*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:#1e293b;background:#f8fafc}
a{color:#0b6bcb}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header.top{background:#fff;border-bottom:1px solid #e2e8f0}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:#0f172a;text-decoration:none}
.logo svg{flex:none}
nav a{color:#475569;text-decoration:none;margin-left:20px;font-size:15px}
nav a:hover{color:#0f172a}
.hero{background:linear-gradient(135deg,#0f2a4a,#13467a);color:#fff;padding:56px 0 48px}
.hero h1{margin:0 0 12px;font-size:36px;line-height:1.2}
.hero p{margin:0;max-width:640px;color:#cbd5e1;font-size:18px}
.jump{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.jump a{background:rgba(255,255,255,.12);color:#fff;text-decoration:none;padding:7px 14px;border-radius:999px;font-size:14px}
.jump a:hover{background:rgba(255,255,255,.22)}
section.cat{padding:40px 0 8px}
section.cat h2{margin:0 0 4px;font-size:24px}
section.cat .lead{margin:0 0 18px;color:#64748b}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px;display:flex;flex-direction:column}
.card h3{margin:0 0 6px;font-size:19px}
.card .tag{display:inline-block;font-size:12px;font-weight:600;color:#0b6bcb;background:#e8f1fb;border-radius:999px;padding:2px 10px;margin-bottom:10px;align-self:flex-start}
.card p{margin:0 0 16px;color:#475569;font-size:15px;flex:1}
.btn{display:inline-block;text-align:center;background:#0b6bcb;color:#fff;text-decoration:none;font-weight:600;padding:10px 16px;border-radius:8px}
.btn:hover{background:#0957a6}
.guide{background:#fff;border-top:1px solid #e2e8f0;border-bottom:1px solid #e2e8f0;margin-top:40px;padding:40px 0}
.guide h2{margin:0 0 16px;font-size:24px}
.guide ol{margin:0;padding-left:22px;max-width:760px}
.guide li{margin-bottom:10px}
.note{font-size:14px;color:#64748b;padding-top:28px}
footer{padding:28px 0 40px;font-size:14px;color:#64748b}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;border-top:1px solid #e2e8f0;padding-top:20px}
footer a{color:#475569;margin-right:16px}
.page{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:28px;margin:32px auto;max-width:760px}
.page h1{margin-top:0}
@media (max-width:640px){
  .hero{padding:40px 0 36px}.hero h1{font-size:28px}.hero p{font-size:16px}
  nav a{margin-left:12px;font-size:14px}
  nav a.hide-sm{display:none}
  .grid{grid-template-columns:1fr}
}