:root {
  color-scheme: light;
  --ink: #17212B;
  --text: #25313D;
  --muted: #4A5968;
  --line: #D7E6EB;
  --accent: #1F7A8C;
  --paper: #F7FBFC;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button, a, input, select { outline-offset: 5px; }
button { cursor: pointer; }
.site-header { max-width: 1280px; margin: auto; padding: 22px 32px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 700; letter-spacing: -.4px; }
.brand-mark { display: grid; place-items: center; width: 30px; height: 30px; background: var(--ink); border-radius: 7px; color: white; font-size: 21px; }
.brand-caption { font-size: 12px; font-weight: 500; color: var(--muted); margin-left: 14px; letter-spacing: 1px; }
.home-link { font-size: 13px; color: var(--muted); }
main { max-width: 1280px; padding: 0 32px; margin: auto; }
.hero { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; padding: 35px 0 32px; }
.eyebrow { font-size: 10px; letter-spacing: 2px; font-weight: 700; color: var(--accent); }
h1 { font-size: 38px; letter-spacing: -1.2px; line-height: 1.25; margin: 13px 0 12px; color: var(--ink); font-weight: 700; }
.hero-description { font-size: 14px; color: var(--muted); line-height: 1.8; margin: 0; }
.stats { display: flex; gap: 22px; font-size: 12px; align-items: baseline; color: var(--muted); padding-bottom: 4px; }
.stats strong { font-size: 23px; margin-right: 4px; color: var(--ink); font-weight: 600; }
.stats span:last-child { display: none; }
.browse-header { display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid var(--line); padding-top: 24px; }
.browse h2 { font-size: 23px; margin: 0; letter-spacing: -.5px; color: var(--ink); }
.search { display: flex; align-items: center; background: white; border: 1px solid #BFD1D9; border-radius: 8px; padding: 0 15px; gap: 8px; width: 350px; }
.search > span { font-size: 28px; line-height: 1; color: var(--accent); }
input { border: 0; min-width: 0; flex: 1; font-size: 13px; background: transparent; padding: 13px 0; color: var(--ink); }
input:focus { outline: 0; }
.search:focus-within { outline: 2px solid var(--accent); outline-offset: 3px; }
.categories { display: flex; flex-wrap: wrap; gap: 8px; margin: 21px 0 18px; }
.categories button { font-size: 12px; border: 1px solid var(--line); border-radius: 6px; padding: 9px 12px; background: white; color: var(--muted); transition: background .15s, border-color .15s; }
.categories button:hover { border-color: #98BEC7; }
.categories button[aria-pressed=true] { color: white; background: var(--ink); border-color: var(--ink); }
.categories .count { margin-left: 7px; font-size: 11px; opacity: .8; }
.filters { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; font-size: 12px; color: var(--muted); padding-bottom: 18px; }
.filters label { display: flex; align-items: center; gap: 8px; }
.filters select { max-width: 240px; padding: 6px 8px; border: 1px solid var(--line); color: var(--ink); background: white; border-radius: 5px; font-size: 12px; }
.filters button { background: transparent; border: 0; color: var(--accent); padding: 7px 0; }
.filters p { margin: 0 0 0 auto; }
.article-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.article { display: flex; flex-direction: column; min-width: 0; background: white; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; transition: box-shadow .18s ease, border-color .18s ease; }
.article:hover { border-color: #AFCDD6; box-shadow: 0 9px 25px rgba(26, 65, 82, .07); }
.article-cover { display: block; aspect-ratio: 30 / 19; background: #F7FBFC; border-bottom: 1px solid #E4EDF0; overflow: hidden; }
.article-cover img { display: block; width: 100%; height: 100%; object-fit: contain; }
.article-cover:focus-visible { outline: 3px solid var(--accent); outline-offset: -4px; }
.article-body { display: flex; flex-direction: column; flex: 1; padding: 19px 20px 17px; }
