/* roulang page: index */
:root{
  --green:#17665c;--green-deep:#124d46;--green-soft:#e7f0ec;--sand:#d99b54;
  --sand-soft:#f7efe2;--paper:#fff;--bg:#f7f6f1;--ink:#1c2927;--muted:#65726e;
  --line:#e2e7e2;--danger:#b85c4d;--radius:14px;--shadow:0 8px 24px rgba(27,45,40,.07);
  --container:1200px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;display:block}.container{width:min(var(--container),calc(100% - 64px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid transparent;transition:.2s}.header-inner{height:76px;display:flex;align-items:center;gap:34px}.brand{display:flex;align-items:center;gap:11px;min-width:250px}.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}.brand-text{font-size:17px;font-weight:800;line-height:1.25}.brand-text small{display:block;color:var(--green);font-size:11px;font-weight:600;letter-spacing:.08em}.nav{display:flex;align-items:center;gap:24px;flex:1}.nav a{font-size:14px;color:#56635f;padding:25px 0 21px;border-bottom:2px solid transparent;white-space:nowrap}.nav a:hover,.nav a.active{color:var(--green);border-color:var(--green)}.header-action{white-space:nowrap}.menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--green);border-radius:9px;padding:7px 11px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;cursor:pointer}.btn-primary{background:var(--green);color:#fff}.btn-primary:hover{background:var(--green-deep);transform:translateY(-1px)}.btn-secondary{background:#fff;color:var(--green);border-color:var(--green)}.btn-secondary:hover{background:var(--green-soft);transform:translateY(-1px)}.section{padding:88px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:.05em}.eyebrow:before{content:"";width:22px;height:2px;background:var(--sand)}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(32px,4vw,48px);line-height:1.2;letter-spacing:-.04em;margin:16px 0 20px}h2{font-size:30px;line-height:1.3;margin:8px 0}h3{font-size:19px;line-height:1.4;margin:0 0 8px}.lead{font-size:17px;color:var(--muted);max-width:650px}.muted{color:var(--muted);font-size:14px}.hero{padding:78px 0 62px;background:linear-gradient(120deg,var(--bg),var(--green-soft));overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr .9fr;gap:70px;align-items:center}.hero-actions{display:flex;gap:12px;margin:30px 0 32px}.trust-row{display:flex;gap:25px;flex-wrap:wrap}.trust-item{display:flex;align-items:center;gap:8px;color:#53625d;font-size:13px}.trust-icon{color:var(--green);font-size:18px}.route-board{background:#fff;border:1px solid var(--line);border-radius:20px;padding:23px;box-shadow:var(--shadow);position:relative}.route-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.route-title{font-weight:800}.status{font-size:12px;color:var(--green);background:var(--green-soft);padding:4px 9px;border-radius:20px}.route-line{display:flex;align-items:center;gap:12px;padding:14px 12px;border:1px solid var(--line);border-radius:11px;margin:10px 0;background:#fff}.route-line b{font-size:14px}.route-line span{margin-left:auto;color:var(--green);font-size:20px}.route-line.feature{background:var(--sand-soft);border-color:#ead4b5}.device-strip{display:flex;align-items:center;gap:14px;margin-top:20px;padding-top:17px;border-top:1px solid var(--line)}.device-box{width:72px;height:86px;border:4px solid var(--green);border-radius:13px;padding:8px;background:var(--green-soft)}.device-box i{display:block;height:5px;background:var(--green);margin:7px 0;border-radius:3px}.device-copy{font-size:13px;color:var(--muted)}.mini-label{display:inline-block;color:var(--green);background:var(--green-soft);border-radius:6px;padding:2px 7px;font-size:12px;margin-bottom:9px}.matrix{display:grid;grid-template-columns:1.35fr 1fr 1fr;grid-template-rows:1fr 1fr;gap:16px}.entry-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:145px;display:flex;flex-direction:column;transition:.2s}.entry-card:hover,.info-card:hover,.article-row:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}.entry-card.large{grid-row:span 2;background:var(--green);color:#fff}.entry-card.large .mini-label{background:rgba(255,255,255,.17);color:#fff}.entry-card p{color:var(--muted);font-size:14px;margin-bottom:14px}.entry-card.large p{color:#d9ebe6}.entry-arrow{margin-top:auto;text-align:right;color:var(--green);font-size:20px}.large .entry-arrow{color:#fff}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative}.step{padding:24px 30px 24px 0;position:relative}.step:not(:last-child):after{content:"";position:absolute;top:43px;right:25px;width:calc(100% - 100px);height:1px;background:#bed3ca}.step-num{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#fff;font-weight:800;margin-bottom:15px;position:relative;z-index:1}.download-section{background:var(--sand-soft)}.download-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}.phone{width:190px;height:330px;background:var(--green-deep);border:8px solid #143f3a;border-radius:28px;padding:30px 14px 15px;margin:auto;box-shadow:12px 16px 0 rgba(217,155,84,.28)}.phone-screen{background:#f4f8f5;border-radius:15px;height:100%;padding:16px 10px}.phone-screen strong{font-size:12px;color:var(--green)}.screen-bar{height:9px;background:#bcd6cb;border-radius:5px;margin:12px 0}.screen-bar.short{width:62%}.screen-list{border:1px solid #d5e3dd;border-radius:8px;padding:10px;margin-top:10px;background:#fff}.screen-list em{display:block;width:70%;height:6px;background:var(--green);opacity:.7;border-radius:5px;margin-bottom:7px}.download-info{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin:24px 0}.data-box{background:#fff;border:1px solid #eadbc3;border-radius:10px;padding:13px}.data-box small{display:block;color:var(--muted);font-size:12px}.data-box b{font-size:15px}.download-actions{display:flex;align-items:center;gap:25px}.qr{width:82px;height:82px;background:repeating-linear-gradient(45deg,#1c2927 0 4px,#fff 4px 8px);border:7px solid #fff;outline:1px solid #d8d5cd}.split{display:grid;grid-template-columns:.8fr 1.2fr;gap:24px}.