:root {
  color-scheme: light;
  --paper: #fbfaf7;
  --surface: #fff;
  --ink: #26332f;
  --muted: #68736e;
  --line: #e6e9e5;
  --accent: #167f5b;
  --accent-soft: #e9f4ec;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.78 "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  overflow-wrap: break-word;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 2px; }

.site-header { background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); }
.header-inner {
  max-width: 880px;
  min-height: 64px;
  margin: auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; letter-spacing: -.02em; text-decoration: none; white-space: nowrap; }
.brand-mark { display: block; width: 30px; height: 30px; border-radius: 50%; }
.header-nav { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; font-size: .86rem; font-weight: 600; }
.header-nav a { text-decoration: none; white-space: nowrap; }
.header-nav a:hover { text-decoration: underline; }
.page-main { max-width: 880px; margin: auto; padding: 36px 24px 80px; }
.document {
  padding: clamp(24px, 5vw, 52px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 12px 44px rgba(23, 48, 37, .035);
}
.document > :first-child { margin-top: 0; }
.document h1, .document h2, .home-intro h1 { font-family: "Iowan Old Style", "Songti SC", Georgia, serif; letter-spacing: -.025em; line-height: 1.3; }
.document h1 { margin: 0 0 24px; font-size: clamp(1.75rem, 5vw, 2.4rem); }
.document h2 { margin: 2.1em 0 .7em; font-size: 1.26rem; scroll-margin-top: 24px; }
.document p { margin: 0 0 1.05em; }
.document strong { color: #1b2924; }
.document blockquote {
  margin: 0 0 28px;
  padding: 15px 18px;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: var(--accent-soft);
  color: #355346;
  font-size: .91rem;
}
.document blockquote p { margin: 0; }
.document ul, .document ol { padding-left: 1.5em; }
.document li { margin: .35em 0; }
.site-footer { max-width: 880px; margin: 0 auto; padding: 0 24px 32px; color: var(--muted); font-size: .8rem; }
.site-footer a { color: inherit; }
.home-intro { padding: 34px 0 28px; }
.eyebrow { color: var(--accent); font-size: .7rem; font-weight: 800; letter-spacing: .16em; }
.home-intro h1 { margin: 16px 0 20px; font-size: clamp(2rem, 6vw, 3.25rem); }
.home-intro h1 span { display: block; color: var(--muted); font-size: .58em; font-weight: 400; }
.home-intro p { color: var(--muted); }
.document-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.document-link { display: flex; justify-content: space-between; align-items: center; min-height: 92px; padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; color: var(--ink); text-decoration: none; font-weight: 700; }
.document-link:hover { border-color: var(--accent); }
.link-arrow { color: var(--accent); font-size: 1.4rem; font-weight: 400; }
@media (max-width: 600px) {
  body { font-size: 15px; }
  .header-inner { min-height: 56px; padding: 10px 18px; }
  .header-nav { gap: 12px; }
  .page-main { padding: 20px 14px 56px; }
  .document { padding: 22px 18px; border-radius: 12px; }
  .document-grid { grid-template-columns: 1fr; }
  .document-link { min-height: 76px; }
}