:root{
  --bg:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --brand:#f97316;
  --border:#e5e7eb;
  --surface:#f9fafb;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
.container{max-width:780px;margin:0 auto;padding:0 24px}
.site-header{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:10}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:16px;padding-bottom:16px;flex-wrap:wrap}
.brand{font-weight:700;color:var(--text);text-decoration:none;font-size:18px}
.site-header nav{display:flex;gap:20px;flex-wrap:wrap}
.site-header nav a{color:var(--muted);text-decoration:none;font-size:14px;font-weight:500}
.site-header nav a:hover,.site-header nav a.active{color:var(--brand)}
.content{padding:40px 24px 80px}
.hero{text-align:center;padding:40px 0 24px}
.hero h1{margin:0 0 12px;font-size:36px}
.hero p{margin:0;color:var(--muted);font-size:17px}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:24px}
@media (max-width:640px){.cards{grid-template-columns:1fr}}
.card{display:block;padding:24px;border:1px solid var(--border);border-radius:12px;background:var(--surface);text-decoration:none;color:inherit;transition:.2s}
.card:hover{border-color:var(--brand);transform:translateY(-2px)}
.card h2{margin:0 0 8px;font-size:20px}
.card p{margin:0;color:var(--muted);font-size:15px}
.content h1{font-size:28px;margin:0 0 16px;line-height:1.3}
.content h2{font-size:20px;margin:32px 0 12px;color:var(--text)}
.content h3{font-size:17px;margin:24px 0 8px;color:var(--text)}
.content p{margin:0 0 16px;color:#374151}
.site-footer{border-top:1px solid var(--border);padding:24px 0;margin-top:40px;color:var(--muted);font-size:13px;text-align:center}
.site-footer p{margin:4px 0}
.site-footer a{color:var(--brand)}