/* Field Notes 站点样式（首页 + 文章页 + 分享清单）。由 reader/site/ 维护，构建时复制到 public/assets/。 */
:root {
  --paper: #f5f2ea;
  --paper-2: #ece8dd;
  --paper-3: #e3ded1;
  --ink: #1c1b18;
  --ink-2: #57534b;
  --ink-3: #8c877c;
  --line: rgba(28, 27, 24, .11);
  --line-2: rgba(28, 27, 24, .22);
  --accent: #c2412a;
  --accent-soft: rgba(194, 65, 42, .14);
  --heat-fill: rgba(194, 65, 42, .16);
  --mark: rgba(232, 178, 60, .38);
  --serif: "Iowan Old Style", "Charter", "Source Serif Pro", Georgia, "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", system-ui, sans-serif;
  --mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, monospace;
  --bar-h: 52px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #171612; --paper-2: #201e19; --paper-3: #2a2822;
    --ink: #ebe7dd; --ink-2: #b2ac9f; --ink-3: #7d786d;
    --line: rgba(235, 231, 221, .1); --line-2: rgba(235, 231, 221, .2);
    --accent: #e8735a; --accent-soft: rgba(232, 115, 90, .16); --heat-fill: rgba(232, 115, 90, .2);
    --mark: rgba(232, 178, 60, .3);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #171612; --paper-2: #201e19; --paper-3: #2a2822;
  --ink: #ebe7dd; --ink-2: #b2ac9f; --ink-3: #7d786d;
  --line: rgba(235, 231, 221, .1); --line-2: rgba(235, 231, 221, .2);
  --accent: #e8735a; --accent-soft: rgba(232, 115, 90, .16); --heat-fill: rgba(232, 115, 90, .2);
  --mark: rgba(232, 178, 60, .3);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 13px/1.5 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
mark { background: var(--mark); color: inherit; border-radius: 2px; padding: 0 1px; }
img { display: block; }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 40;
  height: var(--bar-h);
  display: flex; align-items: center; gap: 24px;
  padding: 0 24px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.wordmark { display: flex; align-items: baseline; gap: 10px; white-space: nowrap; }
.wordmark b { font: 600 13px/1 var(--serif); letter-spacing: .18em; }
.wordmark span { font-size: 11px; color: var(--ink-3); letter-spacing: .04em; }
.topbar-nav { display: flex; gap: 18px; font-size: 12px; color: var(--ink-2); }
.topbar-nav a:hover, .topbar-nav a[aria-current] { color: var(--ink); }
.topbar-nav a[aria-current] { box-shadow: inset 0 -1px var(--ink); }
.topbar-end { margin-left: auto; display: flex; align-items: center; gap: 16px; color: var(--ink-3); font-size: 12px; white-space: nowrap; }

.icon-btn {
  width: 28px; height: 28px; display: inline-grid; place-items: center;
  border: 1px solid var(--line); border-radius: 6px; color: var(--ink-2);
}
.icon-btn:hover { border-color: var(--line-2); color: var(--ink); }
.icon-btn svg { width: 14px; height: 14px; }

.tag { font-size: 11px; color: var(--ink-3); white-space: nowrap; }
.tag + .tag::before { content: "·"; margin: 0 5px; color: var(--line-2); }

.kbd {
  font: 10px/1 var(--mono); color: var(--ink-3);
  border: 1px solid var(--line-2); border-radius: 4px; padding: 2px 4px;
}

/* 热度 / 章节节奏小图 */
.spark { display: block; overflow: visible; }
.spark .area { fill: var(--heat-fill); }
.spark .line { fill: none; stroke: var(--accent); stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.spark .base { stroke: var(--line); stroke-width: 1; vector-effect: non-scaling-stroke; }
.spark .dur { fill: var(--ink-3); opacity: .7; }
.spark .range { fill: var(--accent-soft); }
.spark .tick { stroke: var(--ink-3); stroke-width: 1; vector-effect: non-scaling-stroke; }

.text-link { color: var(--ink); box-shadow: inset 0 -1px var(--line-2); }
.text-link:hover { color: var(--accent); box-shadow: inset 0 -1px var(--accent); }

