/* AI Pulse 报告页：正文 16px、单栏阅读宽度、分类色仅做标记。 */
:root {
  color-scheme: light;
  --bg: #f7f6f2;
  --surface: #ffffff;
  --ink: #1d1f1b;
  --ink-2: #44483f;
  --muted: #6a6e64;
  --line: #e3e2db;
  --accent: #3f6a3a;
  --digest: #f1f4ec;
  --digest-line: #d9e2cf;
  --c-news: #2f62b3;
  --c-open: #3f7a36;
  --c-research: #7a4fb0;
  --c-international: #0f7a80;
  --c-china-politics: #b5462f;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #141613;
  --surface: #1c1f1b;
  --ink: #eceee8;
  --ink-2: #c7cbc1;
  --muted: #9aa094;
  --line: #2f342d;
  --accent: #a9cf96;
  --digest: #1d2419;
  --digest-line: #2f3b29;
  --c-news: #8fb4f0;
  --c-open: #9fd28f;
  --c-research: #c3a5ef;
  --c-international: #7fd0d4;
  --c-china-politics: #f0a08d;
}
* { box-sizing: border-box; }
/* 锚点偏移只加在跳转目标上；放在 html 的 scroll-padding 会让顶栏里获得焦点的控件触发页面回滚 */
.category, #main { scroll-margin-top: 116px; }
body { margin: 0; background: var(--bg); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; left: 16px; top: -60px; z-index: 20; padding: 10px 16px; background: var(--ink); color: var(--bg); border-radius: 6px; }
.skip-link:focus { top: 12px; }

/* 分类色：每个分类只换一个变量 */
[data-cat="news"] { --cat: var(--c-news); }
[data-cat="open"] { --cat: var(--c-open); }
[data-cat="research"] { --cat: var(--c-research); }
[data-cat="international"] { --cat: var(--c-international); }
[data-cat="china-politics"] { --cat: var(--c-china-politics); }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--cat, var(--accent)); flex: none; }

/* 顶栏：品牌 + 栏目切换 + 分类跳转/搜索。用 fixed 而不是 sticky：Chrome 会把 sticky 顶栏里
   获得焦点的下拉框/搜索框按其文档原位“滚动到可见”，导致页面上跳。高度 = 56 + 48 + 1 边框。 */
body { padding-top: 105px; }
.masthead { position: fixed; top: 0; left: 0; right: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.masthead-inner, .toolbar { max-width: 880px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 20px; }
.masthead-inner { height: 56px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 17px; letter-spacing: -.02em; }
:root[data-theme="dark"] .brand img { filter: brightness(1.9); }
.page-tabs { display: flex; gap: 4px; margin-left: auto; background: var(--line); padding: 3px; border-radius: 999px; }
.page-tabs a { padding: 4px 14px; border-radius: 999px; font-size: 14px; color: var(--muted); }
.page-tabs a[aria-current="page"] { background: var(--surface); color: var(--ink); font-weight: 600; box-shadow: 0 1px 2px #0000001a; }
.theme-control select { border: 1px solid var(--line); background: var(--surface); border-radius: 8px; padding: 4px 6px; font-size: 13px; color: var(--muted); }
.toolbar { height: 48px; justify-content: space-between; }
.jump { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; min-width: 0; }
.jump::-webkit-scrollbar { display: none; }
.jump a { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; font-size: 14px; white-space: nowrap; background: var(--surface); }
.jump a span { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.jump a:hover, .jump a.is-active { border-color: var(--cat); }
.search { display: flex; align-items: center; gap: 6px; color: var(--muted); border: 1px solid var(--line); background: var(--surface); border-radius: 999px; padding: 0 12px; flex: 0 1 200px; min-width: 120px; }
.search svg { flex: none; }
.search input { border: 0; background: transparent; outline: none; width: 100%; padding: 5px 0; font-size: 14px; color: var(--ink); }

