/* roulang page: index */
:root{
  --pine:#183d36;
  --pine-deep:#102f2a;
  --orange:#f47b38;
  --orange-dark:#d96225;
  --sage:#ddebe4;
  --cream:#f7f5f0;
  --paper:#fffdfa;
  --ink:#222a27;
  --muted:#69736e;
  --line:#d6e2dc;
  --radius:18px;
  --shadow:0 14px 35px rgba(24,61,54,.08);
  --shadow-hover:0 18px 42px rgba(24,61,54,.14);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--cream);color:var(--ink);font-size:16px;line-height:1.7}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit}
button{cursor:pointer;border:0}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 48px));margin:auto}
.site-header{height:78px;background:rgba(255,253,250,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px);transition:.2s}
.header-inner{height:100%;display:flex;align-items:center;gap:34px}
.logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-weight:750;font-size:18px;white-space:nowrap}
.logo-mark{width:34px;height:34px;border-radius:11px;background:var(--pine);display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:-1px;box-shadow:inset -5px -5px 0 rgba(244,123,56,.85)}
.main-nav{display:flex;align-items:center;gap:7px;flex:1}
.main-nav a{padding:9px 13px;border-radius:10px;color:#53615b;font-size:14px;transition:.18s}
.main-nav a:hover,.main-nav a.active{background:var(--sage);color:var(--pine);font-weight:650}
.header-actions{display:flex;align-items:center;gap:15px}
.support-link{font-size:14px;color:var(--muted)}
.btn{min-height:46px;padding:0 20px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:650;transition:.2s;border:1px solid transparent}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
.btn-dark{background:var(--pine);color:#fff}
.btn-dark:hover{background:var(--pine-deep);transform:translateY(-2px)}
.btn-outline{border-color:var(--pine);color:var(--pine);background:transparent}
.btn-outline:hover{background:var(--sage);transform:translateY(-2px)}
.btn:focus,a:focus,input:focus,textarea:focus{outline:3px solid rgba(244,123,56,.3);outline-offset:3px}
.menu-toggle{display:none;background:none;color:var(--pine);font-size:25px}
.hero{padding:88px 0 92px;position:relative;overflow:hidden;background:var(--paper)}
.hero:after{content:"";position:absolute;width:680px;height:430px;border-radius:50%;background:var(--sage);right:-190px;top:-135px;opacity:.8}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;align-items:center;gap:70px;position:relative;z-index:1}
.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--orange-dark);font-size:13px;font-weight:750;letter-spacing:.05em}
.eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:var(--orange)}
.hero h1{font-size:clamp(36px,4.5vw,58px);line-height:1.2;letter-spacing:-.05em;color:var(--pine);margin:18px 0 20px}
.hero-copy{font-size:17px;color:var(--muted);max-width:570px}
.hero-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero-note{display:flex;gap:20px;margin-top:26px;color:var(--muted);font-size:13px}
.hero-note strong{display:block;color:var(--pine);font-size:18px}
.portal-art{min-height:390px;position:relative;display:flex;align-items:center;justify-content:center}
.portal-board{width:350px;border:10px solid var(--pine);border-radius:30px;background:#fff;box-shadow:var(--shadow-hover);padding:23px;transform:rotate(3deg);position:relative;z-index:2}
.portal-top{display:flex;justify-content:space-between;align-items:center;color:var(--pine);font-weight:750;margin-bottom:22px}
.portal-dot{width:10px;height:10px;background:var(--orange);border-radius:50%;display:inline-block;margin-right:6px}
.portal-card{padding:17px;border-radius:14px;background:var(--sage);margin-bottom:12px}
.portal-card small{color:var(--muted);font-size:12px}
.portal-card strong{display:block;color:var(--pine);font-size:18px;margin-top:4px}
.portal-lines{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin-top:15px}
.portal-lines span{height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:12px}
.float-label{position:absolute;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:13px;padding:12px 15px;color:var(--pine);font-weight:700;font-size:13px}
.label-one{left:5%;top:15%}.label-two{right:2%;bottom:17%}
.section{padding:88px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:32px}
.section h2{font-size:32px;line-height:1.25;letter-spacing:-.035em;color:var(--pine);margin-top:10px}
.section-intro{color:var(--muted);max-width:520px;font-size:15px}
.anchor-strip{padding:24px 0;background:var(--sage);border-bottom:1px solid var(--line)}
.anchor-list{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none}
.anchor-list::-webkit-scrollbar{display:none}
.anchor-item{flex:0 0 auto;background:#fff;border:1px solid transparent;border-radius:13px;padding:13px 17px;display:flex;align-items:center;gap:9px;color:var(--pine);font-weight:650;font-size:14px;transition:.2s}
.anchor-item:hover{border-color:var(--orange);transform:translateY(-2px);box-shadow:var(--shadow)}
.anchor-icon{width:25px;height:25px;border-radius:8px;background:#fce7d8;color:var(--orange-dark);display:grid;place-items:center;font-size:12px}
.overview{background:var(--paper)}
.overview-grid{display:grid;grid-template-columns:1.4fr .8fr;gap:22px}
.notice-panel{background:var(--pine);border-radius:var(--radius);padding:30px;color:#fff;min-height:210px}
.notice-panel .section-kicker{color:#f8c5a4}.notice-panel h3{font-size:24px;margin:18px 0 10px}.notice-panel p{color:#c7d8d0;max-width:600px}
.notice-meta{display:flex;gap:16px;color:#f5b28d;font-size:13px}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:13px}
.metric{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px 16px;display:flex;flex-direction:column;justify-content:center}
.metric b{font-size:27px;color:var(--pine)}.metric span{font-size:13px;color:var(--muted)}
.content-grid{display:grid;grid-template-columns:1fr .86fr;gap:22px}
.feature-card,.news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.feature-card{overflow:hidden}
.feature-cover{height:175px;background:linear-gradient(135deg,var(--pine),#397263);position:relative;padding:24px;color:#fff}
.feature-cover:after{content:"NG28";position:absolute;right:25px;bottom:5px;font-size:66px;font-weight:800;opacity:.12}
.feature-body{padding:25px}.badge{display:inline-flex;padding:4px 10px;background:#fce7d8;color:var(--orange-dark);border-radius:20px;font-size:12px;font-weight:700}
.feature-body h3{font-size:23px;color:var(--pine);line-height:1.4;margin:12px 0 8px}
.card-summary{color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-meta{display:flex;justify-content:space-between;gap:12px;color:#84918b;font-size:12px;margin-top:17px}
