/* roulang page: index */
:root{
  --ink:#17151b;--ink-2:#242129;--paper:#f5f1ed;--paper-2:#fffdfa;
  --coral:#ef5d68;--coral-dark:#cf3f52;--mint:#8ad8c5;--gold:#f2bd73;
  --text:#29262d;--muted:#77717b;--line:#ded7d2;--white:#fff;
  --radius:18px;--shadow:0 18px 45px rgba(34,25,31,.10);--container:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--text);background:var(--paper);font-size:16px;line-height:1.8}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{border:0;cursor:pointer}
img{max-width:100%;display:block}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(255,255,255,.09)}
.header-inner{height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
.logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg)}
.logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
.logo strong{font-size:17px}
.main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
.main-nav a{font-size:14px;color:#c9c4ca;padding:8px 11px;border-radius:9px;transition:.2s}
.main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
.main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
.header-actions{display:flex;gap:9px;margin-left:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;border:1px solid transparent}
.btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
.btn-primary:hover{background:#ff7078;transform:translateY(-2px)}
.btn-dark{color:#fff;border-color:#56505a;background:transparent}
.btn-dark:hover{border-color:var(--coral);color:#ff9da3}
.btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
.btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
.menu-toggle{display:none;background:transparent;color:#fff;font-size:25px}
.hero{background:var(--ink);color:#fff;padding:76px 0 0;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center;padding-bottom:72px}
.eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
.hero h1{font-size:clamp(34px,4vw,52px);line-height:1.22;letter-spacing:-.055em;margin:17px 0 20px;max-width:680px}
.hero h1 em{font-style:normal;color:#ff8a8d}
.hero-lead{color:#c9c4ca;max-width:610px;font-size:17px;line-height:1.9}
.hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.hero-note{margin-top:18px;color:#8f8992;font-size:13px}
.screen-stage{min-height:400px;position:relative;display:flex;align-items:center;justify-content:center}
.screen-orbit{position:absolute;width:360px;height:360px;border:1px solid #47414b;border-radius:50%;box-shadow:0 0 0 28px rgba(255,255,255,.02),0 0 0 56px rgba(255,255,255,.015)}
.simulator-window{width:min(440px,100%);background:#29252e;border:1px solid #5a515c;border-radius:20px;padding:17px;box-shadow:0 24px 65px rgba(0,0,0,.38);position:relative;z-index:1;transform:rotate(2deg)}
.window-bar{display:flex;align-items:center;gap:7px;color:#aca5ad;font-size:11px;margin-bottom:15px}
.dot{width:8px;height:8px;border-radius:50%;background:#ef5d68}.dot:nth-child(2){background:#f2bd73}.dot:nth-child(3){background:#8ad8c5}
.window-label{margin-left:auto}
.sim-display{height:225px;border-radius:13px;background:linear-gradient(135deg,#482b4b,#c65365 52%,#f1a071);position:relative;overflow:hidden;padding:22px}
.sim-display:before{content:"PG · PLAY VIEW";position:absolute;right:-19px;bottom:22px;transform:rotate(-90deg);font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.65)}
.sim-display h3{font-size:26px;line-height:1.2;color:#fff;max-width:190px;margin-top:35px}
.sim-display p{font-size:12px;color:#ffe9df;margin-top:10px}
.sim-controls{display:flex;gap:9px;margin-top:13px}
.control{height:31px;background:#403a45;border-radius:7px;flex:1;border:1px solid #625a64}.control:last-child{background:var(--coral);border-color:var(--coral)}
.device-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 10px;font-size:12px;color:var(--muted);background:var(--paper-2)}
.tag.dark{border-color:#554d59;color:#d8d1d8;background:#332e37}
.info-strip{background:#242129;border-top:1px solid #3a343e}
.info-strip-inner{display:grid;grid-template-columns:repeat(4,1fr)}
.info-item{padding:20px 18px;border-right:1px solid #3a343e}
.info-item:last-child{border:0}.info-item b{display:block;color:#fff;font-size:14px}.info-item span{font-size:12px;color:#918a94}
.section{padding:92px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:34px}
.section-head h2{font-size:31px;line-height:1.25;letter-spacing:-.04em;margin-top:9px}
.section-head p{color:var(--muted);max-width:480px}
.feature-layout{display:grid;grid-template-columns:245px 1fr;gap:22px}
.feature-index{background:var(--ink);padding:16px;border-radius:var(--radius);align-self:stretch}
.feature-index a{display:block;color:#aaa3ad;padding:16px;border-radius:12px;border-bottom:1px solid #3c3740;font-size:14px;transition:.2s}
.feature-index a:first-child,.feature-index a:hover{color:#fff;background:var(--coral)}
.feature-panel{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:35px;box-shadow:var(--shadow);display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}
.panel-copy h3{font-size:26px;margin:12px 0 10px}.panel-copy p{color:var(--muted);font-size:15px}
.check-list{list-style:none;margin:20px 0}.check-list li{padding:7px 0 7px 27px;position:relative;font-size:14px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--coral);font-weight:800}
.panel-art{min-height:250px;background:#302a34;border-radius:15px;padding:24px;display:flex;flex-direction:column;justify-content:space-between;color:#fff;position:relative;overflow:hidden}
.panel-art:after{content:"";position:absolute;width:190px;height:190px;border:35px solid rgba(239,93,104,.25);border-radius:50%;right:-45px;top:-55px}
.art-top{display:flex;justify-content:space-between;color:#bcb4bd;font-size:12px}.art-code{font-size:52px;font-weight:800;color:#ff7e83;line-height:1}.art-bottom{font-size:13px;color:#d5ced5;max-width:170px}
.download-section{background:#e9e2dc}.download-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:42px;align-items:center}
.device-card{background:var(--ink);border-radius:25px;min-height:360px;display:flex;justify-content:center;align-items:center;position:relative;overflow:hidden}
.device{width:166px;height:298px;border:7px solid #58515a;border-radius:28px;background:#352d39;padding:10px;box-shadow:0 20px 40px rgba(0,0,0,.25)}
.device-notch{height:13px;width:62px;background:#151218;border-radius:0 0 10px 10px;margin:auto}
.device-screen{margin-top:15px;height:235px;border-radius:15px;background:linear-gradient(160deg,#ec6d70,#693852);padding:15px;color:#fff}.device-screen b{font-size:20px;line-height:1.2;display:block;margin-top:40px}
.download-panel h2{font-size:31px;line-height:1.3;margin:9px 0 14px}.download-panel>p{color:var(--muted)}
.download-box{background:var(--paper-2);border:1px solid var(--line);border-radius:15px;padding:21px;margin:24px 0;display:flex;align-items:center;gap:20px}
.qr{width:78px;height:78px;background:repeating-linear-gradient(45deg,#222 0 4px,#fff 4px 8px);border:7px solid #fff;box-shadow:0 0 0 1px var(--line)}
.download-box strong{display:block;font-size:16px}.download-box small{color:var(--muted);display:block;margin-top:4px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}.step{padding:18px;background:rgba(255,255,255,.56);border-radius:13px}.step-no{color:var(--coral);font-size:12px;font-weight:800}.step h4{font-size:15px;margin:5px 0}.step p{font-size:13px;color:var(--muted);line-height:1.6}
.brand-band{background:var(--ink-2);color:#fff;padding:45px;border-radius:var(--radius);display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}
.brand-band h2{font-size:30px;line-height:1.3;margin:10px 0}.brand-band p{color:#beb7c0}.brand-list{display:grid;grid-template-columns:1fr 1fr;gap:11px}.brand-chip{padding:17px;border:1px solid #4b444f;border-radius:12px;color:#d7d0d7;background:#2b2630}.brand-chip b{display:block;color:var(--mint);font-size:13px;margin-bottom:3px}.brand-chip span{font-size:13px}
.timeline{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:1px solid var(--line);padding-top:28px}.timeline-item{position:relative;padding:0 20px 0 0}.timeline-item:not(:last-child):after{content:"";position:absolute;right:18px;top:9px;width:32px;border-top:1px dashed #c8beb7}.timeline-item b{display:block;width:28px;height:28px;border-radius:50%;background:var(--coral);color:#fff;text-align:center;font-size:13px;line-height:28px}.timeline-item h4{font-size:15px;margin:13px 0 5px}.timeline-item p{font-size:13px;color:var(--muted);line-height:1.65}
.news-section{background:var(--paper-2)}.news-layout{display:grid;grid-template-columns:1fr .9fr;gap:22px}.news-lead,.news-list{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:28px}.news-lead{min-height:250px;display:flex;flex-direction:column;justify-content:space-between}.news-lead h3{font-size:25px;line-height:1.4;max-width:540px}.news-lead p{color:var(--muted);font-size:14px;max-width:560px}.news-meta{font-size:12px;color:#89818a;display:flex;gap:13px}.news-item{padding:15px 0;border-bottom:1px solid #eee7e2}.news-item:last-child{border:0}.news-item h4{font-size:15px;line-height:1.5}.news-item p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.news-item a{color:var(--coral-dark);font-size:12px}.empty-state{padding:30px;text-align:center;color:var(--muted);background:#faf7f4;border-radius:12px;font-size:14px}
.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:45px}.faq-intro h2{font-size:30px;line-height:1.35;margin:10px 0}.faq-intro p{color:var(--muted)}.faq-list details{border-bottom:1px solid var(--line);padding:18px 0}.faq-list summary{cursor:pointer;font-weight:700;list-style:none;padding-right:25px;position:relative}.faq-list summary:after{content:"+";position:absolute;right:0;color:var(--coral);font-size:21px}.faq-list details[open] summary:after{content:"−"}.faq-list details p{color:var(--muted);font-size:14px;padding:12px 28px 0 0}
.cta{background:var(--coral);color:#fff;padding:42px 0}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}.cta h2{font-size:28px;line-height:1.3}.cta p{color:#ffe7e6;margin-top:5px}.cta .btn-light{background:#fff;color:var(--coral-dark)}
.site-footer{background:var(--ink);color:#fff;padding:58px 0 25px}.footer-grid{display:grid;grid-template-columns:1.35fr repeat(4,1fr);gap:28px;padding-bottom:45px}.footer-brand p{color:#96909a;font-size:13px;max-width:260px;margin-top:15px}.footer-col h4{font-size:14px;margin-bottom:14px}.footer-col a{display:block;color:#9e979f;font-size:13px;margin:8px 0;transition:.2s}.footer-col a:hover{color:#ff8589}.copyright{border-top:1px solid #37323b;padding-top:20px;color:#817a84;font-size:12px;display:flex;justify-content:space-between;gap:20px}
@media(max-width:1100px){.main-nav{gap:0}.main-nav a{padding:8px 7px}.hero-grid{gap:35px}.footer-grid{grid-template-columns:1.4fr repeat(2,1fr)}}
@media(max-width:820px){.container{width:min(100% - 32px,680px)}.main-nav,.header-actions{display:none}.menu-toggle{display:block;margin-left:auto}.header-inner{height:68px}.hero{padding-top:45px}.hero-grid,.download-layout,.news-layout,.brand-band,.faq-grid{grid-template-columns:1fr}.screen-stage{min-height:330px}.info-strip-inner{grid-template-columns:repeat(2,1fr)}.info-item:nth-child(2){border-right:0}.info-item:nth-child(-n+2){border-bottom:1px solid #3a343e}.feature-layout{grid-template-columns:1fr}.feature-index{display:grid;grid-template-columns:repeat(2,1fr);gap:5px}.feature-index a{padding:11px}.feature-panel{grid-template-columns:1fr}.timeline{grid-template-columns:1fr;gap:24px}.timeline-item{padding-left:42px}.timeline-item b{position:absolute;left:0;top:0}.timeline-item:not(:last-child):after{left:13px;right:auto;top:37px;height:25px;border-top:0;border-left:1px dashed #c8beb7}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}.cta-inner{align-items:flex-start;flex-direction:column}}
@media(max-width:520px){body{font-size:15px}.container{width:calc(100% - 28px)}.hero h1{font-size:31px}.hero-lead{font-size:15px}.hero-buttons .btn{width:100%}.section{padding:62px 0}.section-head{display:block}.section-head h2{font-size:25px}.section-head p{margin-top:13px}.simulator-window{padding:12px}.sim-display{height:185px}.sim-display h3{font-size:22px}.screen-orbit{width:280px;height:280px}.feature-panel{padding:22px}.download-box{align-items:flex-start;flex-direction:column}.steps{grid-template-columns:1fr}.brand-band{padding:25px}.brand-list{grid-template-columns:1fr}.news-lead,.news-list{padding:21px}.news-lead h3{font-size:21px}.footer-grid{grid-template-columns:1fr 1fr;gap:20px}.copyright{display:block}.copyright span{display:block;margin-top:8px}}

