*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-soft: #f1f0ed;
  --text: #171717;
  --muted: #6b7280;
  --line: #e2e0dc;
  --dark: #0f172a;          /* slate-900 */
  --darker: #0b1120;        /* sidebar bg */
  --accent: #c2410c;        /* indigo-600 */
  --accent-muted: #fb923c;  /* indigo-400 */
  --accent-bg: #fff7ed;     /* indigo-50 */
  --accent-border: #fed7aa; /* indigo-200 */
  --green: #059669;
  --green-bg: #ecfdf5;
  --blue: #2563eb;
  --blue-bg: #eff6ff;
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --shadow: 0 1px 2px rgba(0,0,0,.06), 0 8px 24px rgba(15,23,42,.08);
  --radius: 10px;
  --sidebar-w: 260px;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

button, input, select {
  font: inherit;
}

button {
  cursor: pointer;
}

/* ─── Top Bar ─── */

.top-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--dark);
  color: #fff;
  padding: 0 1rem;
  height: 60px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 40;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.3rem;
  padding: .3rem;
  line-height: 1;
}

.top-bar-left {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  min-width: 0;
}

.top-eyebrow {
  color: var(--accent-muted);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.top-title {
  font-size: 1.2rem;
  font-weight: 900;
  letter-spacing: .02em;
  white-space: nowrap;
}

/* ─── Board Switcher ─── */

.board-switcher {
  display: flex;
  align-items: center;
  gap: .35rem;
  margin-left: auto;
  min-width: 0;
  flex: 1 1 auto;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.board-switcher::-webkit-scrollbar { display: none; }

.switcher-item {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  flex-shrink: 0;
  padding: .35rem .7rem;
  border-radius: 999px;
  color: rgba(255,255,255,.7);
  text-decoration: none;
  font-size: .82rem;
  font-weight: 700;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background .12s, color .12s, border-color .12s;
}

.switcher-item:hover {
  background: rgba(255,255,255,.1);
  color: #fff;
}

.switcher-item.active {
  background: var(--accent, #c2410c);
  color: #fff;
  border-color: var(--accent, #c2410c);
}

.switcher-overview {
  color: rgba(255,255,255,.6);
}

.switcher-icon {
  font-size: .9rem;
  line-height: 1;
}

/* ─── Layout ─── */

.layout {
  display: flex;
  flex: 1;
  min-height: 0;
}

/* ─── Sidebar ─── */

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--darker);
  color: rgba(255,255,255,.8);
  overflow-y: auto;
  padding: .75rem 0 2rem;
  position: sticky;
  top: 60px;
  height: calc(100vh - 60px);
  z-index: 30;
}

.nav-tree {
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item {
  margin: 0;
}

.nav-item a,
.nav-toggle {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .55rem 1rem .55rem 1.2rem;
  color: rgba(255,255,255,.7);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 600;
  transition: background .12s, color .12s;
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  line-height: 1.4;
}

.nav-item a:hover,
.nav-toggle:hover {
  background: rgba(255,255,255,.06);
  color: #fff;
}

.nav-item a.active {
  background: rgba(194,65,12,.25);
  color: var(--accent-muted);
  font-weight: 800;
}

.nav-toggle .nav-arrow {
  margin-left: auto;
  font-size: .7rem;
  opacity: .5;
  transition: transform .2s;
  flex-shrink: 0;
}

.nav-toggle.open .nav-arrow {
  transform: rotate(90deg);
}

.nav-icon {
  flex-shrink: 0;
  font-size: 1rem;
  width: 1.4rem;
  text-align: center;
}

.nav-label {
  flex: 1;
  min-width: 0;
}

.nav-children {
  list-style: none;
  padding: 0;
  margin: 0;
  overflow: hidden;
  transition: max-height .25s ease, opacity .2s ease;
  max-height: 0;
  opacity: 0;
}

.nav-children.open {
  max-height: 2000px;
  opacity: 1;
}

.nav-children .nav-item a {
  padding-left: 2.6rem;
  font-size: .84rem;
  font-weight: 500;
  color: rgba(255,255,255,.55);
}

