/* AI 资讯时间线 · 样式（生成器产出，勿手改：generator/build.py） */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #171a28;
  --sub: #5b6472;
  --faint: #98a2b3;
  --line: #e5e8ee;
  --accent: #2e5ce6;
  --accent-soft: #e9efff;
  --accent-line: #ccdcff;
  --danger: #d92d20;
  --ok: #067647;
  --ok-bg: #e6f4ea;
  --warn: #b42318;
  --warn-bg: #fee4e2;
  --heat-a: #f79009;
  --heat-b: #f04438;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
a { color: var(--accent); }
.container { max-width: 720px; margin: 0 auto; padding: 0 14px; }

/* 页头 */
header.site { padding: 18px 0 10px; display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.site h1 { font-size: 20px; margin: 0; letter-spacing: .2px; }
.site .tagline { color: var(--sub); font-size: 13px; margin: 3px 0 0; }
.site nav a { font-size: 14px; text-decoration: none; color: var(--sub); white-space: nowrap; }
.site nav a:hover { color: var(--accent); }

/* 顶部摘要条 */
.summary {
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 14px;
  margin: 4px 0 10px;
}
.summary b { color: var(--accent); }

/* 工具条（吸顶） */
.toolbar {
  position: sticky; top: 0; z-index: 20;
  background: rgba(246, 247, 249, .96);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}
.tb-inner { display: flex; flex-direction: column; gap: 7px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; background: var(--card); width: max-content; }
.seg-btn {
  appearance: none; border: 0; background: none; cursor: pointer;
  padding: 5px 14px; font-size: 13.5px; color: var(--sub); font-weight: 600;
}
.seg-btn + .seg-btn { border-left: 1px solid var(--line); }
.seg-btn[aria-pressed="true"] { background: var(--accent); color: #fff; }
.seg-btn .n { font-weight: 400; opacity: .75; font-size: 12px; margin-left: 2px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  appearance: none; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--sub);
  border-radius: 999px; padding: 3px 11px; font-size: 13px;
}
.chip[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.chip.zero { opacity: .45; }
.chip .n { font-size: 11.5px; opacity: .7; margin-left: 2px; }

/* 日期分组 */
.day-h { margin: 18px 0 9px; font-size: 13px; color: var(--sub); font-weight: 600; display: flex; align-items: baseline; gap: 8px; }
.day-h .today { color: var(--accent); }
.cards { list-style: none; margin: 0; padding: 0; }

/* 卡片 */
.card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 10px;
}
.card.is-selected::before {
  content: ""; position: absolute; left: -1px; top: 12px; bottom: 12px;
  width: 3px; border-radius: 2px; background: var(--accent);
}
.meta-row { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }
.meta-row .ct { font: 12px/1 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--faint); margin-right: 2px; }
.cat { font-size: 11px; font-weight: 700; padding: 1px 7px; border-radius: 5px; }
.cat-模型 { color: #5b3df5; background: #eeeaff; }
.cat-产品 { color: #07756d; background: #dff5f1; }
.cat-研究 { color: #9a5b0c; background: #fdf0dc; }
.cat-行业 { color: #44546b; background: #eaedf3; }
.star { color: #f79009; font-size: 13px; }
.badge { font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 5px; }
.badge.pending { color: var(--warn); background: var(--warn-bg); }
.badge.beat { color: var(--ok); background: var(--ok-bg); }
.ctitle { margin: 0; font-size: 16.5px; line-height: 1.45; font-weight: 650; }
.ctitle a { color: inherit; text-decoration: none; }
.ctitle a:hover, .ctitle a:focus { color: var(--accent); text-decoration: underline; }
.ctitle-src a { color: var(--ink); font-weight: 500; }
.ctitle-src .badge.srconly { color: var(--sub); background: #eaedf3; margin-right: 2px; font-weight: 600; }
.oneliner { margin: 6px 0 0; color: var(--sub); font-size: 14px; }
.facts { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 12px; margin-top: 9px; font-size: 12px; color: var(--sub); }
.src .tier { font-weight: 700; font-size: 11px; padding: 0 4px; border-radius: 4px; margin-left: 3px; }
.tier.t1 { color: var(--ok); background: var(--ok-bg); }
.tier.t15 { color: #9a5b0c; background: #fdf0dc; }
.tier.t2 { color: #44546b; background: #eaedf3; }
.heat { display: inline-flex; align-items: center; gap: 5px; }
.heatbar { display: inline-block; width: 54px; height: 4px; background: #e7eaf0; border-radius: 2px; overflow: hidden; }
.heatbar i { display: block; height: 100%; background: linear-gradient(90deg, var(--heat-a), var(--heat-b)); }
.toggle {
  appearance: none; background: none; border: 0; padding: 0; margin-top: 9px;
  font-size: 12.5px; color: var(--accent); cursor: pointer; font-weight: 600;
}
.toggle:hover { text-decoration: underline; }
.detail { display: none; margin-top: 9px; border-top: 1px dashed var(--line); padding-top: 9px; }
.card.open .detail { display: block; }
.quote {
  margin: 0 0 8px; padding-left: 10px; border-left: 3px solid var(--line);
  font-size: 13px; color: var(--sub); white-space: pre-wrap; overflow-wrap: anywhere;
}
.cluster h4 { margin: 0 0 4px; font-size: 12px; color: var(--sub); font-weight: 600; }
.cluster ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 3px; }
.cluster a { font-size: 12.5px; overflow-wrap: anywhere; }
.tiny { font-size: 11.5px; color: var(--faint); margin: 8px 0 0; }

