/* roulang page: index */
:root{
  --bg-base:#060A12;
  --bg-deep:#0A1220;
  --bg-panel:#0F1A2C;
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(140,190,255,.16);
  --primary:#2B6CF6;
  --primary-2:#4C8DFF;
  --cyan:#17C8C0;
  --violet:#7C5CFF;
  --warm:#FFB454;
  --t1:#EAF1FF;
  --t2:#A9B8CE;
  --t3:#6C7C94;
  --line:rgba(255,255,255,.08);
  --success:#22C55E;
  --warning:#F59E0B;
  --danger:#EF4444;
  --r-btn:12px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --shadow-card:0 20px 60px rgba(0,0,0,.45),0 0 0 1px rgba(255,255,255,.06);
  --shadow-hover:0 26px 70px rgba(0,0,0,.6),0 0 0 1px rgba(140,190,255,.24);
  --sp:96px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--t1);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
}
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:repeating-linear-gradient(135deg,rgba(140,190,255,.12) 0 1px,transparent 1px 180px);
  opacity:.5;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
strong{color:var(--t1);font-weight:700}
::selection{background:rgba(43,108,246,.45);color:#fff}
:focus-visible{outline:2px solid var(--violet);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:var(--sp) 0;position:relative}
.section + .section{border-top:1px solid rgba(255,255,255,.08)}
.section-alt{background:linear-gradient(180deg,rgba(10,18,32,.85),rgba(6,10,18,0))}

.sec-head{margin-bottom:44px;max-width:760px}
.sec-num{display:block;font-size:14px;letter-spacing:.3em;color:var(--t3);margin-bottom:14px}
.sec-title{font-size:32px;line-height:1.3}
.sec-desc{margin-top:16px;color:var(--t2);font-size:16px;max-width:720px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  border:1px solid transparent;cursor:pointer;
}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 10px 30px rgba(43,108,246,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(43,108,246,.6)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 18px rgba(43,108,246,.4)}
.btn-outline{border-color:var(--glass-line);color:var(--t1);background:rgba(255,255,255,.02)}
.btn-outline:hover{background:rgba(255,255,255,.06);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{min-height:44px;padding:0 4px;color:var(--t2);position:relative}
.btn-ghost::after{content:"";position:absolute;left:4px;right:4px;bottom:8px;height:1px;background:currentColor;transform:scaleX(.35);transform-origin:left;transition:transform .3s var(--ease)}
.btn-ghost:hover{color:var(--t1)}
.btn-ghost:hover::after{transform:scaleX(1)}
.btn-sm{min-height:42px;padding:0 20px;font-size:14px}
.btn-block{width:100%}

.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 11px;border-radius:var(--r-pill);font-size:12px;line-height:1.7;border:1px solid rgba(23,200,192,.45);color:var(--cyan);background:rgba(23,200,192,.08)}
.badge-warm{border-color:rgba(255,180,84,.5);color:var(--warm);background:rgba(255,180,84,.1)}
.dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px rgba(23,200,192,.9);flex:none}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;height:74px;display:flex;align-items:center;
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(6,10,18,.8);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  backdrop-filter:blur(18px) saturate(130%);
  border-bottom-color:var(--glass-line);
  box-shadow:0 18px 40px rgba(0,0,0,.45);
}
.nav-wrap{display:flex;align-items:center;gap:18px;width:100%}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em}
.brand-mark{
  width:38px;height:38px;border-radius:11px;flex:none;
  background:linear-gradient(135deg,var(--primary),var(--violet));
  display:grid;place-items:center;box-shadow:0 0 24px rgba(43,108,246,.55);
}
.brand-mark svg{width:21px;height:21px}
.brand-text em{
  font-style:normal;font-size:12px;color:var(--cyan);margin-left:8px;
  border:1px solid rgba(23,200,192,.42);border-radius:var(--r-pill);padding:1px 8px;vertical-align:1px;
}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:var(--r-btn);
  color:var(--t2);font-size:15px;transition:color .2s,background .2s,box-shadow .2s;
}
.nav-link svg{width:16px;height:16px;color:var(--cyan);flex:none}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.06)}
.nav-link.is-active{color:var(--t1);background:rgba(43,108,246,.16);box-shadow:inset 0 0 0 1px rgba(43,108,246,.42)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--glass-line);align-items:center;justify-content:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t1);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- Drawer ---------- */
.drawer{position:fixed;inset:0;z-index:120;visibility:hidden;opacity:0;transition:opacity .3s var(--ease),visibility .3s}
.drawer.is-open{visibility:visible;opacity:1}
.drawer-mask{position:absolute;inset:0;background:rgba(3,6,12,.72)}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(88vw,336px);
  background:var(--bg-deep);border-left:1px solid var(--glass-line);
  display:flex;flex-direction:column;padding:20px;
  transform:translateX(100%);transition:transform .34s var(--ease);
  box-shadow:-30px 0 70px rgba(0,0,0,.6);
}
.drawer.is-open .drawer-panel{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-title{font-size:15px;font-weight:700;color:var(--t2)}
.drawer-close{width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--glass-line);display:grid;place-items:center;font-size:20px;color:var(--t2)}
.drawer-close:hover{background:rgba(255,255,255,.07);color:var(--t1)}
.drawer-nav{display:flex;flex-direction:column;gap:8px;overflow:auto}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  min-height:52px;padding:0 16px;border-radius:var(--r-btn);
  color:var(--t2);border:1px solid transparent;font-size:15px;
}
.drawer-link svg{width:16px;height:16px;color:var(--cyan)}
.drawer-link:hover{background:rgba(255,255,255,.06);color:var(--t1)}
.drawer-link.is-active{color:var(--t1);background:rgba(43,108,246,.16);border-color:rgba(43,108,246,.42)}
.drawer-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:104px 0 84px;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  filter:saturate(.9);
}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(4,7,14,.94) 0%,rgba(4,7,14,.86) 46%,rgba(4,7,14,.68) 100%)}
.hero-inner{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center;position:relative;z-index:2}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;
  padding:6px 14px;border-radius:var(--r-pill);font-size:13px;
  border:1px solid var(--glass-line);background:rgba(255,255,255,.04);color:var(--t2);
}
.hero h1{font-size:42px;line-height:1.25;max-width:640px}
.hero h1 span{color:var(--cyan)}
.hero-sub{margin-top:20px;font-size:17px;color:var(--t2);max-width:600px;line-height:1.9}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust{margin-top:22px;font-size:13px;color:var(--t3);letter-spacing:.01em}
.hero-card{
  border-radius:var(--r-card);padding:26px;
  background:var(--glass);
  border:1px solid var(--glass-line);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  backdrop-filter:blur(18px) saturate(130%);
  box-shadow:var(--shadow-card);
}
.hero-card-title{font-size:15px;color:var(--t2);font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:18px}
.stat-row{display:flex;align-items:baseline;justify-content:space-between;gap:14px;padding:14px 0;border-bottom:1px dashed rgba(255,255,255,.1)}
.stat-row:last-of-type{border-bottom:0}
.stat-label{font-size:14px;color:var(--t2)}
.stat-value{font-size:19px;font-weight:700;color:var(--cyan);letter-spacing:.01em;white-space:nowrap}
.hero-card-foot{margin-top:18px;padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--t3);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ---------- Merits ---------- */
.merit-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.merit-card{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-card);position:relative;overflow:hidden;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.merit-card::before{content:"";position:absolute;left:0;top:0;width:3px;height:56px;background:linear-gradient(180deg,var(--primary),transparent)}
.merit-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(140,190,255,.24)}
.merit-card:nth-child(1){margin-top:0}
.merit-card:nth-child(2){margin-top:34px}
.merit-card:nth-child(3){margin-top:-14px}
.merit-card:nth-child(4){margin-top:20px}
.merit-icon{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:rgba(43,108,246,.15);border:1px solid rgba(43,108,246,.36);margin-bottom:18px}
.merit-icon svg{width:22px;height:22px;color:var(--primary-2)}
.merit-card h3{font-size:22px;margin-bottom:12px}
.merit-card p{color:var(--t2);font-size:15px}
.merit-list{margin-top:16px;display:flex;flex-direction:column;gap:9px}
.merit-list li{display:flex;gap:9px;font-size:14px;color:var(--t2);line-height:1.8}
.merit-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);margin-top:11px;flex:none}

