/* roulang page: index */
:root{
  --ink:#182421;--deep:#203630;--deep-2:#29463d;--muted:#66736f;--line:#d9e1dc;
  --paper:#f4f6f2;--white:#fff;--mint:#dcece3;--accent:#b87542;--accent-2:#3e8b76;
  --radius:14px;--shadow:0 14px 36px rgba(28,48,41,.08);--max:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
a{color:inherit;text-decoration:none;transition:.25s ease}
img{display:block;max-width:100%}
button,input,textarea,select{font:inherit}
button{cursor:pointer}
.container{width:min(var(--max),calc(100% - 48px));margin:auto}
.section{padding:96px 0}
.section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:38px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.08em}
.eyebrow:before{content:"";width:26px;height:2px;background:var(--accent)}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.035em}
h2{font-size:clamp(28px,3.5vw,45px);margin-top:12px}
.lead{color:var(--muted);max-width:590px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;border-radius:8px;padding:12px 21px;font-weight:700;min-height:46px}
.btn-primary{background:var(--deep);color:#fff}
.btn-primary:hover{background:var(--accent-2);transform:translateY(-2px)}
.btn-outline{border-color:#b8c9c0;color:var(--deep)}
.btn-outline:hover{border-color:var(--deep);background:var(--mint)}
.btn:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(184,117,66,.38);outline-offset:3px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(250,251,248,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.navbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:25px}
.logo{display:flex;align-items:center;gap:11px;color:var(--deep);font-weight:800;white-space:nowrap}
.logo-mark{width:34px;height:34px;border:2px solid var(--accent);border-radius:9px;position:relative}
.logo-mark:after,.logo-mark:before{content:"";position:absolute;background:var(--accent-2)}
.logo-mark:before{width:15px;height:2px;left:8px;top:10px;box-shadow:0 7px 0 var(--accent-2)}
.logo-mark:after{width:2px;height:15px;left:15px;top:8px}
.logo strong{font-size:17px}.logo small{display:block;color:var(--muted);font-size:11px;font-weight:500}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{position:relative;color:#52615c;font-size:14px;padding:26px 0}
.nav-links a:hover,.nav-links a.active{color:var(--deep)}
.nav-links a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;background:var(--accent)}
.nav-action{padding:9px 15px!important;background:var(--accent);color:white!important;border-radius:7px}
.nav-action:hover{background:var(--deep)!important}
.menu-toggle{display:none;border:0;background:transparent;color:var(--deep);font-size:25px}
.hero{padding:94px 0 88px;background:linear-gradient(115deg,#f4f6f2 0%,#edf3ee 62%,#dce9e0 100%);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:72px}
.hero h1{font-size:clamp(42px,5.5vw,72px);max-width:680px;color:var(--deep);margin:17px 0 23px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-copy{font-size:18px;color:#53635e;max-width:600px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}
.hero-visual{min-height:390px;position:relative;display:flex;align-items:center;justify-content:center}
.device-panel{width:88%;height:300px;background:var(--deep);border-radius:20px 20px 8px 8px;position:relative;box-shadow:24px 24px 0 rgba(184,117,66,.16),var(--shadow);transform:rotate(-3deg)}
.device-panel:before{content:"PG电子";position:absolute;top:28px;left:35px;color:#dcece3;font-size:22px;font-weight:800}
.device-panel:after{content:"";position:absolute;left:35px;right:35px;bottom:38px;height:84px;border-left:2px solid #b87542;border-bottom:2px solid #b87542;background:repeating-linear-gradient(90deg,transparent 0 38px,rgba(220,236,227,.2) 39px 40px),repeating-linear-gradient(0deg,transparent 0 25px,rgba(220,236,227,.15) 26px 27px)}
.visual-chip{position:absolute;right:4%;top:15%;background:#fff;padding:17px 19px;border-radius:10px;box-shadow:var(--shadow);font-weight:700;color:var(--deep)}
.visual-chip span{display:block;color:var(--accent);font-size:12px;font-weight:500}
.visual-line{position:absolute;bottom:12%;left:4%;width:115px;height:55px;border-left:2px solid var(--accent-2);border-bottom:2px solid var(--accent-2)}
.info-strip{background:var(--deep);color:#fff;padding:25px 0}
.info-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.info-item{padding:5px 25px;border-left:1px solid rgba(255,255,255,.18)}
.info-item:first-child{border:0}.info-item b{display:block;color:#fff;font-size:16px}.info-item span{font-size:13px;color:#b9cbc2}
.overview{background:#fff}
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px;align-items:start}
.overview-text p{margin-top:22px;color:var(--muted)}
.note-link{display:inline-flex;margin-top:25px;color:var(--accent);font-weight:700;border-bottom:1px solid var(--accent)}
.detail-board{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.detail-card{padding:25px;background:var(--paper);border-left:3px solid var(--accent-2);min-height:135px}
.detail-card b{display:block;font-size:20px;margin-bottom:7px;color:var(--deep)}
.detail-card span{color:var(--muted);font-size:14px}
.products{background:var(--paper)}
.product-list{border-top:1px solid var(--line)}
.product-row{display:grid;grid-template-columns:70px 1fr 1.1fr 130px;gap:24px;align-items:center;padding:25px 0;border-bottom:1px solid var(--line);transition:.25s}
.product-row:hover{padding-left:12px;background:#eef3ee}
.number{font-size:25px;color:var(--accent);font-weight:800}
.product-row h3{font-size:22px;color:var(--deep)}.product-row p{color:var(--muted);font-size:14px}
.tags{display:flex;flex-wrap:wrap;gap:7px}.tag{font-size:12px;border:1px solid #c7d6cf;color:#597068;padding:3px 9px;border-radius:20px;background:#f8faf7}
.arrow{color:var(--accent);font-weight:800;text-align:right}
.tech{background:var(--deep-2);color:#fff}.tech .lead{color:#c9d7d0}.tech .eyebrow{color:#dfaa79}
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(255,255,255,.18);margin-top:20px}
.tech-step{background:var(--deep-2);padding:30px 24px;min-height:190px}.tech-step b{font-size:13px;color:#dfaa79}.tech-step h3{font-size:21px;margin:23px 0 10px}.tech-step p{font-size:14px;color:#c9d7d0}
.scenes{background:#fff}.scene-grid{display:grid;grid-template-columns:1.35fr .85fr .85fr;gap:15px}
.scene-card{min-height:245px;padding:25px;display:flex;flex-direction:column;justify-content:end;border-radius:12px;background:linear-gradient(145deg,#d8e9df,#f4f6f2);border:1px solid #d5e2db}
.scene-card:first-child{background:linear-gradient(145deg,#c5ddd0,#eef4ef)}
.scene-card h3{font-size:25px;color:var(--deep);margin-bottom:6px}.scene-card p{color:#5c6b65;font-size:14px}
.quality{background:#e8eee9}.quality-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:70px}
.checklist{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:28px}
.check{padding:18px;background:#fff;border:1px solid var(--line);border-radius:10px}.check b{display:block;color:var(--deep);margin-bottom:4px}.check span{font-size:13px;color:var(--muted)}
.service{background:#fff}.service-panel{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.service-box{background:#fff;padding:31px}.service-box:nth-child(2),.service-box:nth-child(3){background:#f1f5f1}.service-box h3{font-size:21px;color:var(--deep);margin-bottom:8px}.service-box p{color:var(--muted);font-size:14px}
.news{background:var(--paper)}.news-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:38px}.feature-news{background:var(--deep);color:#fff;padding:32px;border-radius:14px;min-height:280px;display:flex;flex-direction:column;justify-content:end}.feature-news .tag{border-color:#6b9382;color:#d9ebe1;background:transparent;width:max-content}.feature-news h3{font-size:27px;margin:18px 0 8px}.feature-news p{color:#c5d7ce;font-size:14px}.news-list{border-top:1px solid var(--line)}.news-item{display:grid;grid-template-columns:92px 1fr;gap:18px;padding:17px 0;border-bottom:1px solid var(--line)}.news-item time{color:var(--accent);font-weight:700;font-size:13px}.news-item h3{font-size:17px;color:var(--deep)}.news-item p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.timeline{background:#fff}.timeline-list{border-left:2px solid #c8d9d0;margin:8px 0 0 14px}.timeline-item{position:relative;padding:0 0 30px 35px}.timeline-item:before{content:"";position:absolute;left:-8px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:0 0 0 1px var(--accent)}.timeline-item time{font-size:12px;color:var(--accent)}.timeline-item h3{font-size:20px;margin:4px 0}.timeline-item p{color:var(--muted);font-size:14px}