/* ================= 首页 / 分享清单 ================= */
  /* ---------- 顶栏搜索 ---------- */
  .search {
    flex: 0 1 440px; min-width: 0; display: flex; align-items: center; gap: 8px;
    height: 32px; padding: 0 10px;
    border: 1px solid var(--line-2); border-radius: 7px; background: var(--paper);
  }
  .search:focus-within { border-color: var(--ink-2); }
  .search svg { width: 14px; height: 14px; color: var(--ink-3); flex: none; }
  .search input { flex: 1; min-width: 0; border: 0; outline: 0; background: none; font: 13px var(--sans); color: var(--ink); }
  .search input::placeholder { color: var(--ink-3); }

  /* ---------- 布局 ---------- */
  .desk {
    max-width: 1520px; margin: 0 auto;
    display: grid; grid-template-columns: 224px minmax(0, 1fr); grid-template-rows: auto 1fr;
  }
  .filterbar { grid-column: 2; grid-row: 1; }
  .facets { grid-column: 1; grid-row: 1 / span 2; }
  .stage { grid-column: 2; grid-row: 2; padding: 0 28px 80px; min-width: 0; }

  /* ---------- 左侧索引 ---------- */
  .facets {
    position: sticky; top: var(--bar-h); align-self: start;
    max-height: calc(100vh - var(--bar-h)); overflow-y: auto; overscroll-behavior: contain;
    padding: 18px 18px 48px 24px; border-right: 1px solid var(--line);
    scrollbar-width: thin;
  }
  .facet + .facet { margin-top: 22px; }
  .facet h3 {
    margin: 0 0 6px; display: flex; justify-content: space-between; align-items: baseline;
    font: 600 11px/1 var(--sans); letter-spacing: .12em; color: var(--ink-3);
  }
  .facet h3 button { font-weight: 400; letter-spacing: 0; color: var(--accent); font-size: 11px; }
  .facet-item {
    width: 100%; display: flex; align-items: baseline; gap: 8px;
    padding: 3px 0; text-align: left; font-size: 12.5px; color: var(--ink-2);
  }
  .facet-item .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .facet-item .n { font: 11px var(--mono); color: var(--ink-3); }
  .facet-item:hover { color: var(--ink); }
  .facet-item[aria-pressed="true"] { color: var(--ink); font-weight: 600; }
  .facet-item[aria-pressed="true"] .name::before {
    content: ""; display: inline-block; width: 6px; height: 6px; margin: 0 6px 1px 0;
    background: var(--accent); border-radius: 1px;
  }
  .facet-item.zero { opacity: .38; }
  .facet-more { margin-top: 4px; font-size: 11.5px; color: var(--ink-3); }
  .facet-more:hover { color: var(--ink); }
  .dur-scale { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; margin-top: 4px; }
  .dur-scale .facet-item {
    flex-direction: column; align-items: stretch; gap: 3px; padding: 6px 6px 5px;
    border: 1px solid var(--line); border-radius: 5px; font-size: 11.5px; text-align: center;
  }
  .dur-scale .facet-item[aria-pressed="true"] { border-color: var(--ink); }
  .dur-scale .facet-item[aria-pressed="true"] .name::before { display: none; }
  .dur-bar { height: 18px; display: flex; align-items: flex-end; justify-content: center; }
  .dur-bar i { display: block; width: 100%; background: var(--paper-3); border-radius: 1px; }
  .dur-scale .facet-item[aria-pressed="true"] .dur-bar i { background: var(--accent); }

  /* ---------- 筛选条 ---------- */
  .filterbar {
    position: sticky; top: var(--bar-h); z-index: 20;
    display: flex; align-items: center; gap: 10px; min-height: 44px;
    padding: 0 28px; background: var(--paper); border-bottom: 1px solid var(--line);
  }
  .filters-toggle { display: none; font-size: 12px; padding: 4px 10px; border: 1px solid var(--line-2); border-radius: 6px; }
  .chips { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; flex: 1; min-width: 0; }
  .chip {
    display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 8px;
    font-size: 12px; border-radius: 5px; background: var(--paper-2); color: var(--ink);
  }
  .chip small { color: var(--ink-3); font-size: 10.5px; }
  .chip span[aria-hidden] { color: var(--ink-3); }
  .chip:hover span[aria-hidden] { color: var(--accent); }
  .bar-title { font: 600 14px/1 var(--serif); }
  .bar-title small { margin-left: 8px; font: 11.5px var(--sans); color: var(--ink-3); }
  .chip-clear { font-size: 12px; color: var(--ink-3); }
  .chip-clear:hover { color: var(--accent); }
  .result-count { font-size: 12px; color: var(--ink-3); white-space: nowrap; }
  .result-count b { font: 600 12px var(--mono); color: var(--ink); }
  .sort { display: flex; gap: 2px; padding: 2px; border-radius: 7px; background: var(--paper-2); }
  .sort button { height: 24px; padding: 0 9px; border-radius: 5px; font-size: 12px; color: var(--ink-2); white-space: nowrap; }
  .sort button[aria-pressed="true"] { background: var(--paper); color: var(--ink); box-shadow: 0 0 0 1px var(--line); }

