:root{
  --bg:#ffffff; --fg:#1f2937; --muted:#6b7280; --ink:#111827; --accent:#111827; --border:#e5e7eb; --chip:#f3f4f6;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;color:var(--fg);background:var(--bg);}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1050px;margin:0 auto;padding:24px}
.header{position:sticky;top:0;background:rgba(255,255,255,.9);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--border);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 24px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);}
.logo{width:28px;height:28px}
.menu a{padding:8px 12px;border-radius:10px}
.menu a.active, .menu a:hover{background:var(--chip);text-decoration:none}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:28px;align-items:center;padding:32px 0}
.hero h1{font-size:clamp(28px,3.4vw,42px);line-height:1.15;margin:0 0 12px 0}
.hero p{font-size:18px;color:var(--muted)}
.card{border:1px solid var(--border);border-radius:16px;padding:18px;background:#fff}
.list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
.list li{display:flex;gap:10px;align-items:flex-start}
.bullet{width:8px;height:8px;border-radius:50%;background:var(--ink);margin-top:8px}
.btn{display:inline-block;background:var(--ink);color:#fff;padding:10px 16px;border-radius:14px}
.btn:hover{opacity:.9;text-decoration:none}
.btn-outline{border:1px solid var(--border);padding:10px 16px;border-radius:14px;background:#fff;color:var(--ink)}
.grid{display:grid;gap:16px}
.footer{border-top:1px solid var(--border);margin-top:32px}
.footer-inner{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding:18px 24px;font-size:14px;color:var(--muted)}
.form{display:grid;gap:14px}
.input,.textarea{width:100%;border:1px solid var(--border);border-radius:12px;padding:10px 12px;font-size:16px}
.textarea{min-height:140px;resize:vertical}
.prose h1{font-size:32px;margin:0 0 10px 0}
.prose h2{font-size:20px;margin:18px 0 6px 0}
.prose p{line-height:1.6}
.prose ul{margin:0 0 0 18px}
.banner{padding:12px 16px;background:var(--chip);border:1px solid var(--border);border-radius:12px}
@media (max-width:860px){ .hero{grid-template-columns:1fr;} }