@charset "UTF-8";

:root {
  color-scheme: light;
  --paper: #fcfcfc;
  --ink: #242424;
  --muted: #727272;
  --line: #dbdbdb;
  --accent: #246bce;
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-underline-offset: .22em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
::selection { background: var(--accent); color: white; }
.shell { width: min(100% - 64px, 1040px); margin-inline: auto; }
.skip-link { position: absolute; left: 16px; top: -100px; padding: 12px 18px; background: var(--ink); color: white; z-index: 2; }
.skip-link:focus { top: 16px; }
.site-header { min-height: 100px; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; gap: 11px; align-items: center; text-decoration: none; font-size: 25px; font-weight: 800; letter-spacing: -.7px; }
.brand svg { width: 30px; height: 30px; flex: none; color: var(--accent); }
.site-nav { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; font-size: 14px; }
.site-nav a { padding-block: 12px; text-decoration: none; }
main { max-width: 760px; margin: 0 auto; padding: 65px 0 70px; }
.eyebrow { margin: 0 0 18px; font-size: 12px; font-weight: 600; letter-spacing: 1.6px; color: var(--accent); }
h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.3; letter-spacing: -1px; margin: 0 0 22px; }
.lead { font-size: 18px; line-height: 1.85; margin: 0; max-width: 660px; }
.scope { margin: 22px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.intro { padding-bottom: 33px; border-bottom: 1px solid var(--line); }
section { margin-top: 36px; }
h2 { margin: 0 0 14px; font-size: 23px; line-height: 1.55; letter-spacing: -.3px; }
p, li { font-size: 16px; line-height: 1.9; }
p { margin: 0 0 15px; }
ol, ul { padding-left: 1.55em; margin: 0 0 18px; }
li { padding-left: .15em; margin-block: 9px; }
.callout { border-left: 4px solid var(--accent); border-radius: 0 16px 16px 0; padding: 18px 22px; background: #f2f2f2; margin: 26px 0; }
.callout p:last-child { margin-bottom: 0; }
.email { font-size: clamp(22px, 4vw, 30px); font-weight: 600; overflow-wrap: anywhere; color: var(--accent); }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 12px 22px; margin: 8px 0 13px; border-radius: 14px; background: var(--accent); color: white; text-decoration: none; font-size: 15px; }
.button:hover { background: #1b50a2; color: white; }
.small { color: var(--muted); font-size: 14px; line-height: 1.85; }
.sample { white-space: pre-wrap; overflow-wrap: anywhere; font: inherit; line-height: 1.95; margin: 18px 0; padding: 20px 22px; border: 1px solid var(--line); border-radius: 20px; background: #f4f4f4; }
.related { padding-top: 26px; border-top: 1px solid var(--line); margin-top: 38px; }
.related a { display: inline-block; padding-block: 7px; }
code { font: .9em ui-monospace, Consolas, monospace; overflow-wrap: anywhere; }
.site-footer { display: flex; justify-content: space-between; gap: 16px 24px; flex-wrap: wrap; border-top: 1px solid var(--line); padding: 25px 0 32px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.site-footer a { text-decoration: none; }
@media (max-width: 600px) {
  .shell { width: calc(100% - 40px); }
  .site-header { min-height: 84px; gap: 16px; }
  .brand { font-size: 22px; gap: 8px; }
  .brand svg { width: 25px; height: 25px; }
  .site-nav { gap: 14px; font-size: 13px; }
  main { padding-top: 40px; padding-bottom: 45px; }
  .lead { font-size: 17px; }
  h2 { font-size: 21px; }
  .callout { padding: 16px; }
  .sample { padding: 17px; }
  .site-footer { display: block; }
  .site-footer > * { display: block; margin: 0 0 8px; }
}
@media print {
  body { background: white; }
  .shell { width: 100%; }
  .skip-link, .site-nav, .button { display: none; }
  main { padding: 24px 0; }
  section, .callout { break-inside: avoid; }
}