/* roulang page: index */
:root{--green:#0d5a4b;--deep:#12372f;--ink:#17221e;--muted:#5d6964;--paper:#f7f5ef;--card:#fffdf8;--mint:#ddebe2;--line:#ccd7d0;--orange:#e8734f;--shadow:0 16px 40px rgba(23,34,30,.08);--radius:18px}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{height:76px;background:rgba(255,253,248,.94);border-bottom:1px solid rgba(204,215,208,.7);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
.header-inner{height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap}
.logo-mark{width:34px;height:34px;border:2px solid var(--green);border-radius:10px 10px 14px 14px;position:relative}
.logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--green);border-radius:4px}
.logo-mark:before{width:16px;height:3px;left:7px;top:9px;box-shadow:0 7px 0 var(--green),0 14px 0 var(--green)}
.logo-mark:after{width:4px;height:22px;left:14px;top:5px;background:var(--mint);z-index:-1}
.nav{display:flex;align-items:center;gap:5px;margin-left:auto}
.nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:10px;position:relative;transition:.25s}
.nav a:hover,.nav a.active{color:var(--green);background:var(--mint)}
.nav a.active:after{content:"";height:2px;width:20px;background:var(--green);position:absolute;bottom:3px;left:calc(50% - 10px)}
.header-action,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid var(--green);font-weight:700;transition:.25s}
.header-action,.btn-primary{background:var(--green);color:#fffdf8}
.header-action:hover,.btn-primary:hover{background:#084438;transform:translateY(-2px);box-shadow:0 8px 18px rgba(13,90,75,.18)}
.btn-secondary{color:var(--green);background:transparent}
.btn-secondary:hover{background:var(--mint);transform:translateY(-2px)}
.menu-toggle{display:none;background:none;border:0;color:var(--green);font-size:26px}
.hero{padding:88px 0 78px;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;width:530px;height:530px;border:1px solid rgba(13,90,75,.1);border-radius:50%;right:-160px;top:-220px;box-shadow:0 0 0 34px rgba(13,90,75,.035),0 0 0 72px rgba(13,90,75,.025)}
.hero-grid{display:grid;grid-template-columns:1.04fr .96fr;align-items:center;gap:70px}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:7px;color:var(--green);background:var(--mint);padding:5px 11px;border-radius:8px;font-size:13px;font-weight:700}
.eyebrow:before{content:"";width:7px;height:7px;background:var(--orange);border-radius:50%}
h1{font-size:clamp(36px,5vw,62px);line-height:1.16;letter-spacing:-2px;margin:20px 0}
.hero-copy{font-size:18px;color:var(--muted);max-width:600px}
.actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.hero-note{display:flex;gap:22px;margin-top:34px;color:var(--muted);font-size:13px}
.hero-note strong{display:block;color:var(--ink);font-size:20px;line-height:1.2}
.device-stage{min-height:410px;background:var(--mint);border-radius:30px;position:relative;display:flex;align-items:center;justify-content:center;border:1px solid #c8ddd1}
.device-stage:before{content:"";position:absolute;width:290px;height:290px;border:1px solid rgba(13,90,75,.2);border-radius:50%;box-shadow:0 0 0 28px rgba(255,253,248,.35)}
.phone{width:218px;height:370px;background:#183d34;border:7px solid #fdfbf3;border-radius:28px;box-shadow:var(--shadow);position:relative;z-index:1;padding:16px 13px;color:#fff}
.phone-top{font-size:11px;opacity:.7;display:flex;justify-content:space-between}
.phone h3{font-size:21px;margin:23px 0 13px}
.phone-card{background:#eaf3ec;color:var(--ink);border-radius:12px;padding:12px;margin:9px 0;font-size:11px}
.phone-card b{display:block;font-size:13px;margin-bottom:4px}
.phone-line{height:8px;border-radius:5px;background:#7fb5a1;margin:8px 0;width:78%}
.phone-line.short{width:48%;background:#e8734f}
.section{padding:86px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:34px}
.section-kicker{color:var(--green);font-size:13px;font-weight:800;letter-spacing:1px}
h2{font-size:34px;line-height:1.25;margin-top:7px;letter-spacing:-1px}
.section-intro{color:var(--muted);max-width:560px}
.verify-bar{background:var(--card);border-block:1px solid var(--line);padding:24px 0}
.verify-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.verify-item{display:flex;gap:12px;align-items:flex-start}
.icon{width:38px;height:38px;border-radius:11px;background:var(--mint);color:var(--green);display:grid;place-items:center;font-weight:800;flex:none}
.verify-item b{display:block;font-size:15px}.verify-item span{font-size:12px;color:var(--muted)}
.entry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.entry-card{background:var(--card);border:1px solid var(--line);padding:24px;border-radius:var(--radius);min-height:154px;transition:.25s}
.entry-card:nth-child(2){background:#edf4ee}.entry-card:nth-child(4){grid-column:span 2;background:#f2eee4}
.entry-card:hover,.info-card:hover,.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#a9c7b7}
.entry-card h3{font-size:20px;margin:17px 0 5px}.entry-card p{font-size:14px;color:var(--muted)}
.download-panel{background:var(--deep);color:#fffdf8;border-radius:26px;padding:42px;display:grid;grid-template-columns:1.2fr .8fr;gap:35px;align-items:center}
.download-panel p{color:#c5d8cd;margin:14px 0 22px}.download-panel .badge{background:#d7eadb;color:var(--green)}
.specs{display:flex;flex-wrap:wrap;gap:9px;margin:18px 0}.spec{border:1px solid rgba(221,235,226,.35);border-radius:8px;padding:6px 10px;color:#d9e9df;font-size:13px}
.qr-box{background:#fffdf8;color:var(--ink);border-radius:18px;padding:20px;text-align:center;width:190px;margin:auto}.qr{width:120px;height:120px;margin:0 auto 12px;background:repeating-linear-gradient(45deg,#17221e 0 4px,#fffdf8 4px 8px);border:8px solid #fff;outline:1px solid var(--line)}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.info-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:25px;transition:.25s}
.info-card h3{margin:14px 0 7px;font-size:19px}.info-card p{color:var(--muted);font-size:14px}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:28px}
.step{position:relative;padding:0 24px 0 0}.step:not(:last-child):after{content:"";height:1px;background:var(--line);position:absolute;top:18px;right:15px;width:calc(100% - 55px)}
.step-num{width:36px;height:36px;border-radius:50%;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:800;position:relative;z-index:1}
.step h3{font-size:16px;margin:15px 0 5px}.step p{color:var(--muted);font-size:13px}
.dark-section{background:var(--deep);color:#fffdf8}.dark-section .section-kicker{color:#9bc7b2}.dark-section .section-intro,.dark-section p{color:#bfd2c7}
