.shang-page { background: radial-gradient(ellipse at 91% 3%, rgba(255,255,255,.6), transparent 40%), #eee7da; }
.site-header { width: min(1320px, calc(100% - 72px)); margin: 0 auto; padding: 20px 0 15px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.header-back { color: var(--muted); text-decoration: none; font-size: 12px; }
.header-back span { margin-right: 8px; color: var(--accent); }
.page-shell { width: min(1320px, calc(100% - 72px)); margin: 0 auto; padding: 37px 0 50px; }
.page-heading { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin: 0 0 27px; }
.page-heading h1 { margin: 9px 0 7px; font-family: "Songti SC", "Noto Serif CJK SC", "STSong", Georgia, serif; font-size: clamp(32px, 4vw, 48px); font-weight: 500; line-height: 1.2; letter-spacing: -.055em; }
.page-deck { margin: 0; color: #686357; font-family: "Songti SC", "Noto Serif CJK SC", "STSong", serif; font-size: 15px; line-height: 1.75; }
.date-note { max-width: 235px; padding: 2px 0 3px 17px; border-left: 1px solid var(--accent); }
.date-note span { display: block; font-family: Georgia, serif; font-size: 15px; letter-spacing: .025em; }
.date-note small { display: block; margin-top: 7px; color: var(--muted); font-size: 10px; line-height: 1.55; }
.atlas-layout { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(305px, .78fr); align-items: stretch; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(248,245,237,.68); }
.map-column { min-width: 0; padding: 21px 22px 17px; border-right: 1px solid var(--line); }
.map-heading { display: flex; align-items: end; justify-content: space-between; gap: 12px; }
.map-eyebrow { color: var(--muted); font-size: 9px; font-weight: 700; letter-spacing: .16em; }
.map-heading h2 { margin: 6px 0 0; font-family: "Songti SC", "Noto Serif CJK SC", "STSong", serif; font-size: 20px; font-weight: 500; letter-spacing: -.025em; }
.map-period { padding: 6px 9px; color: #6e6554; border: 1px solid rgba(47,43,34,.15); font-size: 10px; white-space: nowrap; }
.map-frame { position: relative; height: clamp(390px, 42vw, 530px); margin-top: 9px; overflow: hidden; background: radial-gradient(ellipse at 50% 48%, rgba(220,214,200,.22), transparent 66%); }
#map { width: 100%; height: 100%; background: #e9e4d9; }
#map.leaflet-container { color: var(--ink); font-family: inherit; }
.leaflet-tile { filter: saturate(.86) sepia(.05) brightness(1.01); }
.leaflet-control-zoom a { color: var(--ink) !important; background: rgba(247,243,234,.92) !important; }
.leaflet-control-attribution { background: rgba(247,243,234,.84) !important; font-size: 8px !important; }
.leaflet-control-scale-line { border-color: #5f584b !important; color: #514b40 !important; background: rgba(247,243,234,.78) !important; font-size: 8px !important; }
.leaflet-tooltip { border: 1px solid rgba(71,64,52,.2); border-radius: 2px; color: #433b31; background: rgba(247,243,234,.94); box-shadow: 0 1px 4px rgba(43,38,30,.12); font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 10px; }
.leaflet-tooltip::before { display: none; }
.province-tooltip { border: 0; color: #716a5e; background: rgba(247,243,234,.43); box-shadow: none; font-size: 11px; letter-spacing: .08em; }
.city-tooltip { color: #5c564b; font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 9px; }
.location-tooltip, .event-tooltip { color: #433b31; font-size: 10px; }
.event-marker-icon { border: 0; background: transparent; }
.route-marker { display: grid; width: 27px; height: 27px; place-items: center; border: 1.5px solid #8d3c28; border-radius: 50%; color: #fffaf1; background: #9b452d; box-shadow: 0 1px 4px rgba(43,38,30,.3); font-family: Georgia, serif; font-size: 8px; font-weight: 700; }