  /* ---------- 最近整理 ---------- */
  .recent { padding: 16px 0 14px; border-bottom: 1px solid var(--line-2); }
  .recent[hidden] { display: none; }
  .section-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; }
  .section-head h2 { margin: 0; font: 600 11px/1 var(--sans); letter-spacing: .12em; color: var(--ink-3); }
  .section-head span { font-size: 11.5px; color: var(--ink-3); }
  .hot-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(240px, 300px); gap: 36px; }
  .hot-grid.with-picks { grid-template-columns: minmax(200px, 250px) minmax(0, 1fr) minmax(220px, 280px); gap: 32px; }
  .with-picks .hot-list { grid-template-columns: minmax(0, 1fr); }
  .with-picks .hot-list li:nth-child(n+4) { display: none; }
  .picks { padding-right: 32px; margin-right: -32px; border-right: 1px solid var(--line); }
  .pick { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 4px 12px; align-items: start; }
  .pick + .pick { margin-top: 10px; }
  .pick .thumb { grid-row: span 2; }
  .pick b { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; font: 500 14px/1.45 var(--serif); }
  .pick small { font-size: 11.5px; color: var(--ink-3); }
  .pick:hover b { color: var(--accent); }
  .hot-list { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 28px; }
  .hot-list a { display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 12px; align-items: center; padding: 3px 0; }
  .hot-text b { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 500 14px/1.45 var(--serif); }
  .hot-text small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11.5px; color: var(--ink-3); }
  .hot-text small .mono { color: var(--accent); font-size: 10.5px; }
  .hot-list a:hover b { color: var(--accent); }
  .qod { margin: 0; padding-left: 20px; border-left: 1px solid var(--line); }
  .qod blockquote { margin: 0; font: 15px/1.7 var(--serif); color: var(--ink); }
  .qod figcaption { margin-top: 6px; font-size: 11.5px; color: var(--ink-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .thumb {
    width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 3px;
    background: var(--paper-3); filter: saturate(.8);
  }

  /* ---------- 列表 ---------- */
  .group-head {
    position: sticky; top: calc(var(--bar-h) + 44px); z-index: 10;
    display: flex; align-items: baseline; gap: 12px;
    padding: 18px 0 7px; background: var(--paper); border-bottom: 1px solid var(--ink);
  }
  .group-head h3 { margin: 0; font: 600 14px/1 var(--serif); letter-spacing: .02em; }
  .group-head span { font: 11px var(--mono); color: var(--ink-3); }
  .row {
    display: grid;
    grid-template-columns: 44px 72px minmax(0, 1fr) 112px 148px 54px;
    column-gap: 16px; align-items: center;
    padding: 9px 8px; margin: 0 -8px;
    border-bottom: 1px solid var(--line); border-radius: 4px; cursor: pointer;
  }
  .row:hover { background: var(--paper-2); }
  .row:focus-visible { outline-offset: -2px; }
  .row.open { background: var(--paper-2); border-bottom-color: transparent; margin-bottom: 6px; cursor: default; }
  .row-date { font: 11px var(--mono); color: var(--ink-3); }
  .row-main { min-width: 0; }
  .row-title {
    display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    font: 500 15.5px/1.45 var(--serif); color: var(--ink);
  }
  .row-meta { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin-top: 1px; font-size: 12px; color: var(--ink-3); }
  .row-meta .ch { color: var(--ink-2); }
  .row-snip { display: block; margin-top: 4px; font-size: 12px; color: var(--ink-2); line-height: 1.6; }
  .row-snip .k { font-family: var(--mono); color: var(--accent); margin-right: 4px; }
  .row-topics { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
  .row-dur { font: 12px var(--mono); color: var(--ink-2); text-align: right; }
  .row.open .row-title { white-space: normal; }

