/* roulang page: index */
:root{
  --bg:#060b16;
  --bg-2:#0a1224;
  --panel:rgba(255,255,255,.05);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(110,160,255,.18);
  --line-strong:rgba(63,224,255,.45);
  --primary:#2f7bff;
  --primary-2:#3fe0ff;
  --text:#e9efff;
  --muted:#93a4c6;
  --muted-2:#71809e;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 45px rgba(3,8,20,.55);
  --glow:0 0 24px rgba(63,224,255,.32);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.78;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(760px 420px at 12% -6%,rgba(47,123,255,.22),transparent 65%),
    radial-gradient(680px 380px at 88% 4%,rgba(63,224,255,.14),transparent 62%),
    radial-gradient(900px 520px at 50% 108%,rgba(47,123,255,.12),transparent 70%);
  pointer-events:none;
  z-index:0;
}
a{color:inherit;text-decoration:none;transition:color .22s ease}
a:hover{color:#8fe4ff}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4{margin:0;line-height:1.35;font-weight:700;letter-spacing:.01em}
p{margin:0}
ul,ol{margin:0}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary-2);outline-offset:3px;border-radius:6px}

.site-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;position:relative;z-index:1}
.section{padding:66px 0;position:relative}
.section-alt{
  background:linear-gradient(180deg,rgba(11,19,38,.92),rgba(6,11,22,.55));
  border-top:1px solid rgba(110,160,255,.09);
  border-bottom:1px solid rgba(110,160,255,.09);
}
.section-head{margin-bottom:30px;max-width:820px}
.section-head h2{font-size:clamp(22px,2.4vw,30px);margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15px}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  color:#6fd6ff;
  margin-bottom:10px;
  text-transform:uppercase;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,11,22,.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:14px;
  padding-bottom:12px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:13px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  display:grid;place-items:center;
  color:#04101f;font-weight:800;font-size:15px;
  box-shadow:var(--glow);
}
.brand-name{font-size:18px;font-weight:700;color:#fff;line-height:1.2}
.brand-sub{display:block;font-size:11px;color:var(--muted-2);font-weight:400;letter-spacing:.08em;margin-top:3px}
.nav-download{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 20px;border-radius:999px;
  background:linear-gradient(135deg,rgba(47,123,255,.95),rgba(63,224,255,.9));
  color:#04101f;font-weight:700;font-size:14px;
  box-shadow:0 8px 22px rgba(47,123,255,.32),0 0 18px rgba(63,224,255,.28);
  transition:transform .22s ease,box-shadow .22s ease;
  white-space:nowrap;
}
.nav-download:hover{transform:translateY(-2px);color:#04101f;box-shadow:0 12px 28px rgba(47,123,255,.42),0 0 24px rgba(63,224,255,.4)}
.nav-chips-wrap{position:relative}
.nav-chips-wrap::after{
  content:"";position:absolute;right:0;top:0;bottom:12px;width:44px;
  background:linear-gradient(90deg,rgba(6,11,22,0),rgba(6,11,22,.95));
  pointer-events:none;
}
.nav-chips{
  display:flex;gap:10px;
  overflow-x:auto;
  padding:2px 44px 14px 0;
  scrollbar-width:none;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;
  padding:8px 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--muted);
  font-size:14px;
  white-space:nowrap;
  transition:all .22s ease;
}
.chip:hover{color:#fff;border-color:var(--line-strong);box-shadow:0 0 16px rgba(63,224,255,.22)}
.chip.is-active{
  background:linear-gradient(135deg,rgba(47,123,255,.95),rgba(63,224,255,.88));
  color:#04101f;font-weight:700;border-color:transparent;
  box-shadow:0 6px 18px rgba(47,123,255,.3);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#04101f;
  box-shadow:0 12px 30px rgba(47,123,255,.34),0 0 22px rgba(63,224,255,.3);
}
.btn-primary:hover{transform:translateY(-2px);color:#04101f;box-shadow:0 16px 38px rgba(47,123,255,.45),0 0 30px rgba(63,224,255,.45)}
.btn-ghost{
  background:rgba(255,255,255,.045);
  border-color:var(--line);
  color:var(--text);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-strong);color:#fff;box-shadow:0 10px 26px rgba(47,123,255,.2)}
.btn-sm{padding:11px 22px;font-size:14px}

/* ---------- glass ---------- */
.glass{
  background:linear-gradient(160deg,rgba(255,255,255,.075),rgba(255,255,255,.025));
  border:1px solid var(--line);
  border-radius:var(--radius);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow);
}
.card{
  min-width:0;
  padding:26px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.022));
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(63,224,255,.38);box-shadow:0 22px 44px rgba(3,8,20,.6),0 0 26px rgba(63,224,255,.14)}
.card h3{font-size:17px;margin-bottom:10px;color:#fff}
.card p{color:var(--muted);font-size:14.5px}
.card-idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;
  background:rgba(63,224,255,.12);
  border:1px solid rgba(63,224,255,.32);
  color:#9ee9ff;font-size:13px;font-weight:700;
  margin-bottom:14px;
}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.grid-2>*,.grid-3>*,.grid-4>*{min-width:0}

/* ---------- hero ---------- */
.hero{padding:58px 0 66px;position:relative;overflow:hidden}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);
  gap:44px;
  align-items:start;
}
.badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 17px;border-radius:999px;
  border:1px solid rgba(63,224,255,.36);
  background:rgba(63,224,255,.1);
  color:#9ee9ff;font-size:13px;
}
.badge-dot{width:7px;height:7px;border-radius:50%;background:var(--primary-2);box-shadow:0 0 10px var(--primary-2)}
.hero h1{
  font-size:clamp(26px,3.3vw,40px);
  line-height:1.34;
  margin:20px 0 18px;
  letter-spacing:.005em;
}
.hero-lead{color:var(--muted);font-size:16px;max-width:640px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:28px 0 24px}
.hero-qualify{list-style:none;padding:0;display:grid;gap:10px;max-width:600px}
.hero-qualify li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--muted);
}
.hero-qualify li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;margin-top:9px;
  border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:0 0 10px rgba(63,224,255,.55);
}
.check-panel{padding:26px 24px}
.check-head{
  display:flex;align-items:center;gap:10px;
  font-size:14px;font-weight:700;color:#fff;
  padding-bottom:16px;margin-bottom:18px;
  border-bottom:1px solid var(--line);
}
.check-head .dot{width:9px;height:9px;border-radius:50%;background:var(--primary-2);box-shadow:0 0 12px var(--primary-2)}
.check-list{list-style:none;padding:0;display:grid;gap:14px}
.check-list li{display:grid;grid-template-columns:38px minmax(0,1fr);gap:12px;align-items:start}
.check-idx{
  font-size:12px;font-weight:800;color:#7fd6ff;
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  background:rgba(47,123,255,.14);
  border:1px solid rgba(63,224,255,.26);
}
.check-text{font-size:14px;color:var(--text)}
.check-text span{display:block;font-size:12.5px;color:var(--muted-2);margin-top:2px}
.check-bar{
  height:6px;border-radius:999px;
  background:linear-gradient(90deg,rgba(47,123,255,.9),rgba(63,224,255,.85),rgba(47,123,255,.2));
  margin:22px 0 14px;
  box-shadow:0 0 18px rgba(63,224,255,.35);
}
.check-note{font-size:13px;color:var(--muted);text-align:center}

