:root{
  --ink:#1a2332;
  --mute:#5b6778;
  --line:#dbe3ee;
  --navy:#12365c;
  --ok:#1f7a4d;
  --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:1.6;
}
a{color:var(--navy);text-decoration:none}
img{max-width:100%;height:auto;display:block}
svg{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linejoin:round;stroke-linecap:round}
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{display:flex;align-items:center;gap:8px;color:var(--navy);font-weight:700}
.logo svg{width:18px;height:18px}
.menu{display:flex;gap:22px;font-size:14px}
.menu a{color:var(--ink)}
.menu a:hover{color:var(--navy)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:38px;padding:0 14px;
  border:1px solid var(--navy);color:var(--navy);background:#fff;font-size:14px;font-weight:600;
}
.btn.solid{background:var(--navy);color:#fff}
.btn:hover{opacity:.92}
.ghost{font-size:14px;border-bottom:1px solid var(--navy);padding-bottom:2px}
.hero{padding:56px 8vw 48px}
.hero.compact{padding:48px 8vw 28px}
.trust{font-size:clamp(26px,3.4vw,38px);font-weight:700;color:var(--navy);margin-bottom:12px}
h1{font-size:clamp(22px,2.8vw,32px);font-weight:700;max-width:18ch}
.sub{margin-top:10px;max-width:44ch}
.line{margin:12px 0 20px;color:var(--mute)}
.domain{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  max-width:560px;padding:10px 14px;margin-bottom:22px;
  border:1px solid var(--line);background:#f7f9fc;
}
.domain svg{width:18px;height:18px;color:var(--ok)}
.domain span{font-size:13px;color:var(--mute)}
.domain code{font-size:13px;color:var(--navy);font-weight:700}
.actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero img,.split img,.docs img{
  margin-top:28px;width:100%;height:240px;object-fit:cover;
  border:1px solid var(--line);filter:grayscale(.2);
}
section{padding:56px 8vw;border-top: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:14px}
.cards article{border:1px solid var(--line);padding:18px 16px 20px}
.cards h3{font-size:15px;margin-bottom:8px}
.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{margin:0;height:300px}
.split ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0 22px}
.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}
.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{font-size:13px;margin-bottom:8px}
.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,.three,.split,.help,.cols{grid-template-columns:1fr}
}

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