/* roulang page: index */
:root{
  --ink:#17121f;
  --ink-2:#211a2d;
  --panel:#292038;
  --panel-2:#322644;
  --line:#493858;
  --text:#fff9f1;
  --muted:#bdb1c9;
  --orange:#ff765d;
  --orange-2:#ff967d;
  --mint:#9af5c7;
  --mint-deep:#50d79d;
  --yellow:#ffd27c;
  --shadow:0 18px 55px rgba(0,0,0,.28);
  --radius:18px;
  --radius-sm:10px;
  --container:1240px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;background:var(--ink);color:var(--text);line-height:1.7;font-size:15px;overflow-x:hidden}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.22;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,black,transparent 70%);z-index:-1}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{border:0;cursor:pointer}
img{display:block;max-width:100%}
.container{width:min(var(--container),calc(100% - 48px));margin:auto}
.site-header{height:82px;border-bottom:1px solid rgba(255,255,255,.08);background:rgba(23,18,31,.92);backdrop-filter:blur(12px);position:sticky;top:0;z-index:20}
.navbar{height:100%;display:flex;align-items:center;gap:32px}
.logo{font-weight:800;letter-spacing:-.04em;font-size:20px;white-space:nowrap}
.logo i{font-style:normal;color:var(--orange)}
.nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
.nav-links a{color:var(--muted);padding:9px 13px;border-radius:8px;transition:.22s ease}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}
.nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
.nav-action{margin-left:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 20px;border-radius:9px;font-weight:700;transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s}
.btn-primary{background:var(--orange);color:#21131a;box-shadow:0 9px 24px rgba(255,118,93,.2)}
.btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}
.btn-primary:active{transform:translateY(1px);box-shadow:none}
.btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}
.btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
.btn:focus-visible,.nav-links a:focus-visible,.faq-q:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
.btn:disabled{cursor:not-allowed;opacity:.45;filter:grayscale(.4)}
.menu-toggle{display:none;background:none;color:var(--text);font-size:25px}
.hero{padding:82px 0 58px;position:relative}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr);gap:70px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:18px}
.eyebrow:before{content:"";width:25px;height:2px;background:var(--orange)}
.hero h1{font-size:clamp(36px,5vw,68px);line-height:1.16;letter-spacing:-.055em;max-width:720px}
.hero h1 em{color:var(--orange);font-style:normal}
.hero-copy{color:var(--muted);font-size:17px;max-width:625px;margin:23px 0 30px}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap}
.hero-note{display:flex;align-items:center;gap:10px;margin-top:27px;color:#9d91aa;font-size:13px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--mint-deep);box-shadow:0 0 0 5px rgba(80,215,157,.12)}
.hero-art{min-height:420px;position:relative;padding:22px}
.art-frame{height:100%;min-height:376px;border:1px solid #513d5c;border-radius:26px;background:linear-gradient(145deg,#332744,#211928);box-shadow:var(--shadow);overflow:hidden;position:relative}
.art-frame:before{content:"";position:absolute;inset:0;background:linear-gradient(125deg,transparent 25%,rgba(255,118,93,.14) 25.2%,transparent 49%,rgba(154,245,199,.07) 49.2%,transparent 72%);opacity:.8}
.art-glow{position:absolute;width:260px;height:260px;right:-80px;top:-90px;border-radius:50%;background:rgba(255,118,93,.24);filter:blur(35px)}
.art-top{display:flex;justify-content:space-between;padding:21px;border-bottom:1px solid rgba(255,255,255,.1);position:relative}
.art-top strong{font-size:18px}.status{color:var(--mint);font-size:12px;display:flex;align-items:center;gap:7px}
.art-content{padding:28px;position:relative}
.score-line{height:11px;background:#493552;border-radius:8px;margin:13px 0 25px;overflow:hidden}.score-line span{display:block;width:72%;height:100%;background:var(--orange);border-radius:inherit}
.art-columns{display:grid;grid-template-columns:1.25fr .75fr;gap:13px}
.art-tile{min-height:130px;border:1px solid #59415d;background:#2a2037;border-radius:14px;padding:17px}.art-tile.large{min-height:205px;background:linear-gradient(145deg,#493047,#292039)}
.art-tile b{font-size:28px;display:block;color:var(--yellow);line-height:1.2}.art-tile small{color:var(--muted)}
.art-lines{margin-top:20px;display:grid;gap:8px}.art-lines span{height:7px;background:#5a4760;border-radius:5px}.art-lines span:nth-child(2){width:75%}.art-lines span:nth-child(3){width:53%}
.section{padding:76px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
.kicker{color:var(--orange);font-size:13px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-bottom:8px}
.section h2{font-size:clamp(27px,3.5vw,42px);line-height:1.25;letter-spacing:-.04em}
.section-intro{color:var(--muted);max-width:560px}
.quick-nav{display:grid;grid-template-columns:1.25fr 1fr 1fr 1fr 1fr;gap:10px}
.quick-item{min-height:132px;padding:21px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);transition:.2s}
.quick-item:first-child{background:var(--orange);color:#25151c;border-color:var(--orange)}
.quick-item:hover{transform:translateY(-4px);border-color:var(--orange);box-shadow:0 12px 30px rgba(0,0,0,.2)}
.quick-icon{font-size:20px;margin-bottom:15px}.quick-item h3{font-size:17px;margin-bottom:4px}.quick-item p{font-size:12px;color:var(--muted)}.quick-item:first-child p{color:#5b3030}
.news-layout{display:grid;grid-template-columns:290px 1fr;gap:48px;align-items:start}
.news-aside{position:sticky;top:110px}.news-aside p{color:var(--muted);margin:16px 0 25px}
.tag-row{display:flex;gap:8px;flex-wrap:wrap}.tag{border:1px solid var(--line);color:var(--muted);padding:5px 10px;border-radius:100px;font-size:12px}.tag.hot{border-color:rgba(154,245,199,.4);color:var(--mint)}
.news-list{border-top:1px solid var(--line)}
.news-item{display:grid;grid-template-columns:110px 1fr 80px;gap:20px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);transition:.2s}
.news-item:hover{padding-left:8px;padding-right:8px;background:rgba(255,255,255,.025)}
.news-meta{color:var(--muted);font-size:12px}.news-meta strong{display:block;color:var(--mint);font-size:12px;margin-bottom:5px}
.news-item h3{font-size:17px;line-height:1.45;margin-bottom:5px}.news-item p{color:var(--muted);font-size:13px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.arrow{color:var(--orange);font-size:22px;text-align:right}
.empty-state{padding:35px 0;color:var(--muted);border-bottom:1px solid var(--line)}
.content-showcase{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
.feature-panel,.side-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);overflow:hidden}
.feature-panel{min-height:300px;padding:34px;position:relative;background:linear-gradient(135deg,#3b2940,#251c31)}
.feature-panel:after{content:"DF";position:absolute;right:25px;bottom:-30px;color:rgba(255,118,93,.13);font-size:190px;font-weight:900;line-height:1}
.feature-panel h3{font-size:29px;max-width:420px;position:relative;z-index:1}.feature-panel p{color:var(--muted);max-width:430px;margin:14px 0 25px;position:relative;z-index:1}
.side-panel{display:grid;grid-template-rows:1fr 1fr}.side-row{padding:25px;border-bottom:1px solid var(--line)}.side-row:last-child{border:0}.side-row span{color:var(--mint);font-size:12px}.side-row h3{font-size:19px;margin:5px 0}.side-row p{color:var(--muted);font-size:13px}
.download{padding:32px;border:1px solid #70434c;border-radius:var(--radius);background:linear-gradient(110deg,#342333,#281c31);display:grid;grid-template-columns:1fr 260px 190px;align-items:center;gap:30px;box-shadow:0 18px 50px rgba(255,118,93,.08)}
.download h2{font-size:32px}.download p{color:var(--muted);margin-top:9px}.device{height:128px;border:5px solid #806073;border-radius:24px;position:relative;width:76px;margin:auto;background:#211827}.device:before{content:"";position:absolute;left:10px;right:10px;top:19px;height:45px;border-radius:5px;background:var(--orange)}.device:after{content:"";position:absolute;left:28px;bottom:8px;width:12px;height:4px;background:#806073;border-radius:3px}.download-detail{display:flex;gap:10px;align-items:center}.qr{width:78px;height:78px;padding:7px;background:#fff;display:grid;grid-template-columns:repeat(5,1fr);gap:3px}.qr i{background:#241b2b}.qr i:nth-child(2n){background:transparent}.compat{font-size:12px;color:var(--mint)}
.faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:65px}.faq-lead p{color:var(--muted);margin-top:15px}.faq-list{border-top:1px solid var(--line)}.faq{border-bottom:1px solid var(--line)}.faq-q{width:100%;display:flex;justify-content:space-between;gap:15px;text-align:left;color:var(--text);background:none;padding:19px 0;font-weight:700}.faq-q span:last-child{color:var(--orange);font-size:21px;transition:.2s}.faq.open .faq-q span:last-child{transform:rotate(45deg)}.faq-a{display:none;color:var(--muted);padding:0 38px 19px 0;font-size:14px}.faq.open .faq-a{display:block}
.cta{padding:38px 42px;border-radius:var(--radius);background:var(--mint);color:#17231f;display:flex;align-items:center;justify-content:space-between;gap:25px}.cta h2{font-size:30px;line-height:1.3}.cta p{margin-top:7px;color:#416456}.cta .btn-primary{background:var(--ink);color:var(--text);box-shadow:none}.cta .btn-primary:hover{background:#30233c}
.site-footer{margin-top:78px;border-top:1px solid var(--line);padding:45px 0 24px;background:#120e19}.footer-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer-brand p{color:var(--muted);max-width:270px;margin-top:13px;font-size:13px}.footer-col h3{font-size:14px;margin-bottom:14px}.footer-col a{display:block;color:var(--muted);font-size:13px;margin:7px 0;transition:.2s}.footer-col a:hover{color:var(--orange)}.footer-bottom{border-top:1px solid var(--line);margin-top:36px;padding-top:19px;color:#827689;font-size:12px;display:flex;justify-content:space-between;gap:15px}