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;transition:.2s}.tag-list{display:flex;gap:9px;flex-wrap:wrap;margin-top:18px}.tag{border:1px solid var(--line);border-radius:8px;padding:9px 13px;background:var(--bg);font-size:14px}.tag.active{background:var(--green);color:#fff;border-color:var(--green)}.timeline{border-left:2px solid #c7dbd3;padding-left:22px}.timeline-item{position:relative;padding-bottom:22px}.timeline-item:before{content:"";position:absolute;left:-30px;top:8px;width:10px;height:10px;border-radius:50%;background:var(--sand);border:3px solid var(--bg)}.timeline-item time,.article-meta{font-size:12px;color:var(--muted)}.timeline-item p{font-size:14px;color:var(--muted);margin:4px 0}.guide-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.guide-list details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 18px}.guide-list summary{cursor:pointer;font-weight:700}.guide-list details p{color:var(--muted);font-size:14px;margin:12px 0 0}.channel-strip{display:flex;gap:14px;overflow:auto;padding-bottom:8px}.channel{min-width:170px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.channel:hover{border-color:var(--green);background:var(--green-soft)}.channel b{display:block;margin-bottom:5px}.channel span{font-size:13px;color:var(--muted)}.article-flow{border-top:1px solid var(--line)}.article-row{display:grid;grid-template-columns:115px 1fr 30px;gap:24px;padding:21px 15px;border-bottom:1px solid var(--line);transition:.2s}.article-row time{font-size:13px;color:var(--muted)}.article-row h3{margin:3px 0}.article-row p{font-size:14px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.article-arrow{color:var(--green);font-size:22px}.empty-state{text-align:center;padding:34px;color:var(--muted);border:1px dashed #cbd8d2;border-radius:12px}.checklist{list-style:none;padding:0;margin:0}.checklist li{padding:13px 0;border-bottom:1px solid var(--line);font-size:15px}.checklist li:before{content:"✓";display:inline-grid;place-items:center;width:21px;height:21px;background:var(--green-soft);color:var(--green);border-radius:50%;margin-right:10px;font-weight:800}.guide-feature{background:var(--green);color:#fff;min-height:100%;padding:28px;border-radius:var(--radius)}.guide-feature p{color:#d7ebe5;font-size:14px}.guide-feature .tag{background:rgba(255,255,255,.13);border-color:transparent;color:#fff}.notice{background:var(--green-soft);border-radius:16px;padding:31px;display:grid;grid-template-columns:1.1fr 1fr;gap:35px;align-items:center}.notice-items{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.notice-item{background:#fff;border-radius:10px;padding:17px;font-size:14px}.notice-item b{display:block;margin-bottom:5px;color:var(--green)}.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.faq-grid details{background:#fff;border:1px solid var(--line);border-radius:11px;padding:18px}.faq-grid summary{font-weight:700;cursor:pointer}.faq-grid p{font-size:14px;color:var(--muted);margin:10px 0 0}.cta{background:var(--green-deep);color:#fff;border-radius:18px;padding:45px 55px;display:flex;justify-content:space-between;align-items:center;gap:30px}.cta p{color:#cfe2dc;margin:8px 0 0}.cta .btn-secondary{background:transparent;color:#fff;border-color:#9fc4b8}.cta .btn-secondary:hover{background:rgba(255,255,255,.1)}.footer{background:#172c29;color:#dce9e4;padding:55px 0 20px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:50px}.footer .brand-text{color:#fff}.footer h3{font-size:15px;color:#fff}.footer a{display:block;color:#b8cbc5;font-size:14px;margin:7px 0}.footer a:hover{color:#fff}.footer-note{color:#a9beb7;font-size:13px;max-width:260px}.copyright{border-top:1px solid rgba(255,255,255,.13);margin-top:40px;padding-top:17px;color:#91a8a1;font-size:12px;display:flex;justify-content:space-between;gap:20px}
@media(max-width:1024px){.container{width:min(var(--container),calc(100% - 48px))}.nav{gap:14px}.brand{min-width:220px}.hero-grid,.download-grid{gap:35px}.matrix{grid-template-columns:1fr 1fr}.entry-card.large{grid-row:auto;grid-column:span 2}.section{padding:70px 0}}
@media(max-width:768px){.container{width:calc(100% - 32px)}.header-inner{height:68px;justify-content:space-between}.brand{min-width:0}.nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;padding:8px 16px 18px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0}.nav.open{display:flex}.nav a{padding:11px 4px;border-bottom:1px solid var(--line)}.header-action{display:none}.menu-btn{display:block}.hero{padding:55px 0 45px}.hero-grid,.download-grid,.split,.notice{grid-template-columns:1fr}.hero-grid{gap:38px}h1{font-size:34px}.section{padding:58px 0}.section-head{display:block}.section-head .muted{display:block;margin-top:10px}.steps{grid-template-columns:1fr;padding-left:20px}.step{padding:0 0 25px 33px;border-left:1px solid #bed3ca}.step:not(:last-child):after{top:auto;bottom:0;left:-1px;width:1px;height:25px}.step-num{position:absolute;left:-18px;top:0}.download-grid{gap:40px}.download-actions{flex-wrap:wrap}.notice-items{grid-template-columns:1fr}.cta{display:block;padding:35px 28px}.cta .actions{margin-top:25px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:span 2}}
@media(max-width:520px){.hero-actions{display:grid;grid-template-columns:1fr}.matrix,.guide-list,.faq-grid{grid-template-columns:1fr}.entry-card.large{grid-column:auto}.article-row{grid-template-columns:1fr 25px;gap:5px 15px}.article-row time{grid-column:1}.article-row>div:nth-child(2){grid-column:1}.article-arrow{grid-column:2;grid-row:1 / span 2}.download-info{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.copyright{display:block}.copyright span{display:block;margin-top:7px}}
:focus-visible{outline:3px solid rgba(217,155,84,.65);outline-offset:3px}

/* roulang page: article */
:root{
  --green:#17665c;--green-deep:#124d46;--green-soft:#e7f0ec;--sand:#d99b54;
  --sand-soft:#f7efe2;--paper:#fff;--bg:#f7f6f1;--ink:#1c2927;--muted:#65726e;
  --line:#e2e7e2;--danger:#b85c4d;--radius:14px;--shadow:0 8px 24px rgba(27,45,40,.07);
  --container:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit}
.container{width:min(var(--container),calc(100% - 64px));margin:auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid transparent;backdrop-filter:blur(8px);transition:.2s}
.site-header:hover{border-color:var(--line)}
.header-inner{height:76px;display:flex;align-items:center;gap:34px}
.brand{display:flex;align-items:center;gap:11px;min-width:250px}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
.brand-text{font-size:17px;font-weight:800;line-height:1.25}
.brand-text small{display:block;color:var(--green);font-size:11px;font-weight:600;letter-spacing:.08em}
.nav{display:flex;align-items:center;gap:24px;flex:1}
.nav a{font-size:14px;color:#56635f;padding:25px 0 21px;border-bottom:2px solid transparent;white-space:nowrap;transition:.2s}
.nav a:hover,.nav a.active{color:var(--green);border-color:var(--green)}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--green);border-radius:9px;padding:7px 11px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;cursor:pointer}
.btn:focus,a:focus,summary:focus{outline:3px solid rgba(23,102,92,.2);outline-offset:3px}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-deep);color:#fff;transform:translateY(-1px)}
.btn-secondary{background:#fff;color:var(--green);border-color:var(--green)}