/* roulang page: article */
:root{
      --ink:#17151b;
      --ink-2:#242129;
      --paper:#f5f1ed;
      --paper-2:#fffdfa;
      --coral:#ef5d68;
      --coral-dark:#cf3f52;
      --mint:#8ad8c5;
      --gold:#f2bd73;
      --text:#29262d;
      --muted:#77717b;
      --line:#ded7d2;
      --white:#fff;
      --radius:18px;
      --shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);
      --container:1200px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
      font-size:16px;
      line-height:1.8;
    }
    a{color:inherit;text-decoration:none}
    a:hover{color:inherit}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}

    .site-header{
      position:sticky;
      top:0;
      z-index:20;
      color:#fff;
      background:var(--ink);
      border-bottom:1px solid rgba(255,255,255,.09);
    }
    .header-inner{
      min-height:76px;
      display:flex;
      align-items:center;
      gap:26px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:11px;
      font-weight:800;
      letter-spacing:-.03em;
      white-space:nowrap;
    }
    .logo-mark{
      width:33px;
      height:33px;
      flex:0 0 33px;
      position:relative;
      border-radius:10px 10px 10px 3px;
      background:var(--coral);
      transform:rotate(-8deg);
    }
    .logo-mark:after{
      content:"";
      position:absolute;
      width:10px;
      height:10px;
      right:6px;
      top:6px;
      border-radius:50%;
      background:var(--mint);
    }
    .logo strong{font-size:17px}
    .main-nav{
      display:flex;
      align-items:center;
      gap:5px;
      margin-left:auto;
    }
    .main-nav a{
      color:#c9c4ca;
      padding:8px 10px;
      border-radius:9px;
      font-size:14px;
      transition:.2s ease;
    }
    .main-nav a:hover,
    .main-nav a.active{
      color:#fff;
      background:rgba(239,93,104,.16);
    }
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:8px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:10px 18px;
      border:1px solid transparent;
      border-radius:11px;
      font-size:14px;
      font-weight:700;
      transition:.2s ease;
    }
    .btn:focus-visible,
    .main-nav a:focus-visible,
    .faq-question:focus-visible{
      outline:3px solid rgba(138,216,197,.75);
      outline-offset:3px;
    }
    .btn-primary{
      color:#fff;
      background:var(--coral);
      box-shadow:0 7px 20px rgba(239,93,104,.2);
    }
    .btn-primary:hover{color:#fff;background:#ff7078;transform:translateY(-2px)}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{color:#ff9da3;border-color:var(--coral)}
    .btn-light{color:var(--ink);background:#fff;border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{
      display:none;
      color:#fff;
      background:transparent;
      font-size:25px;
      line-height:1;
    }

    .article-hero{
      color:#fff;
      padding:68px 0 72px;
      background:
        radial-gradient(circle at 82% 25%,rgba(239,93,104,.18),transparent 30%),
        var(--ink);
    }
    .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin:0 0 26px;
      color:#9d969f;
      font-size:13px;
    }
    .breadcrumb a{color:#d7d0d7}
    .breadcrumb a:hover{color:#ff9da3}
    .breadcrumb .separator{color:#625b65}
    .article-head{max-width:900px}
    .article-label{
      display:inline-flex;
      align-items:center;
      min-height:28px;
      padding:4px 12px;
      color:#ffc0c2;
      border:1px solid rgba(239,93,104,.42);
      border-radius:99px;
      background:rgba(239,93,104,.13);
      font-size:12px;
      font-weight:800;
    }
    .article-head h1{
      max-width:900px;
      margin:18px 0 20px;
      color:#fff;
      font-size:clamp(32px,4.2vw,52px);
      line-height:1.25;
      letter-spacing:-.055em;
    }
    .article-summary{
      max-width:790px;
      margin:0;
      color:#c9c4ca;
      font-size:17px;
      line-height:1.9;
    }
    .article-meta{
      display:flex;
      flex-wrap:wrap;
      gap:14px 24px;
      margin-top:25px;
      color:#99919b;
      font-size:13px;
    }
    .article-meta strong{color:var(--mint);font-weight:600}

    .article-layout{
      display:grid;
      grid-template-columns:minmax(0,820px) 280px;
      gap:46px;
      align-items:start;
      padding:66px 0 86px;
    }
    .article-content{
      min-width:0;
      padding:42px 48px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:var(--paper-2);
      box-shadow:var(--shadow-soft);
    }
    .article-content h2{
      margin:36px 0 15px;
      padding-left:16px;
      border-left:4px solid var(--coral);
      color:var(--ink);
      font-size:27px;
      line-height:1.4;
      letter-spacing:-.03em;
    }
    .article-content h3{
      margin:28px 0 12px;
      color:var(--ink);
      font-size:21px;
      line-height:1.5;
    }
    .article-content p{margin:0 0 20px}
    .article-content ul,
    .article-content ol{
      margin:14px 0 24px;
      padding-left:25px;
    }
    .article-content li{padding:4px 0}
    .article-content blockquote{
      margin:26px 0;
      padding:18px 22px;
      color:#625b64;
      border-left:4px solid var(--mint);
      border-radius:0 12px 12px 0;
      background:#eef8f5;
    }
    .article-content img{
      width:100%;
      height:auto;
      margin:28px 0 8px;
      border:1px solid var(--line);
      border-radius:14px;
      background:#eee7e2;
    }
    .article-content figure{margin:26px 0}
    .article-content figcaption{
      color:var(--muted);
      text-align:center;
      font-size:13px;
    }
    .article-content table{
      width:100%;
      margin:24px 0;
      border-collapse:collapse;
      font-size:14px;
    }
    .article-content th,
    .article-content td{
      padding:12px 14px;
      text-align:left;
      border:1px solid var(--line);
    }
    .article-content th{background:#f0e9e4;color:var(--ink)}
    .article-content code{
      padding:2px 6px;
      color:var(--coral-dark);
      border-radius:5px;
      background:#f8e7e6;
      font-size:.9em;
    }
    .article-content pre{
      overflow:auto;
      padding:18px;
      color:#e8dde1;
      border-radius:12px;
      background:var(--ink);
      font-size:13px;
    }

    .not-found{
      padding:42px 20px;
      text-align:center;
      color:var(--muted);
    }
    .not-found strong{
      display:block;
      margin-bottom:18px;
      color:var(--ink);
      font-size:24px;
    }
    .sidebar{
      position:sticky;
      top:103px;
      display:grid;
      gap:16px;
    }
    .side-card{
      padding:23px;
      border:1px solid var(--line);
      border-radius:16px;
      background:var(--paper-2);
      box-shadow:var(--shadow-soft);
    }
    .side-card h3{
      margin:0 0 15px;
      color:var(--ink);
      font-size:17px;
    }
    .side-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.75}
    .side-card ul{list-style:none;margin:0;padding:0}
    .side-card li{border-bottom:1px solid #eee7e2}
    .side-card li:last-child{border-bottom:0}
    .side-card li a{
      display:block;
      padding:10px 0;
      color:#625b64;
      font-size:13px;
      transition:.2s;
    }
    .side-card li a:hover{padding-left:5px;color:var(--coral-dark)}
    .side-download{
      color:#fff;
      background:var(--ink-2);
      border-color:#39333d;
    }
    .side-download h3{color:#fff}
    .side-download p{color:#bdb5bf}
    .side-download .tag{
      margin:15px 4px 0 0;
      color:var(--mint);
      border-color:#4a5b59;
      background:#30373a;
    }

    .article-bottom{
      padding:0 0 88px;
    }
    .related-panel{
      display:grid;
      grid-template-columns:1fr auto;
      gap:25px;
      align-items:center;
      padding:30px 34px;
      color:#fff;
      border-radius:var(--radius);
      background:var(--ink-2);
    }
    .related-panel h2{margin:0 0 5px;font-size:23px}
    .related-panel p{margin:0;color:#bdb5bf;font-size:14px}

    .site-footer{
      padding:58px 0 24px;
      color:#c5bdc6;
      background:var(--ink);
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.55fr repeat(4,1fr);
      gap:30px;
      padding-bottom:45px;
    }
    .footer-brand p{
      max-width:260px;
      margin:18px 0 0;
      color:#958d98;
      font-size:13px;
      line-height:1.8;
    }
    .footer-col{display:flex;flex-direction:column;gap:9px}
    .footer-col h4{
      margin:0 0 9px;
      color:#fff;
      font-size:14px;
    }
    .footer-col a{
      color:#9d959f;
      font-size:13px;
      transition:.2s;
    }
    .footer-col a:hover{color:#ff9297;transform:translateX(2px)}
    .copyright{
      display:flex;
      justify-content:space-between;
      gap:18px;
      padding-top:22px;
      color:#756d78;
      border-top:1px solid #36313a;
      font-size:12px;
    }

    @media(max-width:1100px){
      .main-nav a{padding-left:7px;padding-right:7px;font-size:13px}
      .header-actions{display:none}
      .article-layout{grid-template-columns:minmax(0,1fr) 245px;gap:28px}
      .footer-grid{grid-template-columns:1.4fr repeat(4,1fr);gap:20px}
    }
    @media(max-width:820px){
      .container{width:min(var(--container),calc(100% - 36px))}
      .menu-toggle{display:block;margin-left:auto}
      .main-nav{
        display:none;
        position:absolute;
        left:18px;
        right:18px;
        top:70px;
        padding:10px;
        flex-direction:column;
        align-items:stretch;
        border:1px solid #3d3741;
        border-radius:14px;
        background:var(--ink-2);
        box-shadow:var(--shadow);
      }
      .main-nav.is-open{display:flex}
      .main-nav a{padding:12px 14px}
      .article-hero{padding:48px 0 55px}
      .article-layout{display:block;padding:42px 0 60px}
      .sidebar{
        position:static;
        grid-template-columns:repeat(2,1fr);
        margin-top:20px;
      }
      .article-bottom{padding-bottom:60px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
      .footer-brand{grid-column:1/-1}
    }
    @media(max-width:560px){
      .container{width:min(var(--container),calc(100% - 28px))}
      .header-inner{min-height:68px}
      .logo strong{font-size:14px}
      .logo-mark{width:29px;height:29px;flex-basis:29px}
      .article-head h1{font-size:31px}
      .article-summary{font-size:15px}
      .article-content{padding:27px 20px}
      .article-content h2{font-size:23px}
      .article-content h3{font-size:19px}
      .article-layout{padding-top:28px}
      .sidebar{display:block}
      .side-card{margin-top:14px}
      .related-panel{display:block;padding:25px 22px}
      .related-panel .btn{width:100%;margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-brand{grid-column:1/-1}
      .copyright{display:block}
      .copyright span{display:block;margin-top:7px}
    }