.app{background:#dce9e0}.app-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:65px;align-items:center}.app-device{width:220px;height:355px;margin:auto;background:var(--deep);border:8px solid #314e44;border-radius:28px;box-shadow:17px 20px 0 rgba(62,139,118,.18);padding:35px 18px;color:#dcece3}.app-device strong{font-size:25px}.app-device .screen-lines{margin-top:48px;border-top:2px solid var(--accent);padding-top:18px;line-height:2.8;color:#bcd4c8}.app-info h2{color:var(--deep)}.app-info p{color:var(--muted);margin:17px 0 22px}.download-box{display:flex;align-items:center;gap:20px;background:#fff;padding:18px;border-radius:10px}.qr{width:72px;height:72px;border:6px solid var(--deep);background:repeating-linear-gradient(45deg,#fff 0 5px,var(--deep) 6px 9px);flex:none}.download-box small{display:block;color:var(--muted);margin-bottom:8px}
.faq{background:var(--paper)}.faq-list{max-width:850px;margin:auto}.faq-item{border-top:1px solid var(--line)}.faq-q{width:100%;padding:20px 4px;background:none;border:0;text-align:left;display:flex;justify-content:space-between;align-items:center;color:var(--deep);font-weight:700}.faq-q span{color:var(--accent);font-size:22px}.faq-a{display:none;padding:0 38px 20px 4px;color:var(--muted);font-size:14px}.faq-item.open .faq-a{display:block}
.contact{background:#fff}.contact-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px}.contact-copy p{color:var(--muted);margin:18px 0}.contact-lines{border-top:1px solid var(--line);margin-top:28px}.contact-lines div{padding:13px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between}.contact-lines span{color:var(--muted);font-size:13px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}.field label{font-weight:700;font-size:14px}.field input,.field select,.field textarea{border:1px solid var(--line);background:#f8faf8;border-radius:7px;padding:12px 13px;color:var(--ink)}.field textarea{min-height:120px;resize:vertical}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent-2);background:#fff;outline:0}.form-note{font-size:12px;color:var(--muted);margin:12px 0}
.recommend{background:var(--paper)}.recommend-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:15px}.recommend-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:12px}.recommend-card:first-child{background:var(--mint)}.recommend-card h3{font-size:20px;color:var(--deep);margin:13px 0 8px}.recommend-card p{font-size:13px;color:var(--muted)}.recommend-card .tag{width:max-content}
.cta-band{background:var(--deep);color:#fff;padding:62px 0}.cta-band .inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-band h2{font-size:32px}.cta-band p{color:#c8d8d0;margin-top:8px}.cta-band .btn-primary{background:var(--accent)}.cta-band .btn-primary:hover{background:#d69259}
.site-footer{background:#182823;color:#d8e4de;padding:55px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}.footer-brand p{font-size:13px;color:#9fb3a9;max-width:280px;margin-top:15px}.footer-title{font-size:14px;color:#fff;font-weight:700;margin-bottom:13px}.footer-links{display:grid;gap:7px}.footer-links a{font-size:13px;color:#9fb3a9}.footer-links a:hover{color:#dfaa79}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:42px;padding-top:18px;color:#83998e;font-size:12px;display:flex;justify-content:space-between;gap:20px}
@media(max-width:1024px){.nav-links{gap:12px}.nav-links a{font-size:13px}.hero-grid{gap:35px}.split,.quality-grid{gap:40px}.product-row{grid-template-columns:55px 1fr 1fr 100px}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}}
@media(max-width:768px){.container{width:min(var(--max),calc(100% - 34px))}.section{padding:68px 0}.navbar{height:68px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;top:68px;left:0;right:0;padding:15px 17px 22px;background:#fafbf8;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav-links.show{display:flex}.nav-links a{padding:10px 0}.nav-links a.active:after{bottom:3px;right:auto;width:30px}.nav-action{margin-top:4px;text-align:center}.hero{padding:65px 0}.hero-grid,.split,.quality-grid,.app-grid,.contact-grid,.news-layout{grid-template-columns:1fr}.hero-visual{min-height:310px;margin-top:15px}.info-grid{grid-template-columns:1fr 1fr;gap:18px}.info-item{padding:5px 14px}.info-item:nth-child(3){border-left:0}.tech-grid{grid-template-columns:1fr 1fr}.scene-grid{grid-template-columns:1fr 1fr}.scene-card:first-child{grid-column:1/-1}.product-row{grid-template-columns:44px 1fr 95px;gap:12px}.product-row .tags{grid-column:2}.product-row .arrow{grid-column:3;grid-row:1/3}.checklist{gap:10px}.app-device{margin-bottom:10px}.recommend-grid{grid-template-columns:1fr 1fr}.recommend-card:first-child{grid-column:1/-1}.cta-band .inner{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.copyright{flex-direction:column}}
@media(max-width:520px){body{font-size:14px}.hero h1{font-size:39px}.hero-copy{font-size:16px}.hero-actions .btn{width:100%}.hero-visual{min-height:245px}.device-panel{height:210px}.visual-chip{font-size:13px;padding:11px}.info-grid{grid-template-columns:1fr 1fr;gap:10px}.info-item b{font-size:14px}.info-item span{font-size:11px}.section-head{display:block}.section-head .lead{margin-top:15px}.detail-board,.scene-grid,.service-panel,.tech-grid,.form-grid,.recommend-grid{grid-template-columns:1fr}.scene-card:first-child,.recommend-card:first-child{grid-column:auto}.product-row{grid-template-columns:33px 1fr 70px}.product-row h3{font-size:18px}.product-row p{font-size:12px}.product-row .tags{grid-column:2/4}.arrow{font-size:13px}.news-item{grid-template-columns:70px 1fr;gap:10px}.download-box{align-items:flex-start}.footer-grid{grid-template-columns:1fr}.copyright{margin-top:30px}.logo small{display:none}}

/* roulang page: article */
:root{
      --ink:#182421;
      --deep:#203630;
      --deep-2:#29463d;
      --muted:#66736f;
      --line:#d9e1dc;
      --paper:#f4f6f2;
      --white:#fff;
      --mint:#dcece3;
      --accent:#b87542;
      --accent-2:#3e8b76;
      --radius:14px;
      --shadow:0 14px 36px rgba(28,48,41,.08);
      --max:1200px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      font-size:15px;
      line-height:1.75;
    }
    h1,h2,h3,h4,p{margin-top:0}
    h1,h2,h3,h4{line-height:1.3}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:0 auto}
    .section{padding:92px 0}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      color:var(--accent);
      font-size:13px;
      font-weight:700;
      letter-spacing:.08em;
    }
    .eyebrow:before{
      content:"";
      width:26px;
      height:2px;
      background:var(--accent);
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:46px;
      padding:12px 21px;
      border:1px solid transparent;
      border-radius:8px;
      font-weight:700;
    }
    .btn-primary{background:var(--deep);color:#fff}
    .btn-primary:hover{background:var(--accent-2);color:#fff;transform:translateY(-2px)}
    .btn-outline{border-color:#b8c9c0;color:var(--deep);background:transparent}
    .btn-outline:hover{border-color:var(--deep);background:var(--mint)}
    .btn:focus-visible,
    a:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible{
      outline:3px solid rgba(184,117,66,.38);
      outline-offset:3px;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:20;
      background:rgba(250,251,248,.95);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .navbar{
      height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:25px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:11px;
      color:var(--deep);
      font-weight:800;