@media (max-width:1024px){.hero-grid{gap:35px}.quick-nav{grid-template-columns:repeat(3,1fr)}.quick-item:first-child{grid-column:span 2}.download{grid-template-columns:1fr 170px 170px}.nav-links a{padding:8px 8px;font-size:13px}}
@media (max-width:768px){.container{width:min(100% - 34px,var(--container))}.site-header{height:70px}.navbar{gap:15px}.logo{font-size:17px}.menu-toggle{display:block;margin-left:auto}.nav-links{display:none;position:absolute;top:70px;left:0;right:0;padding:12px 17px 18px;background:#1c1526;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch}.nav-links.show{display:flex}.nav-links a{padding:12px}.nav-action{display:none}.hero{padding:57px 0 35px}.hero-grid,.news-layout,.faq-grid,.content-showcase{grid-template-columns:1fr}.hero-art{min-height:330px;padding:8px}.art-frame{min-height:310px}.news-aside{position:static}.news-item{grid-template-columns:82px 1fr 25px;gap:12px}.news-item p{display:none}.download{grid-template-columns:1fr 100px;padding:27px}.download-detail{grid-column:1/-1;grid-row:2}.download .btn{grid-column:1/-1}.footer-main{grid-template-columns:1.5fr 1fr 1fr}.footer-col:last-child{display:none}.section{padding:55px 0}.section-head{display:block}.section-intro{margin-top:12px}}
@media (max-width:520px){body{font-size:14px}.hero h1{font-size:36px}.hero-copy{font-size:15px}.hero-actions .btn{width:100%}.quick-nav{grid-template-columns:1fr 1fr}.quick-item:first-child{grid-column:span 2}.quick-item{min-height:120px;padding:16px}.news-item{grid-template-columns:1fr 25px}.news-meta{display:flex;gap:10px;align-items:center}.news-meta strong{margin:0}.download h2{font-size:26px}.download{grid-template-columns:1fr 75px}.download-detail{align-items:flex-start}.qr{width:65px;height:65px}.cta{display:block;padding:28px 24px}.cta h2{font-size:25px}.cta .btn{width:100%;margin-top:20px}.footer-main{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}}

/* roulang page: index */
:root{
  --ink:#17131f;
  --bg:#211a2b;
  --bg-deep:#130f1a;
  --panel:#2b2137;
  --panel-2:#33263f;
  --line:#4a3855;
  --line-soft:rgba(255,255,255,.1);
  --text:#fff8f1;
  --muted:#b9aebe;
  --orange:#ff765b;
  --orange-light:#ff9a77;
  --mint:#9cf1cb;
  --mint-deep:#58d7a5;
  --yellow:#ffd28a;
  --radius:18px;
  --shadow:0 18px 45px rgba(0,0,0,.24);
  --ease:all .25s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  line-height:1.75;
  overflow-x:hidden;
}
body:before{
  content:"";position:fixed;inset:0;pointer-events:none;opacity:.3;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:48px 48px;mask-image:linear-gradient(to bottom,#000,transparent 75%);
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input{font:inherit}
button{cursor:pointer}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{
  position:sticky;top:0;z-index:20;background:rgba(25,18,32,.9);
  border-bottom:1px solid var(--line-soft);backdrop-filter:blur(12px)
}
.navbar{height:78px;display:flex;align-items:center;gap:28px}
.logo{font-weight:900;letter-spacing:-.04em;font-size:20px;white-space:nowrap}
.logo span{color:var(--orange)}
.nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
.nav-links a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:10px;transition:var(--ease)}
.nav-links a:hover,.nav-links a.active{background:rgba(255,118,91,.12);color:var(--text)}
.nav-action{margin-left:8px}
.menu-toggle{display:none;border:1px solid var(--line);background:transparent;color:var(--text);padding:8px 11px;border-radius:9px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  min-height:46px;padding:0 20px;border-radius:10px;border:1px solid transparent;
  font-weight:800;font-size:14px;transition:var(--ease)
}
.btn-primary{background:var(--orange);color:var(--ink);box-shadow:0 8px 22px rgba(255,118,91,.2)}
.btn-primary:hover{background:var(--orange-light);transform:translateY(-2px);box-shadow:0 11px 28px rgba(255,118,91,.3)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.025)}
.btn-outline:hover{border-color:var(--mint-deep);color:var(--mint);background:rgba(156,241,203,.06)}
.btn:focus-visible,.faq-question:focus-visible,.nav-links a:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}
.btn:disabled{background:#655866;color:#a89ba8;cursor:not-allowed;box-shadow:none}
.hero{padding:95px 0 76px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;color:var(--mint);font-size:13px;font-weight:800;letter-spacing:.08em;margin-bottom:20px}
.eyebrow:before{content:"";width:26px;height:2px;background:var(--orange)}
h1{font-size:clamp(40px,5.3vw,72px);line-height:1.12;letter-spacing:-.055em;max-width:720px}
.hero-copy{font-size:18px;color:var(--muted);max-width:590px;margin:25px 0 30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-note{display:flex;gap:24px;margin-top:34px;color:var(--muted);font-size:13px}
.hero-note strong{display:block;color:var(--text);font-size:15px}
.visual-stage{min-height:410px;position:relative;display:flex;align-items:center;justify-content:center}
.visual-stage:before{content:"";position:absolute;width:320px;height:320px;border:1px solid rgba(255,118,91,.35);transform:rotate(45deg);border-radius:45px}
.visual-stage:after{content:"";position:absolute;width:210px;height:210px;background:var(--orange);opacity:.13;filter:blur(45px);border-radius:50%}
.console{width:min(410px,100%);position:relative;z-index:1;background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;padding:22px;transform:rotate(-3deg)}
.console-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line-soft);padding-bottom:16px;margin-bottom:22px}
.console-title{font-weight:900}.status{color:var(--mint);font-size:12px}
.console-main{border:1px solid var(--line);background:var(--bg-deep);padding:23px;border-radius:14px}
.console-main small{color:var(--muted)}
.console-main h2{font-size:29px;margin:5px 0 18px}
.progress{height:7px;background:#403348;border-radius:8px;overflow:hidden}
.progress i{display:block;height:100%;width:68%;background:var(--orange);border-radius:8px}
.console-bottom{display:flex;gap:10px;margin-top:18px}
.mini-block{flex:1;padding:12px;background:rgba(156,241,203,.07);border:1px solid rgba(156,241,203,.22);border-radius:10px}
.mini-block b{display:block;color:var(--mint)}
.section{padding:82px 0}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:30px}
.section-kicker{color:var(--orange);font-size:13px;font-weight:900;letter-spacing:.12em}
h2{font-size:clamp(28px,3.2vw,43px);line-height:1.25;letter-spacing:-.035em}
.section-lead{color:var(--muted);max-width:540px;font-size:15px}
.quick-nav{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr 1fr;gap:10px}
.quick-item{min-height:142px;padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:var(--ease)}
.quick-item:first-child{background:var(--orange);color:var(--ink);border-color:var(--orange)}
.quick-item:hover{transform:translateY(-4px);border-color:var(--orange-light);box-shadow:var(--shadow)}
.quick-icon{font-size:23px;margin-bottom:15px}.quick-item h3{font-size:17px}.quick-item p{font-size:12px;color:var(--muted);line-height:1.5;margin-top:5px}.quick-item:first-child p{color:#5e3430}
.updates{display:grid;grid-template-columns:3fr 8fr;gap:45px}
.update-side{border-left:2px solid var(--orange);padding-left:22px}
.update-side p{color:var(--muted);font-size:14px;margin-top:13px}
.filter-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.tag{display:inline-flex;align-items:center;padding:4px 10px;border-radius:5px;background:rgba(156,241,203,.1);color:var(--mint);font-size:12px;font-weight:800}
.tag.orange{background:rgba(255,118,91,.12);color:var(--orange-light)}
.news-list{border-top:1px solid var(--line)}
.news-item{display:grid;grid-template-columns:110px 1fr 90px;gap:20px;align-items:center;padding:21px 0;border-bottom:1px solid var(--line);transition:var(--ease)}
.news-item:hover{padding-left:10px;background:rgba(255,255,255,.025)}
.news-date{color:var(--muted);font-size:12px}.news-body h3{font-size:17px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.news-body p{color:var(--muted);font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.news-arrow{color:var(--orange);text-align:right;font-weight:900}
.empty-state{padding:34px 0;color:var(--muted);border-bottom:1px solid var(--line)}
.content-showcase{display:grid;grid-template-columns:1.25fr .75fr;gap:16px}
.feature-panel,.side-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:30px;position:relative;overflow:hidden}
.feature-panel{min-height:310px;background:linear-gradient(135deg,#392742,#282033)}
.feature-panel:after{content:"DF";position:absolute;right:-15px;bottom:-55px;font-size:190px;font-weight:900;color:rgba(255,118,91,.1)}
.feature-panel>*{position:relative;z-index:1}
.feature-panel h3{font-size:31px;max-width:420px;margin:15px 0}.feature-panel p{color:var(--muted);max-width:470px}
.side-stack{display:grid;gap:16px}.side-panel{min-height:147px}.side-panel h3{font-size:20px;margin:10px 0 3px}.side-panel p{font-size:13px;color:var(--muted)}
.download-wrap{background:var(--orange);color:var(--ink);border-radius:24px;padding:45px;display:grid;grid-template-columns:1.4fr .8fr .45fr;align-items:center;gap:30px;box-shadow:0 18px 50px rgba(255,118,91,.14)}
.download-wrap p{color:#633832;margin-top:10px;max-width:560px}.download-wrap .btn{background:var(--ink);color:var(--text)}.download-wrap .btn:hover{background:#3a2939}
.device-lines{display:flex;gap:10px;align-items:end;height:110px}.device-lines i{display:block;width:30px;background:rgba(23,19,31,.18);border-radius:5px 5px 0 0}.device-lines i:nth-child(1){height:42px}.device-lines i:nth-child(2){height:78px}.device-lines i:nth-child(3){height:105px;background:rgba(23,19,31,.38)}
.qr-box{width:112px;height:112px;background:repeating-linear-gradient(45deg,#211a2b 0 4px,#fff0 4px 8px),#fff;border:8px solid #fff;border-radius:8px;margin:auto}
.faq-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:60px}.faq-intro p{color:var(--muted);margin-top:14px}
.faq-list{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:20px 0;background:none;border:0;color:var(--text);text-align:left;font-weight:800}.faq-question span{color:var(--orange);font-size:22px;transition:var(--ease)}.faq-answer{display:none;color:var(--muted);font-size:14px;padding:0 35px 20px 0}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span{transform:rotate(45deg)}