  /* 原位展开 */
  .detail {
    grid-column: 3 / -1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
    gap: 28px; padding: 14px 0 6px; cursor: auto;
  }
  .detail-summary { margin: 0; font: 14px/1.85 var(--serif); color: var(--ink-2); }
  .detail-summary .auto { font: 11px var(--sans); color: var(--ink-3); }
  .hot-badge { margin-left: 6px; font: normal 10px/1 var(--sans); color: var(--accent); border: 1px solid currentColor; border-radius: 3px; padding: 1px 3px; vertical-align: 1px; }
  .quotes { margin: 14px 0 0; padding: 0; list-style: none; }
  .quotes li { padding: 2px 0 2px 12px; border-left: 2px solid var(--accent); font: 14px/1.7 var(--serif); color: var(--ink); }
  .quotes li + li { margin-top: 10px; }
  .quotes small { display: block; font: 11px var(--sans); color: var(--ink-3); }
  .quotes small a:hover { color: var(--accent); }
  .detail-tax { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
  .detail-tax button { font-size: 11.5px; padding: 2px 7px; border: 1px solid var(--line-2); border-radius: 4px; color: var(--ink-2); }
  .detail-tax button:hover { border-color: var(--ink-2); color: var(--ink); }
  .detail-tax button small { color: var(--ink-3); margin-right: 4px; }

  .timeline { position: relative; }
  .timeline-svg { width: 100%; height: 52px; display: block; overflow: visible; }
  .timeline-svg .seg { fill: transparent; }
  .timeline-svg .seg.hot { fill: var(--accent-soft); }
  .timeline-svg .bound { stroke: var(--line-2); stroke-width: 1; vector-effect: non-scaling-stroke; }
  .timeline-svg .floor { stroke: var(--ink-3); stroke-width: 1; vector-effect: non-scaling-stroke; }
  .timeline-axis { display: flex; justify-content: space-between; margin-top: 4px; font: 10.5px var(--mono); color: var(--ink-3); }
  .timeline-label { position: absolute; top: -2px; left: 0; font-size: 10.5px; color: var(--ink-3); letter-spacing: .06em; }
  .chapters { margin: 10px 0 0; padding: 0; list-style: none; columns: 2; column-gap: 22px; }
  .chapters li { break-inside: avoid; }
  .chapters a {
    display: flex; gap: 8px; padding: 2px 4px; margin: 0 -4px; border-radius: 3px;
    font-size: 12.5px; line-height: 1.55; color: var(--ink-2);
  }
  .chapters a span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .chapters a .mono { font-size: 11px; color: var(--ink-3); padding-top: 1px; min-width: 42px; }
  .chapters .cont { color: var(--ink-3); }
  .chapters a.hot, .chapters a:hover { background: var(--accent-soft); color: var(--ink); }
  .chapters-more { margin-top: 4px; font-size: 12px; color: var(--ink-3); }
  .chapters-more:hover { color: var(--ink); }
  .detail-actions { grid-column: 1 / -1; display: flex; gap: 20px; align-items: center; padding-top: 12px; border-top: 1px solid var(--line); font-size: 12.5px; }
  .read-btn { flex: none; white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 14px; border-radius: 6px; background: var(--ink); color: var(--paper); font-weight: 500; }
  .read-btn:hover { background: var(--accent); }
  .detail-actions .hint { margin-left: auto; color: var(--ink-3); font-size: 11.5px; }

  .empty { padding: 60px 0; text-align: center; color: var(--ink-3); }
  .empty button { color: var(--accent); }

