:root{--ink:#0d1b3e;--blue:#1f4ed8;--bg:#f6f8fc;--card:#fff;--muted:#667085}
*{box-sizing:border-box}body{margin:0;font-family:Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
header{background:#fff;border-bottom:1px solid #e5e7eb}.nav{max-width:1100px;margin:auto;padding:18px 24px;display:flex;justify-content:space-between;align-items:center;gap:20px}
.logo{font-size:24px;font-weight:800}.nav a{color:var(--ink);text-decoration:none;margin-left:18px}
.hero{max-width:1000px;margin:auto;padding:90px 24px 70px;text-align:center}.hero h1{font-size:48px;line-height:1.1;margin:0 0 18px}.hero p{font-size:20px;color:var(--muted);max-width:720px;margin:0 auto 30px}
.btn{display:inline-block;background:var(--blue);color:#fff;text-decoration:none;padding:13px 20px;border-radius:9px;font-weight:700}
main{max-width:1000px;margin:auto;padding:30px 24px 70px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}.card{background:#fff;padding:24px;border-radius:14px;border:1px solid #e5e7eb}
h1,h2,h3{line-height:1.2}.muted{color:var(--muted)}footer{background:#fff;border-top:1px solid #e5e7eb;padding:28px 24px;text-align:center;font-size:14px;color:var(--muted)}
footer a{color:var(--muted);margin:0 8px}.content{max-width:760px}.notice{background:#eef3ff;border:1px solid #d7e2ff;padding:16px;border-radius:10px}
@media(max-width:700px){.hero h1{font-size:38px}.nav{align-items:flex-start;flex-direction:column}.nav a{margin:0 12px 0 0}}