.update-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.version{font-size:42px;font-weight:800;margin:8px 0}.update-points{list-style:none;margin-top:22px}.update-points li{padding:10px 0;border-bottom:1px solid rgba(221,235,226,.18);color:#d4e4db}
.security{display:grid;grid-template-columns:.8fr 1.2fr;gap:55px;align-items:center}.shield{width:210px;height:230px;margin:auto;background:var(--mint);clip-path:polygon(50% 0,92% 15%,86% 65%,50% 100%,14% 65%,8% 15%);display:grid;place-items:center;color:var(--green);font-size:58px}
.security-list{display:grid;grid-template-columns:1fr 1fr;gap:18px}.security-list div{border-left:3px solid var(--green);padding-left:15px}.security-list b{display:block}.security-list span{font-size:13px;color:var(--muted)}
.metric-strip{display:grid;grid-template-columns:repeat(4,1fr);border-block:1px solid var(--line);padding:25px 0}.metric{padding:0 20px;border-right:1px solid var(--line)}.metric:first-child{padding-left:0}.metric:last-child{border:0}.metric strong{display:block;font-size:24px;color:var(--green)}.metric span{color:var(--muted);font-size:13px}
.faq{max-width:850px;margin:auto}.faq details{border-bottom:1px solid var(--line);padding:19px 0}.faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between}.faq summary:after{content:"+";color:var(--green);font-size:22px}.faq details[open] summary:after{content:"−"}.faq details p{padding:13px 30px 0 0;color:var(--muted);font-size:14px}
.form-panel{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:34px;display:grid;grid-template-columns:.75fr 1.25fr;gap:40px}.form-panel h2{font-size:27px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--line);background:#fff;padding:12px;border-radius:9px;outline:none}.field textarea{min-height:92px;resize:vertical}.field.full{grid-column:1/-1}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(13,90,75,.1)}
.final-cta{background:var(--mint);border-radius:24px;padding:38px 42px;display:flex;justify-content:space-between;align-items:center;gap:25px}.final-cta p{color:var(--muted);margin-top:6px}
.content-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}.content-card.featured{display:grid;grid-template-columns:1fr auto;gap:25px;background:#edf4ee}.article-meta{color:var(--muted);font-size:12px;margin-bottom:10px}.content-card h3{font-size:20px;line-height:1.4;margin:5px 0 8px}.content-card p{color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.read-link{color:var(--green);font-weight:700;white-space:nowrap;align-self:end}
.empty{padding:32px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:15px;background:rgba(255,253,248,.5)}
.site-footer{background:var(--deep);color:#edf5ef;padding:60px 0 24px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:35px}.footer-brand p{color:#b5cabe;font-size:13px;max-width:250px;margin-top:14px}.site-footer h3{font-size:15px;margin-bottom:15px}.site-footer ul{list-style:none}.site-footer li{margin:8px 0}.site-footer li a{color:#b5cabe;font-size:13px}.site-footer li a:hover{color:#fff}.footer-download{border:1px solid rgba(221,235,226,.25);border-radius:13px;padding:17px;color:#b5cabe;font-size:13px}.footer-bottom{border-top:1px solid rgba(221,235,226,.18);margin-top:40px;padding-top:19px;color:#9fb8aa;font-size:12px;display:flex;justify-content:space-between;gap:15px}
@media(max-width:1024px){.nav{gap:0}.nav a{padding:8px 8px;font-size:13px}.hero-grid{gap:35px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
@media(max-width:768px){.container{width:min(100% - 30px,600px)}.site-header,.header-inner{height:68px}.menu-toggle{display:block;margin-left:auto}.nav{display:none;position:absolute;top:68px;left:15px;right:15px;background:var(--card);border:1px solid var(--line);padding:12px;border-radius:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{padding:12px}.header-action{display:none}.hero{padding:60px 0}.hero-grid,.download-panel,.update-grid,.security,.form-panel{grid-template-columns:1fr}.device-stage{min-height:350px}.verify-grid{grid-template-columns:1fr 1fr}.entry-grid{grid-template-columns:1fr 1fr}.entry-card:nth-child(4){grid-column:span 1}.section{padding:64px 0}.section-head{display:block}.section-intro{margin-top:12px}.timeline{grid-template-columns:1fr 1fr;gap:25px}.step:not(:last-child):after{display:none}.metric-strip{grid-template-columns:1fr 1fr;gap:20px}.metric{border:0;padding:0}.security-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.final-cta{display:block}.final-cta .actions{margin-top:20px}}
@media(max-width:520px){h1{font-size:36px;letter-spacing:-1px}.hero-copy{font-size:16px}.hero-note{gap:14px}.verify-grid,.entry-grid,.feature-list,.timeline,.form-grid,.footer-grid{grid-template-columns:1fr}.entry-card:nth-child(4){grid-column:auto}.download-panel{padding:26px 20px}.qr-box{margin-top:10px}.content-card.featured{display:block}.content-card.featured .read-link{display:inline-block;margin-top:18px}.metric-strip{grid-template-columns:1fr 1fr}.metric strong{font-size:20px}.form-panel{padding:24px 18px}}

/* roulang page: article */
:root{--green:#0d5a4b;--deep:#12372f;--ink:#17221e;--muted:#5d6964;--paper:#f7f5ef;--card:#fffdf8;--mint:#ddebe2;--line:#ccd7d0;--orange:#e8734f;--shadow:0 16px 40px rgba(23,34,30,.08);--radius:18px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.72}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:3px solid rgba(13,90,75,.28);outline-offset:3px}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{height:76px;background:rgba(255,253,248,.94);border-bottom:1px solid rgba(204,215,208,.7);position:sticky;top:0;z-index:30;backdrop-filter:blur(12px)}
.header-inner{height:76px;display:flex;align-items:center;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap}
.logo-mark{width:34px;height:34px;border:2px solid var(--green);border-radius:10px 10px 14px 14px;position:relative;flex:none}
.logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--green);border-radius:4px}
.logo-mark:before{width:16px;height:3px;left:7px;top:9px;box-shadow:0 7px 0 var(--green),0 14px 0 var(--green)}
.logo-mark:after{width:4px;height:22px;left:14px;top:5px;background:var(--mint);z-index:-1}
.nav{display:flex;align-items:center;gap:5px;margin-left:auto}
.nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:10px;position:relative;transition:.25s}
.nav a:hover,.nav a.active{color:var(--green);background:var(--mint)}
.nav a.active:after{content:"";height:2px;width:20px;background:var(--green);position:absolute;bottom:3px;left:calc(50% - 10px)}