/* ---------- Demo ---------- */
.demo-grid{display:grid;grid-template-columns:8fr 4fr;gap:34px;align-items:center}
.demo-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-card);aspect-ratio:16/9;background:var(--bg-deep)}
.demo-media img{width:100%;height:100%;object-fit:cover}
.demo-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,7,14,.18),rgba(4,7,14,.55))}
.demo-tag{position:absolute;left:18px;bottom:18px;z-index:2}
.demo-points{display:flex;flex-direction:column;gap:20px}
.demo-point{padding-left:18px;border-left:2px solid rgba(43,108,246,.5)}
.demo-point h3{font-size:18px;margin-bottom:8px}
.demo-point p{font-size:14px;color:var(--t2)}

/* ---------- Proof ---------- */
.proof-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:40px}
.proof-item{background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-card);transition:border-color .25s var(--ease),transform .25s var(--ease)}
.proof-item:hover{border-color:rgba(140,190,255,.26);transform:translateY(-4px)}
.proof-num{font-size:28px;font-weight:800;color:var(--cyan);letter-spacing:.01em;line-height:1.2}
.proof-label{margin-top:8px;font-size:14px;color:var(--t2)}
.proof-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.proof-card{background:var(--bg-deep);border:1px solid var(--line);border-radius:var(--r-card);padding:28px;position:relative}
.proof-card::before{content:"“";position:absolute;top:8px;right:22px;font-size:56px;color:rgba(43,108,246,.22);line-height:1}
.proof-card h3{font-size:18px;margin-bottom:12px}
.proof-card p{color:var(--t2);font-size:15px}
.proof-card ul{margin-top:14px;display:flex;flex-wrap:wrap;gap:10px}
.proof-card ul li{font-size:13px;color:var(--t3);border:1px solid var(--line);border-radius:var(--r-pill);padding:2px 12px}

/* ---------- Pricing ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.price-card{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 26px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
  position:relative;
}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(140,190,255,.24)}
.price-card.is-featured{
  background:var(--glass);border-color:var(--glass-line);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  backdrop-filter:blur(18px) saturate(130%);
  transform:translateY(-8px);
  box-shadow:0 30px 80px rgba(0,0,0,.6),0 0 0 1px rgba(140,190,255,.24);
}
.price-card.is-featured:hover{transform:translateY(-14px)}
.price-flag{position:absolute;top:-12px;right:20px}
.price-name{font-size:20px;font-weight:800}
.price-note{margin-top:8px;font-size:14px;color:var(--t3)}
.price-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.price-list li{display:flex;gap:10px;font-size:14px;color:var(--t2);line-height:1.75}
.price-list li svg{width:16px;height:16px;color:var(--cyan);flex:none;margin-top:6px}
.price-card .btn{margin-top:26px}

/* ---------- News ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-card);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(140,190,255,.28)}
.news-media{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--bg-deep);border-radius:0;position:relative}
.news-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);border-radius:0}
.news-card:hover .news-media img{transform:scale(1.03)}
.news-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.news-title{font-size:19px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-title a:hover{color:var(--primary-2)}
.news-desc{font-size:14px;color:var(--t2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--t3);border-top:1px solid var(--line);padding-top:14px}
.news-more{color:var(--cyan);display:inline-flex;align-items:center;gap:5px;font-weight:700}
.news-card:hover .news-more{gap:9px}
.news-more svg{width:14px;height:14px;transition:transform .25s var(--ease)}
.news-empty{
  grid-column:1/-1;text-align:center;padding:56px 24px;border:1px dashed rgba(140,190,255,.28);
  border-radius:var(--r-card);background:rgba(15,26,44,.6);color:var(--t2);
}
.news-empty p{margin-bottom:18px}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:880px}
.faq-item{background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;transition:border-color .25s var(--ease)}
.faq-item[open]{border-color:rgba(43,108,246,.42)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 26px;display:flex;align-items:center;justify-content:space-between;gap:18px;
  font-size:17px;font-weight:700;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary-2)}
.faq-item summary::after{content:"+";font-size:22px;color:var(--cyan);line-height:1;transition:transform .26s var(--ease)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{padding:0 26px 24px;color:var(--t2);font-size:15px;max-width:760px}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;padding:56px 48px;
  background:linear-gradient(120deg,rgba(43,108,246,.28),rgba(124,92,255,.16) 55%,rgba(23,200,192,.14));
  border:1px solid var(--glass-line);
  box-shadow:var(--shadow-card);
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:30px;max-width:620px}
.cta-band p{margin-top:14px;color:var(--t2);max-width:600px;font-size:15px}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Footer ---------- */
.site-footer{margin-top:var(--sp);border-top:1px solid var(--line);background:rgba(8,13,24,.9);position:relative;z-index:1}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:34px;padding:64px 0 40px}
.footer-brand p{margin-top:18px;color:var(--t2);font-size:14px;max-width:340px}
.footer-col h3{font-size:15px;color:var(--t1);margin-bottom:18px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{color:var(--t2);font-size:14px;border-bottom:2px solid transparent;transition:color .2s,border-color .2s}
.footer-col a:hover{color:var(--t1);border-bottom-color:var(--primary)}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 90px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--t3);
}
.footer-bottom a{color:var(--t3)}
.footer-bottom a:hover{color:var(--t1)}

/* ---------- Floating CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:100;
  display:inline-flex;align-items:center;gap:10px;min-height:52px;padding:0 24px;
  border-radius:var(--r-pill);font-size:15px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  border:1px solid rgba(255,255,255,.16);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  backdrop-filter:blur(18px) saturate(130%);
  box-shadow:0 18px 46px rgba(43,108,246,.5);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),box-shadow .25s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{box-shadow:0 0 36px rgba(43,108,246,.75)}
.float-cta svg{width:18px;height:18px}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  :root{--sp:82px}
  .hero h1{font-size:38px}
}
@media (max-width:1023px){
  :root{--sp:72px}
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .hero{padding:78px 0 64px}
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:34px;max-width:100%}
  .merit-grid{grid-template-columns:1fr 1fr;gap:18px}
  .merit-card:nth-child(n){margin-top:0}
  .demo-grid{grid-template-columns:1fr;gap:26px}
  .proof-bar{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;gap:20px}
  .price-card.is-featured{transform:none}
  .price-card.is-featured:hover{transform:translateY(-6px)}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-band{padding:44px 32px}
}
@media (max-width:767px){
  :root{--sp:48px}
  .container{padding:0 16px}
  .brand-text{font-size:16px}
  .brand-text em{display:none}
  .hero h1{font-size:29px}
  .hero-sub{font-size:16px}
  .sec-title{font-size:25px}
  .merit-grid,.proof-bar,.proof-cards,.news-grid,.footer-grid{grid-template-columns:1fr}
  .cta-band{padding:34px 22px;border-radius:18px}
  .cta-band h2{font-size:24px}
  .faq-item summary{padding:18px 20px;font-size:16px}
  .faq-body{padding:0 20px 20px}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;justify-content:center;
    padding:14px 16px calc(14px + env(safe-area-inset-bottom));
    min-height:56px;transform:translateY(100%);
  }
  .float-cta.is-visible{transform:translateY(0)}
  .footer-bottom{padding-bottom:110px}
}
@media (max-width:480px){
  .hero h1{font-size:26px}
  .hero-cta .btn{width:100%}
  .btn{padding:0 20px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg-base:#060A12;
  --bg-deep:#0A1220;
  --bg-panel:#0F1A2C;
  --glass:rgba(255,255,255,0.045);
  --glass-line:rgba(140,190,255,0.16);
  --primary:#2B6CF6;
  --primary-2:#4C8DFF;
  --cyan:#17C8C0;
  --violet:#7C5CFF;
  --warm:#FFB454;
  --t1:#EAF1FF;
  --t2:#A9B8CE;
  --t3:#6C7C94;
  --line:rgba(255,255,255,0.08);
  --ok:#22C55E;
  --warn:#F59E0B;
  --err:#EF4444;
  --r-btn:12px;
  --r-card:18px;
  --r-img:14px;
  --shadow-card:0 20px 60px rgba(0,0,0,.45), 0 0 0 1px rgba(255,255,255,.06);
  --shadow-hover:0 28px 72px rgba(0,0,0,.6), 0 0 0 1px rgba(140,190,255,.22);
  --container:1240px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--t2);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  background:
    radial-gradient(1100px 560px at 12% -12%,rgba(43,108,246,.20),transparent 62%),
    radial-gradient(820px 460px at 92% -6%,rgba(124,92,255,.14),transparent 60%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;color:var(--t1);font-weight:800;letter-spacing:-.01em}
p{margin:0 0 1.2em}
ul,ol{margin:0;padding:0}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--violet);
  outline-offset:2px;
  border-radius:8px;
  box-shadow:0 0 0 6px rgba(124,92,255,.20);
}
::selection{background:rgba(43,108,246,.4);color:#fff}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.num{font-family:Inter,"DIN Alternate","Segoe UI",sans-serif;font-weight:700;letter-spacing:.01em}

