:root{--ink:#0b2b52;--blue:#1263c7;--muted:#526780;--soft:#f4f8fc;--line:#dfe8f1}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);line-height:1.75;background:#fff}
a{color:var(--blue);text-decoration:none}
.wrap{width:min(1050px,calc(100% - 32px));margin:auto}
header{border-bottom:1px solid var(--line);background:#fff}
.nav{display:flex;justify-content:space-between;gap:24px;align-items:center;padding:14px 0}
.brand{font-weight:800;color:var(--ink);font-size:18px}
nav a{margin-right:15px;color:var(--muted);font-size:14px}
main{padding:42px 0 65px}
h1{font-size:clamp(30px,5vw,48px);line-height:1.22}
h2{margin-top:40px}
.lead{font-size:18px;color:var(--muted);max-width:850px}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{border:1px solid var(--line);border-radius:14px;padding:20px}
.card p{color:var(--muted)}
.btn{display:inline-block;padding:11px 19px;background:var(--blue);color:#fff;border-radius:9px;font-weight:700;margin:12px 10px 12px 0}
.note{padding:16px 18px;background:var(--soft);border-left:4px solid var(--blue);border-radius:8px}
.breadcrumb{font-size:14px;color:var(--muted)}
table{width:100%;border-collapse:collapse}
th,td{padding:11px;border:1px solid var(--line);text-align:left}
details{border:1px solid var(--line);border-radius:10px;padding:12px 15px;margin:10px 0}
summary{font-weight:700;cursor:pointer}
footer{border-top:1px solid var(--line);background:var(--soft);padding:28px 0;color:var(--muted)}
@media(max-width:760px){.nav{flex-direction:column;align-items:flex-start}.grid{grid-template-columns:1fr}}