:root {
  --ink-900: #12203a;
  --ink-700: #2a3b55;
  --ink-500: #5b6b82;
  --ink-200: #d7deea;
  --ink-50: #f4f7fb;
  --brand: #1d4ed8;
  --brand-ink: #163ea8;
  --paper: #fff;
  --max: 72rem;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink-900);
  background: var(--paper);
  font: 16px/1.7 "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.geo-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.geo-wrap { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }
.geo-header { border-bottom: 1px solid var(--ink-200); background: #fff; position: sticky; top: 0; z-index: 20; }
.geo-header-inner { display: flex; align-items: center; gap: 1.25rem; min-height: 4rem; flex-wrap: wrap; }
.geo-brand { color: var(--ink-900); display: flex; flex-direction: column; line-height: 1.2; }
.geo-brand span { color: var(--ink-500); font-size: .8rem; }
.geo-nav { display: flex; gap: 1rem; flex: 1; }
.geo-nav a { color: var(--ink-700); }
.geo-search { display: flex; gap: .4rem; }
.geo-search input {
  border: 1px solid var(--ink-200);
  border-radius: 8px;
  padding: .4rem .7rem;
  min-width: 12rem;
}
.geo-search button {
  border: 0;
  background: var(--brand);
  color: #fff;
  border-radius: 8px;
  padding: .4rem .8rem;
  cursor: pointer;
}
.geo-main { padding: 2rem 0 4rem; min-height: 60vh; }
.geo-hero { margin-bottom: 2rem; }
.geo-hero h1, .geo-article h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 .6rem; }
.geo-kicker { color: var(--brand); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; margin: 0 0 .4rem; }
.geo-lead { color: var(--ink-500); font-size: 1.05rem; margin: 0 0 .6rem; }
.geo-meta { color: var(--ink-500); font-size: .9rem; }
.geo-desc { color: var(--ink-500); }
.geo-cat { margin: 2.5rem 0; }
.geo-cat h2 { margin: 0 0 .8rem; }
.geo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 1rem; }
.geo-card { border: 1px solid var(--ink-200); border-radius: 12px; padding: 1rem 1.1rem; background: var(--ink-50); }
.geo-card h2, .geo-card h3 { margin: 0 0 .6rem; font-size: 1.05rem; }
.geo-card ul, .geo-side ul, .geo-toc ul, .geo-related ul { margin: 0; padding: 0; list-style: none; }
.geo-card li { margin: .3rem 0; }
.geo-crumbs { display: flex; flex-wrap: wrap; gap: .4rem; color: var(--ink-500); font-size: .9rem; margin-bottom: 1.2rem; }
.geo-crumbs a { color: var(--ink-500); }
.geo-article-layout { display: grid; grid-template-columns: 14rem minmax(0, 1fr) 12rem; gap: 2rem; align-items: start; }
.geo-article-layout .geo-crumbs { grid-column: 1 / -1; }
.geo-side, .geo-toc { position: sticky; top: 5.2rem; }
.geo-side-title { font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-500); margin: 0 0 .6rem; }
.geo-side li, .geo-toc li { border-left: 2px solid transparent; padding: .25rem 0 .25rem .7rem; }
.geo-side li.is-current { border-left-color: var(--brand); font-weight: 600; }
.geo-toc li.lv3 { padding-left: 1.2rem; }
.geo-toc li.lv4 { padding-left: 1.7rem; }
.geo-prose { margin-top: 1.5rem; }
.geo-prose h2 { font-size: 1.35rem; margin: 2rem 0 .7rem; }
.geo-prose h3 { font-size: 1.15rem; margin: 1.4rem 0 .5rem; }
.geo-prose p, .geo-prose li { color: var(--ink-700); }
.geo-prose blockquote {
  margin: 0 0 1.2rem;
  padding: .9rem 1rem;
  background: #eef4ff;
  border-left: 4px solid var(--brand);
  border-radius: 0 10px 10px 0;
}
.geo-prose blockquote#summary { font-size: 1.05rem; }
.geo-prose img { max-width: 100%; height: auto; }
.geo-prose table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.geo-prose th, .geo-prose td { border: 1px solid var(--ink-200); padding: .5rem .6rem; text-align: left; }
.geo-related { margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--ink-200); }
.geo-list { list-style: none; padding: 0; margin: 0; }
.geo-list li { border-bottom: 1px solid var(--ink-200); }
.geo-list a { display: block; padding: 1rem 0; color: inherit; }
.geo-list h2 { margin: 0 0 .3rem; font-size: 1.15rem; color: var(--ink-900); }
.geo-list p { margin: 0; color: var(--ink-500); }
.geo-footer { border-top: 1px solid var(--ink-200); padding: 1.5rem 0 2rem; color: var(--ink-500); font-size: .9rem; }
.geo-langs { display: flex; flex-wrap: wrap; gap: .4rem .7rem; font-size: .85rem; }
.geo-langs a[aria-current="true"] { font-weight: 600; color: var(--ink-900); }
.geo-fallback {
  margin: 0 0 1.2rem;
  padding: .8rem 1rem;
  background: #fff7e6;
  border: 1px solid #f0d08a;
  border-radius: 10px;
  color: #6b4f12;
  font-size: .95rem;
}
.geo-vote { margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--ink-200); }
.geo-vote button {
  margin-right: .4rem;
  border: 1px solid var(--ink-200);
  background: #fff;
  border-radius: 8px;
  padding: .35rem .8rem;
  cursor: pointer;
}
.geo-vote-count, .geo-available { color: var(--ink-500); font-size: .9rem; }
.geo-available a { margin-right: .6rem; }
.geo-langs { display: flex; flex-wrap: wrap; gap: .45rem; }
.geo-langs a { color: var(--ink-700); font-size: .85rem; }
.geo-langs a[aria-current] { color: var(--brand); font-weight: 600; }
.geo-fallback {
  background: #fff7ed;
  border: 1px solid #fdba74;
  color: #9a3412;
  border-radius: 10px;
  padding: .75rem 1rem;
  margin-bottom: 1rem;
}
.geo-vote { margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--ink-200); }
.geo-vote button {
  border: 1px solid var(--ink-200);
  background: #fff;
  border-radius: 8px;
  padding: .35rem .8rem;
  margin-right: .4rem;
  cursor: pointer;
}
.geo-vote-thanks { color: #166534; }
.geo-avail { margin-top: 1.2rem; color: var(--ink-500); }
.geo-avail a { margin-left: .5rem; }
.geo-more { display: inline-block; margin-top: .6rem; font-size: .9rem; }
@media (max-width: 960px) {
  .geo-article-layout { grid-template-columns: 1fr; }
  .geo-side, .geo-toc { position: static; }
}