/* roulang page: index */
:root{
  --ink-900:#050b14;
  --ink-800:#070f1e;
  --ink-700:#0a1628;
  --panel:rgba(255,255,255,.045);
  --panel-strong:rgba(255,255,255,.075);
  --line:rgba(120,160,255,.16);
  --line-soft:rgba(120,160,255,.10);
  --text:#e8eefc;
  --muted:#9aabc8;
  --dim:#7d8fb0;
  --brand:#2f7bff;
  --brand-2:#22d3ee;
  --radius:16px;
  --radius-lg:22px;
  --shadow-glow:0 10px 28px rgba(47,123,255,.32);
  --shadow-card:0 18px 44px rgba(3,9,20,.55);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(1100px 620px at 12% -10%,rgba(47,123,255,.20),transparent 62%),
    radial-gradient(900px 520px at 92% 4%,rgba(34,211,238,.13),transparent 58%),
    var(--ink-900);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700}
p{margin:0}
button{font:inherit}
:focus-visible{outline:2px solid var(--brand-2);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.glass{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,14,28,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:70px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;padding:8px 0}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  font-size:18px;font-weight:700;color:#03111f;
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  box-shadow:0 8px 22px rgba(47,123,255,.38);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;letter-spacing:.5px}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.6px}
.nav-toggle{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.nav-burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;margin-left:auto;
}
.nav-burger span{display:block;height:2px;width:18px;margin:0 auto;border-radius:2px;background:#bcd0f0}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.site-nav a{
  display:block;padding:9px 15px;border-radius:11px;
  font-size:15px;color:var(--muted);
  transition:background .22s ease,color .22s ease,box-shadow .22s ease;
}
.site-nav a:hover{color:#fff;background:rgba(47,123,255,.14)}
.site-nav a.is-active{color:#fff;background:rgba(47,123,255,.18);box-shadow:inset 0 0 0 1px rgba(47,123,255,.38)}
.nav-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  color:#04121f;font-weight:600;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(47,123,255,.48)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(47,123,255,.36)}
.btn-ghost{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--text)}
.btn-ghost:hover{background:rgba(47,123,255,.15);border-color:rgba(47,123,255,.45);transform:translateY(-2px)}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:10px}

/* hero */
.hero{position:relative;padding:66px 0 76px;overflow:hidden}
.hero::after{
  content:"";position:absolute;inset:auto -10% -40% auto;width:560px;height:560px;
  background:radial-gradient(circle,rgba(34,211,238,.14),transparent 65%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:52px;align-items:start}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.4px;
  color:#a9c8ff;background:rgba(47,123,255,.14);border:1px solid rgba(47,123,255,.32);
}
.hero h1{font-size:40px;line-height:1.28;letter-spacing:-.4px;margin:20px 0 20px}
.hero-lead{font-size:16px;color:#b6c6de;line-height:1.85}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 32px}
.roadmap{border-top:1px dashed var(--line-soft);padding-top:22px}
.roadmap-title{font-size:13px;color:var(--dim);letter-spacing:1.2px;margin-bottom:14px}
.roadmap-track{display:flex;flex-wrap:wrap;gap:10px}
.roadmap-step{
  display:flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;
  font-size:13.5px;color:#c4d3ea;background:rgba(255,255,255,.04);border:1px solid var(--line);
  transition:border-color .22s ease,background .22s ease;
}
.roadmap-step:hover{border-color:rgba(34,211,238,.42);background:rgba(34,211,238,.08)}
.roadmap-step i{
  width:19px;height:19px;border-radius:50%;display:grid;place-items:center;
  font-style:normal;font-size:11px;color:#7ce7f7;background:rgba(34,211,238,.16);flex:0 0 auto;
}
.roadmap-note{margin-top:16px;font-size:13.5px;color:var(--muted)}
.roadmap-note a{color:#7cb2ff;border-bottom:1px dashed rgba(124,178,255,.5);transition:color .2s ease}
.roadmap-note a:hover{color:#a9c8ff}

.hero-panel{padding:26px 26px 22px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.panel-head h2{font-size:16px;letter-spacing:.3px}
.panel-badge{
  font-size:11px;color:#7ce7f7;padding:3px 10px;border-radius:999px;
  background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.3);white-space:nowrap;
}
.param-list li{display:flex;flex-direction:column;gap:3px;padding:12px 0;border-bottom:1px dashed var(--line-soft)}
.param-list li:last-child{border-bottom:0}
.param-name{font-size:14.5px;font-weight:600;color:#e2ebfa}
.param-desc{font-size:13px;color:var(--muted);line-height:1.65}
.panel-foot{margin-top:14px;padding-top:14px;border-top:1px solid var(--line-soft);font-size:12.5px;color:var(--dim)}

/* sections */
.section{padding:74px 0;position:relative}
.section--alt{background:rgba(255,255,255,.018);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{max-width:780px;margin-bottom:38px}
.section-head h2{font-size:30px;letter-spacing:-.2px;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.section-head .eyebrow{margin-bottom:16px}

