:root {
  --bg: #f3f5f7;
  --surface: #ffffff;
  --surface-2: #e9edf1;
  --ink: #17202a;
  --muted: #5f6b76;
  --line: #cbd3da;
  --red: #b13b3b;
  --orange: #b76518;
  --blue: #256a8a;
  --green: #377a57;
  --purple: #6f5290;
  --yellow: #a27c13;
  --teal: #247c79;
  --shadow: 0 2px 10px rgba(23, 32, 42, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  letter-spacing: 0;
}
button, input { font: inherit; letter-spacing: 0; }
button { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.app-shell { min-height: 100vh; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding: max(28px, env(safe-area-inset-top)) max(clamp(18px, 4vw, 64px), env(safe-area-inset-right)) 24px max(clamp(18px, 4vw, 64px), env(safe-area-inset-left));
  background: #16232d;
  color: #f8fafb;
  border-bottom: 5px solid var(--red);
}
.eyebrow { color: #d6b865; font-weight: 500; margin-bottom: 5px; }
h1 { margin: 0; font-size: clamp(26px, 4vw, 42px); font-weight: 500; }
.title-block p { margin: 7px 0 0; color: #bdc9d1; }
.header-facts { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 18px; color: #d5dde2; }
.header-facts span { white-space: nowrap; }
.header-facts strong { color: #fff; font-size: 19px; font-weight: 500; }

.toolbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 10px max(clamp(18px, 4vw, 64px), env(safe-area-inset-right)) 10px max(clamp(18px, 4vw, 64px), env(safe-area-inset-left));
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 8px rgba(23,32,42,.06);
}
.view-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tab-button {
  border: 0;
  background: transparent;
  border-radius: 4px;
  padding: 8px 11px;
  color: var(--muted);
  min-height: 38px;
}
.tab-button:hover { background: var(--surface-2); color: var(--ink); }
.tab-button[aria-selected="true"] { background: #253642; color: #fff; }
.toolbar-actions { display: flex; align-items: center; gap: 10px; }
.search-box {
  height: 38px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
}
.search-box svg { width: 16px; height: 16px; color: var(--muted); }
.search-box input { width: min(25vw, 280px); border: 0; outline: 0; background: transparent; color: var(--ink); }
.recite-switch { display: flex; align-items: center; gap: 6px; white-space: nowrap; color: var(--muted); }
.recite-switch input { width: 18px; height: 18px; accent-color: #253642; }
.icon-button { width: 38px; height: 38px; padding: 0; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 4px; background: #fff; }
.icon-button:hover { background: var(--surface-2); }
.icon-button svg { width: 18px; height: 18px; }

#main-content { max-width: 1500px; margin: 0 auto; padding: 26px max(clamp(18px, 4vw, 64px), env(safe-area-inset-right)) max(60px, env(safe-area-inset-bottom)) max(clamp(18px, 4vw, 64px), env(safe-area-inset-left)); outline: none; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 18px; }
.section-heading h2 { margin: 0; font-size: 25px; font-weight: 500; }
.section-heading p { margin: 5px 0 0; color: var(--muted); }
.page-chip { flex: none; color: var(--blue); font-weight: 500; }

.overview-lead {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(250px, 1fr);
  gap: 22px;
  margin-bottom: 28px;
}
.master-axis { position: relative; min-height: 104px; padding: 36px 0 6px; }
.master-axis::before { content: ""; position: absolute; left: 0; right: 0; top: 58px; height: 3px; background: #5d6b75; }
.axis-dates { position: relative; display: grid; grid-template-columns: repeat(7, 1fr); align-items: start; }
.axis-date { position: relative; text-align: center; color: var(--muted); padding: 35px 4px 0; }
.axis-date::before { content: ""; position: absolute; top: 15px; left: 50%; width: 11px; height: 11px; margin-left: -6px; border: 3px solid var(--surface); border-radius: 50%; background: var(--unit-color); box-shadow: 0 0 0 2px var(--unit-color); }
.axis-date strong { display: block; color: var(--ink); }
.big-memory { background: #263741; color: #fff; border-left: 5px solid #d6b865; padding: 18px 20px; }
.big-memory h3 { margin: 0 0 8px; font-size: 17px; font-weight: 500; color: #f2d782; }
.big-memory p { margin: 0; line-height: 1.75; }

