var(--muted);line-height:1.85;margin:0}
    .step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .step-card{
      min-height:190px;padding:24px 21px;background:var(--cream);
      border:1px solid var(--line);border-radius:var(--radius);transition:.2s;
    }
    .step-card:hover,.entry-card:hover,.device-row:hover,.faq details:hover{
      transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d4c5ad;
    }
    .step-number{
      width:35px;height:35px;border-radius:10px;background:var(--mint);color:var(--teal);
      display:grid;place-items:center;font-weight:800;
    }
    .step-card h3{font-size:17px;margin:17px 0 7px}
    .step-card p,.entry-card p,.device-row p{color:var(--muted);font-size:13px;line-height:1.75;margin-bottom:0}
    .entry-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .entry-card{
      display:flex;justify-content:space-between;gap:20px;align-items:center;
      padding:25px;background:var(--cream);border:1px solid var(--line);
      border-radius:16px;transition:.2s;
    }
    .entry-card h3{font-size:19px;margin:12px 0 5px}
    .entry-icon{
      width:43px;height:43px;border-radius:13px;background:var(--ink);color:#f5c879;
      display:grid;place-items:center;font-size:20px;flex:0 0 auto;
    }
    .entry-card .btn{white-space:nowrap;padding:9px 13px;font-size:13px}
    .badge{
      display:inline-flex;align-items:center;gap:6px;border-radius:30px;padding:5px 10px;
      font-size:12px;font-weight:700;
    }
    .badge-mint{background:var(--mint);color:var(--teal)}
    .badge-warm{background:#f8ead3;color:var(--orange-deep)}
    .device-table{border-top:1px solid var(--line)}
    .device-row{
      display:grid;grid-template-columns:170px 1fr 170px;gap:24px;align-items:center;
      padding:22px 18px;border-bottom:1px solid var(--line);transition:.2s;
    }
    .device-name{display:flex;align-items:center;gap:12px;font-size:18px;font-weight:800}
    .device-symbol{
      width:38px;height:38px;border:1px solid #c9d8cf;border-radius:11px;
      display:grid;place-items:center;color:var(--teal);background:#f1f7f2;
    }
    .device-row .btn{font-size:13px;padding:9px 12px;justify-self:end}
    .check-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:20px;align-items:stretch}
    .check-panel{
      padding:30px;background:var(--ink);color:#fff;border-radius:22px;
      display:flex;flex-direction:column;justify-content:center;
    }
    .check-panel h3{font-size:27px;line-height:1.35;margin:12px 0}
    .check-panel p{color:#cbd9d1;font-size:14px}
    .check-panel .btn{align-self:flex-start;margin-top:10px;background:#f5c879;color:var(--ink)}
    .check-panel .btn:hover{background:#ffd991}
    .check-list{display:grid;grid-template-columns:1fr 1fr;gap:13px}
    .check-item{
      padding:21px;background:var(--cream);border:1px solid var(--line);border-radius:14px;
    }
    .check-item strong{display:flex;gap:9px;align-items:center;font-size:15px}
    .check-mark{color:var(--teal);font-weight:900}
    .check-item p{color:var(--muted);font-size:13px;line-height:1.7;margin:8px 0 0}
    .help-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .help-box{padding:26px;background:var(--cream);border:1px solid var(--line);border-radius:17px}
    .help-box h3{font-size:19px;margin:0 0 11px}
    .help-box ul{padding-left:20px;margin:0;color:var(--muted);font-size:14px}
    .help-box li{margin:7px 0}
    .faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .faq details{
      padding:18px 20px;background:var(--cream);border:1px solid var(--line);
      border-radius:13px;transition:.2s;
    }
    .faq summary{cursor:pointer;font-weight:700;list-style:none;padding-right:20px;position:relative}
    .faq summary::-webkit-details-marker{display:none}
    .faq summary:after{content:"＋";position:absolute;right:0;color:var(--orange-deep);font-size:20px;line-height:1}
    .faq details[open] summary:after{content:"－"}
    .faq details p{color:var(--muted);font-size:13px;line-height:1.8;margin:13px 0 0}
    .cta-band{
      padding:42px 48px;background:#e4eee7;border:1px solid #d0e2d7;
      border-radius:22px;display:flex;justify-content:space-between;align-items:center;gap:25px;