/* download */
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{
  display:flex;flex-direction:column;gap:12px;padding:28px 24px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.45);background:var(--panel-strong);box-shadow:0 22px 50px rgba(3,9,20,.65)}
.dl-icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  font-size:13px;font-weight:700;color:#c8e8ff;letter-spacing:.5px;
  background:linear-gradient(135deg,rgba(47,123,255,.38),rgba(34,211,238,.34));
  border:1px solid rgba(120,200,255,.3);
}
.dl-card h3{font-size:18px}
.dl-card p{font-size:14px;color:var(--muted);flex:1 1 auto;line-height:1.75}
.dl-card .btn{width:100%;margin-top:6px}
.dl-note{margin-top:20px;font-size:13px;color:var(--dim);line-height:1.8}

/* entry matrix */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.entry-card{
  display:flex;flex-direction:column;gap:8px;min-width:0;
  padding:24px 22px;border-radius:var(--radius);background:var(--panel);
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.entry-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.4);background:rgba(34,211,238,.07)}
.entry-card h3{font-size:17px}
.entry-card p{font-size:13.8px;color:var(--muted);line-height:1.72}
.entry-arrow{font-size:13px;color:#7cb2ff;margin-top:4px}

/* feature */
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.feature-card{
  min-width:0;padding:24px 20px;border-radius:var(--radius);background:var(--panel);
  border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease;
}
.feature-card:hover{transform:translateY(-3px);border-color:rgba(47,123,255,.45)}
.feature-card h3{font-size:16.5px;margin-bottom:8px}
.feature-card p{font-size:13.8px;color:var(--muted);line-height:1.72}
.feature-num{
  display:inline-block;font-size:12px;color:#7ce7f7;letter-spacing:1px;
  padding:3px 10px;border-radius:999px;background:rgba(34,211,238,.1);
  border:1px solid rgba(34,211,238,.24);margin-bottom:12px;
}

/* scenes */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.scene-card{
  min-width:0;padding:26px 24px;border-radius:var(--radius-lg);
  background:linear-gradient(150deg,rgba(47,123,255,.10),rgba(255,255,255,.03));
  border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease;
}
.scene-card:hover{border-color:rgba(47,123,255,.45);transform:translateY(-3px)}
.scene-card h3{font-size:17.5px;margin-bottom:10px}
.scene-card p{font-size:14.2px;color:var(--muted);line-height:1.8}
.scene-tag{
  display:inline-block;font-size:12px;color:#a9c8ff;padding:2px 10px;border-radius:999px;
  background:rgba(47,123,255,.14);border:1px solid rgba(47,123,255,.28);margin-bottom:12px;
}

/* steps */
.step-list{display:grid;gap:0;margin-top:8px}
.step-item{position:relative;padding:0 0 28px 66px;min-width:0}
.step-item:last-child{padding-bottom:0}
.step-item::before{
  content:attr(data-step);position:absolute;left:0;top:0;
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#9cc6ff;
  background:rgba(47,123,255,.16);border:1px solid rgba(47,123,255,.42);
}
.step-item::after{
  content:"";position:absolute;left:20px;top:46px;bottom:8px;width:2px;
  background:linear-gradient(to bottom,rgba(47,123,255,.42),rgba(47,123,255,0));
}
.step-item:last-child::after{display:none}
.step-item h3{font-size:17px;margin-bottom:6px}
.step-item p{font-size:14.4px;color:var(--muted);line-height:1.78}

/* split */
.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:44px;align-items:start}
.split h2{font-size:28px;margin-bottom:16px}
.split p.body{font-size:15.2px;color:var(--muted);line-height:1.9;margin-bottom:14px}
.example-box{padding:26px;border-radius:var(--radius-lg);background:rgba(34,211,238,.06);border:1px solid rgba(34,211,238,.24)}
.example-box h3{font-size:15.5px;color:#9be9f6;margin-bottom:14px;letter-spacing:.4px}
.example-box p{font-size:14px;color:#b9c8de;line-height:1.8;margin-bottom:10px}
.example-box p:last-child{margin-bottom:0}
.calc-row{
  display:flex;justify-content:space-between;gap:14px;font-size:13.8px;
  padding:10px 0;border-bottom:1px dashed rgba(34,211,238,.22);color:#cfe4f4;
}
.calc-row:last-of-type{border-bottom:0}
.calc-row span:last-child{color:#8ee6f7;font-weight:600;white-space:nowrap}

/* rule list */
.rule-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.rule-item{
  min-width:0;padding:22px;border-radius:var(--radius);background:var(--panel);
  border:1px solid var(--line);border-left:3px solid rgba(47,123,255,.55);
}
.rule-item h3{font-size:16px;margin-bottom:8px}
.rule-item p{font-size:14px;color:var(--muted);line-height:1.78}

