:root {
  --ink: hsl(321 28% 16%);
  --muted: hsl(321 12% 38%);
  --paper: hsl(321 44% 98%);
  --panel: #fff;
  --line: hsl(321 28% 88%);
  --brand: hsl(321 67% 40%);
  --accent: hsl(7 72% 44%);
  --radius: 15px;
  --space: 1.50rem;
}
* { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; }
body {
  margin: 0; color: var(--ink); background: var(--paper);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI",
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); text-underline-offset: .2em; }
img { display: block; max-width: 100%; height: auto; }
.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: #fff; padding: .6rem; z-index: 5; }
.site-header, main, .site-footer {
  width: min(1120px, calc(100% - 2rem)); margin-inline: auto;
}
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 1.2rem 0; border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; text-decoration: none; font-size: 1.15rem; }
.brand small { display: block; color: var(--muted); font-weight: 500; font-size: .72rem; }
.primary-nav { display: flex; gap: .8rem; flex-wrap: wrap; justify-content: flex-end; }
.primary-nav a { font-size: .9rem; text-decoration: none; }
.breadcrumbs { display: flex; gap: .5rem; padding-top: 1.2rem; color: var(--muted); }
.page-hero { padding: clamp(2rem, 7vw, 5.5rem) 0 2rem; max-width: 860px; }
.eyebrow { color: var(--accent); font-weight: 800; letter-spacing: .08em; }
h1 { font-size: clamp(2rem, 6vw, 4.6rem); line-height: 1.08; margin: .4rem 0 1rem; }
h2 { font-size: clamp(1.3rem, 3vw, 2rem); line-height: 1.25; }
.direct-answer { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); }
.page-date { color: var(--muted); font-size: .9rem; }
.topic-cover { border-radius: var(--radius); border: 1px solid var(--line); }
.article-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: calc(var(--space) * 1.5); margin: 2rem 0;
}
.content-section {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: clamp(1.1rem, 3vw, 2rem);
}
.content-section li + li { margin-top: .55rem; }
.contextual-note { border-left: 3px solid var(--accent); padding-left: .9rem; }
.context-link { font-weight: 700; margin-inline: .25rem; }
.next-reading { padding: 2rem 0 4rem; }
.next-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.next-link {
  display: grid; gap: .35rem; padding: 1rem; background: var(--panel);
  border: 1px solid var(--line); border-radius: var(--radius); text-decoration: none;
}
.next-link span { font-weight: 800; }
.next-link small { color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); padding: 2rem 0 3rem; color: var(--muted); }
.site-footer nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.not-found { min-height: 72vh; display: grid; place-content: center; max-width: 42rem; }
@media (max-width: 760px) {
  .site-header { align-items: flex-start; }
  .primary-nav { max-height: 7.8rem; overflow: auto; }
  .article-grid, .next-grid { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .site-header { display: block; }
  .primary-nav { margin-top: .8rem; justify-content: flex-start; }
  h1 { overflow-wrap: anywhere; }
}