.btn-secondary:hover{background:var(--green-soft);transform:translateY(-1px)}
.section{padding:44px 0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:.05em}
.eyebrow:before{content:"";width:22px;height:2px;background:var(--sand)}
.muted{color:var(--muted);font-size:14px}
.article-top{padding:42px 0 28px;background:linear-gradient(125deg,#f7f6f1 15%,var(--green-soft) 100%)}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:24px}
.breadcrumb span{color:#9aa39f}
.article-heading{max-width:900px}
.article-heading h1{font-size:clamp(30px,4.2vw,46px);line-height:1.27;letter-spacing:-.035em;margin:12px 0 17px;font-weight:800}
.article-meta-line{display:flex;gap:11px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:13px}
.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:20px;background:var(--green-soft);color:var(--green);font-size:12px;font-weight:800}
.badge.sand{background:var(--sand-soft);color:#91602b}
.read-layout{display:grid;grid-template-columns:220px minmax(0,790px);gap:52px;justify-content:center;padding-top:42px}
.article-side{position:sticky;top:102px;align-self:start}
.toc{padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
.toc b{display:block;font-size:14px;margin-bottom:10px}
.toc a{display:block;padding:7px 0;font-size:13px;color:var(--muted);border-bottom:1px solid #edf0ed;transition:.2s}
.toc a:last-child{border-bottom:0}
.toc a:hover{color:var(--green);padding-left:4px}
.article-main{min-width:0}
.summary-box{position:relative;background:var(--green-soft);border:1px solid #d3e4dd;border-radius:var(--radius);padding:23px 25px 23px 30px;margin-bottom:30px;color:#41534e}
.summary-box:before{content:"";position:absolute;left:0;top:20px;bottom:20px;width:4px;border-radius:0 4px 4px 0;background:var(--sand)}
.summary-box p{margin:0;font-size:16px}
.article-content{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,5vw,54px);box-shadow:var(--shadow)}
.article-content h2{font-size:28px;line-height:1.4;margin:42px 0 16px;padding-top:4px}
.article-content h3{font-size:21px;line-height:1.45;margin:30px 0 12px}
.article-content h2:first-child{margin-top:0}
.article-content p{margin:0 0 20px}
.article-content ul,.article-content ol{padding-left:1.5em;margin:0 0 22px}
.article-content li{margin:8px 0}
.article-content blockquote{margin:25px 0;padding:18px 22px;background:var(--sand-soft);border-left:4px solid var(--sand);color:#584733;border-radius:0 10px 10px 0}
.article-content table{display:block;max-width:100%;overflow:auto;width:100%;border-collapse:collapse;margin:25px 0}
.article-content th,.article-content td{border:1px solid var(--line);padding:11px 13px;text-align:left;font-size:14px}
.article-content th{background:var(--green-soft)}
.article-content img{border-radius:12px;margin:25px auto}
.article-content a{color:var(--green);font-weight:700;text-decoration:underline;text-decoration-color:rgba(23,102,92,.35);text-underline-offset:3px}
.empty-content{text-align:center;padding:55px 24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}
.empty-icon{width:48px;height:48px;margin:0 auto 15px;border-radius:14px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;font-size:22px}
.notice-card{margin-top:28px;padding:24px;border:1px solid #eadbc3;border-radius:var(--radius);background:var(--sand-soft)}
.notice-card h2{font-size:20px;margin:0 0 8px}
.notice-card p{margin:0;color:#695c4d;font-size:14px}
.notice-details{display:flex;gap:16px;flex-wrap:wrap;margin:15px 0}
.notice-details span{padding-right:16px;border-right:1px solid #dfc9aa;font-size:13px;color:#6d6257}
.notice-details span:last-child{border:0}
.related-wrap{margin-top:64px}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:22px}
.section-head h2{font-size:28px;margin:6px 0 0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related-card{display:flex;flex-direction:column;min-height:205px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:21px;transition:.2s}
.related-card:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}
.related-card h3{font-size:17px;line-height:1.45;margin:13px 0 9px}
.related-card p{font-size:13px;color:var(--muted);margin:0 0 14px}
.related-card .more{margin-top:auto;color:var(--green);font-size:13px;font-weight:800}
.return-panel{margin:70px 0 20px;padding:30px 34px;background:var(--green);color:#fff;border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;gap:24px}
.return-panel h2{font-size:24px;margin:0 0 4px}
.return-panel p{margin:0;color:#d6e8e2;font-size:14px}
.return-panel .btn-secondary{border-color:#fff;background:#fff;color:var(--green)}
.text-link{font-size:14px;color:var(--green);font-weight:800}
.text-link:hover{color:var(--green-deep)}
.footer{margin-top:80px;background:#173b36;color:#e7eee9;padding:54px 0 18px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px}
.footer .brand{min-width:0;color:#fff}
.footer .brand-text small{color:#b7d5ca}
.footer .brand-mark{background:var(--sand);color:#302419}
.footer-note{max-width:250px;color:#c4d1cb;font-size:14px;margin:16px 0 0}
.footer h3{font-size:14px;color:#fff;margin:4px 0 15px}
.footer-grid>div:not(:first-child){display:flex;flex-direction:column;gap:8px}
.footer-grid a:not(.brand){font-size:14px;color:#c4d1cb;transition:.2s}
.footer-grid a:not(.brand):hover{color:#fff;padding-left:3px}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:42px;padding-top:17px;display:flex;justify-content:space-between;gap:16px;color:#aabcb5;font-size:12px}
@media(max-width:1024px){
  .header-inner{gap:20px}.brand{min-width:220px}.read-layout{grid-template-columns:180px minmax(0,1fr);gap:28px}.related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .container{width:min(var(--container),calc(100% - 32px))}
  .header-inner{height:68px;gap:12px}.brand{min-width:0;flex:1}.brand-text{font-size:15px}.header-action{display:none}
  .menu-btn{display:block}.nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 16px 15px;box-shadow:var(--shadow)}
  .nav.open{display:flex;flex-direction:column;align-items:stretch;gap:0}.nav a{padding:12px 4px;border-bottom:1px solid #edf0ed}
  .article-top{padding:31px 0 18px}.read-layout{display:block;padding-top:28px}.article-side{position:static;margin-bottom:20px}.toc{display:flex;gap:8px;align-items:center;overflow:auto;padding:13px}.toc b{margin:0;white-space:nowrap}.toc a{white-space:nowrap;border:0;padding:4px 7px;background:var(--bg);border-radius:6px}
  .related-grid{grid-template-columns:1fr}.return-panel{margin-top:48px;display:block;padding:27px}.return-panel .btn{margin-top:18px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}
}
@media(max-width:520px){