.route-marker.is-current { border: 2px solid #8d3c28; color: #8d3c28; background: #f7f3ea; box-shadow: 0 0 0 4px rgba(155,69,45,.18), 0 1px 4px rgba(43,38,30,.3); }
.event-marker-icon:focus-visible { outline: 2px solid #9b452d; outline-offset: 2px; border-radius: 50%; }
.map-status { position: absolute; z-index: 700; top: 11px; left: 50%; max-width: calc(100% - 100px); margin: 0; padding: 7px 10px; transform: translateX(-50%); color: #7c3928; background: rgba(247,243,234,.95); box-shadow: 0 1px 4px rgba(43,38,30,.16); font-size: 10px; text-align: center; }
.map-compass i { display: block; width: 1px; height: 18px; background: linear-gradient(to bottom, var(--accent) 50%, #938b7b 50%); }
.map-compass { position: absolute; z-index: 500; top: 12px; right: 15px; display: flex; align-items: center; flex-direction: column; gap: 4px; padding: 4px 6px; color: #827b6e; background: rgba(247,243,234,.68); font-family: Georgia, serif; font-size: 9px; pointer-events: none; }
.map-scale-note { position: absolute; z-index: 500; right: 13px; bottom: 28px; padding: 3px 5px; color: #726b5e; background: rgba(247,243,234,.74); font-size: 8px; pointer-events: none; }
.map-error { display: grid; place-items: center; padding: 24px; color: #8f392d; font-size: 12px; text-align: center; }
.map-legend { display: flex; flex-wrap: wrap; gap: 11px 20px; padding: 2px 1px 0; color: #6f6a5e; font-size: 10px; }
.map-legend span { display: inline-flex; align-items: center; gap: 7px; }
.legend-range { width: 15px; height: 10px; border: 1px dashed var(--accent); background: rgba(155,69,45,.1); }
.legend-route { width: 20px; border-top: 1px dashed var(--accent); }
.legend-capital { width: 8px; height: 8px; border: 1.5px solid var(--accent); border-radius: 50%; background: var(--paper-light); }
.scope-caption { min-height: 31px; margin: 11px 0 0; color: #777163; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 11px; line-height: 1.65; }

.detail-column { display: flex; flex-direction: column; padding: 23px 24px 18px; }
.detail-topline { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: #8a8375; font-family: Georgia, serif; font-size: 11px; letter-spacing: .07em; }
.certainty { padding: 5px 7px; color: #705a43; background: rgba(177,145,103,.13); font-family: inherit; font-size: 9px; letter-spacing: .02em; }
.detail-period { margin: 27px 0 7px; color: var(--accent); font-size: 10px; font-weight: 650; letter-spacing: .08em; }
.detail-column h2 { margin: 0; font-family: "Songti SC", "Noto Serif CJK SC", "STSong", serif; font-size: 31px; font-weight: 500; line-height: 1.3; letter-spacing: -.04em; }
.event-mover { margin: 9px 0 18px; color: #766f62; font-size: 12px; }
.event-mover::before { content: "迁都者  /  "; color: #9a9283; }
.detail-column blockquote { margin: 0; padding: 0 0 0 13px; border-left: 2px solid #b78366; color: #514b40; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 14px; line-height: 1.8; }
.record-source { margin: 7px 0 0 15px; color: #928b7e; font-size: 9px; }
.detail-rule { height: 1px; margin: 18px 0 15px; background: var(--line); }
.detail-column h3 { margin: 0 0 8px; font-size: 11px; font-weight: 700; letter-spacing: .12em; }
.detail-copy { margin: 0; color: #666054; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 12px; line-height: 1.85; }
.location-box { margin-top: 14px; padding-top: 12px; border-top: 1px solid rgba(47,43,34,.10); }
.location-label { color: #928b7e; font-size: 9px; letter-spacing: .08em; }
.location-box > p { margin: 5px 0 7px; color: #4f4a40; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 12px; line-height: 1.6; }
.location-box ul { display: grid; gap: 5px; margin: 0; padding: 0; list-style: none; }
.location-box li { position: relative; padding-left: 11px; color: #777164; font-size: 10px; line-height: 1.55; }