    }
    .cta-band h2{font-size:30px;letter-spacing:-.03em;margin:0 0 7px}
    .cta-band p{color:var(--muted);margin:0}
    .cta-actions{display:flex;gap:11px;flex-wrap:wrap;flex:0 0 auto}
    .site-footer{padding:55px 0 25px;background:var(--ink-deep);color:#dce8df}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;padding-bottom:40px}
    .footer-brand{font-size:21px;font-weight:800;color:#fff;margin-bottom:10px}
    .footer-desc{max-width:270px;color:#aebeb5;font-size:13px;line-height:1.8}
    .site-footer h3{font-size:14px;color:#f5c879;margin:2px 0 14px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:8px 0}
    .site-footer li a{color:#b6c5bd;font-size:13px;transition:.2s}
    .site-footer li a:hover{color:#f5c879}
    .copyright{
      padding-top:20px;border-top:1px solid rgba(255,255,255,.13);
      display:flex;justify-content:space-between;gap:20px;color:#91a59a;font-size:12px;
    }
    @media(max-width:1024px){
      .main-nav{gap:16px}
      .header-inner{gap:18px}
      .intro-grid{gap:35px}
      .step-grid{grid-template-columns:repeat(2,1fr)}
      .device-row{grid-template-columns:145px 1fr 140px}
    }
    @media(max-width:768px){
      .site-header{height:68px}
      .container{width:min(var(--container),calc(100% - 32px))}
      .header-inner{justify-content:space-between}
      .main-nav{
        display:none;position:absolute;left:16px;right:16px;top:66px;
        padding:10px 18px;background:var(--cream);border:1px solid var(--line);
        border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0;
      }
      .main-nav.open{display:flex}
      .main-nav a{padding:11px 0;border-bottom:1px solid var(--line)}
      .main-nav a:last-child{border-bottom:0}
      .main-nav a.active:after{bottom:8px;right:auto;width:24px}
      .menu-toggle{display:block}
      .header-cta{padding:9px 12px;font-size:13px}
      .page-intro{padding:48px 0 45px}
      .intro-grid,.entry-layout,.check-layout,.help-grid{grid-template-columns:1fr;gap:25px}
      .section{padding:58px 0}
      .section-head{display:block}
      .section-intro{margin-top:13px}
      .step-grid,.check-list,.faq{grid-template-columns:1fr}
      .device-row{grid-template-columns:1fr;gap:10px;padding:20px 0}
      .device-row .btn{justify-self:start}
      .cta-band{padding:30px 24px;display:block}
      .cta-actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }
    @media(max-width:520px){
      h1{font-size:38px}
      .brand{font-size:16px}
      .brand-mark{width:29px;height:29px}
      .intro-copy{font-size:15px}
      .entry-card{align-items:flex-start;flex-direction:column}
      .entry-card .btn{align-self:flex-start}
      .cta-band h2{font-size:25px}
      .footer-grid{grid-template-columns:1fr}
    }

/* roulang page: category2 */
:root{
      --ink:#17352e;
      --ink-deep:#102821;
      --muted:#6d7772;
      --paper:#fbf8f1;
      --sand:#f2ede2;
      --cream:#fffdf8;
      --line:#e7dfd1;
      --orange:#d58c38;
      --orange-deep:#b96d20;
      --mint:#dceee4;
      --teal:#2d7665;
      --danger:#a86642;
      --radius:18px;
      --shadow:0 16px 40px rgba(37,50,42,.08);
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible{outline:3px solid rgba(213,140,56,.35);outline-offset:3px}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{height:78px;background:rgba(251,248,241,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
    .brand-mark{width:31px;height:31px;border-radius:10px;background:var(--ink);color:#f5c879;display:grid;place-items:center;font-size:19px}
    .main-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
    .main-nav a{color:#5e6c65;font-size:14px;position:relative;padding:27px 0;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:var(--ink);font-weight:700}
    .main-nav a.active:after{content:"";position:absolute;bottom:14px;left:0;right:0;height:3px;border-radius:3px;background:var(--orange)}
    .header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-weight:700;transition:.22s ease}
    .header-cta,.btn-primary{background:var(--ink);color:#fff}
    .header-cta:hover,.btn-primary:hover{background:var(--ink-deep);transform:translateY(-2px);box-shadow:0 8px 18px rgba(23,53,46,.18)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}
