:root{
  --navy:#0b3a5b;
  --ink:#16324a;
  --mute:#5a7386;
  --line:#d5e0e8;
  --paper:#ffffff;
}
*{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:1.55;
}
a{color:inherit;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 7vw;background:var(--navy);color:#fff;
}
.logo{font-weight:700;letter-spacing:.04em;color:#fff}
.menu{display:flex;flex-wrap:wrap;gap:16px;font-size:13px}
.menu a{color:rgba(255,255,255,.86)}
.menu a:hover{color:#fff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:36px;padding:0 14px;
  background:#fff;color:var(--navy);font-size:13px;font-weight:700;
}
.hero{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:64px 7vw;background:#f4f7fa;
}
.hero.compact{display:block;padding:48px 7vw 28px}
.kicker{font-size:clamp(24px,3.2vw,36px);font-weight:700;color:var(--navy);margin-bottom:14px}
h1{font-size:clamp(22px,2.8vw,32px);font-weight:700;max-width:16ch}
.sub{margin-top:10px;max-width:42ch;color:var(--mute)}
.line{margin:12px 0 22px}
.mark{margin-top:16px;font-size:12px;letter-spacing:.16em;color:var(--mute)}
.desk{
  background:#fff;border:1px solid var(--line);
  box-shadow:0 16px 40px rgba(11,58,91,.08);
}
.desk header{
  padding:10px 14px;background:var(--navy);color:#fff;font-size:13px;
}
.desk .cols{display:grid;grid-template-columns:1fr 1fr}
.desk .cols div{padding:16px;border-right:1px solid var(--line)}
.desk .cols div:last-child{border-right:0;background:#f8fbfd}
.desk small{display:block;color:var(--navy);font-weight:700;margin-bottom:8px}
.desk img{height:140px;object-fit:cover;width:100%;filter:grayscale(.2)}
section{padding:56px 7vw}
section>p{margin:8px 0 24px;color:var(--mute);max-width:56ch}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.cards article{border:1px solid var(--line);padding:18px;background:#fff}
.cards h3{font-size:15px;margin-bottom:8px;color:var(--navy)}
.cards p{color:var(--mute);font-size:14px}
.cards b{display:block;margin-top:12px}
.cards small{color:var(--mute)}
.three{grid-template-columns:repeat(3,1fr)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.split img,.docs img{width:100%;height:280px;object-fit:cover;border:1px solid var(--line);filter:grayscale(.15)}
.split ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0 20px}
.split 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;color:var(--mute)}
.ghost{display:inline-block;margin-top:12px;color:var(--navy);font-size:13px}
.help{display:grid;grid-template-columns:210px 1fr;gap:28px}
.help aside{display:flex;flex-direction:column;gap:8px;position:sticky;top:64px;align-self:start}
.help aside a{color:var(--mute);font-size:14px}
.help aside a:hover{color:var(--navy)}
.docs article{margin-bottom:32px}
.docs img{max-width:460px;height:210px;margin:14px 0}
.policy{margin-top:12px;padding:14px;border:1px solid var(--line)}
footer{padding:36px 7vw 20px;background:var(--navy);color:#fff}
.foot{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:18px}
.foot h4{font-size:12px;margin-bottom:8px}
.foot a,.foot p{display:block;margin:6px 0;color:rgba(255,255,255,.78);font-size:13px}
footer .mark{color:rgba(255,255,255,.55)}
.copy{margin-top:18px;font-size:12px;color:rgba(255,255,255,.5)}
@media (max-width:1100px){
  .menu a:nth-child(n+5){display:none}
}
@media (max-width:980px){
  .menu{display:none}
  .hero,.cards,.three,.split,.help,.foot{grid-template-columns:1fr}
}

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