.nav-children .nav-item a:hover {
  color: rgba(255,255,255,.85);
}

.nav-children .nav-item a.active {
  color: var(--accent-muted);
  font-weight: 700;
  background: rgba(194,65,12,.15);
}

.nav-divider {
  height: 1px;
  background: rgba(255,255,255,.08);
  margin: .4rem 1rem;
}

/* ─── Main ─── */

.main {
  flex: 1;
  min-width: 0;
  padding: 1.5rem 2rem 3rem;
}

/* ─── Home page ─── */

.welcome {
  padding: 0;
  animation: fadeIn .25s ease;
}

.home-hero {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
}

.home-hero-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--dark);
  letter-spacing: .02em;
}

.home-hero-desc {
  margin-top: .7rem;
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.7;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.home-section {
  margin-top: 1.5rem;
  padding: 0 .25rem;
}

.home-empty {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  border: 1px dashed var(--border, #d8cfc4);
  border-radius: 12px;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.7;
}

.home-section-title {
  font-size: .9rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: .06em;
  margin-bottom: .8rem;
  padding-bottom: .4rem;
  border-bottom: 2px solid var(--accent-border);
  text-transform: uppercase;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .7rem;
}

.home-card {
  display: flex;
  flex-direction: column;
  gap: .2rem;
  padding: 1rem 1rem .9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: border-color .15s, transform .15s, box-shadow .15s;
}

.home-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(194,65,12,.1);
}

.home-card-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.home-card-title {
  font-size: .95rem;
  font-weight: 800;
  color: var(--text);
  margin-top: .15rem;
}

.home-card-desc {
  font-size: .78rem;
  color: var(--muted);
  line-height: 1.4;
  font-weight: 500;
}

/* ─── Quick reference ─── */

.quickref-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: .7rem;
}

.quickref-card {
  padding: 1rem .8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: center;
}

.quickref-label {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--dark);
  letter-spacing: .04em;
}

.quickref-slogan {
  margin-top: .4rem;
  font-size: .8rem;
  color: var(--accent);
  font-weight: 700;
  line-height: 1.4;
}

.quickref-models {
  margin-top: .4rem;
  font-size: .72rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: .02em;
}

/* ─── Recent updates ─── */

.updates-list {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.updates-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: background .12s;
}

.updates-item:last-child {
  border-bottom: none;
}

.updates-item:hover {
  background: var(--surface-soft);
}

.updates-item:hover .updates-arrow {
  transform: translateX(3px);
}

.updates-date {
  flex-shrink: 0;
  font-size: .75rem;
  font-weight: 700;
  color: var(--muted);
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .15rem .45rem;
  letter-spacing: .02em;
}

.updates-text {
  flex: 1;
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  min-width: 0;
}

.updates-arrow {
  flex-shrink: 0;
  font-size: .8rem;
  color: var(--accent);
  font-weight: 700;
  transition: transform .15s;
}

/* ─── Breadcrumb ─── */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: .35rem;
  margin-bottom: .6rem;
  font-size: .8rem;
  color: var(--muted);
}

.breadcrumb-home {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  transition: color .12s;
}

.breadcrumb-home:hover {
  color: var(--dark);
  text-decoration: underline;
}

.breadcrumb-sep {
  color: var(--line);
  font-weight: 300;
}

/* ─── Content ─── */

.content-area {
  animation: fadeIn .25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-section {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--dark);
  letter-spacing: .02em;
  margin-bottom: .5rem;
}

.page-desc {
  color: var(--muted);
  font-size: .95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 720px;
}

/* ─── Cards ─── */

.card-group {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .85rem 1.1rem;
  cursor: pointer;
  user-select: none;
  transition: background .12s;
}

.card-header:hover {
  background: var(--surface-soft);
}

.card-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
}

.card-title {
  flex: 1;
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
}

.card-arrow {
  flex-shrink: 0;
  font-size: .75rem;
  color: var(--muted);
  transition: transform .2s;
}

.card.open .card-arrow {
  transform: rotate(90deg);
}

.card-body {
  overflow: hidden;
  transition: max-height .3s ease, opacity .2s ease;
}

