:root {
  color-scheme: light;
  --paper: #ffffff;
  --ink: #202b2a;
  --muted: #526360;
  --line: #d7e1de;
  --accent: #006b5c;
  --soft: #f2f8f5;
  --warning: #81334d;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  letter-spacing: 0;
  scrollbar-color: #a2bbb0 var(--soft);
  accent-color: var(--accent);
}
* { box-sizing: border-box; }
body { margin: 0; font-size: 16px; line-height: 1.75; }
::selection { color: #143c30; background: #d4eee1; }
a { color: var(--accent); text-underline-offset: 4px; text-decoration-thickness: 1px; overflow-wrap: anywhere; }
a:hover { color: #004e43; text-decoration-thickness: 2px; }
a:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 2px; }
.skip-link { position: absolute; left: 20px; top: -90px; background: var(--paper); padding: 12px 18px; z-index: 10; }
.skip-link:focus { top: 12px; }
.site-header { border-bottom: 1px solid var(--line); }
.header-inner { max-width: 1192px; padding: 20px 36px; margin: auto; display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-height: 44px; }
.brand img { flex: none; border-radius: 8px; width: 44px; height: 44px; }
.brand > span { font-weight: 650; font-size: 18px; line-height: 1.3; }
.brand-local { font-size: 13px; font-weight: 450; color: var(--muted); margin-left: 9px; white-space: nowrap; }
.page-nav { display: flex; gap: 20px; margin-left: 26px; align-items: center; flex-wrap: wrap; }
.page-nav a, .language-nav a { display: inline-flex; align-items: center; min-height: 44px; text-decoration: none; color: var(--muted); }
.page-nav a[aria-current], .language-nav a[aria-current] { color: var(--accent); text-decoration: underline; text-decoration-thickness: 2px; font-weight: 600; }
.page-nav a:hover, .language-nav a:hover { text-decoration: underline; }
.language-nav { margin-left: auto; display: flex; align-items: center; gap: 16px; font-size: 14px; flex-wrap: wrap; }
.page-shell { max-width: 1192px; padding: 48px 36px 64px; margin: auto; }
.document-heading { padding: 0 0 34px; margin-bottom: 32px; border-bottom: 1px solid var(--line); }
h1 { font-size: 34px; line-height: 1.3; font-weight: 650; margin: 0 0 14px; overflow-wrap: anywhere; text-wrap: balance; }
.document-meta { color: var(--muted); font-size: 14px; margin: 0 0 8px; font-variant-numeric: tabular-nums; }
.contact-link { display: inline-flex; align-items: center; min-height: 44px; font-weight: 600; }
.reading-layout { display: grid; grid-template-columns: minmax(170px, 220px) minmax(0, 720px); gap: 56px; align-items: start; }
.desktop-toc { position: sticky; top: 24px; max-height: calc(100vh - 48px); overflow-y: auto; scrollbar-width: thin; padding-right: 8px; }
.toc-title { font-size: 14px; margin: 0 0 12px; color: var(--muted); font-weight: 650; }
.desktop-toc ul, .mobile-toc ul { padding: 0; margin: 0; list-style: none; }
.desktop-toc li { margin: 0 0 9px; }
.desktop-toc a { font-size: 13px; line-height: 1.5; display: block; padding: 3px 0; text-decoration: none; color: var(--muted); }
.desktop-toc a:hover { color: var(--accent); text-decoration: underline; }
.document { min-width: 0; max-width: 720px; }
.document p { margin: 0 0 18px; }
.document h2 { font-size: 22px; line-height: 1.5; font-weight: 650; margin: 0 0 14px; scroll-margin-top: 24px; text-wrap: balance; overflow-wrap: anywhere; }
.document section { margin-top: 34px; padding-top: 28px; border-top: 1px solid var(--line); }
.document section:first-of-type { margin-top: 28px; }
.document ul, .document ol { padding-left: 24px; margin: 0 0 20px; }
.document li { margin-bottom: 7px; padding-left: 3px; }
.document li::marker { color: var(--accent); }
.document-intro { margin-bottom: 18px; }
.support .document-intro p:last-child { color: var(--warning); }
.mobile-toc { display: none; }
.site-footer { border-top: 1px solid var(--line); background: var(--soft); }
.site-footer > div { max-width: 1192px; margin: auto; padding: 30px 36px; display: flex; justify-content: space-between; gap: 16px 32px; flex-wrap: wrap; font-size: 14px; }
.site-footer p { margin: 10px 0; color: var(--muted); }
.site-footer nav { display: flex; gap: 8px 24px; flex-wrap: wrap; align-items: center; }
.site-footer a { display: inline-flex; align-items: center; min-height: 44px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; clip-path: inset(50%); overflow: hidden; white-space: nowrap; }
.error-page { max-width: 760px; margin: 0 auto; padding: 72px 24px; }
@media (max-width: 1000px) {
  .header-inner { gap: 8px 24px; }
  .page-nav { margin-left: auto; }
  .language-nav { width: 100%; justify-content: flex-end; }
  .reading-layout { grid-template-columns: minmax(160px, 190px) minmax(0, 1fr); gap: 32px; }
}
@media (max-width: 760px) {
  .header-inner { padding: 16px 24px; gap: 8px 20px; }
  .brand { flex-basis: 100%; }
  .page-nav { margin-left: 0; gap: 20px; }
  .language-nav { width: auto; margin-left: auto; justify-content: flex-start; gap: 14px; }
  .page-shell { padding: 32px 24px 44px; }
  h1 { font-size: 28px; }
  .document-heading { padding-bottom: 22px; margin-bottom: 22px; }
  .reading-layout { display: block; }
  .desktop-toc { display: none; }
  .mobile-toc { display: block; border-bottom: 1px solid var(--line); padding-bottom: 18px; margin: 0 0 28px; }
  .mobile-toc summary { color: var(--accent); font-weight: 600; cursor: pointer; min-height: 44px; padding: 6px 0; }
  .mobile-toc nav { padding-top: 14px; }
  .mobile-toc a { display: block; padding: 8px 0; }
  .document h2 { font-size: 21px; }
  .document section { margin-top: 28px; padding-top: 24px; }
  .site-footer > div { padding: 24px; display: block; }
}
@media (max-width: 500px) {
  .page-nav, .language-nav { width: 100%; margin: 0; }
  .header-inner { gap: 0 18px; }
  .language-nav { border-top: 1px solid var(--line); padding-top: 4px; }
}
@media print {
  .site-header, .desktop-toc, .mobile-toc, .skip-link { display: none; }
  .page-shell { padding: 0; }
  .reading-layout { display: block; }
  .document { max-width: none; }
  h2 { break-after: avoid; }
  a { color: inherit; }
  .site-footer { background: none; }
}