/* ---------- quick entry ---------- */
.quick-bar{padding:22px 24px;display:grid;gap:16px}
.quick-title{font-size:14px;color:var(--muted);letter-spacing:.04em}
.quick-links{display:flex;flex-wrap:wrap;gap:12px}
.quick-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  font-size:14px;color:var(--text);
  transition:all .22s ease;
}
.quick-link:hover{border-color:var(--line-strong);color:#fff;box-shadow:0 0 18px rgba(63,224,255,.22);transform:translateY(-2px)}
.quick-link em{font-style:normal;color:#7fd6ff;font-size:12px}

/* ---------- steps ---------- */
.steps{display:grid;gap:16px}
.step{
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:18px;
  align-items:start;
  padding:22px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(150deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  transition:border-color .25s ease,transform .25s ease;
}
.step:hover{border-color:rgba(63,224,255,.36);transform:translateX(4px)}
.step-num{
  width:48px;height:48px;border-radius:14px;
  display:grid;place-items:center;
  font-weight:800;font-size:16px;color:#04101f;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  box-shadow:0 8px 22px rgba(47,123,255,.3);
}
.step h3{font-size:16.5px;margin-bottom:8px;color:#fff}
.step p{font-size:14.5px;color:var(--muted)}

/* ---------- download ---------- */
.download-box{
  padding:38px 32px;
  border-radius:24px;
  border:1px solid rgba(63,224,255,.26);
  background:
    radial-gradient(520px 240px at 8% 0%,rgba(47,123,255,.24),transparent 70%),
    radial-gradient(480px 220px at 92% 100%,rgba(63,224,255,.18),transparent 70%),
    linear-gradient(160deg,rgba(18,28,52,.95),rgba(8,14,28,.92));
  box-shadow:var(--shadow);
}
.download-head{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;justify-content:space-between;margin-bottom:26px}
.download-head h2{font-size:clamp(21px,2.3vw,28px);margin-bottom:10px}
.download-head p{color:var(--muted);font-size:14.5px;max-width:620px}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.dl-btn{
  display:flex;align-items:center;gap:14px;
  padding:18px 20px;
  border-radius:16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  transition:all .24s ease;
  min-width:0;
}
.dl-btn:hover{
  transform:translateY(-3px);
  border-color:rgba(63,224,255,.55);
  box-shadow:0 14px 32px rgba(47,123,255,.26),0 0 22px rgba(63,224,255,.2);
  color:#fff;
}
.dl-icon{
  flex:0 0 42px;width:42px;height:42px;border-radius:13px;
  display:grid;place-items:center;
  background:rgba(63,224,255,.12);
  border:1px solid rgba(63,224,255,.3);
  color:#9ee9ff;font-size:13px;font-weight:800;
}
.dl-text{min-width:0}
.dl-text strong{display:block;font-size:16px;color:#fff}
.dl-text span{display:block;font-size:12.5px;color:var(--muted-2);margin-top:2px}

/* ---------- category matrix ---------- */
.cat-feature{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:22px;
  align-items:stretch;
}
.cat-main{
  padding:32px 30px;
  border-radius:var(--radius);
  border:1px solid rgba(63,224,255,.28);
  background:linear-gradient(150deg,rgba(47,123,255,.2),rgba(63,224,255,.07) 60%,rgba(255,255,255,.03));
  display:flex;flex-direction:column;justify-content:space-between;gap:20px;
  min-width:0;
}
.cat-main h3{font-size:20px;color:#fff;margin-bottom:12px}
.cat-main p{color:#bcd0ee;font-size:14.5px}
.cat-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}
.cat-tag{font-size:12.5px;color:#9ee9ff;border:1px solid rgba(63,224,255,.3);background:rgba(63,224,255,.08);border-radius:999px;padding:4px 12px}
.cat-side{display:grid;gap:18px;min-width:0}
.cat-side .card{padding:22px}

/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.check-item{
  display:grid;grid-template-columns:34px minmax(0,1fr);gap:14px;
  padding:20px 22px;
  border-radius:16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  min-width:0;
}
.check-item b{font-size:15.5px;color:#fff;display:block;margin-bottom:6px}
.check-item p{font-size:14px;color:var(--muted)}
.check-item .n{
  width:32px;height:32px;border-radius:10px;
  display:grid;place-items:center;
  background:rgba(47,123,255,.16);
  border:1px solid rgba(63,224,255,.26);
  color:#9ee9ff;font-size:13px;font-weight:800;
}

/* ---------- cms list ---------- */
.news-layout{display:grid;grid-template-columns:minmax(0,1.62fr) minmax(0,1fr);gap:26px;align-items:start}
.post-card{
  padding:24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.065),rgba(255,255,255,.02));
  margin-bottom:16px;
  transition:border-color .24s ease,transform .24s ease;
  min-width:0;
}
.post-card:hover{border-color:rgba(63,224,255,.4);transform:translateY(-3px)}
.post-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12.5px;color:var(--muted-2);margin-bottom:10px}
.tag{
  display:inline-block;padding:2px 12px;border-radius:999px;
  background:rgba(47,123,255,.16);
  border:1px solid rgba(47,123,255,.32);
  color:#8fc0ff;font-size:12px;
}
.post-title{font-size:18px;margin-bottom:10px;color:#fff}
.post-title a:hover{color:#8fe4ff}
.post-summary{font-size:14px;color:var(--muted);margin-bottom:14px}
.post-more{font-size:13.5px;color:#6fd6ff;font-weight:600}
.post-more:hover{color:#a5ebff}
.side-panel{padding:24px;border-radius:var(--radius);min-width:0}
.side-panel h3{font-size:16px;margin-bottom:16px;color:#fff}
.side-list{list-style:none;padding:0;display:grid;gap:12px}
.side-list li{font-size:14px;color:var(--muted);display:flex;gap:10px;align-items:flex-start}
.side-list li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:10px;border-radius:50%;background:var(--primary-2);box-shadow:0 0 8px rgba(63,224,255,.6)}
.empty-note{
  padding:26px;border-radius:16px;border:1px dashed rgba(110,160,255,.3);
  color:var(--muted);font-size:14px;background:rgba(255,255,255,.03);
}