.article-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 11px; line-height: 1.6; color: var(--muted); }
.topic { color: var(--accent); font-weight: 600; }
.series-label { padding-left: 8px; border-left: 1px solid var(--line); }
.article-meta .author { color: #6A7682; }
.article h3 { margin: 11px 0 10px; font-size: 18px; line-height: 1.6; font-weight: 600; letter-spacing: -.2px; color: var(--ink); }
.article h3 a:hover { color: var(--accent); }
.article-summary { font-size: 13px; line-height: 1.8; color: var(--muted); margin: 0 0 20px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.image-attribution { font-size: 10px; line-height: 1.6; color: #6A7682; margin: -7px 0 12px; }
.article-bottom { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 12px; border-top: 1px solid #EEF3F5; font-size: 11px; }
.tags { display: flex; gap: 7px; color: #6A7682; min-width: 0; flex: 1; overflow: hidden; white-space: nowrap; }
.tags span { overflow: hidden; text-overflow: ellipsis; }
.tags span + span { display: none; }
.read-link { color: var(--accent); font-weight: 600; white-space: nowrap; padding: 5px 0; }
.missing-link { color: #6A7682; white-space: nowrap; }
.pagination { display: flex; gap: 24px; justify-content: center; align-items: center; margin: 32px 0 45px; font-size: 12px; color: var(--muted); }
.pagination button { border: 1px solid var(--line); border-radius: 6px; background: white; padding: 10px 16px; color: var(--ink); }
button:disabled { opacity: .4; cursor: default; }
.empty { padding: 40px 0; color: var(--muted); grid-column: 1/-1; }
.collection-links { display: flex; gap: 15px; flex-wrap: wrap; max-width: 1216px; margin: 0 auto; padding: 22px 0; border-top: 1px solid var(--line); font-size: 12px; line-height: 1.8; color: var(--accent); }
.collection-links span { color: var(--muted); }
footer { border-top: 1px solid var(--line); max-width: 1216px; margin: auto; padding: 25px 0 35px; color: var(--muted); font-size: 12px; }
footer strong { font-size: 18px; color: var(--ink); }
footer p { display: inline; margin-left: 15px; }
footer > span { float: right; font-size: 11px; line-height: 24px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
@media (max-width: 1280px) { footer, .collection-links { margin-left: 32px; margin-right: 32px; } }
@media (max-width: 1050px) { .article-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } .stats { gap: 14px; } }
@media (max-width: 700px) {
  .brand-caption { display: none; }
  .hero { align-items: flex-start; flex-direction: column; gap: 16px; padding: 28px 0 22px; }
  h1 { font-size: 33px; margin: 11px 0 9px; }
  .stats { font-size: 11px; padding: 0; }
  .stats strong { font-size: 20px; }
  .browse-header { flex-direction: column; align-items: stretch; gap: 15px; padding-top: 21px; }
  .browse h2 { font-size: 21px; }
  .search { width: 100%; }
  .filters { gap: 12px; font-size: 11px; }
  .filters select { font-size: 11px; max-width: 220px; }
  footer > span { float: none; display: block; margin-top: 14px; }
}
@media (max-width: 620px) {
  main { padding: 0 20px; }
  .site-header { padding: 18px 20px; }
  .brand { font-size: 20px; }
  .home-link { font-size: 11px; }
  .hero-description { font-size: 13px; }
  .categories { margin: 18px 0 16px; gap: 7px; }
  .categories button { font-size: 11px; padding: 8px 9px; }
  .article-list { grid-template-columns: 1fr; gap: 22px; }
  .article-body { padding: 18px 19px 15px; }
  .article h3 { font-size: 18px; }
  .article-summary { -webkit-line-clamp: 2; }
  .filters p { margin-left: auto; }
  footer, .collection-links { margin-left: 20px; margin-right: 20px; }
  footer p { display: block; margin: 10px 0; }
  .pagination { gap: 20px; }
}
@media (prefers-reduced-motion: reduce) { .article, .categories button { transition: none; } }