.card.collapsed .card-body {
  max-height: 0 !important;
  opacity: 0;
}

.card-inner {
  padding: .2rem 1.1rem 1.1rem;
  border-top: 1px solid var(--line);
}

.card-inner p {
  margin-top: .6rem;
  color: #33302d;
  font-size: .9rem;
  line-height: 1.7;
  max-width: 720px;
}

.card-inner p:first-child {
  margin-top: 0;
}

/* ─── Tag pills ─── */

.tag-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: .12rem .5rem;
  font-size: .7rem;
  font-weight: 800;
  white-space: nowrap;
}

.tag-green {
  background: var(--green-bg);
  color: var(--green);
}

.tag-blue {
  background: var(--blue-bg);
  color: var(--blue);
}

.tag-amber {
  background: var(--amber-bg);
  color: var(--amber);
}

.tag-red {
  background: var(--red-bg);
  color: var(--red);
}

.tag-accent {
  background: var(--accent-bg);
  color: var(--accent);
}

/* ─── Comparison table ─── */

.comp-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: .75rem;
  font-size: .88rem;
}

.comp-table th,
.comp-table td {
  padding: .7rem .8rem;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.comp-table th {
  background: var(--surface-soft);
  font-weight: 800;
  color: var(--dark);
  font-size: .82rem;
  letter-spacing: .02em;
}

.comp-table tr:last-child td {
  border-bottom: none;
}

.comp-table td:first-child {
  font-weight: 700;
  color: var(--dark);
  white-space: nowrap;
  width: 7rem;
}

/* ─── Nested list ─── */

.nested-list {
  padding-left: 1.2rem;
  margin: .4rem 0;
}

.nested-list li {
  margin: .2rem 0;
  color: #33302d;
  font-size: .88rem;
  line-height: 1.6;
}

.nested-list .note-muted {
  color: var(--muted);
  font-size: .82rem;
}

/* ─── Example box ─── */

.example-box {
  margin: .6rem 0;
  padding: .8rem 1rem;
  border: 1px solid var(--accent-border);
  border-radius: 8px;
  background: var(--accent-bg);
}

.example-box-title {
  font-size: .78rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: .04em;
  margin-bottom: .25rem;
}

.example-box p {
  color: #33302d;
  font-size: .88rem;
  line-height: 1.6;
  margin-top: .3rem;
}

.example-box p:first-of-type {
  margin-top: 0;
}

.code-inline {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: .08rem .35rem;
  font-size: .85rem;
  font-family: "SF Mono", "Fira Code", monospace;
}

/* ─── Divider ─── */

.section-divider {
  height: 1px;
  background: var(--line);
  margin: 1.5rem 0;
}

/* ─── 总览页：隐藏侧边栏，内容居中 ─── */

.on-dashboard .sidebar {
  display: none;
}

.on-dashboard .menu-toggle {
  display: none;
}

/* ─── Board Dashboard (总览) ─── */

.dash {
  max-width: 980px;
  margin: 0 auto;
  animation: fadeIn .25s ease;
}

.dash-hero {
  text-align: center;
  padding: 3.5rem 1rem 2rem;
}

.dash-eyebrow {
  display: inline-block;
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .22em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: .65rem;
}

.dash-title {
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: .02em;
  background: linear-gradient(120deg, var(--dark) 25%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--dark);   /* 回退色 */
}

.dash-desc {
  margin-top: .8rem;
  color: var(--muted);
  font-size: .98rem;
  line-height: 1.7;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.dash-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.dash-card {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  flex: 1 1 260px;
  max-width: 300px;
  padding: 1.4rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-decoration: none;
  border-top: 3px solid var(--accent, #c2410c);
  transition: transform .15s, box-shadow .15s, border-color .15s;
}

.dash-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px rgba(15,23,42,.14);
  border-color: var(--accent);
}

.dash-card-icon {
  font-size: 1.7rem;
  line-height: 1;
}

.dash-card-name {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--text);
}

.dash-card-desc {
  font-size: .84rem;
  color: var(--muted);
  line-height: 1.55;
  font-weight: 500;
}