/* news */
.news-layout{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(0,.9fr);gap:32px;align-items:start}
.news-main{display:grid;gap:16px;min-width:0}
.news-card{
  min-width:0;padding:22px 24px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:border-color .25s ease,transform .25s ease,background .25s ease;
}
.news-card:hover{border-color:rgba(47,123,255,.45);transform:translateY(-2px);background:var(--panel-strong)}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:8px;font-size:12.5px;color:var(--dim)}
.tag{
  display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;
  color:#a9c8ff;background:rgba(47,123,255,.14);border:1px solid rgba(47,123,255,.28);
}
.news-card h3{font-size:17.5px;line-height:1.55;margin-bottom:8px}
.news-card h3 a{transition:color .2s ease}
.news-card h3 a:hover{color:#8fc0ff}
.news-card p{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:10px}
.link-more{font-size:13.5px;color:#7cb2ff;transition:color .2s ease}
.link-more:hover{color:#a9c8ff}
.news-side{padding:24px;border-radius:var(--radius-lg);background:var(--panel);border:1px solid var(--line);min-width:0}
.side-title{font-size:15.5px;margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line-soft)}
.news-side-list li{padding:12px 0;border-bottom:1px dashed var(--line-soft);min-width:0}
.news-side-list li:last-child{border-bottom:0;padding-bottom:0}
.news-side-list a{display:block;font-size:14.2px;line-height:1.6;color:#dbe6f7;transition:color .2s ease}
.news-side-list a:hover{color:#8fc0ff}
.news-side-list span{display:block;font-size:12px;color:var(--dim);margin-top:4px}
.empty-note{font-size:14px;color:var(--dim);padding:14px 0}

/* article grid */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card{
  display:flex;flex-direction:column;gap:10px;min-width:0;
  padding:22px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.post-card:hover{transform:translateY(-3px);border-color:rgba(34,211,238,.4);background:rgba(34,211,238,.06)}
.post-card h3{font-size:16.5px;line-height:1.55}
.post-card h3 a{transition:color .2s ease}
.post-card h3 a:hover{color:#8fc0ff}
.post-card p{font-size:13.6px;color:var(--muted);line-height:1.72;flex:1 1 auto}

/* category highlight */
.cat-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:40px;align-items:center}
.cat-card{
  display:block;padding:30px 28px;border-radius:var(--radius-lg);
  background:linear-gradient(150deg,rgba(47,123,255,.18),rgba(34,211,238,.08));
  border:1px solid rgba(47,123,255,.35);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.cat-card:hover{transform:translateY(-4px);box-shadow:0 24px 54px rgba(47,123,255,.26);border-color:rgba(34,211,238,.5)}
.cat-card h3{font-size:20px;margin-bottom:10px}
.cat-card p{font-size:14.2px;color:#c0d0e8;line-height:1.8;margin-bottom:14px}
.cat-enter{font-size:13.5px;color:#9be9f6}
.topic-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.topic-list a{
  display:block;padding:14px 16px;border-radius:12px;font-size:14px;
  background:rgba(255,255,255,.04);border:1px solid var(--line);color:#cddcf0;
  transition:border-color .22s ease,background .22s ease,color .22s ease;
}
.topic-list a:hover{border-color:rgba(47,123,255,.45);background:rgba(47,123,255,.12);color:#fff}

/* changelog */
.changelog{position:relative;padding-left:26px;border-left:2px solid rgba(47,123,255,.24);margin-left:6px}
.changelog-item{position:relative;padding-bottom:28px}
.changelog-item:last-child{padding-bottom:0}
.changelog-item::before{
  content:"";position:absolute;left:-33px;top:9px;width:12px;height:12px;border-radius:50%;
  background:#2f7bff;box-shadow:0 0 0 4px rgba(47,123,255,.18);
}
.changelog-item h3{font-size:16.5px;margin-bottom:6px}
.changelog-item p{font-size:14.2px;color:var(--muted);line-height:1.78}

/* multi device */
.device-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.device-card{
  min-width:0;padding:24px 22px;border-radius:var(--radius);background:var(--panel);
  border:1px solid var(--line);transition:border-color .25s ease,transform .25s ease;
}
.device-card:hover{border-color:rgba(47,123,255,.45);transform:translateY(-3px)}
.device-card h3{font-size:16.5px;margin-bottom:8px}
.device-card p{font-size:13.8px;color:var(--muted);line-height:1.75}

/* faq */
.faq-list{display:grid;gap:14px;max-width:920px}
.faq-item{
  border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.032);
  padding:0 22px;transition:border-color .22s ease,background .22s ease;
}
.faq-item:hover{border-color:rgba(47,123,255,.4)}
.faq-item[open]{background:rgba(47,123,255,.08);border-color:rgba(47,123,255,.4)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:16px;font-weight:600;cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:#7cb2ff;font-weight:400;flex:0 0 auto}
.faq-item[open] summary::after{content:"−"}
.faq-item p{font-size:14.4px;color:var(--muted);line-height:1.85;padding-bottom:18px;margin:0}

/* cta */
.cta-band{
  padding:56px 40px;border-radius:26px;text-align:center;
  background:
    radial-gradient(600px 260px at 50% 0%,rgba(47,123,255,.28),transparent 70%),
    rgba(255,255,255,.045);
  border:1px solid rgba(47,123,255,.34);
  box-shadow:0 24px 60px rgba(3,9,20,.6);
}
.cta-band h2{font-size:28px;margin-bottom:14px}
.cta-band p{max-width:720px;margin:0 auto 26px;font-size:15px;color:#b6c6de;line-height:1.85}
.cta-band .btn{min-width:200px}

