:root{color-scheme:light dark;--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#667085;--line:#d9e0ea;--accent:#2563eb} @media(prefers-color-scheme:dark){:root{--bg:#0f172a;--card:#111827;--text:#f8fafc;--muted:#a7b0c0;--line:#293548;--accent:#60a5fa}}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}.container{width:min(880px,calc(100% - 32px));margin:0 auto}header{border-bottom:1px solid var(--line);background:var(--card)}nav{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{color:var(--text);font-weight:750;text-decoration:none}.links{display:flex;gap:16px}.links a{color:var(--muted);text-decoration:none}.links a:hover{color:var(--accent)}main{padding:56px 0}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:clamp(24px,5vw,48px);box-shadow:0 16px 50px rgba(15,23,42,.08)}h1,h2{line-height:1.2;margin-top:0}h1{font-size:clamp(2rem,6vw,3.6rem)}h2{margin-top:2rem;font-size:1.45rem}p,li{color:var(--muted)}.button{display:inline-block;margin-top:12px;padding:11px 18px;border-radius:12px;background:var(--accent);color:#fff;text-decoration:none;font-weight:650}.meta{font-size:.95rem;color:var(--muted);margin-bottom:28px}.notice{padding:14px 16px;border:1px solid var(--line);border-radius:14px}footer{padding:0 0 40px;color:var(--muted);font-size:.9rem}