/* ---------- rank ---------- */
.rank-list{display:grid;gap:0}
.rank-item{
  display:grid;grid-template-columns:48px minmax(0,1fr);gap:16px;align-items:start;
  padding:16px 0;
  border-bottom:1px dashed rgba(110,160,255,.18);
  min-width:0;
}
.rank-item:last-child{border-bottom:0}
.rank-no{
  font-weight:800;font-size:18px;color:transparent;
  background:linear-gradient(135deg,var(--primary-2),#6f9bff);
  -webkit-background-clip:text;background-clip:text;
  line-height:1.5;
}
.rank-title{font-size:15.5px;color:var(--text);display:block;margin-bottom:4px}
.rank-title:hover{color:#8fe4ff}
.rank-desc{font-size:13px;color:var(--muted-2)}

/* ---------- metrics ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;text-align:center}
.metric{
  padding:26px 18px;border-radius:16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  min-width:0;
}
.metric-num{
  font-size:30px;font-weight:800;line-height:1.2;
  background:linear-gradient(135deg,var(--primary-2),#7f9dff);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.metric-label{font-size:13.5px;color:var(--muted);margin-top:8px}

/* ---------- faq ---------- */
.faq-item{
  border:1px solid var(--line);
  border-radius:14px;
  background:rgba(255,255,255,.04);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .24s ease;
}
.faq-item:hover{border-color:rgba(63,224,255,.32)}
.faq-item summary{
  cursor:pointer;
  padding:17px 22px;
  font-weight:600;
  font-size:15.5px;
  color:#fff;
  list-style:none;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--primary-2);font-size:20px;line-height:1;flex:0 0 auto}
.faq-item[open] summary::after{content:"−"}
.faq-body{padding:0 22px 18px;color:var(--muted);font-size:14.5px}

/* ---------- final cta ---------- */
.final-cta{
  text-align:center;
  padding:54px 32px;
  border-radius:26px;
  border:1px solid rgba(63,224,255,.26);
  background:
    radial-gradient(560px 260px at 50% 0%,rgba(47,123,255,.26),transparent 72%),
    linear-gradient(160deg,rgba(17,27,50,.95),rgba(8,14,28,.92));
  box-shadow:var(--shadow);
}
.final-cta h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:16px}
.final-cta p{color:var(--muted);font-size:15px;max-width:720px;margin:0 auto}
.final-cta .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:rgba(4,8,16,.92);
  padding:52px 0 26px;
  position:relative;z-index:1;
}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,.75fr));gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-desc{font-size:14px;color:var(--muted);max-width:400px}
.footer-col h4{font-size:14px;letter-spacing:.1em;color:#fff;margin-bottom:16px}
.footer-links{display:grid;gap:11px}
.footer-links a{font-size:14px;color:var(--muted)}
.footer-links a:hover{color:#8fe4ff}
.footer-bottom{
  border-top:1px solid rgba(110,160,255,.14);
  margin-top:34px;padding-top:18px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--muted-2);
}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-layout{grid-template-columns:1fr}
  .cat-feature{grid-template-columns:1fr}
  .metrics{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media screen and (max-width:768px){
  .section{padding:50px 0}
  .hero{padding:40px 0 50px}
  .download-box{padding:28px 22px}
  .download-grid{grid-template-columns:1fr}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .check-grid{grid-template-columns:1fr}
  .step{grid-template-columns:44px minmax(0,1fr);padding:18px 18px;gap:14px}
  .step-num{width:40px;height:40px;border-radius:12px;font-size:14px}
  .brand-name{font-size:16px}
  .brand-sub{font-size:10.5px}
  .final-cta{padding:38px 22px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media screen and (max-width:520px){
  .site-container{padding-left:16px;padding-right:16px}
  .header-top{padding-top:12px}
  .nav-download{padding:8px 16px;font-size:13px}
  .brand-mark{width:36px;height:36px;flex:0 0 36px;font-size:14px}
  .btn{width:100%;padding:13px 20px}
  .hero-actions{flex-direction:column}
  .final-cta .cta-actions{flex-direction:column}
  .metrics{grid-template-columns:1fr}
  .rank-item{grid-template-columns:38px minmax(0,1fr);gap:12px}
  .check-item{grid-template-columns:30px minmax(0,1fr);padding:16px 16px}
  .side-panel,.post-card{padding:18px}
}