/* footer */
.site-footer{
  margin-top:20px;padding:56px 0 26px;
  background:rgba(4,10,20,.92);
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr));gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-brand strong{font-size:16.5px}
.footer-grid p{font-size:13.8px;color:var(--muted);line-height:1.85;max-width:440px}
.footer-col h3{font-size:14.5px;margin-bottom:14px;color:#dbe6f7;letter-spacing:.4px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13.8px;color:var(--muted);transition:color .2s ease}
.footer-col a:hover{color:#8fc0ff}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:flex-start;gap:18px;flex-wrap:wrap;
  margin-top:34px;padding-top:20px;border-top:1px solid var(--line-soft);
  font-size:12.8px;color:var(--dim);line-height:1.8;
}
.risk-note{
  margin-top:22px;padding:16px 18px;border-radius:12px;font-size:12.8px;color:#93a5c0;
  background:rgba(255,255,255,.03);border:1px solid var(--line-soft);line-height:1.85;
}

/* responsive */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:34px}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .split{grid-template-columns:1fr;gap:30px}
  .news-layout{grid-template-columns:1fr;gap:24px}
  .cat-wrap{grid-template-columns:1fr;gap:26px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .entry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .device-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .nav-burger{display:flex}
  .site-nav{display:none;order:6;flex-basis:100%;margin-left:0;padding-bottom:14px}
  .nav-toggle:checked ~ .site-nav{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:4px}
  .site-nav a{padding:12px 14px;font-size:15px}
  .nav-tools{margin-left:10px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  .hero{padding:44px 0 56px}
  .hero h1{font-size:29px;line-height:1.34}
  .hero-lead{font-size:15.2px}
  .section-head h2{font-size:24px}
  .split h2{font-size:23px}
  .download-grid,.entry-grid,.feature-grid,.scene-grid,.rule-grid,.post-grid,.device-grid,.topic-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .cta-band{padding:40px 22px;border-radius:20px}
  .cta-band h2{font-size:23px}
  .btn{width:100%}
  .nav-tools .btn{width:auto}
  .hero-actions{gap:12px}
  .news-card,.news-side,.feature-card,.dl-card,.cat-card,.post-card{padding:20px}
  .step-item{padding-left:56px}
  .step-item::before{width:36px;height:36px;font-size:13px}
  .step-item::after{left:17px;top:40px}
  .footer-bottom{flex-direction:column}
}
@media (max-width:520px){
  .hero h1{font-size:25px}
  .brand-text strong{font-size:16px}
  .brand-text em{font-size:11px}
  .panel-head{flex-wrap:wrap;gap:8px}
  .faq-item{padding:0 16px}
  .faq-item summary{font-size:15px}
  .roadmap-track{gap:8px}
  .roadmap-step{font-size:12.8px;padding:7px 12px}
}

/* roulang page: article */
:root{
  --ink-900:#050b14;
  --ink-800:#070f1e;
  --ink-700:#0a1628;
  --panel:rgba(255,255,255,.045);
  --panel-strong:rgba(255,255,255,.075);
  --line:rgba(120,160,255,.16);
  --line-soft:rgba(120,160,255,.10);
  --text:#e8eefc;
  --muted:#9aabc8;
  --dim:#7d8fb0;
  --brand:#2f7bff;
  --brand-2:#22d3ee;
  --radius:16px;
  --radius-lg:22px;
  --shadow-glow:0 10px 28px rgba(47,123,255,.32);
  --shadow-card:0 18px 44px rgba(3,9,20,.55);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(1100px 620px at 12% -10%,rgba(47,123,255,.20),transparent 62%),
    radial-gradient(900px 520px at 92% 4%,rgba(34,211,238,.13),transparent 58%),
    var(--ink-900);
  overflow-x:hidden;
  overflow-wrap:break-word;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit}
:focus-visible{outline:2px solid rgba(124,178,255,.85);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,14,28,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:70px;flex-wrap:wrap;position:relative}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;padding:8px 0}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  font-size:18px;font-weight:700;color:#03111f;
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  box-shadow:0 8px 22px rgba(47,123,255,.38);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;letter-spacing:.5px}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.6px}
.nav-toggle{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.nav-burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;margin-left:auto;
}
.nav-burger span{display:block;height:2px;width:18px;margin:0 auto;border-radius:2px;background:#bcd0f0}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.site-nav a{
  display:block;padding:9px 15px;border-radius:11px;
  font-size:15px;color:var(--muted);
  transition:background .22s ease,color .22s ease,box-shadow .22s ease;
}
.site-nav a:hover{color:#fff;background:rgba(47,123,255,.14)}
.site-nav a.is-active{color:#fff;background:rgba(47,123,255,.18);box-shadow:inset 0 0 0 1px rgba(47,123,255,.38)}
.nav-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  color:#04121f;font-weight:600;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(47,123,255,.48)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(47,123,255,.36)}
.btn-ghost{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--text)}
.btn-ghost:hover{background:rgba(47,123,255,.15);border-color:rgba(47,123,255,.45);transform:translateY(-2px)}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:10px}