  body{font-size:15px}.article-heading h1{font-size:30px}.article-meta-line{gap:8px}.article-content{padding:23px 19px}.article-content h2{font-size:24px;margin-top:34px}.article-content h3{font-size:19px}.summary-box{padding:20px 20px 20px 26px}.section-head{display:block}.section-head h2{font-size:24px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.copyright{display:block}.copyright span{display:block;margin:4px 0}
}

/* roulang page: category1 */
:root{
      --green:#17665c;--green-deep:#124d46;--green-soft:#e7f0ec;--sand:#d99b54;
      --sand-soft:#f7efe2;--paper:#fff;--bg:#f7f6f1;--ink:#1c2927;--muted:#65726e;
      --line:#e2e7e2;--danger:#b85c4d;--radius:14px;--shadow:0 8px 24px rgba(27,45,40,.07);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    button,input,textarea,select{font:inherit}
    button{border:0}
    img{max-width:100%;display:block}
    ::selection{background:#cde1da;color:var(--ink)}
    .container{width:min(var(--container),calc(100% - 64px));margin:auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid transparent;backdrop-filter:blur(10px);transition:.2s}
    .site-header:hover{border-color:var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:11px;min-width:250px}
    .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
    .brand-text{font-size:17px;font-weight:800;line-height:1.25}
    .brand-text small{display:block;color:var(--green);font-size:11px;font-weight:600;letter-spacing:.08em}
    .nav{display:flex;align-items:center;gap:24px;flex:1}
    .nav a{font-size:14px;color:#56635f;padding:25px 0 21px;border-bottom:2px solid transparent;white-space:nowrap;transition:.2s}
    .nav a:hover,.nav a.active{color:var(--green);border-color:var(--green)}
    .header-action{white-space:nowrap}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--green);border-radius:9px;padding:7px 11px;cursor:pointer}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;cursor:pointer}
    .btn:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid rgba(23,102,92,.22);outline-offset:3px}
    .btn-primary{background:var(--green);color:#fff}
    .btn-primary:hover{background:var(--green-deep);color:#fff;transform:translateY(-1px)}
    .btn-secondary{background:#fff;color:var(--green);border-color:var(--green)}
    .btn-secondary:hover{background:var(--green-soft);color:var(--green);transform:translateY(-1px)}
    .section{padding:82px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:.05em}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--sand)}
    .section h2{font-size:30px;line-height:1.35;letter-spacing:-.02em;margin:8px 0 0}
    .lead{font-size:16px;color:var(--muted);max-width:690px;margin:10px 0 0}
    .muted{color:var(--muted);font-size:14px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:8px;padding:6px 10px;background:var(--bg);font-size:12px;line-height:1.4;color:#52615c}
    .tag.sand{background:var(--sand-soft);border-color:#eed9bd;color:#815529}
    .tag.green{background:var(--green-soft);border-color:#d5e5de;color:var(--green)}
    .page-intro{padding:54px 0 44px;background:linear-gradient(112deg,#f7f6f1 0%,#f7f6f1 55%,#e7f0ec 100%);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:13px;margin-bottom:20px}
    .breadcrumb span{color:#a1aaa6}
    .intro-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:40px;align-items:end}
    .page-intro h1{font-size:44px;line-height:1.2;letter-spacing:-.04em;margin:9px 0 12px}
    .page-intro p{max-width:700px;color:var(--muted);font-size:16px;margin:0}
    .update-panel{background:#fff;border:1px solid #d9e7e0;border-radius:var(--radius);padding:17px 19px;box-shadow:var(--shadow)}
    .update-panel small{display:block;color:var(--muted);font-size:12px}
    .update-panel strong{font-size:15px;color:var(--green)}
    .steps-wrap{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .micro-steps{display:grid;grid-template-columns:repeat(3,1fr);position:relative}
    .micro-steps:before{content:"";position:absolute;left:13%;right:13%;top:22px;border-top:1px dashed #b7cbc3}
    .micro-step{position:relative;padding:0 24px 0 0;z-index:1}
    .step-no{width:44px;height:44px;display:grid;place-items:center;background:var(--green);color:#fff;border-radius:50%;font-weight:800;margin-bottom:12px}
    .micro-step:nth-child(2) .step-no{background:var(--sand)}
    .micro-step:nth-child(3) .step-no{background:#527c73}
    .micro-step h3{font-size:17px;margin:0 0 4px}
    .micro-step p{font-size:14px;color:var(--muted);margin:0;max-width:260px}
    .topic-grid{display:grid;grid-template-columns:1.25fr .85fr .9fr;grid-auto-rows:minmax(180px,auto);gap:16px}
    .topic-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;overflow:hidden;transition:.22s}
    .topic-card:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}
    .topic-card.featured{grid-row:span 2;background:var(--green);color:#fff;padding:30px}
    .topic-card.featured:after{content:"";position:absolute;width:210px;height:210px;border:1px solid rgba(255,255,255,.17);border-radius:50%;right:-75px;bottom:-92px}
    .card-icon{width:42px;height:42px;border-radius:11px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;margin-bottom:20px}
    .featured .card-icon{background:rgba(255,255,255,.16);color:#fff}
    .card-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
    .topic-card h3{font-size:21px;margin:0 0 7px;line-height:1.35}
    .topic-card p{font-size:14px;color:var(--muted);margin:0;max-width:330px}
    .featured p{color:#d8eae5;font-size:15px}
    .card-foot{position:absolute;right:20px;bottom:15px;color:var(--green);font-size:22px}
    .featured .card-foot{color:#fff}
    .recognition{background:var(--green-soft)}
    .recognition-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
    .recognition-item{background:rgba(255,255,255,.75);border:1px solid #d6e3dd;border-radius:12px;padding:20px;display:flex;align-items:flex-start;gap:13px}
    .recognition-item i{font-style:normal;width:29px;height:29px;flex:0 0 29px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--green);font-weight:800;border:1px solid #cfe0d8}
    .recognition-item b{display:block;font-size:15px;margin-bottom:2px}
    .recognition-item p{font-size:13px;color:var(--muted);margin:0}
    .content-shell{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
    .article-row{display:grid;grid-template-columns:125px 1fr 32px;gap:22px;align-items:center;padding:21px 24px;border-bottom:1px solid var(--line);transition:.2s}
    .article-row:last-child{border-bottom:none}
    .article-row:hover{background:#fbfcfa}
    .article-date time{display:block;font-size:14px;font-weight:800;color:var(--green)}
