:root{color-scheme:light dark;--ink:#121426;--muted:#62677d;--paper:#f5f6fb;--card:#fff;--primary:#5149e6;--secondary:#12aaa9;--warm:#f47443;--line:rgba(81,73,230,.14)}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:radial-gradient(circle at 90% 0%,rgba(81,73,230,.12),transparent 30rem),var(--paper);line-height:1.62}header{background:linear-gradient(135deg,#101326,#272452);color:#fff;padding:52px 22px 44px}.wrap{width:min(820px,calc(100% - 36px));margin:0 auto}.brand{font-size:.82rem;font-weight:800;letter-spacing:.12em;color:#8ee0dc}h1{margin:8px 0 10px;font-size:clamp(2rem,6vw,3.5rem);line-height:1.08}.lead{max-width:650px;color:rgba(255,255,255,.78);font-size:1.05rem}main{padding:26px 0 52px}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px;margin:16px 0;box-shadow:0 12px 32px rgba(21,24,50,.06)}h2{margin:0 0 8px;font-size:1.25rem}p,li{color:var(--muted)}a{color:var(--primary);font-weight:700}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.button{display:inline-block;text-decoration:none;color:#fff;background:var(--primary);border-radius:12px;padding:11px 16px}.notice{border-left:4px solid var(--warm)}footer{padding:0 0 40px;color:var(--muted);font-size:.85rem}@media(prefers-color-scheme:dark){:root{--ink:#f5f6ff;--muted:#b4b8cc;--paper:#0d0f1b;--card:#171a2a;--line:rgba(142,224,220,.14)}}