/* article hero */
.article-hero{padding:52px 0 30px;position:relative}
.article-hero::after{
  content:"";position:absolute;right:-12%;top:-40%;width:520px;height:520px;
  background:radial-gradient(circle,rgba(34,211,238,.13),transparent 66%);
  pointer-events:none;
}
.crumbs{position:relative;display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--dim);margin-bottom:18px}
.crumbs a{color:var(--muted);transition:color .2s ease}
.crumbs a:hover{color:#fff}
.crumbs span.sep{color:rgba(125,143,176,.55)}
.article-title{
  position:relative;font-size:34px;line-height:1.4;letter-spacing:-.3px;
  margin:0 0 18px;max-width:940px;
}
.article-meta{position:relative;display:flex;flex-wrap:wrap;gap:10px}
.meta-chip{
  font-size:13px;color:#a9c8ff;background:rgba(47,123,255,.12);
  border:1px solid rgba(47,123,255,.28);padding:5px 13px;border-radius:999px;
}
.meta-chip--cyan{color:#8ee9f7;background:rgba(34,211,238,.10);border-color:rgba(34,211,238,.30)}

/* layout */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:32px;align-items:start;padding-bottom:24px;
}
.article-card{
  min-width:0;padding:36px 36px 30px;
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-lg);box-shadow:var(--shadow-card);
}
.article-body{font-size:16px;line-height:1.95;color:#cfdaea}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  font-size:23px;line-height:1.5;color:#fff;margin:34px 0 14px;
  padding-left:14px;border-left:3px solid var(--brand);
}
.article-body h3{font-size:18.5px;line-height:1.55;color:#eaf2ff;margin:26px 0 10px}
.article-body h4{font-size:16.5px;color:#e2ecff;margin:20px 0 8px}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:22px;list-style:revert}
.article-body li{margin:7px 0}
.article-body a{color:#7cb2ff;border-bottom:1px solid rgba(124,178,255,.45);transition:color .2s ease,border-color .2s ease}
.article-body a:hover{color:#a9c8ff;border-color:rgba(169,200,255,.75)}
.article-body img{border-radius:14px;margin:18px 0;max-width:100%;height:auto}
.article-body blockquote{
  margin:20px 0;padding:14px 18px;color:#cfe6ef;
  border-left:3px solid var(--brand-2);
  background:rgba(34,211,238,.07);border-radius:0 12px 12px 0;
}
.article-body strong{color:#fff}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:rgba(47,123,255,.10);color:#eaf2ff;white-space:nowrap}
.article-body hr{border:0;border-top:1px solid var(--line-soft);margin:26px 0}
.article-empty{
  padding:34px 22px;text-align:center;border-radius:var(--radius);
  background:rgba(255,255,255,.03);border:1px dashed var(--line);
}
.article-empty p{color:var(--muted);margin-bottom:18px}

/* aside */
.article-aside{display:flex;flex-direction:column;gap:20px;min-width:0;position:sticky;top:92px}
.aside-card{
  padding:22px 22px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  box-shadow:0 14px 34px rgba(3,9,20,.45);
}
.aside-card h2,.aside-card h3{font-size:16px;margin-bottom:12px;color:#fff}
.aside-card p{font-size:13.5px;color:var(--muted);line-height:1.8}
.aside-card p + p{margin-top:10px}
.aside-links{display:flex;flex-direction:column;gap:8px;margin-top:14px}
.aside-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:10px;font-size:14px;color:var(--muted);
  background:rgba(255,255,255,.035);border:1px solid var(--line-soft);
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.aside-links a:hover{color:#fff;background:rgba(47,123,255,.14);border-color:rgba(47,123,255,.4);transform:translateX(3px)}
.aside-links a span{color:var(--dim);font-size:12px}
.aside-card--warn{background:rgba(255,193,94,.06);border-color:rgba(255,193,94,.26)}
.aside-card--warn h3{color:#f5d79a}
.aside-card--warn p{color:#d9c8a4}

/* sections */
.section{padding:68px 0;position:relative}
.section--alt{background:rgba(255,255,255,.018);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{max-width:800px;margin-bottom:34px}
.section-head h2{font-size:28px;letter-spacing:-.2px;margin-bottom:12px;line-height:1.45}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
  padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.4px;
  color:#a9c8ff;background:rgba(47,123,255,.14);border:1px solid rgba(47,123,255,.32);
}

/* download */
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{
  display:flex;flex-direction:column;gap:12px;min-width:0;padding:28px 24px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.45);background:var(--panel-strong);box-shadow:0 22px 50px rgba(3,9,20,.65)}
.dl-card h3{font-size:18px}
.dl-tag{
  align-self:flex-start;font-size:12px;color:#8ee9f7;
  padding:3px 10px;border-radius:999px;
  background:rgba(34,211,238,.10);border:1px solid rgba(34,211,238,.28);
}
.dl-card p{font-size:14px;color:var(--muted);line-height:1.78;flex:1 1 auto}
.dl-card .btn{width:100%;margin-top:6px}