      white-space:nowrap;
    }
    .logo-mark{
      width:34px;
      height:34px;
      border:2px solid var(--accent);
      border-radius:9px;
      position:relative;
      flex:none;
    }
    .logo-mark:after,.logo-mark:before{
      content:"";
      position:absolute;
      background:var(--accent-2);
    }
    .logo-mark:before{
      width:15px;
      height:2px;
      left:8px;
      top:10px;
      box-shadow:0 7px 0 var(--accent-2);
    }
    .logo-mark:after{
      width:2px;
      height:15px;
      left:15px;
      top:8px;
    }
    .logo strong{font-size:17px}
    .logo small{
      display:block;
      color:var(--muted);
      font-size:11px;
      font-weight:500;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:22px;
    }
    .nav-links a{
      position:relative;
      color:#52615c;
      font-size:14px;
      padding:26px 0;
    }
    .nav-links a:hover,
    .nav-links a.active{color:var(--deep)}
    .nav-links a.active:after{
      content:"";
      position:absolute;
      left:0;
      right:0;
      bottom:17px;
      height:2px;
      background:var(--accent);
    }
    .nav-action{
      padding:9px 15px!important;
      background:var(--accent);
      color:#fff!important;
      border-radius:7px;
    }
    .nav-action:hover{background:var(--deep)!important}
    .menu-toggle{
      display:none;
      border:0;
      background:transparent;
      color:var(--deep);
      font-size:25px;
      line-height:1;
    }

    .article-intro{
      padding:76px 0 58px;
      background:linear-gradient(115deg,#f4f6f2 0%,#edf3ee 65%,#dce9e0 100%);
      border-bottom:1px solid var(--line);
    }
    .breadcrumbs{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:9px;
      margin-bottom:30px;
      color:var(--muted);
      font-size:13px;
    }
    .breadcrumbs a:hover{color:var(--accent)}
    .breadcrumbs .separator{color:#9aaba3}
    .article-heading{
      max-width:900px;
    }
    .article-heading h1{
      margin:16px 0 20px;
      color:var(--deep);
      font-size:clamp(34px,5vw,62px);
      letter-spacing:-.03em;
    }
    .article-summary{
      max-width:780px;
      margin-bottom:26px;
      color:#53635e;
      font-size:18px;
    }
    .article-meta{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:10px 22px;
      color:var(--muted);
      font-size:13px;
    }
    .meta-label{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .meta-label strong{color:var(--deep)}
    .tag{
      display:inline-flex;
      align-items:center;
      padding:4px 10px;
      border:1px solid #c7d6cf;
      border-radius:20px;
      background:#f8faf7;
      color:#597068;
      font-size:12px;
    }

    .article-shell{
      display:grid;
      grid-template-columns:minmax(0,780px) 250px;
      gap:78px;
      align-items:start;
    }
    .article-content{
      min-width:0;
      color:#3d4b46;
      font-size:16px;
    }
    .article-content h2{
      margin:42px 0 17px;
      padding-left:16px;
      border-left:3px solid var(--accent-2);
      color:var(--deep);
      font-size:27px;
    }
    .article-content h3{
      margin:30px 0 12px;
      color:var(--deep);
      font-size:21px;
    }
    .article-content p{margin-bottom:20px}
    .article-content ul,
    .article-content ol{
      margin:0 0 24px;
      padding-left:25px;
    }
    .article-content li{margin:8px 0}
    .article-content blockquote{
      margin:30px 0;
      padding:22px 25px;
      border-left:4px solid var(--accent);
      background:#eaf1ec;
      color:var(--deep-2);
    }
    .article-content img{
      width:100%;
      margin:28px 0;
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .article-content table{
      display:block;
      width:100%;
      overflow-x:auto;
      border-collapse:collapse;
      margin:28px 0;
      background:#fff;
    }
    .article-content th,
    .article-content td{
      min-width:130px;
      padding:12px 15px;
      border:1px solid var(--line);
      text-align:left;
    }
    .article-content th{
      background:var(--mint);
      color:var(--deep);
    }

    .reading-panel{
      position:sticky;
      top:102px;
      padding:22px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#fff;
      box-shadow:var(--shadow);
    }
    .reading-panel h2{
      margin:0 0 17px;
      color:var(--deep);
      font-size:18px;
    }
    .reading-line{
      height:1px;
      margin-bottom:17px;
      background:var(--line);
    }
    .reading-panel p{
      margin-bottom:13px;
      color:var(--muted);
      font-size:13px;
    }
    .reading-mark{
      display:block;
      width:32px;
      height:4px;
      margin-bottom:20px;
      border-radius:5px;
      background:var(--accent);
    }

    .article-note{
      margin-top:48px;
      padding:24px 26px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#edf3ee;
    }
    .article-note h2{
      margin-bottom:9px;
      color:var(--deep);
      font-size:19px;
    }
    .article-note p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .empty-state{
      padding:70px 30px;
      border:1px dashed #b9c9c0;
      border-radius:var(--radius);
      background:#fff;
      text-align:center;
    }
    .empty-state h1{
      margin-bottom:10px;
      color:var(--deep);
      font-size:28px;
    }
    .empty-state p{
      margin-bottom:24px;
      color:var(--muted);
    }

    .article-footer-actions{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:20px;
      margin-top:48px;
      padding-top:27px;
      border-top:1px solid var(--line);
    }
    .back-link{
      color:var(--deep);
      font-weight:700;
    }
    .back-link:hover{color:var(--accent)}

    .site-footer{
      padding:60px 0 22px;
      background:var(--deep);
      color:#dce8e1;
    }
    .footer-grid{
      display:grid;
      grid-template-columns:1.7fr 1fr 1fr 1fr;
      gap:38px;
    }
    .footer-brand p{
      max-width:300px;
      margin:20px 0 0;
      color:#b9cbc2;
      font-size:13px;
    }
    .site-footer .logo{color:#fff}
    .site-footer .logo small{color:#b9cbc2}
    .footer-title{
      margin-bottom:15px;
      color:#fff;
      font-size:14px;
      font-weight:700;
    }
    .footer-links{
      display:grid;
      gap:9px;
      color:#b9cbc2;
      font-size:13px;
    }
    .footer-links a:hover{color:#fff;transform:translateX(3px)}
    .copyright{
      display:flex;
      justify-content:space-between;
      gap:20px;
      margin-top:45px;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.14);
      color:#91aaa0;
      font-size:12px;
    }

    @media (max-width:1024px){
      .nav-links{gap:14px}
      .article-shell{grid-template-columns:minmax(0,1fr) 220px;gap:38px}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
    }
    @media (max-width:768px){
      .container{width:min(var(--max),calc(100% - 36px))}
      .navbar{height:68px}
      .menu-toggle{display:block}
      .nav-links{
        display:none;
        position:absolute;
        top:68px;
        left:18px;
        right:18px;
        flex-direction:column;
        align-items:stretch;
        gap:0;
        padding:10px 18px 18px;
        border:1px solid var(--line);
        border-radius:0 0 12px 12px;
        background:#fafbf8;
        box-shadow:var(--shadow);
      }
      .nav-links.is-open{display:flex}
      .nav-links a{padding:11px 0}
      .nav-links a.active:after{bottom:4px;right:auto;width:28px}
      .nav-action{text-align:center;margin-top:8px}
      .article-intro{padding:55px 0 42px}
      .article-heading h1{font-size:39px}
      .article-summary{font-size:16px}
      .article-shell{display:block}
      .reading-panel{
        position:static;
        margin-top:38px;
      }
      .article-content{font-size:15px}
      .article-footer-actions{align-items:stretch;flex-direction:column}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-brand{grid-column:1/-1}
    }
    @media (max-width:520px){
      .container{width:calc(100% - 30px)}
      .logo strong{font-size:15px}
