:root {
  --ink: #151719;
  --muted: #5c6267;
  --line: #d7dbd8;
  --paper: #f7f7f3;
  --accent: #e74c2c;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); }
body { margin: 0; font-family: "IBM Plex Sans TC", system-ui, sans-serif; font-size: 16px; line-height: 1.65; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--accent); }
.site-header, main, footer { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.site-header { min-height: 84px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--ink); gap: 24px; }
.wordmark { font-weight: 700; letter-spacing: .1em; text-decoration: none; }
nav { display: flex; gap: 22px; font-size: .9rem; }
nav a { text-decoration: none; }
main { padding: 62px 0 84px; }
.hero { display: grid; grid-template-columns: 1fr 2fr; gap: 24px; padding-bottom: 72px; border-bottom: 1px solid var(--ink); }
.eyebrow { margin: 0; color: var(--accent); font-size: .75rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
h1, h2 { line-height: 1.18; letter-spacing: -.04em; }
h1 { margin: 10px 0 20px; font-size: clamp(2.5rem, 7vw, 5.8rem); max-width: 13ch; }
h2 { margin: 8px 0; font-size: clamp(1.4rem, 3vw, 2.25rem); }
.hero > p:last-child { align-self: end; max-width: 34ch; color: var(--muted); }
.feed, .archive { padding-top: 58px; }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; border-bottom: 1px solid var(--line); padding-bottom: 12px; }
.section-heading h2 { margin: 0; font-size: 1.15rem; letter-spacing: 0; }
.article-card { display: grid; grid-template-columns: 180px 1fr minmax(110px, 150px); gap: 24px; padding: 30px 0; border-bottom: 1px solid var(--line); align-items: start; }
.article-card h2 { margin-top: 0; }
.article-card p:not(.eyebrow) { margin: 0; color: var(--muted); max-width: 45ch; }
.read-more { font-weight: 600; text-decoration: none; white-space: nowrap; }
.reading { width: min(100%, 720px); margin-inline: auto; }
.reading h1 { max-width: 12ch; }
.lede { color: var(--muted); font-size: 1.18rem; max-width: 50ch; }
.prose { margin-top: 44px; font-size: 1.06rem; }
.prose h2 { margin-top: 44px; font-size: 1.5rem; letter-spacing: -.02em; }
.prose p, .prose ul { max-width: 60ch; }
.sources { margin-top: 50px; padding-top: 22px; border-top: 1px solid var(--line); font-size: .9rem; overflow-wrap: anywhere; }
.sources h2 { font-size: 1rem; letter-spacing: 0; }
.back { margin-top: 48px; font-weight: 600; }
.archive > h1 { font-size: clamp(2.6rem, 6vw, 4.7rem); }
.archive-list { margin: 44px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--ink); }
.archive-list li { display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 18px 0; }
.archive-list a { font-size: 1.2rem; font-weight: 600; }
.archive-list span { color: var(--muted); }
footer { display: flex; justify-content: space-between; gap: 24px; padding: 28px 0 42px; border-top: 1px solid var(--ink); color: var(--muted); font-size: .8rem; }
footer span:first-child { color: var(--ink); font-weight: 700; letter-spacing: .1em; }

@media (max-width: 720px) {
  .site-header { min-height: 68px; }
  nav { gap: 13px; font-size: .8rem; }
  .hero, .article-card { grid-template-columns: 1fr; }
  .hero { gap: 8px; padding-bottom: 48px; }
  .article-card { gap: 8px; padding: 24px 0; }
  .article-card .read-more { margin-top: 6px; }
  main { padding-top: 42px; }
  footer { flex-direction: column; gap: 4px; }
}