:root{
  --bg:#f6f8fb;
  --card:#ffffff;
  --ink:#172033;
  --muted:#5c6a7d;
  --line:#d9e2ef;
  --blue:#2463a7;
  --blue-soft:#e8f1fb;
  --slate:#edf2f7;
  --warn:#fff7ed;
  --warn-line:#fed7aa;
  --ok:#edfdf5;
  --ok-line:#bbf7d0;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);line-height:1.62}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.header{background:linear-gradient(135deg,#e8f1fb,#f7fafc);border-bottom:1px solid var(--line);padding:28px 20px}
.container{max-width:1060px;margin:0 auto;padding:0 20px}
.header h1{margin:0 0 6px;font-size:30px;line-height:1.2}.header p{margin:0;color:var(--muted)}
.nav{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.nav a{padding:8px 12px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#23384f;font-size:14px}
.main{padding:28px 0 48px}.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;margin:0 0 18px;box-shadow:0 8px 24px rgba(30,50,80,.05)}
h2{margin:26px 0 10px;font-size:22px}h3{margin:20px 0 8px;font-size:18px}h4{margin:16px 0 6px;font-size:15px}
ul,ol{padding-left:22px}.muted{color:var(--muted)}.small{font-size:13px}.placeholder{background:#fff1f2;border:1px solid #fecdd3;color:#9f1239;border-radius:8px;padding:1px 6px;font-weight:600}.notice{background:var(--warn);border:1px solid var(--warn-line);border-radius:14px;padding:14px 16px;margin:16px 0}.ok{background:var(--ok);border:1px solid var(--ok-line);border-radius:14px;padding:14px 16px;margin:16px 0}.toc{columns:2;column-gap:30px}.toc li{break-inside:avoid;margin-bottom:6px}
table{width:100%;border-collapse:collapse;margin:14px 0;border:1px solid var(--line);background:#fff}th,td{padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}th{background:var(--slate);font-weight:700}.footer{border-top:1px solid var(--line);padding:18px 0 34px;color:var(--muted);font-size:13px}.badge{display:inline-block;background:var(--blue-soft);border:1px solid #bfdbfe;color:#1d4e89;border-radius:999px;padding:3px 8px;font-size:12px;font-weight:700}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}.tile{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.tile h3{margin-top:0}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:2px 6px}
@media(max-width:760px){.toc{columns:1}.header h1{font-size:24px}.card{padding:18px}.container{padding:0 14px}}