.phase-map { display: grid; gap: 18px; }
.phase-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  position: relative;
}
.phase-label { border-top: 4px solid var(--unit-color); padding-top: 10px; }
.phase-label .unit-number { color: var(--unit-color); font-weight: 500; }
.phase-label h3 { margin: 5px 0; font-size: 18px; font-weight: 500; }
.phase-label p { margin: 0; color: var(--muted); line-height: 1.55; }
.phase-events { display: flex; flex-wrap: wrap; align-content: flex-start; gap: 8px; padding: 8px 0; border-top: 1px solid var(--line); }
.event-node {
  border: 1px solid var(--line);
  border-left: 4px solid var(--type-color);
  border-radius: 4px;
  background: var(--surface);
  padding: 8px 10px;
  text-align: left;
  box-shadow: var(--shadow);
  min-height: 58px;
  max-width: 260px;
}
.event-node:hover, .event-node:focus-visible { border-color: var(--type-color); transform: translateY(-1px); }
.event-node strong, .event-node span { display: block; }
.event-node strong { color: var(--type-color); font-size: 13px; margin-bottom: 3px; }
.event-node span { line-height: 1.35; }
.event-node em { display: block; color: var(--muted); font-size: 12px; font-style: normal; margin-top: 3px; }

.selected-detail { margin: 24px 0 0 214px; border-left: 5px solid var(--type-color); background: var(--surface); box-shadow: var(--shadow); padding: 20px 22px; }
.selected-detail-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.selected-detail h3 { margin: 0; font-size: 21px; font-weight: 500; }
.selected-detail .date { color: var(--type-color); font-weight: 500; margin-bottom: 4px; }
.detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 13px 22px; margin-top: 16px; }
.detail-grid div { border-top: 1px solid var(--line); padding-top: 8px; line-height: 1.65; }
.detail-grid strong { color: var(--muted); font-weight: 500; margin-right: 6px; }
.memory-line { grid-column: 1 / -1; color: var(--purple); }

.unit-banner { display: grid; grid-template-columns: minmax(0,1fr) minmax(260px,.55fr); gap: 24px; align-items: center; margin-bottom: 24px; border-top: 5px solid var(--unit-color); padding-top: 16px; }
.unit-banner h2 { margin: 0; font-size: 26px; font-weight: 500; }
.unit-banner p { color: var(--muted); margin: 6px 0 0; }
.unit-memory { background: #253642; color: #fff; border-left: 5px solid var(--unit-color); padding: 15px 18px; line-height: 1.65; }
.event-timeline { position: relative; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 48px; }
.event-timeline::before { content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; margin-left: -1px; background: var(--line); }
.event-card { position: relative; background: var(--surface); border-radius: 5px; box-shadow: var(--shadow); padding: 16px 18px 17px; border-top: 4px solid var(--type-color); }
.event-card::after { content: ""; position: absolute; top: 24px; width: 14px; height: 14px; border-radius: 50%; background: var(--type-color); box-shadow: 0 0 0 5px var(--bg); }
.event-card:nth-child(odd)::after { right: -32px; }
.event-card:nth-child(even)::after { left: -32px; }
.event-card:nth-child(even) { margin-top: 48px; }
.event-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 7px 10px; margin-bottom: 7px; }
.event-date { color: var(--type-color); font-weight: 500; }
.event-type, .event-pages { font-size: 12px; color: var(--muted); }
.event-pages { margin-left: auto; color: var(--blue); font-weight: 500; }
.event-card h3 { margin: 0 0 10px; font-size: 19px; font-weight: 500; }
.event-card dl { margin: 0; display: grid; gap: 8px; }
.event-card dl > div { display: grid; grid-template-columns: 54px 1fr; gap: 8px; line-height: 1.55; }
.event-card dt { color: var(--muted); font-weight: 500; }
.event-card dd { margin: 0; }
.event-card .memory { margin: 12px 0 0; padding-top: 10px; border-top: 1px dashed var(--line); color: var(--purple); line-height: 1.55; }
.event-card .memory strong { font-weight: 500; }