/* roulang page: category1 */
:root{
      --ink:#17151b;--ink-2:#242129;--paper:#f5f1ed;--paper-2:#fffdfa;
      --coral:#ef5d68;--coral-dark:#cf3f52;--mint:#8ad8c5;--gold:#f2bd73;
      --text:#29262d;--muted:#77717b;--line:#ded7d2;--white:#fff;
      --radius:18px;--shadow:0 18px 45px rgba(34,25,31,.10);--container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--text);background:var(--paper);font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(255,255,255,.09)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
    .logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg);flex:none}
    .logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
    .logo strong{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .main-nav a{font-size:14px;color:#c9c4ca;padding:8px 11px;border-radius:9px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
    .btn-primary:hover{background:#ff7078;transform:translateY(-2px)}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{border-color:var(--coral);color:#ff9da3}
    .btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;background:transparent;color:#fff;font-size:25px}
    .page-hero{background:var(--ink);color:#fff;padding:56px 0 64px}
    .crumb{color:#aaa3ad;font-size:13px;margin-bottom:23px}
    .crumb a:hover{color:#fff}
    .page-hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:55px;align-items:center}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    h1{font-size:clamp(35px,4vw,52px);line-height:1.22;letter-spacing:-.055em;margin:15px 0 18px}
    .page-hero p{color:#c9c4ca;font-size:17px;max-width:650px;margin:0}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .simulator-visual{min-height:290px;border:1px solid #4b444f;border-radius:24px;background:#28232c;padding:18px;box-shadow:0 18px 40px rgba(0,0,0,.22);transform:rotate(1deg)}
    .visual-top{height:31px;display:flex;align-items:center;gap:7px;border-bottom:1px solid #413a46;color:#a9a1ac;font-size:12px}
    .dot{width:8px;height:8px;border-radius:50%;background:var(--coral)}
    .dot:nth-child(2){background:var(--gold)}.dot:nth-child(3){background:var(--mint)}
    .visual-body{display:grid;grid-template-columns:82px 1fr;gap:14px;padding-top:17px}
    .visual-side{display:grid;gap:8px}
    .visual-side span{height:32px;border-radius:7px;background:#39323d;border:1px solid #4b434f}
    .visual-side span:first-child{background:var(--coral);border-color:var(--coral)}
    .visual-main{border-radius:12px;min-height:190px;padding:15px;background:linear-gradient(135deg,#49313b,#332b3d 48%,#1f3f43);position:relative;overflow:hidden}
    .visual-main:after{content:"PG";position:absolute;right:18px;bottom:-17px;font-size:110px;font-weight:900;color:rgba(255,255,255,.07)}
    .visual-line{height:9px;width:58%;background:#f4c080;border-radius:10px;margin:12px 0}
    .visual-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:24px}
    .visual-grid i{height:58px;border-radius:8px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.14)}
    .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:17px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 10px;font-size:12px;color:var(--muted);background:var(--paper-2)}
    .tag.dark{border-color:#554d59;color:#d8d1d8;background:#332e37}
    .section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:30px}
    .section-head h2{font-size:31px;line-height:1.25;letter-spacing:-.04em;margin:9px 0 0}
    .section-head p{color:var(--muted);max-width:490px;margin:0}
    .intro-strip{background:var(--paper-2);border-bottom:1px solid var(--line)}
    .strip-grid{display:grid;grid-template-columns:repeat(4,1fr)}
    .strip-item{padding:22px 18px;border-right:1px solid var(--line)}
    .strip-item:last-child{border:0}
    .strip-item b{display:block;font-size:15px}.strip-item span{font-size:13px;color:var(--muted)}
    .interface-layout{display:grid;grid-template-columns:1fr 1.12fr;gap:30px;align-items:stretch}
    .interface-card{background:var(--ink-2);border-radius:var(--radius);padding:29px;color:#fff;min-height:365px;position:relative;overflow:hidden}
    .interface-card:before{content:"";position:absolute;width:190px;height:190px;border:1px solid rgba(239,93,104,.35);border-radius:50%;right:-45px;bottom:-70px}
    .interface-card h3{font-size:25px;margin:10px 0 12px;position:relative}
    .interface-card p{color:#c3bcc5;position:relative;max-width:390px}
    .mini-screen{margin-top:27px;border:1px solid #514956;border-radius:13px;padding:14px;background:#302b35;position:relative}
    .mini-screen .bar{height:8px;background:var(--coral);border-radius:10px;width:42%;margin-bottom:13px}
    .mini-screen .blocks{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.blocks i{height:48px;background:#49404d;border-radius:7px}
    .feature-list{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    .feature-box{background:var(--paper-2);border:1px solid var(--line);border-radius:15px;padding:22px;transition:.2s}
    .feature-box:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#e6a0a5}
    .feature-box b{display:block;font-size:16px;margin-bottom:5px}.feature-box p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
    .number{display:inline-flex;width:29px;height:29px;align-items:center;justify-content:center;background:var(--coral);color:#fff;border-radius:9px;font-weight:800;font-size:13px;margin-bottom:13px}
    .steps-section{background:#e9e2dc}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .step{padding:27px 23px;border-right:1px solid var(--line);position:relative}.step:last-child{border:0}
    .step h3{font-size:17px;margin:10px 0 5px}.step p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
    .device-section{padding-top:80px}
    .device-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:center}
    .device-panel{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:31px}
    .device-panel h2{font-size:29px;line-height:1.35;margin:10px 0 14px}.device-panel p{color:var(--muted)}
    .check-list{list-style:none;margin:20px 0;padding:0}.check-list li{padding:7px 0 7px 27px;position:relative;font-size:14px}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--coral);font-weight:800}
    .device-art{background:#211d25;border-radius:22px;min-height:310px;padding:25px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
    .laptop{width:80%;border:8px solid #4b424f;border-bottom-width:15px;border-radius:12px;background:#332c38;padding:18px;box-shadow:0 22px 30px rgba(0,0,0,.25)}
    .laptop-screen{height:155px;border-radius:7px;background:linear-gradient(145deg,#3a3444,#57323d);padding:16px}.laptop-screen b{color:var(--mint);font-size:13px}.laptop-screen p{color:#fff;font-size:20px;margin:15px 0}
    .faq-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:45px}.faq-intro h2{font-size:30px;line-height:1.35;margin:10px 0}.faq-intro p{color:var(--muted)}
    .faq-list{display:grid;gap:10px}.faq-list details{background:var(--paper-2);border:1px solid var(--line);border-radius:13px;padding:0 20px}.faq-list summary{cursor:pointer;padding:17px 0;font-weight:700;list-style:none;position:relative;padding-right:25px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:0;color:var(--coral);font-size:21px}.faq-list details[open] summary:after{content:"−"}.faq-list p{color:var(--muted);font-size:14px;margin:0 0 17px}
    .cta{background:var(--coral);color:#fff;padding:42px 0}.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:25px}.cta h2{margin:0;font-size:28px;line-height:1.35}.cta p{margin:7px 0 0;color:#ffe4e5}.cta .btn-light{white-space:nowrap}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:28px}.footer-brand p{color:#aaa3ad;font-size:13px;max-width:280px;margin-top:17px}.footer-col{display:flex;flex-direction:column;gap:7px}.footer-col h4{font-size:14px;margin:0 0 9px}.footer-col a{font-size:13px;color:#aaa3ad;transition:.2s}.footer-col a:hover{color:#ff9196}.copyright{border-top:1px solid #39343d;margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#827b85;font-size:12px}
    :focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    @media(max-width:1050px){.main-nav{gap:0}.main-nav a{padding:8px 7px;font-size:13px}.header-actions{display:none}.page-hero-grid{gap:30px}.footer-grid{grid-template-columns:1.3fr repeat(4,1fr);gap:18px}}
    @media(max-width:768px){.container{width:min(var(--container),calc(100% - 32px))}.header-inner{height:68px}.logo strong{font-size:15px}.main-nav{display:none}.menu-toggle{display:block;margin-left:auto}.page-hero{padding:38px 0 45px}.page-hero-grid,.interface-layout,.device-grid,.faq-grid{grid-template-columns:1fr}.simulator-visual{min-height:245px}.section{padding:61px 0}.section-head{display:block}.section-head p{margin-top:12px}.strip-grid{grid-template-columns:1fr 1fr}.strip-item:nth-child(2){border-right:0}.strip-item:nth-child(-n+2){border-bottom:1px solid var(--line)}.feature-list{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}.cta-inner{display:block}.cta .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:5px}}
    @media(max-width:520px){h1{font-size:34px}.hero-buttons .btn{width:100%}.strip-grid{grid-template-columns:1fr}.strip-item{border-right:0!important;border-bottom:1px solid var(--line)!important}.strip-item:last-child{border-bottom:0!important}.steps{grid-template-columns:1fr}.step{border-right:0!important;border-bottom:1px solid var(--line)}.step:last-child{border-bottom:0}.interface-card,.device-panel{padding:23px}.laptop{width:100%}.footer-grid{grid-template-columns:1fr 1fr}.footer-col h4{font-size:13px}}

/* roulang page: category1 */
:root{
      --ink:#17151b;--ink-2:#242129;--paper:#f5f1ed;--paper-2:#fffdfa;
      --coral:#ef5d68;--coral-dark:#cf3f52;--mint:#8ad8c5;--gold:#f2bd73;
      --text:#29262d;--muted:#77717b;--line:#ded7d2;--white:#fff;
      --radius:18px;--shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);--container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--text);background:var(--paper);font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(255,255,255,.09)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
    .logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg);flex:none}
    .logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
    .logo strong{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .main-nav a{font-size:14px;color:#c9c4ca;padding:8px 11px;border-radius:9px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
    .btn-primary:hover{background:#ff7078;transform:translateY(-2px);color:#fff}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{border-color:var(--coral);color:#ff9da3}
    .btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;background:transparent;color:#fff;font-size:25px}
    .page-hero{background:var(--ink);color:#fff;padding:72px 0 82px}
    .breadcrumb{font-size:13px;color:#9e97a1;margin-bottom:26px}
    .breadcrumb a:hover{color:var(--coral)}
    .hero-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    h1{font-size:clamp(36px,4.5vw,56px);line-height:1.2;letter-spacing:-.055em;margin:16px 0 21px}
    .hero-copy{color:#c9c4ca;max-width:630px;font-size:17px}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:29px}
    .hero-note{color:#918a94;font-size:13px;margin-top:16px}
    .simulator-window{background:#2b2630;border:1px solid #4a424e;border-radius:24px;padding:17px;box-shadow:0 22px 55px rgba(0,0,0,.24);transform:rotate(1deg)}
    .window-bar{height:30px;display:flex;align-items:center;gap:6px;border-bottom:1px solid #46404a;margin-bottom:16px}
    .window-bar i{width:8px;height:8px;border-radius:50%;background:var(--coral)}
    .window-bar i:nth-child(2){background:var(--gold)}.window-bar i:nth-child(3){background:var(--mint)}
    .screen-content{background:#f4efeb;border-radius:15px;padding:20px;color:var(--text);min-height:270px}
    .screen-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #ddd2ca;padding-bottom:14px}
    .screen-title{font-weight:800;font-size:17px}
    .screen-status{font-size:11px;color:#328e7a;background:#d9f1e9;padding:4px 9px;border-radius:20px}
    .screen-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:12px;margin-top:15px}
    .screen-main,.screen-side{border-radius:12px;padding:18px;background:#fff;border:1px solid #e7ded8}
    .screen-main{min-height:155px;background:linear-gradient(135deg,#332836,#5e3445);color:#fff;display:flex;align-items:end}
    .screen-main b{font-size:22px}.screen-side span{display:block;height:9px;background:#eee5df;border-radius:5px;margin:10px 0}.screen-side span:first-child{background:var(--coral);width:70%}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 10px;font-size:12px;color:var(--muted);background:var(--paper-2)}
    .tag.dark{border-color:#554d59;color:#d8d1d8;background:#332e37}
    .section{padding:88px 0}
    .section.alt{background:var(--paper-2)}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:32px}
    .section-head h2{font-size:31px;line-height:1.25;letter-spacing:-.04em;margin:9px 0 0}
    .section-head p{color:var(--muted);max-width:500px;margin:0}
    .feature-layout{display:grid;grid-template-columns:245px 1fr;gap:22px}
    .feature-index{background:var(--ink);padding:16px;border-radius:var(--radius);align-self:stretch}
    .feature-index a{display:block;color:#aaa3ad;padding:15px;border-radius:12px;border-bottom:1px solid #3c3740;font-size:14px;transition:.2s}
    .feature-index a:first-child,.feature-index a:hover{color:#fff;background:var(--coral)}
    .feature-panel{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow);display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}
    .feature-panel h3{font-size:27px;line-height:1.35;margin:10px 0}
    .feature-panel p{color:var(--muted)}
    .check-list{list-style:none;padding:0;margin:20px 0}
    .check-list li{padding:7px 0 7px 27px;position:relative;font-size:14px}
    .check-list li:before{content:"✓";position:absolute;left:0;color:var(--coral);font-weight:800}
    .interface-card{background:var(--ink-2);border-radius:16px;padding:20px;color:#fff;min-height:260px;position:relative;overflow:hidden}
    .interface-card:before{content:"";position:absolute;width:180px;height:180px;border-radius:50%;background:rgba(239,93,104,.18);right:-45px;top:-50px}
    .interface-card h4{position:relative;font-size:19px;margin:0 0 20px}
    .interface-line{height:11px;border-radius:8px;background:#514955;margin:14px 0;width:80%}
    .interface-line.short{width:53%;background:var(--mint)}.interface-line.coral{width:68%;background:var(--coral)}
    .info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .info-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:24px;box-shadow:var(--shadow-soft)}
    .info-card .number{color:var(--coral);font-size:14px;font-weight:800}
    .info-card h3{font-size:19px;margin:10px 0 6px}
    .info-card p{font-size:14px;color:var(--muted);margin:0}
    .device-section{background:#e9e2dc}
    .device-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:42px;align-items:center}
    .device-visual{background:var(--ink);border-radius:23px;min-height:320px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
    .device-visual:after{content:"PG";font-size:150px;font-weight:900;color:rgba(239,93,104,.15);position:absolute;right:10px;bottom:-40px}
    .tablet{width:64%;border:8px solid #48414c;border-radius:18px;background:#f5f1ed;padding:12px;z-index:1;box-shadow:0 15px 30px #0005}
    .tablet-inner{height:175px;border-radius:8px;background:linear-gradient(135deg,#3b263a,#d65069);display:flex;align-items:end;padding:14px;color:#fff;font-weight:800}
    .device-copy h2{font-size:30px;line-height:1.3;margin:9px 0 15px}.device-copy p{color:var(--muted)}
    .device-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:23px 0}
    .device-list div{background:var(--paper-2);border:1px solid var(--line);border-radius:12px;padding:13px;font-size:14px}.device-list b{display:block;color:var(--text)}.device-list span{font-size:12px;color:var(--muted)}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .step{position:relative;padding-top:12px}.step:not(:last-child):after{content:"";position:absolute;top:26px;right:-14px;width:28px;border-top:1px dashed #c6bbb4}
    .step-no{display:flex;width:32px;height:32px;border-radius:50%;background:var(--coral);color:#fff;align-items:center;justify-content:center;font-size:13px;font-weight:800}
    .step h3{font-size:17px;margin:13px 0 5px}.step p{font-size:14px;color:var(--muted);margin:0}
    .faq-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:45px;align-items:start}
    .faq-intro h2{font-size:30px;line-height:1.3;margin:9px 0 14px}.faq-intro p{color:var(--muted)}
    .faq-list details{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:11px;padding:17px 20px;transition:.2s}
    .faq-list details[open]{border-color:#f2a0a5;box-shadow:var(--shadow-soft)}
    .faq-list summary{cursor:pointer;font-weight:700;list-style:none;padding-right:20px;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:0;color:var(--coral);font-size:20px;top:-3px}.faq-list details[open] summary:after{content:"−"}
    .faq-answer{color:var(--muted);font-size:14px;padding:10px 20px 0 0}
    .cta{background:var(--coral);color:#fff;padding:34px 38px;border-radius:var(--radius);display:flex;justify-content:space-between;align-items:center;gap:20px}
    .cta h2{font-size:27px;margin:0 0 5px}.cta p{margin:0;color:#ffe8e8;font-size:14px}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:30px}.footer-brand p{color:#aaa3ad;font-size:13px;max-width:250px;margin-top:16px}.footer-col h4{font-size:14px;margin:2px 0 13px}.footer-col a{display:block;color:#aaa3ad;font-size:13px;padding:3px 0;transition:.2s}.footer-col a:hover{color:#ff9298}.copyright{border-top:1px solid #38323d;margin-top:40px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#817983;font-size:12px}
    :focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    @media(max-width:1100px){.main-nav a{padding:8px 7px;font-size:13px}.header-inner{gap:15px}.header-actions{display:none}.hero-layout{gap:38px}.footer-grid{grid-template-columns:1.5fr repeat(2,1fr)}}
    @media(max-width:800px){.container{width:min(var(--container),calc(100% - 34px))}.header-inner{height:68px}.menu-toggle{display:block;margin-left:auto}.main-nav{display:none;position:absolute;left:17px;right:17px;top:68px;background:var(--ink-2);padding:12px;border-radius:0 0 15px 15px;flex-direction:column;align-items:stretch;box-shadow:var(--shadow)}.main-nav.open{display:flex}.main-nav a{padding:11px 14px}.hero-layout,.device-layout,.faq-grid{grid-template-columns:1fr}.page-hero{padding:45px 0 58px}.simulator-window{max-width:620px;margin:auto}.feature-layout{grid-template-columns:1fr}.feature-index{display:grid;grid-template-columns:repeat(2,1fr);gap:5px}.feature-index a{padding:11px}.info-grid{grid-template-columns:1fr 1fr}.steps{grid-template-columns:1fr 1fr;gap:28px}.step:not(:last-child):after{display:none}.section{padding:65px 0}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:520px){.container{width:calc(100% - 28px)}h1{font-size:34px}.hero-copy{font-size:15px}.hero-buttons .btn{width:100%}.feature-panel{grid-template-columns:1fr;padding:22px}.section-head{display:block}.section-head p{margin-top:12px}.info-grid,.device-list,.steps{grid-template-columns:1fr}.device-visual{min-height:245px}.tablet{width:75%}.cta{display:block;padding:27px 22px}.cta .btn{width:100%;margin-top:18px}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-top:6px}.screen-grid{grid-template-columns:1fr}.screen-side{display:none}}

