/* roulang page: index */
:root{
  --ink:#201d24;
  --ink-soft:#514b55;
  --muted:#817982;
  --paper:#f7f5f1;
  --white:#fffdfa;
  --line:#e5dfd7;
  --accent:#f3a53b;
  --accent-deep:#c87916;
  --mint:#c6e3d4;
  --purple:#4b3b51;
  --shadow:0 18px 45px rgba(39,31,35,.09);
  --radius:18px;
  --container:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,241,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,223,215,.8)}
.navbar{height:78px;display:flex;align-items:center;gap:34px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;white-space:nowrap}
.logo-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-size:17px;font-weight:900;position:relative}
.logo-mark:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:var(--accent);right:-3px;top:-3px;border:2px solid var(--paper)}
.logo span{font-size:16px}
.nav-links{display:flex;align-items:center;gap:7px;margin-left:auto}
.nav-links a{padding:9px 14px;border-radius:9px;color:var(--ink-soft);transition:.2s ease}
.nav-links a:hover,.nav-links a.active{color:var(--ink);background:#ebe6df}
.nav-links a.active{font-weight:700}
.nav-action{background:var(--accent);padding:11px 18px;border-radius:10px;font-weight:750;transition:.2s ease}
.nav-action:hover{background:#ffb957;transform:translateY(-2px)}
.menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
.hero{padding:92px 0 78px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:72px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-deep);font-weight:800;font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:20px}
.eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
h1,h2,h3{line-height:1.22;letter-spacing:-.04em}
h1{font-size:clamp(38px,5vw,68px);max-width:680px}
.hero-copy{font-size:18px;color:var(--ink-soft);max-width:610px;margin:26px 0 32px}
.actions{display:flex;gap:13px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:11px;font-weight:750;border:1px solid transparent;transition:.2s ease}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:#3b343e;transform:translateY(-2px);box-shadow:0 8px 20px rgba(32,29,36,.18)}
.btn-secondary{border-color:#cfc7bd;background:transparent;color:var(--ink)}
.btn-secondary:hover{border-color:var(--ink);background:var(--white)}
.hero-note{display:flex;gap:22px;margin-top:34px;color:var(--muted);font-size:13px}
.hero-note strong{display:block;color:var(--ink);font-size:18px;line-height:1.3}
.device-stage{min-height:405px;background:var(--purple);border-radius:28px;padding:28px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
.device-stage:before,.device-stage:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.12);border-radius:50%;width:330px;height:330px;right:-100px;top:-90px}
.device-stage:after{width:180px;height:180px;right:50px;top:70px}
.device-label{position:relative;z-index:1;color:#eadfe8;font-size:13px}
.phone{position:absolute;z-index:2;left:50%;top:37px;transform:translateX(-50%) rotate(5deg);width:218px;height:365px;border:7px solid #17131a;border-radius:31px;background:#f8f2e8;box-shadow:20px 22px 28px rgba(0,0,0,.25);padding:15px}
.phone-top{height:9px;width:64px;border-radius:8px;background:#302b34;margin:0 auto 25px}
.app-head{display:flex;align-items:center;gap:10px;border-bottom:1px solid #ded5ca;padding-bottom:18px}
.app-icon{width:37px;height:37px;border-radius:11px;background:var(--accent);display:grid;place-items:center;font-weight:900}
.app-head b{font-size:13px}
.app-head small{display:block;color:#847a76;font-size:10px}
.phone-panel{margin-top:20px;background:#fff;border:1px solid #e3d9ce;border-radius:13px;padding:13px}
.phone-panel span{display:block;color:#9b9189;font-size:10px}
.phone-panel strong{font-size:21px;display:block;margin-top:3px}
.phone-lines{margin-top:18px;display:grid;gap:10px}
.phone-lines i{height:9px;background:#e8dfd4;border-radius:8px;display:block}
.phone-lines i:nth-child(2){width:72%}
.phone-lines i:nth-child(3){width:88%}
.stage-badge{position:absolute;right:28px;bottom:40px;background:var(--accent);color:var(--ink);padding:11px 14px;border-radius:12px;font-size:12px;font-weight:800;z-index:3}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:34px}
.section-head h2{font-size:clamp(28px,3.2vw,43px)}
.section-head p{color:var(--muted);max-width:500px}
.quick-nav{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);background:var(--white);border-radius:16px;overflow:hidden}
.quick-item{padding:24px 25px;border-right:1px solid var(--line);transition:.2s}
.quick-item:last-child{border:0}
.quick-item:hover{background:#fff6e8}
.quick-item .num{color:var(--accent-deep);font-size:12px;font-weight:800}
.quick-item h3{font-size:19px;margin:8px 0 5px}
.quick-item p{font-size:13px;color:var(--muted)}
.arrow{float:right;font-size:20px;color:var(--accent-deep)}
.download-panel{background:var(--ink);color:#fff;padding:48px;border-radius:22px;display:grid;grid-template-columns:1fr 1fr;gap:45px;align-items:center}
.download-panel p{color:#c8c0c7;margin:18px 0 25px}
.download-panel h2{font-size:38px}
.download-meta{display:flex;gap:14px;flex-wrap:wrap;color:#ddd2d6;font-size:13px}
.download-meta span{border:1px solid #5b515d;padding:6px 10px;border-radius:7px}
.download-panel .btn-primary{background:var(--accent);color:var(--ink)}
.download-panel .btn-primary:hover{background:#ffbc61}
.download-card{background:#302933;border:1px solid #5a4e5c;border-radius:17px;padding:26px}
.download-card h3{font-size:24px;margin-bottom:17px}
.download-row{display:flex;justify-content:space-between;border-bottom:1px solid #504651;padding:12px 0;color:#cfc4ca}
.download-row strong{color:#fff}
.qr{width:88px;height:88px;background:repeating-linear-gradient(45deg,#fff 0 5px,#29232c 5px 9px);border:7px solid #fff;border-radius:5px;margin-top:18px}
.steps{display:grid;grid-template-columns:1.15fr 1fr;gap:70px;align-items:center}
.step-list{display:grid;gap:0}
.step{display:grid;grid-template-columns:52px 1fr;gap:18px;padding:21px 0;border-bottom:1px solid var(--line)}
.step-number{width:38px;height:38px;border-radius:50%;background:var(--mint);display:grid;place-items:center;font-weight:900}
.step h3{font-size:18px;margin-bottom:4px}
.step p,.muted{color:var(--muted);font-size:14px}
.route-board{background:#ede8e0;border-radius:20px;padding:31px;min-height:280px;position:relative}
.route-board h3{font-size:27px;max-width:270px}
.route-line{position:absolute;left:32px;right:32px;bottom:58px;height:2px;background:#b6aa9d}
.route-point{position:absolute;bottom:45px;width:26px;height:26px;border-radius:50%;background:var(--accent);border:6px solid #ede8e0;box-shadow:0 0 0 1px #b6aa9d}
.route-point:nth-of-type(1){left:30px}.route-point:nth-of-type(2){left:45%}.route-point:nth-of-type(3){right:30px}
.news-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}
.feature-news{background:var(--purple);color:#fff;border-radius:18px;padding:32px;min-height:275px;display:flex;flex-direction:column;justify-content:end}
.feature-news .tag{color:var(--accent)}
.feature-news h3{font-size:29px;margin:12px 0}