/* ---------- 按钮体系 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),background-color 220ms var(--ease),border-color 220ms var(--ease),color 220ms var(--ease);
}
.btn-primary{background:linear-gradient(135deg,#2B6CF6,#4C8DFF);color:#fff;box-shadow:0 12px 32px rgba(43,108,246,.34)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(43,108,246,.6)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--glass-line);color:var(--t1)}
.btn-ghost:hover{background:rgba(255,255,255,.06);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-line{
  display:inline-flex;align-items:center;gap:6px;color:var(--t1);font-weight:700;font-size:14.5px;
  padding-bottom:2px;border-bottom:1px solid rgba(234,241,255,.5);
  transition:border-color 220ms var(--ease),color 220ms var(--ease);
}
.btn-line:hover{border-bottom-color:var(--cyan);color:var(--cyan)}
.btn-sm{height:42px;padding:0 20px;font-size:14px;border-radius:11px}
.btn-block{width:100%}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;height:74px;display:flex;align-items:center;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(16px) saturate(130%);
  -webkit-backdrop-filter:blur(16px) saturate(130%);
  border-bottom:1px solid transparent;
  transition:background-color 260ms var(--ease),border-color 260ms var(--ease),box-shadow 260ms var(--ease);
}
.site-header.is-scrolled{background:rgba(6,10,18,.93);border-bottom-color:var(--line);box-shadow:0 16px 44px rgba(0,0,0,.5)}
.nav-wrap{display:flex;align-items:center;gap:26px;height:74px;width:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,#2B6CF6,#4C8DFF);
  box-shadow:0 0 24px rgba(43,108,246,.45);
}
.brand-mark svg{width:20px;height:20px}
.brand-text{font-size:17px;font-weight:800;color:var(--t1);white-space:nowrap;letter-spacing:-.01em}
.brand-text em{
  font-style:normal;font-size:12.5px;font-weight:700;color:var(--cyan);
  margin-left:6px;padding:2px 8px;border-radius:999px;
  border:1px solid rgba(23,200,192,.42);background:rgba(23,200,192,.09);
  vertical-align:middle;
}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:8px}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:10px 14px;border-radius:10px;
  font-size:14.5px;color:var(--t2);font-weight:500;
  border:1px solid transparent;
  transition:color 200ms var(--ease),background-color 200ms var(--ease),border-color 200ms var(--ease);
}
.nav-link svg{width:16px;height:16px;opacity:.85;flex-shrink:0}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.06);border-color:rgba(140,190,255,.14)}
.nav-link.is-active{color:var(--t1);background:rgba(43,108,246,.15);border-color:rgba(43,108,246,.38)}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--glass-line);background:rgba(255,255,255,.03);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--t1);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--t1);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 抽屉 ---------- */
.drawer{
  position:fixed;top:0;right:0;width:min(340px,86vw);height:100%;z-index:90;
  display:flex;flex-direction:column;padding:20px;
  background:var(--bg-deep);border-left:1px solid var(--line);
  box-shadow:-30px 0 70px rgba(0,0,0,.62);
  transform:translateX(103%);
  transition:transform 320ms var(--ease);
}
.drawer.is-open{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-close{
  width:40px;height:40px;border-radius:11px;border:1px solid var(--glass-line);
  background:rgba(255,255,255,.03);color:var(--t1);font-size:20px;line-height:1;
  display:grid;place-items:center;
}
.drawer-close:hover{background:rgba(255,255,255,.08)}
.drawer-links{display:flex;flex-direction:column;gap:6px;margin-top:24px}
.drawer-links a{
  padding:14px;border-radius:12px;font-size:15.5px;color:var(--t2);
  border:1px solid transparent;transition:all 200ms var(--ease);
}
.drawer-links a:hover,.drawer-links a.is-active{color:var(--t1);background:rgba(43,108,246,.14);border-color:rgba(43,108,246,.34)}
.drawer-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.drawer-mask{
  position:fixed;inset:0;z-index:80;background:rgba(3,6,12,.66);
  opacity:0;visibility:hidden;transition:opacity 300ms var(--ease),visibility 300ms var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* ---------- 文章头 ---------- */
.article-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:30px 0 50px}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity:.2;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,10,18,.76),rgba(6,10,18,.94) 64%,var(--bg-base));
}
.article-hero .beam{
  position:absolute;top:26%;left:-10%;width:120%;height:1px;z-index:1;
  background:linear-gradient(90deg,transparent,rgba(140,190,255,.45),transparent);
  transform:rotate(-7deg);
}
.article-hero .container{position:relative;z-index:2}
.crumbs{padding:22px 0 0}
.crumbs ol{display:flex;flex-wrap:wrap;align-items:center;gap:9px;list-style:none;font-size:13.5px;color:var(--t3)}
.crumbs a{color:var(--t2);transition:color 200ms var(--ease)}
.crumbs a:hover{color:var(--t1);text-decoration:underline;text-underline-offset:3px}
.crumbs .sep{color:var(--t3)}
.crumbs .current{color:var(--t1);max-width:min(560px,62vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.badge-cat{
  display:inline-flex;align-items:center;gap:7px;margin-top:26px;
  font-size:12.5px;font-weight:700;color:var(--cyan);letter-spacing:.06em;
  padding:6px 14px;border-radius:999px;
  border:1px solid rgba(23,200,192,.42);background:rgba(23,200,192,.09);
}
.badge-cat::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.article-hero h1{
  font-size:44px;line-height:1.25;margin:18px 0 0;
  max-width:920px;word-break:break-word;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 24px;
  margin-top:26px;padding:16px 0;font-size:14px;color:var(--t3);
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.meta-row .item{display:inline-flex;align-items:center;gap:9px}
.meta-row .dot{width:5px;height:5px;border-radius:50%;background:var(--cyan);flex-shrink:0}
.meta-row .dot.violet{background:var(--violet)}
.meta-row .dot.blue{background:var(--primary-2)}

