:root {
  color-scheme: light;
  --page: #f4f6f5;
  --paper: #ffffff;
  --text: #24312d;
  --muted: #59665f;
  --accent: #25604f;
  --line: #d9e2dd;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body { margin: 0; background: var(--page); color: var(--text); font: 1rem/1.9 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; overflow-wrap: anywhere; }
main { max-width: 52rem; margin: 2rem auto; padding: clamp(1.25rem, 5vw, 3.5rem); background: var(--paper); border: 1px solid var(--line); border-radius: 1rem; }
.brand { margin: 0 0 .6rem; color: var(--accent); font-weight: 650; letter-spacing: .08em; }
h1 { margin: 0; font-size: clamp(2rem, 6vw, 2.65rem); line-height: 1.35; letter-spacing: -.02em; }
h2 { margin: 0 0 .75rem; font-size: 1.25rem; line-height: 1.6; }
p { margin: .75rem 0; }
.date { margin: .75rem 0 1.75rem; color: var(--muted); font-size: .94rem; }
a { color: var(--accent); text-decoration-thickness: .07em; text-underline-offset: .2em; }
a:hover { text-decoration-thickness: .12em; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; border-radius: 2px; }
.skip-link { position: absolute; top: .5rem; left: .5rem; padding: .5rem 1rem; background: var(--paper); transform: translateY(-200%); z-index: 1; }
.skip-link:focus { transform: none; }
.notice { margin: 2rem 0; padding: 1.25rem 1.5rem; background: #edf4f0; border-left: 3px solid var(--accent); border-radius: 0 .6rem .6rem 0; }
ul, ol { margin: 0; padding-left: 1.4rem; }
li + li { margin-top: .5rem; }
nav { padding-bottom: 1.8rem; border-bottom: 1px solid var(--line); }
nav ol { columns: 2; column-gap: 2.5rem; }
nav li { break-inside: avoid; }
nav a { display: inline-block; padding: .15rem 0; }
section { margin-top: 2.25rem; }
strong { font-weight: 650; }
footer { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between; border-top: 1px solid var(--line); margin-top: 2.5rem; padding-top: 1.25rem; color: var(--muted); font-size: .9rem; }
@media (max-width: 40rem) {
  main { margin: 0; border: 0; border-radius: 0; }
  nav ol { columns: 1; }
  .notice { padding: 1rem 1.1rem; }
}
@media print {
  body { background: white; }
  main { max-width: none; margin: 0; padding: 0; border: 0; }
  nav, .skip-link, footer a { display: none; }
  h2 { break-after: avoid; }
  p, li { orphans: 3; widows: 3; }
  a { color: inherit; }
}