  /* ---------- 中等宽度 ---------- */
  @media (max-width: 1180px) {
    .row { grid-template-columns: 44px 72px minmax(0, 1fr) 112px 54px; }
    .row-topics { display: none; }
    .hot-list { grid-template-columns: 1fr; }
    .hot-grid.with-picks { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
    .hot-grid.with-picks .qod { grid-column: 1 / -1; padding: 12px 0 0; border-left: 0; border-top: 1px solid var(--line); }
    .topbar-stats { display: none; }
  }
  @media (max-width: 960px) {
    .desk { grid-template-columns: 1fr; grid-template-rows: auto; }
    .filterbar, .facets, .stage { grid-column: 1; grid-row: auto; }
    .filterbar { padding: 0 16px; flex-wrap: wrap; gap: 8px; padding-block: 8px; }
    .filters-toggle { display: inline-block; }
    .facets {
      display: none; position: static; max-height: none; overflow: visible;
      border-right: 0; border-bottom: 1px solid var(--line-2);
      padding: 14px 16px 18px; background: var(--paper-2);
      grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 24px;
    }
    .desk.facets-open .facets { display: grid; }
    .facet + .facet { margin-top: 0; }
    .stage { padding: 0 16px 64px; }
    .group-head { position: static; }
    .topbar { padding: 0 16px; gap: 14px; }
    .topbar-nav { display: none; }
    .search { flex: 1; }
    .sort { order: 3; }
    .result-count { order: 2; margin-left: auto; }
    .chips { order: 4; flex-basis: 100%; }
    .chips:empty { display: none; }
  }
  @media (max-width: 760px) {
    .wordmark span { display: none; }
    .hot-grid, .hot-grid.with-picks { grid-template-columns: minmax(0, 1fr); gap: 14px; }
    .picks { border-right: 0; padding-right: 0; margin-right: 0; }
    .bar-title { display: none; }
    .chips:has(.bar-title:only-child) { display: none; }
    .filterbar { gap: 8px 10px; }
    .qod { padding: 12px 0 0; border-left: 0; border-top: 1px solid var(--line); }
    .hot-list li:nth-child(n+3) { display: none; }
    .row { grid-template-columns: 64px minmax(0, 1fr) 46px; column-gap: 12px; }
    .row-date, .row-spark, .row-topics { display: none; }
    .row-title { white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; font-size: 15px; }
    .detail { grid-column: 1 / -1; grid-template-columns: 1fr; gap: 16px; }
    .chapters { columns: 1; }
    .detail-actions .hint, .detail-actions .tag { display: none; }
    .facets { grid-template-columns: 1fr; }
  }

/* ================= 文章页 ================= */
  :root { --size: 17px; --measure: 660px; --gutter: 112px; }
  .page-article .topbar { position: static; }
  .crumb { font-size: 12px; color: var(--ink-3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
  .crumb a { color: var(--ink-2); }
  .crumb a:hover { color: var(--accent); }

  .wrap { max-width: 1380px; margin: 0 auto; padding: 0 28px; }

  /* ---------- 页头 ---------- */
  .head { display: grid; grid-template-columns: minmax(0, 1fr) 232px; gap: 40px; padding: 26px 0 20px; }
  .kicker { display: flex; flex-wrap: wrap; gap: 0 14px; font-size: 12px; color: var(--ink-3); }
  .kicker b { color: var(--accent); font-weight: 600; }
  .kicker .mono { font-size: 11.5px; }
  .page-article h1 { margin: 8px 0 6px; font: 600 32px/1.28 var(--serif); letter-spacing: -.01em; text-wrap: balance; }
  .byline { font-size: 13px; color: var(--ink-2); }
  .byline span + span::before { content: "·"; margin: 0 8px; color: var(--ink-3); }
  .byline em { font-style: normal; color: var(--ink-3); margin-right: 4px; font-size: 12px; }
  .summary { position: relative; margin: 12px 0 0; max-width: 820px; font: 14.5px/1.8 var(--serif); color: var(--ink-2); }
  .summary.clamp { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .summary-toggle { font-size: 12px; color: var(--accent); margin-top: 2px; }
  .tax { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
  .tax a { font-size: 11.5px; padding: 1px 7px; border: 1px solid var(--line-2); border-radius: 4px; color: var(--ink-2); }
  .tax a small { color: var(--ink-3); margin-right: 4px; }
  .tax a:hover { border-color: var(--ink-2); color: var(--ink); }
  .head-aside { display: flex; flex-direction: column; gap: 10px; padding-top: 4px; }
  .head-aside img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 4px; filter: saturate(.85); background: var(--paper-3); }
  .head-aside .links { display: flex; justify-content: space-between; font-size: 12px; }
  .peak { font-size: 12px; color: var(--ink-3); line-height: 1.55; }
  .peak a { display: block; color: var(--ink); font: 500 13px/1.5 var(--serif); }
  .peak a:hover { color: var(--accent); }
  .peak .mono { color: var(--accent); font-size: 11px; margin-right: 6px; }