.page { max-width: 880px; margin: 0 auto; padding: 0 24px; }

/* 封面：日期、标题、30 秒速览 */
.cover { padding: 44px 0 12px; }
.kicker { margin: 0; font-size: 12px; letter-spacing: .14em; color: var(--accent); font-weight: 600; }
.cover h1 { margin: 10px 0 6px; font-family: var(--serif); font-size: clamp(32px, 6vw, 44px); line-height: 1.2; letter-spacing: -.01em; }
.lede { margin: 0; font-size: 17px; color: var(--ink-2); }
.facts { margin: 10px 0 0; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.tldr { margin-top: 28px; padding: 20px 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.tldr h2 { margin: 0 0 8px; font-size: 14px; letter-spacing: .06em; color: var(--muted); font-weight: 600; }
.tldr-paragraph { margin: 0; font-size: 17px; line-height: 1.95; color: var(--ink); text-align: justify; }
.tldr-paragraph sup { font-size: 11px; line-height: 0; margin: 0 2px 0 1px; }
.tldr-paragraph sup a { color: var(--accent); font-weight: 600; }
.tldr-notes { list-style: none; margin: 14px 0 0; padding: 12px 0 0; border-top: 1px solid var(--line); display: grid; gap: 6px; font-size: 12.5px; }
.tldr-notes li { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 6px; color: var(--muted); }
.tldr-notes .note-no { min-width: 16px; font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.tldr-notes .tag { margin-right: 0; vertical-align: 0; }
.tldr-notes:target, .tldr-notes li:target { background: color-mix(in srgb, var(--accent) 10%, transparent); border-radius: 6px; }
.tldr-credit { margin: 10px 0 0; font-size: 12px; color: var(--muted); }
.tag { display: inline-block; margin-right: 8px; padding: 0 7px; border-radius: 4px; font-size: 12px; line-height: 20px; vertical-align: 2px; color: var(--cat); background: color-mix(in srgb, var(--cat) 12%, transparent); font-weight: 600; }

/* 分类：标题 → 编辑综述 → 报道列表 */
.category { padding-top: 40px; }
.category-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; border-bottom: 2px solid var(--ink); padding-bottom: 8px; }
.category-head h2 { display: flex; align-items: center; gap: 10px; margin: 0; font-family: var(--serif); font-size: 26px; line-height: 1.3; }
.category-head h2 .dot { width: 10px; height: 10px; }
.category-head p { margin: 0; color: var(--muted); font-size: 13px; }

.digest { margin: 18px 0 8px; padding: 18px 22px 14px; background: var(--digest); border: 1px solid var(--digest-line); border-left: 4px solid var(--cat); border-radius: 4px 12px 12px 4px; }
.digest-label { margin: 0 0 6px; font-size: 13px; font-weight: 600; color: var(--cat); letter-spacing: .08em; }
.digest-points { margin: 0; padding-left: 20px; }
.digest-points li { padding: 6px 0; }
.digest-points li::marker { color: var(--cat); font-weight: 700; }
.digest-points p { margin: 0; }
.digest-points > li > p:first-child { font-size: 16px; line-height: 1.8; color: var(--ink); }
.cites { display: flex; flex-wrap: wrap; gap: 4px 6px; margin-top: 6px !important; font-size: 12.5px; line-height: 1.6; }
.cite { display: inline-flex; flex-wrap: wrap; align-items: baseline; gap: 2px 6px; padding: 1px 8px; border-radius: 6px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); }
.cite b { font-weight: 600; color: var(--ink-2); }
.cite a { color: var(--muted); text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: 3px; }
.cite > a:only-child { text-decoration: none; color: var(--ink-2); }
.cite a:hover { color: var(--cat); text-decoration-color: currentColor; }
.digest-credit { margin: 10px 0 0; font-size: 12px; color: var(--muted); }
.digest-missing { margin: 16px 0; padding: 12px 16px; border: 1px dashed var(--line); border-radius: 10px; color: var(--muted); font-size: 14px; }

.stories { list-style: none; margin: 0; padding: 0; }
.story { padding: 18px 0; border-bottom: 1px solid var(--line); }
.story-meta { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 12px; margin: 0 0 4px; font-size: 13px; color: var(--muted); }
.story-meta .publisher { color: var(--ink-2); font-weight: 600; }
.top-mark { padding: 0 6px; border-radius: 4px; font-size: 12px; font-weight: 600; color: var(--cat); background: color-mix(in srgb, var(--cat) 12%, transparent); }
.story-meta time { margin-left: auto; font-variant-numeric: tabular-nums; white-space: nowrap; }
.story-title { display: block; font-size: 18px; line-height: 1.5; font-weight: 600; letter-spacing: -.005em; overflow-wrap: anywhere; }
.story-title:hover { color: var(--cat); }
.story-title::after { content: " ↗"; color: var(--muted); font-weight: 400; font-size: 14px; }
.story-zh { margin: 2px 0 0; font-size: 14.5px; line-height: 1.6; color: var(--ink-2); }
.story-excerpt { margin: 6px 0 0; font-size: 15px; line-height: 1.75; color: var(--ink-2); display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 3; overflow: hidden; overflow-wrap: anywhere; white-space: pre-line; }
.stories--research .story-title { font-size: 17px; }
.stories--research .story-excerpt { -webkit-line-clamp: 2; }
.related { margin-top: 8px; font-size: 14px; }
.related summary { cursor: pointer; color: var(--cat); width: fit-content; }
.related ul { margin: 8px 0 0; padding-left: 14px; border-left: 2px solid var(--line); list-style: none; }
.related li { padding: 4px 0; }
.related li span { color: var(--muted); font-size: 13px; }