.header-action,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid var(--green);font-weight:700;transition:.25s}
.header-action,.btn-primary{background:var(--green);color:#fffdf8}
.header-action:hover,.btn-primary:hover{background:#084438;color:#fffdf8;transform:translateY(-2px);box-shadow:0 8px 18px rgba(13,90,75,.18)}
.btn-secondary{color:var(--green);background:transparent}
.btn-secondary:hover{background:var(--mint);color:var(--green);transform:translateY(-2px)}
.menu-toggle{display:none;background:none;border:0;color:var(--green);font-size:26px}
.page-hero{padding:58px 0 36px;position:relative;overflow:hidden}
.page-hero:before{content:"";position:absolute;width:440px;height:440px;border:1px solid rgba(13,90,75,.1);border-radius:50%;right:-115px;top:-245px;box-shadow:0 0 0 36px rgba(13,90,75,.035),0 0 0 78px rgba(13,90,75,.02)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;color:#738078;font-size:13px;margin-bottom:27px;position:relative}
.breadcrumb a{color:var(--muted);transition:.2s}
.breadcrumb a:hover{color:var(--green)}
.breadcrumb i{font-style:normal;color:#a0afa7}
.article-top{position:relative;max-width:950px}
.badge,.eyebrow{display:inline-flex;align-items:center;gap:7px;color:var(--green);background:var(--mint);padding:5px 11px;border-radius:8px;font-size:13px;font-weight:700}
.badge:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--orange)}
.article-top h1{font-size:clamp(30px,4.2vw,52px);line-height:1.22;letter-spacing:-1.2px;margin:18px 0;color:var(--ink);font-weight:800}
.article-top>p{font-size:17px;color:var(--muted);max-width:820px;margin:0}
.meta-strip{margin-top:27px;padding-top:19px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:11px 24px;color:var(--muted);font-size:13px}
.meta-strip span{display:inline-flex;align-items:center;gap:7px}
.meta-dot{width:5px;height:5px;border-radius:50%;background:#9cb9aa}
.section{padding:40px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:24px}
.section-kicker{color:var(--green);font-size:13px;font-weight:800;letter-spacing:1px}
.section-head h2{font-size:26px;margin:4px 0 0;font-weight:800}
.content-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 9px 26px rgba(23,34,30,.035)}
.article-layout{display:grid;grid-template-columns:minmax(0,800px) 250px;justify-content:space-between;gap:48px;align-items:start}
.article-body{padding:40px 46px}
.article-body>*:first-child{margin-top:0}
.article-body h2{font-size:27px;line-height:1.4;margin:42px 0 17px;color:var(--ink);font-weight:800}
.article-body h3{font-size:21px;margin:31px 0 13px;color:var(--green);font-weight:800}
.article-body p{font-size:16px;color:#43524c;margin:0 0 19px}
.article-body ul,.article-body ol{padding-left:24px;color:#43524c;margin:0 0 20px}
.article-body li{padding-left:5px;margin:8px 0}
.article-body blockquote{margin:28px 0;padding:17px 21px;background:#edf4ee;border-left:4px solid var(--green);border-radius:0 12px 12px 0;color:#38564b}
.article-body img{border-radius:15px;margin:27px auto;box-shadow:var(--shadow)}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;overflow:hidden;border:1px solid var(--line);border-radius:12px}
.article-body th,.article-body td{padding:12px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:var(--mint);color:var(--green)}
.article-aside{position:sticky;top:100px;padding:24px}
.article-aside h3{font-size:16px;margin:0 0 14px}
.article-aside ul{list-style:none;padding:0;margin:0}
.article-aside li{padding:10px 0;border-bottom:1px solid #e1e8e3;font-size:13px;color:var(--muted)}
.article-aside li:last-child{border:0}
.article-aside b{display:block;color:var(--ink);font-size:14px;margin-bottom:2px}
.tip-card{padding:29px 32px;display:grid;grid-template-columns:1fr auto;gap:25px;align-items:center;background:#edf4ee;border:1px solid #c8ddd1;border-radius:20px}
.tip-card h2{font-size:22px;margin:0 0 7px;font-weight:800}
.tip-card p{color:var(--muted);margin:0;font-size:14px}
.tip-note{font-size:12px;color:#547267;margin-top:10px!important}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.article-card{background:var(--card);border:1px solid var(--line);padding:23px;border-radius:var(--radius);transition:.25s;min-height:205px;display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#a9c7b7}
.article-card h3{font-size:18px;line-height:1.45;margin:14px 0 8px;font-weight:800}
.article-card p{font-size:13px;color:var(--muted);margin:0 0 17px}
.article-card footer{display:flex;justify-content:space-between;align-items:center;margin-top:auto;font-size:12px;color:#78857e}
.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--green);font-size:14px;font-weight:700;position:relative}
.text-link:after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:2px;background:var(--green);transition:.2s}
.text-link:hover:after{width:24px}
.feedback-bar{display:flex;justify-content:space-between;align-items:center;gap:22px;padding:27px 31px}
.feedback-bar h2{font-size:21px;margin:0 0 5px}
.feedback-bar p{margin:0;color:var(--muted);font-size:14px}
.end-note{background:var(--deep);color:#fffdf8;border-radius:20px;padding:25px 31px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.end-note b{font-size:17px}
.end-note p{margin:3px 0 0;color:#bfd2c7;font-size:13px}
.site-footer{margin-top:76px;background:var(--deep);color:#e9f0eb;padding:58px 0 18px}
.footer-grid{display:grid;grid-template-columns:1.45fr .85fr .85fr 1.15fr;gap:34px}
.site-footer .logo{color:#fffdf8}
.site-footer .logo-mark{border-color:#a9cfbb}
.site-footer .logo-mark:before{background:#a9cfbb;box-shadow:0 7px 0 #a9cfbb,0 14px 0 #a9cfbb}
.footer-brand p{color:#bfd2c7;font-size:14px;max-width:295px;margin:18px 0 0}
.site-footer h3{font-size:14px;color:#fffdf8;margin:4px 0 16px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:9px 0}
.site-footer li a{font-size:13px;color:#bfd2c7;transition:.2s}
.site-footer li a:hover{color:#fffdf8}
.footer-download{border:1px solid rgba(184,214,197,.25);border-radius:15px;padding:17px;background:rgba(255,255,255,.045)}
.footer-download b{font-size:14px}
.footer-download p{font-size:13px;color:#bfd2c7;margin:8px 0}
.footer-download span{font-size:12px;color:#9bc7b2}
.footer-bottom{border-top:1px solid rgba(184,214,197,.18);margin-top:43px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#9eb9ac}