    .btn-secondary:hover{border-color:var(--orange);color:var(--orange-deep);transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;color:var(--ink);font-size:24px}
    .page-intro{padding:68px 0 54px;background:linear-gradient(120deg,#fbf8f1,#f3ecdf);border-bottom:1px solid var(--line)}
    .breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:24px}
    .breadcrumbs a{color:var(--teal)}
    .intro-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:end}
    .eyebrow,.section-kicker{color:var(--orange-deep);font-size:12px;font-weight:800;letter-spacing:.14em}
    h1{font-size:clamp(36px,5vw,60px);line-height:1.18;letter-spacing:-.055em;margin:13px 0 18px}
    .intro-copy{font-size:18px;color:var(--muted);max-width:680px}
    .intro-note{padding:23px;background:var(--cream);border:1px solid var(--line);border-radius:16px}
    .intro-note strong{display:block;font-size:17px;margin-bottom:7px}
    .intro-note span{color:var(--muted);font-size:13px}
    .section{padding:76px 0}
    .section.alt{background:var(--sand)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    h2{font-size:clamp(27px,3vw,40px);line-height:1.25;letter-spacing:-.035em;margin:8px 0 0}
    .section-intro{max-width:535px;color:var(--muted);line-height:1.85}
    .matrix{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--cream)}
    .matrix-item{padding:28px 25px;border-right:1px solid var(--line)}
    .matrix-item:last-child{border-right:0}
    .device-icon{width:46px;height:46px;border-radius:13px;background:var(--mint);display:grid;place-items:center;color:var(--teal);font-size:22px;margin-bottom:20px}
    .matrix-item h3{font-size:20px;margin:0 0 8px}
    .matrix-item p{color:var(--muted);font-size:14px;margin:0 0 17px}
    .tag{display:inline-flex;padding:5px 10px;border-radius:20px;background:#f5ead8;color:var(--orange-deep);font-size:12px;font-weight:700}
    .download-panel{display:grid;grid-template-columns:.72fr 1.28fr;gap:34px;padding:34px;background:var(--ink);color:#fff;border-radius:22px;box-shadow:var(--shadow)}
    .qr-area{display:flex;align-items:center;justify-content:center;min-height:230px;background:#eef3e9;border-radius:15px}
    .qr{width:145px;height:145px;background:repeating-conic-gradient(#17352e 0 8%,#fff 0 16%);border:10px solid #fff;box-shadow:0 4px 16px rgba(0,0,0,.12)}
    .download-panel h2{margin-top:8px;color:#fff}
    .download-panel p{color:#cbd9d0;max-width:590px}
    .download-meta{display:flex;gap:22px;flex-wrap:wrap;margin:20px 0;color:#dbe8df;font-size:13px}
    .download-actions{display:flex;gap:11px;flex-wrap:wrap}
    .download-actions .btn-secondary{background:transparent;color:#fff;border-color:rgba(255,255,255,.3)}
    .install-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .install-card{padding:28px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .install-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d4c5ad}
    .install-card h3{font-size:20px;margin:0 0 9px}
    .install-card p{color:var(--muted);font-size:14px;margin:0}
    .install-card ul{margin:18px 0 0;padding-left:19px;color:var(--muted);font-size:13px}
    .switch-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .switch-box{padding:30px;border-radius:18px;background:#e4eee7;border:1px solid #d1e1d7}
    .switch-box.dark{background:#f5ead8;border-color:#ead7b9}
    .switch-box h3{font-size:22px;margin:0 0 10px}
    .switch-box p{color:var(--muted);margin:0}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}
    .step{padding:25px 20px 10px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-num{color:var(--orange-deep);font-weight:800;font-size:13px}
    .step h3{font-size:17px;margin:10px 0 6px}
    .step p{font-size:13px;color:var(--muted);margin:0}
    .update-list{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
    .update-card{padding:23px;background:var(--cream);border:1px solid var(--line);border-top:3px solid var(--orange);border-radius:14px}
    .update-card strong{font-size:18px}
    .update-card time{display:block;color:var(--muted);font-size:12px;margin:6px 0 10px}