/* ---------- 目录 ---------- */
.toc{display:none}
.toc summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;
  padding:15px 0;font-size:15px;font-weight:700;color:var(--t1);cursor:pointer;
}
.toc summary::-webkit-details-marker{display:none}
.toc summary::after{
  content:"展开";font-size:12.5px;font-weight:600;color:var(--cyan);
  padding:3px 10px;border-radius:999px;border:1px solid rgba(23,200,192,.4);
}
.toc[open] summary::after{content:"收起"}
.toc ul{list-style:none;display:flex;flex-direction:column;gap:2px;padding:0 0 14px}
.toc a{
  display:block;padding:7px 12px;border-radius:9px;font-size:14px;color:var(--t2);
  border-left:2px solid transparent;transition:all 200ms var(--ease);
}
.toc a:hover{color:var(--t1);background:rgba(255,255,255,.05);border-left-color:var(--primary)}
.toc li.lv3 a{padding-left:26px;font-size:13.5px;color:var(--t3)}
.toc li.lv3 a:hover{color:var(--t2)}

/* ---------- 正文 ---------- */
.article-main{padding:8px 0 0}
.article-body{
  max-width:760px;margin:0 auto;padding:52px 0 0;
  font-size:16px;line-height:1.85;color:var(--t2);word-break:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body h2{font-size:22px;line-height:1.5;margin:40px 0 16px;scroll-margin-top:100px}
.article-body h3{font-size:18px;line-height:1.6;margin:32px 0 14px;scroll-margin-top:100px}
.article-body h4{font-size:17px;line-height:1.6;margin:26px 0 12px}
.article-body p{margin:0 0 1.2em}
.article-body strong{color:var(--t1);font-weight:700}
.article-body em{font-style:normal;color:var(--cyan)}
.article-body a{color:#8FB6FF;text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#fff}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:0 0 .55em;line-height:1.9}
.article-body blockquote{
  margin:26px 0;padding:16px 22px;border-left:3px solid var(--primary);
  background:rgba(43,108,246,.1);border-radius:0 12px 12px 0;color:var(--t1);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{width:100%;height:auto;border-radius:var(--r-img);margin:24px 0 8px}
.article-body figcaption{font-size:13px;color:var(--t3);text-align:center;margin:0 0 24px}
.article-body table{
  width:100%;display:block;overflow-x:auto;border-collapse:collapse;
  margin:24px 0;font-size:14.5px;-webkit-overflow-scrolling:touch;
}
.article-body th,.article-body td{padding:12px 14px;border:1px solid var(--line);text-align:left;white-space:nowrap}
.article-body th{background:rgba(255,255,255,.045);color:var(--t1);font-weight:700}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.015)}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:14px;padding:2px 7px;border-radius:6px;
  background:rgba(43,108,246,.16);color:#C9DCFF;
}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}
.article-body figure{margin:0}

/* ---------- 文末 ---------- */
.article-foot{
  max-width:760px;margin:44px auto 0;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
}
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  font-size:13px;color:var(--t2);padding:6px 14px;border-radius:999px;
  border:1px solid var(--glass-line);background:rgba(255,255,255,.03);
  transition:all 200ms var(--ease);
}
.tag:hover{color:var(--t1);border-color:rgba(43,108,246,.5);background:rgba(43,108,246,.13)}
.source-line{font-size:13px;color:var(--t3)}
.article-cta{
  max-width:760px;margin:32px auto 0;padding:22px 24px;border-radius:var(--r-card);
  background:var(--bg-panel);box-shadow:var(--shadow-card);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.article-cta strong{display:block;color:var(--t1);font-size:17px;margin-bottom:4px}
.article-cta span{font-size:14px;color:var(--t2)}
.empty-state{
  text-align:center;padding:60px 24px;border-radius:var(--r-card);
  background:var(--bg-panel);border:1px dashed var(--glass-line);
}
.empty-state h2{font-size:22px;margin-bottom:12px}
.empty-state p{max-width:460px;margin:0 auto 24px;color:var(--t2);font-size:15px}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0}
.section-line{height:1px;background:var(--line);border:0;margin:0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.eyebrow{display:block;font-size:14px;letter-spacing:.3em;color:var(--t3);margin-bottom:12px}
.section-title{font-size:31px;line-height:1.3}
.section-desc{margin-top:12px;max-width:640px;font-size:15px;color:var(--t2)}

/* ---------- 卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.news-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--bg-panel);border-radius:var(--r-card);box-shadow:var(--shadow-card);
  transition:transform 250ms var(--ease),box-shadow 250ms var(--ease);
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-deep)}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.news-card:hover .thumb img{transform:scale(1.03)}
.thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,18,0) 42%,rgba(6,10,18,.78))}
.card-body{padding:22px 24px 26px;display:flex;flex-direction:column;gap:12px;flex:1}
.chip{
  align-self:flex-start;font-size:12.5px;font-weight:700;color:var(--cyan);
  padding:4px 12px;border-radius:999px;
  border:1px solid rgba(23,200,192,.4);background:rgba(23,200,192,.08);
}
.card-body h3{
  font-size:19px;line-height:1.5;color:var(--t1);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-body p{
  font-size:14px;line-height:1.8;color:var(--t2);margin:0;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--t3);
}
.card-meta .read{color:var(--primary-2);font-weight:700;display:inline-flex;align-items:center;gap:6px;transition:transform 250ms var(--ease)}
.news-card:hover .card-meta .read{transform:translateX(4px)}

/* ---------- CTA ---------- */
.cta-band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(135deg,rgba(43,108,246,.18),rgba(124,92,255,.1));
}
.cta-inner{padding:72px 0;display:grid;grid-template-columns:1.5fr 1fr;gap:32px;align-items:center}
.cta-inner h2{font-size:30px;line-height:1.35}
.cta-inner .lead{margin-top:14px;font-size:15.5px;color:var(--t2);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-note{margin-top:14px;font-size:13px;color:var(--t3);text-align:right}

/* ---------- 返回双入口 ---------- */
.back-links{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--line);padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--t2);max-width:340px;line-height:1.85}
.footer-col h3{font-size:15px;color:var(--t1);margin-bottom:16px;font-weight:700}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:11px}
.footer-col a{
  font-size:14px;color:var(--t2);padding-bottom:2px;border-bottom:2px solid transparent;
  transition:color 200ms var(--ease),border-color 200ms var(--ease);
}
.footer-col a:hover{color:var(--t1);border-bottom-color:var(--primary)}
.footer-bottom{
  margin-top:52px;padding:22px 0 28px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:var(--t3);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:70;
  display:inline-flex;align-items:center;gap:10px;
  height:52px;padding:0 22px;border-radius:999px;
  background:linear-gradient(135deg,#2B6CF6,#4C8DFF);color:#fff;
  font-size:15px;font-weight:700;
  box-shadow:0 18px 42px rgba(43,108,246,.45);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity 300ms var(--ease),transform 300ms var(--ease),box-shadow 220ms var(--ease);
}
.float-cta svg{width:18px;height:18px}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-cta:hover{box-shadow:0 0 40px rgba(43,108,246,.7)}

/* ---------- 动效 ---------- */
html.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity 480ms var(--ease),transform 480ms var(--ease)}
html.js [data-reveal].is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  html.js [data-reveal]{opacity:1;transform:none}
}