.feature-news p{color:#d5cad3;font-size:14px}
.tag{display:inline-block;font-size:12px;font-weight:800;color:var(--accent-deep);letter-spacing:.04em}
.news-list{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:8px 24px}
.news-item{display:block;padding:18px 0;border-bottom:1px solid var(--line);transition:.2s}
.news-item:last-child{border:0}
.news-item:hover{padding-left:7px}
.news-item time{font-size:12px;color:var(--muted)}
.news-item h3{font-size:17px;margin:3px 0}
.empty-state{padding:42px 20px;text-align:center;color:var(--muted)}
.timeline{border-left:2px solid #d8cfc5;margin-left:12px;padding-left:33px}
.timeline-item{position:relative;padding:0 0 29px}
.timeline-item:before{content:"";position:absolute;left:-42px;top:8px;width:14px;height:14px;background:var(--accent);border:4px solid var(--paper);border-radius:50%;box-shadow:0 0 0 1px var(--accent)}
.timeline-item time{font-size:12px;color:var(--accent-deep);font-weight:800}
.timeline-item h3{font-size:19px;margin:5px 0}
.notice-bar{background:#e9dfd5;border-left:5px solid var(--accent-deep);padding:22px 26px;border-radius:10px;display:flex;justify-content:space-between;gap:20px;align-items:center}
.notice-bar strong{font-size:19px}
.guide-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
.guide-card{padding:23px;background:var(--white);border:1px solid var(--line);border-radius:14px}
.guide-card b{font-size:31px;color:var(--accent-deep);display:block;margin-bottom:15px}
.guide-card h3{font-size:18px;margin-bottom:7px}
.account-area{display:grid;grid-template-columns:.8fr 1.2fr;gap:22px}
.account-intro{background:var(--mint);border-radius:18px;padding:33px}
.account-intro h2{font-size:32px;margin:12px 0}
.service-list{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:12px 28px}
.service-row{display:flex;align-items:center;justify-content:space-between;padding:17px 0;border-bottom:1px solid var(--line)}
.service-row:last-child{border:0}
.service-row span{color:var(--muted);font-size:13px}
.security{border:1px solid #d7cec4;background:var(--white);border-radius:18px;padding:30px;display:grid;grid-template-columns:90px 1fr;gap:25px;align-items:center}
.shield{width:72px;height:84px;background:var(--accent);clip-path:polygon(50% 0,92% 16%,84% 68%,50% 100%,16% 68%,8% 16%);display:grid;place-items:center;font-size:26px}
.security h2{font-size:27px;margin-bottom:8px}
.checks{display:flex;gap:26px;flex-wrap:wrap;margin-top:16px;color:var(--ink-soft);font-size:14px}
.checks span:before{content:"✓";color:var(--accent-deep);font-weight:900;margin-right:7px}
.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:55px}
.faq-grid h2{font-size:36px}
.faq-list details{background:var(--white);border:1px solid var(--line);border-radius:11px;margin-bottom:10px;padding:17px 20px}
.faq-list summary{cursor:pointer;font-weight:750;list-style:none;display:flex;justify-content:space-between}
.faq-list summary:after{content:"＋";color:var(--accent-deep)}
.faq-list details[open] summary:after{content:"－"}
.faq-list p{color:var(--muted);padding:13px 22px 2px 0;font-size:14px}
.support{background:#e8e0d9;border-radius:22px;padding:40px;display:grid;grid-template-columns:.85fr 1.15fr;gap:45px}
.support h2{font-size:36px;margin:10px 0}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:grid;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:13px;font-weight:700}
.field input,.field select,.field textarea{border:1px solid #d0c5ba;background:#fffdf9;border-radius:9px;padding:11px 13px;outline:none}
.field textarea{min-height:90px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--accent-deep);box-shadow:0 0 0 3px rgba(243,165,59,.2)}
.cta{background:var(--purple);color:#fff;border-radius:20px;padding:42px 48px;display:flex;align-items:center;justify-content:space-between;gap:25px}
.cta h2{font-size:34px}.cta p{color:#d5cad3;margin-top:8px}
.site-footer{background:#201d24;color:#d9d1d7;padding:58px 0 23px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:35px;padding-bottom:42px;border-bottom:1px solid #403940}
.footer-brand p{color:#9d929c;max-width:290px;margin-top:16px;font-size:13px}
.footer-title{color:#fff;font-weight:800;margin-bottom:14px}
.footer-links{display:grid;gap:8px;font-size:13px;color:#aaa0a8}
.footer-links a:hover{color:var(--accent)}
.copyright{display:flex;justify-content:space-between;gap:20px;color:#887e87;font-size:12px;padding-top:20px}
@media(max-width:1024px){
  .navbar{gap:15px}.nav-links a{padding:8px 8px}.hero-grid{gap:38px}
  .guide-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .container{width:min(100% - 32px,620px)}
  .navbar{height:68px}.nav-links{display:none;position:absolute;top:68px;left:16px;right:16px;background:var(--white);border:1px solid var(--line);padding:12px;border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
  .nav-links.open{display:flex}.nav-links a{text-align:center;padding:12px}.nav-action{margin-left:auto;padding:9px 12px;font-size:13px}.menu-toggle{display:block}
  .hero{padding:62px 0 55px}.hero-grid,.steps,.news-layout,.account-area,.faq-grid,.support{grid-template-columns:1fr;gap:30px}
  h1{font-size:43px}.hero-copy{font-size:16px}.device-stage{min-height:390px}
  .section{padding:62px 0}.section-head{display:block}.section-head p{margin-top:12px}
  .quick-nav{grid-template-columns:1fr 1fr}.quick-item:nth-child(2){border-right:0}.quick-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .download-panel{grid-template-columns:1fr;padding:30px}.download-panel h2{font-size:31px}
  .notice-bar{display:block}.notice-bar .btn{margin-top:16px}
  .security{grid-template-columns:1fr}.support{padding:30px}
  .footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:7px}
}
@media(max-width:520px){
  .logo span{font-size:14px}.nav-action{display:none}.hero h1{font-size:38px}
  .hero-note{gap:14px}.quick-nav,.guide-grid{grid-template-columns:1fr}.quick-item{border-right:0!important;border-bottom:1px solid var(--line)!important}.quick-item:last-child{border-bottom:0!important}
  .phone{transform:translateX(-50%) rotate(2deg);width:198px}.stage-badge{right:15px}
  .download-card{padding:20px}.section-tight{padding:45px 0}
  .form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}
  .cta{display:block;padding:31px 26px}.cta .btn{margin-top:20px;width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:1/-1}
}

/* roulang page: article */
:root{
      --ink:#201d24;
      --ink-soft:#514b55;
      --muted:#817982;
      --paper:#f7f5f1;
      --white:#fffdfa;
      --line:#e5dfd7;
      --accent:#f3a53b;
      --accent-deep:#c87916;
      --mint:#c6e3d4;
      --purple:#4b3b51;
      --shadow:0 18px 45px rgba(39,31,35,.09);
      --radius:18px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--paper);font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.75}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,241,.95);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,223,215,.86)}
    .navbar{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;white-space:nowrap}