    .update-card p{font-size:13px;color:var(--muted);margin:0}
    .faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .faq details{background:var(--cream);border:1px solid var(--line);border-radius:13px;padding:18px 20px}
    .faq summary{font-weight:700;cursor:pointer;list-style:none;padding-right:20px;position:relative}
    .faq summary::-webkit-details-marker{display:none}
    .faq summary:after{content:"+";position:absolute;right:0;color:var(--orange-deep);font-size:20px;line-height:1}
    .faq details[open] summary:after{content:"−"}
    .faq details p{color:var(--muted);font-size:13px;margin:12px 0 0}
    .cta{padding:58px 0;background:var(--mint)}
    .cta-inner{display:flex;justify-content:space-between;align-items:center;gap:25px}
    .cta h2{margin:0 0 9px}
    .cta p{color:var(--muted);margin:0}
    .cta-actions{display:flex;gap:11px;flex-wrap:wrap}
    .site-footer{background:var(--ink-deep);color:#dbe8df;padding:53px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}
    .footer-brand{font-size:20px;font-weight:800;color:#fff}
    .footer-desc{color:#9eb2a7;font-size:13px;max-width:260px}
    .site-footer h3{font-size:14px;color:#fff;margin:3px 0 14px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:8px 0}
    .site-footer a{color:#aebfb5;font-size:13px;transition:.2s}
    .site-footer a:hover{color:#f5c879}
    .copyright{display:flex;justify-content:space-between;gap:15px;border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:19px;color:#849c90;font-size:12px}
    @media(max-width:1024px){
      .main-nav{gap:15px}.header-inner{gap:18px}
      .intro-layout,.download-panel{gap:30px}
    }
    @media(max-width:768px){
      .site-header{height:68px}.header-inner{justify-content:space-between}
      .main-nav{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 24px 20px;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0}
      .main-nav.open{display:flex}.main-nav a{padding:11px 0}.main-nav a.active:after{bottom:7px;right:auto;width:30px}
      .menu-toggle{display:block}.header-cta{padding:9px 13px;font-size:13px}
      .container{width:min(var(--container),calc(100% - 32px))}
      .page-intro{padding:48px 0 42px}.intro-layout,.download-panel,.install-grid,.switch-layout{grid-template-columns:1fr}
      .matrix{grid-template-columns:1fr}.matrix-item{border-right:0;border-bottom:1px solid var(--line)}.matrix-item:last-child{border-bottom:0}
      .steps{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .update-list{grid-template-columns:1fr}
      .faq{grid-template-columns:1fr}
      .cta-inner{display:block}.cta-actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}
    }
    @media(max-width:520px){
      h1{font-size:37px}.section{padding:56px 0}.section-head{display:block}
      .section-intro{margin-top:13px}.qr-area{min-height:190px}
      .steps{grid-template-columns:1fr}.step{border-right:0!important;border-bottom:1px solid var(--line)!important}.step:last-child{border-bottom:0!important}
      .footer-grid{grid-template-columns:1fr}.brand{font-size:16px}.brand-mark{width:29px;height:29px}
      .header-cta{font-size:12px;padding:8px 10px}
    }

/* roulang page: category3 */
:root{
      --ink:#17352e;
      --ink-deep:#102821;
      --muted:#6d7772;
      --paper:#fbf8f1;
      --sand:#f2ede2;
      --cream:#fffdf8;
      --line:#e7dfd1;
      --orange:#d58c38;
      --orange-deep:#b96d20;
      --mint:#dceee4;
      --teal:#2d7665;
      --danger:#a86642;
      --radius:18px;
      --shadow:0 16px 40px rgba(37,50,42,.08);
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(213,140,56,.35);outline-offset:3px}
    button,input{font:inherit}
    button{cursor:pointer;border:0}
    img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{height:78px;background:rgba(251,248,241,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:800;letter-spacing:.02em;white-space:nowrap}
    .brand-mark{width:31px;height:31px;border-radius:10px;background:var(--ink);color:#f5c879;display:grid;place-items:center;font-size:19px}
    .main-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
    .main-nav a{color:#5e6c65;font-size:14px;position:relative;padding:27px 0;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:var(--ink);font-weight:700}
