/* BaizeGen 使用手册 — one stylesheet, no external resources. */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --bg-sidebar: #f8f9fb;
  --bg-code: #f3f4f7;
  --bg-pre: #f5f6f8;
  --border: #e3e6eb;
  --border-strong: #cfd4db;
  --text: #1d232b;
  --text-soft: #4a5562;
  --text-faint: #6b7684;
  --accent: #0e6e66;
  --accent-soft: #e3f2f0;
  --accent-text: #0b5c55;
  --note-bg: #eef5ff;   --note-bd: #2f6fd6;
  --tip-bg: #ecf8f1;    --tip-bd: #1f8a4c;
  --warn-bg: #fff6e6;   --warn-bd: #c27a00;
  --danger-bg: #fdeeee; --danger-bd: #c23b3b;
  --shadow: 0 6px 24px rgba(20, 30, 45, .12);
  --topbar-h: 56px;
  --sidebar-w: 272px;
  --toc-w: 232px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
          "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "WenQuanYi Micro Hei", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", "Cascadia Code", Menlo, Consolas, "Liberation Mono",
          "Noto Sans Mono CJK SC", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12161b;
    --bg-soft: #181d23;
    --bg-sidebar: #151a20;
    --bg-code: #222932;
    --bg-pre: #1a2027;
    --border: #2a323c;
    --border-strong: #3a4450;
    --text: #e3e8ee;
    --text-soft: #b3bdc8;
    --text-faint: #8e99a6;
    --accent: #4fc9bb;
    --accent-soft: #173a37;
    --accent-text: #7fdcd0;
    --note-bg: #16253b;   --note-bd: #5b95ec;
    --tip-bg: #14291e;    --tip-bd: #4cc07e;
    --warn-bg: #2d2412;   --warn-bd: #e0a23a;
    --danger-bg: #301819; --danger-bd: #e06a6a;
    --shadow: 0 6px 24px rgba(0, 0, 0, .45);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #12161b;
  --bg-soft: #181d23;
  --bg-sidebar: #151a20;
  --bg-code: #222932;
  --bg-pre: #1a2027;
  --border: #2a323c;
  --border-strong: #3a4450;
  --text: #e3e8ee;
  --text-soft: #b3bdc8;
  --text-faint: #8e99a6;
  --accent: #4fc9bb;
  --accent-soft: #173a37;
  --accent-text: #7fdcd0;
  --note-bg: #16253b;   --note-bd: #5b95ec;
  --tip-bg: #14291e;    --tip-bd: #4cc07e;
  --warn-bg: #2d2412;   --warn-bd: #e0a23a;
  --danger-bg: #301819; --danger-bd: #e06a6a;
  --shadow: 0 6px 24px rgba(0, 0, 0, .45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--topbar-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.75;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 14px;
  padding: 0 20px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 8px; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand-name { font-weight: 700; font-size: 17px; letter-spacing: .2px; }
.brand-sub { color: var(--text-soft); font-size: 14px; padding-left: 8px; border-left: 1px solid var(--border-strong); }
.version { color: var(--text-faint); font-size: 12.5px; white-space: nowrap; }
.search { position: relative; margin-left: auto; width: 300px; max-width: 42vw; }
.search input {
  width: 100%; height: 34px; padding: 0 12px;
  border: 1px solid var(--border-strong); border-radius: 8px;
  background: var(--bg-soft); color: var(--text);
  font: inherit; font-size: 14px;
}
.search input:focus { outline: 2px solid var(--accent); outline-offset: -1px; background: var(--bg); }
.search-results {
  position: absolute; right: 0; top: 40px;
  width: min(520px, 92vw); max-height: 70vh; overflow: auto;
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow); padding: 6px;
}
.search-results a {
  display: block; padding: 8px 10px; border-radius: 6px; color: var(--text);
}
.search-results a:hover, .search-results a.active { background: var(--accent-soft); text-decoration: none; }
.search-results .sr-title { font-weight: 600; font-size: 14px; }
.search-results .sr-page { color: var(--text-faint); font-size: 12px; margin-left: 6px; font-weight: 400; }
.search-results .sr-snip { color: var(--text-soft); font-size: 13px; line-height: 1.55; margin-top: 2px; }
.search-results mark { background: transparent; color: var(--accent-text); font-weight: 700; }
.search-results .sr-empty { padding: 10px; color: var(--text-faint); font-size: 14px; }
.nav-toggle, .theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text-soft); cursor: pointer;
}
.nav-toggle:hover, .theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.nav-toggle { display: none; }
.theme-toggle .i-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: inline; }
}

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  min-height: calc(100vh - var(--topbar-h));
}
.sidebar {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 18px 14px 40px 18px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  font-size: 14.5px;
}
.nav-group {
  margin: 18px 0 6px; padding-left: 10px;
  color: var(--text-faint); font-size: 12px; font-weight: 600; letter-spacing: .8px;
}
.nav-group:first-child { margin-top: 0; }
.nav-list, .nav-sub { list-style: none; margin: 0; padding: 0; }
.nav-list > li > a {
  display: block; padding: 5px 10px; border-radius: 6px; color: var(--text-soft); line-height: 1.5;
}
.nav-list > li > a:hover { background: var(--bg-soft); color: var(--text); text-decoration: none; }
.nav-list > li.current > a { background: var(--accent-soft); color: var(--accent-text); font-weight: 600; }
.nav-sub { margin: 4px 0 8px 12px; border-left: 1px solid var(--border-strong); }
.nav-sub a {
  display: block; padding: 3px 10px; color: var(--text-faint); font-size: 13.5px; line-height: 1.5;
}
.nav-sub a:hover { color: var(--text); text-decoration: none; }