    .logo-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-size:17px;font-weight:900;position:relative}
    .logo-mark:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:var(--accent);right:-3px;top:-3px;border:2px solid var(--paper)}
    .logo span{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:7px;margin-left:auto}
    .nav-links a{padding:9px 14px;border-radius:9px;color:var(--ink-soft);transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:#ebe6df}
    .nav-links a.active{font-weight:700}
    .nav-action{background:var(--accent);padding:11px 18px;border-radius:10px;font-weight:750;transition:.2s ease}
    .nav-action:hover{background:#ffb957;transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
    .article-hero{padding:78px 0 54px;border-bottom:1px solid var(--line)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-deep);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:18px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(34px,5vw,60px);line-height:1.2;letter-spacing:-1.8px;max-width:900px;margin-bottom:25px}
    .article-summary{max-width:760px;color:var(--ink-soft);font-size:18px;margin-bottom:28px}
    .article-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--muted);font-size:13px}
    .article-meta span{display:inline-flex;align-items:center;gap:6px}
    .tag{display:inline-block;color:var(--accent-deep);font-size:12px;font-weight:800;letter-spacing:.04em}
    .breadcrumb{padding:22px 0;color:var(--muted);font-size:13px}
    .breadcrumb a:hover{color:var(--ink)}
    .breadcrumb .current{color:var(--ink-soft);display:inline-block;max-width:55%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;vertical-align:bottom}
    .article-layout{display:grid;grid-template-columns:minmax(0,790px) 300px;gap:70px;align-items:start;padding:20px 0 84px}
    .article-content{background:var(--white);border:1px solid var(--line);border-radius:20px;padding:clamp(28px,5vw,58px);box-shadow:0 10px 30px rgba(39,31,35,.035);overflow:hidden}
    .article-content h2{font-size:28px;line-height:1.35;margin:38px 0 15px}
    .article-content h3{font-size:21px;line-height:1.45;margin:28px 0 12px}
    .article-content p{color:var(--ink-soft);margin-bottom:20px}
    .article-content ul,.article-content ol{color:var(--ink-soft);padding-left:24px;margin:18px 0 26px}
    .article-content li{margin:8px 0}
    .article-content blockquote{margin:28px 0;padding:20px 24px;border-left:4px solid var(--accent);background:#fff6e8;color:var(--ink-soft);border-radius:0 12px 12px 0}
    .article-content table{width:100%;border-collapse:collapse;margin:24px 0;border:1px solid var(--line)}
    .article-content th,.article-content td{padding:12px 14px;border:1px solid var(--line);text-align:left}
    .article-content th{background:#f3eee8;color:var(--ink)}
    .article-content a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:3px}
    .article-sidebar{position:sticky;top:104px;display:grid;gap:18px}
    .side-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:23px}
    .side-card.dark{background:var(--purple);color:#fff;border-color:var(--purple)}
    .side-card h3{font-size:18px;margin-bottom:14px}
    .side-card p{font-size:13px;color:var(--muted);margin-bottom:0}
    .side-card.dark p{color:#d9ced7}
    .info-list{display:grid;gap:0;margin:0;padding:0;list-style:none}
    .info-list li{display:flex;justify-content:space-between;gap:15px;padding:11px 0;border-bottom:1px solid var(--line);font-size:13px}
    .info-list li:last-child{border-bottom:0}
    .info-list span{color:var(--muted)}
    .info-list strong{text-align:right;font-weight:700}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 19px;border-radius:11px;font-weight:750;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#3b343e;transform:translateY(-2px);box-shadow:0 8px 20px rgba(32,29,36,.18)}
    .btn-secondary{border-color:#cfc7bd;background:transparent;color:var(--ink)}
    .btn-secondary:hover{border-color:var(--ink);background:var(--white)}
    .article-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:35px;padding-top:26px;border-top:1px solid var(--line)}
    .support-section{padding:0 0 88px}
    .support-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:35px;background:var(--purple);color:#fff;border-radius:20px;padding:38px 42px;align-items:center}
    .support-panel h2{font-size:30px;line-height:1.35;margin-bottom:12px}
    .support-panel p{color:#d8cdd6;margin-bottom:0}
    .support-links{display:flex;justify-content:flex-end;gap:12px;flex-wrap:wrap}
    .support-links .btn-primary{background:var(--accent);color:var(--ink)}
    .support-links .btn-secondary{border-color:#817481;color:#fff}
    .site-footer{background:#201d24;color:#d8cfd5;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:35px}
    .footer-brand p{color:#a99ea7;max-width:300px;margin:17px 0 0;font-size:13px}
    .footer-title{color:#fff;font-weight:750;margin-bottom:13px}
    .footer-links{display:grid;gap:8px;font-size:13px;color:#b9afb7}
    .footer-links a{transition:.2s}
    .footer-links a:hover{color:var(--accent)}
    .site-footer .logo{color:#fff}
    .site-footer .logo-mark{background:#fff;color:var(--ink)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #3a343b;margin-top:42px;padding-top:18px;color:#8f858e;font-size:12px}
    :focus-visible{outline:3px solid rgba(243,165,59,.65);outline-offset:3px}
    @media(max-width:1024px){
      .navbar{gap:18px}
      .nav-links a{padding:8px 9px}
      .article-layout{grid-template-columns:minmax(0,1fr) 260px;gap:32px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .navbar{height:70px}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:78px;background:var(--white);border:1px solid var(--line);border-radius:15px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{text-align:center;padding:13px}
      .nav-action{display:none}
      .menu-toggle{display:block;margin-left:auto}
      .article-hero{padding:56px 0 40px}
      h1{font-size:clamp(32px,9vw,46px)}
      .article-layout{display:block;padding-bottom:58px}
      .article-sidebar{position:static;margin-top:22px}
      .support-panel{grid-template-columns:1fr;padding:30px 25px}
      .support-links{justify-content:flex-start}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
      .copyright{display:grid;gap:6px}
    }
    @media(max-width:520px){
      .article-content{padding:24px 20px;border-radius:15px}
      .article-content h2{font-size:24px}
      .article-content table{font-size:13px;display:block;overflow-x:auto;white-space:nowrap}
      .support-links .btn{width:100%}
      .footer-grid{grid-template-columns:1fr}
      .footer-brand{grid-column:auto}
    }

/* roulang page: category1 */
:root{
      --ink:#201d24;
      --ink-soft:#514b55;
      --muted:#817982;
      --paper:#f7f5f1;
      --white:#fffdfa;
      --line:#e5dfd7;
      --accent:#f3a53b;
      --accent-deep:#c87916;
      --mint:#c6e3d4;
      --purple:#4b3b51;
      --shadow:0 18px 45px rgba(39,31,35,.09);
