:root{--brand:#2563eb;--accent:#f43f5e;--ink:#0f172a;--muted:#475569;--bg:#fff;--ring:#e2e8f0;--radius:16px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1080px;margin:0 auto;padding:0 16px}.section{padding:64px 0}.hero{background:linear-gradient(135deg,#eef2ff,#fff1f2)}.btn{display:inline-block;padding:10px 16px;border-radius:999px;border:1px solid var(--brand)}.btn-primary{background:var(--brand);color:#fff;border-color:var(--brand)}.btn-ghost{background:#fff;color:var(--brand)}.card{background:#fff;border:1px solid var(--ring);border-radius:var(--radius);padding:20px;box-shadow:0 10px 20px rgba(2,6,23,.05)}.grid{display:grid;grid-gap:16px;gap:16px}@media(min-width:768px){.grid-3{grid-template-columns:repeat(3,1fr)}}.small{font-size:14px}.lead,.small{color:var(--muted)}.lead{font-size:18px;line-height:1.6}