      .logo small{font-size:10px}
      .article-heading h1{font-size:32px}
      .breadcrumbs{margin-bottom:22px}
      .article-meta{display:grid;gap:8px}
      .section{padding:64px 0}
      .footer-grid{grid-template-columns:1fr}
      .copyright{display:grid;gap:7px}
    }

/* roulang page: category1 */
:root{
      --ink:#182421;--deep:#203630;--deep-2:#29463d;--muted:#66736f;--line:#d9e1dc;
      --paper:#f4f6f2;--white:#fff;--mint:#dcece3;--accent:#b87542;--accent-2:#3e8b76;
      --radius:14px;--shadow:0 14px 36px rgba(28,48,41,.08);--max:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(250,251,248,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .navbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--deep);font-weight:800;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border:2px solid var(--accent);border-radius:9px;position:relative}
    .logo-mark:after,.logo-mark:before{content:"";position:absolute;background:var(--accent-2)}
    .logo-mark:before{width:15px;height:2px;left:8px;top:10px;box-shadow:0 7px 0 var(--accent-2)}
    .logo-mark:after{width:2px;height:15px;left:15px;top:8px}
    .logo strong{font-size:17px}.logo small{display:block;color:var(--muted);font-size:11px;font-weight:500}
    .nav-links{display:flex;align-items:center;gap:22px}
    .nav-links a{position:relative;color:#52615c;font-size:14px;padding:26px 0}
    .nav-links a:hover,.nav-links a.active{color:var(--deep)}
    .nav-links a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;background:var(--accent)}
    .nav-action{padding:9px 15px!important;background:var(--accent);color:#fff!important;border-radius:7px}
    .nav-action:hover{background:var(--deep)!important}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--deep);font-size:25px}
    .page-heading{padding:68px 0 58px;background:#e8f0e9;border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:20px}
    .breadcrumb span{color:#a3ada8}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.08em}
    .eyebrow:before{content:"";width:26px;height:2px;background:var(--accent)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,62px);line-height:1.2;color:var(--deep);margin:14px 0 17px;max-width:760px}
    h2{font-size:clamp(28px,3.5vw,42px);line-height:1.25;color:var(--deep);margin-bottom:14px}
    h3{color:var(--deep);line-height:1.35}
    .heading-copy{max-width:700px;color:var(--muted);font-size:17px}
    .section{padding:88px 0}
    .section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:34px}
    .lead{color:var(--muted);max-width:590px}
    .meta-strip{background:var(--deep);color:#fff;padding:25px 0}
    .meta-grid{display:grid;grid-template-columns:repeat(4,1fr)}
    .meta-item{padding:4px 25px;border-left:1px solid rgba(255,255,255,.18)}
    .meta-item:first-child{border-left:0}
    .meta-item b{display:block;font-size:16px}.meta-item span{color:#bdcec6;font-size:13px}
    .product-list{border-top:1px solid var(--line)}
    .product-row{display:grid;grid-template-columns:70px 1fr 1.25fr 140px;gap:25px;align-items:center;padding:28px 15px 28px 0;border-bottom:1px solid var(--line);transition:.25s}
    .product-row:hover{padding-left:14px;background:#edf3ee}
    .number{font-size:14px;color:var(--accent);font-weight:800;letter-spacing:.08em}
    .product-row h3{font-size:23px;margin-bottom:8px}
    .product-row p{color:var(--muted);font-size:14px;margin-bottom:0}
    .tags{display:flex;flex-wrap:wrap;gap:7px}
    .tag{font-size:12px;border:1px solid #c7d6cf;color:#597068;padding:3px 9px;border-radius:20px;background:#f8faf7}
    .arrow{color:var(--accent);font-weight:800;text-align:right}
    .arrow:hover{color:var(--deep);transform:translateX(4px)}
    .feature{display:grid;grid-template-columns:1.1fr .9fr;gap:0;background:var(--deep);border-radius:var(--radius);overflow:hidden;color:#fff;box-shadow:var(--shadow)}
    .feature-copy{padding:48px}
    .feature-copy h2{color:#fff}.feature-copy p{color:#c8d8d0;max-width:560px}
    .feature-label{display:inline-block;color:#e0ae80;font-size:13px;font-weight:700;margin-bottom:18px}
    .feature-visual{min-height:320px;background:linear-gradient(145deg,#c8ded2,#7da998);position:relative;overflow:hidden}
    .circuit,.circuit:before,.circuit:after{position:absolute;border:1px solid rgba(255,255,255,.65);content:""}
    .circuit{width:230px;height:230px;right:15%;top:18%;transform:rotate(45deg)}
    .circuit:before{width:150px;height:150px;left:39px;top:39px}
    .circuit:after{width:60px;height:60px;left:84px;top:84px;background:rgba(255,255,255,.2)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;border-radius:8px;padding:12px 21px;font-weight:700;min-height:46px}
    .btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:#9d5e32;transform:translateY(-2px)}
    .btn-outline{border-color:#b8c9c0;color:var(--deep)}.btn-outline:hover{border-color:var(--deep);background:var(--mint)}
    .feature .btn-outline{border-color:#78988b;color:#fff}.feature .btn-outline:hover{background:#35564b;border-color:#b7d0c4}
    .selection{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .selection-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:26px;min-height:190px}
    .selection-card strong{display:flex;align-items:center;gap:12px;color:var(--accent);font-size:14px;margin-bottom:18px}
    .selection-card strong i{font-style:normal;border:1px solid var(--accent);border-radius:50%;width:28px;height:28px;text-align:center;line-height:26px}
    .selection-card p{color:var(--muted);font-size:14px;margin-bottom:0}
    .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
    .support-card{padding:28px;background:#fff;border-left:3px solid var(--accent-2);border-radius:10px;box-shadow:var(--shadow)}
    .support-card h3{margin-bottom:8px}.support-card p{color:var(--muted);margin-bottom:0}
    .faq-list{border-top:1px solid var(--line);max-width:900px}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-item summary{padding:21px 4px;font-weight:700;color:var(--deep);cursor:pointer;list-style:none;display:flex;justify-content:space-between}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"＋";color:var(--accent);font-size:20px}
    .faq-item[open] summary:after{content:"－"}
    .faq-answer{padding:0 38px 22px 4px;color:var(--muted);font-size:14px}
    .cta{background:var(--mint);padding:48px 0}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px}
    .cta h2{margin-bottom:5px}.cta p{color:var(--muted);margin:0}
    .site-footer{background:var(--deep);color:#c9d8d1;padding:60px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
    .footer-brand p{font-size:13px;color:#aebfb7;max-width:300px;margin-top:18px}
    .footer-brand .logo{color:#fff}.footer-title{color:#fff;font-weight:700;margin-bottom:15px}
    .footer-links{display:grid;gap:8px;font-size:13px;color:#b5c8bf}
    .footer-links a:hover{color:#e0ae80}
    .copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:45px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#91a69c}
    :focus-visible{outline:3px solid rgba(184,117,66,.4);outline-offset:3px}
    @media(max-width:1024px){.nav-links{gap:13px}.nav-links a{font-size:13px}.hero-grid,.feature{grid-template-columns:1fr}.feature-visual{min-height:230px}.product-row{grid-template-columns:55px 1fr}.product-row .tags{grid-column:2}.product-row .arrow{grid-column:2;text-align:left}}
    @media(max-width:768px){.container{width:min(var(--max),calc(100% - 34px))}.navbar{height:68px}.menu-toggle{display:block}.nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fafbf8;border-bottom:1px solid var(--line);padding:12px 22px 20px;flex-direction:column;align-items:stretch;gap:0;box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-links a{padding:11px 0}.nav-links a.active:after{bottom:7px}.nav-action{text-align:center;margin-top:8px}.page-heading{padding:48px 0}.section{padding:62px 0}.meta-grid{grid-template-columns:1fr 1fr;gap:20px}.meta-item:nth-child(3){border-left:0}.section-head,.cta-inner{display:block}.section-head .lead{margin-top:15px}.selection,.support-grid{grid-template-columns:1fr}.feature-copy{padding:32px 25px}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:5px}}