      --radius:18px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(243,165,59,.55);outline-offset:3px}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.25;letter-spacing:-.03em}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,241,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,223,215,.8)}
    .navbar{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;white-space:nowrap}
    .logo-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-size:17px;font-weight:900;position:relative}
    .logo-mark:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:var(--accent);right:-3px;top:-3px;border:2px solid var(--paper)}
    .logo span{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:7px;margin-left:auto}
    .nav-links a{padding:9px 14px;border-radius:9px;color:var(--ink-soft);transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:#ebe6df}
    .nav-links a.active{font-weight:700}
    .nav-action{background:var(--accent);padding:11px 18px;border-radius:10px;font-weight:750;transition:.2s ease}
    .nav-action:hover{background:#ffb957;transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
    .page-head{padding:76px 0 54px;background:var(--white);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:24px}
    .breadcrumb a:hover{color:var(--accent-deep)}
    .breadcrumb .current{color:var(--ink-soft)}
    .page-head-grid{display:grid;grid-template-columns:1fr 360px;gap:60px;align-items:end}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-deep);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:17px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    h1{font-size:clamp(35px,5vw,64px);margin-bottom:18px}
    .lead{font-size:17px;color:var(--ink-soft);max-width:700px;margin-bottom:0}
    .head-note{background:#f5efe6;border-left:4px solid var(--accent);padding:22px 24px;border-radius:0 14px 14px 0}
    .head-note strong{font-size:25px;display:block;line-height:1.2;margin:4px 0}
    .head-note span{color:var(--muted);font-size:13px}
    .section{padding:76px 0}
    .section-tight{padding:50px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    .section-head h2{font-size:clamp(27px,3.2vw,42px);margin-bottom:0}
    .section-head p{color:var(--muted);max-width:510px;margin-bottom:0}
    .filter-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--white);border:1px solid var(--line);padding:15px;border-radius:14px;margin-bottom:34px}
    .filter-label{font-size:13px;font-weight:800;color:var(--ink-soft);margin-right:3px}
    .filter-chip{border:1px solid var(--line);background:#faf8f4;color:var(--ink-soft);border-radius:8px;padding:9px 15px;transition:.2s}
    .filter-chip:hover,.filter-chip.active{background:var(--ink);border-color:var(--ink);color:#fff}
    .news-layout{display:grid;grid-template-columns:.86fr 1.14fr;gap:24px}
    .feature-news{background:var(--purple);color:#fff;border-radius:18px;padding:32px;min-height:330px;display:flex;flex-direction:column;justify-content:end;position:relative;overflow:hidden;box-shadow:var(--shadow)}
    .feature-news:before{content:"DF";position:absolute;right:25px;top:12px;font-size:120px;line-height:1;font-weight:900;color:rgba(255,255,255,.06)}
    .feature-news .tag{color:var(--accent)}
    .tag{display:inline-block;font-size:12px;font-weight:800;color:var(--accent-deep);letter-spacing:.04em}
    .feature-news h3{font-size:28px;margin:13px 0 10px;position:relative}
    .feature-news p{color:#d5cad3;font-size:14px;margin-bottom:22px;position:relative}
    .read-link{font-weight:750;color:var(--accent);display:inline-flex;gap:8px;align-items:center}
    .read-link:hover{color:#ffd18b}
    .news-list{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:7px 26px}
    .news-item{display:block;padding:19px 0;border-bottom:1px solid var(--line);transition:.2s}
    .news-item:last-child{border:0}
    .news-item:hover{padding-left:8px}
    .news-item time{font-size:12px;color:var(--muted)}
    .news-item h3{font-size:18px;margin:4px 0 4px}
    .news-item p{font-size:13px;color:var(--muted);margin-bottom:0}
    .empty-state{text-align:center;padding:60px 25px;color:var(--muted)}
    .empty-icon{width:52px;height:52px;border:1px solid var(--line);border-radius:15px;display:grid;place-items:center;margin:0 auto 15px;background:#faf8f4;color:var(--accent-deep);font-size:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:47px;padding:0 20px;border-radius:11px;font-weight:750;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#3b343e;transform:translateY(-2px);box-shadow:0 8px 20px rgba(32,29,36,.18)}
    .btn-secondary{border-color:#cfc7bd;background:transparent;color:var(--ink)}
    .btn-secondary:hover{border-color:var(--ink);background:var(--white)}
    .index-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .index-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:20px 22px;transition:.2s}
    .index-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d6c1a8}
    .index-card b{display:block;font-size:18px;margin:7px 0}
    .index-card p{font-size:13px;color:var(--muted);margin:0}
    .notice-panel{background:#eee7df;border-radius:18px;padding:28px 32px;display:grid;grid-template-columns:1fr 1fr;gap:28px}
    .notice-panel h2{font-size:27px;margin-bottom:10px}
    .notice-panel p{color:var(--ink-soft);margin:0}
    .notice-list{border-left:1px solid #d4c8bb;padding-left:25px}
    .notice-list li{margin:7px 0;color:var(--ink-soft)}
    .notice-list li::marker{color:var(--accent-deep)}
    .cta-band{background:var(--purple);color:#fff;border-radius:20px;padding:34px 38px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .cta-band h2{font-size:29px;margin-bottom:8px}
    .cta-band p{color:#d8ccd4;margin:0}
    .cta-band .btn{background:var(--accent);color:var(--ink)}
    .cta-band .btn:hover{background:#ffc36c;transform:translateY(-2px)}
    .site-footer{background:var(--ink);color:#fff;padding:57px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.55fr repeat(3,1fr);gap:35px;padding-bottom:43px}
    .footer-brand .logo{margin-bottom:16px}
    .footer-brand p{color:#bdb3ba;max-width:270px;font-size:13px}
    .footer-title{font-weight:800;margin-bottom:15px;color:#fff}
    .footer-links{display:grid;gap:8px}
    .footer-links a{color:#bdb3ba;font-size:13px;transition:.2s}
    .footer-links a:hover{color:var(--accent)}
    .copyright{border-top:1px solid #3b343e;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#948992;font-size:12px}
    @media(max-width:1024px){
      .navbar{gap:18px}.nav-links a{padding:8px 9px}.page-head-grid{gap:35px}
      .news-layout{grid-template-columns:1fr 1fr}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .navbar{height:70px}.nav-links{display:none;position:absolute;top:70px;left:0;right:0;background:var(--paper);padding:13px 16px 18px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{text-align:center;padding:12px}.nav-action{display:none}.menu-toggle{display:block;margin-left:auto}
      .page-head{padding:52px 0 40px}.page-head-grid,.news-layout,.notice-panel{grid-template-columns:1fr}