/* roulang page: category2 */
:root{
      --ink:#17151b;--ink-2:#242129;--paper:#f5f1ed;--paper-2:#fffdfa;
      --coral:#ef5d68;--coral-dark:#cf3f52;--mint:#8ad8c5;--gold:#f2bd73;
      --text:#29262d;--muted:#77717b;--line:#ded7d2;--white:#fff;
      --radius:18px;--radius-sm:12px;--shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);--container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;color:var(--text);background:var(--paper);font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    :focus-visible{outline:3px solid rgba(138,216,197,.85);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(255,255,255,.09)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
    .logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg);flex:0 0 auto}
    .logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
    .logo strong{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .main-nav a{font-size:14px;color:#c9c4ca;padding:8px 11px;border-radius:9px;transition:.2s ease}
    .main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 18px;font-weight:700;font-size:14px;line-height:1.4;transition:.2s ease;border:1px solid transparent}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
    .btn-primary:hover{background:#ff7078;color:#fff;transform:translateY(-2px)}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{border-color:var(--coral);color:#ffafb3}
    .btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;background:transparent;color:#fff;font-size:25px;line-height:1}
    .page-hero{background:var(--ink);color:#fff;padding:30px 0 70px;overflow:hidden}
    .breadcrumb{display:flex;align-items:center;gap:9px;flex-wrap:wrap;margin:0 0 38px;padding:0;color:#aaa3ad;font-size:13px}
    .breadcrumb a{transition:.2s}
    .breadcrumb a:hover{color:var(--mint)}
    .breadcrumb span{color:#655f69}
    .page-hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
    .eyebrow,.section-kicker{display:block;color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(34px,4.1vw,50px);line-height:1.2;letter-spacing:-.055em;margin:16px 0 19px}
    .hero-lead{max-width:550px;color:#cac3cc;font-size:17px;line-height:1.9}
    .hero-buttons{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
    .hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:23px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 10px;font-size:12px;color:var(--muted);background:var(--paper-2)}
    .tag.dark{border-color:#554d59;color:#d8d1d8;background:#2c2830}
    .tag.mint{border-color:rgba(138,216,197,.38);color:var(--mint);background:rgba(138,216,197,.08)}
    .interface-card{position:relative;background:#2a2630;border:1px solid #4a434e;border-radius:24px;padding:16px;box-shadow:0 28px 55px rgba(0,0,0,.28)}
    .interface-top{display:flex;align-items:center;gap:7px;padding:0 3px 13px}
    .dot{width:9px;height:9px;border-radius:50%;background:#615a65}.dot:first-child{background:var(--coral)}.dot:nth-child(2){background:var(--gold)}
    .interface-name{margin-left:auto;color:#aaa3ad;font-size:12px}
    .interface-body{display:grid;grid-template-columns:137px 1fr;min-height:293px;border-radius:15px;overflow:hidden;background:#f0ebe6}
    .interface-menu{padding:20px 13px;background:#201d24}
    .interface-menu b{display:block;color:#fff;font-size:14px;margin-bottom:19px}
    .menu-line{height:10px;border-radius:99px;background:#48424c;margin:14px 0}
    .menu-line.active{width:88%;background:var(--coral)}
    .interface-main{padding:22px}
    .mini-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:17px}
    .mini-head strong{font-size:15px;color:var(--ink)}
    .status{font-size:11px;font-weight:700;color:#196a59;background:rgba(138,216,197,.54);padding:3px 8px;border-radius:99px}
    .interface-panels{display:grid;grid-template-columns:1.2fr .8fr;gap:13px}
    .panel-display{min-height:179px;border-radius:13px;background:linear-gradient(145deg,#403342,#7b4659);padding:16px;position:relative;overflow:hidden}
    .panel-display:before{content:"";position:absolute;width:130px;height:130px;border-radius:50%;right:-38px;bottom:-40px;background:rgba(138,216,197,.29)}
    .panel-display small{position:relative;color:#efdae0;font-size:11px}.panel-display b{position:relative;display:block;color:#fff;font-size:22px;line-height:1.25;margin-top:15px}
    .panel-bars{position:absolute;left:16px;bottom:18px;display:flex;gap:5px;align-items:end;height:41px}
    .panel-bars i{display:block;width:8px;border-radius:8px;background:var(--mint)}.panel-bars i:nth-child(1){height:20px}.panel-bars i:nth-child(2){height:33px}.panel-bars i:nth-child(3){height:26px}.panel-bars i:nth-child(4){height:40px}
    .quick-stack{display:grid;gap:13px}
    .quick-block{background:#fff;border:1px solid #ddd5d0;border-radius:13px;padding:14px}
    .quick-block span{display:block;color:var(--muted);font-size:11px}.quick-block b{display:block;font-size:15px;margin-top:4px}
    .section{padding:88px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:34px}
    .section-head h2{font-size:clamp(26px,3vw,33px);line-height:1.28;letter-spacing:-.045em;margin:8px 0 0}
    .section-head p{max-width:500px;color:var(--muted);margin-bottom:0}
    .overview-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:26px}
    .screen-board{min-height:440px;border-radius:var(--radius);background:var(--ink-2);padding:28px;position:relative;overflow:hidden;color:#fff;box-shadow:var(--shadow)}
    .screen-board:after{content:"";position:absolute;width:330px;height:330px;border:1px solid rgba(138,216,197,.18);border-radius:50%;right:-100px;top:-125px}
    .board-top{display:flex;justify-content:space-between;align-items:center;position:relative;z-index:1}
    .board-top b{font-size:15px}.board-top span{color:var(--mint);font-size:12px}
    .board-frame{position:relative;z-index:1;margin-top:24px;padding:19px;background:#faf6f1;border-radius:15px;color:var(--text)}
    .board-nav{display:flex;gap:7px;border-bottom:1px solid #dfd7d2;padding-bottom:13px}
    .board-nav i{width:29px;height:7px;border-radius:99px;background:#d9d0cc}.board-nav i:first-child{width:53px;background:var(--coral)}
    .board-content{display:grid;grid-template-columns:1fr 165px;gap:15px;padding-top:16px}
    .board-banner{min-height:203px;border-radius:12px;padding:20px;background:linear-gradient(120deg,#e95d68,#855167);color:#fff;position:relative;overflow:hidden}
    .board-banner:after{content:"";position:absolute;width:150px;height:150px;border:18px solid rgba(255,255,255,.19);border-radius:50%;right:-48px;bottom:-52px}
    .board-banner small{opacity:.85}.board-banner b{position:relative;z-index:1;display:block;font-size:25px;line-height:1.25;margin-top:22px}
    .board-side{display:grid;gap:11px}.board-side div{border:1px solid #e1d8d3;border-radius:11px;padding:13px;background:#fff;font-size:12px}.board-side b{display:block;font-size:15px;margin-top:3px}
    .board-foot{display:flex;gap:8px;flex-wrap:wrap;margin-top:15px}
    .board-foot span{font-size:11px;background:#37313b;color:#dad3db;border-radius:99px;padding:4px 9px}
    .info-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--paper-2);padding:33px;box-shadow:var(--shadow-soft)}
    .info-panel h3{font-size:25px;line-height:1.35;margin-bottom:11px}
    .info-panel>p{color:var(--muted);font-size:15px}
    .detail-list{margin:24px 0 0;padding:0;list-style:none;border-top:1px solid var(--line)}
    .detail-list li{display:grid;grid-template-columns:38px 1fr;gap:13px;padding:17px 0;border-bottom:1px solid var(--line)}
    .detail-list i{height:29px;width:29px;display:grid;place-items:center;background:#f9d7da;color:var(--coral-dark);font-style:normal;font-size:13px;font-weight:800;border-radius:9px}
    .detail-list b{display:block;font-size:15px;margin-bottom:2px}.detail-list span{display:block;color:var(--muted);font-size:13px;line-height:1.65}
    .notice-section{padding:0 0 88px}
    .notice-band{display:grid;grid-template-columns:190px 1fr auto;gap:25px;align-items:center;background:#e5ddd7;border:1px solid #d8cec7;padding:24px 29px;border-radius:var(--radius)}
    .notice-icon{width:62px;height:62px;border-radius:18px;background:var(--mint);display:grid;place-items:center;font-size:28px;color:#205c50}
    .notice-band h3{font-size:19px;margin-bottom:3px}.notice-band p{margin:0;color:#645e66;font-size:14px}
    .function-section{background:var(--paper-2)}
    .function-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .function-card{border:1px solid var(--line);border-radius:var(--radius-sm);padding:23px;background:#fff;min-height:210px;transition:.2s ease}
    .function-card:hover{border-color:#efa4aa;transform:translateY(-4px);box-shadow:var(--shadow-soft)}
    .function-no{display:inline-grid;place-items:center;width:31px;height:31px;border-radius:9px;background:#f9d8db;color:var(--coral-dark);font-size:12px;font-weight:800}
    .function-card h3{font-size:17px;margin:18px 0 7px}.function-card p{font-size:13px;color:var(--muted);line-height:1.72;margin:0}
    .steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper-2);overflow:hidden}
    .step{padding:29px 25px;position:relative;min-height:220px}
    .step:not(:last-child){border-right:1px solid var(--line)}
    .step-num{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--coral);color:#fff;font-size:13px;font-weight:800}
    .step h3{font-size:17px;margin:18px 0 7px}.step p{font-size:13px;color:var(--muted);line-height:1.7;margin:0}
    .step-arrow{position:absolute;right:-11px;top:35px;width:21px;height:21px;border-top:1px solid var(--coral);border-right:1px solid var(--coral);transform:rotate(45deg);z-index:1;background:var(--paper-2)}
    .faq-layout{display:grid;grid-template-columns:280px 1fr;gap:45px;align-items:start}
    .faq-intro{background:var(--ink);border-radius:var(--radius);padding:30px;color:#fff}
    .faq-intro h2{font-size:28px;line-height:1.3;margin:10px 0}.faq-intro p{color:#bbb4bd;font-size:14px;margin-bottom:21px}
    .faq-list{display:grid;gap:11px}
    .faq-item{background:var(--paper-2);border:1px solid var(--line);border-radius:13px;overflow:hidden}
    .faq-item summary{list-style:none;cursor:pointer;font-weight:800;font-size:16px;padding:18px 50px 18px 20px;position:relative}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";position:absolute;right:19px;top:13px;font-size:23px;color:var(--coral);font-weight:400;transition:.2s}
    .faq-item[open] summary{color:var(--coral-dark);border-bottom:1px solid var(--line)}
    .faq-item[open] summary:after{content:"−";transform:rotate(180deg)}
    .faq-answer{padding:16px 20px 20px;color:var(--muted);font-size:14px;line-height:1.85}
    .cta-section{padding:0 0 88px}
    .cta-box{background:linear-gradient(120deg,#2b2630 0%,#3b2935 100%);border-radius:var(--radius);padding:47px;display:flex;justify-content:space-between;align-items:center;gap:28px;color:#fff;position:relative;overflow:hidden}
    .cta-box:after{content:"";width:280px;height:280px;border-radius:50%;border:35px solid rgba(138,216,197,.11);position:absolute;right:-88px;top:-145px}
    .cta-box h2{font-size:30px;line-height:1.3;margin:8px 0}.cta-box p{color:#c7bec8;margin:0;max-width:610px;font-size:15px}
    .cta-actions{display:flex;gap:10px;flex:none;position:relative;z-index:1}
    .site-footer{background:var(--ink);color:#c9c4ca;padding:60px 0 22px}
    .footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:28px}
    .footer-brand .logo{color:#fff;margin-bottom:15px}.footer-brand p{font-size:13px;line-height:1.8;max-width:280px;margin:0}
    .footer-col h4{color:#fff;font-size:14px;margin:4px 0 15px}.footer-col a{display:block;color:#aaa3ad;font-size:13px;margin:8px 0;transition:.2s}
    .footer-col a:hover{color:var(--mint);padding-left:3px}
    .copyright{margin-top:42px;padding-top:20px;border-top:1px solid #38323b;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;color:#89818b;font-size:12px}
    @media (max-width:1100px){
      .main-nav{gap:1px}.main-nav a{padding:8px 7px;font-size:13px}.header-actions .btn-dark{display:none}
      .function-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:2fr repeat(2,1fr)}
    }
    @media (max-width:850px){
      .header-inner{height:70px}.main-nav{display:none}.menu-toggle{display:block;margin-left:auto}.header-actions{margin-left:0}
      .header-actions .btn{padding:9px 13px}.page-hero-grid,.overview-grid,.faq-layout{grid-template-columns:1fr;gap:28px}
      .page-hero{padding-bottom:55px}.interface-card{max-width:650px;margin:auto}.notice-band{grid-template-columns:65px 1fr}.notice-band .btn{grid-column:2}
      .steps-grid{grid-template-columns:repeat(2,1fr)}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}
      .step-arrow{display:none}.faq-intro{display:flex;align-items:center;gap:24px}.faq-intro h2{margin:0}.faq-intro p{margin:0}
      .cta-box{display:block}.cta-actions{margin-top:25px}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}
    }
    @media (max-width:576px){
      body{font-size:15px}.container{width:min(var(--container),calc(100% - 32px))}.header-inner{gap:10px}.logo strong{font-size:15px}.logo-mark{width:29px;height:29px}
      .header-actions .btn{font-size:12px;padding:9px 10px}.page-hero{padding-top:22px}.breadcrumb{margin-bottom:27px}.hero-lead{font-size:15px}
      .hero-buttons,.cta-actions{flex-direction:column}.hero-buttons .btn,.cta-actions .btn{width:100%}.interface-body{grid-template-columns:92px 1fr}.interface-menu{padding:15px 9px}.interface-menu b{font-size:12px}.interface-main{padding:14px}.interface-panels{grid-template-columns:1fr}.quick-stack{grid-template-columns:1fr 1fr}.panel-display{min-height:137px}
      .section{padding:64px 0}.section-head{display:block;margin-bottom:25px}.section-head p{margin-top:12px}.screen-board{min-height:auto;padding:18px}.board-content{grid-template-columns:1fr}.board-side{grid-template-columns:repeat(2,1fr)}
      .info-panel{padding:24px}.notice-section{padding-bottom:64px}.notice-band{grid-template-columns:1fr;padding:23px}.notice-band .btn{grid-column:auto;width:100%}
      .function-grid,.steps-grid{grid-template-columns:1fr}.function-card{min-height:auto}.step{min-height:auto;border-right:0!important;border-bottom:1px solid var(--line)}.step:last-child{border-bottom:0}
      .faq-intro{display:block;padding:25px}.faq-intro p{margin-top:12px}.cta-section{padding-bottom:64px}.cta-box{padding:30px 24px}.cta-box h2{font-size:25px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}.copyright{margin-top:30px;display:block}.copyright span{display:block;margin:5px 0}
    }