  /* ---------- 时间轴带 ---------- */
  .band { position: sticky; top: 0; z-index: 30; background: var(--paper); border-block: 1px solid var(--line-2); }
  .band-row { display: flex; align-items: stretch; gap: 14px; }
  .band-btn { display: none; align-self: center; flex: none; height: 26px; padding: 0 9px; border: 1px solid var(--line-2); border-radius: 6px; font-size: 12px; color: var(--ink-2); }
  .band-btn[aria-expanded="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
  .band-mark { display: none; align-self: center; align-items: center; flex: none; min-height: 32px; padding: 0 6px; font: 600 11px/1 var(--serif); letter-spacing: .16em; white-space: nowrap; }
  .track { position: relative; flex: 1; min-width: 0; height: 58px; cursor: pointer; transition: height .18s ease; }
  .track svg { position: absolute; left: 0; right: 0; top: 8px; width: 100%; height: 32px; overflow: visible; transition: top .18s, height .18s; }
  .track .area { fill: var(--paper-3); }
  .track .line { fill: none; stroke: var(--ink-3); stroke-width: 1; vector-effect: non-scaling-stroke; }
  .track .read .area { fill: var(--heat-fill); }
  .track .read .line { stroke: var(--accent); stroke-width: 1.3; }
  .track .bars rect { fill: var(--paper-3); }
  .track .read .bars rect { fill: var(--heat-fill); }
  .track .bound { stroke: var(--line-2); stroke-width: 1; vector-effect: non-scaling-stroke; }
  .track .floor { stroke: var(--ink-3); stroke-width: 1; vector-effect: non-scaling-stroke; }
  .track .hover { fill: var(--accent-soft); }
  .cursor { position: absolute; top: 4px; height: 40px; width: 0; border-left: 1.5px solid var(--ink); pointer-events: none; transition: top .18s, height .18s; }
  .cursor::before { content: ""; position: absolute; top: -3px; left: -4.5px; border: 4px solid transparent; border-top-color: var(--ink); }
  .ticks { position: absolute; left: 0; right: 0; bottom: 3px; height: 12px; pointer-events: none; transition: opacity .15s; }
  .ticks span { position: absolute; transform: translateX(-50%); font: 10px/1 var(--mono); color: var(--ink-3); white-space: nowrap; }
  .ticks span:first-child { transform: none; }
  .ticks span:last-child { transform: translateX(-100%); }
  .band-legend { display: block; margin-top: 3px; font: 10.5px/1.2 var(--sans); color: var(--ink-3); }
  .tip {
    position: absolute; top: 100%; margin-top: 6px; z-index: 5; pointer-events: none;
    max-width: 340px; padding: 6px 9px; border-radius: 6px;
    background: var(--ink); color: var(--paper); font-size: 12px; line-height: 1.45;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; opacity: 0; transition: opacity .1s;
  }
  .tip.on { opacity: 1; }
  .tip .mono { opacity: .7; margin-right: 6px; font-size: 11px; }
  .band-meta { align-self: center; flex: none; font: 11px var(--mono); color: var(--ink-3); white-space: nowrap; min-width: 120px; text-align: right; }
  .band-meta b { color: var(--ink); font-weight: 600; }

  .band.compact .track { height: 30px; }
  .band.compact .track svg { top: 4px; height: 22px; }
  .band.compact .cursor { top: 1px; height: 28px; }
  .band.compact .ticks, .band.compact .band-legend { opacity: 0; }
  .band.compact .band-mark { display: flex; }

  .band-panel { border-top: 1px solid var(--line); padding: 10px 0 12px; }
  .band-panel[hidden] { display: none; }
  .band-panel .toc { max-height: 60vh; }

  /* ---------- 主体三栏 ---------- */
  .body { display: grid; grid-template-columns: 248px minmax(0, 1fr) 208px; gap: 40px; padding-top: 28px; }
  .rail { position: sticky; top: 46px; align-self: start; max-height: calc(100vh - 56px); display: flex; flex-direction: column; }
  .rail-head { display: flex; justify-content: space-between; align-items: center; padding-bottom: 8px; border-bottom: 1px solid var(--ink); }
  .rail-head h2 { margin: 0; font: 600 11px/1 var(--sans); letter-spacing: .12em; color: var(--ink-3); }
  .rail-head h2 .mono { letter-spacing: 0; margin-left: 4px; }
  .switch { display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; color: var(--ink-3); }
  .switch i { width: 24px; height: 14px; border-radius: 7px; background: var(--paper-3); position: relative; transition: background .15s; }
  .switch i::after { content: ""; position: absolute; top: 2px; left: 2px; width: 10px; height: 10px; border-radius: 50%; background: var(--paper); box-shadow: 0 0 0 .5px var(--line-2); transition: transform .15s; }
  .switch[aria-pressed="true"] { color: var(--ink); }
  .switch[aria-pressed="true"] i { background: var(--accent); }
  .switch[aria-pressed="true"] i::after { transform: translateX(10px); }
  .toc { margin: 0; padding: 6px 0 24px; list-style: none; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin; }
  .toc a {
    display: grid; grid-template-columns: 3px 46px minmax(0, 1fr); gap: 8px; align-items: baseline;
    padding: 4px 6px 4px 0; border-radius: 3px; font-size: 12.5px; line-height: 1.5; color: var(--ink-2);
  }
  .toc a i { align-self: stretch; border-radius: 2px; background: var(--accent); }
  .toc a .mono { font-size: 10.5px; color: var(--ink-3); }
  .toc a span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .toc .cont { color: var(--ink-3); }
  .toc a:hover { color: var(--ink); background: var(--paper-2); }
  .toc a.active { color: var(--ink); background: var(--paper-2); font-weight: 600; }
  .toc a.active .mono { color: var(--accent); }
  .toc.focus-hot a.cold { opacity: .32; }

