:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #656d76;
  --line: #d8dee4;
  --soft: #f6f8fa;
  --accent: #0969da;
  --accent-soft: #ddf4ff;
  --code: rgba(175, 184, 193, 0.2);
  --max: 1180px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #8d96a0;
    --line: #30363d;
    --soft: #161b22;
    --accent: #4493f8;
    --accent-soft: #121d2f;
    --code: rgba(110, 118, 129, 0.4);
  }
}

* { box-sizing: border-box; }
html { scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--fg); font-size: 15px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--code);
  padding: 0.1em 0.35em;
  border-radius: 5px;
}
[hidden] { display: none !important; }

/* Only the active language is visible. */
html[data-lang="en"] .l-zh,
html[data-lang="zh"] .l-en { display: none; }

/* Header */
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.top-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { font-weight: 600; color: var(--fg); }
.top-actions { display: flex; align-items: center; gap: 14px; }
.gh { color: var(--fg); display: flex; }
.lang-switch { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang-switch button {
  font: inherit;
  font-size: 13px;
  padding: 4px 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.lang-switch button[aria-pressed="true"] { background: var(--soft); color: var(--fg); font-weight: 600; }

/* Layout */
.layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 48px;
}
.toc {
  position: sticky;
  top: 64px;
  align-self: start;
  max-height: calc(100vh - 64px);
  overflow-y: auto;
  padding: 32px 0;
}
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc li { display: flex; justify-content: space-between; gap: 8px; font-size: 14px; }
.toc a { color: var(--muted); padding: 4px 0; display: block; }
.toc a.active { color: var(--fg); font-weight: 600; }
.toc li.dim { opacity: 0.4; }
.toc .count { color: var(--muted); font-size: 12px; padding-top: 6px; }
main { padding: 32px 0 64px; min-width: 0; }

/* Hero */
.hero h1 { font-size: 34px; margin: 8px 0 8px; letter-spacing: -0.02em; }
.tagline { font-size: 18px; color: var(--muted); margin: 0 0 16px; }
.intro p { margin: 0 0 12px; max-width: 760px; }
.search-row { position: sticky; top: 52px; z-index: 5; background: var(--bg); padding: 12px 0; display: flex; align-items: center; gap: 12px; }
#search {
  flex: 1;
  font: inherit;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--soft);
  color: var(--fg);
  outline: none;
}
#search:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.search-status { color: var(--muted); font-size: 13px; white-space: nowrap; }

/* Sections */
.section { margin-top: 36px; }
.section h2 {
  font-size: 22px;
  margin: 0 0 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.section h2 .anchor { color: var(--fg); }
.count {
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
}
.section h2 .count { background: var(--soft); border: 1px solid var(--line); border-radius: 999px; padding: 0 8px; }
.section h3 { font-size: 16px; margin: 24px 0 4px; color: var(--muted); }
.note { color: var(--muted); margin: 8px 0; font-size: 14px; }

.entries { list-style: none; margin: 0; padding: 0; }
.entry { padding: 12px 0; border-bottom: 1px solid var(--line); }
.entry:last-child { border-bottom: 0; }
.entry-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: 4px 10px; }
.entry-name { font-weight: 600; font-size: 15.5px; }
.host { font-size: 12px; color: var(--muted); }
.desc { margin: 2px 0 0; }
.children { margin: 6px 0 0; padding-left: 18px; font-size: 14px; color: var(--muted); }
.children .entry-head { display: inline-flex; }
.children .entry-name { font-weight: 500; font-size: 14px; }
.children .host { display: none; }
.children .desc { display: inline; margin: 0; }
.children .entry-head + .desc { margin-left: 6px; }

.empty { margin-top: 32px; color: var(--muted); }

/* Footer */
.footer { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.footer h3 { font-size: 14px; margin: 0 0 4px; color: var(--fg); }
.footer-block { margin-bottom: 16px; }
.footer p { margin: 0; }
.build { margin-top: 24px !important; font-size: 12px; }

@media (max-width: 860px) {
  .layout { display: block; }
  .toc { display: none; }
  .top-inner, .layout { padding-left: 16px; padding-right: 16px; }
  .hero h1 { font-size: 28px; }
}