.recite .event-card dl, .recite .event-card .memory, .recite .selected-detail .detail-grid { filter: blur(5px); user-select: none; transition: filter .15s; }
.recite .event-card:hover dl, .recite .event-card:focus-within dl,
.recite .event-card:hover .memory, .recite .event-card:focus-within .memory,
.recite .selected-detail:hover .detail-grid { filter: none; }
.recite .event-card::before { content: "回忆后移入查看"; display: block; color: var(--muted); font-size: 12px; margin-bottom: 8px; }

.no-results { padding: 50px 0; text-align: center; color: var(--muted); }
#print-content { display: none; }

@media (max-width: 1000px) {
  .toolbar { align-items: flex-start; flex-direction: column; }
  .toolbar-actions { width: 100%; }
  .search-box { flex: 1; }
  .search-box input { width: 100%; }
  .overview-lead { grid-template-columns: 1fr; }
  .phase-row { grid-template-columns: 160px minmax(0,1fr); gap: 18px; }
  .selected-detail { margin-left: 178px; }
}

@media (min-width: 721px) and (max-width: 1100px) {
  .topbar { padding-bottom: 20px; }
  .toolbar { position: relative; }
  .view-tabs { width: 100%; }
  .tab-button { min-height: 44px; padding-inline: 13px; }
  .toolbar-actions { width: 100%; }
  .search-box { flex: 1; min-height: 44px; }
  .recite-switch, .icon-button { min-height: 44px; }
  .overview-lead { grid-template-columns: 1fr; }
  .phase-row { grid-template-columns: 170px minmax(0, 1fr); }
  .selected-detail { margin-left: 194px; }
  .unit-banner { grid-template-columns: minmax(0, 1fr) minmax(220px, .65fr); }
  .event-timeline { gap: 16px 38px; }
  .event-card:nth-child(odd)::after { right: -27px; }
  .event-card:nth-child(even)::after { left: -27px; }
}

@media (max-width: 720px) {
  .topbar { align-items: flex-start; flex-direction: column; gap: 18px; padding-top: max(22px, env(safe-area-inset-top)); }
  h1 { font-size: 28px; }
  .title-block p { line-height: 1.5; }
  .header-facts { justify-content: flex-start; }
  .toolbar { position: relative; padding-top: 12px; padding-bottom: 12px; }
  .view-tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); width: 100%; gap: 6px; }
  .tab-button { min-height: 44px; padding: 8px 4px; }
  .toolbar-actions { flex-wrap: wrap; }
  .search-box { min-width: 100%; height: 44px; }
  .recite-switch { min-height: 44px; padding: 0 4px; }
  .icon-button { width: 44px; height: 44px; }
  #main-content { padding-top: 22px; }
  .section-heading { align-items: flex-start; }
  .section-heading h2 { font-size: 24px; }
  .section-heading .page-chip { padding-top: 7px; }
  .master-axis { padding-top: 24px; }
  .master-axis::before { top: 46px; }
  .axis-date { padding-inline: 1px; font-size: 11px; }
  .axis-date strong { font-size: 12px; overflow-wrap: anywhere; }
  .big-memory { padding: 16px; }
  .phase-row { grid-template-columns: 1fr; gap: 5px; }
  .phase-label { border-top-width: 3px; }
  .event-node { max-width: none; flex: 1 1 145px; }
  .selected-detail { margin-left: 0; }
  .selected-detail { padding: 17px 16px; }
  .selected-detail-head { gap: 10px; }
  .selected-detail h3 { font-size: 19px; }
  .detail-grid { grid-template-columns: 1fr; }
  .unit-banner { grid-template-columns: 1fr; }
  .event-timeline { grid-template-columns: 1fr; gap: 14px; }
  .event-timeline::before, .event-card::after { display: none; }
  .event-card:nth-child(even) { margin-top: 0; }
  .event-card { padding: 15px 16px; }
  .event-card dl > div { grid-template-columns: 48px 1fr; }
}