  /* 正文 */
  .text { min-width: 0; max-width: calc(var(--measure) + var(--gutter)); padding-left: var(--gutter); }
  .chapter { padding-bottom: 36px; scroll-margin-top: 48px; }
  .chapter + .chapter { padding-top: 30px; border-top: 1px solid var(--line); }
  .ch-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
  .ch-no { font: 11px var(--mono); color: var(--accent); }
  .ts {
    display: inline-flex; align-items: center; gap: 5px; height: 20px; padding: 0 7px;
    border: 1px solid var(--line-2); border-radius: 10px; font: 11px var(--mono); color: var(--ink-2);
  }
  .ts svg { width: 7px; height: 8px; }
  .ts:hover { border-color: var(--accent); color: var(--accent); }
  .ch-heat { font-size: 11px; color: var(--ink-3); }
  .ch-heat.hot { color: var(--accent); }
  .chapter h2 { margin: 0 0 18px; font: 600 22px/1.4 var(--serif); text-wrap: balance; }
  .turn { position: relative; margin-bottom: 1.1em; }
  .who { position: absolute; left: calc(-1 * var(--gutter)); width: calc(var(--gutter) - 20px); top: .4em; text-align: right; font-size: 12px; line-height: 1.4; color: var(--ink-3); }
  .turn.guest .who { color: var(--accent); }
  .turn p { margin: 0 0 .9em; font: var(--size)/1.88 var(--serif); color: var(--ink); text-align: justify; text-justify: inter-character; hanging-punctuation: allow-end; }
  .turn.host p { color: var(--ink-2); }
  .turn p:last-child { margin-bottom: 0; }
  .ad { margin: 0 0 1.1em; border: 1px dashed var(--line-2); border-radius: 6px; padding: 6px 12px; font-size: 12.5px; color: var(--ink-3); }
  .ad summary { cursor: pointer; list-style: none; }
  .ad summary::-webkit-details-marker { display: none; }
  .ad summary::after { content: "展开"; margin-left: 8px; color: var(--ink-2); }
  .ad[open] summary::after { content: "收起"; }
  .ad p { margin: 8px 0 0; font: 14px/1.75 var(--serif); }
  .end { padding: 18px 0 80px; border-top: 1px solid var(--ink); display: flex; justify-content: space-between; font-size: 12.5px; color: var(--ink-3); }

  /* 右侧工具 */
  .tools { position: sticky; top: 46px; align-self: start; display: flex; flex-direction: column; gap: 22px; font-size: 12px; }
  .tools h3 { margin: 0 0 8px; font: 600 11px/1 var(--sans); letter-spacing: .12em; color: var(--ink-3); }
  .seg-ctl { display: flex; border: 1px solid var(--line-2); border-radius: 6px; overflow: hidden; }
  .seg-ctl button { flex: 1; height: 26px; font-size: 12px; color: var(--ink-2); }
  .seg-ctl button + button { border-left: 1px solid var(--line-2); }
  .seg-ctl button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
  .seg-ctl output { flex: 1.2; display: grid; place-items: center; font: 11px var(--mono); color: var(--ink); border-left: 1px solid var(--line-2); border-right: 1px solid var(--line-2); }
  .setting + .setting { margin-top: 8px; }
  .setting label { display: block; margin-bottom: 4px; color: var(--ink-3); font-size: 11px; }
  .now-title { font: 500 13.5px/1.5 var(--serif); margin: 0 0 8px; }
  .share { display: flex; height: 6px; border-radius: 3px; overflow: hidden; background: var(--paper-3); }
  .share i { display: block; height: 100%; }
  .share-legend { margin-top: 6px; display: flex; flex-direction: column; gap: 2px; color: var(--ink-2); }
  .share-legend span { display: flex; justify-content: space-between; gap: 8px; }
  .share-legend span b { font-weight: 400; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .share-legend span::before { content: ""; flex: none; width: 7px; height: 7px; border-radius: 2px; margin-top: 5px; background: var(--c); }
  .share-legend .mono { color: var(--ink-3); font-size: 10.5px; margin-left: auto; }
  .now-meta { margin-top: 8px; color: var(--ink-3); font: 11px var(--mono); }
  .top-list { margin: 0; padding: 0; list-style: none; }
  .top-list a { display: block; padding: 4px 0; border-bottom: 1px solid var(--line); line-height: 1.5; color: var(--ink-2); }
  .top-list a:hover { color: var(--ink); }
  .top-list .mono { color: var(--accent); font-size: 10.5px; margin-right: 6px; }