    @media(max-width:520px){h1{font-size:37px}.heading-copy{font-size:15px}.meta-grid{grid-template-columns:1fr}.meta-item{border-left:0;border-top:1px solid rgba(255,255,255,.18);padding:12px 0}.meta-item:first-child{border-top:0}.product-row{gap:14px;padding:23px 0}.product-row h3{font-size:19px}.feature-visual{min-height:190px}.footer-grid{grid-template-columns:1fr}.cta .btn{margin-top:22px;width:100%}}

/* roulang page: category2 */
:root{
      --ink:#182421;
      --deep:#203630;
      --deep-2:#29463d;
      --muted:#66736f;
      --line:#d9e1dc;
      --paper:#f4f6f2;
      --white:#fff;
      --mint:#dcece3;
      --accent:#b87542;
      --accent-2:#3e8b76;
      --radius:14px;
      --shadow:0 14px 36px rgba(28,48,41,.08);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      color:var(--ink);
      background:var(--paper);
      line-height:1.75;
      font-size:15px;
    }
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .section{padding:86px 0}
    .section-head{
      display:flex;
      justify-content:space-between;
      gap:32px;
      align-items:end;
      margin-bottom:36px;
    }
    .section-head h2{margin:0;color:var(--deep);font-size:clamp(28px,3.4vw,42px);line-height:1.25}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      color:var(--accent);
      font-weight:700;
      font-size:13px;
      letter-spacing:.08em;
    }
    .eyebrow:before{content:"";width:26px;height:2px;background:var(--accent)}
    .lead{color:var(--muted);max-width:620px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      border:1px solid transparent;
      border-radius:8px;
      padding:12px 21px;
      font-weight:700;
      min-height:46px;
    }
    .btn-primary{background:var(--deep);color:#fff}
    .btn-primary:hover{background:var(--accent-2);transform:translateY(-2px)}
    .btn-outline{border-color:#b8c9c0;color:var(--deep)}
    .btn-outline:hover{border-color:var(--deep);background:var(--mint)}
    .btn:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
      outline:3px solid rgba(184,117,66,.38);
      outline-offset:3px;
    }
    .site-header{
      position:sticky;
      top:0;
      z-index:20;
      background:rgba(250,251,248,.95);
      border-bottom:1px solid var(--line);
      backdrop-filter:blur(12px);
    }
    .navbar{
      height:76px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:25px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:11px;
      color:var(--deep);
      font-weight:800;
      white-space:nowrap;
    }
    .logo-mark{
      width:34px;
      height:34px;
      border:2px solid var(--accent);
      border-radius:9px;
      position:relative;
      flex:none;
    }
    .logo-mark:after,.logo-mark:before{
      content:"";
      position:absolute;
      background:var(--accent-2);
    }
    .logo-mark:before{
      width:15px;
      height:2px;
      left:8px;
      top:10px;
      box-shadow:0 7px 0 var(--accent-2);
    }
    .logo-mark:after{width:2px;height:15px;left:15px;top:8px}
    .logo strong{font-size:17px}
    .logo small{display:block;color:var(--muted);font-size:11px;font-weight:500}
    .nav-links{display:flex;align-items:center;gap:22px}
    .nav-links a{
      position:relative;
      color:#52615c;
      font-size:14px;
      padding:26px 0;
    }
    .nav-links a:hover,.nav-links a.active{color:var(--deep)}
    .nav-links a.active:after{
      content:"";
      position:absolute;
      left:0;
      right:0;
      bottom:17px;
      height:2px;
      background:var(--accent);
    }
    .nav-action{
      padding:9px 15px!important;
      background:var(--accent);
      color:white!important;
      border-radius:7px;
    }
    .nav-action:hover{background:var(--deep)!important}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--deep);font-size:25px}
    .page-intro{
      padding:72px 0 58px;
      background:
        linear-gradient(90deg,rgba(220,236,227,.78),rgba(244,246,242,.35)),
        var(--paper);
      border-bottom:1px solid var(--line);
    }
    .breadcrumbs{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
      color:var(--muted);
      font-size:13px;
      margin-bottom:24px;
    }
    .breadcrumbs a:hover{color:var(--accent)}
    .page-intro h1{
      max-width:780px;
      margin:0 0 18px;
      color:var(--deep);
      font-size:clamp(38px,5vw,64px);
      line-height:1.18;
      letter-spacing:-.035em;
    }
    .page-intro p{max-width:760px;margin:0;color:#586862;font-size:17px}
    .meta-strip{
      background:var(--deep);
      color:#fff;
      padding:25px 0;
    }
    .meta-grid{display:grid;grid-template-columns:repeat(4,1fr)}
    .meta-item{padding:0 24px;border-left:1px solid rgba(255,255,255,.18)}
    .meta-item:first-child{border-left:0;padding-left:0}
    .meta-item b{display:block;font-size:16px;margin-bottom:3px}
    .meta-item span{color:#bdd0c7;font-size:13px}
    .scene-directory{padding-top:78px}
    .scene-list{border-top:1px solid var(--line)}
    .scene-row{
      display:grid;
      grid-template-columns:68px 1.05fr 1.25fr 150px;
      gap:28px;
      align-items:center;
      padding:30px 0;
      border-bottom:1px solid var(--line);
      transition:.25s ease;
    }
    .scene-row:hover{
      padding-left:14px;
      padding-right:14px;
      background:#edf3ee;
    }
    .scene-no{font-size:14px;color:var(--accent);font-weight:800}
    .scene-row h3{margin:0 0 7px;color:var(--deep);font-size:24px}
    .scene-row p{margin:0;color:var(--muted);font-size:14px}
    .scene-detail{display:flex;flex-wrap:wrap;gap:8px}
    .tag{
      display:inline-flex;
      align-items:center;
      font-size:12px;
      border:1px solid #c7d6cf;
      color:#597068;
      padding:4px 10px;
      border-radius:20px;
      background:#f8faf7;
    }
    .scene-link{text-align:right;color:var(--accent);font-weight:700}
    .scene-link:hover{color:var(--deep)}
    .feature-panel{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:0;
      background:var(--deep);
      border-radius:var(--radius);
      overflow:hidden;
      box-shadow:var(--shadow);
    }
    .feature-copy{padding:48px;color:#fff}
    .feature-copy h2{font-size:clamp(30px,4vw,48px);line-height:1.25;margin:16px 0 15px}
    .feature-copy p{color:#c8d8d0;max-width:520px}
    .feature-copy .tag{color:#d7e9df;border-color:#759989;background:transparent}
    .feature-visual{
      min-height:350px;
      position:relative;
      background:#d6e8de;
      overflow:hidden;
    }
    .device-frame{
      position:absolute;
      width:240px;
      height:300px;
      right:15%;
      top:28px;
      border:10px solid var(--deep-2);
      border-radius:25px;
      background:#f4f6f2;
      box-shadow:18px 20px 0 rgba(32,54,48,.13);
      transform:rotate(7deg);
    }
    .device-frame:before{
      content:"";
      position:absolute;
      left:20px;
      right:20px;
      top:28px;
      height:12px;
      border-radius:8px;
      background:var(--accent);
      box-shadow:0 30px 0 #c7ddd1,0 60px 0 #c7ddd1,0 90px 0 #c7ddd1;
    }
    .circuit{
      position:absolute;
      width:180px;
      height:180px;
      left:10%;
      bottom:-48px;
      border:1px solid rgba(62,139,118,.4);
      border-radius:50%;
    }
    .circuit:before,.circuit:after{
      content:"";
      position:absolute;
      inset:23px;
      border:1px solid rgba(62,139,118,.4);
      border-radius:50%;
    }
    .circuit:after{inset:52px;border-color:rgba(184,117,66,.6)}
    .mapping{background:#e8eee9}
    .mapping-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:16px;
    }
    .mapping-card{
      background:var(--white);
      border:1px solid var(--line);
      border-radius:12px;
      padding:25px;
      min-height:190px;
      transition:.25s ease;
    }
    .mapping-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b7cec1}
    .mapping-card .index{
      color:var(--accent);