@media(max-width:1024px){.nav{gap:1px}.nav a{padding:8px 9px}.header-inner{gap:15px}.header-action{padding:0 14px}.article-layout{grid-template-columns:minmax(0,1fr) 220px;gap:24px}.article-body{padding:34px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.site-header,.header-inner{height:68px}.nav{display:none}.menu-toggle{display:block;margin-left:auto}.header-action{display:none}.page-hero{padding:40px 0 26px}.article-top h1{font-size:33px}.article-layout{display:block}.article-aside{position:static;margin-top:20px}.article-body{padding:27px 23px}.article-body h2{font-size:24px}.tip-card,.feedback-bar,.end-note{display:block}.tip-card .btn,.feedback-bar .btn{margin-top:18px}.related-grid{grid-template-columns:1fr}.footer-grid{gap:29px}.footer-bottom{display:block}.footer-bottom span{display:block;margin:7px 0}}
@media(max-width:520px){.container{width:min(100% - 28px,1180px)}.logo{font-size:15px}.logo-mark{width:30px;height:30px}.page-hero{padding-top:32px}.article-top h1{font-size:29px;letter-spacing:-.6px}.article-top>p{font-size:15px}.meta-strip{gap:9px 14px}.section{padding:28px 0}.section-head h2{font-size:23px}.article-body{padding:24px 19px}.article-body p{font-size:15px}.article-body h2{font-size:22px}.article-body h3{font-size:19px}.tip-card,.feedback-bar,.end-note{padding:23px 20px}.footer-grid{grid-template-columns:1fr}.site-footer{margin-top:54px;padding-top:44px}}

/* roulang page: category1 */
:root{--green:#0d5a4b;--deep:#12372f;--ink:#17221e;--muted:#5d6964;--paper:#f7f5ef;--card:#fffdf8;--mint:#ddebe2;--line:#ccd7d0;--orange:#e8734f;--orange-soft:#fbe5dd;--shadow:0 16px 40px rgba(23,34,30,.08);--radius:18px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .site-header{height:76px;background:rgba(255,253,248,.94);border-bottom:1px solid rgba(204,215,208,.7);position:sticky;top:0;z-index:50;backdrop-filter:blur(12px)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap;letter-spacing:.1px}
    .logo:hover{color:var(--green)}
    .logo-mark{width:34px;height:34px;border:2px solid var(--green);border-radius:10px 10px 14px 14px;position:relative;flex:none}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--green);border-radius:4px}
    .logo-mark:before{width:16px;height:3px;left:7px;top:9px;box-shadow:0 7px 0 var(--green),0 14px 0 var(--green)}
    .logo-mark:after{width:4px;height:22px;left:14px;top:5px;background:var(--mint);z-index:-1}
    .nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:10px;position:relative;transition:.25s;white-space:nowrap}
    .nav a:hover,.nav a.active{color:var(--green);background:var(--mint)}
    .nav a.active:after{content:"";height:2px;width:20px;background:var(--green);position:absolute;bottom:3px;left:calc(50% - 10px)}
    .header-action,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid var(--green);font-weight:700;transition:.25s}
    .header-action,.btn-primary{background:var(--green);color:#fffdf8}
    .header-action:hover,.btn-primary:hover{background:#084438;color:#fffdf8;transform:translateY(-2px);box-shadow:0 8px 18px rgba(13,90,75,.18)}
    .btn-secondary{background:transparent;color:var(--green)}
    .btn-secondary:hover{background:var(--mint);color:var(--green);transform:translateY(-2px)}
    .menu-toggle{display:none;border:0;background:transparent;color:var(--green);font-size:26px;padding:6px}
    a:focus-visible,button:focus-visible{outline:3px solid rgba(232,115,79,.55);outline-offset:3px}
    .page-banner{padding:60px 0 46px;position:relative;overflow:hidden;border-bottom:1px solid rgba(204,215,208,.8)}
    .page-banner:before{content:"";position:absolute;width:500px;height:500px;border:1px solid rgba(13,90,75,.11);border-radius:50%;right:-110px;top:-310px;box-shadow:0 0 0 35px rgba(13,90,75,.035),0 0 0 74px rgba(13,90,75,.02)}
    .breadcrumb{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:20px;position:relative}
    .breadcrumb a:hover{color:var(--green);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
    .breadcrumb i{width:5px;height:5px;border-radius:50%;background:var(--line)}
    .banner-grid{display:grid;grid-template-columns:1fr auto;gap:36px;align-items:end;position:relative}
    .eyebrow,.badge{display:inline-flex;align-items:center;gap:7px;color:var(--green);background:var(--mint);padding:5px 11px;border-radius:8px;font-size:13px;font-weight:700}
    .eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--orange)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(34px,5vw,54px);line-height:1.18;letter-spacing:-1.5px;margin:14px 0}
    h2{font-size:clamp(25px,3vw,34px);line-height:1.3;letter-spacing:-.6px}
    h3{line-height:1.4}
    .banner-copy{max-width:730px;font-size:17px;color:var(--muted);margin-bottom:0}
    .update-stamp{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px 21px;min-width:208px;box-shadow:0 8px 25px rgba(23,34,30,.04)}
    .update-stamp span{display:block;color:var(--muted);font-size:12px}
    .update-stamp b{display:block;font-size:17px;color:var(--green);margin-top:2px}
    .section{padding:78px 0}
    .section-soft{background:#f0f3ec}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:32px}
    .section-kicker{font-size:13px;font-weight:800;color:var(--green);letter-spacing:1px;margin-bottom:7px}
    .section-intro{max-width:535px;color:var(--muted);margin-bottom:0}
    .pin-notice{background:var(--deep);color:#fffdf8;border-radius:24px;padding:34px 36px;display:grid;grid-template-columns:auto 1fr auto;gap:24px;align-items:center;position:relative;overflow:hidden}
    .pin-notice:after{content:"";position:absolute;width:190px;height:190px;border-radius:50%;border:1px solid rgba(221,235,226,.2);right:-55px;bottom:-105px;box-shadow:0 0 0 28px rgba(221,235,226,.05)}
    .pin-icon{width:53px;height:53px;border:1px solid rgba(221,235,226,.35);display:grid;place-items:center;border-radius:16px;color:#bde0ce;font-size:24px;font-weight:800}
    .pin-notice .badge{background:rgba(221,235,226,.16);color:#c7e6d5;margin-bottom:9px}
    .pin-notice h2{font-size:24px;margin-bottom:6px}
    .pin-notice p{color:#c6d8ce;margin-bottom:0;max-width:680px;font-size:14px}
    .notice-link{position:relative;color:#fffdf8;font-weight:700;white-space:nowrap;padding-bottom:4px}
    .notice-link:after,.text-link:after{content:"";height:2px;width:22px;background:currentColor;position:absolute;left:0;bottom:0;transition:.25s}
    .notice-link:hover:after,.text-link:hover:after{width:100%}
    .notice-list{display:grid;gap:13px}
    .notice-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:23px 25px;display:grid;grid-template-columns:150px 1fr auto;align-items:center;gap:24px;transition:.25s}
    .notice-card:hover{transform:translateY(-4px);border-color:#a9c7b7;box-shadow:var(--shadow)}