/* roulang page: category4 */
:root{
      --ink:#17151b;
      --ink-2:#242129;
      --paper:#f5f1ed;
      --paper-2:#fffdfa;
      --coral:#ef5d68;
      --coral-dark:#cf3f52;
      --mint:#8ad8c5;
      --gold:#f2bd73;
      --text:#29262d;
      --muted:#77717b;
      --line:#ded7d2;
      --white:#fff;
      --radius:18px;
      --shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    button{font:inherit;border:0;cursor:pointer}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:var(--ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.09)}
    .header-inner{height:76px;display:flex;align-items:center;gap:24px}
    .logo{display:flex;align-items:center;gap:11px;white-space:nowrap;font-weight:800;letter-spacing:-.03em}
    .logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg);flex:none}
    .logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
    .logo strong{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
    .main-nav a{padding:8px 10px;border-radius:9px;color:#c9c4ca;font-size:14px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:8px;margin-left:8px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:11px;border:1px solid transparent;font-size:14px;font-weight:700;transition:.2s}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
    .btn-primary:hover{background:#ff7078;transform:translateY(-2px)}
    .btn-dark{background:transparent;color:#fff;border-color:#56505a}
    .btn-dark:hover{border-color:var(--coral);color:#ff9da3}
    .btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;background:transparent;color:#fff;font-size:25px;padding:5px}
    .crumb-wrap{background:var(--paper-2);border-bottom:1px solid var(--line)}
    .breadcrumbs{padding:18px 0;font-size:13px;color:var(--muted)}
    .breadcrumbs a:hover{color:var(--coral-dark)}
    .breadcrumbs span{margin:0 8px;color:#b1a8a7}
    .page-hero{padding:70px 0 72px;background:var(--ink-2);color:#fff;overflow:hidden}
    .page-hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    .page-hero h1{font-size:clamp(35px,4.5vw,54px);line-height:1.2;letter-spacing:-.055em;margin:16px 0 20px;max-width:600px}
    .page-hero h1 em{font-style:normal;color:#ff8a8d}
    .hero-lead{max-width:590px;color:#c9c4ca;font-size:17px;line-height:1.9}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .topic-cloud{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 11px;font-size:12px;color:var(--muted);background:var(--paper-2)}
    .tag.dark{border-color:#554d59;color:#d8d1d8;background:#332e37}
    .brand-visual{min-height:310px;position:relative;border:1px solid #4d4651;border-radius:26px;background:#1c1920;padding:25px;box-shadow:0 22px 55px rgba(0,0,0,.24)}
    .brand-visual:before{content:"PG";position:absolute;right:-22px;top:-48px;color:rgba(239,93,104,.12);font-weight:900;font-size:190px;line-height:1}
    .visual-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #413a45;padding-bottom:15px;position:relative;z-index:1}
    .visual-top b{font-size:18px}
    .status{display:inline-flex;align-items:center;gap:6px;color:var(--mint);font-size:12px}
    .status:before{content:"";width:7px;height:7px;background:var(--mint);border-radius:50%}
    .visual-body{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
    .visual-card{min-height:95px;border:1px solid #49414d;border-radius:13px;padding:16px;background:#28232d}
    .visual-card strong{display:block;color:#fff;font-size:16px;margin-bottom:7px}
    .visual-card small{color:#9f97a1;font-size:12px}
    .visual-card.highlight{background:rgba(239,93,104,.16);border-color:rgba(239,93,104,.6)}
    .section{padding:88px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:30px}
    .section-head h2{font-size:31px;line-height:1.28;letter-spacing:-.04em;margin:9px 0 0}
    .section-head p{max-width:500px;color:var(--muted);margin:0}
    .brand-band{background:var(--ink);color:#fff;border-radius:var(--radius);padding:40px;display:grid;grid-template-columns:1fr 1.15fr;gap:40px;align-items:center;box-shadow:var(--shadow)}
    .brand-band h2{font-size:30px;line-height:1.35;margin:10px 0 14px}
    .brand-band p{color:#beb7c0;margin:0}
    .brand-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .brand-chip{min-height:112px;padding:17px;border:1px solid #4b444f;border-radius:13px;color:#d7d0d7;background:#2b2630;transition:.2s}
    .brand-chip:hover{border-color:var(--coral);transform:translateY(-2px)}
    .brand-chip b{display:block;color:var(--mint);font-size:13px;margin-bottom:5px}
    .brand-chip span{font-size:13px;color:#ddd6dd}
    .update-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:22px}
    .update-track,.index-panel{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:30px}
    .update-item{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
    .update-item:first-child{padding-top:0}
    .update-item:last-child{border-bottom:0;padding-bottom:0}
    .update-date{color:var(--coral-dark);font-size:13px;font-weight:800}
    .update-item h3{font-size:18px;margin:0 0 5px;line-height:1.45}
    .update-item p{margin:0;color:var(--muted);font-size:14px}
    .index-panel{background:#e9e2dc}
    .index-panel h3{margin:0 0 18px;font-size:21px}
    .index-list{display:grid;gap:10px}
    .index-list a{display:flex;align-items:center;justify-content:space-between;gap:15px;background:#fffaf7;border:1px solid #e2d8d0;border-radius:12px;padding:14px 16px;font-size:14px;transition:.2s}
    .index-list a:hover{border-color:var(--coral);color:var(--coral-dark);transform:translateX(3px)}
    .index-list i{font-style:normal;color:var(--coral);font-size:18px}
    .info-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .info-item{background:var(--paper-2);padding:22px 20px}
    .info-item b{display:block;font-size:15px;margin-bottom:3px}
    .info-item span{color:var(--muted);font-size:13px}
    .faq-list{max-width:900px;margin:0 auto}
    .faq-list details{background:var(--paper-2);border:1px solid var(--line);border-radius:13px;margin-bottom:11px;padding:0 21px;transition:.2s}
    .faq-list details[open]{border-color:#efa0a5;box-shadow:var(--shadow-soft)}
    .faq-list summary{cursor:pointer;list-style:none;padding:18px 28px 18px 0;font-weight:700;position:relative}
    .faq-list summary::-webkit-details-marker{display:none}
    .faq-list summary:after{content:"+";position:absolute;right:0;top:15px;color:var(--coral);font-size:23px;font-weight:400}
    .faq-list details[open] summary:after{content:"−"}
    .faq-answer{color:var(--muted);font-size:14px;padding:0 0 19px;max-width:780px}
    .cta{background:var(--coral);color:#fff;padding:38px 42px;border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta h2{margin:0 0 7px;font-size:27px;line-height:1.35}
    .cta p{margin:0;color:#ffe8e9;font-size:14px}
    .cta .btn{background:#fff;color:var(--ink)}
    .cta .btn:hover{background:#fff4f2}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:30px}
    .footer-brand p{color:#aaa3ad;font-size:13px;max-width:260px;margin:16px 0 0}
    .footer-col{display:flex;flex-direction:column;gap:8px}
    .footer-col h4{font-size:14px;margin:2px 0 9px;color:#fff}
    .footer-col a{font-size:13px;color:#aaa3ad;transition:.2s}
    .footer-col a:hover{color:#ff8a8d}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #39333d;margin-top:42px;padding-top:19px;color:#817a84;font-size:12px}
    :focus-visible{outline:3px solid rgba(138,216,197,.8);outline-offset:3px}
    @media(max-width:1100px){
      .main-nav{gap:0}.main-nav a{padding-left:7px;padding-right:7px;font-size:13px}
      .header-actions{display:none}
      .page-hero-grid{gap:35px}
      .footer-grid{grid-template-columns:1.4fr repeat(4,1fr);gap:18px}
    }
    @media(max-width:820px){
      .container{width:min(var(--container),calc(100% - 34px))}
      .header-inner{height:68px}
      .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--ink);padding:12px 17px 18px;flex-direction:column;align-items:stretch;border-top:1px solid #39333d}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 14px;border-bottom:1px solid #39333d}
      .menu-toggle{display:block;margin-left:auto}
      .page-hero{padding:54px 0}
      .page-hero-grid,.update-layout,.brand-band{grid-template-columns:1fr}
      .brand-visual{min-height:270px}
      .section{padding:65px 0}
      .section-head{display:block}
      .section-head p{margin-top:12px}
      .info-strip{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }
    @media(max-width:520px){
      .container{width:calc(100% - 28px)}
      .logo strong{font-size:15px}
      .page-hero h1{font-size:34px}
      .hero-lead{font-size:15px}
      .hero-buttons .btn{width:100%}
      .brand-band{padding:25px 20px}
      .brand-band h2{font-size:25px}
      .brand-list{grid-template-columns:1fr}
      .brand-chip{min-height:auto}
      .update-track,.index-panel{padding:21px}
      .update-item{grid-template-columns:1fr;gap:5px}
      .info-strip{grid-template-columns:1fr}
      .cta{display:block;padding:28px 23px}
      .cta .btn{width:100%;margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 15px}
      .copyright{display:block;line-height:2}
      .copyright span{display:block}
    }

