:root {
  font-family:
    system-ui,
    -apple-system,
    "Noto Sans TC",
    sans-serif;
  color: #203b30;
  background: #fafbf7;
  line-height: 1.85;
  font-synthesis: none;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
a {
  color: #17684d;
  text-underline-offset: 0.25em;
}
a:hover {
  text-decoration-thickness: 2px;
}
a:focus-visible {
  outline: 3px solid #17684d;
  outline-offset: 5px;
}
header,
footer {
  max-width: 1120px;
  margin: auto;
  padding: 28px 24px;
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid #d8e1d8;
}
header nav {
  display: flex;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  text-decoration: none;
}
main {
  max-width: 800px;
  margin: 64px auto 88px;
  padding: 0 24px;
}
h1 {
  font-size: clamp(2rem, 4.8vw, 3.25rem);
  line-height: 1.3;
  letter-spacing: -0.035em;
  margin: 16px 0 24px;
}
h2 {
  font-size: 1.5rem;
  line-height: 1.45;
  margin: 44px 0 14px;
}
h3 {
  font-size: 1.13rem;
  margin: 28px 0 8px;
}
p {
  margin: 0 0 20px;
}
section {
  scroll-margin-top: 24px;
}
.eyebrow,
.meta,
.note {
  font-size: 0.9rem;
  color: #53675b;
}
.eyebrow {
  margin-top: 32px;
  font-weight: 650;
}
.intro {
  font-size: 1.2rem;
  line-height: 1.95;
}
.toc {
  border-block: 1px solid #d8e1d8;
  padding: 24px 0;
  margin: 32px 0;
}
.toc ol {
  margin-bottom: 0;
}
.article-list {
  list-style: none;
  padding: 0;
  counter-reset: articles;
}
.article-list li {
  counter-increment: articles;
  padding: 32px 0;
  border-top: 1px solid #d8e1d8;
}
.article-list li:before {
  content: "0" counter(articles);
  display: block;
  font-size: 0.85rem;
  color: #53675b;
}
.article-list a {
  font-size: 1.5rem;
  font-weight: 650;
  line-height: 1.5;
}
.article-list p {
  margin: 12px 0 0;
}
.related {
  border-top: 1px solid #d8e1d8;
  margin-top: 48px;
}
.related li {
  margin-bottom: 24px;
}
.related p {
  font-size: 0.95rem;
}
.cta {
  display: inline-block;
  padding: 12px 22px;
  background: #17684d;
  color: white;
  text-decoration: none;
  border-radius: 6px;
}
footer {
  border-top: 1px solid #d8e1d8;
  font-size: 0.9rem;
}
.skip {
  position: absolute;
  left: 16px;
  top: -100px;
  background: white;
  padding: 8px;
}
.skip:focus {
  top: 8px;
}
@media (max-width: 540px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    padding: 20px;
  }
  header nav {
    font-size: 0.95rem;
  }
  main {
    margin-top: 36px;
    padding: 0 20px;
  }
  .intro {
    font-size: 1.08rem;
  }
}