.read-link{color:var(--pine);font-weight:700;font-size:13px;white-space:nowrap}
.news-list{padding:10px 23px}
.news-row{display:block;padding:18px 0;border-bottom:1px solid var(--line);transition:.2s}
.news-row:last-child{border-bottom:0}.news-row:hover{padding-left:5px}
.news-row h3{font-size:16px;color:var(--pine);margin:5px 0;line-height:1.45}.news-row p{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-row .card-meta{margin-top:5px}
.guide-section{background:var(--sage)}
.number-list{border-top:1px solid rgba(24,61,54,.18)}
.number-item{display:grid;grid-template-columns:65px 1fr 20px;align-items:center;gap:18px;padding:22px 5px;border-bottom:1px solid rgba(24,61,54,.18);transition:.2s}
.number-item:hover{padding-left:12px;background:rgba(255,255,255,.34)}
.number{font-size:20px;font-weight:800;color:var(--orange)}
.number-item h3{font-size:18px;color:var(--pine)}.number-item p{color:var(--muted);font-size:14px}
.arrow{color:var(--orange);font-size:22px}
.download-section{background:var(--paper)}
.download-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:75px;align-items:center}
.device{width:220px;height:405px;border:9px solid var(--pine);border-radius:31px;background:#fff;margin:auto;box-shadow:var(--shadow-hover);padding:27px 15px 15px;position:relative}
.device:before{content:"";position:absolute;top:10px;left:50%;width:65px;height:6px;transform:translateX(-50%);border-radius:9px;background:var(--pine)}
.device-screen{background:var(--sage);height:100%;border-radius:17px;padding:17px 12px}
.device-screen strong{font-size:17px;color:var(--pine)}.screen-bar{height:9px;border-radius:8px;background:#fff;margin:14px 0}.screen-box{height:76px;background:#fff;border-radius:12px;margin:10px 0;padding:12px;color:var(--pine);font-size:12px}.screen-box b{display:block;font-size:17px;margin-top:8px}
.download-copy h2{margin-bottom:14px}.download-copy>p{color:var(--muted);max-width:580px}.download-buttons{display:flex;gap:12px;margin:24px 0;flex-wrap:wrap}.download-info{display:flex;gap:25px;color:var(--muted);font-size:13px}.download-info strong{display:block;color:var(--pine);font-size:14px}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:35px}
.step{position:relative;padding:0 20px 0 0}.step:not(:last-child):after{content:"";position:absolute;top:17px;left:39px;width:calc(100% - 25px);height:1px;background:var(--pine)}
.step-dot{width:35px;height:35px;border-radius:50%;background:var(--orange);color:#fff;display:grid;place-items:center;font-weight:750;position:relative;z-index:1;margin-bottom:18px}.step h3{color:var(--pine);font-size:17px}.step p{color:var(--muted);font-size:13px;margin-top:5px}
.dynamic-cards{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:16px}
.dynamic-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:190px;transition:.2s}
.dynamic-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#b6d2c5}.dynamic-card:first-child{background:var(--pine);color:#fff}.dynamic-card:first-child h3{color:#fff}.dynamic-card h3{font-size:19px;color:var(--pine);margin:14px 0 8px}.dynamic-card p{font-size:14px;color:var(--muted)}.dynamic-card:first-child p{color:#c8d9d1}
.security{background:var(--pine);color:#fff}.security-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:70px;align-items:center}.security h2{color:#fff}.security-intro{color:#c7d8d0;margin-top:14px}.shield{width:130px;height:150px;border:2px solid #8bb5a4;border-radius:55% 55% 48% 48%;display:grid;place-items:center;margin:auto;color:#f6ad83;font-size:46px;position:relative}.shield:after{content:"";position:absolute;inset:13px;border:1px solid rgba(255,255,255,.2);border-radius:50%}
.security-list{border-top:1px solid rgba(255,255,255,.2)}.security-item{padding:17px 0;border-bottom:1px solid rgba(255,255,255,.2);display:flex;justify-content:space-between;gap:20px}.security-item strong{font-size:16px}.security-item span{color:#c7d8d0;font-size:14px;text-align:right}
.announcement{background:var(--paper)}.announcement-list{max-width:790px;border-left:2px solid var(--sage);margin:35px auto 0;padding-left:30px}.announcement-item{position:relative;padding:0 0 27px}.announcement-item:before{content:"";position:absolute;left:-39px;top:7px;width:14px;height:14px;border-radius:50%;background:var(--sage);border:3px solid var(--paper)}.announcement-item.latest:before{background:var(--orange)}.announcement-item time{font-size:13px;color:var(--muted)}.announcement-item h3{font-size:18px;color:var(--pine);margin:5px 0}.announcement-item p{color:var(--muted);font-size:14px}
.beginner-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:55px;align-items:center}.beginner-steps{margin-top:25px}.beginner-step{display:flex;gap:16px;padding:13px 0}.beginner-step b{width:28px;height:28px;border-radius:9px;background:var(--sage);color:var(--pine);display:grid;place-items:center;flex:0 0 auto}.beginner-step h3{font-size:16px;color:var(--pine)}.beginner-step p{font-size:13px;color:var(--muted)}
.map-card{background:var(--sage);border-radius:var(--radius);padding:33px}.map-card h3{color:var(--pine);font-size:21px;margin-bottom:22px}.map-path{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.map-path span{padding:12px 15px;background:#fff;border-radius:11px;color:var(--pine);font-size:14px;font-weight:650}.map-path i{color:var(--orange);font-style:normal}
.faq{background:var(--paper)}.faq-list{max-width:850px;margin:32px auto 0}.faq-item{border-bottom:1px solid var(--line)}.faq-question{width:100%;background:none;text-align:left;padding:19px 4px;color:var(--pine);font-size:16px;font-weight:700;display:flex;justify-content:space-between}.faq-question span{color:var(--orange);font-size:22px}.faq-answer{display:none;padding:0 35px 19px 4px;color:var(--muted);font-size:14px}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span{transform:rotate(45deg)}
.cta{padding:35px 40px;background:#fff;border:2px solid var(--pine);border-radius:24px;display:flex;justify-content:space-between;align-items:center;gap:25px}.cta h2{font-size:26px;color:var(--pine);margin-bottom:7px}.cta p{color:var(--muted);font-size:14px}.cta-actions{display:flex;gap:10px;flex-wrap:wrap}
.site-footer{background:var(--pine);color:#d9e7e0;padding:60px 0 25px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:35px;padding-bottom:45px}.footer-brand .logo{color:#fff;margin-bottom:16px}.footer-brand p{color:#aac3b8;font-size:14px;max-width:270px}.footer-col h3{color:#fff;font-size:15px;margin-bottom:16px}.footer-col a{display:block;color:#aac3b8;font-size:13px;margin:9px 0;transition:.2s}.footer-col a:hover{color:#f5a678}.footer-bottom{border-top:1px solid rgba(255,255,255,.16);padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#94afa4;font-size:12px}
