:root{--paper:#F3F6F2;--surface:#fff;--ink:#17263A;--muted:#5A6878;--line:#D3DBD2;color-scheme:light;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root{--paper:#0F151C;--surface:#18212B;--ink:#E5EBF1;--muted:#9AA8B6;--line:#2C3946;color-scheme:dark}}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 "Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
.doc{max-width:720px;margin:0 auto;padding:24px 18px 48px}
h1{font:600 1.7rem/1.25 Georgia,"Times New Roman",serif;margin:8px 0 6px}
h2{font-size:1.05rem;margin:28px 0 8px}
.ver{color:var(--muted);font-size:.9rem;margin:0 0 18px}
.back a,a{color:inherit}
.back{font-size:.9rem;margin:0}
ul{padding-left:1.2em}li{margin:4px 0}
table{border-collapse:collapse;width:100%;font-size:.9rem;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
th{background:var(--surface)}