/* D7 goal 第四刀：今日热点（多源簇排行，clusters 多源数据；无数据隐藏） */
.hotbox {
  background: #fff8ec;
  border: 1px solid #f6dca0;
  border-radius: 10px;
  padding: 10px 12px 12px;
  margin: 10px 0;
}
.hotbox h2 {
  font-size: 14px; margin: 0 0 6px; letter-spacing: .2px;
  display: flex; align-items: center; gap: 6px;
}
.hotbox h2 .badge { background: var(--heat-a); color: #fff; padding: 1px 7px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.hotbox ol { margin: 0; padding-left: 22px; }
.hotbox li { font-size: 13.5px; line-height: 1.55; padding: 2px 0; }
.hotbox li .n { display: inline-block; min-width: 26px; color: var(--heat-b); font-weight: 700; }
.hotbox li a { color: var(--ink); text-decoration: none; }
.hotbox li a:hover { color: var(--accent); text-decoration: underline; }
.hotbox li .meta { color: var(--sub); font-size: 11.5px; margin-left: 4px; }

/* 空态与页脚 */
.empty-state {
  border: 1px dashed var(--line); border-radius: 12px; background: var(--card);
  text-align: center; color: var(--sub); padding: 34px 16px; margin: 16px 0; font-size: 14px;
}
.empty-state .big { font-size: 16px; font-weight: 650; color: var(--ink); margin-bottom: 6px; }
footer { padding: 26px 0 44px; text-align: center; font-size: 12.5px; color: var(--sub); }
footer .upd { display: inline-block; }
footer .upd.stale { color: var(--danger); font-weight: 700; }
footer .links { margin-top: 6px; color: var(--faint); }
footer a { color: var(--sub); }
.noscript-box { border: 1px solid var(--warn-bg); background: var(--warn-bg); color: var(--warn); border-radius: 10px; padding: 12px 14px; margin: 12px 0; font-size: 14px; }

/* 文章页（about / 404） */
.prose { max-width: 720px; margin: 0 auto; padding: 6px 14px 30px; }
.prose h2 { font-size: 17px; margin: 26px 0 8px; }
.prose p, .prose li { color: var(--sub); font-size: 14.5px; }
.prose strong { color: var(--ink); }
.prose ul { padding-left: 20px; margin: 8px 0; }
.prose code { background: var(--accent-soft); border-radius: 4px; padding: 0 5px; font-size: 13px; }
.center-404 { text-align: center; padding: 64px 14px; }
.center-404 .code { font-size: 54px; font-weight: 800; color: var(--accent); letter-spacing: 2px; }

/* 桌面 = 加宽版 */
@media (min-width: 640px) {
  .site h1 { font-size: 22px; }
  .ctitle { font-size: 17.5px; }
  .card { padding: 14px 16px; }
  .tb-inner { flex-direction: row; justify-content: space-between; align-items: center; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}