    .article-date span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .article-copy h3{font-size:17px;line-height:1.45;margin:7px 0 5px}
    .article-copy p{font-size:14px;color:var(--muted);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .article-arrow{color:var(--green);font-size:23px;text-align:right;transition:.2s}
    .article-row:hover .article-arrow{transform:translateX(3px)}
    .more-link{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-weight:800;font-size:14px;margin-top:20px}
    .more-link:hover{color:var(--green-deep)}
    .channel-band{background:var(--sand-soft)}
    .channel-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .channel-card{display:flex;align-items:center;justify-content:space-between;gap:15px;background:#fff;border:1px solid #eadbc4;border-radius:var(--radius);padding:20px 21px;transition:.2s}
    .channel-card:hover{border-color:var(--sand);box-shadow:var(--shadow);transform:translateY(-2px)}
    .channel-card .channel-name{font-size:17px;font-weight:800}
    .channel-card small{display:block;color:var(--muted);font-size:13px;margin-top:3px}
    .channel-card b{color:var(--green);font-size:21px}
    .faq-layout{display:grid;grid-template-columns:.84fr 1.16fr;gap:48px;align-items:start}
    .faq-note{background:var(--green);border-radius:var(--radius);padding:28px;color:#fff}
    .faq-note h2{font-size:28px;margin:8px 0 10px}
    .faq-note p{font-size:14px;color:#d8ebe5;margin:0}
    .faq-list{display:grid;gap:12px}
    .faq-list details{background:#fff;border:1px solid var(--line);border-radius:11px;padding:16px 18px;transition:.2s}
    .faq-list details[open]{border-color:#b9d4ca;box-shadow:0 5px 16px rgba(27,45,40,.05)}
    .faq-list summary{list-style:none;cursor:pointer;font-size:16px;font-weight:800;padding-right:26px;position:relative}
    .faq-list summary::-webkit-details-marker{display:none}
    .faq-list summary:after{content:"+";position:absolute;right:0;top:-3px;font-size:22px;font-weight:400;color:var(--green)}
    .faq-list details[open] summary:after{content:"−"}
    .faq-list p{color:var(--muted);font-size:14px;margin:11px 0 0}
    .footer{background:#173b35;color:#edf2ee;padding:54px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.45fr .8fr .8fr;gap:48px;padding-bottom:38px}
    .footer .brand{min-width:0;color:#fff}
    .footer .brand-mark{background:var(--sand)}
    .footer .brand-text small{color:#bdd6cd}
    .footer-note{max-width:230px;color:#c3d1cb;font-size:14px;margin:17px 0 0}
    .footer h3{font-size:14px;color:#fff;margin:0 0 13px}
    .footer-grid>div:not(:first-child){display:flex;flex-direction:column;align-items:flex-start;gap:8px}
    .footer-grid a:not(.brand){font-size:14px;color:#c3d1cb;transition:.2s}
    .footer-grid a:not(.brand):hover{color:#fff;transform:translateX(2px)}
    .copyright{border-top:1px solid rgba(255,255,255,.15);padding-top:18px;display:flex;justify-content:space-between;gap:16px;color:#b7c8c1;font-size:12px}
    @media (max-width:1024px){
      .header-inner{gap:20px}.brand{min-width:225px}.nav{gap:16px}
      .topic-grid{grid-template-columns:1.15fr 1fr}.topic-card.featured{grid-row:span 2}
      .topic-card:last-child{grid-column:span 2}.faq-layout{gap:28px}
    }
    @media (max-width:768px){
      .container{width:min(var(--container),calc(100% - 40px))}
      .header-inner{height:68px;gap:12px}.brand{min-width:0;flex:1}.brand-text{font-size:15px}.brand-text small{font-size:9px}
      .header-action{display:none}.menu-btn{display:block}
      .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 20px 16px;box-shadow:var(--shadow)}
      .nav.open{display:flex;flex-direction:column;align-items:stretch;gap:0}.nav a{padding:12px 4px;border-bottom:1px solid #edf0ed}.nav a.active{border-bottom-color:var(--green)}
      .section{padding:60px 0}.section-head{display:block;margin-bottom:23px}.section h2{font-size:27px}
      .page-intro{padding:40px 0 35px}.intro-layout{grid-template-columns:1fr;gap:21px}.page-intro h1{font-size:35px}.update-panel{width:100%;max-width:360px}
      .micro-steps{grid-template-columns:1fr;gap:20px}.micro-steps:before{left:21px;top:43px;bottom:42px;right:auto;border-left:1px dashed #b7cbc3;border-top:0}
      .micro-step{padding:0 0 0 60px}.step-no{position:absolute;left:0;top:0;margin:0}
      .topic-grid{grid-template-columns:1fr 1fr}.topic-card.featured{grid-row:auto;grid-column:span 2;min-height:230px}.topic-card:last-child{grid-column:auto}
      .recognition-grid,.channel-list{grid-template-columns:1fr}.faq-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1.2fr 1fr;gap:32px}.footer-grid>div:first-child{grid-column:span 2}
    }
    @media (max-width:520px){
      body{font-size:15px}.container{width:calc(100% - 32px)}.section{padding:48px 0}
      .page-intro h1{font-size:31px}.page-intro p,.lead{font-size:15px}
      .topic-grid{grid-template-columns:1fr}.topic-card.featured,.topic-card:last-child{grid-column:auto}.topic-card{min-height:180px}
      .article-row{grid-template-columns:1fr 24px;gap:13px;padding:18px 16px}.article-date{grid-column:1}.article-copy{grid-column:1}.article-arrow{grid-column:2;grid-row:1 / span 2}
      .footer-grid{grid-template-columns:1fr;gap:27px}.footer-grid>div:first-child{grid-column:auto}.copyright{display:block}.copyright span{display:block}.copyright span+span{margin-top:3px}
      .faq-note{padding:24px}.channel-card{padding:18px}.btn{width:100%}
    }

/* roulang page: category2 */
:root{
      --green:#17665c;
      --green-deep:#124d46;
      --green-soft:#e7f0ec;
      --sand:#d99b54;
      --sand-soft:#f7efe2;
      --paper:#fff;
      --bg:#f7f6f1;
      --ink:#1c2927;
      --muted:#65726e;
      --line:#e2e7e2;
      --danger:#b85c4d;
      --radius:14px;
      --shadow:0 8px 24px rgba(27,45,40,.07);
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      background:var(--bg);
      color:var(--ink);
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
      font-size:16px;
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button{font:inherit}
    .container{width:min(var(--container),calc(100% - 64px));margin:auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:20;
      background:rgba(255,255,255,.96);
      border-bottom:1px solid transparent;
      transition:.2s;
    }
    .header-inner{height:76px;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:11px;min-width:250px}
    .brand-mark{
      width:34px;height:34px;border-radius:10px;background:var(--green);
      color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px
    }