    .notice-meta{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
    .notice-meta time{font-size:13px;color:var(--muted)}
    .tag-update{background:var(--orange-soft);color:#a9482d}
    .tag-security{background:#e6edf5;color:#405f75}
    .notice-content h3{font-size:19px;margin-bottom:5px}
    .notice-content p{font-size:14px;color:var(--muted);margin-bottom:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .text-link{position:relative;display:inline-block;color:var(--green);font-size:14px;font-weight:800;padding-bottom:4px;white-space:nowrap}
    .list-more{margin-top:25px;display:flex;justify-content:flex-end}
    .channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .channel-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:27px;min-height:220px;transition:.25s;position:relative;overflow:hidden}
    .channel-card:hover{transform:translateY(-4px);border-color:#a9c7b7;box-shadow:var(--shadow)}
    .channel-card:before{content:"";display:block;width:42px;height:42px;border-radius:13px;background:var(--mint);margin-bottom:21px}
    .channel-card:nth-child(2):before{background:var(--orange-soft)}
    .channel-card:nth-child(3):before{background:#e6edf5}
    .channel-card h3{font-size:21px;margin-bottom:8px}
    .channel-card p{color:var(--muted);font-size:14px;margin-bottom:20px}
    .recognition-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
    .verify-visual{background:var(--mint);min-height:335px;border-radius:24px;border:1px solid #c8ddd1;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
    .verify-visual:before{content:"";position:absolute;width:230px;height:230px;border:1px solid rgba(13,90,75,.18);border-radius:50%;box-shadow:0 0 0 27px rgba(255,253,248,.4)}
    .shield{width:130px;height:150px;background:var(--deep);clip-path:polygon(50% 0,91% 17%,84% 70%,50% 100%,16% 70%,9% 17%);position:relative;z-index:1}
    .shield:after{content:"✓";position:absolute;left:39px;top:37px;color:#cde9d9;font-size:58px;font-weight:700}
    .verify-points{display:grid;gap:15px}
    .verify-point{display:flex;gap:15px;padding:15px 0;border-bottom:1px solid var(--line)}
    .verify-point:last-child{border-bottom:0}
    .point-num{width:31px;height:31px;flex:none;border-radius:9px;background:var(--mint);color:var(--green);display:grid;place-items:center;font-weight:800;font-size:13px}
    .verify-point b{display:block;font-size:17px;margin-bottom:2px}
    .verify-point p{font-size:14px;color:var(--muted);margin:0}
    .timeline{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:19px}
    .timeline:before{content:"";position:absolute;left:8%;right:8%;top:22px;height:1px;background:var(--line)}
    .timeline-item{position:relative;padding-top:52px}
    .timeline-dot{position:absolute;top:13px;left:0;width:19px;height:19px;border-radius:50%;background:var(--card);border:5px solid var(--green);z-index:1}
    .timeline-item:nth-child(2) .timeline-dot{border-color:var(--orange)}
    .timeline-item b{font-size:18px;display:block;margin-bottom:7px}
    .timeline-item p{font-size:14px;color:var(--muted);margin-bottom:0}
    .support-panel{background:var(--deep);border-radius:25px;padding:40px 44px;color:#fffdf8;display:flex;align-items:center;justify-content:space-between;gap:30px;position:relative;overflow:hidden}
    .support-panel:after{content:"";position:absolute;width:280px;height:280px;border-radius:50%;right:-80px;top:-150px;border:1px solid rgba(221,235,226,.18);box-shadow:0 0 0 28px rgba(221,235,226,.05)}
    .support-panel h2{font-size:30px;margin-bottom:7px;position:relative}
    .support-panel p{color:#c0d3c8;margin:0;position:relative}
    .support-actions{display:flex;gap:12px;flex-wrap:wrap;position:relative}
    .support-panel .btn-primary{background:#fffdf8;color:var(--green);border-color:#fffdf8}
    .support-panel .btn-primary:hover{background:#e5f0e9}
    .support-panel .btn-secondary{border-color:#8bb49f;color:#e4f1e9}
    .support-panel .btn-secondary:hover{background:rgba(221,235,226,.12);color:#fff}
    .site-footer{background:var(--deep);color:#fffdf8;padding:64px 0 18px;margin-top:78px}
    .footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1fr;gap:38px}
    .footer-brand .logo{color:#fffdf8;margin-bottom:17px}
    .footer-brand .logo-mark{border-color:#aad1bd}
    .footer-brand .logo-mark:before{background:#aad1bd;box-shadow:0 7px 0 #aad1bd,0 14px 0 #aad1bd}
    .footer-brand p,.site-footer li,.footer-download p{color:#bfd2c7;font-size:14px}
    .site-footer h3{font-size:15px;margin:5px 0 14px;color:#fffdf8}
    .site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:9px}
    .site-footer a{transition:.2s}
    .site-footer a:hover{color:#fff;text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px}
    .footer-download{border:1px solid rgba(191,210,199,.25);border-radius:16px;padding:19px;background:rgba(255,253,248,.05)}
    .footer-download b{font-size:15px}
    .footer-download p{margin:8px 0}
    .footer-download span{font-size:12px;color:#9bc7b2}
    .footer-bottom{border-top:1px solid rgba(191,210,199,.18);padding-top:18px;margin-top:45px;display:flex;justify-content:space-between;gap:20px;color:#9fbbae;font-size:12px}
    @media(max-width:1024px){
      .header-inner{gap:14px}.nav a{padding:9px 9px}.header-action{padding:0 14px}
      .notice-card{grid-template-columns:125px 1fr}.notice-card .text-link{grid-column:2}
      .footer-grid{grid-template-columns:1.3fr 1fr 1fr}
      .footer-download{grid-column:span 3}
    }
    @media(max-width:768px){
      .container{width:min(100% - 30px,1180px)}.site-header,.header-inner{height:68px}
      .header-inner{justify-content:space-between}.logo{font-size:15px}.nav,.header-action{display:none}.menu-toggle{display:block}
      .site-header.open{height:auto}.site-header.open .header-inner{height:auto;min-height:68px;flex-wrap:wrap;padding:12px 0}.site-header.open .nav{display:flex;order:3;width:100%;margin:3px 0 0;flex-direction:column;align-items:stretch}.site-header.open .nav a{padding:11px 13px}.site-header.open .header-action{display:inline-flex;order:2;margin-left:auto}
      .page-banner{padding:43px 0 38px}.banner-grid{grid-template-columns:1fr}.update-stamp{width:100%;max-width:300px}
      .section{padding:60px 0}.section-head{align-items:flex-start;flex-direction:column;margin-bottom:25px}
      .pin-notice{grid-template-columns:auto 1fr;padding:26px}.pin-notice .notice-link{grid-column:2}
