:root {
  color-scheme: dark;
  font-family: "Segoe UI Variable", "Microsoft YaHei UI", sans-serif;
  color: #e8e7f0;
  background: #090b12;
  --panel: rgba(20, 22, 34, 0.82);
  --line: rgba(148, 163, 184, 0.18);
  --muted: #9ca3b6;
  --accent: #8b5cf6;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 80% 0%, #29194e 0, transparent 34rem), #090b12; }
a { color: inherit; }
.shell { width: min(920px, calc(100% - 40px)); margin: 0 auto; }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 76px; border-bottom: 1px solid var(--line); }
.brand { text-decoration: none; font-weight: 800; letter-spacing: -0.03em; }
.brand span { color: #a78bfa; }
.links { display: flex; gap: 18px; color: var(--muted); font-size: 14px; }
.links a { text-decoration: none; }
.links a:hover { color: #fff; }
main { padding: 72px 0 96px; }
.eyebrow { color: #a78bfa; font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
h1 { margin: 12px 0 20px; max-width: 760px; font-size: clamp(38px, 7vw, 68px); line-height: 1.02; letter-spacing: -.055em; }
.lead { max-width: 680px; color: var(--muted); font-size: 18px; line-height: 1.75; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 42px; }
.card { padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); box-shadow: 0 22px 80px rgba(0, 0, 0, .22); }
.card h2, .content h2 { margin: 0 0 12px; font-size: 19px; }
.card p, .content p, .content li { color: var(--muted); line-height: 1.75; }
.content { margin-top: 44px; padding: 34px; border: 1px solid var(--line); border-radius: 24px; background: var(--panel); }
.content section + section { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--line); }
.button { display: inline-flex; margin-top: 26px; padding: 12px 18px; border-radius: 12px; text-decoration: none; background: var(--accent); color: #fff; font-weight: 750; }
.note { margin-top: 26px; padding: 14px 16px; border-left: 3px solid var(--accent); color: var(--muted); background: rgba(139, 92, 246, .08); }
footer { padding: 28px 0 44px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
@media (max-width: 680px) { .links { display: none; } .grid { grid-template-columns: 1fr; } main { padding-top: 48px; } .content { padding: 24px; } }