/* points */
.points-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.point-card{
  min-width:0;padding:26px 24px;border-radius:var(--radius);
  background:var(--panel);border:1px solid var(--line);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.point-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.42);background:var(--panel-strong)}
.point-card h3{font-size:17.5px;margin-bottom:10px}
.point-card p{font-size:14.5px;color:var(--muted);line-height:1.85}
.point-num{
  display:inline-grid;place-items:center;width:34px;height:34px;margin-bottom:14px;
  border-radius:11px;font-size:14px;font-weight:700;color:#04121f;
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  box-shadow:0 8px 20px rgba(47,123,255,.32);
}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:920px}
.faq-item{
  border:1px solid var(--line);border-radius:14px;background:var(--panel);
  padding:0 20px;transition:border-color .22s ease,background .22s ease;
}
.faq-item[open]{border-color:rgba(47,123,255,.42);background:var(--panel-strong)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:17px 0;font-size:16px;font-weight:600;color:#eaf2ff;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";flex:0 0 auto;font-size:19px;line-height:1;color:#7cb2ff;transition:transform .22s ease;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 0 18px;color:var(--muted);font-size:14.5px;line-height:1.9}

/* cta */
.cta-band{
  padding:40px 36px;border-radius:var(--radius-lg);
  background:linear-gradient(135deg,rgba(47,123,255,.20),rgba(34,211,238,.10));
  border:1px solid rgba(47,123,255,.34);
  box-shadow:0 22px 52px rgba(3,9,20,.55);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:25px;line-height:1.45;margin-bottom:10px}
.cta-band p{color:#bccfe8;font-size:15px;max-width:640px;line-height:1.85}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* footer */
.site-footer{
  margin-top:26px;padding:56px 0 30px;
  border-top:1px solid var(--line);
  background:rgba(4,9,18,.72);
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.7fr) repeat(2,minmax(0,1fr));gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;font-size:16px;color:#fff}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:11px;font-size:15px}
.footer-grid p{font-size:14px;color:var(--muted);line-height:1.9;max-width:560px}
.footer-col h3{font-size:15px;margin-bottom:14px;color:#fff}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s ease}
.footer-col a:hover{color:#fff}
.risk-note{
  margin-top:32px;padding:16px 18px;border-radius:12px;
  border:1px solid rgba(255,193,94,.26);background:rgba(255,193,94,.06);
  color:#e2d2ac;font-size:13px;line-height:1.85;
}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  margin-top:22px;padding-top:18px;border-top:1px solid var(--line-soft);
  font-size:13px;color:var(--dim);line-height:1.8;
}

/* responsive */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .article-aside{position:static;flex-direction:row;flex-wrap:wrap}
  .article-aside > *{flex:1 1 300px}
  .points-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:980px){
  .nav-burger{display:flex}
  .site-nav{display:none;width:100%;order:5;margin-left:0}
  .nav-toggle:checked ~ .site-nav{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:6px;padding:8px 0 16px}
  .site-nav a{padding:12px 14px;background:rgba(255,255,255,.035);border:1px solid var(--line-soft)}
  .nav-tools{display:none}
  .article-title{font-size:29px}
  .cta-band{padding:30px 24px}
}
@media (max-width:820px){
  .download-grid{grid-template-columns:minmax(0,1fr)}
  .points-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .section{padding:52px 0}
  .article-card{padding:26px 22px 22px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  body{font-size:15.5px}
  .article-hero{padding:36px 0 22px}
  .article-title{font-size:24px;line-height:1.42}
  .article-body h2{font-size:20px}
  .article-body h3{font-size:17px}
  .section-head h2{font-size:22px}
  .cta-band h2{font-size:20px}
  .btn{width:100%}
  .cta-actions{width:100%}
  .article-aside{flex-direction:column}
}

/* roulang page: category1 */
:root{
  --ink-900:#050b14;
  --ink-800:#070f1e;
  --ink-700:#0a1628;
  --panel:rgba(255,255,255,.045);
  --panel-strong:rgba(255,255,255,.075);
  --line:rgba(120,160,255,.16);
  --line-soft:rgba(120,160,255,.10);
  --text:#e8eefc;
  --muted:#9aabc8;
  --dim:#7d8fb0;
  --brand:#2f7bff;
  --brand-2:#22d3ee;
  --radius:16px;
  --radius-lg:22px;
  --shadow-glow:0 10px 28px rgba(47,123,255,.32);
  --shadow-card:0 18px 44px rgba(3,9,20,.55);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:
    radial-gradient(1100px 620px at 12% -10%,rgba(47,123,255,.20),transparent 62%),
    radial-gradient(900px 520px at 92% 4%,rgba(34,211,238,.13),transparent 58%),
    var(--ink-900);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* header */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(6,14,28,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:70px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;padding:8px 0}
.brand-mark{
  width:42px;height:42px;border-radius:13px;display:grid;place-items:center;
  font-size:18px;font-weight:700;color:#03111f;
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  box-shadow:0 8px 22px rgba(47,123,255,.38);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:17px;letter-spacing:.5px}
.brand-text em{font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.6px}
.nav-toggle{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.nav-burger{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border-radius:11px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;margin-left:auto;
}
.nav-burger span{display:block;height:2px;width:18px;margin:0 auto;border-radius:2px;background:#bcd0f0}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.site-nav a{
  display:block;padding:9px 15px;border-radius:11px;
  font-size:15px;color:var(--muted);
  transition:background .22s ease,color .22s ease,box-shadow .22s ease;
}
.site-nav a:hover{color:#fff;background:rgba(47,123,255,.14)}
.site-nav a.is-active{color:#fff;background:rgba(47,123,255,.18);box-shadow:inset 0 0 0 1px rgba(47,123,255,.38)}
.nav-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.nav-toggle:focus-visible ~ .nav-burger{outline:2px solid #57a0ff;outline-offset:3px}

/* buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:12px;border:1px solid transparent;
  font-size:15px;font-weight:500;cursor:pointer;text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  color:#04121f;font-weight:600;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(47,123,255,.48)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(47,123,255,.36)}
.btn-ghost{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--text)}
.btn-ghost:hover{background:rgba(47,123,255,.15);border-color:rgba(47,123,255,.45);transform:translateY(-2px)}
.btn-sm{padding:8px 16px;font-size:14px;border-radius:10px}
.btn:focus-visible{outline:2px solid #57a0ff;outline-offset:3px}

/* hero */
.cat-hero{position:relative;padding:62px 0 70px;overflow:hidden}
.cat-hero::after{
  content:"";position:absolute;right:-8%;bottom:-45%;width:520px;height:520px;
  background:radial-gradient(circle,rgba(34,211,238,.14),transparent 65%);
  pointer-events:none;
}
.cat-hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:48px;align-items:start}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:.4px;
  color:#a9c8ff;background:rgba(47,123,255,.14);border:1px solid rgba(47,123,255,.32);
}
.cat-hero h1{font-size:38px;line-height:1.3;margin:20px 0 18px}
.cat-hero-lead{font-size:16px;color:#b6c6de;line-height:1.9}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  font-size:13px;color:#a9c8ff;padding:6px 13px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);
}
.panel{
  padding:26px 24px 20px;
  background:linear-gradient(180deg,rgba(255,255,255,.075),rgba(255,255,255,.03));
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}
.panel-head h2{font-size:16px;letter-spacing:.2px}
.panel-badge{
  font-size:11px;color:#7ce7f7;padding:3px 10px;border-radius:999px;
  background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.3);white-space:nowrap;
}
.quick-list li{display:flex;gap:12px;align-items:flex-start;padding:13px 0;border-bottom:1px dashed var(--line-soft)}
.quick-list li:last-child{border-bottom:0;padding-bottom:2px}
.quick-idx{
  flex:0 0 26px;height:26px;margin-top:2px;border-radius:9px;display:grid;place-items:center;
  font-size:12px;color:#9fc4ff;background:rgba(47,123,255,.16);border:1px solid rgba(47,123,255,.3);
}
.quick-body{min-width:0}
.quick-body strong{display:block;font-size:14.5px;color:#e6eeff;margin-bottom:2px}
.quick-body span{font-size:13.5px;color:var(--muted);line-height:1.7;display:block}

/* sections */
.section{padding:72px 0;position:relative}
.section--alt{background:rgba(255,255,255,.018);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.section-head{max-width:800px;margin-bottom:36px}
.section-head h2{font-size:29px;line-height:1.35;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:15.5px;line-height:1.85}
.section-head .eyebrow{margin-bottom:16px}

/* cards */
.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.feature-card{
  min-width:0;padding:26px 24px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.45);background:var(--panel-strong);box-shadow:0 22px 50px rgba(3,9,20,.65)}
.feature-card h3{font-size:17.5px;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--muted);line-height:1.8}
.card-tag{
  display:inline-block;font-size:12px;color:#7ce7f7;letter-spacing:.5px;margin-bottom:12px;
  padding:3px 10px;border-radius:999px;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.26);
}

/* flow */
.flow-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.flow-step{
  min-width:0;position:relative;padding:24px 22px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .25s ease,transform .25s ease,background .25s ease;
}
.flow-step:hover{border-color:rgba(47,123,255,.42);transform:translateY(-3px);background:var(--panel-strong)}
.flow-num{
  width:32px;height:32px;border-radius:10px;display:grid;place-items:center;
  font-size:14px;font-weight:700;color:#04121f;
  background:linear-gradient(135deg,#2f7bff,#22d3ee);
  margin-bottom:14px;
}
.flow-step h3{font-size:16px;margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--muted);line-height:1.78}

/* spec */
.spec-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.spec-card{
  min-width:0;display:flex;gap:16px;padding:22px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  transition:border-color .25s ease,background .25s ease;
}
.spec-card:hover{border-color:rgba(34,211,238,.36);background:var(--panel-strong)}
.spec-key{
  flex:0 0 auto;width:76px;font-size:13.5px;color:#9fc4ff;
  border-right:1px solid var(--line-soft);padding-right:14px;line-height:1.6;
}
.spec-val{min-width:0;font-size:14.5px;color:var(--muted);line-height:1.8}
.spec-val strong{display:block;color:#e6eeff;font-size:15px;margin-bottom:4px}

/* risk flow */
.risk-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:26px}
.risk-node{
  min-width:0;padding:20px;border-radius:var(--radius);
  background:rgba(47,123,255,.07);border:1px solid rgba(47,123,255,.24);
}
.risk-node:nth-child(4){background:rgba(255,120,120,.07);border-color:rgba(255,120,120,.26)}
.risk-node h3{font-size:15.5px;margin-bottom:8px;color:#dbe7ff}
.risk-node p{font-size:13.5px;color:var(--muted);line-height:1.75}
.rule-list{display:grid;gap:12px;max-width:920px}
.rule-list li{
  display:flex;gap:12px;align-items:flex-start;min-width:0;
  padding:14px 18px;border-radius:13px;
  background:rgba(255,255,255,.035);border:1px solid var(--line-soft);
  font-size:14.5px;color:var(--muted);line-height:1.8;
}
.rule-list .dot{flex:0 0 8px;width:8px;height:8px;margin-top:9px;border-radius:50%;background:linear-gradient(135deg,#2f7bff,#22d3ee)}