/* roulang page: category3 */
:root{
      --ink:#17151b;
      --ink-2:#242129;
      --paper:#f5f1ed;
      --paper-2:#fffdfa;
      --coral:#ef5d68;
      --coral-dark:#cf3f52;
      --mint:#8ad8c5;
      --gold:#f2bd73;
      --text:#29262d;
      --muted:#77717b;
      --line:#ded7d2;
      --white:#fff;
      --radius:18px;
      --shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      background:var(--paper);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
      font-size:16px;
      line-height:1.8;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    :focus-visible{outline:3px solid rgba(239,93,104,.48);outline-offset:3px}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:30;
      color:#fff;
      background:var(--ink);
      border-bottom:1px solid rgba(255,255,255,.1);
    }
    .header-inner{height:76px;display:flex;align-items:center;gap:26px}
    .logo{display:flex;align-items:center;gap:11px;white-space:nowrap}
    .logo strong{font-size:17px;letter-spacing:-.03em}
    .logo-mark{
      width:33px;height:33px;display:block;position:relative;
      border-radius:10px 10px 10px 3px;
      background:var(--coral);
      transform:rotate(-8deg);
    }
    .logo-mark:after{
      content:"";position:absolute;right:6px;top:6px;
      width:10px;height:10px;border-radius:50%;background:var(--mint);
    }
    .main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
    .main-nav a{
      padding:8px 10px;
      border-radius:9px;
      color:#c9c4ca;
      font-size:14px;
      transition:.2s ease;
    }
    .main-nav a:hover,.main-nav a.active{
      color:#fff;
      background:rgba(239,93,104,.16);
    }
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:8px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:44px;
      padding:10px 18px;
      border:1px solid transparent;
      border-radius:11px;
      font-size:14px;
      font-weight:700;
      transition:.2s ease;
    }
    .btn-primary{
      color:#fff;
      background:var(--coral);
      box-shadow:0 7px 20px rgba(239,93,104,.2);
    }
    .btn-primary:hover{color:#fff;background:#ff7078;transform:translateY(-2px)}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{color:#ff9da3;border-color:var(--coral)}
    .btn-light{color:var(--ink);background:#fff;border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;color:#fff;background:transparent;font-size:25px;line-height:1}
    
    .page-hero{
      position:relative;
      overflow:hidden;
      color:#fff;
      padding:44px 0 82px;
      background:
        radial-gradient(circle at 84% 28%,rgba(239,93,104,.18),transparent 27%),
        radial-gradient(circle at 12% 90%,rgba(138,216,197,.08),transparent 24%),
        var(--ink);
    }
    .page-hero:after{
      content:"";
      position:absolute;
      width:420px;height:420px;
      right:-180px;bottom:-270px;
      border:1px solid rgba(255,255,255,.1);
      border-radius:50%;
      box-shadow:0 0 0 34px rgba(255,255,255,.025),0 0 0 68px rgba(255,255,255,.02);
    }
    .breadcrumb{
      display:flex;align-items:center;gap:9px;
      margin-bottom:48px;
      color:#938c97;
      font-size:13px;
    }
    .breadcrumb a:hover{color:#fff}
    .breadcrumb span{color:#5e5762}
    .hero-copy{max-width:800px;position:relative;z-index:1}
    .eyebrow,.section-kicker{
      color:var(--coral);
      font-size:12px;
      font-weight:800;
      letter-spacing:.12em;
    }
    .hero-copy h1{
      max-width:820px;
      margin:15px 0 19px;
      color:#fff;
      font-size:clamp(36px,5vw,58px);
      line-height:1.2;
      letter-spacing:-.06em;
    }
    .hero-copy h1 em{font-style:normal;color:#ff8a8d}
    .hero-copy p{
      max-width:710px;
      margin:0;
      color:#c9c4ca;
      font-size:17px;
      line-height:1.9;
    }
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:29px}
    .hero-aside{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
      max-width:820px;
      margin-top:48px;
      position:relative;z-index:1;
    }
    .hero-stat{
      padding:17px 18px;
      border:1px solid #3c3741;
      border-radius:13px;
      background:rgba(255,255,255,.045);
    }
    .hero-stat b{display:block;color:#fff;font-size:14px}
    .hero-stat span{display:block;color:#968f99;font-size:12px;margin-top:3px}
    
    .section{padding:88px 0}
    .section-alt{background:#e9e2dc}
    .section-light{background:var(--paper-2)}
    .section-head{
      display:flex;align-items:end;justify-content:space-between;
      gap:25px;margin-bottom:32px;
    }
    .section-head h2{
      margin:9px 0 0;
      color:var(--ink);
      font-size:clamp(25px,3vw,34px);
      line-height:1.3;
      letter-spacing:-.045em;
    }
    .section-head p{max-width:500px;margin:0;color:var(--muted);font-size:15px}
    
    .entry-layout{
      display:grid;
      grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);
      gap:22px;
      align-items:stretch;
    }
    .entry-panel{
      position:relative;
      min-height:360px;
      overflow:hidden;
      padding:38px;
      color:#fff;
      border-radius:var(--radius);
      background:var(--ink-2);
      box-shadow:var(--shadow);
    }
    .entry-panel:before{
      content:"";
      position:absolute;
      width:310px;height:310px;
      top:-150px;right:-80px;
      border:1px solid rgba(239,93,104,.35);
      border-radius:50%;
      box-shadow:0 0 0 25px rgba(239,93,104,.04),0 0 0 60px rgba(239,93,104,.025);
    }
    .entry-panel > *{position:relative;z-index:1}
    .entry-label{
      display:inline-flex;align-items:center;gap:8px;
      padding:6px 11px;
      color:#ffd1d4;
      border:1px solid rgba(239,93,104,.38);
      border-radius:99px;
      background:rgba(239,93,104,.12);
      font-size:12px;
    }
    .entry-label i{width:7px;height:7px;border-radius:50%;background:var(--mint);display:inline-block}
    .entry-panel h2{max-width:590px;margin:25px 0 13px;font-size:31px;line-height:1.32;letter-spacing:-.04em}
    .entry-panel p{max-width:590px;margin:0;color:#bcb5bf;font-size:15px}
    .entry-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .entry-steps{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:36px;
      padding-top:22px;
      border-top:1px solid #443d48;
    }
    .entry-steps b{display:block;color:var(--mint);font-size:13px}
    .entry-steps span{display:block;color:#ddd6dd;font-size:13px;margin-top:3px}
    .check-card{
      padding:30px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:var(--paper-2);
      box-shadow:var(--shadow-soft);
    }
    .check-card h3{margin:0;color:var(--ink);font-size:21px;line-height:1.35}
    .check-card > p{margin:10px 0 20px;color:var(--muted);font-size:14px}
    .check-list{list-style:none;margin:0;padding:0}
    .check-list li{
      display:flex;gap:12px;align-items:flex-start;
      padding:14px 0;
      border-top:1px solid var(--line);
      color:var(--text);
      font-size:14px;
    }
    .check-list li:before{
      content:"✓";
      flex:0 0 22px;
      width:22px;height:22px;
      color:var(--coral);
      border-radius:50%;
      background:#fff0ef;
      text-align:center;
      font-weight:800;
      line-height:22px;
    }
    
    .notice-strip{
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      gap:0;
      margin-top:22px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:var(--paper-2);
      overflow:hidden;
    }
    .notice-item{padding:23px 25px;border-right:1px solid var(--line)}
    .notice-item:last-child{border-right:0}
    .notice-item b{display:block;color:var(--ink);font-size:15px}
    .notice-item span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    
    .process-grid{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:0;
      position:relative;
    }
    .process-grid:before{
      content:"";
      position:absolute;
      left:8%;right:8%;top:22px;
      border-top:1px dashed #c8beb7;
    }
    .process-item{position:relative;padding:0 18px 0 0}
    .process-number{
      display:flex;align-items:center;justify-content:center;
      width:45px;height:45px;
      color:#fff;
      border-radius:14px;
      background:var(--coral);
      font-weight:800;
      box-shadow:0 6px 15px rgba(239,93,104,.2);
    }
    .process-item h3{margin:19px 0 7px;color:var(--ink);font-size:17px}
    .process-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.7;max-width:220px}
    