@media(max-width:1020px){.main-nav{gap:0}.main-nav a{padding:8px 8px;font-size:13px}.header-inner{gap:18px}.hero-grid{gap:35px}.footer-grid{grid-template-columns:1.3fr repeat(3,1fr);gap:20px}}
@media(max-width:768px){.container{width:min(100% - 32px,600px)}.site-header{height:68px}.main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;padding:14px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.show{display:flex}.main-nav a{padding:12px 14px}.support-link{display:none}.menu-toggle{display:block}.header-actions{margin-left:auto}.header-actions .btn{min-height:40px;padding:0 13px;font-size:13px}.hero{padding:58px 0 65px}.hero-grid,.download-grid,.security-grid,.beginner-grid,.overview-grid,.content-grid{grid-template-columns:1fr}.hero h1{font-size:39px}.portal-art{min-height:350px}.section{padding:64px 0}.section-head{display:block}.section-intro{margin-top:12px}.metrics{grid-template-columns:repeat(3,1fr)}.dynamic-cards{grid-template-columns:1fr 1fr}.dynamic-card:first-child{grid-column:span 2}.timeline{grid-template-columns:1fr 1fr;gap:28px}.step:not(:last-child):after{display:none}.download-grid{gap:40px}.security-grid{gap:35px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:span 2}.cta{display:block;padding:28px}.cta-actions{margin-top:20px}}
@media(max-width:520px){body{font-size:15px}.hero h1{font-size:34px}.hero-note{gap:12px}.portal-board{width:285px}.float-label{font-size:11px;padding:9px}.label-one{left:0}.label-two{right:0}.section h2{font-size:27px}.metrics{gap:8px}.metric{padding:15px 9px}.metric b{font-size:21px}.metric span{font-size:11px}.dynamic-cards{grid-template-columns:1fr}.dynamic-card:first-child{grid-column:auto}.timeline{grid-template-columns:1fr}.download-info{display:block}.download-info div{margin-top:10px}.number-item{grid-template-columns:42px 1fr 16px;gap:10px}.number-item h3{font-size:16px}.announcement-list{padding-left:23px}.announcement-item:before{left:-32px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:span 2}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}}

/* roulang page: article */
:root{
      --pine:#183d36;
      --pine-deep:#102f2a;
      --orange:#f47b38;
      --orange-dark:#d96225;
      --sage:#ddebe4;
      --cream:#f7f5f0;
      --paper:#fffdfa;
      --ink:#222a27;
      --muted:#69736e;
      --line:#d6e2dc;
      --radius:18px;
      --shadow:0 14px 35px rgba(24,61,54,.08);
      --shadow-hover:0 18px 42px rgba(24,61,54,.14);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(1180px,calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,250,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px)}
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-size:18px;font-weight:750;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--pine);display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:-1px;box-shadow:inset -5px -5px 0 rgba(244,123,56,.85)}
    .main-nav{display:flex;align-items:center;gap:7px;flex:1}
    .main-nav a{padding:9px 13px;border-radius:10px;color:#53615b;font-size:14px;transition:.2s}
    .main-nav a:hover,.main-nav a.active{background:var(--sage);color:var(--pine);font-weight:650}
    .header-actions{display:flex;align-items:center;gap:15px}
    .btn{min-height:46px;padding:0 20px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:650;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
    .btn-dark{background:var(--pine);color:#fff}
    .btn-dark:hover{background:var(--pine-deep);transform:translateY(-2px)}
    .btn-outline{border-color:var(--pine);color:var(--pine);background:transparent}
    .btn-outline:hover{background:var(--sage);transform:translateY(-2px)}
    .btn:focus,a:focus,input:focus,textarea:focus{outline:3px solid rgba(244,123,56,.3);outline-offset:3px}
    .menu-toggle{display:none;background:none;color:var(--pine);font-size:25px}
    .article-hero{padding:72px 0 62px;background:var(--paper);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:28px}
    .breadcrumb a:hover{color:var(--orange-dark)}
    .breadcrumb span{color:#a2ada7}
    .article-layout{display:grid;grid-template-columns:minmax(0,820px) 250px;gap:64px;align-items:start}
    .article-label{display:inline-flex;align-items:center;gap:8px;color:var(--orange-dark);font-size:13px;font-weight:750;letter-spacing:.04em}
    .article-label:before{content:"";width:24px;height:2px;background:var(--orange)}
    .article-title{font-size:clamp(34px,4.5vw,52px);line-height:1.25;letter-spacing:-.045em;color:var(--pine);margin:18px 0 20px;font-weight:750}
    .article-lead{font-size:18px;color:var(--muted);max-width:760px;margin:0}
    .article-meta{display:flex;flex-wrap:wrap;gap:18px;margin-top:25px;color:#7d8983;font-size:13px}
    .meta-item{display:inline-flex;align-items:center;gap:6px}
    .meta-dot{width:5px;height:5px;background:var(--orange);border-radius:50%}
    .reading-card{background:var(--sage);border-radius:16px;padding:22px;position:sticky;top:105px}
    .reading-card strong{display:block;color:var(--pine);font-size:17px;margin-bottom:12px}
    .reading-card p{color:var(--muted);font-size:13px;margin:0 0 17px}
    .reading-line{height:5px;background:rgba(24,61,54,.12);border-radius:10px;overflow:hidden}
    .reading-line i{display:block;width:62%;height:100%;background:var(--orange);border-radius:10px}
    .article-section{padding:72px 0}
    .article-content-wrap{display:grid;grid-template-columns:minmax(0,820px) 250px;gap:64px;align-items:start}
    .article-summary{background:var(--sage);border-left:4px solid var(--orange);border-radius:0 15px 15px 0;padding:22px 25px;margin-bottom:42px;color:var(--pine)}
    .article-summary strong{display:block;font-size:17px;margin-bottom:5px}
    .article-summary p{margin:0;color:#4e625a;font-size:15px}
    .article-body{max-width:800px;font-size:17px;line-height:1.95}
    .article-body h2{font-size:30px;line-height:1.35;color:var(--pine);margin:46px 0 17px;letter-spacing:-.03em}
    .article-body h3{font-size:21px;color:var(--pine);margin:32px 0 12px}
    .article-body p{margin:0 0 22px}
    .article-body ul,.article-body ol{padding-left:25px;margin:0 0 24px}
    .article-body li{padding:4px 0}
    .article-body blockquote{border-left:4px solid var(--orange);background:#fff;padding:18px 22px;margin:28px 0;border-radius:0 12px 12px 0;color:#52635c}
    .article-body img{border-radius:15px;margin:28px auto}
    .article-body table{width:100%;border-collapse:collapse;margin:28px 0;background:#fff;font-size:15px}