.content { min-width: 0; padding: 32px 48px 24px; }
.doc { max-width: 880px; margin: 0 auto; }
.page-toc {
  position: sticky; top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
  padding: 28px 18px 40px 8px;
  font-size: 13px;
}
.page-toc .toc-title { margin: 0 0 8px; font-weight: 600; color: var(--text-soft); font-size: 12.5px; letter-spacing: .5px; }
.page-toc ul { list-style: none; margin: 0; padding: 0; }
.page-toc ul ul { padding-left: 12px; }
.page-toc a { display: block; padding: 3px 0 3px 10px; color: var(--text-faint); border-left: 2px solid transparent; line-height: 1.45; }
.page-toc a:hover { color: var(--text); text-decoration: none; }
.page-toc a.active { color: var(--accent-text); border-left-color: var(--accent); }

/* ---------- document typography ---------- */
.doc h1 { font-size: 30px; line-height: 1.3; margin: 0 0 18px; letter-spacing: .2px; }
.doc h2 {
  font-size: 22px; line-height: 1.4; margin: 44px 0 14px; padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.doc h3 { font-size: 18px; line-height: 1.45; margin: 32px 0 10px; }
.doc h4 { font-size: 16px; margin: 24px 0 8px; }
.doc h1 code, .doc h2 code, .doc h3 code, .doc h4 code { font-size: .9em; }
.doc p { margin: 10px 0; }
.doc ul, .doc ol { padding-left: 24px; margin: 10px 0; }
.doc li { margin: 4px 0; }
.doc li > ul, .doc li > ol { margin: 4px 0; }
.doc strong { font-weight: 650; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
.headerlink {
  margin-left: 8px; color: var(--text-faint); opacity: 0; font-weight: 400; font-size: .8em;
  text-decoration: none;
}
.doc h1:hover .headerlink, .doc h2:hover .headerlink, .doc h3:hover .headerlink, .doc h4:hover .headerlink { opacity: 1; }
.headerlink:hover { color: var(--accent); text-decoration: none; }
.lead { font-size: 17px; color: var(--text-soft); }

code {
  font-family: var(--mono); font-size: .88em;
  background: var(--bg-code); border-radius: 4px; padding: .12em .38em;
  white-space: nowrap;
}
@media (max-width: 900px) {
  code { white-space: normal; overflow-wrap: anywhere; }
}
pre {
  position: relative;
  margin: 14px 0; padding: 14px 16px;
  background: var(--bg-pre); border: 1px solid var(--border); border-radius: 8px;
  overflow-x: auto; line-height: 1.6;
}
pre code { background: none; padding: 0; font-size: 13.5px; white-space: pre; word-break: normal; }
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  padding: 2px 9px; font: 12px var(--font);
  color: var(--text-soft); background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  cursor: pointer; opacity: 0; transition: opacity .15s;
}
pre:hover .copy-btn, .copy-btn:focus { opacity: 1; }
@media (hover: none) { .copy-btn { opacity: 1; } }

.table-wrap { overflow-x: auto; margin: 14px 0; border: 1px solid var(--border); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; line-height: 1.6; }
th, td { padding: 8px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: var(--bg-soft); font-weight: 600; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td code { white-space: nowrap; }
td:last-child { min-width: 6.5em; }

/* admonitions (python-markdown "!!! note") */
.admonition {
  margin: 16px 0; padding: 10px 16px 10px 14px;
  border-left: 4px solid var(--note-bd); background: var(--note-bg); border-radius: 0 8px 8px 0;
}
.admonition > p { margin: 6px 0; }
.admonition-title { font-weight: 650; margin-bottom: 2px !important; }
.admonition.tip { border-color: var(--tip-bd); background: var(--tip-bg); }
.admonition.warning { border-color: var(--warn-bd); background: var(--warn-bg); }
.admonition.danger { border-color: var(--danger-bd); background: var(--danger-bg); }
.admonition pre { background: var(--bg); }

/* definition-like option lists */
dl { margin: 12px 0; }
dt { font-family: var(--mono); font-size: 14px; font-weight: 600; margin-top: 12px; }
dd { margin: 4px 0 0 22px; color: var(--text-soft); }

/* pipeline diagram */
.flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 8px; margin: 18px 0 22px; }
.flow .step {
  flex: 1 1 140px; min-width: 130px;
  border: 1px solid var(--border-strong); border-radius: 10px; padding: 10px 12px;
  background: var(--bg-soft); font-size: 13.5px; line-height: 1.55;
}
.flow .step b { display: block; font-size: 14.5px; color: var(--text); }
.flow .step code { font-size: 12.5px; }
.flow .step .opt { color: var(--text-faint); font-size: 12.5px; }
.flow .step.data { background: var(--accent-soft); border-color: transparent; }
.flow .arrow { display: flex; align-items: center; color: var(--text-faint); font-size: 18px; }