      .head-note{max-width:390px}.section{padding:55px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .index-strip{grid-template-columns:1fr}.feature-news{min-height:270px}.cta-band{display:block;padding:29px}
      .cta-band .btn{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-brand{grid-column:1/-1}
      .copyright{display:block}.copyright span{display:block;margin-top:5px}
    }
    @media(max-width:520px){
      h1{font-size:38px}.lead{font-size:15px}.filter-bar{align-items:stretch}.filter-label{width:100%}.filter-chip{flex:1;text-align:center}
      .news-list{padding:5px 18px}.feature-news{padding:25px}.feature-news h3{font-size:24px}
      .footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}
    }

/* roulang page: category2 */
:root{
      --ink:#201d24;
      --ink-soft:#514b55;
      --muted:#817982;
      --paper:#f7f5f1;
      --white:#fffdfa;
      --line:#e5dfd7;
      --accent:#f3a53b;
      --accent-deep:#c87916;
      --mint:#c6e3d4;
      --purple:#4b3b51;
      --shadow:0 18px 45px rgba(39,31,35,.09);
      --radius:18px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.25;letter-spacing:-.035em}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,241,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,223,215,.8)}
    .navbar{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;white-space:nowrap}
    .logo-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-size:17px;font-weight:900;position:relative}
    .logo-mark:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:var(--accent);right:-3px;top:-3px;border:2px solid var(--paper)}
    .logo span{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:7px;margin-left:auto}
    .nav-links a{padding:9px 14px;border-radius:9px;color:var(--ink-soft);transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:#ebe6df}
    .nav-links a.active{font-weight:700}
    .nav-action{background:var(--accent);padding:11px 18px;border-radius:10px;font-weight:750;transition:.2s ease}
    .nav-action:hover{background:#ffb957;transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
    .page-head{padding:74px 0 52px;border-bottom:1px solid var(--line)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-deep);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:18px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    .page-head h1{font-size:clamp(36px,5vw,64px);max-width:780px;margin-bottom:20px}
    .page-head p{color:var(--ink-soft);font-size:17px;max-width:720px;margin-bottom:24px}
    .crumbs{font-size:13px;color:var(--muted);display:flex;gap:9px;align-items:center}
    .crumbs a:hover{color:var(--accent-deep)}
    .section{padding:76px 0}
    .section-tight{padding:54px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section-head h2{font-size:clamp(27px,3.2vw,42px);margin-bottom:0}
    .section-head p{color:var(--muted);max-width:500px;margin-bottom:0}
    .download-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:stretch}
    .download-card{background:var(--purple);color:#fff;border-radius:22px;padding:38px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
    .download-card:after{content:"DF";position:absolute;right:-12px;bottom:-58px;font-size:190px;line-height:1;font-weight:900;color:rgba(255,255,255,.05)}
    .download-card h2{font-size:36px;position:relative;z-index:1}
    .download-card p{color:#d8cfd6;max-width:500px;position:relative;z-index:1}
    .download-meta{display:flex;gap:10px;flex-wrap:wrap;margin:25px 0;position:relative;z-index:1}
    .download-meta span,.badge{border:1px solid rgba(255,255,255,.22);padding:6px 11px;border-radius:7px;font-size:12px;color:#f1e9ed}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:11px;font-weight:750;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--accent);color:var(--ink)}
    .btn-primary:hover{background:#ffbc61;transform:translateY(-2px);box-shadow:0 8px 20px rgba(243,165,59,.24)}
    .btn-secondary{border-color:#cfc7bd;background:transparent;color:var(--ink)}
    .btn-secondary:hover{border-color:var(--ink);background:var(--white)}
    .device-panel{background:var(--white);border:1px solid var(--line);border-radius:22px;padding:32px;display:flex;align-items:center;gap:28px}
    .device{width:154px;height:270px;background:#29242d;border:7px solid #161319;border-radius:27px;padding:29px 12px 15px;position:relative;flex:none;box-shadow:0 14px 25px rgba(32,29,36,.2)}
    .device:before{content:"";position:absolute;top:10px;left:50%;transform:translateX(-50%);width:47px;height:5px;background:#514852;border-radius:5px}
    .screen-logo{height:88px;border-radius:15px;background:var(--accent);display:grid;place-items:center;color:var(--ink);font-size:24px;font-weight:900;margin-bottom:14px}
    .screen-line{height:8px;background:#5b5260;border-radius:8px;margin:9px 5px}
    .screen-line.short{width:58%}
    .device-copy h3{font-size:23px;margin-bottom:10px}
    .device-copy p{color:var(--muted);font-size:14px}
    .info-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:17px}
    .info-box{background:var(--white);border:1px solid var(--line);border-radius:13px;padding:17px 19px}
    .info-box small{color:var(--muted);display:block;font-size:12px}
    .info-box strong{display:block;font-size:18px;margin-top:3px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .step{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:25px;transition:.2s}
    .step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .step-num{color:var(--accent-deep);font-size:28px;font-weight:900;margin-bottom:22px}
    .step h3{font-size:19px;margin-bottom:8px}
    .step p{color:var(--muted);font-size:14px;margin-bottom:0}
    .timeline{border-left:2px solid var(--line);padding-left:28px;display:grid;gap:26px}
    .timeline-item{position:relative;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:21px 24px}
    .timeline-item:before{content:"";position:absolute;left:-37px;top:26px;width:14px;height:14px;background:var(--accent);border:4px solid var(--paper);border-radius:50%;box-shadow:0 0 0 1px var(--accent)}
    .timeline-item time{font-size:12px;color:var(--accent-deep);font-weight:800}
    .timeline-item h3{font-size:19px;margin:5px 0 6px}
    .timeline-item p{color:var(--muted);font-size:14px;margin-bottom:0}
    .notice{background:#fff4df;border:1px solid #f0d4a3;border-radius:16px;padding:23px 27px;display:flex;gap:17px;align-items:flex-start}
    .notice-mark{width:30px;height:30px;background:var(--accent);border-radius:9px;display:grid;place-items:center;font-weight:900;flex:none}
    .notice h3{font-size:18px;margin-bottom:5px}
    .notice p{margin:0;color:var(--ink-soft);font-size:14px}
    .faq-list{display:grid;gap:10px;max-width:850px}
    .faq-list details{background:var(--white);border:1px solid var(--line);border-radius:13px;padding:0 20px}
    .faq-list summary{cursor:pointer;list-style:none;padding:19px 0;font-weight:750}
    .faq-list summary::-webkit-details-marker{display:none}