/* ---------- 断点 ---------- */
@media (min-width:1024px){
  .toc{
    display:block;max-width:760px;margin:44px auto 0;
    background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);
    padding:6px 22px 8px;box-shadow:var(--shadow-card);
  }
}
@media (max-width:1279px){
  .article-hero h1{font-size:40px}
  .section{padding:84px 0}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .article-hero h1{font-size:34px}
  .section{padding:72px 0}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:1fr;gap:26px}
  .cta-actions{justify-content:flex-start}
  .cta-note{text-align:left}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .nav-actions .btn-primary{display:none}
  .article-hero{padding:16px 0 34px}
  .article-hero h1{font-size:29px;line-height:1.32}
  .crumbs{padding-top:16px}
  .crumbs .current{max-width:58vw}
  .meta-row{gap:8px 16px;font-size:13px}
  .article-body{padding-top:36px;font-size:15.5px}
  .article-body h2{font-size:20px;margin-top:32px}
  .article-body h3{font-size:17px}
  .section{padding:48px 0}
  .section-title{font-size:24px}
  .card-grid{grid-template-columns:1fr}
  .cta-inner{padding:48px 0}
  .cta-inner h2{font-size:23px}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px}
  .float-cta{
    left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));
    justify-content:center;height:52px;padding:0 18px;
  }
  .article-cta{flex-direction:column;align-items:stretch;text-align:center}
  .article-cta .btn{width:100%}
}
@media (max-width:480px){
  .article-hero h1{font-size:26px}
  .brand-text{font-size:15.5px}
  .brand-text em{font-size:11.5px;margin-left:4px;padding:2px 6px}
  .section-title{font-size:22px}
}

/* roulang page: category1 */
:root{
  --bg-base:#060A12;
  --bg-deep:#0A1220;
  --bg-panel:#0F1A2C;
  --bg-input:#0B1424;
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(140,190,255,.16);
  --primary:#2B6CF6;
  --primary-lift:#4C8DFF;
  --cyan:#17C8C0;
  --violet:#7C5CFF;
  --warm:#FFB454;
  --t1:#EAF1FF;
  --t2:#A9B8CE;
  --t3:#6C7C94;
  --line:rgba(255,255,255,.08);
  --ok:#22C55E;
  --warn:#F59E0B;
  --err:#EF4444;
  --r-btn:12px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --sh-card:0 20px 60px rgba(0,0,0,.45);
  --sh-card-hi:0 26px 70px rgba(0,0,0,.6);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec:96px;
  --font:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-base);
  color:var(--t1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(135deg,rgba(140,190,255,.12) 0 1px,transparent 1px);
  background-size:64px 64px,64px 64px,100% 100%;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{margin:0;font-weight:750;letter-spacing:-.01em;line-height:1.3;color:var(--t1);}
p{margin:0 0 1.2em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--violet);outline-offset:2px;}
::selection{background:rgba(43,108,246,.4);color:#fff;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:650;letter-spacing:.02em;cursor:pointer;
  border:1px solid transparent;transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-lift));
  color:#fff;box-shadow:0 10px 30px rgba(43,108,246,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(43,108,246,.6);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{
  background:transparent;border-color:var(--glass-line);color:var(--t1);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}
.btn-line{
  background:transparent;border:0;padding:0 0 4px;min-height:auto;color:var(--t2);
  border-bottom:1px solid rgba(169,184,206,.4);border-radius:0;
}
.btn-line:hover{color:var(--t1);border-bottom-color:var(--t1);}
.btn-sm{min-height:42px;padding:0 20px;font-size:14px;}
.btn-block{width:100%;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:90;
  height:74px;
  background:rgba(6,10,18,.72);
  backdrop-filter:blur(14px) saturate(130%);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),height .3s var(--ease);
}
.site-header.is-scrolled{background:rgba(8,14,26,.86);border-bottom-color:var(--line);height:68px;}
.nav-wrap{display:flex;align-items:center;gap:24px;height:100%;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex-shrink:0;
  background:linear-gradient(135deg,var(--primary),#1B4FD0);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 8px 22px rgba(43,108,246,.36);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{font-size:17px;font-weight:750;letter-spacing:.02em;color:var(--t1);}
.brand-text em{font-style:normal;color:var(--cyan);}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:14px;}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 14px;border-radius:11px;font-size:15px;color:var(--t2);
  border:1px solid transparent;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.nav-link svg{width:16px;height:16px;opacity:.75;}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.06);}
.nav-link.is-active{color:var(--t1);background:rgba(43,108,246,.16);border-color:rgba(43,108,246,.42);}
.nav-link.is-active svg{opacity:1;color:var(--cyan);}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid var(--glass-line);
  position:relative;cursor:pointer;
}
.nav-toggle span,.nav-toggle::before,.nav-toggle::after{
  content:"";position:absolute;left:12px;right:12px;height:2px;border-radius:2px;
  background:var(--t1);transition:transform .28s var(--ease),opacity .2s var(--ease);
}
.nav-toggle span{top:21px;}
.nav-toggle::before{top:15px;}
.nav-toggle::after{top:27px;}
.nav-toggle.is-open span{opacity:0;}
.nav-toggle.is-open::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle.is-open::after{transform:translateY(-6px) rotate(-45deg);}
.drawer-cta{display:none;}

/* ---------- 面包屑 ---------- */
.breadcrumb{padding:112px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--t3);}
.breadcrumb a{color:var(--t2);transition:color .2s var(--ease);}
.breadcrumb a:hover{color:var(--t1);text-decoration:underline;text-underline-offset:4px;}
.breadcrumb li[aria-current]{color:var(--t1);}
.breadcrumb .sep{color:var(--t3);}

/* ---------- 分类头 ---------- */
.cat-hero{position:relative;padding:34px 0 0;}
.cat-hero-inner{
  position:relative;border-radius:24px;overflow:hidden;
  border:1px solid var(--line);background:var(--bg-deep);
}
.cat-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5;}
.cat-hero-mask{
  position:absolute;inset:0;
  background:
    radial-gradient(120% 100% at 12% 8%,rgba(43,108,246,.34) 0%,rgba(6,10,18,.9) 62%),
    linear-gradient(180deg,rgba(6,10,18,.66),rgba(6,10,18,.94));
}
.cat-hero-grid{
  position:relative;display:grid;grid-template-columns:7fr 5fr;gap:36px;
  padding:52px 44px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.24em;color:var(--t3);text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--cyan);display:block;}
.cat-hero h1{font-size:42px;line-height:1.24;}
.cat-hero h1 .hl{color:var(--cyan);}
.cat-hero-sub{margin-top:16px;font-size:16px;color:var(--t2);max-width:560px;}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
.cat-hero-note{margin-top:16px;font-size:14px;color:var(--t3);}
.glass-card{
  background:var(--glass);
  border:1px solid var(--glass-line);
  border-radius:var(--r-card);
  backdrop-filter:blur(18px) saturate(130%);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  padding:26px;
  box-shadow:var(--sh-card);
}
.glass-card h2{font-size:18px;margin-bottom:18px;}
.stat-row{display:flex;flex-direction:column;gap:14px;}
.stat{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding-bottom:12px;border-bottom:1px solid var(--line);}
.stat:last-child{border-bottom:0;padding-bottom:0;}
.stat-label{font-size:14px;color:var(--t2);}
.stat-value{font-size:20px;font-weight:700;color:var(--cyan);font-variant-numeric:tabular-nums;}
.glass-card .tip{margin-top:18px;font-size:13px;color:var(--t3);line-height:1.7;}

/* ---------- 板块 ---------- */
main{display:block;}
.section{padding:var(--sec) 0 0;}
.section:last-of-type{padding-bottom:var(--sec);}
.section-head{max-width:760px;margin-bottom:44px;}
.sec-num{
  display:block;font-size:14px;letter-spacing:.3em;color:var(--t3);margin-bottom:14px;
}
.section-head h2{font-size:31px;}
.section-head p{margin-top:16px;color:var(--t2);font-size:16px;}
.rule{height:1px;background:linear-gradient(90deg,rgba(255,255,255,.08),rgba(255,255,255,0));margin-top:var(--sec);}
.section .rule{margin-top:0;}

