:root {
  color-scheme: light;
  font-family: system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #26382f;
  background: #f4f5ee;
}
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.7; }
a { color: #255f49; text-underline-offset: .18em; }
a:focus-visible { outline: 2px solid #255f49; outline-offset: 3px; }
.page-header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px max(16px, calc((100vw - 920px) / 2));
  background: #e7eee3;
  border-bottom: 1px solid #c9d6c8;
}
.page-header nav, .contents { display: flex; flex-wrap: wrap; gap: 12px 18px; }
main { max-width: 952px; padding: 18px 16px 48px; margin: auto; }
article { background: #fffefa; padding: clamp(16px, 4vw, 44px); border: 1px solid #d6dfd2; border-radius: 12px; }
article#en { display: none; }
body:has(#en:target, #en :target) article#en { display: block; }
body:has(#en:target, #en :target) article#zh { display: none; }
.intro { padding-bottom: 20px; }
.kicker { color: #4c6758; font-size: .9rem; font-weight: 650; }
h1 { font-size: clamp(1.8rem, 4.5vw, 2.7rem); line-height: 1.25; margin: .3em 0; }
h2 { font-size: clamp(1.2rem, 3vw, 1.5rem); line-height: 1.4; margin: 0 0 .7em; }
h3 { font-size: 1rem; }
p { margin: .65em 0; }
section { padding: 26px 0; border-top: 1px solid #d6dfd2; scroll-margin-top: 16px; }
section:last-child { padding-bottom: 0; }
ul { padding-inline-start: 1.25em; }
li + li { margin-top: .55em; }
.contents { padding-top: 12px; }
.table-scroll { overflow-x: auto; margin: 14px 0; }
table { border-collapse: collapse; width: 100%; font-size: .92rem; font-variant-numeric: tabular-nums; }
caption { text-align: left; font-weight: 650; margin-bottom: 5px; }
th, td { border: 1px solid #d6dfd2; padding: .48em .65em; text-align: left; vertical-align: top; }
thead { background: #e7eee3; }
aside { background: #edf3e9; border-left: 3px solid #538267; margin: 14px 0; padding: 10px 14px; }
var { font-weight: 650; }
@media print {
  :root, article { background: #fff; }
  main, article { max-width: none; margin: 0; padding: 0; border: 0; }
  .page-header, .contents { display: none; }
  h2, h3 { break-after: avoid; }
  aside, tr { break-inside: avoid; }
}