/* 霜白极地 — 冰蓝底 + 霜白高光 */
.theme-frost {
  --bg: #0c1218;
  --bg-elev: #151e28;
  --bg-soft: #1e2a38;
  --ink: #eef6ff;
  --muted: #8ea4b8;
  --line: rgba(168,200,224, 0.12);
  --line-strong: rgba(168,200,224, 0.22);
  --accent: #a8c8e0;
  --accent-2: #d8e8f5;
  --accent-ink: #101820;
  --font-display: "Iceberg", sans-serif;
  --font-body: "Assistant", system-ui, sans-serif;
}
.theme-frost .page-atmosphere {
  background:
    radial-gradient(780px 420px at 12% 0%, rgba(168,200,224,0.18), transparent 55%),
    radial-gradient(640px 360px at 92% 18%, rgba(168,200,224,0.1), transparent 50%),
    #0c1218;
}
.theme-frost .masthead-brand {
  background: linear-gradient(100deg, #eef6ff, #d8e8f5 55%, #a8c8e0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.theme-frost .btn-primary,
.theme-frost .link-vip {
  background: linear-gradient(135deg, #d8e8f5, #a8c8e0);
  color: #101820;
}
.theme-frost .section-kicker { color: #d8e8f5; }
.theme-frost .badge.paid { background: #a8c8e0; color: #101820; }