      .notice-card{grid-template-columns:1fr;gap:12px;padding:21px}.notice-meta{flex-direction:row;align-items:center}.notice-card .text-link{grid-column:auto}
      .channel-grid,.recognition-grid{grid-template-columns:1fr}.timeline{grid-template-columns:1fr;gap:5px}.timeline:before{left:9px;top:20px;bottom:15px;right:auto;width:1px;height:auto}.timeline-item{padding:0 0 23px 40px}.timeline-dot{top:3px;left:0}
      .support-panel{padding:31px;display:block}.support-actions{margin-top:22px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand,.footer-download{grid-column:span 2}.footer-bottom{flex-direction:column}
    }
    @media(max-width:520px){
      h1{font-size:35px}.banner-copy{font-size:15px}.pin-notice{grid-template-columns:1fr;gap:16px}.pin-notice .notice-link{grid-column:auto}
      .pin-icon{width:46px;height:46px}.pin-notice h2{font-size:21px}.channel-grid{gap:14px}.channel-card{min-height:0;padding:23px}
      .support-panel{padding:27px 23px}.support-panel h2{font-size:26px}.support-actions .btn{width:100%}.footer-grid{grid-template-columns:1fr}.footer-brand,.footer-download{grid-column:auto}.footer-bottom{margin-top:33px}
    }

/* roulang page: category2 */
:root{--green:#0d5a4b;--deep:#12372f;--ink:#17221e;--muted:#5d6964;--paper:#f7f5ef;--card:#fffdf8;--mint:#ddebe2;--line:#ccd7d0;--orange:#e8734f;--shadow:0 16px 40px rgba(23,34,30,.08);--radius:18px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .site-header{height:76px;background:rgba(255,253,248,.95);border-bottom:1px solid rgba(204,215,208,.7);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border:2px solid var(--green);border-radius:10px 10px 14px 14px;position:relative}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--green);border-radius:4px}
    .logo-mark:before{width:16px;height:3px;left:7px;top:9px;box-shadow:0 7px 0 var(--green),0 14px 0 var(--green)}
    .logo-mark:after{width:4px;height:22px;left:14px;top:5px;background:var(--mint);z-index:-1}
    .nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:10px;position:relative;transition:.25s}
    .nav a:hover,.nav a.active{color:var(--green);background:var(--mint)}
    .nav a.active:after{content:"";height:2px;width:20px;background:var(--green);position:absolute;bottom:3px;left:calc(50% - 10px)}
    .header-action,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid var(--green);font-weight:700;transition:.25s}
    .header-action,.btn-primary{background:var(--green);color:#fffdf8}
    .header-action:hover,.btn-primary:hover{background:#084438;transform:translateY(-2px);box-shadow:0 8px 18px rgba(13,90,75,.18)}
    .btn-secondary{color:var(--green);background:transparent}
    .btn-secondary:hover{background:var(--mint);transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;color:var(--green);font-size:26px}
    .page-banner{padding:62px 0 45px;background:linear-gradient(110deg,#edf4ee 0%,var(--paper) 68%);border-bottom:1px solid var(--line)}
    .breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:23px}
    .breadcrumb span{color:#a0aaa4}
    .eyebrow,.badge{display:inline-flex;align-items:center;gap:7px;color:var(--green);background:var(--mint);padding:5px 11px;border-radius:8px;font-size:13px;font-weight:700}
    .eyebrow:before{content:"";width:7px;height:7px;background:var(--orange);border-radius:50%}
    h1,h2,h3{line-height:1.3;margin-top:0}
    h1{font-size:clamp(34px,5vw,58px);letter-spacing:-1px;margin:13px 0 14px}
    h2{font-size:clamp(25px,3vw,36px);margin-bottom:12px}
    h3{font-size:19px;margin-bottom:8px}
    .banner-row{display:flex;justify-content:space-between;align-items:end;gap:30px}
    .banner-copy{max-width:720px;color:var(--muted);font-size:17px}
    .status-box{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:17px 20px;min-width:220px}
    .status-box small{display:block;color:var(--muted);font-size:12px}.status-box strong{font-size:20px;color:var(--green)}
    .section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
    .section-kicker{color:var(--green);font-size:13px;font-weight:800;letter-spacing:1px}
    .section-intro{color:var(--muted);max-width:600px}
    .download-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .download-main,.qr-card,.info-card,.step-card,.faq details,.support-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
    .download-main{padding:34px}
    .download-main p{color:var(--muted)}
    .version-line{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}
    .version-line span{border:1px solid var(--line);padding:7px 12px;border-radius:9px;color:var(--muted);font-size:13px;background:#fff}
    .platforms{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin:25px 0}
    .platform{padding:18px;border:1px solid var(--line);border-radius:13px;background:#fbfaf5}
    .platform b{display:block;color:var(--green);margin-bottom:4px}.platform small{color:var(--muted)}
    .qr-card{padding:26px;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background:#edf4ee}
    .qr{width:146px;height:146px;border:10px solid #fff;background:repeating-linear-gradient(45deg,#163e35 0 4px,#fff 4px 8px),repeating-linear-gradient(-45deg,transparent 0 5px,rgba(13,90,75,.75) 5px 8px);margin:8px 0 18px;border-radius:7px}
    .qr-card p{color:var(--muted);font-size:13px;margin:0}
    .verify-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .verify-item{padding:24px;border-left:3px solid var(--green);background:var(--card);border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line);border-radius:14px}
    .number{color:var(--orange);font-weight:800;font-size:14px;letter-spacing:1px}
    .verify-item p,.step-card p,.info-card p{color:var(--muted);font-size:14px;margin:0}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}
    .step-card{padding:24px;min-height:190px;transition:.25s}
    .step-card:hover,.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#a9c7b7}
    .step-icon{width:39px;height:39px;border-radius:11px;background:var(--mint);color:var(--green);display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:28px}
    .spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .info-card{padding:28px;transition:.25s}
    .spec-list{list-style:none;padding:0;margin:18px 0 0}
    .spec-list li{display:flex;justify-content:space-between;gap:20px;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}
    .spec-list li span{color:var(--muted)}.spec-list li strong{color:var(--green);text-align:right}
    .faq{max-width:860px;margin:auto}
    .faq details{padding:18px 22px;margin-bottom:11px}
