:root{
  --canvas:#FAFAF8;
  --paper:#FFFFFF;
  --ink:#14161A;
  --ink-2:#3F444B;
  --ink-3:#716B61;
  --line:#ECE9E3;
  --line-strong:#DDD8CE;
  --accent:#1D4ED8;
  --accent-soft:#EEF3FE;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","PingFang SC","Segoe UI","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--canvas);
  color:var(--ink);
  font-family:var(--font);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  line-height:1.8;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.shell{width:min(900px,calc(100% - 48px));margin:0 auto}
.site-header{
  border-bottom:1px solid var(--line);
  background:rgba(250,250,248,.86);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
}
.header-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.wordmark{font-size:15px;font-weight:900;letter-spacing:.15em;color:var(--ink)}
.wordmark em{font-style:normal;color:var(--accent)}
.back{font-size:12.5px;font-weight:650;color:var(--ink-2)}
.back:hover{color:var(--ink);text-decoration:none}
main{padding:72px 0 96px}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:10.5px;font-weight:750;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--line-strong)}
h1{
  margin:18px 0 0;
  font-size:clamp(36px,5.4vw,58px);
  line-height:1.08;
  letter-spacing:-.045em;
  font-weight:790;
  text-wrap:balance;
}
.lede{margin:18px 0 0;max-width:680px;font-size:15px;line-height:1.9;color:var(--ink-2)}
.meta{margin-top:18px;font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:.02em}
h2{margin:48px 0 0;font-size:21px;line-height:1.35;letter-spacing:-.03em;font-weight:790}
h3{margin:26px 0 0;font-size:15px;line-height:1.45;letter-spacing:-.01em;font-weight:750}
p{margin:10px 0 0;font-size:14px;line-height:1.85;color:var(--ink-2)}
ul{margin:10px 0 0;padding-left:20px;color:var(--ink-2)}
li{margin:5px 0;font-size:14px;line-height:1.8}
.note{
  margin-top:28px;padding:18px 20px;border:1px solid var(--line);border-radius:16px;
  background:var(--paper);box-shadow:0 1px 2px rgba(20,22,26,.03);
  font-size:13px;color:var(--ink-3);
}
.note strong{color:var(--ink-2)}
.contact{margin-top:18px;font-size:14px}
.contact a{font-weight:700}
.footer{border-top:1px solid var(--line);background:#F7F6F2;padding:34px 0 28px}
.footer .shell{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.footer span,.footer a{font-size:10.5px;color:var(--ink-3)}
.footer .links{display:flex;gap:16px;flex-wrap:wrap}
.footer a:hover{color:var(--ink)}
@media (max-width:720px){
  .shell{width:calc(100% - 36px)}
  .header-inner{height:60px}
  main{padding:48px 0 72px}
  h2{margin-top:36px}
  .footer .shell{align-items:flex-start;flex-direction:column;gap:10px}
}