.location-box li::before { content: ""; position: absolute; left: 0; top: .48em; width: 5px; height: 5px; border: 1px solid var(--accent); border-radius: 50%; }
.scope-mini { display: flex; gap: 9px; align-items: flex-start; margin-top: 14px; padding-top: 11px; border-top: 1px solid rgba(47,43,34,.10); }
.scope-mini-dot { flex: 0 0 auto; width: 12px; height: 12px; margin-top: 2px; border: 1px dashed var(--accent); background: rgba(155,69,45,.12); }
.scope-mini p { margin: 0; color: #70695d; font-size: 10px; line-height: 1.65; }
.scope-mini strong { display: block; color: #4e493f; font-size: 10px; font-weight: 650; }
.scope-mini p span { display: block; margin-top: 2px; }
.detail-nav { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: 18px; color: #898273; font-size: 10px; }
.nav-arrow { width: 34px; height: 32px; border: 1px solid var(--line); color: var(--ink); background: transparent; font: inherit; font-size: 17px; cursor: pointer; transition: background .15s ease, color .15s ease; }
.nav-arrow:hover:not(:disabled) { color: var(--paper-light); background: var(--ink); }
.nav-arrow:disabled { color: #b5afa3; cursor: default; }

.timeline-section { padding: 25px 0 25px; border-bottom: 1px solid var(--line); }
.timeline-heading-row { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 21px; }
.timeline-heading-row h2 { margin: 5px 0 0; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 22px; font-weight: 500; }
.timeline-heading-row > p { margin: 0; color: #898273; font-size: 10px; line-height: 1.6; text-align: right; }
.timeline-actions { display: flex; align-items: center; gap: 16px; }
.timeline-actions > p { margin: 0; color: #898273; font-size: 10px; line-height: 1.6; text-align: right; }
.play-timeline { min-height: 34px; padding: 0 11px; border: 1px solid rgba(155,69,45,.38); color: var(--accent); background: transparent; font: inherit; font-size: 10px; white-space: nowrap; cursor: pointer; }
.play-timeline:hover, .play-timeline[aria-pressed="true"] { color: var(--paper-light); background: var(--accent); }
.play-timeline:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.timeline-track { position: relative; display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 0; }
.timeline-track::before { content: ""; position: absolute; top: 9px; left: 8%; right: 8%; border-top: 1px solid rgba(155,69,45,.45); }
.timeline-item { position: relative; z-index: 1; display: grid; justify-items: start; gap: 5px; min-width: 0; padding: 0 5px; border: 0; color: #80796c; background: transparent; text-align: left; font-family: inherit; cursor: pointer; }
.timeline-dot { width: 18px; height: 18px; display: grid; place-items: center; border: 1px solid #a79d8c; border-radius: 50%; color: #746c5e; background: var(--paper); font-family: Georgia, serif; font-size: 8px; transition: .18s ease; }
.timeline-item strong { overflow: hidden; max-width: 100%; color: #625d52; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 13px; font-weight: 500; text-overflow: ellipsis; white-space: nowrap; }
.timeline-item small { overflow: hidden; max-width: 100%; color: #938c7f; font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
.timeline-item:hover .timeline-dot { border-color: var(--accent); }
.timeline-item[aria-current="step"] .timeline-dot { border-color: var(--accent); color: #fffaf1; background: var(--accent); box-shadow: 0 0 0 4px rgba(155,69,45,.12); }
.timeline-item[aria-current="step"] strong { color: var(--accent); }
.timeline-item:focus-visible, .nav-arrow:focus-visible, .header-back:focus-visible, .brand:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.reading-note { display: grid; grid-template-columns: 68px 1fr; gap: 20px; padding: 20px 0 24px; border-bottom: 1px solid var(--line); }