    .main-nav a.active:after{content:"";position:absolute;bottom:14px;left:0;right:0;height:3px;border-radius:3px;background:var(--orange)}
    .header-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;padding:11px 18px;font-weight:700;transition:.22s ease}
    .header-cta,.btn-primary{background:var(--ink);color:#fff}
    .header-cta:hover,.btn-primary:hover{background:var(--ink-deep);transform:translateY(-2px);box-shadow:0 8px 18px rgba(23,53,46,.18)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}
    .btn-secondary:hover{border-color:var(--orange);color:var(--orange-deep);transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;color:var(--ink);font-size:24px}
    .page-intro{padding:72px 0 64px;background:linear-gradient(120deg,#fbf8f1 0%,#f4eddf 100%);border-bottom:1px solid var(--line)}
    .intro-layout{display:grid;grid-template-columns:1fr 330px;gap:70px;align-items:end}
    .eyebrow,.section-kicker{color:var(--orange-deep);font-size:12px;font-weight:800;letter-spacing:.14em}
    .page-intro h1{font-size:clamp(36px,5vw,60px);line-height:1.2;letter-spacing:-.055em;margin:16px 0 19px;max-width:730px}
    .page-intro h1 em{font-style:normal;color:var(--teal)}
    .intro-copy{font-size:17px;color:var(--muted);max-width:700px;line-height:1.9;margin:0}
    .crumbs{display:flex;gap:9px;flex-wrap:wrap;color:var(--muted);font-size:13px;margin-bottom:22px}
    .crumbs a:hover{color:var(--orange-deep)}
    .guide-index{padding:23px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .guide-index strong{display:block;font-size:16px;margin-bottom:12px}
    .index-row{display:flex;align-items:center;gap:10px;padding:9px 0;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
    .index-row b{color:var(--orange-deep);font-size:12px}
    .section{padding:78px 0}
    .section.alt{background:var(--sand)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section h2{font-size:clamp(27px,3vw,40px);line-height:1.25;letter-spacing:-.035em;margin:8px 0 0}
    .section-intro{max-width:520px;color:var(--muted);line-height:1.85;margin:0}
    .check-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:42px;align-items:start}
    .check-lead{background:var(--ink);color:#fff;padding:32px;border-radius:22px;min-height:270px}
    .check-lead .badge{background:rgba(220,238,228,.14);color:#cce8d9}
    .check-lead h3{font-size:27px;line-height:1.35;margin:25px 0 10px}
    .check-lead p{color:#cbd8d0;margin:0;font-size:14px}
    .check-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .check-item{background:var(--cream);border:1px solid var(--line);padding:21px;border-radius:14px;display:flex;gap:14px;transition:.2s}
    .check-item:hover,.guide-card:hover,.issue-card:hover,.switch-panel:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d4c5ad}
    .check-icon{width:28px;height:28px;border-radius:50%;background:var(--mint);color:var(--teal);display:grid;place-items:center;flex:0 0 auto;font-weight:800}
    .check-item h3{font-size:16px;margin:0 0 4px}
    .check-item p{color:var(--muted);font-size:13px;margin:0;line-height:1.75}
    .guide-list{border-top:1px solid var(--line)}
    .guide-card{display:grid;grid-template-columns:72px 1fr auto;gap:22px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line);transition:.2s}
    .guide-no{font-size:28px;font-weight:800;color:var(--orange);letter-spacing:-.05em}
    .guide-card h3{font-size:18px;margin:0 0 5px}
    .guide-card p{color:var(--muted);font-size:13px;margin:0;max-width:680px}
    .guide-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px;color:var(--muted);font-size:12px}
    .tag{display:inline-flex;padding:4px 9px;border-radius:7px;background:var(--mint);color:var(--teal);font-weight:700}
    .guide-link{color:var(--orange-deep);font-size:13px;font-weight:800;white-space:nowrap}
    .guide-link:hover{text-decoration:underline}
    .notice{margin-top:22px;padding:16px 20px;background:#fff8e9;border:1px solid #edd9af;border-radius:12px;color:#7c633c;font-size:13px}
    .issue-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .issue-card{padding:25px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .issue-label{color:var(--danger);font-size:12px;font-weight:800;letter-spacing:.08em}
