:root{--bg:#f6f7f9;--ink:#23262b;--muted:#6b7280;--accent:#2f6df6;--card:#fff;--line:#e5e7eb}
*{box-sizing:border-box}body{margin:0;font:16px/1.6 -apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
.top{background:#fff;border-bottom:1px solid var(--line)}.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{font-weight:700;font-size:20px;text-decoration:none;color:var(--ink)}.logo span{color:var(--accent)}
nav a{margin-left:18px;text-decoration:none;color:var(--muted)}nav a:hover{color:var(--ink)}
.hero{padding:48px 0 24px}.hero h1{font-size:30px;margin:0 0 8px}.hero p{color:var(--muted);max-width:620px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;padding:16px 0 32px}
.grid article{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.grid h2{font-size:18px;margin:0 0 6px}.grid p{margin:0;color:var(--muted)}
.about{padding:8px 0 48px}.about p{color:var(--muted);max-width:680px}
.foot{border-top:1px solid var(--line);background:#fff;color:var(--muted)}.foot .wrap{padding:20px 16px}
@media(max-width:600px){.hero h1{font-size:24px}nav a{margin-left:12px}}