:root {
  color-scheme: dark;
  --canvas: #090d12;
  --surface-subtle: #0f151c;
  --surface: #151c24;
  --surface-raised: #1c2630;
  --border: #34414e;
  --border-subtle: #26313c;
  --text: #edf2f7;
  --text-secondary: #b7c2ce;
  --text-muted: #8492a1;
  --primary: #4f8cff;
  --primary-hover: #75a6ff;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei UI", "Noto Sans CJK SC", "Noto Sans SC", system-ui, sans-serif;
  background: var(--canvas);
  color: var(--text);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; font-size: 14px; line-height: 1.6; }
a { color: var(--primary-hover); }
a:hover { color: var(--text); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; }
.skip-link { position: absolute; top: -100px; left: 12px; z-index: 5; padding: 8px 12px; background: var(--surface-raised); }
.skip-link:focus { top: 10px; }
.public-header { border-bottom: 1px solid var(--border-subtle); background: var(--surface-subtle); }
.public-header-inner { width: min(100%, 1440px); min-height: 56px; margin: auto; padding: 0 16px; display: flex; align-items: center; gap: 24px; }
.public-brand { display: inline-flex; gap: 8px; align-items: center; flex: 0 0 auto; color: var(--text); font-size: 16px; font-weight: 600; text-decoration: none; }
.brand-mark { display: inline-grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--primary); border-radius: 4px; color: var(--primary); font-weight: 700; }
.public-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; min-width: 0; }
.public-nav a, .language-link { display: inline-flex; align-items: center; min-height: 36px; padding: 4px 12px; border-radius: 4px; color: var(--text-secondary); text-decoration: none; white-space: nowrap; }
.public-nav a:hover, .language-link:hover, .public-nav a[aria-current] { color: var(--text); background: var(--surface-raised); }
.public-nav a[aria-current] { box-shadow: inset 0 -2px var(--primary); }
.language-link { margin-left: auto; }
.public-layout { width: min(100%, 1100px); min-height: calc(100vh - 146px); margin: auto; padding: 24px 16px 40px; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; color: var(--text-muted); font-size: 12px; }
.breadcrumbs a { color: var(--text-secondary); }
.page-grid { display: grid; grid-template-columns: minmax(0, 720px) minmax(180px, 240px); gap: 40px; align-items: start; margin-top: 16px; }
.public-article { min-width: 0; }
.eyebrow { margin: 32px 0 12px; color: var(--primary); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
h1 { margin: 0 0 24px; font-size: 32px; line-height: 1.2; font-weight: 600; letter-spacing: -.02em; }
h2 { margin: 32px 0 12px; padding-top: 8px; border-top: 1px solid var(--border-subtle); font-size: 20px; line-height: 1.4; font-weight: 600; scroll-margin-top: 20px; }
.public-article p, .public-article li { color: var(--text-secondary); }
.public-article p { margin: 0 0 16px; }
.public-article ul { margin: 0 0 16px; padding-left: 24px; }
.public-article li { margin: 8px 0; }
.public-article strong { color: var(--text); font-weight: 600; }
.heading-anchor { font-size: 14px; text-decoration: none; opacity: .7; }
.page-toc { position: sticky; top: 24px; border-left: 1px solid var(--border); padding-left: 16px; color: var(--text-secondary); }
.page-toc strong { font-size: 14px; color: var(--text); }
.page-toc ul { list-style: none; margin: 8px 0 0; padding: 0; }
.page-toc li { margin: 8px 0; }
.page-toc a { color: var(--text-secondary); text-decoration: none; }
.page-toc a:hover { color: var(--primary-hover); }
.public-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 32px; }
.public-actions a { display: inline-flex; min-height: 40px; align-items: center; justify-content: center; border-radius: 4px; padding: 8px 16px; font-weight: 600; text-decoration: none; }
.primary-action { background: var(--primary); color: #07111d; }
.primary-action:hover { background: var(--primary-hover); color: #07111d; }
.secondary-action { border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.secondary-action:hover { border-color: var(--primary); color: var(--text); }
.public-visual { margin: 24px 0; }
.public-visual img { display: block; width: 100%; height: auto; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); }
.public-visual figcaption { margin-top: 8px; color: var(--text-muted); font-size: 12px; }
.article-list { display: grid; gap: 8px; margin: 24px 0 32px; }
.article-list a { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 44px; padding: 10px 12px; border: 1px solid var(--border-subtle); border-radius: 4px; color: var(--text); text-decoration: none; }
.article-list a:hover { border-color: var(--primary); background: var(--surface); }
.updated { margin-top: 32px !important; border-top: 1px solid var(--border-subtle); padding-top: 12px; color: var(--text-muted) !important; font-size: 12px; }
.public-footer { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; width: min(100%, 1440px); min-height: 48px; margin: auto; border-top: 1px solid var(--border-subtle); padding: 8px 16px; color: var(--text-muted); font-size: 12px; }
.public-footer a { color: var(--text-secondary); }
.public-footer span { margin-left: auto; }
@media (max-width: 768px) {
  .public-header-inner { gap: 8px; flex-wrap: wrap; padding: 8px 12px; }
  .public-brand { flex: 1 1 auto; }
  .public-nav { order: 3; flex: 1 0 100%; gap: 0; }
  .public-nav a { padding: 4px 10px; }
  .language-link { margin-left: 0; }
  .page-grid { grid-template-columns: 1fr; gap: 24px; margin-top: 24px; }
  .page-toc { order: -1; position: static; border-left: 0; border-bottom: 1px solid var(--border); padding: 0 0 12px; }
  .page-toc ul { display: flex; flex-wrap: wrap; gap: 4px 16px; }
  h1 { font-size: 32px; }
}
@media (max-width: 390px) {
  .public-nav a { padding: 4px 7px; font-size: 12px; }
  .visual-columns { grid-template-columns: 1fr; }
  .visual-column { min-height: 86px; }
  .visual-bars { display: none; }
  .public-actions a { width: 100%; min-height: 44px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}