:root{
  --navy:#0b1c3a;
  --navy-2:#12284c;
  --white:#fff;
  --ink:#122033;
  --muted:#5a6b80;
  --line:#d9e1ea;
  --accent:#1e6bff;
  --max:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--white)}
body{font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.7;background:var(--white)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
button,input,label,select{font-family:inherit}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:80;background:var(--navy);color:#e8eef8}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px;flex-wrap:wrap}
.brand{font-weight:800;letter-spacing:.12em;font-size:13px}
.nav{display:flex;gap:16px;flex-wrap:wrap;font-size:14px;color:#b8c6dc}
.nav a[aria-current="page"]{color:#fff;border-bottom:2px solid #fff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:42px;padding:0 16px;border:1px solid var(--navy);
  background:transparent;color:var(--navy);font-size:13px;font-weight:800;cursor:pointer;
}
.btn-fill{background:var(--accent);border-color:var(--accent);color:#fff}
.site-header .btn{border-color:#fff;color:#fff}
.site-header .btn-fill{background:var(--accent);border-color:var(--accent)}
.kicker{display:block;font-size:11px;letter-spacing:.18em;font-weight:800;margin-bottom:8px;color:#8eb0e8}
.section-head{margin-bottom:20px}
.section-head h2{font-size:clamp(22px,3vw,32px);margin-bottom:8px}
.section-head p{color:var(--muted)}
.footer{padding:40px 0 20px;background:var(--navy);color:#c5d2e6}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr .8fr .9fr;gap:20px}
.footer h3,.footer h4{margin-bottom:10px;color:#fff;font-size:15px}
.footer p,.footer a,.footer li{color:#b8c6dc;font-size:14px}
.footer ul{display:grid;gap:6px}
.copyright{margin-top:20px;padding-top:12px;border-top:1px solid #2a4068;font-size:12px}
img[data-src]{min-height:80px;background:#eef2f8}
.below-fold{content-visibility:auto;contain-intrinsic-size:auto 400px}
@media(max-width:720px){.nav{display:none}.footer-grid{grid-template-columns:1fr}}