/* ---------- 卡片 ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{
  background:var(--bg-panel);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-card-hi);border-color:rgba(140,190,255,.32);}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-deep);}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.card:hover .card-media img{transform:scale(1.03);}
.card-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,10,18,0),rgba(6,10,18,.55));}
.card-body{padding:26px;}
.card-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12.5px;letter-spacing:.12em;color:var(--cyan);
  border:1px solid rgba(23,200,192,.42);border-radius:var(--r-pill);
  padding:4px 12px;margin-bottom:14px;
}
.card-body h3{font-size:21px;margin-bottom:12px;}
.card-body p{color:var(--t2);font-size:15.5px;margin-bottom:0;}
.mini-list{margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.mini-list li{position:relative;padding-left:18px;font-size:14.5px;color:var(--t2);}
.mini-list li::before{content:"";position:absolute;left:0;top:.72em;width:7px;height:1px;background:var(--cyan);}
.card-offset{margin-top:38px;}
.sm-card .card-body{padding:24px;}
.sm-card h3{font-size:18px;}
.sm-card .idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;margin-bottom:14px;
  background:rgba(43,108,246,.16);border:1px solid rgba(43,108,246,.36);
  color:var(--cyan);font-size:14px;font-weight:700;
}

/* ---------- 时间线 ---------- */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.timeline::before{
  content:"";position:absolute;left:0;right:0;top:20px;height:1px;
  background:linear-gradient(90deg,rgba(140,190,255,.34),rgba(140,190,255,.06));
}
.tl-item{position:relative;padding-top:54px;}
.tl-num{
  position:absolute;top:0;left:0;
  width:42px;height:42px;border-radius:14px;
  background:var(--bg-deep);border:1px solid var(--glass-line);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:var(--cyan);
}
.tl-item h3{font-size:18px;margin-bottom:10px;}
.tl-item p{font-size:14.5px;color:var(--t2);margin-bottom:0;}

/* ---------- 数据带 ---------- */
.band{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  background:var(--bg-deep);border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px 32px;
}
.band-item{padding-right:22px;border-right:1px solid var(--line);}
.band-item:last-child{border-right:0;padding-right:0;}
.band-item .k{font-size:14px;color:var(--t3);letter-spacing:.08em;}
.band-item .v{margin-top:8px;font-size:19px;font-weight:700;color:var(--cyan);}
.band-item .d{margin-top:8px;font-size:14px;color:var(--t2);}

/* ---------- 清单区 ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 24px;}
.check-list li{position:relative;padding-left:28px;color:var(--t2);font-size:15.5px;}
.check-list li::before{
  content:"";position:absolute;left:0;top:.85em;width:14px;height:8px;
  border-left:2px solid var(--cyan);border-bottom:2px solid var(--cyan);
  transform:rotate(-45deg);
}

/* ---------- FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{
  background:var(--bg-panel);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color .25s var(--ease);
}
.faq-item.is-open{border-color:rgba(140,190,255,.34);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;background:transparent;border:0;cursor:pointer;text-align:left;
  color:var(--t1);font-size:17px;font-weight:650;line-height:1.6;
}
.faq-q:hover{color:#fff;}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:9px;
  border:1px solid var(--glass-line);position:relative;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--t2);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.faq-icon::before{left:6px;right:6px;top:12px;height:1.6px;}
.faq-icon::after{top:6px;bottom:6px;left:12px;width:1.6px;}
.faq-item.is-open .faq-icon::after{transform:scaleY(0);opacity:0;}
.faq-item.is-open .faq-icon{border-color:rgba(23,200,192,.45);background:rgba(23,200,192,.1);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .26s var(--ease);
}
.faq-a-inner{padding:0 26px 24px;color:var(--t2);font-size:15.5px;}

/* ---------- 互链 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rel-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--bg-deep);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;transition:transform .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(140,190,255,.32);background:var(--bg-panel);}
.rel-card h3{font-size:18px;}
.rel-card p{font-size:14.5px;color:var(--t2);margin:0;}
.rel-card .go{font-size:14px;color:var(--cyan);letter-spacing:.08em;}

/* ---------- CTA 带 ---------- */
.cta-band{
  margin-top:var(--sec);
  border-radius:24px;
  border:1px solid rgba(43,108,246,.34);
  background:
    radial-gradient(90% 140% at 8% 0%,rgba(43,108,246,.34),rgba(10,18,32,.2) 60%),
    var(--bg-deep);
  padding:52px 44px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:28px;}
.cta-band p{margin-top:12px;color:var(--t2);font-size:15.5px;max-width:620px;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--sec);
  border-top:1px solid var(--line);
  background:var(--bg-deep);
  padding:64px 0 30px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand p{margin-top:18px;color:var(--t2);font-size:14.5px;max-width:380px;}
.footer-col h3{font-size:15px;margin-bottom:16px;letter-spacing:.06em;color:var(--t1);}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{font-size:14.5px;color:var(--t2);transition:color .2s var(--ease);}
.footer-col a:hover{color:var(--t1);text-decoration:underline;text-decoration-thickness:2px;text-underline-offset:4px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:var(--t3);
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:80;
  display:inline-flex;align-items:center;gap:9px;
  padding:13px 22px;border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(18px) saturate(130%);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  color:var(--t1);font-size:15px;font-weight:620;
  box-shadow:0 18px 44px rgba(0,0,0,.5);
  opacity:0;transform:translateY(14px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease),box-shadow .25s var(--ease);
}
.float-cta.is-show{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta:hover{box-shadow:0 0 34px rgba(43,108,246,.55);}
.float-cta svg{width:17px;height:17px;color:var(--cyan);}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  :root{--sec:80px;}
  .cat-hero h1{font-size:38px;}
}
@media (max-width:1023px){
  :root{--sec:72px;}
  .nav-toggle{display:block;}
  .nav-actions .btn-primary{display:none;}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);
    background:rgba(8,14,26,.97);
    backdrop-filter:blur(18px);
    border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:8px;
    padding:96px 22px 120px;margin-left:0;
    transform:translateX(104%);
    transition:transform .32s var(--ease);
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0);}
  .nav-link{font-size:16px;padding:14px 16px;border-radius:14px;justify-content:flex-start;}
  .drawer-cta{
    display:block;position:absolute;left:22px;right:22px;bottom:calc(22px + env(safe-area-inset-bottom));
  }
  .cat-hero-grid{grid-template-columns:1fr;gap:28px;padding:40px 30px;}
  .cat-hero h1{font-size:32px;}
  .grid-3{grid-template-columns:repeat(2,1fr);}
  .timeline{grid-template-columns:repeat(2,1fr);gap:28px 20px;}
  .timeline::before{display:none;}
  .band{grid-template-columns:1fr;gap:0;padding:26px;}
  .band-item{border-right:0;border-bottom:1px solid var(--line);padding:16px 0;}
  .band-item:last-child{border-bottom:0;padding-bottom:0;}
  .rel-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  :root{--sec:48px;}
  .container{padding:0 16px;}
  .breadcrumb{padding-top:100px;}
  .cat-hero-grid{padding:30px 20px;}
  .cat-hero h1{font-size:28px;line-height:1.3;}
  .cat-hero-sub{font-size:15px;}
  .section-head h2{font-size:24px;}
  .grid-2,.grid-3,.rel-grid,.check-list{grid-template-columns:1fr;}
  .card-offset{margin-top:0;}
  .timeline{grid-template-columns:1fr;}
  .cta-band{padding:34px 22px;flex-direction:column;align-items:flex-start;}
  .cta-band h2{font-size:22px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:10px;}
  .float-cta{
    left:0;right:0;bottom:0;justify-content:center;border-radius:0;
    padding:16px 20px calc(16px + env(safe-area-inset-bottom));
    font-size:16px;
  }
  .float-cta.is-show{transform:none;}
  .glass-card{padding:22px;}
  .brand-text{font-size:16px;}
}
@media (max-width:480px){
  .cat-hero h1{font-size:26px;}
  .card-body{padding:22px;}
  .btn{padding:0 20px;}
  .faq-q{font-size:16px;padding:18px 20px;}
  .faq-a-inner{padding:0 20px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.001ms !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg-base:#060A12;
  --bg-deep:#0A1220;
  --bg-panel:#0F1A2C;
  --bg-input:#0B1424;
  --glass:rgba(255,255,255,.045);
  --glass-line:rgba(140,190,255,.16);
  --primary:#2B6CF6;
  --primary-2:#4C8DFF;
  --cyan:#17C8C0;
  --violet:#7C5CFF;
  --warm:#FFB454;
  --t1:#EAF1FF;
  --t2:#A9B8CE;
  --t3:#6C7C94;
  --line:rgba(255,255,255,.08);
  --ok:#22C55E;
  --warn:#F59E0B;
  --err:#EF4444;
  --r-btn:12px;
  --r-card:18px;
  --r-img:14px;
  --r-pill:999px;
  --shadow-card:0 20px 60px rgba(0,0,0,.45);
  --shadow-hover:0 28px 70px rgba(0,0,0,.6);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sec:96px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background-color:var(--bg-base);
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:64px 64px,64px 64px;
  background-position:-1px -1px,-1px -1px;
  overflow-x:hidden;
  position:relative;
}
body::before{
  content:"";
  position:fixed;
  inset:0 0 auto 0;
  height:520px;
  background:
    linear-gradient(135deg,rgba(43,108,246,.20) 0%,rgba(124,92,255,.08) 42%,transparent 72%),
    radial-gradient(900px 380px at 78% -10%,rgba(23,200,192,.10),transparent 70%);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) .6px,transparent .6px);
  background-size:5px 5px;
  opacity:.35;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.3;color:var(--t1);}
h1{font-size:42px;line-height:1.25;}
h2{font-size:31px;line-height:1.32;}
h3{font-size:22px;font-weight:700;}
h4{font-size:18px;font-weight:700;}
p{margin:0 0 1.1em;}
p:last-child{margin-bottom:0;}
::selection{background:rgba(43,108,246,.4);color:#fff;}
:focus-visible{outline:2px solid var(--violet);outline-offset:2px;border-radius:6px;}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s var(--ease),border-color .22s var(--ease),color .22s var(--ease);
  border:1px solid transparent;
}
.btn-primary{
  background:linear-gradient(135deg,#2B6CF6,#4C8DFF);
  color:#fff;
  box-shadow:0 10px 26px rgba(43,108,246,.28);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 36px rgba(43,108,246,.6);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px rgba(43,108,246,.34);}
.btn-ghost{
  background:transparent;color:var(--t1);border-color:var(--glass-line);
}
.btn-ghost:hover{background:rgba(255,255,255,.06);border-color:rgba(140,190,255,.34);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:42px;padding:0 20px;font-size:14px;border-radius:10px;}
.btn-block{width:100%;}
.link-underline{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--cyan);
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.link-underline:hover{border-bottom-color:var(--cyan);}