      font-weight:800;
      font-size:13px;
    }
    .mapping-card h3{margin:18px 0 8px;color:var(--deep);font-size:20px}
    .mapping-card p{margin:0;color:var(--muted);font-size:14px}
    .process-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:72px;align-items:start}
    .process-copy h2{margin:0 0 16px;color:var(--deep);font-size:38px;line-height:1.3}
    .process-copy p{color:var(--muted)}
    .process-list{border-top:1px solid var(--line)}
    .process-item{
      display:grid;
      grid-template-columns:44px 1fr;
      gap:18px;
      padding:20px 0;
      border-bottom:1px solid var(--line);
    }
    .process-item b{
      width:34px;
      height:34px;
      display:grid;
      place-items:center;
      color:#fff;
      background:var(--accent-2);
      border-radius:50%;
      font-size:13px;
    }
    .process-item h3{margin:0 0 4px;color:var(--deep);font-size:18px}
    .process-item p{margin:0;color:var(--muted);font-size:14px}
    .support-band{background:#dcece3}
    .support-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .support-item{
      border-left:3px solid var(--accent);
      padding:20px 19px;
      background:rgba(255,255,255,.52);
    }
    .support-item strong{display:block;color:var(--deep);font-size:17px;margin-bottom:5px}
    .support-item span{color:#5b6c64;font-size:13px}
    .faq-wrap{max-width:850px}
    .faq-item{border-top:1px solid var(--line)}
    .faq-item:last-child{border-bottom:1px solid var(--line)}
    .faq-item summary{
      list-style:none;
      cursor:pointer;
      padding:21px 40px 21px 0;
      position:relative;
      color:var(--deep);
      font-weight:700;
      font-size:17px;
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{
      content:"+";
      position:absolute;
      right:4px;
      top:17px;
      color:var(--accent);
      font-size:25px;
      font-weight:400;
    }
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{padding:0 45px 22px 0;color:var(--muted);font-size:14px}
    .cta-section{padding:70px 0}
    .cta-box{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:30px;
      padding:38px 44px;
      background:var(--deep-2);
      color:#fff;
      border-radius:var(--radius);
    }
    .cta-box h2{margin:0 0 8px;font-size:30px}
    .cta-box p{margin:0;color:#c6d6ce}
    .cta-box .btn{background:var(--accent);color:#fff}
    .cta-box .btn:hover{background:#d08c57;transform:translateY(-2px)}
    .site-footer{background:#182a25;color:#c6d4ce;padding:55px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:36px}
    .footer-brand .logo{color:#fff;margin-bottom:15px}
    .footer-brand p{max-width:330px;margin:0;color:#9fb4aa;font-size:13px}
    .footer-title{color:#fff;font-weight:700;margin-bottom:15px}
    .footer-links{display:grid;gap:8px}
    .footer-links a{color:#9fb4aa;font-size:13px}
    .footer-links a:hover{color:#e7b17f}
    .copyright{
      display:flex;
      justify-content:space-between;
      gap:20px;
      border-top:1px solid rgba(255,255,255,.12);
      margin-top:42px;
      padding-top:18px;
      color:#82988e;
      font-size:12px;
    }
    @media (max-width:1024px){
      .nav-links{gap:13px}
      .nav-links a{font-size:13px}
      .scene-row{grid-template-columns:50px 1fr 1fr 110px;gap:18px}
      .feature-panel,.process-grid{gap:35px}
    }
    @media (max-width:768px){
      .container{width:min(var(--max),calc(100% - 34px))}
      .section{padding:66px 0}
      .section-head{display:block;margin-bottom:27px}
      .section-head .lead{margin-top:13px}
      .menu-toggle{display:block}
      .nav-links{
        display:none;
        position:absolute;
        top:76px;
        left:0;
        right:0;
        padding:12px 17px 20px;
        background:#fafbf8;
        border-bottom:1px solid var(--line);
        box-shadow:var(--shadow);
      }
      .nav-links.open{display:grid;gap:0}
      .nav-links a{padding:12px 0}
      .nav-links a.active:after{bottom:7px;right:auto;width:28px}
      .nav-action{text-align:center;margin-top:8px}
      .page-intro{padding:55px 0 45px}
      .page-intro h1{font-size:42px}
      .meta-grid{grid-template-columns:1fr 1fr;gap:22px 0}
      .meta-item:nth-child(3){border-left:0;padding-left:0}
      .meta-item:nth-child(3),.meta-item:nth-child(4){margin-top:4px}
      .scene-row{grid-template-columns:40px 1fr;gap:5px 15px}
      .scene-detail{grid-column:2}
      .scene-link{text-align:left;grid-column:2;margin-top:4px}
      .feature-panel,.process-grid{grid-template-columns:1fr}
      .feature-visual{min-height:280px}
      .mapping-grid{grid-template-columns:1fr 1fr}
      .support-grid{grid-template-columns:1fr 1fr}
      .cta-box{display:block;padding:31px 26px}
      .cta-box .btn{margin-top:22px}
      .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }
    @media (max-width:520px){
      .logo strong{font-size:15px}
      .logo small{font-size:10px}
      .page-intro h1{font-size:34px}
      .page-intro p{font-size:15px}
      .meta-grid,.mapping-grid,.support-grid{grid-template-columns:1fr}
      .meta-item{border-left:0;padding-left:0}
      .scene-row h3{font-size:21px}
      .feature-copy{padding:32px 25px}
      .device-frame{right:18%;transform:rotate(5deg) scale(.88);transform-origin:center}
      .process-copy h2{font-size:30px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
      .copyright{display:block}
      .copyright span{display:block;margin-top:5px}
    }

/* roulang page: category3 */
:root{
      --ink:#182421;
      --deep:#203630;
      --deep-2:#29463d;
      --muted:#66736f;
      --line:#d9e1dc;
      --paper:#f4f6f2;
      --white:#fff;
      --mint:#dcece3;
      --accent:#b87542;
      --accent-2:#3e8b76;
      --radius:14px;
      --shadow:0 14px 36px rgba(28,48,41,.08);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--paper);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.75;
      font-size:15px;
    }
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.25}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .section{padding:88px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:34px}
    .section-head h2{font-size:clamp(28px,3.4vw,42px);color:var(--deep);margin-bottom:0}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.08em;margin-bottom:14px}
    .eyebrow:before{content:"";width:26px;height:2px;background:var(--accent)}
    .lead{color:var(--muted);max-width:620px;margin-bottom:0}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;border-radius:8px;padding:12px 21px;font-weight:700;min-height:46px}
    .btn-primary{background:var(--deep);color:#fff}
    .btn-primary:hover{background:var(--accent-2);transform:translateY(-2px)}
    .btn-outline{border-color:#b8c9c0;color:var(--deep)}
    .btn-outline:hover{border-color:var(--deep);background:var(--mint)}
    .btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(184,117,66,.38);outline-offset:3px}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(250,251,248,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .navbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--deep);font-weight:800;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border:2px solid var(--accent);border-radius:9px;position:relative}
    .logo-mark:after,.logo-mark:before{content:"";position:absolute;background:var(--accent-2)}
    .logo-mark:before{width:15px;height:2px;left:8px;top:10px;box-shadow:0 7px 0 var(--accent-2)}
    .logo-mark:after{width:2px;height:15px;left:15px;top:8px}
    .logo strong{font-size:17px}
    .logo small{display:block;color:var(--muted);font-size:11px;font-weight:500}
    .nav-links{display:flex;align-items:center;gap:22px}
    .nav-links a{position:relative;color:#52615c;font-size:14px;padding:26px 0}
    .nav-links a:hover,.nav-links a.active{color:var(--deep)}
    .nav-links a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;background:var(--accent)}
    .nav-action{padding:9px 15px!important;background:var(--accent);color:#fff!important;border-radius:7px}
