:root{
    --navy:#2c3e56;--teal:#1c6b5b;--gold:#c39a45;
    --ink:#1b2431;--muted:#6a7484;--line:#e7e3d9;
    --bg:#f7f5f0;--card:#ffffff;
    --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Segoe UI",Roboto,sans-serif;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{font-family:var(--font);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;line-height:1.78;}
  a{color:var(--teal);text-decoration:none;}
  a:hover{text-decoration:underline;}

  header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(247,245,240,.82);border-bottom:1px solid var(--line);}
  .nav{max-width:820px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:62px;}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:16px;color:var(--ink);}
  .brand img{width:30px;height:30px;border-radius:8px;box-shadow:0 2px 8px rgba(28,40,60,.14);}
  .back{font-size:14px;font-weight:600;color:var(--teal);}

  .doc{max-width:820px;margin:0 auto;padding:56px 24px 80px;}
  .doc h1{font-size:32px;font-weight:800;margin-bottom:8px;}
  .meta{font-size:14px;color:var(--muted);margin-bottom:36px;padding-bottom:20px;border-bottom:1px solid var(--line);}
  .doc h2{font-size:22px;font-weight:700;margin-top:38px;margin-bottom:12px;padding-top:20px;border-top:1px solid var(--line);}
  .doc h3{font-size:17px;font-weight:700;margin-top:22px;margin-bottom:6px;}
  .doc p,.doc li{font-size:15.5px;color:#333840;}
  .doc ul,.doc ol{padding-left:22px;margin:10px 0;}
  .doc li{margin-bottom:8px;}
  .doc strong{color:var(--ink);}
  .doc hr{border:none;height:1px;background:var(--line);margin:32px 0;}

  footer{border-top:1px solid var(--line);padding:32px 0;text-align:center;font-size:13px;color:var(--muted);}
  footer a{color:var(--muted);}
  footer a:hover{color:var(--teal);}
  footer{padding-left:20px;padding-right:20px;}
  a:focus-visible{outline:3px solid var(--teal);outline-offset:4px;}
  @media(max-width:380px){.nav{padding:12px 18px;height:auto;gap:10px;flex-wrap:wrap;}}
  @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}