/* roulang page: article */
:root{
  --bg:#060b16;
  --bg-2:#0a1224;
  --panel:rgba(255,255,255,.05);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(110,160,255,.18);
  --line-strong:rgba(63,224,255,.45);
  --primary:#2f7bff;
  --primary-2:#3fe0ff;
  --text:#e9efff;
  --muted:#93a4c6;
  --muted-2:#71809e;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 45px rgba(3,8,20,.55);
  --glow:0 0 24px rgba(63,224,255,.32);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.78;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(760px 420px at 12% -6%,rgba(47,123,255,.22),transparent 65%),
    radial-gradient(680px 380px at 88% 4%,rgba(63,224,255,.14),transparent 62%),
    radial-gradient(900px 520px at 50% 108%,rgba(47,123,255,.12),transparent 70%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .22s ease,border-color .22s ease}
a:hover{color:#8fe4ff}
h1,h2,h3,h4{margin:0 0 12px;line-height:1.35;color:#fff;font-weight:700}
p{margin:0 0 14px}
ul,ol{margin:0 0 16px;padding-left:20px}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--primary-2);outline-offset:3px}
.site-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;position:relative;z-index:1}
.section{padding:64px 0;position:relative}
.section-alt{
  background:linear-gradient(180deg,rgba(11,19,38,.92),rgba(6,11,22,.55));
  border-top:1px solid rgba(110,160,255,.09);
  border-bottom:1px solid rgba(110,160,255,.09);
}
.section-head{margin-bottom:28px;max-width:820px}
.section-head h2{font-size:clamp(21px,2.4vw,29px);margin-bottom:10px}
.section-head p{color:var(--muted);font-size:15px;margin:0}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  color:#6fd6ff;
  margin-bottom:10px;
  text-transform:uppercase;
}
/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,11,22,.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:14px;
  padding-bottom:12px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:13px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  display:grid;place-items:center;
  color:#04101f;font-weight:800;font-size:15px;
  box-shadow:var(--glow);
}
.brand-name{font-size:18px;font-weight:700;color:#fff;line-height:1.2;display:block}
.brand-sub{display:block;font-size:11px;color:var(--muted-2);font-weight:400;letter-spacing:.08em;margin-top:3px}
.nav-download{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 20px;border-radius:999px;
  background:linear-gradient(135deg,rgba(47,123,255,.95),rgba(63,224,255,.9));
  color:#04101f;font-weight:700;font-size:14px;
  box-shadow:0 8px 22px rgba(47,123,255,.32),0 0 18px rgba(63,224,255,.28);
  transition:transform .22s ease,box-shadow .22s ease;
  white-space:nowrap;
}
.nav-download:hover{transform:translateY(-2px);color:#04101f;box-shadow:0 12px 28px rgba(47,123,255,.42),0 0 24px rgba(63,224,255,.4)}
.nav-chips-wrap{position:relative}
.nav-chips-wrap::after{
  content:"";position:absolute;right:0;top:0;bottom:12px;width:44px;
  background:linear-gradient(90deg,rgba(6,11,22,0),rgba(6,11,22,.95));
  pointer-events:none;
}
.nav-chips{
  display:flex;gap:10px;
  overflow-x:auto;
  padding:2px 44px 14px 0;
  scrollbar-width:none;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;
  padding:8px 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--muted);
  font-size:14px;
  white-space:nowrap;
  transition:all .22s ease;
}
.chip:hover{color:#fff;border-color:var(--line-strong);box-shadow:0 0 16px rgba(63,224,255,.22)}
.chip.is-active{
  background:linear-gradient(135deg,rgba(47,123,255,.95),rgba(63,224,255,.88));
  color:#04101f;font-weight:700;border-color:transparent;
  box-shadow:0 6px 18px rgba(47,123,255,.3);
}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#04101f;
  box-shadow:0 12px 30px rgba(47,123,255,.34),0 0 22px rgba(63,224,255,.3);
}
.btn-primary:hover{transform:translateY(-2px);color:#04101f;box-shadow:0 16px 38px rgba(47,123,255,.45),0 0 30px rgba(63,224,255,.45)}
.btn-ghost{
  background:rgba(255,255,255,.045);
  border-color:var(--line);
  color:var(--text);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-strong);color:#fff;box-shadow:0 10px 26px rgba(47,123,255,.2)}
.btn-sm{padding:10px 20px;font-size:14px}
/* ---------- article head ---------- */
.article-head{
  padding:36px 0 26px;
  border-bottom:1px solid rgba(110,160,255,.12);
  background:radial-gradient(700px 300px at 8% 0%,rgba(47,123,255,.16),transparent 68%);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted-2);margin-bottom:16px;
}
.breadcrumb a{color:#9fb6dd}
.breadcrumb a:hover{color:#8fe4ff}
.breadcrumb span.sep{color:rgba(147,164,198,.5)}
.article-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;
  font-size:12.5px;color:#9ee9ff;
  border:1px solid rgba(63,224,255,.34);
  background:rgba(63,224,255,.1);
  margin-bottom:14px;
}
.article-title{
  font-size:clamp(23px,3vw,36px);
  line-height:1.4;
  letter-spacing:.01em;
  margin-bottom:16px;
  max-width:900px;
  overflow-wrap:break-word;
  word-break:normal;
}
.article-meta{
  display:flex;flex-wrap:wrap;gap:10px 22px;
  color:var(--muted);font-size:13.5px;
}
.article-meta span{display:inline-flex;align-items:center;gap:7px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--primary-2);box-shadow:0 0 10px rgba(63,224,255,.8);display:inline-block}
/* ---------- article layout ---------- */
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:34px;
  align-items:start;
  padding:44px 0 10px;
}
.article-layout>*{min-width:0}
.panel{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.022));
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
  padding:28px 26px;
}
.article-body{