    .faq-list summary:after{content:"+";float:right;color:var(--accent-deep);font-size:22px}
    .faq-list details[open] summary:after{content:"−"}
    .faq-list details p{border-top:1px solid var(--line);padding:15px 0 18px;color:var(--muted);font-size:14px;margin:0}
    .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .support-card{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:28px}
    .support-card h3{font-size:22px;margin-bottom:10px}
    .support-card p{color:var(--muted);font-size:14px}
    .cta-band{background:var(--ink);color:#fff;border-radius:20px;padding:35px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .cta-band h2{font-size:30px;margin-bottom:7px}
    .cta-band p{color:#cfc6cd;margin:0}
    .site-footer{background:var(--ink);color:#d8d0d6;padding:58px 0 24px;border-top:1px solid #403742}
    .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:35px;padding-bottom:45px}
    .footer-brand .logo{color:#fff;margin-bottom:17px}
    .footer-brand p{color:#aaa0a8;max-width:280px;font-size:14px}
    .footer-title{color:#fff;font-weight:750;margin-bottom:15px}
    .footer-links{display:grid;gap:9px}
    .footer-links a{color:#aaa0a8;font-size:14px;transition:.2s}
    .footer-links a:hover{color:var(--accent)}
    .copyright{border-top:1px solid #403742;padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#8f858e;font-size:12px}
    a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(243,165,59,.55);outline-offset:3px}
    @media(max-width:1024px){
      .navbar{gap:16px}.nav-links a{padding:8px 9px}
      .download-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1.5fr 1fr 1fr}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .navbar{height:68px}.nav-action{display:none}.menu-toggle{display:block;margin-left:auto}
      .nav-links{display:none;position:absolute;top:68px;left:16px;right:16px;background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;padding:10px;flex-direction:column;align-items:stretch}
      .nav-links.show{display:flex}.nav-links a{padding:13px 15px}
      .page-head{padding:56px 0 40px}.page-head h1{font-size:42px}
      .section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .device-panel{padding:24px;align-items:flex-start}.steps,.support-grid{grid-template-columns:1fr}
      .info-strip{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-brand{grid-column:1/-1}.copyright{display:block}.copyright span{display:block;margin-bottom:7px}
      .cta-band{display:block;padding:30px 25px}.cta-band .btn{margin-top:22px}
    }
    @media(max-width:520px){
      .logo span{font-size:14px}.page-head h1{font-size:35px}
      .download-card{padding:27px 23px}.download-card h2{font-size:29px}
      .device-panel{display:block}.device{margin:0 auto 24px}
      .timeline{padding-left:20px}.timeline-item:before{left:-29px}
      .footer-grid{grid-template-columns:1fr}
    }

/* roulang page: category3 */
:root{
      --ink:#201d24;
      --ink-soft:#514b55;
      --muted:#817982;
      --paper:#f7f5f1;
      --white:#fffdfa;
      --line:#e5dfd7;
      --accent:#f3a53b;
      --accent-deep:#c87916;
      --mint:#c6e3d4;
      --purple:#4b3b51;
      --shadow:0 18px 45px rgba(39,31,35,.09);
      --radius:18px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(243,165,59,.55);outline-offset:3px}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.25;letter-spacing:-.03em}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,241,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,223,215,.8)}
    .navbar{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;white-space:nowrap}
    .logo-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-size:17px;font-weight:900;position:relative}
    .logo-mark:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:var(--accent);right:-3px;top:-3px;border:2px solid var(--paper)}
    .logo span{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:7px;margin-left:auto}
    .nav-links a{padding:9px 14px;border-radius:9px;color:var(--ink-soft);transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:#ebe6df}
    .nav-links a.active{font-weight:700}
    .nav-action{background:var(--accent);padding:11px 18px;border-radius:10px;font-weight:750;transition:.2s ease}
    .nav-action:hover{background:#ffb957;transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
    .page-head{padding:72px 0 62px;border-bottom:1px solid var(--line)}
    .crumbs{font-size:13px;color:var(--muted);margin-bottom:26px}
    .crumbs a:hover{color:var(--accent-deep)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-deep);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:18px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    .page-head-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:70px;align-items:end}
    .page-head h1{font-size:clamp(35px,5vw,64px);max-width:700px;margin-bottom:20px}
    .lead{font-size:18px;color:var(--ink-soft);max-width:680px;margin-bottom:0}
    .head-note{background:var(--purple);color:#fff;border-radius:18px;padding:26px 28px;box-shadow:var(--shadow)}
    .head-note small{color:#d8cdd5;display:block;margin-bottom:8px}
    .head-note strong{font-size:22px;display:block;color:var(--accent);margin-bottom:8px}
    .head-note p{color:#e4dce1;font-size:14px;margin:0}
    .section{padding:82px 0}
    .section-tight{padding:58px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:32px}
    .section-head h2{font-size:clamp(28px,3.2vw,43px);margin:0}
    .section-head p{color:var(--muted);max-width:510px;margin:0}
    .guide-layout{display:grid;grid-template-columns:260px 1fr;gap:26px;align-items:start}
    .chapter-nav{position:sticky;top:105px;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:12px}
    .chapter-nav a{display:block;padding:13px 15px;border-radius:10px;color:var(--ink-soft);transition:.2s}
    .chapter-nav a:hover,.chapter-nav a.current{background:#fff1dc;color:var(--ink);font-weight:700}
    .guide-list{display:grid;gap:13px}
    .guide-row{display:grid;grid-template-columns:78px 1fr auto;gap:22px;align-items:center;background:var(--white);border:1px solid var(--line);border-radius:15px;padding:22px 24px;transition:.2s}
    .guide-row:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d8c5ae}
    .guide-no{font-size:29px;font-weight:900;color:var(--accent-deep)}
    .guide-row h3{font-size:19px;margin:0 0 5px}
    .guide-row p{color:var(--muted);font-size:14px;margin:0}
    .row-arrow{font-size:22px;color:var(--accent-deep)}
    .process{background:var(--purple);color:#fff;border-radius:22px;padding:38px}
    .process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
    .process-item{position:relative;padding:8px 28px 8px 0;border-right:1px solid #685d69;margin-right:25px}
    .process-item:last-child{border:0;margin:0}
    .process-item b{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent);color:var(--ink);margin-bottom:20px}
    .process-item h3{font-size:18px;margin-bottom:8px}
    .process-item p{color:#d8cfd6;font-size:14px;margin:0}
