:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --text: #1d1f22;
  --muted: #5d636b;
  --line: #e3e0da;
  --accent: #0b6e69;
  --accent-soft: #e4f2f1;
  --tip: #2f6b2f;
  --tip-soft: #ebf4e8;
  --warn: #8a4b00;
  --warn-soft: #fbf0e0;
  --code-bg: #f1efeb;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171a;
    --surface: #1c1f23;
    --text: #e8e6e1;
    --muted: #a3a8ae;
    --line: #30343a;
    --accent: #5cc2bb;
    --accent-soft: #173533;
    --tip: #8fcf8a;
    --tip-soft: #1d2d1b;
    --warn: #f0b467;
    --warn-soft: #33260f;
    --code-bg: #24282d;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #15171a;
  --surface: #1c1f23;
  --text: #e8e6e1;
  --muted: #a3a8ae;
  --line: #30343a;
  --accent: #5cc2bb;
  --accent-soft: #173533;
  --tip: #8fcf8a;
  --tip-soft: #1d2d1b;
  --warn: #f0b467;
  --warn-soft: #33260f;
  --code-bg: #24282d;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
a { color: var(--accent); text-underline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--surface); padding: 4px 8px; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px 16px; border-bottom: 1px solid var(--line); background: var(--surface);
}
.brand { display: flex; flex-direction: column; text-decoration: none; color: var(--text); line-height: 1.3; }
.brand-name { font-weight: 650; }
.brand-sub { font-size: 13px; color: var(--muted); }
.lang {
  font-size: 14px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px;
  text-decoration: none; color: var(--text); white-space: nowrap;
}

.layout { max-width: 1040px; margin: 0 auto; padding: 0 16px; display: grid; gap: 32px; grid-template-columns: 220px minmax(0, 1fr); }
.toc { padding-top: 32px; }
.toc ol { list-style: none; margin: 0; padding: 0; position: sticky; top: 24px; }
.toc a { display: block; padding: 6px 10px; border-radius: 8px; text-decoration: none; color: var(--muted); font-size: 15px; }
.toc a:hover { color: var(--text); }
.toc a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main { padding: 32px 0 48px; min-width: 0; }
main.root { max-width: 480px; margin: 0 auto; padding: 64px 16px; }
h1 { font-size: 30px; line-height: 1.3; margin: 0 0 16px; letter-spacing: -0.01em; }
h2 { font-size: 21px; line-height: 1.35; margin: 40px 0 10px; padding-top: 8px; border-top: 1px solid var(--line); }
h3 { font-size: 17px; margin: 28px 0 8px; }
p, ul, ol { margin: 0 0 14px; }
li { margin: 4px 0; }
ul, ol { padding-left: 1.4em; }
code {
  font: 0.9em/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg); padding: 1px 5px; border-radius: 4px; overflow-wrap: anywhere;
}
pre { background: var(--code-bg); padding: 12px 14px; border-radius: 8px; overflow-x: auto; margin: 0 0 14px; }
pre code { background: none; padding: 0; overflow-wrap: normal; }

.note { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 0 0 16px; }
.note.tip { border-color: var(--tip); background: var(--tip-soft); }
.note.warning { border-color: var(--warn); background: var(--warn-soft); }
.note p { margin: 0 0 6px; }
.note p:last-child { margin: 0; }
.note-label { font-weight: 650; font-size: 14px; }

.table-wrap { overflow-x: auto; margin: 0 0 16px; border: 1px solid var(--line); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--surface); }
th, td { text-align: left; vertical-align: top; padding: 8px 12px; border-bottom: 1px solid var(--line); }
tr:last-child td { border-bottom: 0; }
th { font-weight: 600; background: var(--code-bg); }

footer { max-width: 1040px; margin: 0 auto; padding: 20px 16px 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--line); }
footer p { margin: 0 0 6px; }

@media (max-width: 760px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .toc { padding-top: 16px; }
  .toc ol { position: static; display: flex; flex-wrap: wrap; gap: 6px; }
  .toc a { border: 1px solid var(--line); padding: 4px 10px; font-size: 14px; }
  main { padding-top: 16px; }
  h1 { font-size: 26px; }
}