    .faq summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:20px}
    .faq summary:after{content:"+";color:var(--green);font-size:22px;line-height:1}
    .faq details[open] summary:after{content:"−"}
    .faq details p{padding:13px 30px 0 0;color:var(--muted);font-size:14px;margin:0}
    .support-panel{padding:34px;display:flex;justify-content:space-between;align-items:center;gap:30px;background:var(--mint)}
    .support-panel p{color:var(--muted);margin:5px 0 0}
    .actions{display:flex;gap:12px;flex-wrap:wrap}
    .site-footer{background:var(--deep);color:#fffdf8;padding:62px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.4fr .8fr .9fr 1fr;gap:38px}
    .footer-brand p{color:#bfd2c7;max-width:290px;font-size:14px;margin-top:16px}
    .site-footer .logo{color:#fffdf8}
    .site-footer h3{font-size:15px;margin-bottom:16px}
    .site-footer ul{padding:0;margin:0;list-style:none}
    .site-footer li{margin:9px 0;color:#bfd2c7;font-size:14px}
    .site-footer li a:hover{color:#fff}
    .footer-download{border:1px solid rgba(221,235,226,.25);border-radius:14px;padding:20px;background:rgba(255,255,255,.04)}
    .footer-download b{font-size:15px}.footer-download p{color:#bfd2c7;font-size:13px}.footer-download span{font-size:12px;color:#9bc7b2}
    .footer-bottom{border-top:1px solid rgba(221,235,226,.18);margin-top:42px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#9fb9ad;font-size:12px}
    :focus-visible{outline:3px solid rgba(232,115,79,.55);outline-offset:3px}
    @media(max-width:1024px){.header-action{display:none}.nav{gap:0}.nav a{padding:8px 9px}.steps{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
    @media(max-width:768px){.site-header,.header-inner{height:68px}.header-inner{gap:14px}.logo{font-size:15px}.logo-mark{width:31px;height:31px}.menu-toggle{display:block;margin-left:auto}.nav{display:none;position:absolute;left:20px;right:20px;top:74px;padding:12px;background:var(--card);border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.nav.open{display:flex}.nav a{padding:12px 14px}.banner-row,.support-panel{display:block}.status-box{margin-top:24px}.download-layout,.spec-grid{grid-template-columns:1fr}.verify-strip{grid-template-columns:1fr}.section{padding:58px 0}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:span 2}}
    @media(max-width:520px){.container{width:min(100% - 28px,1180px)}h1{font-size:36px}.page-banner{padding:45px 0 34px}.platforms,.steps{grid-template-columns:1fr}.download-main,.qr-card,.support-panel{padding:23px}.footer-grid{grid-template-columns:1fr;gap:27px}.footer-brand{grid-column:auto}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:8px}.actions .btn{width:100%}}

/* roulang page: category3 */
:root{--green:#0d5a4b;--deep:#12372f;--ink:#17221e;--muted:#5d6964;--paper:#f7f5ef;--card:#fffdf8;--mint:#ddebe2;--line:#ccd7d0;--orange:#e8734f;--shadow:0 16px 40px rgba(23,34,30,.08);--radius:18px}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
    a{color:inherit;text-decoration:none}
    a:focus-visible,button:focus-visible{outline:3px solid rgba(232,115,79,.55);outline-offset:3px}
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .site-header{height:76px;background:rgba(255,253,248,.95);border-bottom:1px solid rgba(204,215,208,.7);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;white-space:nowrap}
    .logo-mark{width:34px;height:34px;border:2px solid var(--green);border-radius:10px 10px 14px 14px;position:relative}
    .logo-mark:before,.logo-mark:after{content:"";position:absolute;background:var(--green);border-radius:4px}
    .logo-mark:before{width:16px;height:3px;left:7px;top:9px;box-shadow:0 7px 0 var(--green),0 14px 0 var(--green)}
    .logo-mark:after{width:4px;height:22px;left:14px;top:5px;background:var(--mint);z-index:-1}
    .nav{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:10px;position:relative;transition:.25s}
    .nav a:hover,.nav a.active{color:var(--green);background:var(--mint)}
    .nav a.active:after{content:"";height:2px;width:20px;background:var(--green);position:absolute;bottom:3px;left:calc(50% - 10px)}
    .header-action,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border-radius:11px;border:1px solid var(--green);font-weight:700;transition:.25s}
    .header-action,.btn-primary{background:var(--green);color:#fffdf8}
    .header-action:hover,.btn-primary:hover{background:#084438;transform:translateY(-2px);box-shadow:0 8px 18px rgba(13,90,75,.18)}
    .btn-secondary{color:var(--green);background:transparent}
    .btn-secondary:hover{background:var(--mint);transform:translateY(-2px)}
    .menu-toggle{display:none;background:none;border:0;color:var(--green);font-size:26px}
    main{overflow:hidden}
    .page-head{padding:66px 0 54px;background:linear-gradient(110deg,#eef4ed 0%,var(--paper) 68%);border-bottom:1px solid var(--line);position:relative}
    .page-head:after{content:"";position:absolute;right:-100px;top:-150px;width:390px;height:390px;border:1px solid rgba(13,90,75,.12);border-radius:50%;box-shadow:0 0 0 30px rgba(13,90,75,.035),0 0 0 62px rgba(13,90,75,.025)}
    .breadcrumb{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:24px}
    .breadcrumb a:hover{color:var(--green);text-decoration:underline;text-decoration-thickness:2px}
    .breadcrumb span{color:#a5b4ab}
    .eyebrow,.badge{display:inline-flex;align-items:center;gap:7px;color:var(--green);background:var(--mint);padding:5px 11px;border-radius:8px;font-size:13px;font-weight:700}
    .eyebrow:before{content:"";width:7px;height:7px;background:var(--orange);border-radius:50%}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,62px);line-height:1.15;letter-spacing:-1px;margin:16px 0 16px;font-weight:800;max-width:700px}
    .page-lead{max-width:670px;color:var(--muted);font-size:18px;margin-bottom:26px}
    .meta-line{display:flex;gap:20px;flex-wrap:wrap;color:var(--muted);font-size:13px}
    .meta-line strong{color:var(--green)}
    .section{padding:78px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:32px}
    .section-kicker{color:var(--green);font-size:13px;font-weight:800;letter-spacing:1px}
    .section h2{font-size:clamp(26px,3vw,38px);line-height:1.25;margin:8px 0 0}
    .section-intro{color:var(--muted);max-width:570px}
    .route-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .route-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;min-height:205px;position:relative;transition:.25s}
    .route-card:hover,.guide-card:hover,.feature-panel:hover,.notice-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#a9c7b7}