/* ============ 头部导航 ============ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:72px;display:flex;align-items:center;
  transition:background .3s var(--ease),border-color .3s var(--ease),backdrop-filter .3s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-stuck{
  background:rgba(6,10,18,.78);
  border-bottom-color:var(--line);
  backdrop-filter:blur(18px) saturate(130%);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
}
.nav-wrap{display:flex;align-items:center;gap:28px;width:100%;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand-mark{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,#2B6CF6,#7C5CFF);
  box-shadow:0 8px 22px rgba(43,108,246,.42);
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--t1);}
.brand-text em{font-style:normal;color:var(--cyan);font-weight:800;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{
  display:inline-flex;align-items:center;gap:7px;
  padding:10px 14px;border-radius:10px;
  font-size:15px;font-weight:600;color:var(--t2);
  border:1px solid transparent;
  transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
}
.nav-link svg{width:16px;height:16px;opacity:.85;}
.nav-link:hover{color:var(--t1);background:rgba(255,255,255,.055);}
.nav-link.is-active{
  color:var(--t1);
  background:rgba(43,108,246,.14);
  border-color:rgba(140,190,255,.26);
}
.nav-link.is-active svg{color:var(--cyan);opacity:1;}
.nav-actions{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:11px;
  border:1px solid var(--glass-line);background:rgba(255,255,255,.04);
  position:relative;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  position:absolute;left:50%;transform:translateX(-50%);
  width:19px;height:2px;border-radius:2px;background:var(--t1);
  transition:transform .25s var(--ease),opacity .25s var(--ease);
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.nav-toggle.is-open span{background:transparent;}
.nav-toggle.is-open span::before{transform:rotate(45deg);top:0;}
.nav-toggle.is-open span::after{transform:rotate(-45deg);top:0;}

/* 移动抽屉 */
.nav-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:70;
  background:linear-gradient(180deg,#0A1220,#060A12);
  border-left:1px solid var(--line);
  transform:translateX(103%);
  transition:transform .34s var(--ease);
  display:flex;flex-direction:column;
  padding:22px 22px calc(22px + env(safe-area-inset-bottom));
  box-shadow:-30px 0 70px rgba(0,0,0,.6);
}
.nav-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px;}
.drawer-close{width:42px;height:42px;border-radius:10px;border:1px solid var(--glass-line);color:var(--t1);font-size:20px;line-height:1;}
.drawer-links{display:flex;flex-direction:column;gap:8px;}
.drawer-links a{
  display:flex;align-items:center;gap:10px;
  padding:14px 16px;border-radius:12px;
  font-size:16px;font-weight:600;color:var(--t2);
  border:1px solid transparent;
}
.drawer-links a.is-active{color:var(--t1);background:rgba(43,108,246,.15);border-color:rgba(140,190,255,.26);}
.drawer-links a:hover{background:rgba(255,255,255,.05);color:var(--t1);}
.drawer-foot{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);}
.drawer-mask{
  position:fixed;inset:0;z-index:65;background:rgba(4,7,13,.66);
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s var(--ease);
  backdrop-filter:blur(3px);
}
.drawer-mask.is-open{opacity:1;visibility:visible;}

/* ============ 面包屑 ============ */
.crumb{padding:112px 0 0;}
.crumb-list{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--t3);flex-wrap:wrap;}
.crumb-list a{color:var(--t2);}
.crumb-list a:hover{color:var(--t1);}
.crumb-sep{color:var(--t3);opacity:.7;}
.crumb-current{color:var(--t1);font-weight:600;}

/* ============ 分类信息头 ============ */
.cat-head{padding:26px 0 0;}
.cat-hero{
  position:relative;overflow:hidden;border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--bg-deep);
  box-shadow:var(--shadow-card);
  min-height:330px;
  display:flex;align-items:flex-end;
}
.cat-hero-media{
  position:absolute;inset:0;
  background-image:url("/assets/images/coverpic/cover-3.webp");
  background-size:cover;background-position:center;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,10,18,.94) 6%,rgba(6,10,18,.78) 48%,rgba(6,10,18,.42) 100%);
}
.cat-hero-inner{position:relative;z-index:2;padding:44px 42px;max-width:820px;}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--cyan);border:1px solid rgba(23,200,192,.4);
  background:rgba(23,200,192,.08);
}
.pill-muted{color:var(--t2);border-color:var(--glass-line);background:rgba(255,255,255,.04);}
.cat-hero h1{font-size:40px;margin-bottom:16px;}
.cat-hero h1 span{color:var(--cyan);}
.cat-hero p{color:var(--t2);font-size:16px;max-width:700px;}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}

/* ============ 双栏区域 ============ */
.section{padding:var(--sec) 0 0;}
.section-head{margin-bottom:34px;}
.sec-index{
  display:block;font-size:13.5px;letter-spacing:.3em;color:var(--t3);
  margin-bottom:12px;font-weight:600;
}
.section-head h2{max-width:820px;}
.section-head p{color:var(--t2);margin-top:14px;max-width:760px;}
.hairline{
  height:1px;margin:var(--sec) 0 0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.12) 18%,rgba(255,255,255,.12) 82%,transparent);
}
.split{display:grid;grid-template-columns:8fr 4fr;gap:32px;align-items:start;}