    .article-body th,.article-body td{padding:12px 15px;border:1px solid var(--line);text-align:left}
    .article-body th{background:var(--sage);color:var(--pine)}
    .article-body a{color:var(--orange-dark);text-decoration:underline;text-underline-offset:3px}
    .notice-card{display:flex;align-items:center;gap:18px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:19px 21px;margin:42px 0;box-shadow:var(--shadow)}
    .notice-icon{width:40px;height:40px;border-radius:12px;background:#fce7d8;color:var(--orange-dark);display:grid;place-items:center;font-size:20px;flex:0 0 auto}
    .notice-card strong{display:block;color:var(--pine);font-size:16px}
    .notice-card p{margin:2px 0 0;color:var(--muted);font-size:13px}
    .notice-card .btn{margin-left:auto;min-height:40px;padding:0 15px;font-size:13px}
    .related-section{padding:0 0 80px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:25px}
    .section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--orange-dark);font-size:13px;font-weight:750}
    .section-kicker:before{content:"";width:24px;height:2px;background:var(--orange)}
    .section-head h2{font-size:30px;line-height:1.3;color:var(--pine);margin:9px 0 0}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .related-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:21px;transition:.2s}
    .related-card:hover{transform:translateY(-4px);border-color:#efb08c;box-shadow:var(--shadow-hover)}
    .related-card .badge{display:inline-flex;padding:4px 10px;background:#fce7d8;color:var(--orange-dark);border-radius:20px;font-size:12px;font-weight:700}
    .related-card h3{font-size:18px;line-height:1.45;color:var(--pine);margin:13px 0 8px}
    .related-card p{font-size:13px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .related-card time{display:block;margin-top:16px;color:#89958f;font-size:12px}
    .article-bottom{padding:32px 0 82px;border-top:1px solid var(--line)}
    .bottom-actions{display:flex;justify-content:space-between;align-items:center;gap:20px}
    .feedback{color:var(--muted);font-size:14px}
    .feedback strong{display:block;color:var(--pine);font-size:17px;margin-bottom:4px}
    .action-group{display:flex;gap:10px;flex-wrap:wrap}
    .site-footer{background:var(--pine);color:#e9f1ed;padding:58px 0 23px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px;padding-bottom:45px}
    .footer-brand p{color:#b8ccc2;max-width:280px;font-size:14px;margin-top:18px}
    .footer-brand .logo{color:#fff}
    .footer-col h3{font-size:15px;color:#fff;margin:4px 0 15px}
    .footer-col a{display:block;color:#b8ccc2;font-size:14px;margin:9px 0;transition:.2s}
    .footer-col a:hover{color:#f8b58d;transform:translateX(3px)}
    .footer-bottom{border-top:1px solid rgba(221,235,228,.18);padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#a9c0b5;font-size:12px}
    @media (max-width:992px){
      .header-inner{gap:18px}
      .main-nav a{padding:8px 8px;font-size:13px}
      .article-layout,.article-content-wrap{grid-template-columns:minmax(0,1fr);gap:28px}
      .reading-card{position:static;max-width:420px}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
      .footer-col:last-child{grid-column:2}
    }
    @media (max-width:768px){
      .container{width:min(100% - 32px,620px)}
      .site-header{height:68px}
      .header-inner{justify-content:space-between}
      .main-nav{display:none;position:absolute;left:16px;right:16px;top:76px;background:var(--paper);border:1px solid var(--line);border-radius:15px;padding:12px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 14px}
      .header-actions .btn{min-height:40px;padding:0 12px;font-size:13px}
      .menu-toggle{display:block}
      .article-hero{padding:48px 0 42px}
      .article-section{padding:48px 0}
      .article-title{font-size:36px}
      .article-lead{font-size:16px}
      .article-body{font-size:16px}
      .article-body h2{font-size:26px}
      .related-grid{grid-template-columns:1fr}
      .notice-card{align-items:flex-start;flex-wrap:wrap}
      .notice-card .btn{margin-left:58px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:27px}
      .footer-brand{grid-column:1/-1}
      .footer-col:last-child{grid-column:auto}
      .footer-bottom{flex-direction:column;gap:6px}
    }
    @media (max-width:520px){
      .logo{font-size:15px}
      .logo-mark{width:30px;height:30px}
      .header-actions{gap:7px}
      .header-actions .btn-outline{display:none}
      .article-title{font-size:31px}
      .article-meta{gap:10px;flex-direction:column}
      .article-summary{padding:18px 19px}
      .bottom-actions{align-items:flex-start;flex-direction:column}
      .action-group{width:100%}
      .action-group .btn{flex:1}
      .footer-grid{grid-template-columns:1fr}
      .footer-col:last-child{grid-column:auto}
    }

/* roulang page: category1 */
:root{--pine:#183d36;--pine-deep:#102f2a;--orange:#f47b38;--orange-dark:#d96225;--sage:#ddebe4;--cream:#f7f5f0;--paper:#fffdfa;--ink:#222a27;--muted:#69736e;--line:#d6e2dc;--radius:18px;--shadow:0 14px 35px rgba(24,61,54,.08);--shadow-hover:0 18px 42px rgba(24,61,54,.14)}
    *{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}a{color:inherit;text-decoration:none}a:focus,button:focus{outline:3px solid rgba(244,123,56,.3);outline-offset:3px}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,250,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.header-inner{height:100%;display:flex;align-items:center;gap:34px}.logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-weight:750;font-size:18px;white-space:nowrap}.logo-mark{width:34px;height:34px;border-radius:11px;background:var(--pine);display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:-1px;box-shadow:inset -5px -5px 0 rgba(244,123,56,.85)}.main-nav{display:flex;align-items:center;gap:7px;flex:1}.main-nav a{padding:9px 13px;border-radius:10px;color:#53615b;font-size:14px;transition:.2s}.main-nav a:hover,.main-nav a.active{background:var(--sage);color:var(--pine);font-weight:650}.header-actions{display:flex;align-items:center;gap:15px}.btn{min-height:46px;padding:0 20px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:650;transition:.2s;border:1px solid transparent}.btn-primary{background:var(--orange);color:#fff}.btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}.btn-dark{background:var(--pine);color:#fff}.btn-dark:hover{background:var(--pine-deep);transform:translateY(-2px)}.btn-outline{border-color:var(--pine);color:var(--pine);background:transparent}.btn-outline:hover{background:var(--sage);transform:translateY(-2px)}.menu-toggle{display:none;background:none;color:var(--pine);font-size:25px}