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(165deg,rgba(255,255,255,.065),rgba(255,255,255,.018));
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow);
  padding:34px 32px;
  overflow-wrap:break-word;
}
.article-body h2{
  font-size:clamp(19px,2.1vw,24px);
  margin:34px 0 14px;
  padding-left:14px;
  border-left:3px solid var(--primary-2);
  line-height:1.5;
}
.article-body h2:first-child{margin-top:0}
.article-body h3{
  font-size:18px;margin:26px 0 10px;color:#cfe6ff;
}
.article-body p{color:#cfdaf0;font-size:16px;margin-bottom:16px}
.article-body ul,.article-body ol{color:#cfdaf0;padding-left:22px}
.article-body li{margin-bottom:9px}
.article-body strong{color:#fff;font-weight:700}
.article-body a{color:#7fd8ff;border-bottom:1px dashed rgba(127,216,255,.5)}
.article-body a:hover{color:#bdf0ff}
.article-body img{border-radius:var(--radius-sm);margin:18px 0;border:1px solid var(--line)}
.article-body blockquote{
  margin:20px 0;padding:16px 20px;
  border-left:3px solid rgba(63,224,255,.6);
  background:rgba(63,224,255,.07);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:#bcd7f4;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;border-collapse:collapse;margin:20px 0;font-size:14.5px;
  display:block;overflow-x:auto;
}
.article-body th,.article-body td{
  border:1px solid rgba(110,160,255,.2);
  padding:10px 14px;text-align:left;color:#cfdaf0;
}
.article-body th{background:rgba(47,123,255,.16);color:#fff;white-space:nowrap}
.article-body hr{border:0;border-top:1px solid rgba(110,160,255,.18);margin:26px 0}
.article-empty{text-align:left}
.article-empty h2{font-size:22px;margin-bottom:10px}
.article-empty p{color:var(--muted)}
/* ---------- sidebar ---------- */
.side-stack{display:grid;gap:18px}
.side-card{
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  padding:20px 20px 18px;
}
.side-card h3{font-size:15px;margin-bottom:12px;color:#dcebff;letter-spacing:.02em}
.info-list{list-style:none;margin:0;padding:0;font-size:13.5px}
.info-list li{
  display:flex;justify-content:space-between;gap:12px;
  padding:8px 0;border-bottom:1px dashed rgba(110,160,255,.14);
  color:var(--muted);
}
.info-list li:last-child{border-bottom:0;padding-bottom:0}
.info-list li b{color:#e6f1ff;font-weight:600;text-align:right}
.toc{list-style:none;margin:0;padding:0}
.toc li{margin-bottom:2px}
.toc a{
  display:block;padding:8px 10px;border-radius:9px;
  font-size:13.8px;color:#a9bdd9;
  border:1px solid transparent;
  transition:all .2s ease;
}
.toc a:hover{color:#fff;background:rgba(63,224,255,.08);border-color:rgba(63,224,255,.24)}
.side-download{
  border-radius:var(--radius-sm);
  border:1px solid rgba(63,224,255,.32);
  background:linear-gradient(150deg,rgba(47,123,255,.22),rgba(63,224,255,.1));
  padding:20px;
  box-shadow:0 0 24px rgba(63,224,255,.16);
}
.side-download h3{font-size:15px;margin-bottom:8px}
.side-download p{font-size:13px;color:#b9cbeb;margin-bottom:14px}
.side-download .btn{width:100%;padding:11px 14px;font-size:13.5px}
.side-download .btn + .btn{margin-top:10px}
/* ---------- risk / method ---------- */
.art-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.art-grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.art-grid-3>*,.art-grid-2>*{min-width:0}
.glass-card{
  min-width:0;
  padding:24px 22px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.022));
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.glass-card:hover{transform:translateY(-4px);border-color:rgba(63,224,255,.38);box-shadow:0 22px 44px rgba(3,8,20,.6),0 0 26px rgba(63,224,255,.14)}
.glass-card h3{font-size:16.5px;margin-bottom:10px}
.glass-card p{color:var(--muted);font-size:14.5px;margin:0}
.card-idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;
  background:rgba(63,224,255,.12);
  border:1px solid rgba(63,224,255,.32);
  color:#9ee9ff;font-size:13px;font-weight:700;
  margin-bottom:14px;
}
.check-list{list-style:none;margin:0;padding:0}
.check-list li{
  position:relative;
  padding:14px 16px 14px 46px;
  margin-bottom:12px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
  color:#cfdaf0;font-size:14.8px;
  transition:border-color .22s ease,background .22s ease;
}
.check-list li:hover{border-color:rgba(63,224,255,.34);background:rgba(63,224,255,.06)}
.check-list li::before{
  content:"";
  position:absolute;left:16px;top:19px;
  width:16px;height:16px;border-radius:5px;
  border:1px solid rgba(63,224,255,.6);
  background:rgba(63,224,255,.16);
  box-shadow:inset 0 0 8px rgba(63,224,255,.5);
}
.check-list li b{color:#fff}
.step-list{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.step-list li{
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:18px;
  padding:20px 22px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(47,123,255,.1),rgba(255,255,255,.02));
  transition:border-color .22s ease,transform .22s ease;
}
.step-list li:hover{border-color:rgba(63,224,255,.36);transform:translateX(3px)}
.step-num{
  font-size:19px;font-weight:800;color:#8fe4ff;
  letter-spacing:.02em;
  display:flex;align-items:flex-start;
}
.step-body h3{font-size:16px;margin-bottom:6px}
.step-body p{color:var(--muted);font-size:14.6px;margin:0}
/* ---------- metric strip ---------- */
.metric-strip{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;
}
.metric-strip>*{min-width:0}
.metric{
  padding:20px 18px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  text-align:left;
}
.metric b{display:block;font-size:19px;color:#9ee9ff;margin-bottom:6px;letter-spacing:.02em}
.metric span{font-size:13.5px;color:var(--muted);line-height:1.65;display:block}
/* ---------- details / faq ---------- */
.fold-list{display:grid;gap:12px}
.fold-item{