.cta{padding:25px 30px;border:1px solid var(--line);border-radius:var(--radius);display:flex;align-items:center;justify-content:space-between;gap:25px;background:var(--panel)}.cta p{color:var(--muted);font-size:14px;margin-top:4px}
.site-footer{padding:55px 0 25px;border-top:1px solid var(--line-soft);background:var(--bg-deep)}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}.footer-brand p{color:var(--muted);font-size:13px;max-width:300px;margin-top:13px}.footer-col h4{font-size:14px;margin-bottom:14px}.footer-col a{display:block;color:var(--muted);font-size:13px;margin:7px 0;transition:var(--ease)}.footer-col a:hover{color:var(--orange-light);padding-left:3px}.copyright{border-top:1px solid var(--line-soft);margin-top:38px;padding-top:18px;color:#887b8d;font-size:12px;display:flex;justify-content:space-between}
@media(max-width:1024px){.nav-links a{padding:8px 7px}.hero-grid{gap:35px}.quick-nav{grid-template-columns:repeat(3,1fr)}.quick-item:first-child{grid-column:span 2}.download-wrap{grid-template-columns:1fr .7fr}.qr-box{display:none}}
@media(max-width:768px){.container{width:min(100% - 30px,600px)}.navbar{height:68px}.nav-action{margin-left:auto}.nav-links{display:none;position:absolute;top:68px;left:0;right:0;padding:12px 15px 18px;background:var(--bg-deep);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch}.nav-links.show{display:flex}.nav-links a{padding:12px 15px}.menu-toggle{display:block}.hero{padding:60px 0 45px}.hero-grid,.updates,.content-showcase,.faq-grid{grid-template-columns:1fr}.visual-stage{min-height:330px;margin-top:20px}.section{padding:58px 0}.section-head{display:block}.section-lead{margin-top:12px}.quick-nav{grid-template-columns:repeat(2,1fr)}.quick-item:first-child{grid-column:span 2}.news-item{grid-template-columns:75px 1fr 20px;gap:10px}.news-body p{display:none}.download-wrap{grid-template-columns:1fr;padding:30px}.device-lines{display:none}.footer-grid{grid-template-columns:1fr 1fr}.copyright{display:block}.copyright span{display:block;margin-top:5px}}
@media(max-width:520px){h1{font-size:39px}.hero-copy{font-size:16px}.hero-note{gap:14px}.quick-item{min-height:125px;padding:17px}.news-item{grid-template-columns:1fr 20px}.news-date{display:none}.feature-panel{min-height:290px;padding:24px}.feature-panel h3{font-size:26px}.cta{display:block;padding:24px}.cta .btn{margin-top:18px;width:100%}.footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:span 2}}

/* roulang page: article */
:root{
      --ink:#17121f;--ink-2:#211a2d;--panel:#292038;--panel-2:#322644;
      --line:#493858;--line-soft:rgba(255,255,255,.1);--text:#fff9f1;
      --muted:#bdb1c9;--orange:#ff765d;--orange-2:#ff967d;--mint:#9af5c7;
      --mint-deep:#50d79d;--yellow:#ffd27c;--shadow:0 18px 55px rgba(0,0,0,.28);
      --radius:18px;--radius-sm:10px;--container:1240px;--ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--ink);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:15px;line-height:1.75;overflow-x:hidden}
    body:before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.2;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,#000,transparent 75%)}
    a{color:inherit;text-decoration:none}button,input{font:inherit}button{border:0;cursor:pointer}img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{height:82px;position:sticky;top:0;z-index:30;border-bottom:1px solid rgba(255,255,255,.08);background:rgba(23,18,31,.94);backdrop-filter:blur(12px)}
    .navbar{height:100%;display:flex;align-items:center;gap:30px}.logo{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}.logo span{color:var(--orange)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}.nav-links a{padding:9px 13px;border-radius:8px;color:var(--muted);transition:var(--ease)}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}.nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{margin-left:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 20px;border-radius:9px;font-weight:700;transition:var(--ease)}
    .btn-primary{background:var(--orange);color:#21131a;box-shadow:0 9px 24px rgba(255,118,93,.2)}.btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}.btn-primary:active{transform:translateY(1px);box-shadow:none}
    .btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}.btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
    .btn:focus-visible,.nav-links a:focus-visible,.menu-toggle:focus-visible{outline:3px solid var(--mint);outline-offset:3px}.btn:disabled{opacity:.45;cursor:not-allowed}
    .menu-toggle{display:none;background:none;color:var(--text);font-size:25px}
    .article-hero{padding:76px 0 54px;border-bottom:1px solid var(--line-soft);position:relative}
    .article-hero:after{content:"DF";position:absolute;right:5%;bottom:-30px;color:rgba(255,118,93,.05);font-size:180px;font-weight:900;line-height:1;pointer-events:none}
    .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-bottom:28px}.breadcrumb a:hover{color:var(--orange)}.breadcrumb .current{max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.crumb-sep{color:var(--orange)}
    .article-kicker{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-weight:700;font-size:13px;letter-spacing:.08em;margin-bottom:17px}.article-kicker:before{content:"";width:25px;height:2px;background:var(--orange)}
    .article-hero h1{max-width:900px;margin:0;font-size:clamp(32px,5vw,58px);line-height:1.25;letter-spacing:-.05em}
    .article-summary{max-width:770px;margin:21px 0 25px;color:var(--muted);font-size:17px}
    .article-meta{display:flex;flex-wrap:wrap;gap:10px 24px;color:var(--muted);font-size:13px}.article-meta strong{color:var(--mint);font-weight:600}
    .tag{display:inline-flex;border:1px solid var(--line);color:var(--muted);padding:4px 11px;border-radius:100px;font-size:12px}.tag.hot{border-color:rgba(154,245,199,.42);color:var(--mint)}
    .reading-area{padding:68px 0}.article-layout{display:grid;grid-template-columns:minmax(0,820px) 290px;gap:70px;align-items:start}
    .article-content{min-width:0;padding:42px 48px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .article-content h2{font-size:30px;line-height:1.35;margin:38px 0 15px;color:var(--text)}.article-content h3{font-size:22px;margin:30px 0 12px;color:var(--orange-2)}
    .article-content h2:first-child,.article-content h3:first-child{margin-top:0}.article-content p{color:#e4dce7;margin:0 0 20px}.article-content ul,.article-content ol{padding-left:24px;margin:0 0 24px;color:#e4dce7}.article-content li{margin:8px 0}
    .article-content blockquote{margin:28px 0;padding:18px 22px;border-left:3px solid var(--orange);background:rgba(255,118,93,.08);color:var(--yellow);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
    .article-content img{width:100%;height:auto;border-radius:12px;margin:28px 0}.article-content table{width:100%;margin:25px 0;border-collapse:collapse;background:var(--panel-2)}.article-content th,.article-content td{padding:12px;border:1px solid var(--line);text-align:left}.article-content th{color:var(--mint)}
    .empty-state{padding:42px 10px;text-align:center}.empty-state h2{margin:0 0 10px}.empty-state p{color:var(--muted);margin-bottom:22px}
    .side-stack{display:grid;gap:16px;position:sticky;top:110px}.side-card{padding:24px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm)}.side-card h3{font-size:17px;margin:0 0 14px}.side-card p{color:var(--muted);font-size:13px;margin:0 0 17px}.side-card ul{list-style:none;padding:0;margin:0}.side-card li{padding:10px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}.side-card li:last-child{border:0}.side-card li:before{content:"•";color:var(--orange);margin-right:9px}
    .article-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}.article-nav a{padding:18px;background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius-sm);transition:var(--ease)}.article-nav a:hover{border-color:var(--orange);transform:translateY(-2px)}.article-nav small{display:block;color:var(--mint);margin-bottom:5px}.article-nav span{font-weight:700}
    .cta-section{padding:25px 0 82px}.cta-box{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:35px 40px;border:1px solid rgba(255,118,93,.5);border-radius:var(--radius);background:linear-gradient(110deg,#38253b,#292038);box-shadow:0 18px 45px rgba(0,0,0,.22)}.cta-box h2{font-size:28px;margin:0 0 7px}.cta-box p{color:var(--muted);margin:0}
    .site-footer{padding:58px 0 22px;border-top:1px solid var(--line);background:#130f1a}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:35px}.footer-brand p{max-width:310px;color:var(--muted);font-size:13px;margin-top:16px}.footer-col h4{font-size:14px;margin:4px 0 14px;color:var(--yellow)}.footer-col a{display:block;color:var(--muted);font-size:13px;padding:4px 0;transition:var(--ease)}.footer-col a:hover{color:var(--orange)}
    .copyright{display:flex;justify-content:space-between;gap:18px;margin-top:45px;padding-top:18px;border-top:1px solid var(--line);color:#8e8199;font-size:12px}
    @media (max-width:1024px){.nav-links a{padding:8px 8px;font-size:13px}.navbar{gap:15px}.article-layout{grid-template-columns:minmax(0,1fr) 245px;gap:28px}.article-content{padding:34px}}
    @media (max-width:768px){.container{width:min(100% - 32px,var(--container))}.site-header{height:70px}.menu-toggle{display:block;margin-left:auto}.nav-action{margin-left:0}.nav-action .btn{min-height:40px;padding:0 14px;font-size:13px}.nav-links{display:none;position:absolute;top:70px;left:0;right:0;padding:12px 16px;flex-direction:column;align-items:stretch;background:var(--ink-2);border-bottom:1px solid var(--line);box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-links a{padding:12px 14px}.article-hero{padding:52px 0 42px}.article-layout{display:block}.side-stack{position:static;margin-top:24px;grid-template-columns:1fr 1fr}.article-content{padding:28px 22px}.article-content h2{font-size:25px}.cta-box{display:block;padding:28px 24px}.cta-box .btn{margin-top:22px}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.footer-col:last-child{grid-column:2}.footer-brand{grid-column:1/-1}}
