:root{
  --ink:#0a2540;
  --mute:#425466;
  --line:#e6ebf1;
  --accent:#635bff;
  --paper:#fafbff;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Inter","Segoe UI","PingFang SC",sans-serif;
  color:var(--ink);
  line-height:1.6;
  background:
    linear-gradient(180deg,rgba(237,233,254,.45),rgba(248,250,252,.9) 42%,#fff),
    radial-gradient(circle at 80% 10%,rgba(99,91,255,.08),transparent 36%);
}
body::before{
  content:"";
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    linear-gradient(rgba(99,91,255,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(99,91,255,.05) 1px,transparent 1px);
  background-size:28px 28px;
}
nav,main,footer{position:relative;z-index:1}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
nav{
  position:sticky;top:0;z-index:12;
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 7vw;
  background:rgba(250,251,255,.86);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.logo{font-weight:700;letter-spacing:-.03em}
.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:36px;padding:0 14px;border-radius:999px;
  border:1px solid #d6deeb;background:#fff;font-size:13px;font-weight:600;
}
.btn.solid{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn:hover{opacity:.92}
.hero{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding:72px 7vw 56px;
}
.hero.compact{display:block;padding:56px 7vw 28px}
.infra{
  font-size:clamp(26px,3.6vw,40px);
  font-weight:650;letter-spacing:-.04em;line-height:1.2;margin-bottom:14px;
}
h1{font-size:clamp(22px,2.8vw,32px);font-weight:650;max-width:18ch}
.sub{margin-top:10px;color:var(--mute);max-width:42ch}
.line{margin:14px 0 26px}
.bench{
  background:#fff;border-radius:16px;overflow:hidden;
  box-shadow:0 24px 60px rgba(10,37,64,.08);
  border:1px solid transparent;
  background-image:linear-gradient(#fff,#fff),linear-gradient(135deg,#7a73ff,#c084fc,#67e8f9);
  background-origin:border-box;background-clip:padding-box,border-box;
}
.chrome{
  display:flex;align-items:center;gap:6px;padding:10px 12px;
  border-bottom:1px solid var(--line);font-size:12px;color:var(--mute);
}
.chrome span{width:8px;height:8px;border-radius:50%;background:#e4e7ec}
.chrome b{margin-left:8px;font-weight:500}
.bench pre{
  margin:0;padding:16px 18px;font-size:12px;color:#334155;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  background:#f8f6ff;
}
.bench img{height:180px;object-fit:cover;width:100%;filter:grayscale(.15)}
section{padding:64px 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{
  padding:20px 18px 22px;border-radius:14px;background:#fff;
  border:1px solid transparent;
  background-image:linear-gradient(#fff,#fff),linear-gradient(135deg,#e0e7ff,#f5d0fe);
  background-origin:border-box;background-clip:padding-box,border-box;
}
.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:40px;align-items:center}
.split img,.docs img{
  width:100%;height:300px;object-fit:cover;border-radius:16px;
  border:1px solid var(--line);filter:grayscale(.12);
}
.split ul{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:10px;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;color:var(--mute)}
section a[href="help.html"]{color:var(--accent)}
.ghost{display:inline-block;margin-top:12px;color:var(--accent);font-size:13px}
.help{display:grid;grid-template-columns:210px 1fr;gap:32px}
.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(--accent)}
.docs article{margin-bottom:36px}
.docs img{max-width:480px;height:220px;margin:16px 0}
.policy{margin-top:12px;padding:14px;border:1px solid var(--line);border-radius:12px;background:#fff}
footer{padding:40px 7vw 22px;border-top:1px solid var(--line)}
.cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:20px}
.cols h4{font-size:12px;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:#8898aa}
@media (max-width:980px){
  .menu{display:none}
  .hero,.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}}