/* 左栏内容卡 */
.feature-list{display:flex;flex-direction:column;gap:20px;}
.feature-card{
  display:grid;grid-template-columns:64px 1fr;gap:22px;
  padding:26px;border-radius:var(--r-card);
  background:var(--bg-panel);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.feature-card:hover{transform:translateY(-4px);border-color:rgba(140,190,255,.28);box-shadow:var(--shadow-hover);}
.feature-ico{
  width:64px;height:64px;border-radius:16px;display:grid;place-items:center;
  background:linear-gradient(145deg,rgba(43,108,246,.24),rgba(124,92,255,.14));
  border:1px solid rgba(140,190,255,.24);
}
.feature-ico svg{width:28px;height:28px;stroke:var(--cyan);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.feature-card h3{margin-bottom:10px;}
.feature-card p{color:var(--t2);font-size:15.5px;}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tag{
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--t2);
  background:rgba(255,255,255,.045);
  border:1px solid var(--line);
}
.tag-cyan{color:var(--cyan);border-color:rgba(23,200,192,.32);}

/* 右栏侧边 */
.sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--bg-deep);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--shadow-card);
}
.side-card h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--primary);}
.side-links{display:flex;flex-direction:column;gap:4px;}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 13px;border-radius:10px;font-size:14.5px;color:var(--t2);
  border:1px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.side-links a:hover{background:rgba(255,255,255,.055);color:var(--t1);border-color:var(--glass-line);}
.side-links a span{color:var(--t3);font-size:13px;}
.side-points{display:flex;flex-direction:column;gap:12px;}
.side-points li{display:flex;gap:10px;font-size:14.5px;color:var(--t2);line-height:1.75;}
.side-points li::before{
  content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;
  background:var(--cyan);margin-top:9px;box-shadow:0 0 10px rgba(23,200,192,.7);
}
.side-cta{
  background:var(--glass);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(18px) saturate(130%);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
}
.side-cta p{font-size:14.5px;color:var(--t2);margin-bottom:18px;}
.side-note{font-size:12.5px;color:var(--t3);margin-top:12px;}

/* ============ 数据条 ============ */
.stat-bar{
  display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:20px;
}
.stat{
  padding:20px;border-radius:14px;background:var(--bg-panel);
  border:1px solid var(--line);
}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--cyan);letter-spacing:-.01em;}
.stat span{font-size:13px;color:var(--t3);}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--bg-panel);
  margin-bottom:16px;
  overflow:hidden;
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.faq-item.is-open{border-color:rgba(140,190,255,.3);box-shadow:var(--shadow-card);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 26px;text-align:left;color:var(--t1);
}
.faq-q h3{font-size:18px;font-weight:700;}
.faq-mark{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  display:grid;place-items:center;font-size:16px;color:var(--cyan);
  border:1px solid rgba(23,200,192,.35);
  transition:transform .26s var(--ease),background .26s var(--ease);
}
.faq-item.is-open .faq-mark{transform:rotate(45deg);background:rgba(23,200,192,.12);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .26s var(--ease);
}
.faq-a p{padding:0 26px 24px;color:var(--t2);font-size:15.5px;}

/* ============ 互链 ============ */
.cross-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cross-card{
  display:flex;flex-direction:column;gap:10px;
  padding:24px;border-radius:var(--r-card);
  background:var(--bg-panel);border:1px solid var(--line);
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.cross-card:hover{transform:translateY(-4px);border-color:rgba(140,190,255,.3);box-shadow:var(--shadow-hover);}
.cross-card h3{font-size:17.5px;}
.cross-card p{font-size:14.5px;color:var(--t2);margin:0;}
.cross-card .link-underline{margin-top:auto;font-size:14px;}

/* ============ 通栏 CTA ============ */
.cta-band{
  margin-top:var(--sec);
  border-radius:22px;
  border:1px solid var(--glass-line);
  background:
    linear-gradient(120deg,rgba(43,108,246,.20),rgba(124,92,255,.12) 55%,rgba(23,200,192,.10)),
    var(--bg-deep);
  padding:52px 44px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;
  box-shadow:var(--shadow-card);
}
.cta-band h2{font-size:28px;margin-bottom:10px;}
.cta-band p{color:var(--t2);max-width:560px;margin:0;}
.cta-band-actions{display:flex;flex-wrap:wrap;gap:14px;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:var(--sec);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(10,18,32,.7),rgba(6,10,18,.95));
  padding:64px 0 28px;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand p{color:var(--t2);font-size:14.5px;max-width:380px;}
.footer-col h3{font-size:15px;color:var(--t1);margin-bottom:16px;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  font-size:14.5px;color:var(--t2);
  display:inline-block;border-bottom:2px solid transparent;padding-bottom:2px;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-col a:hover{color:var(--t1);border-bottom-color:var(--primary);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--t3);
}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;right:28px;bottom:28px;z-index:55;
  display:inline-flex;align-items:center;gap:9px;
  height:52px;padding:0 24px;border-radius:var(--r-pill);
  background:var(--glass);
  border:1px solid var(--glass-line);
  backdrop-filter:blur(18px) saturate(130%);
  -webkit-backdrop-filter:blur(18px) saturate(130%);
  color:var(--t1);font-weight:700;font-size:14.5px;
  box-shadow:0 18px 44px rgba(0,0,0,.5);
  opacity:0;visibility:hidden;transform:translateY(14px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s var(--ease),box-shadow .25s var(--ease);
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{box-shadow:0 0 36px rgba(43,108,246,.55);}
.float-cta svg{width:18px;height:18px;stroke:var(--cyan);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* ============ 进入视口动画 ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  h1{font-size:38px;}
  .cat-hero h1{font-size:36px;}
  .split{grid-template-columns:1fr;gap:28px;}
  .sidebar{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:1023px){
  :root{--sec:72px;}
  .nav-links{display:none;}
  .nav-toggle{display:block;}
  .nav-wrap{gap:16px;}
  .cross-grid{grid-template-columns:repeat(2,1fr);}
  .cat-hero-inner{padding:36px 30px;}
  .cta-band{padding:40px 30px;}
}
@media (max-width:767px){
  :root{--sec:48px;}
  .container{padding:0 16px;}
  h1{font-size:28px;line-height:1.3;}
  h2{font-size:24px;}
  h3{font-size:19px;}
  body{font-size:15.5px;}
  .crumb{padding-top:96px;}
  .cat-hero{min-height:0;}
  .cat-hero-inner{padding:30px 22px;}
  .cat-hero h1{font-size:27px;}
  .feature-card{grid-template-columns:1fr;gap:16px;padding:22px;}
  .feature-ico{width:52px;height:52px;border-radius:14px;}
  .stat-bar{grid-template-columns:1fr;}
  .cross-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .cta-band{padding:32px 22px;border-radius:18px;}
  .cta-band-actions .btn{width:100%;}
  .float-cta{
    left:0;right:0;bottom:0;border-radius:0;
    height:56px;justify-content:center;
    padding:0 16px calc(0px + env(safe-area-inset-bottom));
    border-left:none;border-right:none;border-bottom:none;
    background:linear-gradient(135deg,#2B6CF6,#4C8DFF);
    color:#fff;
  }
  .float-cta svg{stroke:#fff;}
  .site-footer{padding-bottom:80px;}
  .faq-q{padding:18px 20px;}
  .faq-a p{padding:0 20px 20px;}
  .nav-actions .btn-sm{display:none;}
}
@media (max-width:480px){
  .brand-text{font-size:16px;}
  .cat-hero-actions .btn{width:100%;}
  .side-card{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}