    @media (max-width:520px){.logo{font-size:17px}.nav-action{display:none}.article-hero h1{font-size:32px}.article-summary{font-size:15px}.article-content{padding:23px 17px}.article-content h2{font-size:23px}.article-content h3{font-size:19px}.article-nav{grid-template-columns:1fr}.side-stack{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.footer-brand{grid-column:1/-1}.footer-col:last-child{grid-column:auto}.copyright{display:block}.copyright span{display:block;margin-top:5px}}

/* roulang page: category1 */
:root{
      --ink:#17121f;--ink-2:#211a2d;--panel:#292038;--panel-2:#322644;
      --line:#493858;--line-soft:rgba(255,255,255,.1);--text:#fff9f1;
      --muted:#bdb1c9;--orange:#ff765d;--orange-2:#ff967d;
      --mint:#9af5c7;--mint-deep:#50d79d;--yellow:#ffd27c;
      --shadow:0 18px 55px rgba(0,0,0,.28);--radius:18px;--radius-sm:10px;
      --container:1240px;--ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--ink);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
    body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.22;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,black,transparent 72%);z-index:-1}
    a{color:inherit;text-decoration:none}button,input{font:inherit}button{border:0;cursor:pointer}img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{height:82px;border-bottom:1px solid rgba(255,255,255,.08);background:rgba(23,18,31,.94);backdrop-filter:blur(12px);position:sticky;top:0;z-index:20}
    .navbar{height:100%;display:flex;align-items:center;gap:30px}
    .logo{font-weight:800;letter-spacing:-.04em;font-size:20px;white-space:nowrap}
    .logo span{color:var(--orange)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{color:var(--muted);padding:9px 13px;border-radius:8px;transition:var(--ease)}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}
    .nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{margin-left:13px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 20px;border-radius:9px;font-weight:700;transition:var(--ease)}
    .btn-primary{background:var(--orange);color:#21131a;box-shadow:0 9px 24px rgba(255,118,93,.2)}
    .btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}
    .btn-primary:active{transform:translateY(1px);box-shadow:none}
    .btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}
    .btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
    .btn:focus-visible,.nav-links a:focus-visible,.filter-btn:focus-visible,.faq-q:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    .menu-toggle{display:none;background:transparent;color:var(--text);font-size:25px}
    .page-hero{padding:78px 0 55px;border-bottom:1px solid var(--line-soft);position:relative}
    .page-hero:after{content:"NEWS";position:absolute;right:4%;bottom:-30px;color:rgba(255,118,93,.08);font-size:150px;font-weight:900;line-height:1}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:16px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--orange)}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,64px);line-height:1.16;letter-spacing:-.055em;margin-bottom:20px;position:relative;z-index:1}
    h1 em{font-style:normal;color:var(--orange)}
    .hero-copy{color:var(--muted);font-size:17px;max-width:720px;margin-bottom:28px}
    .hero-meta{display:flex;gap:24px;flex-wrap:wrap;color:var(--muted);font-size:13px}
    .hero-meta strong{color:var(--mint);font-weight:600}
    .section{padding:76px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
    .section h2{font-size:clamp(27px,3.5vw,42px);line-height:1.25;letter-spacing:-.04em;margin-bottom:8px}
    .section-intro{color:var(--muted);max-width:580px;margin:0}
    .filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
    .filter-btn{padding:8px 15px;border:1px solid var(--line);background:var(--panel);color:var(--muted);border-radius:99px;transition:var(--ease)}
    .filter-btn:hover,.filter-btn.active{border-color:var(--orange);color:var(--text);background:rgba(255,118,93,.12)}
    .news-feature{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;margin-bottom:34px}
    .feature-card,.notice-card{border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);overflow:hidden}
    .feature-card{min-height:315px;padding:35px;position:relative;background:linear-gradient(135deg,#402a42,#282039)}
    .feature-card:before{content:"";position:absolute;width:230px;height:230px;border:1px solid rgba(154,245,199,.16);border-radius:50%;right:30px;top:34px;box-shadow:0 0 0 25px rgba(154,245,199,.025),0 0 0 50px rgba(154,245,199,.02)}
    .feature-card > *{position:relative;z-index:1}
    .tag-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
    .tag{border:1px solid var(--line);color:var(--muted);padding:5px 10px;border-radius:100px;font-size:12px}
    .tag.hot{border-color:rgba(154,245,199,.4);color:var(--mint)}
    .feature-card h3{font-size:29px;line-height:1.35;max-width:560px;margin-bottom:13px}
    .feature-card p{color:var(--muted);max-width:560px;margin-bottom:25px}
    .notice-card{padding:0}
    .notice-line{padding:23px 25px;border-bottom:1px solid var(--line)}
    .notice-line:last-child{border-bottom:0}
    .notice-line small{color:var(--mint);font-size:12px}
    .notice-line h3{font-size:18px;line-height:1.45;margin:5px 0 3px}
    .notice-line p{color:var(--muted);font-size:13px;margin:0}
    .news-layout{display:grid;grid-template-columns:190px 1fr;gap:40px}
    .side-title{color:var(--muted);font-size:13px;line-height:1.8;padding-top:4px}
    .side-title strong{display:block;color:var(--text);font-size:22px;margin-bottom:7px}
    .news-list{border-top:1px solid var(--line)}
    .news-item{display:grid;grid-template-columns:115px 1fr 40px;gap:20px;align-items:center;padding:23px 0;border-bottom:1px solid var(--line);transition:var(--ease)}
    .news-item:hover{padding-left:10px;padding-right:10px;background:rgba(255,255,255,.025)}
    .news-meta{color:var(--muted);font-size:12px}
    .news-meta strong{display:block;color:var(--mint);font-size:12px;margin-bottom:5px}
    .news-item h3{font-size:18px;line-height:1.45;margin-bottom:5px}
    .news-item p{color:var(--muted);font-size:13px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;margin:0}
    .arrow{color:var(--orange);font-size:23px;text-align:right;transition:var(--ease)}
    .news-item:hover .arrow{transform:translateX(4px)}
    .update-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:44px}
    .update-box{padding:22px;background:var(--panel-2);border:1px solid var(--line);border-radius:var(--radius-sm)}
    .update-box b{display:block;color:var(--orange);font-size:26px;line-height:1.2;margin-bottom:5px}
    .update-box span{color:var(--muted);font-size:13px}
    .cta{padding:48px 52px;border:1px solid rgba(255,118,93,.45);border-radius:var(--radius);background:linear-gradient(110deg,#3b263d,#281d32);display:flex;align-items:center;justify-content:space-between;gap:28px}
    .cta h2{font-size:30px;margin-bottom:8px}
    .cta p{color:var(--muted);margin:0;max-width:650px}
    .site-footer{border-top:1px solid var(--line);padding:52px 0 25px;background:rgba(19,15,26,.6)}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
    .footer-brand p{color:var(--muted);font-size:13px;max-width:290px;margin-top:15px}
    .footer-col h4{font-size:14px;margin:3px 0 13px}
    .footer-col a{display:block;color:var(--muted);font-size:13px;margin:8px 0;transition:var(--ease)}
    .footer-col a:hover{color:var(--orange);padding-left:4px}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:38px;padding-top:18px;color:#8f8499;font-size:12px}
    @media(max-width:1024px){.nav-links a{padding-left:8px;padding-right:8px}.navbar{gap:15px}.news-feature{grid-template-columns:1fr 1fr}}
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:70px}.menu-toggle{display:block;margin-left:auto}.nav-action{margin-left:8px}.nav-action .btn{min-height:40px;padding:0 13px;font-size:13px}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:78px;padding:10px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{padding:12px 14px}
      .page-hero{padding:58px 0 42px}.page-hero:after{font-size:90px;bottom:-15px}
      .section{padding:55px 0}.section-head{display:block}.section-intro{margin-top:10px}
      .news-feature,.news-layout{grid-template-columns:1fr;gap:16px}.feature-card{min-height:285px}.news-layout{gap:25px}
      .news-item{grid-template-columns:88px 1fr 24px;gap:12px}.news-item h3{font-size:16px}
      .update-strip{grid-template-columns:1fr}.cta{display:block;padding:32px 25px}.cta .btn{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}
    }
    @media(max-width:520px){
      h1{font-size:38px}.hero-copy{font-size:15px}.hero-meta{gap:12px}
      .feature-card{padding:25px}.feature-card h3{font-size:24px}.notice-line{padding:18px}
      .news-item{grid-template-columns:1fr 25px}.news-meta{display:flex;gap:9px;margin-bottom:5px}.news-meta strong{margin:0}
      .news-item p{-webkit-line-clamp:2}.footer-grid{grid-template-columns:1fr}.copyright{display:block}.copyright span{display:block;margin:5px 0}
    }

/* roulang page: category3 */
:root{
      --ink:#17121f;
      --ink-2:#211a2d;
      --bg:#211a2b;
      --bg-deep:#130f1a;
      --panel:#292038;
      --panel-2:#322644;
      --line:#493858;
      --line-soft:rgba(255,255,255,.1);
      --text:#fff9f1;
      --muted:#bdb1c9;
      --orange:#ff765d;
      --orange-2:#ff967d;
      --mint:#9af5c7;
      --mint-deep:#50d79d;
      --yellow:#ffd27c;
      --shadow:0 18px 55px rgba(0,0,0,.28);
      --radius:18px;
      --radius-sm:10px;
      --container:1240px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
      background:var(--ink);
      color:var(--text);
      line-height:1.7;
      font-size:15px;
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.2;
      background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
      background-size:48px 48px;
      mask-image:linear-gradient(to bottom,black,transparent 75%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{