    .nav-action:hover{background:var(--deep)!important}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--deep);font-size:25px}
    .page-head{padding:72px 0 64px;background:linear-gradient(120deg,#eef3ee,#dce9e0);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:26px}
    .breadcrumb a:hover{color:var(--accent)}
    .breadcrumb span{color:#a0ada7}
    .page-head h1{font-size:clamp(36px,5vw,64px);color:var(--deep);max-width:780px;margin-bottom:18px}
    .page-head p{color:#596963;max-width:700px;font-size:17px;margin-bottom:0}
    .meta-strip{background:var(--deep);color:#fff;padding:26px 0}
    .meta-grid{display:grid;grid-template-columns:repeat(4,1fr)}
    .meta-item{padding:4px 25px;border-left:1px solid rgba(255,255,255,.17)}
    .meta-item:first-child{border-left:0}
    .meta-item b{display:block;font-size:16px;margin-bottom:3px}
    .meta-item span{color:#c2d2ca;font-size:13px}
    .featured{display:grid;grid-template-columns:1.2fr .8fr;gap:26px;align-items:stretch}
    .feature-panel{min-height:330px;padding:36px;border-radius:var(--radius);background:var(--deep);color:#fff;display:flex;flex-direction:column;justify-content:end;position:relative;overflow:hidden}
    .feature-panel:after{content:"";position:absolute;width:230px;height:230px;border:1px solid rgba(220,236,227,.25);border-radius:50%;right:-55px;top:-70px;box-shadow:0 0 0 24px rgba(220,236,227,.05),0 0 0 48px rgba(220,236,227,.04)}
    .feature-panel>*{position:relative;z-index:1}
    .tag{display:inline-flex;width:max-content;font-size:12px;border:1px solid #c7d6cf;color:#597068;padding:3px 10px;border-radius:20px;background:#f8faf7}
    .feature-panel .tag{border-color:#6d9787;color:#d9ebe1;background:transparent}
    .feature-panel h2{font-size:32px;max-width:580px;margin:18px 0 12px}
    .feature-panel p{color:#c5d7ce;max-width:580px;margin-bottom:20px}
    .feature-link{color:#efbd8c;font-weight:700}
    .feature-link:hover{color:#fff}
    .feature-side{padding:31px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .feature-side h3{color:var(--deep);font-size:22px;margin-bottom:19px}
    .side-list{list-style:none;margin:0;padding:0}
    .side-list li{padding:16px 0;border-top:1px solid var(--line)}
    .side-list li:first-child{border-top:0;padding-top:0}
    .side-list time{color:var(--accent);font-size:12px;font-weight:700;display:block}
    .side-list a{font-weight:700;color:var(--deep)}
    .side-list a:hover{color:var(--accent-2)}
    .filter-bar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:18px 22px;border:1px solid var(--line);background:#fff;border-radius:10px;margin-bottom:28px}
    .filter-title{font-weight:700;color:var(--deep)}
    .filter-list{display:flex;gap:8px;flex-wrap:wrap}
    .filter-list span{padding:6px 12px;border-radius:20px;background:var(--mint);color:var(--deep);font-size:13px}
    .news-stream{border-top:1px solid var(--line)}
    .news-row{display:grid;grid-template-columns:118px 1fr 125px;gap:25px;align-items:center;padding:25px 0;border-bottom:1px solid var(--line);transition:.25s}
    .news-row:hover{padding-left:14px;background:#edf3ee}
    .news-date{color:var(--accent);font-weight:700;font-size:13px}
    .news-date small{display:block;color:var(--muted);font-weight:500;margin-top:4px}
    .news-row h3{font-size:21px;color:var(--deep);margin-bottom:7px}
    .news-row p{font-size:14px;color:var(--muted);margin-bottom:0;max-width:690px}
    .news-type{justify-self:end;text-align:right}
    .news-type .tag{margin-bottom:8px}
    .read-link{display:block;color:var(--accent);font-weight:700;font-size:13px}
    .support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .support-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.25s}
    .support-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9cec2}
    .support-no{color:var(--accent);font-weight:800;font-size:13px}
    .support-card h3{font-size:21px;color:var(--deep);margin:13px 0 8px}
    .support-card p{color:var(--muted);font-size:14px;margin-bottom:0}
    .faq-wrap{max-width:860px;margin:auto}
    .faq-item{border-top:1px solid var(--line)}
    .faq-item:last-child{border-bottom:1px solid var(--line)}
    .faq-question{width:100%;border:0;background:transparent;text-align:left;padding:21px 4px;color:var(--deep);font-weight:700;display:flex;justify-content:space-between;gap:20px}
    .faq-question span:last-child{color:var(--accent);font-size:20px;line-height:1}
    .faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 35px 21px 4px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
    .cta-band{padding:48px 0;background:var(--deep-2);color:#fff}
    .cta-content{display:flex;justify-content:space-between;align-items:center;gap:30px}
    .cta-content h2{font-size:30px;margin-bottom:8px}
    .cta-content p{color:#c8d8d0;margin-bottom:0}
    .cta-band .btn{background:#e2b184;color:var(--deep)}
    .cta-band .btn:hover{background:#fff}
    .site-footer{background:#172722;color:#dce8e2;padding:58px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px}
    .footer-brand .logo{color:#fff;margin-bottom:18px}
    .footer-brand p{color:#aebfb6;max-width:310px;font-size:13px}
    .footer-title{font-weight:700;color:#fff;margin-bottom:15px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{color:#aebfb6;font-size:13px}
    .footer-links a:hover{color:#e2b184}
    .copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:43px;padding-top:17px;display:flex;justify-content:space-between;gap:20px;color:#8fa39a;font-size:12px}
    @media(max-width:1024px){
      .nav-links{gap:13px}
      .nav-links a{font-size:13px}
      .featured{grid-template-columns:1fr}
      .support-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(var(--max),calc(100% - 34px))}
      .navbar{height:68px}
      .menu-toggle{display:block}
      .nav-links{display:none;position:absolute;top:68px;left:0;right:0;padding:15px 17px 22px;background:#fafbf8;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:0}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 4px}
      .nav-links a.active:after{bottom:4px;right:auto;width:32px}
      .nav-action{text-align:center;margin-top:8px}
      .section{padding:66px 0}
      .section-head{display:block;margin-bottom:26px}
      .section-head .lead{margin-top:14px}
      .meta-grid{grid-template-columns:repeat(2,1fr);gap:18px}
      .meta-item:nth-child(3){border-left:0}
      .news-row{grid-template-columns:86px 1fr}
      .news-type{grid-column:2;justify-self:start;text-align:left}
      .cta-content{display:block}
      .cta-content .btn{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:6px}
    }
    @media(max-width:520px){
      .logo small{display:none}
      .page-head{padding:52px 0 48px}
      .page-head h1{font-size:38px}
      .meta-grid{grid-template-columns:1fr}
      .meta-item{border-left:0;border-top:1px solid rgba(255,255,255,.17);padding:14px 0 0}
      .meta-item:first-child{border-top:0;padding-top:0}
      .filter-bar{display:block}
      .filter-list{margin-top:12px}
      .feature-panel{padding:27px;min-height:310px}
      .feature-panel h2{font-size:27px}
      .news-row{display:block;padding:23px 0}
      .news-date{margin-bottom:9px}
      .news-type{margin-top:13px}
      .support-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }

/* roulang page: category4 */
:root{
      --ink:#182421;--deep:#203630;--deep-2:#29463d;--muted:#66736f;--line:#d9e1dc;
      --paper:#f4f6f2;--white:#fff;--mint:#dcece3;--accent:#b87542;--accent-2:#3e8b76;
      --radius:14px;--shadow:0 14px 36px rgba(28,48,41,.08);--max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none;transition:.25s ease}
    img{display:block;max-width:100%}
    button,input,textarea,select{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--max),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(250,251,248,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
    .navbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .logo{display:flex;align-items:center;gap:11px;color:var(--deep);font-weight:800;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border:2px solid var(--accent);border-radius:9px;position:relative}
