:root{
  --brand:#0ea5e9; --ink:#111827; --muted:#6b7280; --bg:#ffffff; --card:#f9fafb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Inter,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.container{max-width:980px;margin:0 auto;padding:24px}
nav{display:flex;gap:14px;align-items:center;padding:14px 24px;border-bottom:1px solid #e5e7eb;background:#fff;position:sticky;top:0}
nav a{color:var(--ink);text-decoration:none;font-weight:600}
nav a.active{color:var(--brand)}
.logo{font-weight:800;letter-spacing:.4px;color:var(--brand)}
.hero{padding:48px 24px;display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center}
.card{background:var(--card);border:1px solid #e5e7eb;border-radius:14px;padding:20px}
.btn{display:inline-block;padding:12px 16px;border-radius:10px;border:1px solid #0ea5e933;background:#e0f2fe;color:#0369a1;font-weight:700;text-decoration:none}
.list{line-height:1.8}
footer{border-top:1px solid #eee;margin-top:40px;color:var(--muted);padding:16px 24px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.badge{display:inline-block;background:#fef3c7;border:1px solid #fde68a;border-radius:999px;padding:4px 10px;color:#92400e;font-size:12px}
.notice{font-size:13px;color:var(--muted)}
canvas{max-width:100%;border:1px solid #e5e7eb;border-radius:8px}