    .mobile-layout{
      display:grid;
      grid-template-columns:.8fr 1.2fr;
      gap:24px;
      align-items:stretch;
    }
    .visual-card{
      position:relative;
      min-height:340px;
      overflow:hidden;
      padding:26px;
      border-radius:var(--radius);
      background:var(--ink);
    }
    .visual-card:after{
      content:"";
      position:absolute;
      width:230px;height:230px;
      right:-75px;bottom:-100px;
      border:1px solid rgba(138,216,197,.35);
      border-radius:50%;
      box-shadow:0 0 0 25px rgba(138,216,197,.04);
    }
    .visual-top{display:flex;align-items:center;justify-content:space-between;color:#aaa3ad;font-size:12px}
    .signal{display:flex;gap:4px;align-items:end}
    .signal i{display:block;width:4px;background:var(--mint);border-radius:4px}
    .signal i:nth-child(1){height:6px}.signal i:nth-child(2){height:10px}.signal i:nth-child(3){height:14px}.signal i:nth-child(4){height:18px}
    .device-screen{
      width:min(210px,70%);
      height:245px;
      margin:29px auto 0;
      padding:12px;
      border:5px solid #554d59;
      border-radius:25px;
      background:#2b2630;
      box-shadow:0 18px 35px rgba(0,0,0,.3);
    }
    .screen-inner{
      height:100%;
      padding:18px 12px;
      border-radius:14px;
      background:
        linear-gradient(145deg,rgba(239,93,104,.7),rgba(87,49,67,.55)),
        #402c3b;
    }
    .screen-bar{height:9px;width:62%;border-radius:99px;background:#f5c0a5;margin-bottom:20px}
    .screen-tile{height:58px;margin:9px 0;border-radius:9px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.18)}
    .screen-button{width:68%;height:27px;margin:15px auto 0;border-radius:8px;background:var(--mint)}
    .mobile-info{
      padding:35px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:var(--paper-2);
    }
    .mobile-info h2{margin:0 0 10px;color:var(--ink);font-size:28px;line-height:1.35}
    .mobile-info > p{margin:0 0 22px;color:var(--muted);font-size:15px}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
    .tag{
      display:inline-flex;align-items:center;
      padding:5px 11px;
      color:var(--muted);
      border:1px solid var(--line);
      border-radius:99px;
      background:#fff;
      font-size:12px;
    }
    .tag.mint{color:#32796e;border-color:#b7e8dc;background:#effbf8}
    .info-lines{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-bottom:25px}
    .info-line{padding:13px 15px;border-radius:11px;background:#f2ece7}
    .info-line b{display:block;color:var(--ink);font-size:13px}
    .info-line span{display:block;color:var(--muted);font-size:12px;margin-top:2px}
    
    .faq-wrap{max-width:860px;margin:0 auto}
    .faq-item{border-top:1px solid var(--line)}
    .faq-item:last-child{border-bottom:1px solid var(--line)}
    .faq-question{
      display:flex;align-items:center;justify-content:space-between;
      width:100%;padding:21px 4px;
      color:var(--ink);background:transparent;
      text-align:left;font-size:16px;font-weight:700;
    }
    .faq-question span:last-child{
      display:flex;align-items:center;justify-content:center;
      width:28px;height:28px;
      color:var(--coral);
      border:1px solid #f3c4c5;
      border-radius:50%;
      font-size:20px;font-weight:400;
      line-height:1;
      transition:.2s ease;
    }
    .faq-answer{display:none;padding:0 45px 20px 4px;color:var(--muted);font-size:14px;line-height:1.85}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span:last-child{color:#fff;background:var(--coral);transform:rotate(45deg)}
    
    .cta{
      padding:48px 54px;
      color:#fff;
      border-radius:var(--radius);
      background:var(--ink-2);
      box-shadow:var(--shadow);
      display:flex;align-items:center;justify-content:space-between;gap:28px;
    }
    .cta h2{margin:0 0 8px;font-size:27px;line-height:1.35}
    .cta p{margin:0;color:#beb7c0;font-size:14px}
    .cta-actions{display:flex;gap:10px;flex-wrap:wrap;flex-shrink:0}
    
    .site-footer{padding:58px 0 24px;color:#bcb5bf;background:var(--ink)}
    .footer-grid{display:grid;grid-template-columns:1.65fr repeat(4,1fr);gap:30px}
    .footer-brand .logo{color:#fff}
    .footer-brand p{max-width:270px;margin:18px 0 0;color:#8f8992;font-size:13px;line-height:1.8}
    .footer-col{display:flex;flex-direction:column;gap:8px}
    .footer-col h4{margin:2px 0 9px;color:#fff;font-size:14px}
    .footer-col a{color:#938c97;font-size:13px;transition:.2s ease}
    .footer-col a:hover{color:#ff9da3}
    .copyright{
      display:flex;justify-content:space-between;gap:20px;
      margin-top:42px;padding-top:18px;
      border-top:1px solid #39333e;
      color:#746d78;font-size:12px;
    }
    
    @media (max-width:1100px){
      .main-nav a{padding-left:7px;padding-right:7px;font-size:13px}
      .header-actions{display:none}
      .entry-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}
      .footer-grid .footer-col:last-child{display:none}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 36px))}
      .header-inner{height:68px}
      .main-nav{
        display:none;
        position:absolute;
        top:68px;left:0;right:0;
        padding:12px 18px 18px;
        flex-direction:column;
        align-items:stretch;
        background:var(--ink);
        border-top:1px solid #39333e;
        box-shadow:0 18px 25px rgba(0,0,0,.2);
      }
      .main-nav.show{display:flex}
      .main-nav a{padding:12px 13px;border-radius:8px;border-bottom:1px solid #302b35}
      .menu-toggle{display:block;margin-left:auto}
      .page-hero{padding:31px 0 58px}
      .breadcrumb{margin-bottom:33px}
      .hero-copy h1{font-size:36px}
      .hero-copy p{font-size:15px}
      .hero-aside{grid-template-columns:1fr 1fr;margin-top:36px}
      .hero-stat:last-child{grid-column:span 2}
      .section{padding:63px 0}
      .section-head{display:block;margin-bottom:25px}
      .section-head p{margin-top:12px}
      .entry-panel{min-height:0;padding:28px 24px}
      .entry-panel h2{font-size:26px}
      .entry-steps{grid-template-columns:1fr;gap:11px}
      .entry-steps div{display:flex;gap:9px;align-items:center}
      .notice-strip{grid-template-columns:1fr}
      .notice-item{border-right:0;border-bottom:1px solid var(--line)}
      .notice-item:last-child{border-bottom:0}
      .process-grid{grid-template-columns:1fr 1fr;gap:33px 15px}
      .process-grid:before{display:none}
      .mobile-layout{grid-template-columns:1fr}
      .visual-card{min-height:300px}
      .mobile-info{padding:27px 23px}
      .cta{display:block;padding:34px 25px}
      .cta-actions{margin-top:23px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:29px 20px}
      .footer-brand{grid-column:span 2}
      .copyright{display:block;line-height:2}
      .copyright span{display:block}
    }
    @media (max-width:520px){
      .container{width:calc(100% - 30px)}
      .logo strong{font-size:15px}
      .hero-copy h1{font-size:31px}
      .hero-actions .btn{width:100%}
      .hero-aside{grid-template-columns:1fr}
      .hero-stat:last-child{grid-column:auto}
      .entry-actions .btn{width:100%}
      .process-grid{grid-template-columns:1fr}
      .process-item{padding:0}
      .info-lines{grid-template-columns:1fr}
      .cta-actions .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
      .footer-grid .footer-col:last-child{display:flex}
    }

/* roulang page: category5 */
:root{
      --ink:#17151b;--ink-2:#242129;--paper:#f5f1ed;--paper-2:#fffdfa;
      --coral:#ef5d68;--coral-dark:#cf3f52;--mint:#8ad8c5;--gold:#f2bd73;
      --text:#29262d;--muted:#77717b;--line:#ded7d2;--white:#fff;
      --radius:18px;--shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);--container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{background:var(--ink);color:#fff;position:sticky;top:0;z-index:20;border-bottom:1px solid rgba(255,255,255,.09)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
    .logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg);display:inline-block}
    .logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
    .logo strong{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .main-nav a{font-size:14px;color:#c9c4ca;padding:8px 11px;border-radius:9px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
    .btn-primary:hover{background:#ff7078;color:#fff;transform:translateY(-2px)}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{border-color:var(--coral);color:#ff9da3}
    .btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;background:transparent;color:#fff;font-size:25px}
    .page-hero{background:var(--ink);color:#fff;padding:66px 0 78px}
    .breadcrumb{display:flex;gap:9px;color:#aaa3ad;font-size:13px;margin-bottom:25px}
    .breadcrumb a:hover{color:#fff}
    .page-hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:70px;align-items:center}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    h1{font-size:clamp(34px,4vw,52px);line-height:1.22;letter-spacing:-.055em;margin:16px 0 19px}
    h1 em{font-style:normal;color:#ff8a8d}
    .hero-lead{color:#c9c4ca;max-width:650px;font-size:17px;line-height:1.9}
    .hero-buttons{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .download-visual{min-height:350px;background:#29242d;border:1px solid #48414c;border-radius:28px;padding:25px;position:relative;overflow:hidden}
    .download-visual:before{content:"";position:absolute;width:240px;height:240px;border:1px solid rgba(239,93,104,.35);border-radius:50%;right:-62px;top:-55px}
    .device{width:178px;height:310px;margin:10px auto 0;background:#111016;border:7px solid #514953;border-radius:27px;padding:10px;box-shadow:0 18px 35px rgba(0,0,0,.35);position:relative;z-index:1}
    .device-screen{height:100%;border-radius:17px;background:linear-gradient(150deg,#402933 0%,#17151b 58%,#273b3a 100%);padding:17px 12px;color:#fff}
    .screen-top{height:7px;width:48px;background:#807781;border-radius:9px;margin:0 auto 32px}
    .screen-orb{width:70px;height:70px;border-radius:22px 22px 22px 5px;background:var(--coral);transform:rotate(-8deg);margin:0 auto 20px;position:relative}
    .screen-orb:after{content:"";width:20px;height:20px;background:var(--mint);border-radius:50%;position:absolute;right:12px;top:12px}
    .screen-line{height:9px;background:#65545d;border-radius:9px;margin:11px 0}
    .screen-line.short{width:62%}
    .screen-button{height:34px;border-radius:9px;background:var(--coral);margin-top:27px}
    .visual-caption{position:absolute;left:25px;bottom:22px;color:#d7d0d7;font-size:13px}
    .visual-caption b{display:block;color:var(--mint);font-size:15px}
    .section{padding:84px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:32px}
    .section-head h2{font-size:31px;line-height:1.3;letter-spacing:-.04em;margin:8px 0 0}
    .section-head p{color:var(--muted);max-width:510px;margin:0}
    .download-panel{display:grid;grid-template-columns:.8fr 1.2fr;gap:25px;align-items:stretch}
    .qr-card,.install-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-soft)}
    .qr-card{padding:32px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center}
    .qr-box{width:148px;height:148px;border:10px solid #fff;background:
      linear-gradient(90deg,#29262d 10px,transparent 10px 20px,#29262d 20px 31px,transparent 31px 42px,#29262d 42px 54px,transparent 54px),
      linear-gradient(#29262d 10px,transparent 10px 20px,#29262d 20px 31px,transparent 31px 43px,#29262d 43px 53px,transparent 53px),#eee7e2;
      box-shadow:0 0 0 1px var(--line);margin-bottom:18px}
    .qr-card h3{font-size:19px;margin:0 0 6px}
    .qr-card p{font-size:13px;color:var(--muted);margin:0}
    .install-card{padding:32px}
    .device-tags{display:flex;gap:8px;flex-wrap:wrap;margin:17px 0 24px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 10px;font-size:12px;color:var(--muted);background:var(--paper-2)}
    .tag.mint{border-color:#b4e6da;background:#effaf7;color:#347b6b}
    .install-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:22px 0}
    .meta-box{background:#f2ece7;border-radius:12px;padding:15px}
    .meta-box span{display:block;color:var(--muted);font-size:12px}
    .meta-box b{font-size:14px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .step{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:25px;position:relative}
    .step-number{display:flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;background:var(--coral);color:#fff;font-weight:800;margin-bottom:18px}
    .step h3{font-size:18px;margin:0 0 8px}
    .step p{color:var(--muted);font-size:14px;margin:0}
    .notice{margin-top:25px;border-left:4px solid var(--mint);background:#e9f6f2;border-radius:0 13px 13px 0;padding:15px 18px;color:#49665f;font-size:14px}
    .feature-strip{background:var(--ink-2);color:#fff;border-radius:var(--radius);padding:34px;display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}
    .feature-strip h2{font-size:28px;line-height:1.35;margin:8px 0 12px}
    .feature-strip p{color:#c0b9c1;margin:0}
    .feature-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .feature-item{border:1px solid #4a434e;border-radius:13px;padding:15px;background:#2d2832}
    .feature-item b{display:block;color:var(--mint);font-size:14px;margin-bottom:3px}
    .feature-item span{color:#d1cbd1;font-size:13px}
    .faq-section{background:var(--paper-2)}
    .faq-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:50px}
    .faq-intro p{color:var(--muted)}
    .faq-list{display:grid;gap:10px}
    .faq-list details{border:1px solid var(--line);border-radius:13px;background:#fff;padding:0 20px}
    .faq-list summary{cursor:pointer;list-style:none;padding:18px 4px;font-weight:700;position:relative;padding-right:28px}
    .faq-list summary::-webkit-details-marker{display:none}
    .faq-list summary:after{content:"+";position:absolute;right:3px;color:var(--coral);font-size:22px;top:14px}
    .faq-list details[open] summary:after{content:"−"}
    .faq-answer{border-top:1px solid var(--line);padding:13px 4px 18px;color:var(--muted);font-size:14px}
    .cta{padding:66px 0}
    .cta-box{background:var(--coral);border-radius:var(--radius);padding:35px 42px;color:#fff;display:flex;justify-content:space-between;align-items:center;gap:24px}
    .cta-box h2{margin:0 0 5px;font-size:27px}
    .cta-box p{margin:0;color:#ffe5e6;font-size:14px}
    .site-footer{background:var(--ink);color:#fff;padding:54px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:28px}
    .footer-brand p{color:#aca5ae;font-size:13px;max-width:260px;margin-top:17px}
    .footer-col{display:flex;flex-direction:column;gap:8px}
    .footer-col h4{font-size:14px;margin:0 0 8px}
    .footer-col a{color:#aaa3ad;font-size:13px;transition:.2s}
    .footer-col a:hover{color:#ff949a}
    .copyright{border-top:1px solid #39343d;margin-top:40px;padding-top:20px;display:flex;justify-content:space-between;gap:15px;color:#847d87;font-size:12px;flex-wrap:wrap}
    :focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    @media(max-width:1100px){
      .main-nav{gap:1px}.main-nav a{padding:8px 7px;font-size:13px}.header-actions{margin-left:2px}
      .page-hero-grid{gap:35px}.footer-grid{grid-template-columns:1.4fr repeat(4,1fr);gap:17px}
    }
    @media(max-width:900px){
      .header-inner{height:68px}.main-nav,.header-actions{display:none}.menu-toggle{display:block;margin-left:auto}
      .page-hero-grid,.download-panel,.faq-layout{grid-template-columns:1fr}
      .download-visual{max-width:550px;margin:auto;width:100%}
      .footer-grid{grid-template-columns:repeat(3,1fr)}.footer-brand{grid-column:1/-1}
    }
    @media(max-width:650px){
      .container{width:min(100% - 30px,var(--container))}
      .page-hero{padding:42px 0 52px}.hero-buttons .btn{width:100%}
      h1{font-size:34px}.hero-lead{font-size:15px}
      .section{padding:58px 0}.section-head{display:block}.section-head h2{font-size:25px}.section-head p{margin-top:12px}
      .download-visual{min-height:330px}.install-card,.qr-card{padding:24px}
      .install-meta,.steps,.feature-list{grid-template-columns:1fr}
      .feature-strip{grid-template-columns:1fr;padding:25px}.feature-strip h2{font-size:24px}
      .cta-box{display:block;padding:28px 24px}.cta-box .btn{width:100%;margin-top:20px}
      .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}
      .copyright{display:block}.copyright span{display:block;margin-bottom:7px}
    }
    @media(max-width:420px){.logo strong{font-size:15px}.device{transform:scale(.9);margin-top:-2px;margin-bottom:-20px}}