      height:82px;
      border-bottom:1px solid rgba(255,255,255,.08);
      background:rgba(23,18,31,.94);
      backdrop-filter:blur(12px);
      position:sticky;
      top:0;
      z-index:20;
    }
    .navbar{height:100%;display:flex;align-items:center;gap:30px}
    .logo{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .logo span{color:var(--orange)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{
      color:var(--muted);
      padding:9px 13px;
      border-radius:8px;
      transition:var(--ease);
    }
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}
    .nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{margin-left:12px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:0 20px;
      border-radius:9px;
      font-weight:700;
      transition:var(--ease);
    }
    .btn-primary{background:var(--orange);color:#25151c;box-shadow:0 9px 24px rgba(255,118,93,.2)}
    .btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}
    .btn-primary:active{transform:translateY(1px);box-shadow:none}
    .btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}
    .btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
    .btn:focus-visible,.nav-links a:focus-visible,.faq-q:focus-visible,.search-input:focus-visible{
      outline:3px solid var(--mint);outline-offset:3px
    }
    .menu-toggle{display:none;background:none;color:var(--text);font-size:25px}
    .crumbs{padding:27px 0 0;color:var(--muted);font-size:13px}
    .crumbs a:hover{color:var(--orange)}
    .crumbs b{color:var(--orange);font-weight:500;margin:0 8px}
    .guide-hero{padding:43px 0 70px;position:relative}
    .guide-hero:after{
      content:"03";
      position:absolute;
      right:2%;
      top:-20px;
      color:rgba(255,118,93,.08);
      font-size:220px;
      line-height:1;
      font-weight:900;
      pointer-events:none;
    }
    .hero-inner{position:relative;z-index:1;max-width:850px}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:17px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--orange)}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(38px,5.5vw,70px);line-height:1.15;letter-spacing:-.055em;margin-bottom:20px}
    h1 em{font-style:normal;color:var(--orange)}
    .hero-copy{max-width:700px;color:var(--muted);font-size:17px;margin-bottom:28px}
    .hero-actions{display:flex;gap:13px;flex-wrap:wrap}
    .section{padding:70px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:30px}
    .section h2{font-size:clamp(28px,3.5vw,43px);line-height:1.25;letter-spacing:-.04em;margin-bottom:0}
    .section-intro{color:var(--muted);max-width:570px;margin-bottom:0}
    .guide-layout{display:grid;grid-template-columns:300px minmax(0,1fr);gap:28px;align-items:start}
    .guide-menu{
      position:sticky;
      top:108px;
      padding:22px;
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:var(--radius);
    }
    .guide-menu-title{font-weight:800;margin-bottom:15px}
    .guide-menu a{
      display:flex;
      align-items:center;
      gap:12px;
      padding:13px 12px;
      color:var(--muted);
      border-bottom:1px solid rgba(255,255,255,.07);
      transition:var(--ease);
    }
    .guide-menu a:last-child{border-bottom:0}
    .guide-menu a:hover,.guide-menu a.current{color:var(--text);background:rgba(255,118,93,.1);border-radius:8px}
    .guide-menu i{font-style:normal;color:var(--orange);font-size:12px;font-weight:800}
    .steps{display:grid;gap:13px}
    .step{
      display:grid;
      grid-template-columns:66px 1fr;
      gap:20px;
      padding:27px 29px;
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:var(--radius);
      transition:var(--ease);
    }
    .step:hover{border-color:var(--orange);transform:translateX(4px);box-shadow:var(--shadow)}
    .step-number{
      width:48px;height:48px;border-radius:12px;
      display:grid;place-items:center;
      color:#25151c;background:var(--orange);
      font-weight:900;font-size:19px;
    }
    .step h3{font-size:21px;margin:0 0 7px}
    .step p{color:var(--muted);margin-bottom:0}
    .tip-panel{
      margin-top:22px;
      padding:20px 23px;
      border:1px solid rgba(154,245,199,.35);
      border-left:4px solid var(--mint);
      background:rgba(154,245,199,.06);
      border-radius:var(--radius-sm);
      color:var(--muted);
    }
    .tip-panel strong{color:var(--mint);display:block;margin-bottom:4px}
    .feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}
    .feature-card{
      padding:28px;
      background:var(--panel-2);
      border:1px solid var(--line);
      border-radius:var(--radius);
      transition:var(--ease);
    }
    .feature-card:hover{border-color:var(--mint);box-shadow:0 14px 35px rgba(0,0,0,.18)}
    .feature-card.wide{grid-column:span 2;background:linear-gradient(120deg,#35253e,#292038)}
    .feature-icon{font-size:25px;color:var(--orange);margin-bottom:13px}
    .feature-card h3{font-size:20px;margin-bottom:8px}
    .feature-card p{color:var(--muted);margin-bottom:0}
    .notice-band{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:28px;
      align-items:center;
      padding:36px;
      background:#34253b;
      border:1px solid var(--line);
      border-radius:var(--radius);
      overflow:hidden;
      position:relative;
    }
    .notice-band:after{content:"DF";position:absolute;right:20px;bottom:-55px;color:rgba(154,245,199,.08);font-size:190px;font-weight:900}
    .notice-band > *{position:relative;z-index:1}
    .notice-band h2{font-size:31px;margin-bottom:10px}
    .notice-band p{color:var(--muted);margin-bottom:0}
    .notice-list{display:grid;gap:10px}
    .notice-row{
      display:flex;align-items:center;gap:12px;
      padding:14px 16px;
      background:rgba(0,0,0,.18);
      border:1px solid rgba(255,255,255,.08);
      border-radius:10px;
    }
    .status{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 5px rgba(154,245,199,.1);flex:none}
    .notice-row span{color:var(--muted);font-size:13px}
    .faq-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}
    .faq-lead p{color:var(--muted);margin-top:14px}
    .faq-list{border-top:1px solid var(--line)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-q{
      width:100%;
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:20px;
      padding:20px 0;
      background:none;
      color:var(--text);
      text-align:left;
      font-weight:700;
    }
    .faq-q span:last-child{color:var(--orange);font-size:23px;transition:transform .2s}
    .faq-a{display:none;color:var(--muted);padding:0 35px 20px 0}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
    .cta{
      padding:50px 55px;
      background:var(--orange);
      color:#27151b;
      border-radius:var(--radius);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:25px;
    }
    .cta h2{font-size:32px;line-height:1.25;margin-bottom:8px}
    .cta p{margin:0;color:#694039}
    .cta .btn{background:#27151b;color:var(--text)}
    .cta .btn:hover{background:#3d2630;transform:translateY(-2px)}
    .site-footer{margin-top:72px;padding:52px 0 25px;border-top:1px solid rgba(255,255,255,.08);background:rgba(19,15,26,.65)}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:38px}
    .footer-brand p{color:var(--muted);max-width:300px;margin-top:15px}
    .footer-col{display:flex;flex-direction:column;gap:9px}
    .footer-col h4{font-size:14px;margin:0 0 6px;color:var(--text)}
    .footer-col a{color:var(--muted);font-size:13px;transition:color .2s}
    .footer-col a:hover{color:var(--orange)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.08);margin-top:40px;padding-top:20px;color:#8e8298;font-size:12px}
    @media(max-width:1024px){
      .nav-links a{padding-left:8px;padding-right:8px;font-size:13px}
      .navbar{gap:15px}
      .guide-layout{grid-template-columns:240px 1fr}
      .faq-grid{gap:35px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 34px))}
      .site-header{height:70px}
      .navbar{justify-content:space-between}
      .nav-action{margin-left:auto}
      .nav-action .btn{min-height:40px;padding:0 13px;font-size:13px}
      .menu-toggle{display:block}
      .nav-links{
        display:none;
        position:absolute;
        top:70px;left:0;right:0;
        padding:13px 17px 20px;
        flex-direction:column;
        align-items:stretch;
        margin:0;
        background:var(--bg-deep);
        border-bottom:1px solid var(--line);
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:13px 14px}
      .guide-hero{padding:35px 0 50px}
      .guide-hero:after{font-size:140px;top:20px}
      .guide-layout,.faq-grid,.notice-band{grid-template-columns:1fr}
      .guide-menu{position:static}
      .section{padding:53px 0}
      .section-head{display:block}
      .section-intro{margin-top:13px}
      .feature-card.wide{grid-column:span 1}
      .cta{display:block;padding:35px 28px}
      .cta .btn{margin-top:22px}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
      .footer-brand{grid-column:1/-1}
    }
    @media(max-width:520px){
      h1{font-size:39px}
      .hero-copy{font-size:15px}
      .hero-actions .btn{width:100%}
      .step{grid-template-columns:48px 1fr;gap:14px;padding:21px 17px}
      .step h3{font-size:18px}
      .feature-grid{grid-template-columns:1fr}
      .notice-band{padding:25px 20px}
      .notice-band h2{font-size:26px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:27px}
      .copyright{display:block;line-height:2}
      .copyright span{display:block}
      .logo{font-size:17px}
    }

/* roulang page: category2 */
:root{
      --ink:#17121f;
      --ink-2:#211a2d;
      --bg:#211a2b;
      --bg-deep:#130f1a;
      --panel:#292038;
      --panel-2:#322644;
      --line:#493858;
      --line-soft:rgba(255,255,255,.1);
      --text:#fff9f1;
      --muted:#bdb1c9;
      --orange:#ff765d;
      --orange-2:#ff967d;
      --mint:#9af5c7;
      --mint-deep:#50d79d;
      --yellow:#ffd27c;
      --shadow:0 18px 55px rgba(0,0,0,.28);
      --radius:18px;
      --radius-sm:10px;