/* feature cards on the home page */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; margin: 16px 0; }
.card {
  display: block; border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px;
  color: var(--text); background: var(--bg);
}
a.card:hover { border-color: var(--accent); text-decoration: none; }
.card b { display: block; margin-bottom: 4px; font-size: 15px; }
.card span { color: var(--text-soft); font-size: 13.5px; line-height: 1.6; display: block; }

/* pager & footer */
.pager { max-width: 880px; margin: 48px auto 0; display: flex; justify-content: space-between; gap: 12px; }
.pager a {
  flex: 0 1 48%; display: block; padding: 12px 16px;
  border: 1px solid var(--border); border-radius: 10px; color: var(--text); font-weight: 600;
}
.pager a:hover { border-color: var(--accent); text-decoration: none; }
.pager a span { display: block; color: var(--text-faint); font-size: 12.5px; font-weight: 400; }
.pager .next { text-align: right; margin-left: auto; }
.footer { max-width: 880px; margin: 36px auto 0; padding: 18px 0 10px; border-top: 1px solid var(--border); color: var(--text-faint); font-size: 13px; }

/* ---------- responsive ---------- */
@media (max-width: 1240px) {
  .layout { grid-template-columns: var(--sidebar-w) minmax(0, 1fr); }
  .page-toc { display: none; }
}
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .nav-toggle { display: inline-flex; }
  .version { display: none; }
  .sidebar {
    position: fixed; z-index: 40; left: 0; top: var(--topbar-h); bottom: 0;
    width: min(86vw, 320px); height: auto;
    transform: translateX(-102%); transition: transform .2s ease;
    box-shadow: var(--shadow);
  }
  body.nav-open .sidebar { transform: none; }
  .scrim { position: fixed; inset: var(--topbar-h) 0 0 0; z-index: 35; background: rgba(0, 0, 0, .35); }
  .content { padding: 22px 16px 20px; }
  .doc h1 { font-size: 25px; }
  .doc h2 { font-size: 20px; }
}
@media (max-width: 600px) {
  .topbar { gap: 8px; padding: 0 12px; }
  .brand-sub { display: none; }
  .search { max-width: none; width: auto; flex: 1; }
  .pager { flex-direction: column; }
  .pager a { flex-basis: auto; }
}
@media print {
  .topbar, .sidebar, .page-toc, .pager, .copy-btn { display: none !important; }
  .layout { display: block; }
  .content { padding: 0; }
}

/* ---------- benchmark charts (build.py: ```benchmark blocks) ---------- */
:root {
  --bench-ref: #8f8d86;
  --bench-cpu: #2a78d6;
  --bench-gpu: #eb6834;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bench-ref: #85847d; --bench-cpu: #3987e5; --bench-gpu: #d95926; }
}
:root[data-theme="dark"] { --bench-ref: #85847d; --bench-cpu: #3987e5; --bench-gpu: #d95926; }

.bench {
  margin: 18px 0 26px; padding: 16px 18px 12px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
}
.bench figcaption { font-weight: 650; font-size: 15px; margin-bottom: 6px; }
.bench-legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0 0 6px; font-size: 13px; color: var(--text-soft); }
.bench-key { display: inline-flex; align-items: center; gap: 6px; }
.bench-swatch { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.bench-group { padding: 10px 0 8px; border-top: 1px solid var(--border); }
.bench-group:first-of-type { border-top: 0; }
.bench-glabel { font-weight: 600; font-size: 14px; margin-bottom: 2px; }
.bench-gnote { font-size: 12.5px; color: var(--text-faint); margin-bottom: 4px; line-height: 1.5; }
.bench-row {
  display: grid; grid-template-columns: minmax(120px, 30%) minmax(0, 1fr) 10.5em;
  align-items: center; gap: 10px; padding: 3px 0; font-size: 13px; cursor: default;
}
.bench-row:hover .bench-track { background: var(--bg-soft); }
.bench-name { color: var(--text-soft); line-height: 1.35; }
.bench-track { position: relative; height: 16px; border-radius: 4px; }
.bench-bar { display: block; height: 100%; border-radius: 0 4px 4px 0; min-width: 3px; }
.s-ref { background: var(--bench-ref); }
.s-cpu { background: var(--bench-cpu); }
.s-gpu { background: var(--bench-gpu); }
.bench-val { white-space: nowrap; color: var(--text); font-variant-numeric: tabular-nums; }
.bench-x {
  margin-left: 8px; padding: 0 6px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent-text); font-weight: 650; font-size: 12px;
}
.bench-foot { margin: 8px 0 0; font-size: 12.5px; color: var(--text-faint); }
@media (max-width: 600px) {
  .bench { padding: 12px 12px 10px; }
  .bench-row { grid-template-columns: minmax(0, 1fr) 10em; gap: 2px 8px; }
  .bench-name { grid-column: 1 / -1; }
}