  /* ---------- 响应式 ---------- */
  @media (max-width: 1279px) {
    .body { grid-template-columns: 232px minmax(0, 1fr); }
    .tools { display: none; }
    .band-btn.set { display: block; }
    :root { --gutter: 96px; }
  }
  @media (max-width: 899px) {
    .wrap { padding: 0 16px; }
    .page-article .topbar { padding: 0 16px; }
    .head { grid-template-columns: 1fr; gap: 14px; padding-top: 18px; }
    .head-aside { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 12px; align-items: start; }
    .head-aside .links { grid-column: 2; flex-direction: column; gap: 4px; }
    .head-aside .peak { grid-column: 1 / -1; }
    .page-article h1 { font-size: 25px; }
    .body { grid-template-columns: minmax(0, 1fr); padding-top: 20px; }
    .rail { display: none; }
    .band-btn.toc-btn { display: block; }
    .band-meta { min-width: 0; }
    .band-legend { display: none; }
    .ticks span:not(:first-child):not(:last-child) { display: none; }
    :root { --gutter: 0px; }
    .who { position: static; width: auto; text-align: left; display: block; margin-bottom: 2px; }
    .turn p { text-align: left; }
  }
  @media (max-width: 520px) {
    .band-meta .total, .crumb .t { display: none; }
    .head-aside { grid-template-columns: 96px minmax(0, 1fr); }
  }

/* 新鲜度墨点：按 addedAt 计算的半衰期透明度（reader/catalog.js 运行时写入 --freshness-opacity） */
.freshness-mark {
  display: inline-block; width: 5px; height: 5px; margin: 0 6px 1px 0; vertical-align: middle;
  border-radius: 50%; background: var(--accent); opacity: var(--freshness-opacity, 0.12);
}

/* 分享清单标题行 */
.list-heading { max-width: 1520px; margin: 0 auto; display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; padding: 14px 28px 12px; border-bottom: 1px solid var(--line); }
.list-heading h1 { margin: 0; font: 600 20px/1.3 var(--serif); }
.list-heading span { font-size: 12px; color: var(--ink-3); }
@media (max-width: 960px) { .list-heading { padding: 12px 16px 10px; } }
.group-head h3 a:hover { color: var(--accent); }
.page-month .stage { max-width: 1520px; margin: 0 auto; }
.page-month .group-head { top: var(--bar-h); }

/* 窄屏「Aa」展开的设置条 */
.band-settings { display: flex; gap: 24px; flex-wrap: wrap; }
.band-settings .setting { margin: 0; min-width: 180px; }

/* 列表标题是真实链接（无 JS 也能进入文章） */
a.row-title:hover { color: var(--accent); }

/* Language links share the existing ink/paper hierarchy and stay available without scripts. */
.language-switch { white-space: nowrap; font-size: 12px; }
.language-at-chapter { margin-left: auto; font-size: 11px; }
.source-notes { margin-bottom: 2rem; color: var(--ink-3); font-size: .82em; }
.source-notes summary { cursor: pointer; }
.source-notes p { margin-top: .6rem; }
html[lang="en"] .text { line-height: 1.75; }
html[lang="en"] .kicker { letter-spacing: .02em; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Keep the home language link outside the navigation hidden on narrow screens. */
.page-home .topbar-end { flex: none; }
.home-language-switch { display: inline-flex; align-items: center; min-height: 32px; color: var(--ink-2); }
.home-language-switch:hover { color: var(--ink); }
@media (max-width: 520px) {
  .page-home .topbar { padding-inline: 12px; gap: 10px; }
  .page-home .topbar-end { gap: 10px; }
  .page-home .wordmark b { font-size: 12px; letter-spacing: .12em; }
  .page-home .search { padding-inline: 8px; gap: 6px; }
  .page-home .search .kbd { display: none; }
}