      --container:1240px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      background:var(--ink);
      color:var(--text);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
      line-height:1.7;
      font-size:15px;
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.22;
      background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
      background-size:48px 48px;
      mask-image:linear-gradient(to bottom,black,transparent 70%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:auto}
    .site-header{
      height:82px;
      border-bottom:1px solid rgba(255,255,255,.08);
      background:rgba(23,18,31,.94);
      backdrop-filter:blur(12px);
      position:sticky;
      top:0;
      z-index:20;
    }
    .navbar{height:100%;display:flex;align-items:center;gap:32px}
    .logo{font-weight:800;letter-spacing:-.04em;font-size:20px;white-space:nowrap}
    .logo span{color:var(--orange)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{
      color:var(--muted);
      padding:9px 13px;
      border-radius:8px;
      transition:var(--ease);
    }
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}
    .nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{margin-left:14px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:9px;
      min-height:46px;
      padding:0 20px;
      border-radius:9px;
      font-weight:700;
      transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
    }
    .btn-primary{background:var(--orange);color:#21131a;box-shadow:0 9px 24px rgba(255,118,93,.2)}
    .btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}
    .btn-primary:active{transform:translateY(1px);box-shadow:none}
    .btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}
    .btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
    .btn:focus-visible,.nav-links a:focus-visible,.faq-q:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    .btn:disabled{cursor:not-allowed;opacity:.45;filter:grayscale(.4)}
    .menu-toggle{display:none;background:none;color:var(--text);font-size:25px}
    .hero{
      padding:82px 0 72px;
      position:relative;
      border-bottom:1px solid var(--line-soft);
    }
    .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:70px;align-items:center}
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:9px;
      color:var(--mint);
      font-size:13px;
      font-weight:700;
      letter-spacing:.08em;
      margin-bottom:18px;
    }
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--orange)}
    h1,h2,h3,h4,p{margin-top:0}
    .hero h1{
      font-size:clamp(36px,5vw,66px);
      line-height:1.16;
      letter-spacing:-.055em;
      margin-bottom:22px;
    }
    .hero h1 em{color:var(--orange);font-style:normal}
    .hero-copy{color:var(--muted);font-size:17px;max-width:630px;margin-bottom:30px}
    .hero-actions{display:flex;gap:13px;flex-wrap:wrap}
    .hero-note{display:flex;align-items:center;gap:10px;margin-top:27px;color:#9d91aa;font-size:13px}
    .hero-note b{width:8px;height:8px;background:var(--mint-deep);border-radius:50%;box-shadow:0 0 0 5px rgba(80,215,157,.12)}
    .content-visual{
      min-height:390px;
      padding:22px;
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:#241a31;
      box-shadow:var(--shadow);
      position:relative;
      overflow:hidden;
    }
    .content-visual:before{
      content:"";
      position:absolute;
      width:300px;height:300px;
      right:-100px;top:-90px;
      border:1px solid rgba(255,118,93,.3);
      transform:rotate(34deg);
      box-shadow:0 0 0 18px rgba(255,118,93,.04),0 0 0 38px rgba(255,118,93,.03);
    }
    .visual-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;position:relative}
    .visual-top strong{font-size:18px}
    .visual-top span{color:var(--mint);font-size:12px}
    .visual-main{
      min-height:206px;
      padding:28px;
      border-radius:14px;
      background:linear-gradient(135deg,#432d44,#2e233c);
      border:1px solid #654556;
      position:relative;
      overflow:hidden;
    }
    .visual-main:after{content:"DF";position:absolute;right:15px;bottom:-35px;font-size:170px;line-height:1;font-weight:900;color:rgba(255,118,93,.12)}
    .visual-main small{color:var(--mint);position:relative;z-index:1}
    .visual-main h2{font-size:28px;max-width:280px;line-height:1.25;margin:14px 0;position:relative;z-index:1}
    .visual-main p{color:var(--muted);font-size:13px;max-width:280px;position:relative;z-index:1}
    .visual-bars{display:grid;grid-template-columns:1.3fr .7fr;gap:12px;margin-top:13px}
    .visual-bar{height:70px;padding:14px 16px;border:1px solid var(--line);border-radius:11px;background:var(--panel)}
    .visual-bar span{display:block;color:var(--muted);font-size:12px}
    .visual-bar b{color:var(--yellow);font-size:19px}
    .section{padding:76px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}
    .section h2{font-size:clamp(27px,3.5vw,42px);line-height:1.25;letter-spacing:-.04em;margin-bottom:0}
    .section-intro{color:var(--muted);max-width:570px}
    .category-strip{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:13px}
    .category-card{
      min-height:190px;
      padding:27px;
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:var(--radius);
      transition:var(--ease);
      position:relative;
      overflow:hidden;
    }
    .category-card:first-child{background:var(--orange);color:#24151b}
    .category-card:hover{transform:translateY(-4px);border-color:var(--orange);box-shadow:0 14px 32px rgba(0,0,0,.22)}
    .category-card .num{font-size:12px;color:var(--mint);font-weight:700}
    .category-card:first-child .num{color:#64352f}
    .category-card h3{font-size:23px;margin:22px 0 7px}
    .category-card p{font-size:13px;color:var(--muted);max-width:300px}
    .category-card:first-child p{color:#613d3c}
    .category-card .go{position:absolute;right:23px;bottom:20px;color:var(--orange);font-size:22px}
    .category-card:first-child .go{color:#24151b}
    .feature-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .feature-panel,.info-panel{
      border:1px solid var(--line);
      border-radius:var(--radius);
      background:var(--panel);
      overflow:hidden;
    }
    .feature-panel{padding:34px;min-height:330px;background:linear-gradient(135deg,#3b2940,#251c31);position:relative}
    .feature-panel:before{content:"";position:absolute;inset:22px;border:1px solid rgba(154,245,199,.16);transform:skewY(-8deg);pointer-events:none}
    .feature-panel h3,.feature-panel p,.feature-panel a{position:relative;z-index:1}
    .feature-panel h3{font-size:31px;max-width:470px;margin:36px 0 14px}
    .feature-panel p{color:var(--muted);max-width:470px}
    .info-panel{padding:10px 26px}
    .info-row{padding:22px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;align-items:center}
    .info-row:last-child{border-bottom:0}
    .info-row small{color:var(--mint);display:block;margin-bottom:4px}
    .info-row strong{font-size:16px}
    .info-row b{color:var(--orange);font-size:22px}
    .details-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:42px;align-items:start}
    .detail-lead{padding:30px;border-left:3px solid var(--orange);background:rgba(255,118,93,.06)}
    .detail-lead h3{font-size:25px;margin-bottom:14px}
    .detail-lead p{color:var(--muted);margin-bottom:0}
    .detail-list{display:grid;gap:12px}
    .detail-item{display:grid;grid-template-columns:46px 1fr;gap:16px;padding:18px 20px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm)}
    .detail-icon{width:38px;height:38px;display:grid;place-items:center;border-radius:10px;background:rgba(154,245,199,.1);color:var(--mint);font-weight:800}
    .detail-item h4{font-size:17px;margin-bottom:4px}
    .detail-item p{font-size:13px;color:var(--muted);margin-bottom:0}
    .update-band{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
    .update-cell{padding:25px;background:var(--panel)}
    .update-cell small{color:var(--muted);display:block;margin-bottom:7px}
    .update-cell strong{font-size:20px;color:var(--text)}
    .update-cell p{font-size:13px;color:var(--muted);margin:8px 0 0}
    .notice{margin-top:20px;padding:16px 20px;border:1px solid rgba(154,245,199,.3);border-radius:var(--radius-sm);color:var(--muted);background:rgba(154,245,199,.05)}
    .notice b{color:var(--mint);margin-right:8px}
    .cta{
      padding:48px;
      border-radius:var(--radius);
      background:var(--orange);
      color:#26151b;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:30px;
      position:relative;
      overflow:hidden;
    }
    .cta:after{content:"→";position:absolute;right:30px;bottom:-43px;font-size:190px;line-height:1;font-weight:900;color:rgba(255,255,255,.15)}
    .cta h2{font-size:34px;line-height:1.25;margin-bottom:9px}
    .cta p{margin:0;color:#603a3b;max-width:650px}
    .cta .btn{background:#271620;color:var(--text);position:relative;z-index:1}
    .site-footer{padding:58px 0 25px;border-top:1px solid rgba(255,255,255,.08);background:var(--bg-deep)}
    .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:38px}
    .footer-brand p{color:var(--muted);max-width:300px;font-size:13px;margin-top:16px}
    .footer-col{display:flex;flex-direction:column;gap:9px}
    .footer-col h4{font-size:14px;margin-bottom:9px}
    .footer-col a{color:var(--muted);font-size:13px;transition:var(--ease)}
    .footer-col a:hover{color:var(--orange);padding-left:3px}
    .copyright{display:flex;justify-content:space-between;gap:20px;margin-top:45px;padding-top:18px;border-top:1px solid var(--line);color:#897b93;font-size:12px}
    @media(max-width:1024px){
      .nav-links a{padding:8px 8px;font-size:13px}
      .navbar{gap:16px}
      .hero-grid{gap:35px}
      .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
      .footer-col:last-child{grid-column:2}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:70px}
      .navbar{justify-content:space-between}
      .nav-action{margin-left:auto}
      .nav-action .btn{min-height:40px;padding:0 13px;font-size:13px}
      .menu-toggle{display:block}
      .nav-links{
        position:absolute;