    .brand-text{font-size:17px;font-weight:800;line-height:1.25}
    .brand-text small{
      display:block;color:var(--green);font-size:11px;font-weight:600;letter-spacing:.08em
    }
    .nav{display:flex;align-items:center;gap:24px;flex:1}
    .nav a{
      font-size:14px;color:#56635f;padding:25px 0 21px;
      border-bottom:2px solid transparent;white-space:nowrap
    }
    .nav a:hover,.nav a.active{color:var(--green);border-color:var(--green)}
    .header-action{white-space:nowrap}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--green);
      border-radius:9px;padding:7px 11px
    }
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:10px;padding:11px 18px;
      font-weight:700;font-size:14px;transition:.2s;cursor:pointer
    }
    .btn-primary{background:var(--green);color:#fff}
    .btn-primary:hover{background:var(--green-deep);transform:translateY(-1px);color:#fff}
    .btn-secondary{background:#fff;color:var(--green);border-color:var(--green)}
    .btn-secondary:hover{background:var(--green-soft);transform:translateY(-1px);color:var(--green)}
    .section{padding:82px 0}
    .page-intro{
      padding:50px 0 42px;
      background:linear-gradient(120deg,var(--bg),var(--green-soft));
      border-bottom:1px solid var(--line)
    }
    .breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}
    .breadcrumb a{color:var(--green)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;color:var(--green);
      font-size:13px;font-weight:800;letter-spacing:.05em
    }
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--sand)}
    h1,h2,h3{line-height:1.25;margin-top:0}
    h1{font-size:44px;letter-spacing:-.03em;margin:12px 0 14px}
    h2{font-size:30px;margin-bottom:12px}
    h3{font-size:19px;margin-bottom:8px}
    .lead{font-size:17px;color:var(--muted);max-width:700px}
    .intro-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
    .tag,.badge{
      display:inline-flex;align-items:center;border-radius:8px;
      padding:7px 11px;font-size:13px;font-weight:700
    }
    .tag{background:var(--sand-soft);color:#865c2e;border:1px solid #eadbc3}
    .badge{background:var(--green-soft);color:var(--green)}
    .section-head{
      display:flex;justify-content:space-between;align-items:end;
      gap:24px;margin-bottom:30px
    }
    .muted{color:var(--muted);font-size:14px}
    .info-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .info-card{
      background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
      padding:22px;transition:.2s
    }
    .info-card:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}
    .info-card small{display:block;color:var(--muted);font-size:12px;margin-bottom:5px}
    .info-card strong{display:block;color:var(--green);font-size:18px}
    .download-panel{
      display:grid;grid-template-columns:.78fr 1.22fr;gap:46px;
      align-items:stretch;background:var(--sand-soft);border-radius:18px;padding:34px
    }
    .device-card{
      min-height:330px;border:9px solid #234d47;border-radius:32px;
      background:#fff;padding:24px 18px;box-shadow:0 12px 28px rgba(27,45,40,.12);
      max-width:230px;margin:auto;position:relative
    }
    .device-card:before{
      content:"";display:block;width:65px;height:5px;border-radius:8px;
      background:#d8dfda;margin:0 auto 25px
    }
    .device-top{font-size:13px;color:var(--muted);margin-bottom:16px}
    .device-title{font-size:20px;font-weight:800;color:var(--green);margin-bottom:18px}
    .device-line{
      height:11px;background:var(--green-soft);border-radius:8px;margin:10px 0
    }
    .device-line.short{width:62%;background:var(--sand-soft)}
    .device-route{
      border:1px solid var(--line);border-radius:9px;padding:12px;margin-top:20px;
      font-size:12px;color:var(--muted)
    }
    .download-copy{padding:8px 0}
    .download-copy h2{margin-bottom:16px}
    .download-copy p{color:var(--muted);margin-bottom:22px}
    .download-actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
    .download-detail{
      display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:25px
    }
    .download-detail div{
      background:#fff;border:1px solid #eadbc3;border-radius:10px;padding:13px
    }
    .download-detail small{display:block;color:var(--muted);font-size:12px}
    .download-detail b{font-size:14px}
    .content-split{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:start}
    .check-card,.guide-card{
      background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px
    }
    .checklist{list-style:none;padding:0;margin:18px 0 0}
    .checklist li{
      padding:14px 0;border-bottom:1px solid var(--line);font-size:15px
    }
    .checklist li:last-child{border-bottom:0}
    .checklist li:before{
      content:"✓";display:inline-grid;place-items:center;width:21px;height:21px;
      background:var(--green-soft);color:var(--green);border-radius:50%;
      margin-right:10px;font-weight:800
    }
    .guide-card{background:var(--green);color:#fff}
    .guide-card p{color:#d7ebe5}
    .guide-card .tag{background:rgba(255,255,255,.13);color:#fff;border-color:transparent}
    .guide-card ul{padding-left:20px;color:#e2f0ec;margin:20px 0}
    .article-list{border-top:1px solid var(--line)}
    .article-row{
      display:grid;grid-template-columns:110px 1fr 34px;gap:24px;
      padding:23px 15px;border-bottom:1px solid var(--line);
      background:transparent;transition:.2s
    }
    .article-row:hover{
      border-color:var(--green);background:#fff;box-shadow:var(--shadow);
      transform:translateY(-2px)
    }
    .article-row time{font-size:13px;color:var(--muted)}
    .article-row h3{margin:3px 0}
    .article-row p{
      font-size:14px;color:var(--muted);margin:0;
      display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden
    }
    .article-arrow{color:var(--green);font-size:22px}
    .more-link{
      display:inline-flex;align-items:center;gap:8px;color:var(--green);
      font-weight:700;font-size:14px;margin-top:22px
    }
    .more-link:hover{gap:12px;color:var(--green-deep)}
    .channel-section{background:var(--green-soft)}
    .channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .channel-card{
      background:#fff;border:1px solid #d6e4de;border-radius:var(--radius);
      padding:21px;display:flex;align-items:center;justify-content:space-between;
      transition:.2s
    }
    .channel-card:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}
    .channel-card strong{display:block;margin-bottom:4px}
    .channel-card span{font-size:13px;color:var(--muted)}
    .channel-card b{font-size:22px;color:var(--green);font-weight:400}
    .faq-grid{      display:grid;grid-template-columns:repeat(2,1fr);gap:14px