.mobile-menu{display:none}
@media(max-width:900px){
  .mobile-menu{background:var(--ink-2);padding:8px 24px 18px;border-top:1px solid #39343d}
  .mobile-menu.show{display:block}
  .mobile-menu a{display:block;color:#d5cfd5;padding:10px 0;border-bottom:1px solid #3c3740;font-size:14px}
  .mobile-menu a.active{color:#ff858c}
}

/* roulang page: category6 */
:root{
      --ink:#17151b;--ink-2:#242129;--paper:#f5f1ed;--paper-2:#fffdfa;
      --coral:#ef5d68;--coral-dark:#cf3f52;--mint:#8ad8c5;--gold:#f2bd73;
      --text:#29262d;--muted:#77717b;--line:#ded7d2;--white:#fff;
      --radius:18px;--shadow:0 18px 45px rgba(34,25,31,.10);
      --shadow-soft:0 10px 28px rgba(34,25,31,.07);--container:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.8}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button{font:inherit;border:0;cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:var(--ink);color:#fff;border-bottom:1px solid rgba(255,255,255,.1)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;white-space:nowrap;letter-spacing:-.03em}
    .logo-mark{width:33px;height:33px;border-radius:10px 10px 10px 3px;background:var(--coral);position:relative;transform:rotate(-8deg)}
    .logo-mark:after{content:"";position:absolute;width:10px;height:10px;background:var(--mint);border-radius:50%;right:6px;top:6px}
    .logo strong{font-size:17px}
    .main-nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .main-nav a{font-size:14px;color:#c9c4ca;padding:8px 11px;border-radius:9px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{color:#fff;background:rgba(239,93,104,.16)}
    .main-nav a.active{box-shadow:inset 0 -2px var(--coral)}
    .header-actions{display:flex;gap:9px;margin-left:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:11px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--coral);color:#fff;box-shadow:0 7px 20px rgba(239,93,104,.2)}
    .btn-primary:hover{background:#ff7078;color:#fff;transform:translateY(-2px)}
    .btn-dark{color:#fff;border-color:#56505a;background:transparent}
    .btn-dark:hover{border-color:var(--coral);color:#ff9da3}
    .btn-light{background:#fff;color:var(--ink);border-color:#ebe3de}
    .btn-light:hover{border-color:var(--coral);transform:translateY(-2px)}
    .menu-toggle{display:none;background:transparent;color:#fff;font-size:25px}
    .page-hero{background:var(--ink);color:#fff;padding:66px 0 72px}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:#9d959f;font-size:13px;margin-bottom:26px}
    .breadcrumb a:hover{color:#fff}
    .breadcrumb span{color:var(--coral)}
    .eyebrow,.section-kicker{color:var(--coral);font-size:12px;font-weight:800;letter-spacing:.12em}
    .page-hero h1{font-size:clamp(34px,4vw,52px);line-height:1.22;letter-spacing:-.055em;margin:16px 0 18px;max-width:760px}
    .page-hero h1 em{font-style:normal;color:#ff8a8d}
    .hero-lead{max-width:740px;color:#c9c4ca;font-size:17px;line-height:1.9;margin:0}
    .hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:27px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:99px;padding:4px 11px;font-size:12px;color:var(--muted);background:var(--paper-2)}
    .tag.dark{border-color:#554d59;color:#d8d1d8;background:#332e37}
    .guide-section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:30px}
    .section-head h2{font-size:31px;line-height:1.3;letter-spacing:-.04em;margin:9px 0 0}
    .section-head p{color:var(--muted);max-width:530px;margin:0}
    .guide-layout{display:grid;grid-template-columns:245px 1fr;gap:22px;align-items:start}
    .guide-index{background:var(--ink);padding:14px;border-radius:var(--radius);position:sticky;top:100px}
    .guide-index a{display:block;padding:14px 15px;color:#aaa3ad;border-bottom:1px solid #3c3740;border-radius:11px;font-size:14px;transition:.2s}
    .guide-index a:hover,.guide-index a.active{color:#fff;background:var(--coral)}
    .guide-content{display:grid;gap:16px}
    .guide-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:29px 32px;box-shadow:var(--shadow-soft)}
    .guide-card h3{font-size:22px;line-height:1.35;margin:0 0 10px}
    .guide-card p{color:var(--muted);margin:0 0 15px}
    .guide-card p:last-child{margin-bottom:0}
    .step-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}
    .step{border:1px solid var(--line);border-radius:14px;background:#fff;padding:20px}
    .step b{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:50%;background:var(--coral);color:#fff;font-size:13px;margin-bottom:12px}
    .step h4{font-size:16px;margin:0 0 5px}
    .step p{font-size:13px;line-height:1.7;margin:0}
    .check-list{list-style:none;padding:0;margin:17px 0 0}
    .check-list li{position:relative;padding:7px 0 7px 28px;color:var(--text);font-size:14px}
    .check-list li:before{content:"✓";position:absolute;left:0;color:var(--coral);font-weight:800}
    .notice{background:#fff4e9;border-left:4px solid var(--gold);border-radius:10px;padding:15px 18px;color:#69564a;font-size:14px;margin-top:20px}
    .faq-section{background:var(--paper-2);padding:78px 0}
    .faq-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:48px;align-items:start}
    .faq-intro h2{font-size:31px;line-height:1.3;margin:10px 0 14px}
    .faq-intro p{color:var(--muted);margin:0}
    .faq-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
    .faq-list{display:grid;gap:11px}
    .faq-item{border:1px solid var(--line);border-radius:13px;background:#fff;overflow:hidden}
    .faq-item summary{list-style:none;cursor:pointer;padding:17px 20px;font-weight:700;position:relative;padding-right:48px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";position:absolute;right:19px;color:var(--coral);font-size:22px;line-height:1}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{padding:0 20px 18px;color:var(--muted);font-size:14px;line-height:1.8}
    .download-strip{background:#e9e2dc;padding:28px 0}
    .download-inner{display:flex;align-items:center;justify-content:space-between;gap:25px}
    .download-inner h3{font-size:21px;margin:0 0 4px}
    .download-inner p{color:var(--muted);font-size:14px;margin:0}
    .cta{padding:68px 0}
    .cta-box{background:var(--ink-2);color:#fff;border-radius:var(--radius);padding:38px 44px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta-box h2{font-size:27px;line-height:1.35;margin:0 0 7px}
    .cta-box p{color:#bdb5bf;margin:0;font-size:14px}
    .cta-actions{display:flex;gap:10px;flex-wrap:wrap}
    .site-footer{background:var(--ink);color:#fff;padding:54px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.6fr repeat(4,1fr);gap:30px}
    .footer-brand p{color:#aaa3ad;font-size:13px;max-width:270px;margin:17px 0 0}
    .footer-col{display:flex;flex-direction:column;gap:8px}
    .footer-col h4{font-size:14px;margin:0 0 8px}
    .footer-col a{font-size:13px;color:#aaa3ad;transition:.2s}
    .footer-col a:hover{color:#ff8a8d}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #39343d;color:#827a85;font-size:12px;margin-top:40px;padding-top:18px}
    :focus-visible{outline:3px solid rgba(138,216,197,.85);outline-offset:3px}
    @media(max-width:1100px){
      .main-nav{gap:0}.main-nav a{padding:8px 7px;font-size:13px}.header-actions{display:none}
      .footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}.footer-col:last-child{display:none}
    }
    @media(max-width:800px){
      .container{width:min(var(--container),calc(100% - 34px))}
      .header-inner{height:68px}.menu-toggle{display:block;margin-left:auto}
      .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--ink);padding:12px 17px 18px;flex-direction:column;align-items:stretch;border-top:1px solid #39343d}
      .main-nav.open{display:flex}.main-nav a{padding:12px 14px;border-bottom:1px solid #39343d}
      .page-hero{padding:48px 0 54px}.page-hero h1{font-size:36px}
      .guide-layout,.faq-grid{grid-template-columns:1fr}.guide-index{position:static;display:flex;overflow:auto;gap:5px}.guide-index a{white-space:nowrap;border-bottom:0}
      .step-row{grid-template-columns:1fr}.download-inner,.cta-box{align-items:flex-start;flex-direction:column}.cta-box{padding:30px 25px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand{grid-column:1/-1}
    }
    @media(max-width:520px){
      .page-hero h1{font-size:30px}.hero-lead{font-size:15px}.guide-section,.faq-section{padding:56px 0}
      .section-head{display:block}.section-head h2,.faq-intro h2{font-size:25px}.section-head p{margin-top:12px}
      .guide-card{padding:23px 20px}.download-strip{padding:23px 0}.cta{padding:50px 0}
      .cta-box h2{font-size:23px}.cta-actions,.cta-actions .btn{width:100%}
      .copyright{display:block}.copyright span{display:block;margin-top:7px}
      .logo strong{font-size:15px}
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}