.dash-card-go {
  margin-top: .35rem;
  font-size: .8rem;
  font-weight: 800;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity .15s, transform .15s;
}

.dash-card:hover .dash-card-go {
  opacity: 1;
  transform: translateX(0);
}

/* ─── Sidebar backdrop (mobile) ─── */

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 25;
  background: rgba(0,0,0,.36);
}

/* ─── Responsive ─── */

@media (max-width: 820px) {
  .menu-toggle {
    display: block;
  }

  .top-eyebrow {
    display: none;
  }

  .top-title {
    font-size: 1rem;
  }

  .board-switcher {
    margin-left: .5rem;
  }

  .switcher-item {
    padding: .3rem .55rem;
    font-size: .76rem;
  }

  .sidebar {
    position: fixed;
    top: 60px;
    left: 0;
    bottom: 0;
    z-index: 30;
    transform: translateX(-100%);
    transition: transform .25s ease;
    height: auto;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main {
    padding: 1rem 1rem 2rem;
  }

  .home-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: .6rem;
  }

  .quickref-grid {
    grid-template-columns: 1fr;
    gap: .6rem;
  }

  .home-hero {
    padding: 1.5rem .5rem 1rem;
  }

  .home-hero-title {
    font-size: 1.4rem;
  }
}

@media (min-width: 821px) {
  .sidebar-backdrop {
    display: none !important;
  }

  .home-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1000px) {
  .home-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== 文档体（笔记整篇渲染） ===== */
.doc-body { max-width: 780px; }
.doc-body h1, .doc-body h2, .doc-body h3, .doc-body h4 {
  color: var(--dark); line-height: 1.35; margin: 1.4rem 0 .6rem;
}
.doc-body h1 { font-size: 1.5rem; font-weight: 900; }
.doc-body h2 { font-size: 1.25rem; font-weight: 800; border-bottom: 1px solid var(--line); padding-bottom: .3rem; }
.doc-body h3 { font-size: 1.08rem; font-weight: 800; }
.doc-body h4 { font-size: 1rem; font-weight: 800; color: #33302d; }
.doc-body p { margin: .6rem 0; line-height: 1.78; color: #2b2b2b; }
.doc-body ul, .doc-body ol { margin: .5rem 0 0 1.4rem; line-height: 1.7; }
.doc-body li { margin: .28rem 0; }
.doc-body a { color: var(--accent); text-decoration: none; }
.doc-body a:hover { text-decoration: underline; }
.doc-body code {
  background: var(--surface-soft); border: 1px solid var(--line); border-radius: 4px;
  padding: .05rem .35rem; font-size: .85em; font-family: "SF Mono", "Fira Code", monospace;
}
.doc-body pre {
  background: var(--darker); color: #e2e8f0; padding: .9rem 1rem; border-radius: 8px;
  overflow: auto; font-size: .85rem; line-height: 1.55; margin: .8rem 0;
}
.doc-body pre code { background: none; border: none; color: inherit; padding: 0; }
.doc-body table { border-collapse: collapse; width: 100%; margin: .9rem 0; font-size: .88rem; }
.doc-body th, .doc-body td { border: 1px solid var(--line); padding: .55rem .7rem; text-align: left; vertical-align: top; }
.doc-body th { background: var(--surface-soft); font-weight: 800; color: var(--dark); }
.doc-body blockquote {
  border-left: 3px solid var(--line); padding: .3rem 0 .3rem 1rem; color: var(--muted); margin: .6rem 0;
}