        top:70px;left:16px;right:16px;
        display:none;
        flex-direction:column;
        align-items:stretch;
        gap:4px;
        padding:12px;
        background:var(--panel);
        border:1px solid var(--line);
        border-radius:var(--radius-sm);
        box-shadow:var(--shadow);
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px}
      .hero{padding:58px 0 50px}
      .hero-grid,.feature-layout,.details-grid{grid-template-columns:1fr}
      .content-visual{min-height:320px}
      .section{padding:58px 0}
      .section-head{display:block}
      .section-intro{margin-top:13px}
      .category-strip{grid-template-columns:1fr 1fr}
      .category-card:first-child{grid-column:span 2}
      .cta{display:block;padding:34px 26px}
      .cta .btn{margin-top:22px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .footer-col:last-child{grid-column:auto}
      .copyright{display:block}
      .copyright span{display:block;margin-top:5px}
    }
    @media(max-width:520px){
      .logo{font-size:16px}
      .nav-action{display:none}
      .hero h1{font-size:38px}
      .hero-copy{font-size:15px}
      .content-visual{padding:14px;min-height:300px}
      .visual-main{padding:22px;min-height:170px}
      .visual-main h2{font-size:23px}
      .category-strip{grid-template-columns:1fr}
      .category-card:first-child{grid-column:auto}
      .category-card{min-height:155px}
      .feature-panel{padding:24px;min-height:280px}
      .feature-panel h3{font-size:25px;margin-top:26px}
      .info-panel{padding:8px 18px}
      .update-band{grid-template-columns:1fr}
      .update-cell{padding:18px 20px}
      .cta h2{font-size:27px}
      .footer-grid{grid-template-columns:1fr}
      .footer-col:last-child{grid-column:auto}
    }

/* roulang page: category5 */
:root{
      --ink:#17121f;
      --ink-2:#211a2d;
      --bg:#211a2b;
      --bg-deep:#130f1a;
      --panel:#292038;
      --panel-2:#322644;
      --line:#493858;
      --line-soft:rgba(255,255,255,.1);
      --text:#fff9f1;
      --muted:#bdb1c9;
      --orange:#ff765d;
      --orange-2:#ff967d;
      --mint:#9af5c7;
      --mint-deep:#50d79d;
      --yellow:#ffd27c;
      --shadow:0 18px 55px rgba(0,0,0,.28);
      --radius:18px;
      --radius-sm:10px;
      --container:1240px;
      --ease:all .25s ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      background:var(--ink);
      color:var(--text);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
      font-size:15px;
      line-height:1.7;
      overflow-x:hidden;
    }
    body:before{
      content:"";position:fixed;inset:0;pointer-events:none;opacity:.2;z-index:-1;
      background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
      background-size:48px 48px;
      mask-image:linear-gradient(to bottom,black,transparent 75%);
    }
    a{color:inherit;text-decoration:none}
    button,input{font:inherit}
    button{border:0;cursor:pointer}
    img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{
      height:82px;position:sticky;top:0;z-index:20;
      background:rgba(23,18,31,.94);border-bottom:1px solid rgba(255,255,255,.08);
      backdrop-filter:blur(12px)
    }
    .navbar{height:100%;display:flex;align-items:center;gap:28px}
    .logo{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .logo span{color:var(--orange)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{color:var(--muted);padding:9px 13px;border-radius:8px;transition:var(--ease)}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}
    .nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{margin-left:12px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:0 20px;border-radius:9px;font-weight:700;
      transition:var(--ease)
    }
    .btn-primary{background:var(--orange);color:#25151c;box-shadow:0 9px 24px rgba(255,118,93,.2)}
    .btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}
    .btn-primary:active{transform:translateY(1px);box-shadow:none}
    .btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}
    .btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
    .btn:focus-visible,.nav-links a:focus-visible,.faq-q:focus-visible,.filter-btn:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    .menu-toggle{display:none;background:transparent;color:var(--text);font-size:25px}
    .page-hero{padding:78px 0 64px;position:relative;overflow:hidden}
    .page-hero:after{
      content:"?";position:absolute;right:7%;top:-35px;color:rgba(255,118,93,.08);
      font-size:260px;font-weight:900;line-height:1;pointer-events:none
    }
    .hero-inner{display:grid;grid-template-columns:1fr 360px;gap:60px;align-items:end;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-size:13px;font-weight:700;letter-spacing:.08em;margin-bottom:17px}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--orange)}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,64px);line-height:1.16;letter-spacing:-.055em;margin-bottom:20px}
    h1 em{color:var(--orange);font-style:normal}
    .hero-copy{max-width:690px;color:var(--muted);font-size:17px;margin-bottom:28px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .hero-index{
      padding:24px;background:var(--panel);border:1px solid var(--line);
      border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-index .index-title{font-size:13px;color:var(--mint);margin-bottom:15px;font-weight:700}
    .hero-index a{display:flex;justify-content:space-between;align-items:center;padding:11px 0;border-bottom:1px solid var(--line);color:var(--muted);transition:var(--ease)}
    .hero-index a:last-child{border-bottom:0}
    .hero-index a:hover{color:var(--orange);padding-left:5px}
    .hero-index b{color:var(--orange);font-size:13px}
    .section{padding:72px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:28px}
    h2{font-size:clamp(28px,3.5vw,42px);line-height:1.25;letter-spacing:-.04em;margin-bottom:0}
    .section-intro{max-width:550px;color:var(--muted)}
    .filter-bar{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:25px}
    .filter-btn{padding:8px 15px;color:var(--muted);background:var(--panel);border:1px solid var(--line);border-radius:100px;transition:var(--ease)}
    .filter-btn:hover,.filter-btn.active{color:#24151c;background:var(--orange);border-color:var(--orange)}
    .faq-layout{display:grid;grid-template-columns:300px 1fr;gap:70px;align-items:start}
    .topic-card{padding:27px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);position:sticky;top:110px}
    .topic-card h3{font-size:21px;margin-bottom:12px}
    .topic-card p{color:var(--muted);font-size:14px;margin-bottom:22px}
    .topic-list{list-style:none;padding:0;margin:0}
    .topic-list li{border-top:1px solid var(--line);padding:12px 0;color:var(--muted)}
    .topic-list li strong{color:var(--orange);margin-right:8px}
    .faq-list{border-top:1px solid var(--line)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-q{
      width:100%;display:flex;justify-content:space-between;align-items:center;gap:20px;
      padding:22px 4px;background:transparent;color:var(--text);text-align:left;font-weight:700;font-size:17px
    }
    .faq-q:hover{color:var(--orange)}
    .faq-q .plus{font-size:24px;color:var(--orange);font-weight:400;transition:transform .25s}
    .faq-item.open .plus{transform:rotate(45deg)}
    .faq-a{display:none;color:var(--muted);padding:0 48px 22px 4px;max-width:760px}
    .faq-item.open .faq-a{display:block}
    .notice-strip{display:flex;align-items:center;gap:13px;color:var(--muted);padding:15px 18px;background:rgba(154,245,199,.06);border:1px solid rgba(154,245,199,.2);border-radius:var(--radius-sm);margin-bottom:28px}
    .notice-strip b{color:var(--mint)}
    .help-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
    .help-card{padding:30px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:var(--ease)}
    .help-card:hover{border-color:var(--orange);transform:translateY(-3px)}
    .help-card.accent{background:linear-gradient(135deg,#3b2940,#292038);border-color:#704b55}
    .help-card h3{font-size:22px;margin-bottom:9px}
    .help-card p{color:var(--muted);margin-bottom:20px}
    .help-links{display:flex;gap:10px;flex-wrap:wrap}
    .site-footer{padding:55px 0 22px;background:var(--bg-deep);border-top:1px solid rgba(255,255,255,.08)}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer-brand p{color:var(--muted);max-width:310px;margin-top:15px;font-size:14px}
    .footer-col h4{font-size:14px;margin-bottom:14px;color:var(--mint)}
    .footer-col a{display:block;color:var(--muted);font-size:14px;margin:8px 0;transition:var(--ease)}
    .footer-col a:hover{color:var(--orange);padding-left:4px}
    .copyright{display:flex;justify-content:space-between;gap:20px;margin-top:45px;padding-top:18px;border-top:1px solid var(--line);color:#887b91;font-size:12px}
    @media(max-width:1024px){
      .nav-links a{padding:8px 8px;font-size:14px}
      .navbar{gap:14px}
      .hero-inner{grid-template-columns:1fr 310px;gap:35px}
      .faq-layout{gap:35px}
    }
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}
      .site-header{height:70px}
      .menu-toggle{display:block;margin-left:auto}
      .nav-action{margin-left:8px}
      .nav-action .btn{min-height:40px;padding:0 13px;font-size:13px}
      .nav-links{
        display:none;position:absolute;top:70px;left:0;right:0;margin:0;padding:12px 16px;
        background:var(--ink-2);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch
      }
      .nav-links.show{display:flex}
      .nav-links a{padding:12px 14px}
      .page-hero{padding:58px 0 45px}
      .hero-inner,.faq-layout,.help-grid{grid-template-columns:1fr}
      .hero-index{position:relative;top:auto}
      .topic-card{position:static}
      .section{padding:52px 0}
      .section-head{display:block}
      .section-intro{margin-top:12px}
      .footer-grid{grid-template-columns:1fr 1fr}
      .copyright{display:block}
      .copyright span{display:block;margin-top:7px}
    }
    @media(max-width:520px){
      h1{font-size:38px}
      .hero-copy{font-size:15px}
      .hero-actions .btn{width:100%}
