:root {
  --geo-paper: #f5f7f4;
  --geo-ink: #152925;
  --geo-muted: #526962;
  --geo-green: #15735c;
  --geo-line: #d5e2dc;
  --geo-dark: #102a27;
}
.geo-page { margin: 0; background: var(--geo-paper); color: var(--geo-ink); font: 16px/1.75 Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; }
.geo-page *, .geo-page *::before, .geo-page *::after { box-sizing: border-box; }
.geo-page main a, .geo-header:not(.site-nav-host) a { color: var(--geo-green); text-underline-offset: .23em; }
.geo-page :is(a, button, summary, [tabindex]):focus-visible { outline: 2px solid #228c71; outline-offset: 4px; }
.geo-page :is(section,article)[id] { scroll-margin-top: 128px; }
.geo-header:not(.site-nav-host) { padding: 12px 24px; display: flex; justify-content: space-between; }
.geo-shell, .geo-hero-inner { width: min(1200px, calc(100% - 72px)); margin-inline: auto; }
.geo-hero { background: radial-gradient(ellipse at 83% 22%, #205044 0, transparent 57%), var(--geo-dark); color: #f5fff9; }
.geo-hero-inner { text-align: center; padding-block: clamp(54px, 8vw, 112px); }
.geo-brand { color: #7ddeb8; font-size: 13px; font-weight: 700; margin: 0 0 17px; }
.geo-hero h1 { font-size: clamp(43px, 5.9vw, 88px); letter-spacing: -.06em; line-height: 1.1; margin: 0; font-weight: 770; text-wrap: balance; }
.geo-hero h1 span { display: block; color: #9be4c6; }
.geo-promise { max-width: 36em; margin: 25px auto 10px; color: #e4f2eb; font-size: clamp(17px, 1.65vw, 22px); }
.geo-hero-note { margin: 0; color: #acc9bc; }
.geo-page .geo-primary { display: inline-flex; align-items: center; min-height: 46px; border-radius: 9px; padding: 8px 17px; text-decoration: none; background: var(--geo-green); color: #fff; font-weight: 700; }
.geo-entry, .geo-training { margin-block: clamp(40px, 7vw, 80px); }
.geo-entry > h2, .geo-training h2, .geo-chapter h2 { font-size: clamp(26px, 3.3vw, 45px); line-height: 1.2; letter-spacing: -.03em; margin: 0 0 13px; }
.geo-entry > p { margin: 0 0 22px; max-width: 54em; color: var(--geo-muted); }
.geo-reader-links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 11px; }
.geo-reader-links a { display: grid; gap: 3px; padding: 16px; border-radius: 10px; text-decoration: none; border: 1px solid var(--geo-line); background: #fff; }
.geo-reader-links a:hover { border-color: #82ac9d; background: #eff8f2; }
.geo-reader-links span { color: var(--geo-muted); font-size: 13px; }
#geo-expand { font: inherit; cursor: pointer; border-radius: 8px; min-height: 42px; background: white; color: var(--geo-green); border: 1px solid var(--geo-line); padding: 6px 11px; }
.geo-reading { display: grid; grid-template-columns: 195px minmax(0, 1fr); align-items: start; gap: clamp(25px, 6vw, 76px); }
.geo-toc { position: sticky; top: 105px; padding: 0 12px 0 0; border-right: 1px solid var(--geo-line); }
.geo-toc h2 { font-size: 14px; margin: 0 0 7px; }
.geo-toc a { display: block; padding: 8px 10px; font-size: 14px; text-decoration: none; border-radius: 6px; color: var(--geo-muted); }
.geo-toc a[aria-current="location"], .geo-toc a:hover { background: #e4efe7; color: var(--geo-green); }
.geo-document { min-width: 0; }
.geo-chapter { margin-block: 31px 58px; }
.geo-chapter > header { margin-bottom: 20px; }
.geo-chapter > header p { color: var(--geo-green); margin: 0 0 6px; font-size: 13px; font-weight: 700; }
.geo-lesson { border-top: 1px solid var(--geo-line); padding: 18px 0 21px; }
.geo-lesson h3 { font-size: clamp(19px, 2.1vw, 25px); margin: 0 0 10px; line-height: 1.4; }
.geo-lesson > p { margin: 0 0 12px; }
.geo-lesson ul { padding-left: 1.4em; }
.geo-explain { background: #eaf2ec; padding: 9px 14px; border-radius: 8px; margin-top: 14px; }
.geo-explain summary { cursor: pointer; color: #225b4a; font-size: 14px; font-weight: 650; }
.geo-explain p { margin: 10px 0 5px; }
.geo-lesson .geo-source { margin: 10px 0 0; color: var(--geo-muted); font-size: 13px; }
.geo-table { max-width: 100%; overflow: auto; border: 1px solid var(--geo-line); border-radius: 9px; background: #fff; }
.geo-table table { border-collapse: collapse; width: 100%; min-width: 420px; font-size: 14px; }
.geo-table :is(th,td) { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--geo-line); }
.geo-table th { background: #e5f0e8; color: #244e41; }
.geo-table tr:last-child td { border-bottom: 0; }
.geo-training { display: grid; grid-template-columns: minmax(0, 1fr) minmax(180px, 245px); align-items: center; gap: 27px; border-radius: 17px; padding: clamp(20px, 5vw, 53px); background: var(--geo-dark); color: #f5fff9; }
.geo-training p:not(.geo-brand), .geo-training figcaption { color: #c7ddd1; }
.geo-training figure { margin: 0; text-align: center; font-size: 13px; }
.geo-training img { display: block; margin: 0 auto 9px; border-radius: 8px; background: white; padding: 4px; }
.geo-training .geo-primary { background: #adedd3; color: #16322a; }
@media (max-width: 900px) {
  .geo-shell, .geo-hero-inner { width: calc(100% - 40px); }
  .geo-reader-links { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .geo-reading { grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .geo-toc { position: static; display: flex; flex-wrap: wrap; align-items: center; border-right: 0; border-bottom: 1px solid var(--geo-line); padding-bottom: 12px; }
  .geo-toc h2 { width: 100%; }
}
@media (max-width: 640px) {
  .geo-shell, .geo-hero-inner { width: calc(100% - 32px); }
  .geo-training { grid-template-columns: minmax(0, 1fr); }
  .geo-hero h1 { font-size: clamp(34px, 9.3vw, 56px); }
  .geo-reader-links a { padding: 11px; }
  .geo-training figure { justify-self: start; }
  .geo-table table { min-width: 390px; }
}
@media (prefers-reduced-motion: reduce) {
  .geo-page *, .geo-page *::before { animation: none !important; }
}