    }
    .faq-grid details{
      background:#fff;border:1px solid var(--line);border-radius:11px;padding:18px;
      transition:.2s
    }
    .faq-grid details[open]{border-color:var(--green);box-shadow:var(--shadow)}
    .faq-grid summary{font-weight:700;cursor:pointer;list-style:none;padding-right:24px;position:relative}
    .faq-grid summary::-webkit-details-marker{display:none}
    .faq-grid summary:after{
      content:"＋";position:absolute;right:0;top:-2px;color:var(--green);font-size:20px;font-weight:400
    }
    .faq-grid details[open] summary:after{content:"－"}
    .faq-grid p{font-size:14px;color:var(--muted);margin:12px 0 0}
    .notice-band{background:#e7f0ec}
    .notice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .notice-item{background:#fff;border-radius:11px;padding:20px;border:1px solid #d5e4de}
    .notice-icon{
      display:grid;place-items:center;width:36px;height:36px;border-radius:10px;
      color:var(--green);background:var(--green-soft);font-weight:800;margin-bottom:12px
    }
    .notice-item b{display:block;font-size:15px;margin-bottom:5px}
    .notice-item p{margin:0;color:var(--muted);font-size:14px}
    .footer{background:#1c3732;color:#edf4f0;padding:56px 0 18px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:50px}
    .footer .brand{min-width:0}
    .footer .brand-mark{background:var(--sand)}
    .footer .brand-text small{color:#bfd4cd}
    .footer-note{font-size:14px;color:#bfd4cd;margin:17px 0 0}
    .footer h3{font-size:14px;color:#fff;margin:3px 0 14px}
    .footer-grid div:not(:first-child) a{
      display:block;color:#bfd4cd;font-size:14px;margin:7px 0;transition:.2s
    }
    .footer-grid div:not(:first-child) a:hover{color:#fff;transform:translateX(3px)}
    .copyright{
      display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
      border-top:1px solid rgba(255,255,255,.16);margin-top:40px;padding-top:18px;
      color:#a8c0b8;font-size:12px
    }
    .section-alt{background:#fff}
    :focus-visible{outline:3px solid rgba(23,102,92,.28);outline-offset:3px}
    @media(max-width:1024px){
      .header-inner{gap:20px}
      .brand{min-width:220px}
      .nav{gap:16px}
      .download-panel{gap:30px}
      .info-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{position:relative}
      .header-inner{height:68px;gap:12px}
      .brand{min-width:0;flex:1}
      .brand-text{font-size:15px}
      .header-action{display:none}
      .menu-btn{display:block}
      .nav{
        display:none;position:absolute;top:68px;left:0;right:0;padding:12px 16px 18px;
        background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
        flex-direction:column;align-items:stretch;gap:0
      }
      .nav.open{display:flex}
      .nav a{padding:11px 0;border-bottom:1px solid var(--line)}
      .nav a:last-child{border-bottom:0}
      h1{font-size:32px}
      h2{font-size:26px}
      .section{padding:58px 0}
      .page-intro{padding:38px 0 34px}
      .section-head{align-items:start;flex-direction:column;margin-bottom:24px}
      .download-panel,.content-split{grid-template-columns:1fr}
      .download-panel{padding:24px}
      .device-card{min-height:290px}
      .channel-grid,.notice-grid{grid-template-columns:1fr}
      .faq-grid{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr;gap:30px}
    }
    @media(max-width:520px){
      body{font-size:15px}
      .info-grid{grid-template-columns:1fr}
      .download-detail{grid-template-columns:1fr}
      .download-actions{flex-direction:column}
      .download-actions .btn{width:100%}
      .article-row{grid-template-columns:1fr 25px;gap:8px 16px;padding:19px 8px}
      .article-row time{grid-column:1/-1}
      .article-arrow{grid-column:2;grid-row:2;align-self:center}
      .article-row h3,.article-row p{grid-column:1}
      .article-row h3{grid-row:2}
      .article-row p{grid-row:3}
      .copyright{flex-direction:column;gap:4px}
    }

/* roulang page: category3 */
:root{
      --green:#17665c;--green-deep:#124d46;--green-soft:#e7f0ec;--sand:#d99b54;
      --sand-soft:#f7efe2;--paper:#fff;--bg:#f7f6f1;--ink:#1c2927;--muted:#65726e;
      --line:#e2e7e2;--danger:#b85c4d;--radius:14px;--shadow:0 8px 24px rgba(27,45,40,.07);
      --container:1200px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.7}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid rgba(217,155,84,.55);outline-offset:3px}
    button{font:inherit}
    .container{width:min(var(--container),calc(100% - 64px));margin:0 auto}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid transparent}
    .header-inner{height:76px;display:flex;align-items:center;gap:34px}
    .brand{display:flex;align-items:center;gap:11px;min-width:250px}
    .brand-mark{width:34px;height:34px;border-radius:10px;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px}
    .brand-text{font-size:17px;font-weight:800;line-height:1.25}
    .brand-text small{display:block;color:var(--green);font-size:11px;font-weight:600;letter-spacing:.08em}
    .nav{display:flex;align-items:center;gap:24px;flex:1}
    .nav a{font-size:14px;color:#56635f;padding:25px 0 21px;border-bottom:2px solid transparent;white-space:nowrap}
    .nav a:hover,.nav a.active{color:var(--green);border-color:var(--green)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:11px 18px;font-weight:700;font-size:14px;transition:.2s;cursor:pointer}
    .btn-primary{background:var(--green);color:#fff}
    .btn-primary:hover{background:var(--green-deep);transform:translateY(-1px)}
    .btn-secondary{background:#fff;color:var(--green);border-color:var(--green)}
    .btn-secondary:hover{background:var(--green-soft);transform:translateY(-1px)}
    .header-action{white-space:nowrap}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--green);border-radius:9px;padding:7px 11px}
    .section{padding:76px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--green);font-size:13px;font-weight:800;letter-spacing:.05em}
    .eyebrow:before{content:"";width:22px;height:2px;background:var(--sand)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(32px,4vw,48px);line-height:1.2;letter-spacing:-.03em;margin:14px 0 16px}
    h2{font-size:clamp(26px,3vw,32px);line-height:1.3;margin-bottom:10px}
    h3{font-size:19px;line-height:1.4;margin-bottom:8px}
    .lead{font-size:17px;color:var(--muted);max-width:700px}
    .muted{color:var(--muted);font-size:14px}
    .page-intro{padding:58px 0 48px;background:linear-gradient(120deg,var(--bg),var(--green-soft));border-bottom:1px solid var(--line)}
    .crumbs{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}