    .page-head{padding:72px 0 64px;background:var(--paper);border-bottom:1px solid var(--line)}.crumbs{font-size:13px;color:var(--muted);margin-bottom:24px}.crumbs a:hover{color:var(--orange-dark)}.crumbs span{margin:0 9px;color:#9aa8a1}.head-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:end}.eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--orange-dark);font-size:13px;font-weight:750;letter-spacing:.05em}.eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:var(--orange)}h1{font-size:clamp(34px,5vw,54px);line-height:1.2;letter-spacing:-.05em;color:var(--pine);margin:17px 0 18px}h2{font-size:32px;line-height:1.3;color:var(--pine);letter-spacing:-.035em;margin:10px 0}.lead{font-size:17px;color:var(--muted);max-width:680px}.head-meta{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}.pill,.badge{display:inline-flex;padding:7px 13px;border-radius:30px;background:var(--sage);color:var(--pine);font-size:13px;font-weight:650}.badge{padding:4px 10px;background:#fce7d8;color:var(--orange-dark);font-size:12px}
    .section{padding:78px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:30px}.section-intro{max-width:580px;color:var(--muted);font-size:15px}.focus-card{display:grid;grid-template-columns:1.3fr .7fr;gap:28px;background:var(--pine);color:#fff;border-radius:var(--radius);padding:34px 38px;box-shadow:var(--shadow)}.focus-card h2{color:#fff;margin:14px 0 10px;font-size:27px}.focus-card p{color:#c9d9d2;margin:0}.focus-side{border-left:1px solid rgba(255,255,255,.2);padding-left:28px;display:flex;flex-direction:column;justify-content:center}.focus-side strong{font-size:25px;color:#fff}.focus-side small{color:#b9cec5}.focus-side .btn{margin-top:18px;align-self:flex-start}
    .news-area{background:var(--paper)}.news-list{border-top:1px solid var(--line)}.news-item{display:grid;grid-template-columns:150px 1fr 110px;gap:24px;align-items:center;padding:24px 0;border-bottom:1px solid var(--line);transition:.2s}.news-item:hover{padding-left:10px;background:rgba(221,235,228,.25)}.thumb{height:94px;border-radius:14px;background:linear-gradient(135deg,var(--pine),#397263);display:flex;align-items:end;padding:12px;color:#fff;font-size:22px;font-weight:750;position:relative;overflow:hidden}.thumb:after{content:"NG28";position:absolute;right:-4px;bottom:-12px;font-size:35px;opacity:.16}.news-title{font-size:19px;color:var(--pine);font-weight:700;line-height:1.45;margin:8px 0 5px}.news-summary{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0}.news-meta{font-size:12px;color:#83918a}.read-link{color:var(--orange-dark);font-size:14px;font-weight:700;text-align:right}.read-link:hover{color:var(--pine)}.empty-state{padding:45px 20px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:var(--radius)}
    .tag-section{background:var(--sage)}.tag-cloud{display:flex;gap:12px;flex-wrap:wrap}.topic-tag{padding:12px 17px;background:rgba(255,255,255,.72);border:1px solid rgba(24,61,54,.1);border-radius:12px;color:var(--pine);font-weight:650}.topic-tag:hover{border-color:var(--orange);transform:translateY(-2px);transition:.2s}.timeline{position:relative;max-width:850px;margin-top:26px}.timeline:before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:var(--line)}.timeline-item{position:relative;padding:0 0 28px 38px}.timeline-item:before{content:"";position:absolute;left:2px;top:8px;width:14px;height:14px;border-radius:50%;background:var(--orange);border:3px solid var(--cream)}.timeline-date{font-size:13px;color:var(--orange-dark);font-weight:700}.timeline-item h3{font-size:19px;color:var(--pine);margin:4px 0}.timeline-item p{color:var(--muted);margin:0;font-size:14px}.category-panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:30px}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}.category-link{padding:20px;background:#fff;border:1px solid var(--line);border-radius:14px;transition:.2s}.category-link:hover{transform:translateY(-4px);border-color:var(--orange);box-shadow:var(--shadow-hover)}.category-link strong{display:block;color:var(--pine);font-size:17px}.category-link span{display:block;color:var(--muted);font-size:13px;margin-top:5px}.bottom-cta{padding:38px 0 92px}.cta-box{display:flex;justify-content:space-between;align-items:center;gap:30px;border:1px solid var(--pine);border-radius:var(--radius);padding:30px 34px;background:#f1eee7}.cta-box h2{font-size:25px;margin:0 0 6px}.cta-box p{margin:0;color:var(--muted)}
    .site-footer{background:var(--pine);color:#d8e6df;padding:62px 0 24px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:40px}.footer-brand .logo{color:#fff;margin-bottom:18px}.footer-brand p{color:#b8ccc3;font-size:14px;max-width:270px}.footer-col h3{font-size:15px;color:#fff;margin:0 0 15px}.footer-col a{display:block;color:#b8ccc3;font-size:14px;margin:9px 0;transition:.2s}.footer-col a:hover{color:#f7c3a3;transform:translateX(3px)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.15);margin-top:42px;padding-top:20px;color:#9eb6ac;font-size:12px}
    @media(max-width:992px){.header-inner{gap:15px}.main-nav a{padding:8px 8px;font-size:13px}.head-grid,.focus-card{grid-template-columns:1fr}.focus-side{border-left:0;border-top:1px solid rgba(255,255,255,.2);padding:22px 0 0}.news-item{grid-template-columns:120px 1fr 90px}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}}
    @media(max-width:768px){.container{width:min(100% - 32px,620px)}.site-header{height:68px}.header-actions .btn-outline{display:none}.main-nav{display:none}.menu-toggle{display:block}.header-inner{justify-content:space-between}.page-head{padding:52px 0 45px}.head-meta{justify-content:flex-start;margin-top:22px}.section{padding:58px 0}.section-head{display:block}.section-head .section-intro{margin-top:12px}.news-item{grid-template-columns:88px 1fr;gap:15px}.thumb{height:70px;font-size:17px}.read-link{grid-column:2;text-align:left}.category-grid{grid-template-columns:1fr}.cta-box{display:block}.cta-box .btn{margin-top:20px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}}
    @media(max-width:520px){h1{font-size:35px}.focus-card{padding:25px 22px}.news-title{font-size:17px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.header-actions .btn-primary{padding:0 13px;font-size:13px}.logo{font-size:16px}}

/* roulang page: category2 */
:root{
      --pine:#183d36;
      --pine-deep:#102f2a;
      --orange:#f47b38;
      --orange-dark:#d96225;
      --sage:#ddebe4;
      --cream:#f7f5f0;
      --paper:#fffdfa;
      --ink:#222a27;
      --muted:#69736e;
      --line:#d6e2dc;
