:root{--ink:#1a1a2e;--muted:#6b7a99;--line:#dfe6f3;--bg:#f2f5fb;--card:#ffffff;
--brand:#1B3E8F;--brand-soft:#eaf0fb;--accent:#F5C842;--radius:12px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1060px;margin:0 auto;padding:0 22px}
header.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.topin{max-width:1060px;margin:0 auto;padding:12px 22px;display:flex;align-items:center;
justify-content:space-between;gap:18px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--brand);letter-spacing:1px}
.brand small{display:block;font-size:10px;font-weight:500;letter-spacing:1.6px;color:var(--muted)}
.mark{width:36px;height:36px;border-radius:9px;background:var(--brand);color:#fff;
display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:800}
nav{display:flex;gap:16px;flex-wrap:wrap;font-size:14px}
nav a{color:#3a4a7a;padding:5px 2px;white-space:nowrap}
nav a.on{color:var(--brand);font-weight:700;border-bottom:2px solid var(--brand)}
.hero{background:linear-gradient(135deg,#e6edfa 0%,#f2f5fb 60%,#fff 100%);
border-bottom:1px solid var(--line);padding:54px 0 46px}
.eyebrow{color:var(--brand);font-size:13px;letter-spacing:2px;font-weight:700;margin:0 0 12px}
h1{font-size:34px;line-height:1.35;margin:0 0 18px;letter-spacing:-.4px}
h2{font-size:23px;margin:0 0 16px;line-height:1.4}
h3{font-size:18px;margin:0 0 10px}
p{margin:0 0 14px}
.answer{font-size:18px;line-height:1.85;max-width:880px;color:#1a1a2e}
.disambig{font-size:14px;color:var(--muted);max-width:880px;border-left:3px solid var(--line);
padding-left:14px;margin-top:18px}
.btnrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:11px 22px;border-radius:8px;
font-size:15px;font-weight:700}
.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--brand)}
.btn:hover{text-decoration:none;opacity:.9}
main{padding:42px 0 60px}
section.block{margin:0 0 38px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.card .k{display:inline-block;background:var(--brand-soft);color:var(--brand);font-size:12px;
font-weight:700;padding:3px 10px;border-radius:20px;margin-bottom:12px}
.card p{font-size:14.5px;color:#4a5570;margin-bottom:0}
.card h3{margin-bottom:8px}
table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--line);
border-radius:var(--radius);overflow:hidden;font-size:15px}
th,td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f2f5fb;color:var(--brand);font-weight:700;width:210px}
tr:last-child td,tr:last-child th{border-bottom:0}
.note{background:#fdf6e3;border:1px solid #e0c76a;border-left:4px solid var(--accent);
padding:16px 20px;border-radius:8px;font-size:14.5px;color:#6b581c;margin:20px 0}
.note b{color:#54430f}
.ok{background:var(--brand-soft);border:1px solid #c8d4ee;border-left:4px solid var(--brand);
padding:16px 20px;border-radius:8px;font-size:14.5px;color:#1a3a7a;margin:20px 0}
.steps{counter-reset:s;list-style:none;padding:0;margin:0}
.steps li{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:9px;
padding:14px 18px 14px 54px;position:relative;margin-bottom:10px;font-size:15px}
.steps li::before{content:counter(s);position:absolute;left:16px;top:13px;width:26px;height:26px;
background:var(--brand);color:#fff;border-radius:50%;display:flex;align-items:center;
justify-content:center;font-size:13px;font-weight:700}
ul.clean{padding-left:20px;margin:0 0 14px}
ul.clean li{margin-bottom:7px}
.faq{border-top:1px solid var(--line)}
.qa{padding:20px 0;border-bottom:1px solid var(--line)}
.qa dt{font-weight:700;font-size:16.5px;margin-bottom:8px;color:#1a1a2e}
.qa dt::before{content:"Q";display:inline-flex;width:22px;height:22px;background:var(--brand-soft);
color:var(--brand);border-radius:5px;align-items:center;justify-content:center;font-size:12px;
margin-right:9px;vertical-align:1px}
.qa dd{margin:0;color:#4a5570;font-size:15px;max-width:900px}
.meta{font-size:13px;color:var(--muted);margin-top:24px}
footer{border-top:1px solid var(--line);background:#fff;padding:30px 0 26px;font-size:13.5px;color:var(--muted)}
.fgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px;margin-bottom:20px}
footer b{color:var(--ink);display:block;margin-bottom:7px;font-size:14px}
footer a{color:var(--brand)}
.fbar{border-top:1px solid var(--line);padding-top:16px;display:flex;justify-content:space-between;
gap:12px;flex-wrap:wrap;font-size:12.5px}
.crumb{font-size:13px;color:var(--muted);margin:0 0 22px}
.crumb a{color:var(--muted)}
@media(max-width:700px){h1{font-size:26px}.answer{font-size:16px}.topin{padding:12px 16px}
nav{gap:12px;font-size:13px}th{width:auto;display:block;background:#f2f5fb}
td{display:block}table{border-radius:8px}}

/* navy deepblue-white 2026-11-11 | #1B3E8F / #F5C842 / #C8D4EE | ref www.geosz.cn */
.eyebrow{border-left:3px solid #F5C842;padding-left:10px}
.btn:hover{box-shadow:0 0 0 2px rgba(245,200,66,.55)}
.disambig{border-left-color:#C8D4EE}
.note{border-left-color:#e0c76a}