:root{
  --ink:#1c2430;
  --navy:#0d2f5b;
  --paper:#ffffff;
  --line:#cfd6de;
  --mute:#5b6570;
  --head:#f4f6f8;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","PingFang SC","Noto Sans SC",sans-serif;
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
}
a{color:var(--navy);text-decoration:none}
img{max-width:100%;height:auto;display:block}
nav{
  position:sticky;top:0;z-index:10;
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 8vw;
  background:#fff;
  border-bottom:1px solid var(--line);
}
.logo{color:var(--navy);font-weight:700;letter-spacing:.04em}
.menu{display:flex;gap:22px;font-size:14px}
.menu a{color:var(--ink)}
.menu a:hover{color:var(--navy)}
.navy{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:40px;padding:0 16px;
  background:var(--navy);color:#fff;font-size:14px;font-weight:600;
  border:1px solid var(--navy);
}
.navy.sm{min-height:32px;padding:0 10px;font-size:13px}
.navy:hover{background:#0a2548}
.hero{padding:56px 8vw 48px;border-bottom:1px solid var(--line)}
.hero.compact{padding:48px 8vw 32px}
.kicker{font-size:13px;letter-spacing:.12em;color:var(--navy);margin-bottom:10px;font-weight:700}
h1{font-size:clamp(24px,3vw,34px);font-weight:700;max-width:18ch}
.sub{margin-top:10px;max-width:46ch}
.brief{margin:12px 0 24px;color:var(--mute)}
table{
  width:100%;border-collapse:collapse;margin:32px 0 28px;
  font-size:14px;
}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left}
th{background:var(--head);font-weight:600}
.hero img,.two img,.docs img{
  margin-top:8px;height:240px;object-fit:cover;width:100%;
  border:1px solid var(--line);filter:grayscale(.2);
}
section{padding:56px 8vw;border-bottom:1px solid var(--line)}
section>p{margin:8px 0 24px;color:var(--mute);max-width:58ch}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cards article{border:1px solid var(--line);padding:18px 16px 20px}
.cards h3{font-size:16px;margin-bottom:8px}
.cards small{color:var(--mute)}
.cards b{display:block;margin-top:12px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.two img{margin:0;height:300px}
.two ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0 24px}
.two li{border-bottom:1px solid var(--line);padding:8px 0;font-size:14px}
details{border-bottom:1px solid var(--line);padding:12px 0}
summary{cursor:pointer;font-weight:600}
details p{margin-top:8px;max-width:70ch}
.help{display:grid;grid-template-columns:210px 1fr;gap:32px}
.help aside{display:flex;flex-direction:column;gap:10px;position:sticky;top:64px;align-self:start}
.help aside a{color:var(--ink);font-size:14px}
.help aside a:hover{color:var(--navy)}
.docs article{margin-bottom:36px}
.docs img{max-width:480px;height:220px;margin:16px 0}
.policy{margin-top:14px;padding:14px;border:1px solid var(--line)}
footer{padding:36px 8vw 20px}
.cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px}
.cols h4{margin-bottom:8px;font-size:13px}
.cols a,.cols p{display:block;margin:6px 0;color:var(--mute);font-size:13px}
.copy{margin-top:20px;font-size:12px;color:var(--mute);border-top:1px solid var(--line);padding-top:12px}
@media (max-width:980px){
  .menu{display:none}
  .cards,.two,.help,.cols{grid-template-columns:1fr}
  table{font-size:12px}
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}