      --soft-orange:#fce7d8;
      --radius:18px;
      --shadow:0 14px 35px rgba(24,61,54,.08);
      --shadow-hover:0 18px 42px rgba(24,61,54,.14);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--cream);color:var(--ink);font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(1180px,calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,250,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-weight:750;font-size:18px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--pine);display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:-1px;box-shadow:inset -5px -5px 0 rgba(244,123,56,.85)}
    .main-nav{display:flex;align-items:center;gap:7px;flex:1}
    .main-nav a{padding:9px 13px;border-radius:10px;color:#53615b;font-size:14px;transition:.18s}
    .main-nav a:hover,.main-nav a.active{background:var(--sage);color:var(--pine);font-weight:650}
    .header-actions{display:flex;align-items:center;gap:15px}
    .btn{min-height:46px;padding:0 20px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:650;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px);color:#fff}
    .btn-dark{background:var(--pine);color:#fff}
    .btn-dark:hover{background:var(--pine-deep);transform:translateY(-2px);color:#fff}
    .btn-outline{border-color:var(--pine);color:var(--pine);background:transparent}
    .btn-outline:hover{background:var(--sage);transform:translateY(-2px)}
    .btn:focus,a:focus,input:focus,textarea:focus{outline:3px solid rgba(244,123,56,.3);outline-offset:3px}
    .menu-toggle{display:none;background:none;color:var(--pine);font-size:25px}
    .page-intro{padding:72px 0 64px;background:var(--paper);border-bottom:1px solid var(--line)}
    .intro-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:60px;align-items:end}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}
    .breadcrumb a:hover{color:var(--orange-dark)}
    .breadcrumb span{color:#a1aaa5}
    .eyebrow,.section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--orange-dark);font-size:13px;font-weight:750;letter-spacing:.04em}
    .eyebrow:before,.section-kicker:before{content:"";width:24px;height:2px;background:var(--orange)}
    .page-intro h1{font-size:clamp(34px,4.5vw,52px);line-height:1.22;letter-spacing:-.045em;color:var(--pine);margin:16px 0 18px}
    .intro-copy{max-width:680px;color:var(--muted);font-size:17px;margin:0}
    .intro-meta{display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}
    .tag{display:inline-flex;align-items:center;padding:8px 13px;background:var(--sage);border-radius:30px;color:var(--pine);font-size:13px;font-weight:650}
    .tag.orange{background:var(--soft-orange);color:var(--orange-dark)}
    .section{padding:86px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section h2{font-size:32px;line-height:1.25;letter-spacing:-.035em;color:var(--pine);margin:10px 0 0}
    .section-intro{max-width:550px;color:var(--muted);font-size:15px;margin:0}
    .download-section{background:var(--sage)}
    .download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .download-card{background:var(--paper);border:1px solid rgba(24,61,54,.12);border-radius:var(--radius);padding:28px;min-height:310px;display:flex;flex-direction:column;transition:.2s;box-shadow:var(--shadow)}
    .download-card:hover{transform:translateY(-4px);border-color:var(--orange);box-shadow:var(--shadow-hover)}
    .download-icon{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:var(--pine);color:#fff;font-size:22px;margin-bottom:22px}
    .download-card:nth-child(2) .download-icon{background:var(--orange)}
    .download-card:nth-child(3) .download-icon{background:#6f8e80}
    .download-card h3{color:var(--pine);font-size:21px;margin:0 0 10px}
    .download-card p{color:var(--muted);font-size:14px;margin:0 0 18px}
    .download-card .btn{margin-top:auto;width:100%}
    .qr-box{height:64px;border:1px dashed #a8bbb1;border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:12px;margin:0 0 15px;background:#fbfcfa}
    .preview-section{background:var(--paper)}
    .preview-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}
    .device-stage{min-height:410px;background:var(--pine);border-radius:28px;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(221,235,228,.2);border-radius:50%}
    .device-stage:before{width:350px;height:350px}
    .device-stage:after{width:470px;height:470px}
    .phone{width:190px;height:365px;background:#101f1c;border:7px solid #34584f;border-radius:29px;padding:9px;position:relative;z-index:1;box-shadow:0 18px 30px rgba(0,0,0,.25)}
    .phone-screen{height:100%;border-radius:19px;background:#f8fbf8;overflow:hidden}
    .phone-top{height:57px;background:var(--sage);padding:12px 13px;color:var(--pine);font-size:11px;font-weight:750}
    .phone-top strong{display:block;font-size:15px}
    .phone-item{margin:10px;border-radius:10px;padding:11px;background:#fff;border:1px solid var(--line);font-size:10px;color:var(--muted)}
    .phone-item b{display:block;color:var(--pine);font-size:12px;margin-bottom:4px}
    .phone-nav{display:flex;justify-content:space-around;padding:10px 4px;color:var(--pine);font-size:10px;border-top:1px solid var(--line);margin-top:12px}
    .preview-copy h3{font-size:24px;color:var(--pine);margin:12px 0}
    .preview-copy p{color:var(--muted);margin:0 0 22px}
    .preview-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .preview-list div{padding:15px;background:var(--cream);border:1px solid var(--line);border-radius:12px;color:var(--pine);font-size:14px}
    .preview-list span{display:block;color:var(--orange-dark);font-size:12px;margin-bottom:4px}
    .steps-section{background:var(--cream)}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
    .steps:before{content:"";height:2px;background:var(--line);position:absolute;top:24px;left:10%;right:10%}
    .step{position:relative;text-align:center;padding:0 15px}
    .step-number{width:50px;height:50px;background:var(--orange);border:7px solid var(--cream);border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:750;margin:0 auto 18px;position:relative;z-index:1}
    .step h3{font-size:18px;color:var(--pine);margin:0 0 8px}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .safety-note{margin-top:30px;padding:18px 22px;border-radius:13px;background:#fff;border-left:4px solid var(--orange);color:var(--muted);font-size:14px}
    .faq-section{background:var(--paper)}
    .faq-wrap{max-width:850px;margin:auto}
    details{border-bottom:1px solid var(--line);padding:0}
    details summary{list-style:none;cursor:pointer;padding:21px 5px;color:var(--pine);font-weight:700;font-size:17px;display:flex;justify-content:space-between;gap:20px}