@media (max-width: 430px) {
  .header-facts { display: grid; grid-template-columns: repeat(2, max-content); width: 100%; justify-content: space-between; }
  .section-heading { display: grid; grid-template-columns: minmax(0, 1fr) auto; }
  .section-heading p { grid-column: 1 / -1; }
  .axis-dates { grid-template-columns: repeat(7, minmax(0, 1fr)); }
  .event-node { flex-basis: calc(50% - 5px); min-width: 0; padding: 8px; }
  .event-node span { overflow-wrap: anywhere; }
}

@media (max-width: 370px) {
  .view-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .header-facts { grid-template-columns: repeat(2, 1fr); }
  .event-node { flex-basis: 100%; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading .page-chip { padding-top: 0; }
}

@media (orientation: landscape) and (max-height: 500px) and (max-width: 950px) {
  .topbar { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; padding-top: max(14px, env(safe-area-inset-top)); padding-bottom: 14px; }
  .topbar h1 { font-size: 25px; }
  .title-block p { display: none; }
  .header-facts { justify-content: flex-end; }
  .toolbar { position: relative; }
  .view-tabs { grid-template-columns: repeat(8, minmax(0, 1fr)); }
  .toolbar-actions { display: grid; grid-template-columns: minmax(240px, 1fr) auto auto; }
  .search-box { min-width: 0; }
}

@media print {
  @page { size: A4 landscape; margin: 7mm; }
  body { background: #fff; color: #111; font-size: 8pt; }
  .topbar, .toolbar, #main-content { display: none !important; }
  #print-content { display: block; }
  .print-cover { min-height: 178mm; display: flex; flex-direction: column; justify-content: center; border-top: 12mm solid #20313d; padding: 12mm; }
  .print-cover h1 { font-size: 30pt; color: #17202a; }
  .print-cover p { font-size: 14pt; color: #5f6b76; }
  .print-cover .cover-line { margin-top: 15mm; font-size: 17pt; color: #8f2f2f; }
  .print-unit { break-before: page; }
  .print-unit-head { display: flex; justify-content: space-between; align-items: flex-end; border-bottom: 3px solid var(--unit-color); padding-bottom: 2mm; margin-bottom: 3mm; }
  .print-unit-head h2 { margin: 0; font-size: 16pt; font-weight: 500; }
  .print-unit-head p { margin: 1mm 0 0; color: #4f5962; }
  .print-memory { max-width: 45%; text-align: right; color: #6f5290; }
  .print-grid { column-count: 4; column-gap: 5mm; }
  .print-event { break-inside: avoid; border-top: 2px solid var(--type-color); padding: 1.5mm 0 2mm; margin-bottom: 1mm; }
  .print-event h3 { font-size: 9.5pt; margin: 0 0 .7mm; font-weight: 500; }
  .print-event .print-meta { color: var(--type-color); font-weight: 500; }
  .print-event p { margin: .5mm 0; line-height: 1.28; }
  .print-event strong { color: #4f5962; font-weight: 500; }
  .print-event .print-memo { color: #6f5290; }
  .print-source { break-before: page; padding: 12mm; }
  .print-source h2 { font-size: 18pt; }
  .print-source li { margin: 3mm 0; line-height: 1.6; }
}