    .crumbs span{color:#a0aaa5}
    .intro-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}
    .tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:8px;padding:7px 12px;background:var(--paper);font-size:13px;color:var(--green)}
    .tag.sand{background:var(--sand-soft);border-color:#ead4b5;color:#76552d}
    .step-band{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
    .step{position:relative;padding:25px 24px;border-right:1px solid var(--line)}
    .step:last-child{border-right:0}
    .step-number{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--green);color:#fff;font-weight:800;font-size:14px;margin-bottom:15px}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .topic-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:16px}
    .topic-list{display:grid;gap:14px}
    .topic-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:25px;display:grid;grid-template-columns:46px 1fr;gap:17px;transition:.2s}
    .topic-card:hover{border-color:var(--green);box-shadow:var(--shadow);transform:translateY(-2px)}
    .topic-card.feature{background:var(--green);color:#fff;min-height:190px}
    .topic-card.feature p{color:#d8ebe5}
    .topic-icon{width:44px;height:44px;border-radius:12px;background:var(--green-soft);color:var(--green);display:grid;place-items:center;font-size:21px;font-weight:800}
    .feature .topic-icon{background:rgba(255,255,255,.16);color:#fff}
    .topic-card p{color:var(--muted);font-size:14px;margin:0}
    .topic-card small{display:block;margin-top:14px;color:var(--sand);font-weight:700}
    .feature small{color:#f1d5ad}
    .notice-panel{background:var(--sand-soft);border:1px solid #eadbc3;border-radius:var(--radius);padding:28px}
    .notice-panel h2{font-size:23px}
    .notice-items{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
    .notice-item{background:#fff;border-radius:10px;padding:18px;border:1px solid #eee1ce}
    .notice-item b{display:block;color:var(--green);margin-bottom:6px}
    .notice-item p{font-size:14px;color:var(--muted);margin:0}
    .numbered{display:grid;gap:14px}
    .numbered-card{display:grid;grid-template-columns:58px 1fr;gap:20px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);transition:.2s}
    .numbered-card:hover{border-color:var(--green);box-shadow:var(--shadow)}
    .numbered-index{font-size:30px;color:var(--sand);font-weight:800;line-height:1}
    .numbered-card p{font-size:14px;color:var(--muted);margin:0}
    .article-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .article-row{display:grid;grid-template-columns:120px 1fr 28px;gap:22px;padding:22px 24px;border-bottom:1px solid var(--line);transition:.2s}
    .article-row:last-child{border-bottom:0}
    .article-row:hover{background:var(--green-soft);color:var(--green)}
    .article-row time{font-size:13px;color:var(--muted)}
    .article-row h3{margin:2px 0 5px;font-size:18px}
    .article-row p{font-size:14px;color:var(--muted);margin:0}
    .article-arrow{color:var(--green);font-size:22px;transition:.2s}
    .article-row:hover .article-arrow{transform:translateX(4px)}
    .more-link{display:inline-flex;color:var(--green);font-weight:700;font-size:14px;margin-top:20px}
    .channel-band{background:var(--green-soft);padding:28px;border-radius:var(--radius)}
    .channel-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
    .channel-links a{background:#fff;border:1px solid #cfe0d9;border-radius:10px;padding:12px 16px;color:var(--green);font-weight:700;transition:.2s}
    .channel-links a:hover{background:var(--green);color:#fff;border-color:var(--green)}
    .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .faq-grid details{background:#fff;border:1px solid var(--line);border-radius:11px;padding:18px 20px}
    .faq-grid summary{font-weight:700;cursor:pointer;color:var(--ink)}
    .faq-grid details[open]{border-color:var(--green)}
    .faq-grid p{font-size:14px;color:var(--muted);margin:12px 0 0}
    .cta{padding:58px 0;background:var(--green);color:#fff}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}
    .cta h2{margin-bottom:8px}
    .cta p{color:#d8ebe5;margin:0}
    .cta .btn-secondary{background:transparent;color:#fff;border-color:#a8d0c5}
    .cta .btn-secondary:hover{background:rgba(255,255,255,.1)}
    .footer{background:#173c37;color:#dce9e5;padding:56px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:50px}
    .footer .brand{color:#fff;margin-bottom:18px}
    .footer .brand-text small{color:#a8d0c5}
    .footer-note{font-size:14px;color:#a9c1bb;max-width:240px}
    .footer h3{font-size:15px;color:#fff;margin-bottom:15px}
    .footer-grid>div>a:not(.brand){display:block;color:#a9c1bb;font-size:14px;margin:7px 0;transition:.2s}
    .footer-grid>div>a:not(.brand):hover{color:#fff;transform:translateX(2px)}
    .copyright{display:flex;justify-content:space-between;border-top:1px solid rgba(220,233,229,.16);margin-top:40px;padding-top:18px;color:#91aaa3;font-size:12px}
    @media(max-width:1024px){
      .header-inner{gap:20px}.brand{min-width:220px}.nav{gap:15px}
      .topic-grid{grid-template-columns:1fr}.step{padding:22px 18px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .header-inner{height:68px}.header-action{display:none}.menu-btn{display:block;margin-left:auto}
      .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 16px;flex-direction:column;align-items:stretch;gap:0}
      .nav.open{display:flex}.nav a{padding:12px 0;border-bottom:1px solid var(--line)}
      .nav a:last-child{border-bottom:0}.brand{min-width:0}.brand-text{font-size:15px}
      .section{padding:56px 0}.page-intro{padding:42px 0 38px}
      .section-head{display:block;margin-bottom:22px}.section-head .muted{margin-top:8px}
      .step-band{grid-template-columns:1fr}.step{border-right:0;border-bottom:1px solid var(--line)}.step:last-child{border-bottom:0}
      .notice-items,.faq-grid{grid-template-columns:1fr}
      .cta-inner{display:block}.cta .actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}
    }
    @media(max-width:520px){
      h1{font-size:32px}.lead{font-size:16px}.topic-card{grid-template-columns:38px 1fr;padding:20px}
      .topic-icon{width:38px;height:38px;font-size:18px}.article-row{grid-template-columns:1fr 24px;gap:5px 15px;padding:19px 17px}
      .article-row time{grid-column:1/-1;order:2}.article-row .article-copy{grid-column:1;order:1}.article-row .article-arrow{grid-column:2;grid-row:1/3}
      .numbered-card{grid-template-columns:42px 1fr;gap:13px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}
      .copyright{display:block}.copyright span{display:block;margin-top:5px}
      .cta .btn{width:100%;margin-bottom:10px}
    }