/* download */
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.dl-card{
  display:flex;flex-direction:column;gap:12px;min-width:0;padding:28px 24px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.45);background:var(--panel-strong);box-shadow:0 22px 50px rgba(3,9,20,.65)}
.dl-card h3{font-size:18px}
.dl-card p{font-size:14px;color:var(--muted);flex:1 1 auto;line-height:1.75}
.dl-card .btn{width:100%;margin-top:6px}

/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.news-card{
  display:flex;flex-direction:column;gap:10px;min-width:0;padding:22px;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  transition:transform .25s ease,border-color .25s ease,background .25s ease;
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(47,123,255,.42);background:var(--panel-strong)}
.news-tag{
  align-self:flex-start;font-size:12px;color:#7ce7f7;padding:3px 10px;border-radius:999px;
  background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.26);
}
.news-card h3{font-size:16px;line-height:1.55;overflow-wrap:break-word}
.news-card h3 a{transition:color .2s ease}
.news-card h3 a:hover{color:#7cb2ff}
.news-card p{font-size:14px;color:var(--muted);line-height:1.78;overflow-wrap:break-word}
.news-date{font-size:12.5px;color:var(--dim);margin-top:auto}
.news-empty{
  padding:26px 24px;border-radius:var(--radius);border:1px dashed var(--line);
  color:var(--muted);font-size:15px;background:rgba(255,255,255,.03);
}

/* faq */
.faq-list{display:grid;gap:12px;max-width:920px}
.faq-item{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:0 20px;transition:border-color .25s ease,background .25s ease;
}
.faq-item[open]{border-color:rgba(47,123,255,.4);background:var(--panel-strong)}
.faq-item summary{
  cursor:pointer;padding:16px 0;font-size:15.5px;font-weight:600;color:#e6eeff;
  list-style:none;display:flex;justify-content:space-between;gap:14px;align-items:flex-start;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:#7cb2ff;font-size:19px;line-height:1;flex:0 0 auto}
.faq-item[open] summary::after{content:"–"}
.faq-item p{margin:0 0 18px;color:var(--muted);font-size:14.5px;line-height:1.85}

/* footer */
.site-footer{
  margin-top:10px;padding:56px 0 30px;
  background:rgba(4,10,20,.72);
  border-top:1px solid var(--line);
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,.75fr));gap:34px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-brand strong{font-size:16px;line-height:1.4}
.site-footer p{font-size:14px;color:var(--muted);line-height:1.85;max-width:520px}
.footer-col h3{font-size:15px;margin-bottom:14px;color:#dbe7ff}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14px;color:var(--muted);transition:color .2s ease}
.footer-col a:hover{color:#7cb2ff}
.footer-col a:focus-visible{outline:2px solid #57a0ff;outline-offset:3px;border-radius:6px}
.risk-note{
  margin-top:34px;padding:16px 20px;border-radius:14px;
  font-size:13px;color:#93a5c2;line-height:1.85;
  background:rgba(255,255,255,.03);border:1px solid var(--line-soft);
}
.footer-bottom{
  margin-top:20px;padding-top:18px;border-top:1px solid var(--line-soft);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--dim);
}

/* responsive */
@media (max-width:1024px){
  .cat-hero-grid{grid-template-columns:minmax(0,1fr);gap:34px}
  .cat-hero h1{font-size:34px}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .flow-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .risk-flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .section{padding:60px 0}
}
@media (max-width:860px){
  .nav-burger{display:flex}
  .site-nav{display:none;width:100%;margin-left:0;order:5;padding-bottom:14px}
  .nav-toggle:checked ~ .site-nav{display:block}
  .site-nav ul{flex-direction:column;align-items:stretch;gap:4px}
  .site-nav a{padding:11px 14px}
  .nav-tools{order:4;margin-left:0}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .cat-hero{padding:44px 0 52px}
  .cat-hero h1{font-size:29px;line-height:1.35}
  .cat-hero-lead{font-size:15px}
  .section{padding:50px 0}
  .section-head h2{font-size:24px}
  .feature-grid,.flow-grid,.spec-grid,.risk-flow,.download-grid,.news-grid{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
  .spec-card{flex-direction:column;gap:10px}
  .spec-key{width:auto;border-right:0;padding-right:0;border-bottom:1px solid var(--line-soft);padding-bottom:8px}
}
@media (max-width:520px){
  .brand-text strong{font-size:15.5px}
  .brand-text em{font-size:11px}
  .cat-hero h1{font-size:25px}
  .hero-actions .btn{width:100%}
  .section-head h2{font-size:21px}
  .feature-card,.dl-card,.flow-step,.news-card{padding:20px 18px}
  .panel{padding:22px 18px 16px}
  .footer-bottom{flex-direction:column;gap:8px}
}