:root{
  --ink:#12324a;
  --mute:#4d6d82;
  --line:#d7e6f0;
  --blue:#1d7ab8;
  --sky:#e8f4fb;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Segoe UI","PingFang SC","Noto Sans SC",sans-serif;
  color:var(--ink);
  line-height:1.55;
  background:linear-gradient(180deg,#cfe8f8 0%,#eaf5fb 28%,#fff 62%);
}
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:14px 7vw;
  background:rgba(255,255,255,.78);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.logo{font-weight:700}
.menu{display:flex;gap:22px;font-size:14px;color:var(--mute)}
.menu a:hover{color:var(--ink)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:38px;padding:0 16px;border-radius:8px;
  background:var(--blue);color:#fff;font-size:14px;font-weight:700;
}
.hero{position:relative;padding:64px 7vw 48px;overflow:hidden}
.hero.compact{padding:48px 7vw 24px}
.map{
  position:absolute;inset:10% 6% auto;width:88%;height:280px;
  fill:none;stroke:#9ec9e4;stroke-width:1.2;opacity:.35;pointer-events:none;
}
.grow{position:relative;font-size:clamp(24px,3.6vw,40px);font-weight:750;margin-bottom:14px}
h1{position:relative;font-size:clamp(22px,2.8vw,32px);font-weight:700;max-width:18ch}
.sub{position:relative;margin-top:10px;max-width:46ch;color:var(--mute)}
.line{position:relative;margin:12px 0 24px}
.trio{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:36px}
.trio article{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 18px;
  box-shadow:0 10px 28px rgba(18,50,74,.06);
}
.trio h3{margin-bottom:8px}
.trio p{color:var(--mute);font-size:14px}
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{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}
.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,.docs img,.wide{
  width:100%;height:280px;object-fit:cover;border-radius:14px;
  border:1px solid var(--line);filter:grayscale(.12);
}
.wide{max-width:calc(100% - 14vw);margin:0 7vw 40px;height:220px}
.split ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0 20px}
.split li{background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 10px;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(--blue);font-size:13px}
.help{display:grid;grid-template-columns:200px 1fr;gap:28px}
.help aside{display:flex;flex-direction:column;gap:8px;position:sticky;top:72px;align-self:start}
.help aside a{color:var(--mute);font-size:14px}
.help aside a:hover{color:var(--blue)}
.docs article{margin-bottom:32px}
.docs img{max-width:460px;height:210px;margin:14px 0}
.policy{margin-top:12px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:12px}
footer{padding:36px 7vw 20px;border-top:1px solid var(--line);background:#fff}
.cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:18px}
.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:18px;font-size:12px;color:var(--mute)}
@media (max-width:980px){
  .menu{display:none}
  .trio,.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}}