    .mobile-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:30px;align-items:stretch}
    .mobile-visual{background:#efe7dc;border-radius:20px;min-height:330px;padding:28px;position:relative;overflow:hidden}
    .mobile-visual:after{content:"DF";position:absolute;right:28px;bottom:-28px;color:rgba(75,59,81,.09);font-size:180px;font-weight:900;line-height:1}
    .mobile-card{position:relative;z-index:1;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:22px;max-width:280px;margin:20px auto 0;box-shadow:0 12px 28px rgba(39,31,35,.1)}
    .mobile-card .app-symbol{width:48px;height:48px;border-radius:14px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-weight:900;font-size:20px;margin-bottom:18px}
    .mobile-card strong{display:block;font-size:19px;margin-bottom:4px}
    .mobile-card span{font-size:13px;color:var(--muted)}
    .mobile-points{background:var(--white);border:1px solid var(--line);border-radius:20px;padding:30px}
    .point{display:flex;gap:15px;padding:17px 0;border-bottom:1px solid var(--line)}
    .point:last-child{border-bottom:0}
    .point i{font-style:normal;color:var(--accent-deep);font-weight:900}
    .point h3{font-size:17px;margin:0 0 4px}
    .point p{font-size:14px;color:var(--muted);margin:0}
    .support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .support-card{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:25px;min-height:170px}
    .support-card .tag{display:inline-block;color:var(--accent-deep);font-size:12px;font-weight:800;margin-bottom:14px}
    .support-card h3{font-size:20px;margin-bottom:8px}
    .support-card p{color:var(--muted);font-size:14px;margin:0}
    .notice-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .notice-box{border-radius:18px;padding:30px;background:var(--white);border:1px solid var(--line)}
    .notice-box.dark{background:var(--ink);color:#fff;border-color:var(--ink)}
    .notice-box h2{font-size:27px;margin-bottom:14px}
    .notice-box p{color:var(--muted);margin-bottom:20px}
    .notice-box.dark p{color:#d7ced5}
    .check-list{list-style:none;padding:0;margin:0}
    .check-list li{padding:11px 0;border-bottom:1px solid var(--line);color:var(--ink-soft)}
    .dark .check-list li{border-color:#4b424e;color:#e4dce1}
    .check-list li:before{content:"✓";color:var(--accent-deep);font-weight:900;margin-right:10px}
    .faq-list{display:grid;gap:10px;max-width:900px}
    details{background:var(--white);border:1px solid var(--line);border-radius:13px;padding:0 20px}
    summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:750}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";float:right;color:var(--accent-deep);font-size:22px}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;padding:0 26px 19px 0;margin:0}
    .cta{background:var(--accent);border-radius:20px;padding:42px 48px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta h2{font-size:32px;margin-bottom:8px}
    .cta p{margin:0;color:#60451f}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 21px;border-radius:11px;font-weight:750;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--ink);color:#fff}
    .btn-primary:hover{background:#3b343e;transform:translateY(-2px);box-shadow:0 8px 20px rgba(32,29,36,.18)}
    .btn-secondary{border-color:#cfc7bd;background:transparent;color:var(--ink)}
    .btn-secondary:hover{border-color:var(--ink);background:var(--white)}
    .site-footer{background:var(--ink);color:#fff;padding:58px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:38px;padding-bottom:43px}
    .footer-brand p{color:#cfc5cc;max-width:290px;font-size:14px;margin-top:18px}
    .footer-title{font-weight:800;margin-bottom:16px;color:var(--accent)}
    .footer-links{display:grid;gap:9px;color:#d7cfd4;font-size:14px}
    .footer-links a:hover{color:var(--accent)}
    .copyright{border-top:1px solid #453d48;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#a89da6;font-size:12px}
    @media(max-width:1024px){
      .navbar{gap:16px}.nav-links a{padding:8px 9px}
      .page-head-grid,.mobile-panel{gap:35px}
      .guide-layout{grid-template-columns:210px 1fr}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .navbar{height:70px}.menu-toggle{display:block;margin-left:auto}
      .nav-action{display:none}.nav-links{display:none;position:absolute;left:16px;right:16px;top:70px;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{padding:13px 15px}
      .page-head{padding:48px 0 45px}.page-head-grid,.guide-layout,.mobile-panel,.notice-grid{grid-template-columns:1fr}
      .head-note{max-width:520px}.chapter-nav{position:static;display:flex;overflow:auto;gap:5px}.chapter-nav a{white-space:nowrap}
      .process-grid{grid-template-columns:1fr 1fr;gap:22px}.process-item{border-right:0;margin:0;padding:0}
      .support-grid{grid-template-columns:1fr}.cta{align-items:flex-start;flex-direction:column;padding:32px 26px}
      .footer-grid{grid-template-columns:1fr 1fr}.copyright{flex-direction:column;gap:6px}
    }
    @media(max-width:520px){
      .page-head h1{font-size:37px}.section{padding:60px 0}
      .guide-row{grid-template-columns:45px 1fr;gap:13px;padding:18px}.row-arrow{display:none}
      .process{padding:26px 22px}.process-grid{grid-template-columns:1fr;gap:24px}
      .footer-grid{grid-template-columns:1fr}.copyright{font-size:11px}
    }

/* roulang page: category4 */
:root{
      --ink:#201d24;
      --ink-soft:#514b55;
      --muted:#817982;
      --paper:#f7f5f1;
      --white:#fffdfa;
      --line:#e5dfd7;
      --accent:#f3a53b;
      --accent-deep:#c87916;
      --mint:#c6e3d4;
      --purple:#4b3b51;
      --shadow:0 18px 45px rgba(39,31,35,.09);
      --radius:18px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:15px}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid rgba(243,165,59,.45);outline-offset:3px}
    img{display:block;max-width:100%}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.25;letter-spacing:-.035em}
    h1{font-size:clamp(38px,5vw,68px);margin-bottom:20px}
    h2{font-size:clamp(28px,3.2vw,43px);margin-bottom:12px}
    h3{font-size:19px;margin-bottom:8px}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,245,241,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,223,215,.8)}
    .navbar{height:78px;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:-.5px;white-space:nowrap}
    .logo-mark{width:38px;height:38px;border-radius:11px;background:var(--ink);color:var(--accent);display:grid;place-items:center;font-size:17px;font-weight:900;position:relative}
    .logo-mark:after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:var(--accent);right:-3px;top:-3px;border:2px solid var(--paper)}
    .logo span{font-size:16px}
    .nav-links{display:flex;align-items:center;gap:7px;margin-left:auto}
    .nav-links a{padding:9px 14px;border-radius:9px;color:var(--ink-soft);transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--ink);background:#ebe6df}
    .nav-links a.active{font-weight:700}
    .nav-action{background:var(--accent);padding:11px 18px;border-radius:10px;font-weight:750;transition:.2s ease}
