*{box-sizing:border-box}body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1d2733;background:#f5f7fa}
a{color:#0b5cad}header{background:#102a43;color:#fff}header .w{display:flex;align-items:center;gap:20px;padding:12px 16px}header a{color:#fff;text-decoration:none}.logo{font-weight:800;font-size:20px}.logo span{color:#ffb020}
header nav a{font-size:14px;opacity:.9;margin-right:12px}.w{max-width:980px;margin:0 auto;padding:0 16px}main.w{padding-top:18px}
h1{font-size:28px;line-height:1.25;margin:8px 0}h2{font-size:21px;margin-top:28px}.intro{color:#455466}
.calc{background:#fff;border-radius:12px;padding:18px;box-shadow:0 1px 4px rgba(0,0,0,.08);display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:720px){.calc{grid-template-columns:1fr}h1{font-size:23px}header nav{display:none}.res{order:-1;position:sticky;top:0;z-index:2}}
.calc label{display:block;font-size:13px;color:#52606d;margin-top:8px}.calc input,.calc select{width:100%;padding:9px 10px;border:1px solid #c7d0db;border-radius:8px;font:inherit}
.res{background:#f0f6ff;border-radius:10px;padding:14px}.res h3{margin:0 0 8px;font-size:16px}.res table{width:100%;border-collapse:collapse}.res td{padding:6px 2px;border-bottom:1px solid #dbe6f3;font-size:15px}.res td:last-child{text-align:right;font-weight:700}
.res tr:first-child td{font-size:18px;color:#0b4a8b}
.ad{margin:18px 0;min-height:100px;border:1px dashed #c7d0db;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#9aa5b1;font-size:12px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}.card{background:#fff;border-radius:12px;padding:16px;box-shadow:0 1px 4px rgba(0,0,0,.08);text-decoration:none;color:inherit}.card b{color:#0b4a8b}.card p{margin:6px 0 0;font-size:14px;color:#52606d}
footer{margin-top:40px;background:#102a43;color:#bcccdc;font-size:14px}footer .w{padding:20px 16px}footer a{color:#bcccdc}.faq dt{font-weight:700;margin-top:12px}.faq dd{margin:4px 0 0}
.note{font-size:13px;color:#7b8794}