    details summary::-webkit-details-marker{display:none}
    details summary:after{content:"+";font-size:24px;color:var(--orange);font-weight:400;line-height:1}
    details[open] summary:after{content:"−"}
    details p{color:var(--muted);font-size:15px;padding:0 38px 21px 5px;margin:0}
    .related-section{background:var(--sage)}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .related-card{background:rgba(255,253,250,.82);border:1px solid rgba(24,61,54,.12);border-radius:var(--radius);padding:25px;transition:.2s}
    .related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:var(--orange)}
    .related-card h3{font-size:19px;color:var(--pine);margin:0 0 8px}
    .related-card p{font-size:14px;color:var(--muted);margin:0 0 18px}
    .text-link{color:var(--orange-dark);font-weight:700;font-size:14px}
    .text-link:hover{text-decoration:underline}
    .support-section{padding:74px 0}
    .support-box{background:var(--pine);color:#fff;border-radius:var(--radius);padding:42px 48px;display:flex;justify-content:space-between;align-items:center;gap:28px}
    .support-box h2{font-size:28px;margin:0 0 8px;color:#fff}
    .support-box p{color:#c9d9d1;margin:0;max-width:620px}
    .support-box .btn-outline{border-color:#d7e7df;color:#fff}
    .support-box .btn-outline:hover{background:rgba(255,255,255,.12)}
    .site-footer{background:var(--pine);color:#d8e5de;padding:62px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px;padding-bottom:45px}
    .footer-brand .logo{color:#fff;margin-bottom:17px}
    .footer-brand p{color:#b9cdc3;font-size:14px;max-width:290px;margin:0}
    .footer-col{display:flex;flex-direction:column;gap:10px}
    .footer-col h3{color:#fff;font-size:15px;margin:0 0 7px}
    .footer-col a{color:#b9cdc3;font-size:14px;transition:.18s}
    .footer-col a:hover{color:#f7b18c;padding-left:3px}
    .footer-bottom{border-top:1px solid rgba(221,235,228,.18);padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#9eb7aa;font-size:12px}
    @media(max-width:992px){
      .header-inner{gap:18px}
      .main-nav{gap:2px}
      .main-nav a{padding:8px 9px;font-size:13px}
      .intro-grid,.preview-grid{grid-template-columns:1fr;gap:28px}
      .intro-meta{justify-content:flex-start}
      .footer-grid{grid-template-columns:1.3fr repeat(3,1fr);gap:22px}
    }
    @media(max-width:768px){
      .container{width:min(100% - 32px,600px)}
      .site-header{height:68px}
      .header-inner{justify-content:space-between}
      .main-nav{display:none;position:absolute;top:68px;left:16px;right:16px;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:10px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}
      .main-nav a{padding:12px 14px}
      .header-actions .btn{min-height:40px;padding:0 13px;font-size:13px}
      .menu-toggle{display:block}
      .section{padding:64px 0}
      .page-intro{padding:52px 0 46px}
      .page-intro h1{font-size:38px}
      .download-grid,.related-grid{grid-template-columns:1fr}
      .download-card{min-height:0}
      .preview-grid{gap:38px}
      .device-stage{min-height:360px}
      .steps{grid-template-columns:1fr;gap:28px}
      .steps:before{width:2px;height:calc(100% - 48px);left:24px;top:24px;right:auto}
      .step{text-align:left;padding:0 0 0 72px;min-height:54px}
      .step-number{position:absolute;left:0;top:0;margin:0}
      .step h3{padding-top:5px}
      .support-box{padding:30px 25px;display:block}
      .support-box .btn{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-brand{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:8px}
    }
    @media(max-width:520px){
      .logo{font-size:15px}
      .logo-mark{width:30px;height:30px}
      .header-actions .btn{display:none}
      .page-intro h1{font-size:32px}
      .section h2{font-size:27px}
      .preview-list{grid-template-columns:1fr}
      .phone{width:174px;height:335px}
      .device-stage{min-height:335px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 15px}
      .footer-brand{grid-column:1/-1}
    }

/* roulang page: category3 */
:root{
      --pine:#183d36;
      --pine-deep:#102f2a;
      --orange:#f47b38;
      --orange-dark:#d96225;
      --sage:#ddebe4;
      --cream:#f7f5f0;
      --paper:#fffdfa;
      --ink:#222a27;
      --muted:#69736e;
      --line:#d6e2dc;
      --radius:18px;
      --shadow:0 14px 35px rgba(24,61,54,.08);
      --shadow-hover:0 18px 42px rgba(24,61,54,.14);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--cream);color:var(--ink);font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    button{cursor:pointer;border:0}
    .container{width:min(1180px,calc(100% - 48px));margin:auto}
    .site-header{height:78px;background:rgba(255,253,250,.95);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px);box-shadow:0 4px 18px rgba(24,61,54,.03)}
    .header-inner{height:100%;display:flex;align-items:center;gap:34px}
    .logo{display:flex;align-items:center;gap:10px;color:var(--pine);font-weight:750;font-size:18px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border-radius:11px;background:var(--pine);display:grid;place-items:center;color:#fff;font-size:13px;letter-spacing:-1px;box-shadow:inset -5px -5px 0 rgba(244,123,56,.85)}
    .main-nav{display:flex;align-items:center;gap:7px;flex:1}
    .main-nav a{padding:9px 13px;border-radius:10px;color:#53615b;font-size:14px;transition:.18s}
    .main-nav a:hover,.main-nav a.active{background:var(--sage);color:var(--pine);font-weight:650}
    .header-actions{display:flex;align-items:center;gap:15px}
    .btn{min-height:46px;padding:0 20px;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:650;transition:.2s;border:1px solid transparent}
    .btn-primary{background:var(--orange);color:#fff}
    .btn-primary:hover{background:var(--orange-dark);transform:translateY(-2px)}
    .btn-dark{background:var(--pine);color:#fff}
    .btn-dark:hover{background:var(--pine-deep);transform:translateY(-2px)}
    .btn-outline{border-color:var(--pine);color:var(--pine);background:transparent}
    .btn-outline:hover{background:var(--sage);transform:translateY(-2px)}
    .btn:focus,a:focus,button:focus{outline:3px solid rgba(244,123,56,.3);outline-offset:3px}
    .menu-toggle{display:none;background:none;color:var(--pine);font-size:25px}
    .page-head{padding:72px 0 66px;background:var(--paper);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:25px}
    .breadcrumb a:hover{color:var(--orange-dark)}
    .breadcrumb span{color:#aab6b0}
    .head-layout{display:flex;align-items:end;justify-content:space-between;gap:40px}