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
  overflow:hidden;
  transition:border-color .22s ease;
}
.fold-item[open]{border-color:rgba(63,224,255,.34);background:rgba(63,224,255,.05)}
.fold-item summary{
  cursor:pointer;
  list-style:none;
  padding:16px 20px;
  font-size:15.4px;font-weight:600;color:#e6f1ff;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.fold-item summary::-webkit-details-marker{display:none}
.fold-item summary::after{
  content:"+";
  flex:0 0 auto;
  width:24px;height:24px;border-radius:8px;
  display:grid;place-items:center;
  font-weight:700;font-size:15px;
  color:#9ee9ff;border:1px solid rgba(63,224,255,.34);
  background:rgba(63,224,255,.1);
  transition:transform .22s ease;
}
.fold-item[open] summary::after{content:"−";transform:rotate(180deg)}
.fold-body{padding:0 20px 18px;color:var(--muted);font-size:14.6px}
.fold-body p:last-child{margin-bottom:0}
/* ---------- download ---------- */
.download-band{
  border-radius:26px;
  border:1px solid rgba(63,224,255,.32);
  background:
    radial-gradient(620px 300px at 12% 0%,rgba(47,123,255,.34),transparent 66%),
    radial-gradient(520px 260px at 92% 100%,rgba(63,224,255,.2),transparent 70%),
    linear-gradient(160deg,rgba(12,22,44,.96),rgba(6,11,22,.94));
  box-shadow:0 26px 60px rgba(3,8,20,.6),0 0 40px rgba(63,224,255,.14);
  padding:38px 34px;
}
.download-head{max-width:760px;margin-bottom:26px}
.download-head h2{font-size:clamp(21px,2.5vw,28px);margin-bottom:10px}
.download-head p{color:var(--muted);font-size:14.8px;margin:0}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.download-grid>*{min-width:0}
.download-item{
  display:block;
  padding:22px 20px;
  border-radius:var(--radius);
  border:1px solid rgba(110,160,255,.26);
  background:rgba(255,255,255,.05);
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease,background .24s ease;
}
.download-item:hover{
  transform:translateY(-4px);
  border-color:rgba(63,224,255,.6);
  background:rgba(63,224,255,.09);
  box-shadow:0 18px 40px rgba(3,8,20,.55),0 0 26px rgba(63,224,255,.24);
  color:inherit;
}
.download-item .dl-platform{font-size:12.5px;letter-spacing:.14em;color:#7fd8ff;display:block;margin-bottom:8px}
.download-item .dl-name{font-size:17px;font-weight:700;color:#fff;display:block;margin-bottom:6px}
.download-item .dl-file{font-size:12.5px;color:var(--muted-2);word-break:break-word}
.download-note{
  margin-top:20px;font-size:13px;color:var(--muted-2);
  border-top:1px dashed rgba(110,160,255,.2);padding-top:16px;
}
/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.related-grid>*{min-width:0}
.related-item{
  display:block;
  padding:24px 22px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  transition:transform .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.related-item:hover{
  transform:translateY(-4px);
  border-color:rgba(63,224,255,.4);
  box-shadow:0 20px 44px rgba(3,8,20,.55),0 0 24px rgba(63,224,255,.14);
  color:inherit;
}
.related-item h3{font-size:16px;margin-bottom:8px}
.related-item p{font-size:14.2px;color:var(--muted);margin:0}
/* ---------- closing bar ---------- */
.closing-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;
  padding:28px 30px;
  border-radius:var(--radius);
  border:1px solid rgba(63,224,255,.3);
  background:linear-gradient(120deg,rgba(47,123,255,.2),rgba(63,224,255,.08));
  box-shadow:0 18px 40px rgba(3,8,20,.5);
}
.closing-bar h2{font-size:19px;margin-bottom:6px}
.closing-bar p{margin:0;color:#b9cbeb;font-size:14.4px}
/* ---------- footer ---------- */
.site-footer{
  margin-top:20px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,14,28,.9),rgba(4,8,16,.98));
  padding:46px 0 26px;
  position:relative;z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;
  padding-bottom:28px;
  border-bottom:1px solid rgba(110,160,255,.12);
}
.footer-grid>*{min-width:0}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.footer-desc{color:var(--muted);font-size:14px;max-width:420px;margin:0}
.footer-col h4{font-size:14.5px;margin-bottom:14px;color:#dcebff}
.footer-links{display:grid;gap:9px}
.footer-links a{color:var(--muted);font-size:14px}
.footer-links a:hover{color:#8fe4ff}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:20px;font-size:13px;color:var(--muted-2);
}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:24px}
  .art-grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .metric-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
}
@media (max-width:768px){
  body{font-size:15.5px;line-height:1.75}
  .section{padding:48px 0}
  .article-head{padding:26px 0 20px}
  .article-body{padding:24px 20px}
  .panel{padding:22px 18px}
  .art-grid-2{grid-template-columns:minmax(0,1fr)}
  .art-grid-3{grid-template-columns:minmax(0,1fr)}
  .download-band{padding:26px 20px;border-radius:20px}
  .step-list li{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px 16px}
  .step-num{font-size:17px}
  .closing-bar{padding:22px 20px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px}
  .brand-name{font-size:16px}
  .brand-sub{font-size:10.5px}
  .nav-download{padding:8px 16px;font-size:13px}
}
@media (max-width:520px){
  .site-container{padding-left:16px;padding-right:16px}
  .article-title{font-size:21px;line-height:1.45}
  .metric-strip{grid-template-columns:minmax(0,1fr)}
  .download-grid{grid-template-columns:minmax(0,1fr)}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .btn{width:100%}
  .article-meta{font-size:12.8px;gap:8px 16px}
  .header-top{flex-wrap:wrap;gap:10px}
  .check-list li{padding:12px 14px 12px 42px;font-size:14.2px}
  .check-list li::before{left:14px;top:17px}
}