.note-index { color: var(--accent); font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 13px; line-height: 1.65; }
.reading-note p { margin: 0; color: #6c665a; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 12px; line-height: 1.9; }
.reading-note p + p { margin-top: 8px; color: #898273; font-size: 11px; }
.source-footer { display: grid; grid-template-columns: 165px 1fr; gap: 11px 24px; padding-top: 20px; }
.source-footer h2 { margin: 5px 0 0; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 19px; font-weight: 500; }
.source-footer ul { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 9px 24px; margin: 0; padding: 0; list-style: none; }
.source-footer li { color: #817a6d; font-size: 9px; line-height: 1.6; }
.source-publisher { color: #90897d; }
.source-footer li a { color: #5f594f; text-decoration-color: rgba(95,89,79,.35); text-underline-offset: 2px; }
.source-footer li a:hover { color: var(--accent); }
.data-credit { grid-column: 2; margin: 1px 0 0; color: #969083; font-size: 9px; line-height: 1.6; }
.footer-home { grid-column: 2; justify-self: start; margin-top: 5px; color: var(--accent); font-size: 10px; text-decoration: none; }
.map-error { padding: 25px; color: #8f392d; font-size: 12px; text-align: center; }
.record-source a { color: #71695c; text-decoration-color: rgba(113,105,92,.35); text-underline-offset: 2px; }
.record-source a:hover { color: var(--accent); }

@media (max-width: 960px) {
  .site-header, .page-shell { width: min(100% - 40px, 760px); }
  .atlas-layout { grid-template-columns: minmax(0,1.45fr) minmax(275px,.85fr); }
  .map-column { padding: 18px 15px 14px; }
  .detail-column { padding: 20px 17px 16px; }
  .detail-column h2 { font-size: 27px; }
  .map-legend { gap: 9px 13px; }
}
@media (max-width: 720px) {
  .site-header, .page-shell { width: calc(100% - 34px); }
  .site-header { padding-top: 15px; }
  .page-shell { padding-top: 28px; }
  .page-heading { align-items: flex-start; flex-direction: column; gap: 14px; margin-bottom: 20px; }
  .page-heading h1 { font-size: 35px; }
  .page-deck { max-width: 420px; font-size: 13px; }
  .date-note { display: flex; align-items: baseline; gap: 9px; max-width: none; padding-left: 9px; }
  .date-note span { font-size: 12px; white-space: nowrap; }
  .date-note small { margin: 0; font-size: 9px; }
  .atlas-layout { grid-template-columns: 1fr; }
  .map-column { padding: 17px 11px 12px; border-right: 0; }
  .map-heading h2 { font-size: 18px; }
  .map-period { font-size: 9px; }
  .map-frame { height: clamp(350px, 106vw, 440px); margin-top: 2px; }
  .map-legend { padding-left: 4px; font-size: 9px; }
  .scope-caption { padding: 0 4px; font-size: 10px; }
  .detail-column { padding: 18px 18px 16px; border-top: 1px solid var(--line); }
  .detail-period { margin-top: 19px; }
  .detail-column h2 { font-size: 28px; }
  .detail-copy { font-size: 12px; }
  .location-box li { font-size: 10px; }
  .detail-nav { margin-top: 10px; }
  .timeline-section { padding-top: 21px; }
  .timeline-actions { gap: 9px; }
  .play-timeline { min-height: 36px; padding: 0 8px; }
  .timeline-track { grid-template-columns: repeat(6, minmax(56px,1fr)); overflow-x: auto; padding: 2px 0 8px; scrollbar-width: thin; }
  .timeline-track::before { left: 26px; right: 26px; }
  .timeline-item { padding: 0 4px; }
  .timeline-item strong { font-size: 12px; }
  .timeline-item small { font-size: 8px; }
  .reading-note { grid-template-columns: 42px 1fr; gap: 12px; }
  .reading-note p { font-size: 11px; }
  .source-footer { grid-template-columns: 1fr; gap: 12px; }
  .source-footer ul { grid-template-columns: 1fr; gap: 8px; }
  .data-credit, .footer-home { grid-column: 1; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}