    .section-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--orange-dark);font-size:13px;font-weight:750;letter-spacing:.05em}
    .section-kicker:before{content:"";width:24px;height:2px;background:var(--orange)}
    .page-head h1{color:var(--pine);font-size:clamp(34px,5vw,52px);line-height:1.2;letter-spacing:-.05em;margin:16px 0 17px}
    .head-copy{max-width:700px;color:var(--muted);font-size:17px;margin:0}
    .head-tags{display:flex;gap:9px;flex-wrap:wrap;justify-content:flex-end}
    .badge{display:inline-flex;padding:6px 12px;background:#fce7d8;color:var(--orange-dark);border-radius:20px;font-size:12px;font-weight:700}
    .section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:30px}
    .section h2{font-size:31px;line-height:1.25;letter-spacing:-.035em;color:var(--pine);margin:10px 0 0}
    .section-intro{color:var(--muted);max-width:560px;font-size:15px;margin:0}
    .path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .path-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px 22px;box-shadow:var(--shadow);position:relative;transition:.2s}
    .path-card:hover,.guide-card:hover,.tip-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:#efb18d}
    .step-no{width:38px;height:38px;border-radius:12px;background:var(--pine);color:#fff;display:grid;place-items:center;font-weight:750;margin-bottom:20px}
    .path-card h3,.guide-card h3{font-size:19px;color:var(--pine);margin:0 0 8px}
    .path-card p,.guide-card p{font-size:14px;color:var(--muted);margin:0}
    .guide-section{background:var(--sage)}
    .guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:17px}
    .guide-card{background:rgba(255,253,250,.9);border:1px solid rgba(24,61,54,.13);border-radius:var(--radius);padding:23px;display:flex;gap:18px;transition:.2s}
    .guide-card .step-no{flex:0 0 38px;background:var(--orange)}
    .guide-link{display:inline-flex;color:var(--orange-dark);font-size:13px;font-weight:700;margin-top:14px}
    .guide-link:hover{color:var(--pine)}
    .map-section{background:var(--paper)}
    .route-map{display:flex;align-items:center;justify-content:center;gap:0;max-width:970px;margin:auto}
    .route-node{min-width:190px;text-align:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:23px 16px;box-shadow:var(--shadow)}
    .route-node strong{display:block;color:var(--pine);font-size:17px;margin-bottom:5px}
    .route-node small{color:var(--muted);font-size:13px}
    .route-line{height:2px;width:70px;background:var(--orange);position:relative}
    .route-line:after{content:"›";position:absolute;right:-2px;top:-16px;color:var(--orange);font-size:24px}
    .tips-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .tip-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px 18px;transition:.2s}
    .tip-icon{width:35px;height:35px;border-radius:10px;background:#fce7d8;color:var(--orange-dark);display:grid;place-items:center;font-weight:750;margin-bottom:13px}
    .tip-item h3{font-size:17px;color:var(--pine);margin:0 0 6px}
    .tip-item p{font-size:13px;color:var(--muted);margin:0}
    .related-section{background:var(--paper)}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}
    .related-card{background:var(--cream);border:1px solid var(--line);border-radius:16px;padding:22px;transition:.2s}
    .related-card:hover{border-color:var(--orange);transform:translateY(-3px);box-shadow:var(--shadow)}
    .related-card h3{color:var(--pine);font-size:18px;margin:0 0 7px}
    .related-card p{color:var(--muted);font-size:14px;margin:0 0 15px}
    .related-card .guide-link{margin:0}
    .faq-wrap{max-width:850px}
    .faq-item{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:11px;overflow:hidden}
    .faq-item summary{cursor:pointer;padding:18px 21px;color:var(--pine);font-weight:700;list-style:none;position:relative;padding-right:48px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";position:absolute;right:20px;color:var(--orange);font-size:22px;font-weight:400;top:13px}
    .faq-item[open] summary:after{content:"−"}
    .faq-answer{padding:0 21px 20px;color:var(--muted);font-size:14px}
    .support-box{margin-top:30px;border-radius:var(--radius);background:var(--pine);color:#fff;padding:30px 34px;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .support-box h3{margin:0 0 5px;font-size:22px}
    .support-box p{margin:0;color:#c9ddd4;font-size:14px}
    .site-footer{background:var(--pine);color:#fff;padding:65px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:45px}
    .footer-brand p{color:#bdd0c7;font-size:14px;max-width:280px;margin-top:16px}
    .site-footer .logo{color:#fff}
    .footer-col{display:flex;flex-direction:column;gap:9px}
    .footer-col h3{font-size:15px;color:#fff;margin:0 0 9px}
    .footer-col a{font-size:13px;color:#bdd0c7;transition:.18s}
    .footer-col a:hover{color:#f7b087;padding-left:3px}
    .footer-bottom{border-top:1px solid rgba(221,235,228,.2);margin-top:45px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#9eb8ad;font-size:12px}
    @media(max-width:992px){
      .header-inner{gap:18px}.main-nav a{padding:8px 8px;font-size:13px}
      .head-layout{align-items:start;flex-direction:column}.head-tags{justify-content:flex-start}
      .path-grid,.tips-grid{grid-template-columns:repeat(2,1fr)}
      .route-node{min-width:150px}.route-line{width:40px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(100% - 34px,620px)}
      .site-header{height:68px}.header-inner{justify-content:space-between}
      .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);padding:14px 18px 20px;box-shadow:0 12px 20px rgba(24,61,54,.1);flex-direction:column;align-items:stretch}
      .main-nav.open{display:flex}.main-nav a{padding:12px 14px}
      .header-actions .btn{min-height:40px;padding:0 13px;font-size:13px}.menu-toggle{display:block}
      .page-head{padding:50px 0 48px}.section{padding:58px 0}
      .path-grid,.guide-grid,.tips-grid,.related-grid{grid-template-columns:1fr}
      .route-map{align-items:stretch;flex-direction:column}.route-node{min-width:0}.route-line{height:35px;width:2px;margin:auto}.route-line:after{right:auto;left:-7px;top:20px;transform:rotate(90deg)}
      .support-box{align-items:flex-start;flex-direction:column;padding:25px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
      .footer-bottom{flex-direction:column;margin-top:32px}
    }
    @media(max-width:520px){
      .logo{font-size:15px}.logo-mark{width:31px;height:31px}
      .header-actions .btn{display:none}.section-head{display:block}.section-intro{margin-top:12px}
      .footer-grid{grid-template-columns:1fr}
    }