/* roulang page: category1 */
:root{
  --bg:#060b16;
  --bg-2:#0a1224;
  --panel:rgba(255,255,255,.05);
  --panel-2:rgba(255,255,255,.075);
  --line:rgba(110,160,255,.18);
  --line-strong:rgba(63,224,255,.45);
  --primary:#2f7bff;
  --primary-2:#3fe0ff;
  --text:#e9efff;
  --muted:#93a4c6;
  --muted-2:#71809e;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 20px 45px rgba(3,8,20,.55);
  --glow:0 0 24px rgba(63,224,255,.32);
}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.78;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background:
    radial-gradient(760px 420px at 12% -6%,rgba(47,123,255,.22),transparent 65%),
    radial-gradient(680px 380px at 88% 4%,rgba(63,224,255,.14),transparent 62%),
    radial-gradient(900px 520px at 50% 108%,rgba(47,123,255,.12),transparent 70%);
  pointer-events:none;
  z-index:0;
}
h1,h2,h3,h4,h5,h6{font-family:inherit;color:var(--text);letter-spacing:.01em}
h1{font-size:clamp(26px,3.4vw,42px);line-height:1.28;margin:0 0 16px}
h2{font-size:clamp(22px,2.4vw,30px);line-height:1.35;margin:0 0 12px}
h3{font-size:17px;line-height:1.5;margin:0 0 10px}
p{margin:0 0 12px}
p:last-child{margin-bottom:0}
a{color:inherit;text-decoration:none;transition:color .22s ease}
a:hover{color:#8fe4ff}
img{max-width:100%;height:auto;display:block}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
*,*::before,*::after{box-sizing:border-box}
.site-container{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;position:relative;z-index:1}
.section{padding:66px 0;position:relative}
.section-alt{
  background:linear-gradient(180deg,rgba(11,19,38,.92),rgba(6,11,22,.55));
  border-top:1px solid rgba(110,160,255,.09);
  border-bottom:1px solid rgba(110,160,255,.09);
}
.section-head{margin-bottom:30px;max-width:820px}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--muted);font-size:15px;margin:0}
.eyebrow{
  display:inline-block;
  font-size:12px;
  letter-spacing:.18em;
  color:#6fd6ff;
  margin-bottom:10px;
  text-transform:uppercase;
}
/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,11,22,.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:14px;
  padding-bottom:12px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;
  border-radius:13px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  display:grid;place-items:center;
  color:#04101f;font-weight:800;font-size:15px;
  box-shadow:var(--glow);
}
.brand-name{font-size:18px;font-weight:700;color:#fff;line-height:1.2;display:block}
.brand-sub{display:block;font-size:11px;color:var(--muted-2);font-weight:400;letter-spacing:.08em;margin-top:3px}
.nav-download{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 20px;border-radius:999px;
  background:linear-gradient(135deg,rgba(47,123,255,.95),rgba(63,224,255,.9));
  color:#04101f;font-weight:700;font-size:14px;
  box-shadow:0 8px 22px rgba(47,123,255,.32),0 0 18px rgba(63,224,255,.28);
  transition:transform .22s ease,box-shadow .22s ease;
  white-space:nowrap;
}
.nav-download:hover{transform:translateY(-2px);color:#04101f;box-shadow:0 12px 28px rgba(47,123,255,.42),0 0 24px rgba(63,224,255,.4)}
.nav-chips-wrap{position:relative}
.nav-chips-wrap::after{
  content:"";position:absolute;right:0;top:0;bottom:12px;width:44px;
  background:linear-gradient(90deg,rgba(6,11,22,0),rgba(6,11,22,.95));
  pointer-events:none;
}
.nav-chips{
  display:flex;gap:10px;
  overflow-x:auto;
  padding:2px 44px 14px 0;
  scrollbar-width:none;
}
.nav-chips::-webkit-scrollbar{display:none}
.chip{
  flex:0 0 auto;
  padding:8px 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.04);
  color:var(--muted);
  font-size:14px;
  line-height:1.5;
  white-space:nowrap;
  transition:all .22s ease;
}
.chip:hover{color:#fff;border-color:var(--line-strong);box-shadow:0 0 16px rgba(63,224,255,.22)}
.chip.is-active{
  background:linear-gradient(135deg,rgba(47,123,255,.95),rgba(63,224,255,.88));
  color:#04101f;font-weight:700;border-color:transparent;
  box-shadow:0 6px 18px rgba(47,123,255,.3);
}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:999px;
  font-size:15px;font-weight:700;
  border:1px solid transparent;
  transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease;
  cursor:pointer;
}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--primary-2));
  color:#04101f;
  box-shadow:0 12px 30px rgba(47,123,255,.34),0 0 22px rgba(63,224,255,.3);
}
.btn-primary:hover{transform:translateY(-2px);color:#04101f;box-shadow:0 16px 38px rgba(47,123,255,.45),0 0 30px rgba(63,224,255,.45)}
.btn-ghost{
  background:rgba(255,255,255,.045);
  border-color:var(--line);
  color:var(--text);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--line-strong);color:#fff;box-shadow:0 10px 26px rgba(47,123,255,.2)}
.btn-sm{padding:11px 22px;font-size:14px}
/* ---------- cards & grids ---------- */
.card{
  display:block;
  min-width:0;
  padding:26px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.022));
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  color:var(--text);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(63,224,255,.38);box-shadow:0 22px 44px rgba(3,8,20,.6),0 0 26px rgba(63,224,255,.14)}
.card h3{color:#fff;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px;margin:0}
.card-idx{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:11px;
  background:rgba(63,224,255,.12);
  border:1px solid rgba(63,224,255,.32);
  color:#9ee9ff;font-size:13px;font-weight:700;
  margin-bottom:14px;
}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.grid-2>*,.grid-3>*,.grid-4>*{min-width:0}
/* ---------- hero ---------- */
.hero{padding:56px 0 64px;position:relative;overflow:hidden}
.hero-grid{
  display:grid;
  grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);
  gap:44px;
  align-items:start;
}
.badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 17px;border-radius:999px;
  border:1px solid rgba(63,224,255,.34);
  background:rgba(63,224,255,.1);
  color:#9ee9ff;font-size:12.5px;letter-spacing:.06em;
  margin-bottom:18px;line-height:1.6;
  min-width:0;text-align:left;
}
.hero-lead{color:var(--muted);font-size:16px;max-width:640px;margin-bottom:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-panel{
  min-width:0;
  border-radius:var(--radius);
  border:1px solid rgba(63,224,255,.28);
  background:linear-gradient(165deg,rgba(23,42,82,.78),rgba(9,16,32,.9));
  box-shadow:var(--shadow),0 0 34px rgba(47,123,255,.18);
  padding:20px 20px 18px;
}
.panel-head{display:flex;align-items:center;gap:7px;padding-bottom:14px;border-bottom:1px solid rgba(110,160,255,.16);margin-bottom:14px}
.panel-head .dot{width:9px;height:9px;border-radius:50%;background:rgba(63,224,255,.55);flex:0 0 9px}
.panel-head .dot:nth-child(2){background:rgba(47,123,255,.7)}
.panel-head .dot:nth-child(3){background:rgba(147,164,198,.5)}
.panel-title{margin-left:8px;font-size:13px;color:var(--muted);letter-spacing:.08em}
.panel-list li{
  display:grid;
  grid-template-columns:104px minmax(0,1fr);
  gap:12px;
  padding:11px 0;
  border-bottom:1px dashed rgba(110,160,255,.14);
  font-size:14px;
}
.panel-list li:last-child{border-bottom:0}
.panel-key{color:#9ee9ff;font-weight:600;white-space:nowrap}
.panel-val{color:var(--muted);min-width:0}
.panel-foot{
  margin-top:12px;
  padding-top:14px;
  border-top:1px solid rgba(110,160,255,.16);
  font-size:12.5px;
  color:var(--muted-2);
  line-height:1.7;
}
/* ---------- pain ---------- */
.pain-card{display:flex;flex-direction:column;height:100%}
.pain-num{
  font-size:13px;font-weight:700;color:#6fd6ff;
  letter-spacing:.14em;margin-bottom:12px;
}
/* ---------- steps ---------- */
.step-list{display:grid;gap:16px}
.step-item{
  display:grid;
  grid-template-columns:64px minmax(0,1fr);
  gap:20px;
  align-items:start;
