:root { color-scheme: light; --ink:#182139; --muted:#677187; --blue:#3155e7; --line:#e3e8f1; }
* { box-sizing:border-box; }
body { margin:0; color:var(--ink); background:#fff; font:17px/1.95 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif; }
a { color:var(--blue); text-underline-offset:4px; }
a:focus-visible { outline:3px solid #8faaff; outline-offset:6px; }
header { min-height:82px; padding:18px max(32px,calc((100% - 1180px)/2)); border-bottom:1px solid var(--line); display:flex; align-items:center; justify-content:space-between; gap:20px; }
header>a { font-size:14px; text-decoration:none; }
.brand { display:flex; align-items:center; gap:10px; color:var(--ink); font-size:22px; font-weight:750; white-space:nowrap; }
.brand span { display:grid; place-items:center; width:34px; height:34px; border-radius:11px; background:var(--blue); color:#fff; line-height:1; }
main { width:min(800px,calc(100% - 64px)); margin:auto; padding:62px 0 72px; }
.eyebrow { color:var(--blue); font-size:14px; font-weight:600; margin:0 0 14px; }
h1 { font-size:clamp(30px,4.8vw,43px); line-height:1.4; letter-spacing:-1px; margin:0 0 23px; }
.lead { font-size:19px; color:#47556f; margin:0; }
.updated { font-size:13px; color:var(--muted); margin-top:20px; }
section { border-top:1px solid var(--line); margin-top:36px; padding-top:30px; }
h2 { font-size:25px; line-height:1.5; margin:0 0 18px; text-wrap:balance; }
section p { color:#58647b; margin:0 0 18px; }
strong { color:#263650; font-weight:650; }
.note { background:#f5f7fc; border-left:3px solid #bdcbf4; padding:20px 24px; color:#536584; font-size:15px; }
.more { display:inline-block; margin-top:6px; font-size:15px; font-weight:600; text-decoration:none; }
footer { padding:24px 20px; border-top:1px solid var(--line); color:var(--muted); font-size:12px; text-align:center; }
@media(max-width:600px) {
  header { min-height:72px; padding:16px 20px; }
  header>a { font-size:12px; }
  .brand { font-size:18px; }
  main { width:calc(100% - 40px); padding:38px 0 50px; }
  body { font-size:16px; }
  .lead { font-size:17px; }
  h2 { font-size:22px; }
  section { margin-top:28px; padding-top:24px; }
  .note { padding:16px 18px; }
}