:root{
  --bg:#161d28;
  --bg-top:#202b3d;
  --surface:#1a2f42;
  --surface-2:#20384d;
  --border:rgba(255,255,255,.07);
  --text:#f7f9fc;
  --muted:#b9c3cf;
  --blue:#3b82f6;
  --blue-2:#5ca2ff;
  --green:#16b77a;
  --yellow:#ffcc00;
  --red:#ff494f;
  --shadow:0 18px 50px rgba(0,0,0,.22);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--text);
  font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:
    radial-gradient(900px 420px at 50% -140px, rgba(59,130,246,.16), transparent 70%),
    linear-gradient(180deg,var(--bg-top) 0 250px,var(--bg) 560px);
  line-height:1.68;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--blue-2);text-decoration:none}
a:hover{text-decoration:underline}

.shell{width:min(920px,calc(100% - 32px));margin:0 auto}

.topbar{
  position:sticky;
  top:0;
  z-index:20;
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  background:rgba(22,29,40,.82);
  border-bottom:1px solid var(--border);
}

.topbar-inner{
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}

.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-.02em}
.brand-badge{
  width:40px;height:40px;border-radius:14px;
  display:grid;place-items:center;
  background:linear-gradient(145deg,#2f70dc,#3b82f6);
  box-shadow:0 10px 26px rgba(59,130,246,.28);
}
.brand-badge svg{width:23px;height:23px}
.brand-name{font-size:20px}

.nav{display:flex;gap:8px}
.nav a{
  color:var(--muted);
  font-size:14px;
  font-weight:700;
  padding:9px 12px;
  border-radius:11px;
}
.nav a.active,.nav a:hover{
  color:#fff;
  background:rgba(59,130,246,.13);
  text-decoration:none;
}

.hero{padding:76px 0 30px;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;
  border:1px solid rgba(92,162,255,.24);
  background:rgba(59,130,246,.09);
  color:#a9cdfd;
  border-radius:999px;
  font-size:13px;font-weight:800;
  letter-spacing:.02em;
}
.eyebrow-dot{width:8px;height:8px;border-radius:50%;background:var(--blue)}
h1{
  margin:17px auto 12px;
  max-width:760px;
  font-size:clamp(36px,7vw,58px);
  line-height:1.06;
  letter-spacing:-.045em;
}
.hero p{margin:0 auto;max-width:690px;color:var(--muted);font-size:17px}
.meta{
  margin:24px auto 0;
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:10px;
}
.meta span{
  border:1px solid var(--border);
  background:rgba(255,255,255,.035);
  color:#d4dbe4;
  padding:8px 12px;
  border-radius:12px;
  font-size:13px;
}

.notice{
  margin:20px 0 26px;
  padding:18px 20px;
  display:flex;
  gap:14px;
  background:rgba(59,130,246,.09);
  border:1px solid rgba(59,130,246,.22);
  border-radius:18px;
}
.notice-icon{
  flex:0 0 34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  color:#fff;background:var(--blue);
  font-weight:900;
}
.notice p{margin:0;color:#d8e6fb;font-size:14px}

.toc{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:22px;
  padding:22px;
  box-shadow:var(--shadow);
  margin:0 0 24px;
}
.toc-title{font-size:15px;font-weight:850;margin-bottom:12px}
.toc-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px}
.toc a{
  color:#cbd4de;font-size:14px;
  padding:8px 10px;border-radius:10px;
}
.toc a:hover{background:rgba(255,255,255,.045);color:#fff;text-decoration:none}

.card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:24px;
  padding:28px;
  box-shadow:var(--shadow);
  margin:0 0 18px;
  scroll-margin-top:96px;
}
.card-head{display:flex;gap:14px;align-items:flex-start;margin-bottom:12px}
.icon{
  width:42px;height:42px;flex:0 0 42px;
  border-radius:14px;
  display:grid;place-items:center;
  background:rgba(59,130,246,.13);
  color:var(--blue-2);
  border:1px solid rgba(59,130,246,.15);
  font-weight:900;
}
.card h2{font-size:23px;line-height:1.25;letter-spacing:-.025em;margin:5px 0 0}
.card h3{font-size:16px;margin:20px 0 6px;color:#fff}
.card p{color:var(--muted);margin:10px 0}
.card ul{color:var(--muted);padding-left:21px}
.card li{margin:8px 0}
.card strong{color:#fff}
.highlight{
  margin:16px 0 4px;
  padding:14px 16px;
  border-radius:14px;
  background:rgba(22,183,122,.08);
  border:1px solid rgba(22,183,122,.19);
  color:#ccefe1;
}
.warning{
  margin:16px 0 4px;
  padding:14px 16px;
  border-radius:14px;
  background:rgba(255,204,0,.07);
  border:1px solid rgba(255,204,0,.18);
  color:#f2e4a7;
}

.contact-card{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:linear-gradient(135deg,#1c3952,#193248);
}
.contact-card .cta{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 18px;
  border-radius:14px;
  background:var(--blue);
  color:#fff;font-weight:850;
  box-shadow:0 10px 28px rgba(59,130,246,.25);
  white-space:nowrap;
}
.contact-card .cta:hover{text-decoration:none;filter:brightness(1.06)}

footer{padding:24px 0 54px;color:#7f8b99;text-align:center;font-size:13px}
footer .links{display:flex;justify-content:center;gap:16px;margin-bottom:10px}
footer a{color:#aeb9c5}

@media (max-width:700px){
  .shell{width:min(100% - 24px,920px)}
  .topbar-inner{min-height:64px}
  .brand-name{font-size:18px}
  .nav a{font-size:13px;padding:8px 9px}
  .hero{padding:52px 0 24px}
  .hero p{font-size:15px}
  .toc-grid{grid-template-columns:1fr}
  .card{padding:22px 19px;border-radius:20px}
  .card h2{font-size:21px}
  .contact-card{align-items:flex-start;flex-direction:column}
  .contact-card .cta{width:100%}
}