  padding:22px 24px;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(255,255,255,.06),rgba(255,255,255,.018));
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.step-item:hover{border-color:rgba(63,224,255,.36);transform:translateX(4px);box-shadow:0 16px 34px rgba(3,8,20,.5)}
.step-num{
  display:grid;place-items:center;
  width:52px;height:52px;border-radius:16px;
  background:linear-gradient(135deg,rgba(47,123,255,.9),rgba(63,224,255,.85));
  color:#04101f;font-weight:800;font-size:17px;
  box-shadow:0 10px 24px rgba(47,123,255,.3);
}
.step-body{min-width:0}
.step-body h3{margin-bottom:8px}
.step-body p{color:var(--muted);font-size:14.5px;margin:0}
/* ---------- metrics ---------- */
.metric-card{
  padding:22px 20px;
  border-radius:var(--radius);
  border:1px solid rgba(63,224,255,.2);
  background:linear-gradient(170deg,rgba(20,36,70,.75),rgba(8,15,30,.85));
  min-width:0;
  transition:transform .25s ease,border-color .25s ease;
}
.metric-card:hover{transform:translateY(-4px);border-color:rgba(63,224,255,.5)}
.metric-name{font-size:13px;color:#9ee9ff;letter-spacing:.06em;margin-bottom:10px;font-weight:700}
.metric-formula{
  font-size:14px;color:var(--text);
  background:rgba(63,224,255,.08);
  border:1px solid rgba(63,224,255,.2);
  border-radius:10px;
  padding:10px 12px;
  line-height:1.65;
  word-break:break-word;
}
.metric-note{font-size:13px;color:var(--muted);margin-top:12px}
.metric-foot{font-size:13px;color:var(--muted-2);margin-top:22px}
/* ---------- compare ---------- */
.compare-list{display:grid;gap:14px}
.compare-row{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);
  gap:18px;
  padding:18px 22px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(255,255,255,.035);
  min-width:0;
}
.compare-say{
  color:#ffc98a;
  font-weight:600;
  font-size:14.5px;
  min-width:0;
}
.compare-say::before{content:"常见说法 · ";color:var(--muted-2);font-weight:400;font-size:12.5px;letter-spacing:.06em}
.compare-real{color:var(--muted);font-size:14.5px;min-width:0}
.compare-real::before{content:"实际情况 · ";color:#6fd6ff;font-size:12.5px;letter-spacing:.06em}
/* ---------- checklist ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.check-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 18px;
  border-radius:var(--radius-sm);
  border:1px solid var(--line);
  background:rgba(255,255,255,.032);
  min-width:0;
  transition:border-color .22s ease,background .22s ease;
}
.check-item:hover{border-color:rgba(63,224,255,.36);background:rgba(63,224,255,.06)}
.check-mark{
  flex:0 0 20px;width:20px;height:20px;border-radius:6px;
  border:1px solid rgba(63,224,255,.5);
  background:rgba(63,224,255,.14);
  margin-top:3px;
  position:relative;
}
.check-mark::after{
  content:"";position:absolute;left:6px;top:2px;
  width:6px;height:11px;
  border-right:2px solid #9ee9ff;border-bottom:2px solid #9ee9ff;
  transform:rotate(40deg);
}
.check-text{color:var(--muted);font-size:14.5px;min-width:0}
/* ---------- cms list ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card{
  min-width:0;
  border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  overflow:hidden;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(63,224,255,.38);box-shadow:0 22px 44px rgba(3,8,20,.6)}
.post-link{display:block;padding:24px 22px;height:100%;min-width:0}
.post-link h3{color:#fff;font-size:16.5px;line-height:1.55;margin-bottom:10px;word-break:break-word}
.post-link p{
  color:var(--muted);font-size:14px;margin:0 0 14px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;color:var(--muted-2)}
.post-tag{
  padding:3px 10px;border-radius:999px;
  border:1px solid rgba(63,224,255,.3);
  background:rgba(63,224,255,.1);
  color:#9ee9ff;
}
.empty-note{
  color:var(--muted);
  font-size:14.5px;
  padding:26px 24px;
  border-radius:var(--radius-sm);
  border:1px dashed rgba(110,160,255,.28);
  background:rgba(255,255,255,.03);
  margin:0;
}
/* ---------- faq ---------- */
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  background:rgba(255,255,255,.035);
  padding:0 20px;
  margin-bottom:12px;
  transition:border-color .22s ease,background .22s ease;
}
.faq-item:hover{border-color:rgba(63,224,255,.32);background:rgba(63,224,255,.05)}
.faq-item summary{
  cursor:pointer;
  padding:18px 0;
  font-weight:600;
  color:#fff;
  font-size:15.5px;
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:#6fd6ff;font-size:20px;line-height:1;flex:0 0 auto}
.faq-item[open] summary::after{content:"−"}
.faq-item p{color:var(--muted);font-size:14.5px;padding-bottom:18px;margin:0}
/* ---------- download ---------- */
.download-panel{
  border-radius:calc(var(--radius) + 6px);
  border:1px solid rgba(63,224,255,.3);
  background:
    radial-gradient(520px 240px at 12% 0%,rgba(47,123,255,.28),transparent 65%),
    linear-gradient(160deg,rgba(22,40,78,.85),rgba(8,14,28,.92));
  box-shadow:var(--shadow),0 0 36px rgba(47,123,255,.16);
  padding:38px 34px;
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:32px;
  align-items:center;
}
.download-copy{min-width:0}
.download-copy h2{margin-bottom:12px}
.download-copy p{color:var(--muted);font-size:14.5px;margin:0}
.download-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;min-width:0}
.dl-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  padding:16px 10px;
  border-radius:14px;
  border:1px solid rgba(63,224,255,.3);
  background:linear-gradient(160deg,rgba(255,255,255,.09),rgba(255,255,255,.03));
  color:var(--text);
  font-size:14.5px;
  font-weight:700;
  text-align:center;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,color .22s ease;
  min-width:0;
}
.dl-btn span{font-size:11.5px;font-weight:400;color:var(--muted);letter-spacing:.04em}
.dl-btn:hover{
  transform:translateY(-3px);
  color:#fff;
  border-color:rgba(63,224,255,.7);
  box-shadow:0 14px 30px rgba(47,123,255,.3),0 0 22px rgba(63,224,255,.28);
}
/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,14,28,.92),rgba(4,8,16,.98));
  padding:52px 0 26px;
  margin-top:0;
  position:relative;
  z-index:1;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);
  gap:32px;
  padding-bottom:30px;
  border-bottom:1px solid rgba(110,160,255,.14);
}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-desc{color:var(--muted);font-size:14px;max-width:520px;margin:0}
.footer-col h4{
  font-size:14px;
  color:#fff;
  margin:0 0 14px;
  letter-spacing:.06em;
  font-weight:700;
}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{color:var(--muted);font-size:14px}
.footer-links a:hover{color:#8fe4ff}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  padding-top:22px;
  color:var(--muted-2);
  font-size:13px;
}
/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-panel{grid-template-columns:1fr;padding:32px 26px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid > div:first-child{grid-column:1 / -1}
}
@media screen and (max-width:768px){
  .section{padding:52px 0}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .check-grid{grid-template-columns:1fr}
  .compare-row{grid-template-columns:1fr;gap:10px}
  .step-item{grid-template-columns:1fr;gap:14px;padding:20px}
  .step-num{width:44px;height:44px;border-radius:13px;font-size:15px}
  .download-actions{grid-template-columns:1fr}
  .hero{padding:42px 0 50px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media screen and (max-width:520px){
  .site-container{padding-left:16px;padding-right:16px}
  .header-top{padding-top:12px;padding-bottom:10px}
  .brand-name{font-size:16px}
  .brand-sub{font-size:10.5px}
  .nav-download{padding:8px 15px;font-size:13px}
  .chip{padding:7px 15px;font-size:13px}
  .panel-list li{grid-template-columns:1fr;gap:4px}
  .card{padding:22px 18px}
  .post-link{padding:20px 18px}
  .download-panel{padding:26px 18px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .hero-actions .btn{width:100%}
}