/* ===== Obsidian callout ===== */
.callout {
  border: 1px solid var(--line); border-left: 4px solid var(--accent);
  border-radius: 8px; background: var(--surface); margin: .9rem 0; overflow: hidden;
}
.callout > summary {
  cursor: pointer; padding: .6rem .9rem; font-weight: 800; color: var(--dark);
  list-style: none; display: flex; align-items: center; gap: .5rem; user-select: none;
}
.callout > summary::-webkit-details-marker { display: none; }
.callout > summary::before { content: "\25B8"; transition: transform .2s; color: var(--muted); }
.callout[open] > summary::before { transform: rotate(90deg); }
.callout .callout-body { padding: .2rem .9rem .9rem; }
.callout-note, .callout-info { border-left-color: var(--blue); }
.callout-note > summary, .callout-info > summary { color: var(--blue); }
.callout-question { border-left-color: var(--amber); }
.callout-question > summary { color: var(--amber); }
.callout-tip, .callout-success { border-left-color: var(--green); }
.callout-tip > summary, .callout-success > summary { color: var(--green); }
.callout-warning, .callout-danger, .callout-failure, .callout-bug { border-left-color: var(--red); }
.callout-warning > summary, .callout-danger > summary, .callout-failure > summary, .callout-bug > summary { color: var(--red); }
.callout-example { border-left-color: var(--accent); }
.callout-abstract, .callout-summary { border-left-color: #8b5cf6; }
.callout-abstract > summary, .callout-summary > summary { color: #8b5cf6; }

/* ===== wiki 内链 ===== */
.wikilink { color: var(--accent); text-decoration: none; border-bottom: 1px dashed var(--accent); }
.wikilink:hover { background: var(--accent-bg); }
.wikilink-missing { color: var(--red); border-bottom: 1px dotted var(--red); }

/* ===== 转录来源条 ===== */
.source-meta {
  display: flex; flex-wrap: wrap; gap: .5rem; align-items: center;
  background: var(--accent-bg); border: 1px solid var(--accent-border);
  border-radius: 8px; padding: .6rem .9rem; margin-bottom: 1rem;
  font-size: .85rem; color: var(--accent); font-weight: 600;
}
.source-meta a { color: var(--accent); }

/* ===== 任务清单 ===== */
li.task { list-style: none; }
li.task input { margin-right: .45rem; vertical-align: middle; }

/* ===== 领域地图：分类 / 时间轴 视图 ===== */
.view-tabs {
  display: flex;
  gap: .3rem;
  margin: 1.2rem 0 1rem;
  border-bottom: 1px solid var(--line);
}
.view-tab {
  border: none;
  background: none;
  padding: .55rem .9rem;
  font-size: .92rem;
  font-weight: 700;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  border-radius: 6px 6px 0 0;
  transition: color .15s, border-color .15s, background .15s;
}
.view-tab:hover { color: var(--accent); background: var(--accent-bg); }
.view-tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.cat-group { margin-bottom: 1.6rem; }
.cat-group-title {
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .05em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: .7rem;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.cat-count {
  font-size: .72rem;
  font-weight: 700;
  color: var(--muted);
  background: var(--surface-soft);
  border-radius: 20px;
  padding: .05rem .5rem;
}
.rec-list { display: flex; flex-direction: column; gap: .5rem; }

.rec-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.rec-head {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .7rem .9rem;
  cursor: pointer;
  user-select: none;
}
.rec-head:hover { background: var(--accent-bg); }
.rec-title { font-size: .95rem; font-weight: 700; color: var(--text); flex: 1; }
.rec-date {
  font-size: .76rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  border-radius: 6px;
  padding: .05rem .45rem;
  white-space: nowrap;
}
.rec-card.open .rec-head { border-bottom: 1px solid var(--line); }
.rec-body { padding: .2rem .9rem .9rem; font-size: .9rem; line-height: 1.7; }
.rec-body[hidden] { display: none; }

/* 时间轴 */
.tl { position: relative; padding-left: 1.4rem; margin-bottom: .5rem; }
.tl::before {
  content: "";
  position: absolute;
  left: .4rem; top: .4rem; bottom: .4rem;
  width: 2px;
  background: var(--accent-border);
}
.tl-item { position: relative; margin-bottom: .6rem; }
.tl-dot {
  position: absolute;
  left: -1.08rem; top: .85rem;
  width: .65rem; height: .65rem;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  box-shadow: 0 0 0 2px var(--accent-border);
}
.tl-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.rec-cat {
  font-size: .72rem;
  font-weight: 700;
  color: var(--muted);
  background: var(--surface-soft);
  border-radius: 20px;
  padding: .05rem .5rem;
  white-space: nowrap;
}
.tl-undated-title { margin-top: 1.4rem; }