    .issue-card h3{font-size:18px;margin:13px 0 8px}
    .issue-card p{color:var(--muted);font-size:13px;margin:0 0 17px}
    .issue-card ol{padding-left:19px;color:var(--ink);font-size:13px;margin:0}
    .issue-card li{padding:4px 0}
    .switch-layout{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .switch-panel{padding:28px;background:var(--cream);border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .switch-panel h3{font-size:20px;margin:15px 0 8px}
    .switch-panel p{color:var(--muted);font-size:14px;margin:0 0 16px}
    .switch-line{display:flex;gap:12px;padding:11px 0;border-top:1px solid var(--line);font-size:13px}
    .switch-line b{min-width:58px;color:var(--teal)}
    .faq{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .faq details{background:var(--cream);border:1px solid var(--line);border-radius:13px;padding:17px 20px;transition:.2s}
    .faq details[open]{border-color:#cbb895;box-shadow:0 8px 20px rgba(37,50,42,.05)}
    .faq summary{cursor:pointer;font-weight:700;list-style:none;padding-right:20px;position:relative}
    .faq summary::-webkit-details-marker{display:none}
    .faq summary:after{content:"+";position:absolute;right:0;color:var(--orange-deep);font-size:20px;line-height:1}
    .faq details[open] summary:after{content:"−"}
    .faq p{color:var(--muted);font-size:13px;line-height:1.8;margin:12px 0 0}
    .cta{padding:48px 0;background:var(--mint)}
    .cta-box{display:flex;justify-content:space-between;align-items:center;gap:28px}
    .cta h2{font-size:30px;line-height:1.3;margin:0 0 8px}
    .cta p{color:var(--muted);margin:0}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
    .site-footer{background:var(--ink-deep);color:#dce8df;padding:57px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px;padding-bottom:42px}
    .footer-brand{font-size:21px;font-weight:800;color:#fff;margin-bottom:12px}
    .footer-desc{color:#aebeb5;font-size:13px;max-width:260px;line-height:1.8}
    .site-footer h3{font-size:14px;color:#fff;margin:0 0 15px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:8px 0;color:#aebeb5;font-size:13px}
    .site-footer a:hover{color:#f5c879}
    .copyright{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;display:flex;justify-content:space-between;gap:15px;color:#93a69b;font-size:12px;flex-wrap:wrap}
    @media (max-width:1024px){
      .header-inner{gap:18px}.main-nav{gap:16px}
      .intro-layout{gap:35px}.check-layout{gap:25px}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 34px))}
      .site-header{height:68px}.header-inner{gap:12px}
      .brand{font-size:16px}.brand-mark{width:28px;height:28px}
      .main-nav{display:none;position:absolute;left:17px;right:17px;top:62px;background:var(--cream);border:1px solid var(--line);padding:8px 18px;box-shadow:var(--shadow);border-radius:13px;flex-direction:column;align-items:stretch;gap:0}
      .main-nav.open{display:flex}.main-nav a{padding:12px 0;border-bottom:1px solid var(--line)}.main-nav a:last-child{border:0}.main-nav a.active:after{right:auto;bottom:11px;width:24px}
      .menu-toggle{display:block}.header-cta{padding:9px 12px;font-size:13px;margin-left:auto}
      .page-intro{padding:52px 0 45px}.intro-layout,.check-layout,.switch-layout{grid-template-columns:1fr}
      .guide-index{max-width:480px}.section{padding:58px 0}.section-head{display:block}.section-intro{margin-top:12px}
      .issue-grid{grid-template-columns:1fr 1fr}.faq{grid-template-columns:1fr}
      .cta-box{display:block}.cta-actions{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr}
    }
    @media (max-width:520px){
      .brand{font-size:14px}.brand-mark{font-size:16px}.header-cta{font-size:12px;padding:8px 10px}
      .page-intro h1{font-size:36px}.intro-copy{font-size:15px}
      .check-grid,.issue-grid{grid-template-columns:1fr}.guide-card{grid-template-columns:45px 1fr;gap:13px}.guide-link{grid-column:2}
      .guide-no{font-size:24px}.cta h2{font-size:25px}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.copyright{display:block}.copyright span{display:block;margin-top:6px}
    }