/* 开源：仓库卡片 + 今日 star 指标 */
.stories--open .story { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: start; }
.repo-owner { color: var(--muted); font-weight: 400; }
.stories--open .story-title { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 16px; }
.stories--open .story-meta { margin: 6px 0 0; }
.repo-trend { margin: 0; text-align: right; line-height: 1.3; }
.repo-trend strong { display: block; color: var(--cat); font-size: 18px; font-variant-numeric: tabular-nums; }
.repo-trend span { font-size: 12px; color: var(--muted); }

.is-extra { display: none; }
.category.is-expanded .is-extra, .is-searching .is-extra { display: block; }
.category.is-expanded .stories--open .is-extra, .is-searching .stories--open .is-extra { display: grid; }
.more { display: block; width: 100%; margin-top: 12px; padding: 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); color: var(--ink-2); font-size: 14px; cursor: pointer; }
.more:hover { border-color: var(--cat); color: var(--cat); }
.is-searching .more, .is-searching .digest, .is-searching .cover .tldr { display: none; }
.no-match { color: var(--muted); font-size: 14px; padding: 12px 0; }
.is-searching .category.is-empty { display: none; }

.colophon { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 56px; padding: 24px 0 48px; border-top: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.colophon p { margin: 0; max-width: 600px; }

@media (max-width: 640px) {
  body { padding-top: 101px; }
  .category, #main { scroll-margin-top: 108px; }
  .masthead-inner, .toolbar, .page { padding: 0 16px; }
  .masthead-inner { height: 52px; gap: 10px; }
  .brand { font-size: 16px; }
  .page-tabs a { padding: 3px 10px; font-size: 13px; }
  .theme-control { display: none; }
  .toolbar { gap: 8px; }
  .search { flex: 0 0 38px; min-width: 38px; padding: 0 11px; transition: flex-basis .2s; }
  .search:focus-within { flex-basis: 60%; }
  .cover { padding-top: 28px; }
  .tldr { padding: 14px 16px; margin-left: -4px; margin-right: -4px; }
  .digest { padding: 14px 16px 12px; margin-left: -4px; margin-right: -4px; }
  .category-head h2 { font-size: 22px; }
  .story-title { font-size: 17px; }
  .story-meta time { margin-left: 0; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media print {
  .masthead, .more, .colophon a { display: none; }
  .is-extra { display: block !important; }
  .story { break-inside: avoid; }
}

/* 往期菜单 */
.archive-menu { position: relative; flex: none; }
.archive-menu > summary { width: 36px; height: 36px; display: grid; place-items: center; cursor: pointer; list-style: none; border-radius: 8px; color: var(--ink); }
.archive-menu > summary::-webkit-details-marker { display: none; }
.archive-menu > summary:hover, .archive-menu[open] > summary { background: var(--line); }
.archive-panel { position: absolute; top: 44px; left: 0; z-index: 20; width: min(270px, calc(100vw - 32px)); padding: 14px; background: var(--surface); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 12px 32px #0000001f; }
.archive-panel h2 { margin: 0 0 8px; font-size: 14px; }
.archive-panel a { display: flex; align-items: center; min-height: 40px; padding: 0 8px; border-radius: 6px; font-size: 14px; }
.archive-panel a:hover, .archive-panel a[aria-current] { background: var(--digest); color: var(--accent); }
.archive-dates { max-height: min(360px, 50vh); overflow-y: auto; color: var(--muted); font-size: 13px; }
.archive-latest { border-bottom: 1px solid var(--line); }
.archive-all { border-top: 1px solid var(--line); color: var(--accent); }

/* 往期列表页（无固定顶栏） */
body:has(.archive-page) { padding-top: 0; }
.archive-page { padding-top: 40px; padding-bottom: 48px; }
.archive-page h1 { font-family: var(--serif); font-size: 34px; margin: 24px 0 6px; }
.archive-editions { list-style: none; padding: 0; margin: 28px 0; }
.archive-editions li { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; padding: 14px 0; border-bottom: 1px solid var(--line); }
.archive-editions time { margin-right: auto; font-variant-numeric: tabular-nums; }
.archive-editions a, .archive-page > a:last-child { color: var(--accent); }

.empty-state { padding: 64px 0; text-align: center; color: var(--muted); }
.empty-state h2 { color: var(--ink); font-size: 20px; font-weight: 600; }