:root { --indigo:#1B2A6B; --blue:#527AF2; --link:#355FEA; }
  body { margin:0; font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
         color:#1b2444; background:#f4f7ff; -webkit-font-smoothing:antialiased; }
  header { background:linear-gradient(135deg,var(--indigo),var(--blue)); color:#fff; padding:40px 24px; }
  header .in { max-width:760px; margin:0 auto; display:flex; align-items:center; gap:16px; }
  header img { width:56px; height:56px; border-radius:14px; }
  header h1 { margin:0; font-size:26px; font-weight:800; }
  header a { color:#dbe6ff; font-size:14px; text-decoration:none; }
  main { max-width:760px; margin:0 auto; padding:36px 24px 80px; }
  h2 { font-size:19px; margin:30px 0 8px; color:#142a6b; }
  p, li { color:#27345c; }
  a { color:var(--link); }
  .muted { color:#5f6b92; font-size:14px; }
  code { background:#e7edff; padding:1px 6px; border-radius:6px; font-size:14px; overflow-wrap:anywhere; }
  .box { background:#fff; border:1px solid #e2e9ff; border-radius:14px; padding:4px 22px 18px; margin-top:18px; }