      .faq-q{font-size:15px;padding:18px 0}
      .faq-a{padding-right:15px;font-size:14px}
      .footer-grid{grid-template-columns:1fr;gap:23px}
      .notice-strip{align-items:flex-start;font-size:13px}
    }

/* roulang page: category4 */
:root{
      --ink:#17121f;--ink-2:#211a2d;--panel:#292038;--panel-2:#322644;
      --line:#493858;--line-soft:rgba(255,255,255,.1);--text:#fff9f1;
      --muted:#bdb1c9;--orange:#ff765d;--orange-2:#ff967d;--mint:#9af5c7;
      --mint-deep:#50d79d;--yellow:#ffd27c;--shadow:0 18px 55px rgba(0,0,0,.28);
      --radius:18px;--radius-sm:10px;--container:1240px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--ink);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
    body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.2;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(to bottom,black,transparent 70%);z-index:-1}
    a{color:inherit;text-decoration:none} img{max-width:100%;display:block} button{font:inherit;border:0;cursor:pointer}
    .container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
    .site-header{height:82px;position:sticky;top:0;z-index:20;background:rgba(23,18,31,.94);border-bottom:1px solid rgba(255,255,255,.08);backdrop-filter:blur(12px)}
    .navbar{height:100%;display:flex;align-items:center;gap:28px}
    .logo{font-size:20px;font-weight:800;letter-spacing:-.04em;white-space:nowrap}
    .logo span{color:var(--orange)}
    .nav-links{display:flex;align-items:center;gap:5px;margin-left:auto}
    .nav-links a{padding:9px 13px;border-radius:8px;color:var(--muted);transition:.22s ease}
    .nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,118,93,.12)}
    .nav-links a.active{box-shadow:inset 0 -2px var(--orange)}
    .nav-action{margin-left:10px}
    .menu-toggle{display:none;background:none;color:var(--text);font-size:25px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 20px;border-radius:9px;font-weight:700;transition:.2s ease}
    .btn-primary{background:var(--orange);color:#25151c;box-shadow:0 9px 24px rgba(255,118,93,.2)}
    .btn-primary:hover{background:var(--orange-2);transform:translateY(-2px);box-shadow:0 13px 30px rgba(255,118,93,.3)}
    .btn-primary:active{transform:translateY(1px);box-shadow:none}
    .btn-secondary{border:1px solid #70556f;color:var(--text);background:transparent}
    .btn-secondary:hover{border-color:var(--mint);color:var(--mint);background:rgba(154,245,199,.06)}
    .btn:focus-visible,.nav-links a:focus-visible,.faq-q:focus-visible{outline:3px solid var(--mint);outline-offset:3px}
    .eyebrow{display:inline-flex;align-items:center;gap:9px;color:var(--mint);font-size:13px;font-weight:700;letter-spacing:.08em}
    .eyebrow:before{content:"";width:25px;height:2px;background:var(--orange)}
    .page-hero{padding:76px 0 56px}
    .hero-layout{display:grid;grid-template-columns:1fr .85fr;gap:72px;align-items:center}
    h1,h2,h3,h4,p{margin-top:0}
    h1{font-size:clamp(36px,5vw,64px);line-height:1.16;letter-spacing:-.055em;margin:18px 0}
    h1 em{font-style:normal;color:var(--orange)}
    .lead{max-width:650px;color:var(--muted);font-size:17px;margin-bottom:28px}
    .hero-actions{display:flex;gap:13px;flex-wrap:wrap}
    .hero-meta{display:flex;gap:24px;flex-wrap:wrap;margin-top:28px;color:var(--muted);font-size:13px}
    .hero-meta b{display:block;color:var(--mint);font-size:18px;line-height:1.3}
    .device-stage{min-height:380px;position:relative;padding:26px;border:1px solid var(--line);border-radius:28px;background:#241a31;box-shadow:var(--shadow);overflow:hidden}
    .device-stage:before{content:"";position:absolute;width:300px;height:300px;right:-70px;top:-80px;border:1px solid rgba(154,245,199,.25);transform:rotate(28deg)}
    .device-stage:after{content:"";position:absolute;width:240px;height:240px;left:-100px;bottom:-130px;border:1px solid rgba(255,118,93,.3);transform:rotate(28deg)}
    .device{position:relative;z-index:1;width:215px;height:335px;margin:5px auto 0;border:7px solid #100d16;border-radius:28px;background:var(--panel-2);box-shadow:0 18px 35px rgba(0,0,0,.35);padding:16px 12px}
    .device-notch{width:70px;height:7px;border-radius:10px;background:#100d16;margin:0 auto 18px}
    .screen-top{display:flex;justify-content:space-between;color:var(--mint);font-size:10px;margin-bottom:15px}
    .screen-block{height:62px;border-radius:10px;background:var(--orange);padding:12px;color:#29171c;font-size:12px;font-weight:800}
    .screen-list{margin-top:12px;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}
    .screen-list div{padding:10px 3px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between}
    .screen-list i{color:var(--mint);font-style:normal}
    .floating-note{position:absolute;right:25px;bottom:30px;z-index:2;padding:12px 15px;border:1px solid rgba(154,245,199,.35);border-radius:10px;background:#30233c;color:var(--mint);font-size:12px}
    .section{padding:72px 0}
    .section.alt{background:rgba(33,26,45,.68);border-top:1px solid rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.04)}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:30px}
    h2{font-size:clamp(27px,3.5vw,42px);line-height:1.25;letter-spacing:-.04em;margin-bottom:10px}
    .section-intro{color:var(--muted);max-width:570px}
    .download-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
    .download-card,.info-panel,.step-card,.help-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:0 12px 30px rgba(0,0,0,.12)}
    .download-card{padding:32px;min-height:270px;position:relative;overflow:hidden}
    .download-card.primary{background:linear-gradient(135deg,#3a263b,#292038)}
    .download-card.primary:after{content:"DF";position:absolute;right:18px;bottom:-32px;font-size:170px;font-weight:900;color:rgba(255,118,93,.1);line-height:1}
    .download-card h3{font-size:25px;position:relative;z-index:1}
    .download-card p{color:var(--muted);max-width:480px;position:relative;z-index:1}
    .download-card .btn{position:relative;z-index:1}
    .download-options{display:grid;gap:12px}
    .option-row{display:flex;align-items:center;gap:15px;padding:18px;border:1px solid var(--line);border-radius:12px;background:var(--panel-2);transition:.2s}
    .option-row:hover{border-color:var(--mint);transform:translateX(4px)}
    .option-icon{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;background:rgba(154,245,199,.1);color:var(--mint);font-size:20px}
    .option-row strong{display:block}.option-row small{color:var(--muted)}
    .badge{display:inline-flex;padding:4px 10px;border-radius:99px;border:1px solid rgba(154,245,199,.35);color:var(--mint);font-size:12px;margin-bottom:14px}
    .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .step-card{padding:25px;transition:.2s}
    .step-card:hover{border-color:var(--orange);transform:translateY(-3px)}
    .step-number{color:var(--orange);font-size:28px;font-weight:800;line-height:1;margin-bottom:18px}
    .step-card h3{font-size:18px}.step-card p{color:var(--muted);font-size:14px;margin:0}
    .two-col{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}
    .info-panel{padding:27px}
    .check-list{list-style:none;padding:0;margin:0}
    .check-list li{padding:14px 0;border-bottom:1px solid var(--line);display:flex;gap:12px;color:var(--muted)}
    .check-list li:last-child{border-bottom:0}.check-list b{color:var(--mint);font-weight:700}
    .faq-list{border-top:1px solid var(--line)}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-q{width:100%;padding:20px 0;background:none;color:var(--text);text-align:left;display:flex;justify-content:space-between;gap:20px;font-weight:700}
    .faq-q span:last-child{color:var(--orange);font-size:22px;line-height:1}
    .faq-a{color:var(--muted);padding:0 42px 20px 0;max-width:800px}
    .cta{padding:42px;border:1px solid rgba(255,118,93,.38);border-radius:var(--radius);background:#30213a;display:flex;align-items:center;justify-content:space-between;gap:25px}
    .cta h2{margin:0 0 8px}.cta p{margin:0;color:var(--muted)}
    .site-footer{padding:54px 0 22px;border-top:1px solid rgba(255,255,255,.08);background:#130f1a}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:35px}
    .footer-brand p{color:var(--muted);max-width:330px;margin-top:15px}
    .footer-col h4{font-size:14px;color:var(--yellow);margin-bottom:14px}
    .footer-col a{display:block;color:var(--muted);font-size:14px;margin:8px 0;transition:.2s}
    .footer-col a:hover{color:var(--orange)}
    .copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);margin-top:40px;padding-top:18px;color:#897c96;font-size:12px}
    @media(max-width:1024px){.hero-layout{gap:35px}.nav-links a{padding:8px 8px}.navbar{gap:12px}.download-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}}
    @media(max-width:768px){
      .container{width:min(var(--container),calc(100% - 32px))}.site-header{height:70px}.navbar{position:relative}
      .nav-action{margin-left:auto}.nav-action .btn{min-height:40px;padding:0 13px;font-size:13px}.menu-toggle{display:block}
      .nav-links{display:none;position:absolute;top:69px;left:-16px;right:-16px;padding:14px 16px;background:#1b1524;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}.nav-links a{padding:12px 14px}.logo{font-size:17px}
      .page-hero{padding:52px 0 35px}.hero-layout,.two-col{grid-template-columns:1fr}.device-stage{min-height:350px}.section{padding:52px 0}
      .steps{grid-template-columns:1fr}.section-head{display:block}.section-head .section-intro{margin-top:12px}.cta{display:block;padding:28px}.cta .btn{margin-top:20px;width:100%}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-brand{grid-column:1/-1}
    }
    @media(max-width:520px){
      h1{font-size:38px}.lead{font-size:15px}.hero-actions .btn{width:100%}.hero-meta{gap:15px}.device-stage{padding:17px;min-height:330px}
      .device{transform:scale(.88);transform-origin:top center;margin-bottom:-40px}.floating-note{right:14px;bottom:20px}.download-card{padding:24px}
      .copyright{display:block}.copyright span{display:block;margin-top:5px}
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}