    .logo-mark:after,.logo-mark:before{content:"";position:absolute;background:var(--accent-2)}
    .logo-mark:before{width:15px;height:2px;left:8px;top:10px;box-shadow:0 7px 0 var(--accent-2)}
    .logo-mark:after{width:2px;height:15px;left:15px;top:8px}
    .logo strong{font-size:17px}.logo small{display:block;color:var(--muted);font-size:11px;font-weight:500}
    .nav-links{display:flex;align-items:center;gap:22px}
    .nav-links a{position:relative;color:#52615c;font-size:14px;padding:26px 0}
    .nav-links a:hover,.nav-links a.active{color:var(--deep)}
    .nav-links a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;background:var(--accent)}
    .nav-action{padding:9px 15px!important;background:var(--accent);color:#fff!important;border-radius:7px}
    .nav-action:hover{background:var(--deep)!important}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--deep);font-size:25px}
    .page-head{padding:66px 0 52px;background:linear-gradient(115deg,#f4f6f2,#e6f0e9);border-bottom:1px solid var(--line)}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.08em}
    .eyebrow:before{content:"";width:26px;height:2px;background:var(--accent)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(38px,5vw,64px);line-height:1.18;color:var(--deep);margin:17px 0 17px;max-width:760px}
    h2{font-size:clamp(27px,3vw,40px);line-height:1.25;color:var(--deep);margin-bottom:14px}
    h3{color:var(--deep);line-height:1.35}
    .page-intro{max-width:680px;color:var(--muted);font-size:17px}
    .crumbs{font-size:13px;color:var(--muted);margin-bottom:24px}
    .crumbs a:hover{color:var(--accent)}
    .section{padding:84px 0}
    .section-head{display:flex;justify-content:space-between;gap:32px;align-items:end;margin-bottom:34px}
    .lead{color:var(--muted);max-width:590px}
    .info-band{background:var(--deep);color:#fff;padding:25px 0}
    .info-grid{display:grid;grid-template-columns:repeat(4,1fr)}
    .info-item{padding:5px 25px;border-left:1px solid rgba(255,255,255,.18)}
    .info-item:first-child{border:0}
    .info-item b{display:block;font-size:16px}.info-item span{font-size:13px;color:#b9cbc2}
    .app-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}
    .device-stage{min-height:390px;border:1px solid #cbdcd2;border-radius:18px;background:#e5f0e9;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
    .device-stage:before,.device-stage:after{content:"";position:absolute;border:1px solid rgba(62,139,118,.28);border-radius:50%}
    .device-stage:before{width:340px;height:340px}.device-stage:after{width:230px;height:230px}
    .device{position:relative;z-index:1;width:190px;height:350px;padding:10px;border:7px solid var(--deep);border-radius:28px;background:#fff;box-shadow:0 18px 28px rgba(32,54,48,.18)}
    .device-screen{height:100%;border-radius:17px;background:linear-gradient(160deg,#dcece3,#f8faf7);padding:27px 15px}
    .screen-top{height:9px;width:60px;background:var(--accent);border-radius:8px;margin-bottom:28px}
    .screen-line{height:12px;background:#a7c4b5;border-radius:4px;margin:12px 0}.screen-line.short{width:62%}
    .screen-card{height:92px;background:#fff;border:1px solid #d4e2da;border-radius:10px;margin-top:24px;padding:13px}
    .screen-card i{display:block;width:30px;height:30px;background:var(--accent-2);border-radius:8px;margin-bottom:12px}
    .download-box{padding:8px 0}.download-box h2{font-size:32px}
    .download-box p{color:var(--muted);max-width:520px}
    .download-meta{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:28px 0;padding:17px 0;gap:18px}
    .download-meta span{display:block;color:var(--muted);font-size:13px}.download-meta b{color:var(--deep)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;border-radius:8px;padding:12px 21px;font-weight:700;min-height:46px}
    .btn-primary{background:var(--deep);color:#fff}.btn-primary:hover{background:var(--accent-2);transform:translateY(-2px)}
    .btn-outline{border-color:#b8c9c0;color:var(--deep)}.btn-outline:hover{border-color:var(--deep);background:var(--mint)}
    .btn:focus-visible,a:focus-visible{outline:3px solid rgba(184,117,66,.38);outline-offset:3px}
    .module-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .module-card{padding:25px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);min-height:160px;transition:.25s}
    .module-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#b9d0c4}
    .module-index{color:var(--accent);font-weight:800;font-size:13px}
    .module-card h3{font-size:20px;margin:12px 0 7px}.module-card p{color:var(--muted);font-size:14px;margin:0}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
    .step{background:var(--paper);padding:28px;min-height:190px}.step-num{font-size:32px;font-weight:800;color:var(--accent)}
    .step h3{margin:12px 0 7px}.step p{color:var(--muted);font-size:14px;margin:0}
    .update-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:start}
    .update-list{border-top:1px solid var(--line)}.update-item{padding:20px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:20px}
    .update-item b{color:var(--deep)}.update-item span{color:var(--muted);font-size:13px;white-space:nowrap}
    .note-box{padding:28px;background:var(--mint);border-left:3px solid var(--accent-2);border-radius:0 12px 12px 0}
    .note-box p{color:#52655d;margin:0;font-size:14px}
    .faq-list{border-top:1px solid var(--line)}
    .faq-item{border-bottom:1px solid var(--line)}.faq-item summary{cursor:pointer;list-style:none;padding:21px 4px;font-weight:700;color:var(--deep);display:flex;justify-content:space-between}
    .faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";color:var(--accent);font-size:22px;font-weight:400}
    .faq-item[open] summary:after{content:"−"}.faq-answer{padding:0 34px 22px 4px;color:var(--muted);font-size:14px}
    .cta{background:var(--deep);color:#fff;padding:48px 0}.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}.cta h2{color:#fff;margin:0 0 7px;font-size:30px}.cta p{color:#c5d7ce;margin:0}
    .site-footer{background:#172822;color:#d8e4de;padding-top:55px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px;padding-bottom:42px}
    .footer-brand p{color:#aebfb6;max-width:290px;font-size:13px;margin-top:18px}.footer-brand .logo{color:#fff}
    .footer-title{font-weight:700;color:#fff;margin-bottom:14px}.footer-links{display:grid;gap:8px}.footer-links a{color:#aebfb6;font-size:13px}.footer-links a:hover{color:#e4b081}
    .copyright{border-top:1px solid rgba(255,255,255,.14);padding:18px 0;display:flex;justify-content:space-between;gap:20px;color:#91a69c;font-size:12px}
    @media(max-width:1024px){.nav-links{gap:13px}.app-panel,.update-layout{gap:35px}.container{width:min(var(--max),calc(100% - 36px))}}
    @media(max-width:768px){.nav-links{display:none;position:absolute;top:76px;left:0;right:0;background:#fafbf8;border-bottom:1px solid var(--line);padding:12px 24px 20px;flex-direction:column;align-items:stretch;gap:0}.nav-links.open{display:flex}.nav-links a{padding:12px 0}.nav-links a.active:after{bottom:5px}.nav-action{text-align:center;margin-top:8px}.menu-toggle{display:block}.info-grid{grid-template-columns:1fr 1fr;gap:18px}.info-item{border-left:0;padding:4px 0}.section{padding:64px 0}.app-panel,.update-layout{grid-template-columns:1fr}.device-stage{min-height:330px}.steps{grid-template-columns:1fr}.module-grid{grid-template-columns:1fr}.cta-inner{align-items:flex-start;flex-direction:column}.footer-grid{grid-template-columns:1fr 1fr}.copyright{flex-direction:column;gap:4px}}
    @media(max-width:520px){.container{width:calc(100% - 30px)}.navbar{height:68px}.site-header .nav-links{top:68px}.page-head{padding:45px 0 38px}h1{font-size:38px}.page-intro{font-size:15px}.section-head{display:block}.section-head .lead{margin-top:12px}.download-meta{grid-template-columns:1fr}.device{transform:scale(.88)}.footer-grid{grid-template-columns:1fr}.copyright{font-size:11px}}