    .nav-action:hover{background:#ffb957;transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;font-size:25px;color:var(--ink)}
    .page-head{padding:76px 0 58px;border-bottom:1px solid var(--line)}
    .head-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:end}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-deep);font-weight:800;font-size:13px;letter-spacing:.08em;margin-bottom:18px}
    .eyebrow:before{content:"";width:24px;height:2px;background:var(--accent)}
    .lead{color:var(--ink-soft);font-size:18px;max-width:680px;margin-bottom:0}
    .head-meta{background:var(--white);border:1px solid var(--line);border-radius:16px;padding:23px 25px;box-shadow:0 8px 25px rgba(39,31,35,.04)}
    .head-meta strong{display:block;font-size:28px;line-height:1.2;margin:5px 0}
    .head-meta span{font-size:13px;color:var(--muted)}
    .section{padding:80px 0}
    .section-tight{padding:58px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
    .section-head p{color:var(--muted);max-width:500px;margin:0}
    .notice-feature{display:grid;grid-template-columns:1fr 310px;gap:0;background:var(--purple);color:#fff;border-radius:20px;overflow:hidden;box-shadow:var(--shadow)}
    .feature-copy{padding:38px 42px}
    .feature-copy .tag{color:var(--accent)}
    .feature-copy h2{font-size:clamp(27px,3vw,39px);margin:13px 0}
    .feature-copy p{color:#d7cdd5;max-width:700px}
    .feature-side{background:#302933;padding:34px;display:flex;flex-direction:column;justify-content:space-between;border-left:1px solid rgba(255,255,255,.1)}
    .level{display:inline-flex;width:max-content;padding:6px 10px;border-radius:7px;background:var(--accent);color:var(--ink);font-size:12px;font-weight:800}
    .feature-side time{color:#d7cdd5;font-size:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;min-height:47px;padding:0 20px;border-radius:11px;font-weight:750;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--accent);color:var(--ink)}
    .btn-primary:hover{background:#ffbc61;transform:translateY(-2px)}
    .btn-secondary{border-color:#cfc7bd;background:transparent;color:var(--ink)}
    .btn-secondary:hover{border-color:var(--ink);background:var(--white)}
    .feature-side .btn{margin-top:25px}
    .filter-bar{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin-bottom:21px}
    .filter-label{font-weight:800;margin-right:5px}
    .filter-chip{border:1px solid var(--line);color:var(--ink-soft);background:var(--paper);border-radius:8px;padding:7px 13px;font-size:13px}
    .filter-chip.current{background:var(--ink);border-color:var(--ink);color:#fff}
    .notice-list{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:7px 28px}
    .notice-row{display:grid;grid-template-columns:110px 1fr 88px;gap:22px;align-items:center;padding:23px 0;border-bottom:1px solid var(--line);transition:.2s ease}
    .notice-row:last-child{border-bottom:0}
    .notice-row:hover{padding-left:8px;background:linear-gradient(90deg,transparent,#fff8ed)}
    .notice-date{font-size:13px;color:var(--muted)}
    .notice-date b{display:block;font-size:25px;line-height:1.1;color:var(--ink)}
    .tag{display:inline-block;font-size:12px;font-weight:800;color:var(--accent-deep);letter-spacing:.04em}
    .notice-row p{font-size:14px;color:var(--muted);margin:0}
    .read-link{font-size:13px;font-weight:800;color:var(--accent-deep);text-align:right}
    .read-link:hover{color:var(--ink)}
    .more-row{text-align:center;padding:25px 0 7px}
    .status-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}
    .status-panel,.info-panel{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:30px}
    .status-panel{background:#eee9e2}
    .status-line{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--line)}
    .status-line:last-child{border:0}
    .state{color:#4f7e68;font-weight:800}
    .state:before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:#68a982;margin-right:8px}
    .info-panel p{color:var(--muted);margin-bottom:0}
    .info-panel .icon-box{width:44px;height:44px;border-radius:12px;background:var(--mint);display:grid;place-items:center;font-weight:900;margin-bottom:20px}
    .faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:55px}
    .faq-intro p{color:var(--muted)}
    .faq-list{display:grid;gap:10px}
    details{background:var(--white);border:1px solid var(--line);border-radius:13px;padding:18px 21px}
    summary{cursor:pointer;font-weight:750;list-style:none;position:relative;padding-right:25px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";position:absolute;right:0;color:var(--accent-deep);font-size:22px;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:14px;margin:14px 22px 0 0}
    .support-band{background:var(--ink);color:#fff;border-radius:20px;padding:38px 42px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .support-band p{color:#cfc4ca;margin:8px 0 0}
    .site-footer{background:var(--ink);color:#d8cfd4;padding:64px 0 24px;margin-top:30px}
    .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:35px}
    .footer-brand .logo{color:#fff;margin-bottom:17px}
    .footer-brand p{font-size:14px;color:#afa4ac;max-width:290px}
    .footer-title{color:#fff;font-weight:800;margin-bottom:15px}
    .footer-links{display:grid;gap:9px;font-size:14px;color:#afa4ac}
    .footer-links a{transition:.2s}
    .footer-links a:hover{color:var(--accent)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #423945;margin-top:43px;padding-top:20px;color:#897e87;font-size:12px}
    @media(max-width:1024px){
      .navbar{gap:16px}.nav-links a{padding:8px 9px}
      .head-grid,.status-grid{gap:35px}
      .notice-feature{grid-template-columns:1fr 250px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .navbar{height:70px}.nav-links{display:none;position:absolute;top:70px;left:16px;right:16px;background:var(--white);border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{text-align:center;padding:12px}
      .nav-action{display:none}.menu-toggle{display:block;margin-left:auto}
      .page-head{padding:54px 0 42px}.head-grid,.notice-feature,.status-grid,.faq-grid{grid-template-columns:1fr}
      .head-meta{max-width:390px}.section{padding:60px 0}
      .feature-side{border-left:0;border-top:1px solid rgba(255,255,255,.1);gap:15px}
      .feature-copy{padding:30px}
      .notice-row{grid-template-columns:82px 1fr;gap:14px}
      .read-link{grid-column:2;text-align:left}
      .footer-grid{grid-template-columns:1fr 1fr}.support-band{display:block;padding:30px}
      .support-band .btn{margin-top:20px}
      .copyright{display:block}.copyright span{display:block;margin-bottom:7px}
    }
    @media(max-width:520px){
      h1{font-size:39px}.section-head{display:block}.section-head p{margin-top:12px}
      .filter-bar{align-items:flex-start}.filter-label{width:100%}
      .notice-list{padding:5px 18px}.notice-row{padding:19px 0}
      .status-panel,.info-panel{padding:23px}.footer-grid{grid-template-columns:1fr}
      .logo span{font-size:14px}
    }