    .route-number{font-size:14px;color:var(--orange);font-weight:800;letter-spacing:1px}
    .route-card h3{font-size:20px;margin:28px 0 8px}
    .route-card p,.guide-card p,.notice-card p{color:var(--muted);font-size:14px;margin-bottom:0}
    .route-card:after{content:"→";position:absolute;right:20px;top:20px;color:var(--green);font-size:22px}
    .guide-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:stretch}
    .guide-list{display:grid;gap:13px}
    .guide-card{display:grid;grid-template-columns:58px 1fr auto;gap:18px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:15px;padding:20px 22px;transition:.25s}
    .guide-index{width:42px;height:42px;border-radius:12px;background:var(--mint);color:var(--green);display:grid;place-items:center;font-weight:800}
    .guide-card h3{font-size:18px;margin:0 0 4px}
    .read-time{font-size:12px;color:var(--muted);white-space:nowrap}
    .guide-card .arrow{font-size:22px;color:var(--green)}
    .guide-aside{background:var(--deep);color:#fffdf8;border-radius:22px;padding:32px;position:relative;overflow:hidden}
    .guide-aside:after{content:"";position:absolute;width:220px;height:220px;border:1px solid rgba(155,199,178,.25);border-radius:50%;right:-90px;bottom:-90px}
    .guide-aside h3{font-size:25px;line-height:1.35;max-width:230px}
    .guide-aside p{color:#bfd2c7;font-size:14px}
    .aside-list{margin:28px 0 0;padding:0;list-style:none}
    .aside-list li{border-top:1px solid rgba(191,210,199,.2);padding:12px 0;color:#d9e7df;font-size:14px}
    .feature-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:27px;min-height:225px;transition:.25s}
    .feature-panel:nth-child(2){background:#edf4ee}
    .feature-icon{width:44px;height:44px;border:1px solid #a9c7b7;border-radius:13px;display:grid;place-items:center;color:var(--green);font-weight:800;font-size:19px}
    .feature-panel h3{font-size:20px;margin:22px 0 8px}
    .feature-panel p{color:var(--muted);font-size:14px}
    .notice-section{background:#f0eee6}
    .notice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .notice-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:23px;transition:.25s}
    .notice-card .badge{font-size:12px;margin-bottom:20px}
    .notice-card h3{font-size:18px;line-height:1.45;margin-bottom:10px}
    .tips-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:center}
    .shield-art{min-height:280px;border-radius:24px;background:var(--mint);display:grid;place-items:center;position:relative}
    .shield{width:112px;height:135px;border:4px solid var(--green);border-radius:52% 52% 58% 58%;display:grid;place-items:center;color:var(--green);font-size:42px;font-weight:800;background:rgba(255,253,248,.42)}
    .tip-list{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .tip{border-left:3px solid var(--green);padding-left:16px}
    .tip b{display:block;font-size:16px;margin-bottom:4px}
    .tip span{font-size:14px;color:var(--muted)}
    .channel-section{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:34px}
    .channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:25px}
    .channel-card{padding:19px;border-radius:14px;background:#f2f6f0;border:1px solid transparent;transition:.25s}
    .channel-card:hover{border-color:#a9c7b7;background:var(--mint)}
    .channel-card b{display:block;color:var(--green);margin-bottom:5px}
    .channel-card span{font-size:13px;color:var(--muted)}
    .support-band{padding:32px 0 88px}
    .final-cta{background:var(--mint);border-radius:24px;padding:38px 42px;display:flex;justify-content:space-between;align-items:center;gap:25px}
    .final-cta h2{font-size:28px;margin:0 0 6px}
    .final-cta p{color:var(--muted);margin:0}
    .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
    .site-footer{background:var(--deep);color:#fffdf8;padding:62px 0 22px}
    .footer-grid{display:grid;grid-template-columns:1.35fr .8fr .9fr 1fr;gap:35px}
    .footer-brand .logo{color:#fffdf8;margin-bottom:17px}
    .footer-brand .logo-mark{border-color:#b8d7c5}
    .footer-brand .logo-mark:before{background:#b8d7c5;box-shadow:0 7px 0 #b8d7c5,0 14px 0 #b8d7c5}
    .footer-brand p{color:#bfd2c7;font-size:14px;max-width:270px}
    .site-footer h3{font-size:15px;margin:3px 0 16px}
    .site-footer ul{list-style:none;padding:0;margin:0}
    .site-footer li{margin:8px 0;color:#bfd2c7;font-size:14px}
    .site-footer li a:hover{color:#fffdf8;text-decoration:underline;text-decoration-thickness:2px}
    .footer-download{border:1px solid rgba(191,210,199,.25);border-radius:16px;padding:20px;background:rgba(255,255,255,.035)}
    .footer-download b{display:block;margin-bottom:8px}
    .footer-download p,.footer-download span{color:#bfd2c7;font-size:13px}
    .footer-bottom{border-top:1px solid rgba(191,210,199,.2);margin-top:42px;padding-top:19px;display:flex;justify-content:space-between;gap:20px;color:#9fb8aa;font-size:12px}
    @media(max-width:1024px){
      .header-inner{gap:15px}.nav a{padding:8px 8px}.header-action{padding:0 14px}
      .route-grid{grid-template-columns:repeat(2,1fr)}.guide-layout,.tips-layout{grid-template-columns:1fr}.guide-aside{min-height:220px}
    }
    @media(max-width:768px){
      .site-header,.header-inner{height:68px}.header-inner{position:relative}.logo{font-size:15px}.logo-mark{width:30px;height:30px}
      .menu-toggle{display:block;margin-left:auto}.nav{display:none;position:absolute;left:0;right:0;top:68px;background:var(--card);padding:12px 20px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav.open{display:flex}.nav a{min-height:44px}.header-action{display:none}
      .container{width:min(100% - 30px,1180px)}.page-head{padding:48px 0 42px}h1{font-size:42px}
      .section{padding:58px 0}.section-head{display:block}.section-intro{margin-top:12px}.feature-strip,.notice-grid,.channel-grid{grid-template-columns:1fr}
      .tip-list{grid-template-columns:1fr}.final-cta{padding:28px;display:block}.cta-actions{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}.footer-brand,.footer-download{grid-column:span 2}.footer-bottom{display:block}.footer-bottom span{display:block;margin:6px 0}
    }
    @media(max-width:520px){
      .route-grid{grid-template-columns:1fr}.guide-card{grid-template-columns:48px 1fr}.guide-card .arrow{display:none}.read-time{grid-column:2}
      h1{font-size:35px}.page-lead{font-size:16px}.meta-line{gap:10px;display:block}.meta-line span{display:block;margin:5px 0}
      .footer-grid{grid-template-columns:1fr}.footer-brand,.footer-download{grid-column:auto}
    }