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@media(max-width:480px){.app-header{gap:10px}.brand small{max-width:173px}.chapter strong{font-size:14px}.chapter>span{display:none}#source-open{font-size:0}#source-open:after{content:'资料 ↗';font-size:10px}.map-panel{height:565px}.map-toolbar{left:12px;right:50px;top:12px;gap:5px}.place-search input{width:113px;font-size:11px}.place-search button{padding:0 6px}.segmented button{padding:5px 8px}.tool-button{font-size:10px;padding:6px 8px}.map-status{top:105px;left:15px}.map-status strong{font-size:22px}.map-status #map-event{max-width:210px;font-size:10px}.zoom-tools{top:12px;right:11px}.lens-summary{left:12px;bottom:78px;width:calc(100% - 24px);max-width:none;padding:9px 11px}.lens-summary strong{font-size:14px;display:inline;margin-left:7px}.lens-summary p{font-size:9px;line-height:1.7}.lens-summary .evidence-note{font-size:8px;margin-top:5px;padding-top:4px}.lens-summary .lens-kicker{font-size:8px}.army-roster{right:12px;bottom:220px;max-width:170px;padding:8px 10px}.army-roster summary{font-size:9px}.map-foot{bottom:14px;left:14px;right:14px}.legend{gap:9px;font-size:8px}.map-foot p{font-size:8px}.map-selection{top:142px;right:15px;max-height:55%;width:250px}.layer-menu{left:110px;top:96px}.timeline-actions .period-label{display:none}.timeline-marks{grid-template-columns:repeat(4,minmax(0,1fr));row-gap:2px}.timeline-marks button:nth-child(n+5){display:none}.timeline-marks button{font-size:9px}.timeline-caption span:first-child{display:none}.timeline-heading #timeline-current-title{display:block;font-size:9px}.timeline-panel{min-height:142px}.event-search{font-size:14px}.catalog-item{gap:9px}.catalog-item time{width:75px;font-size:9px}.catalog-item strong{font-size:12px}.catalog-item>span{display:none}dialog{padding:20px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

@media(min-width:601px) and (max-width:1000px){.workspace{display:grid;grid-template-columns:290px minmax(0,1fr);height:calc(100dvh - 240px);min-height:580px}.app-header{padding:0 17px;gap:16px}.brand{min-width:255px;font-size:23px}.brand small{font-size:8px}.chapter strong{font-size:15px}.chapter small{display:none}#source-open{font-size:10px}#story{padding:8px 15px 25px}.story-navigation{padding-left:15px;padding-right:15px}.story-title{font-size:24px}.story-tabs{gap:16px}.story-tabs button{font-size:11px}.causal-card{padding:11px 10px}.step-body{margin-left:0;font-size:12px}.step-title{font-size:14px}.step-badge{font-size:8px}.map-toolbar{left:10px;right:49px;top:12px;gap:5px}.place-search input{width:113px}.segmented button{padding:5px 7px}.tool-button{font-size:10px;padding:6px 8px}.map-status{top:145px;left:13px}.map-status strong{font-size:21px}.map-status #map-event{font-size:10px;max-width:200px}.zoom-tools{right:10px;top:12px}.lens-summary{left:11px;bottom:84px;width:calc(100% - 22px);max-width:none;padding:10px 11px}.lens-summary strong{font-size:14px}.lens-summary p{font-size:9px}.lens-summary .evidence-note{font-size:8px}.army-roster{bottom:228px;right:11px;max-width:168px}.map-foot{left:12px;right:12px;bottom:15px}.map-foot p{font-size:8px}.legend{font-size:8px;gap:8px}.map-tip{display:none}.map-selection{top:142px;right:10px;width:min(260px,calc(100% - 20px));max-height:54%}.layer-menu{top:94px;left:70px}.timeline-heading>div:first-child{display:block}#timeline-current{font-size:16px}.period-label{font-size:0}.period-label select{font-size:10px;max-width:130px}.speed-label{display:none}.timeline-actions{gap:8px}.timeline-marks button{font-size:9px}.timeline-marks button time{font-size:8px}}

@media(min-width:601px) and (max-width:1000px){.map-status{top:58px;left:auto;right:55px;max-width:145px}.map-status>div{display:none}.follow-toggle{margin:0;font-size:9px}}
@media(min-width:601px) and (max-width:1000px){.army-roster:has(details:not([open])){top:100px;bottom:auto}}

/* Quiet physical labels: the historical overlay keeps visual priority. */
svg .terrain-labels{pointer-events:none;user-select:none}
svg .terrain-label{font:12px var(--serif);fill:#696950;paint-order:stroke;stroke:#edeadb;stroke-width:3px;stroke-linejoin:round}
svg .terrain-label.range{letter-spacing:2px}
svg .terrain-label.landform{font-size:11px;letter-spacing:1px;fill:#6b7056}
svg .terrain-label.water{font:italic 11px var(--serif);fill:#486f79;stroke:#e7eadd;stroke-width:3px;letter-spacing:1px}
svg .terrain-label.peak{font:11px var(--sans);fill:#68644c;stroke-width:3px}
svg .terrain-elevation{font:10px var(--sans);font-variant-numeric:tabular-nums;fill:#68644c;paint-order:stroke;stroke:#edeadb;stroke-width:3px}
svg .summit-symbol{fill:none;stroke:#7c795f;stroke-width:1.1;stroke-linejoin:round}

/* The physical surface uses actual elevation, with the atlas's mineral palette. */
svg .relief-surface,svg .relief-image{pointer-events:none}
svg .relief-border{fill:none;stroke:#89977b;stroke-width:.7;stroke-opacity:.66;vector-effect:non-scaling-stroke;pointer-events:none}
.elevation-key{display:flex;align-items:flex-start;gap:8px;max-width:290px;margin:0 0 7px;color:#53644f;font-size:8px;line-height:1.35}
.elevation-key>span{white-space:nowrap}.elevation-key>div{width:208px;max-width:calc(100% - 45px)}
.elevation-key i{display:block;height:6px;border-radius:1px;background:linear-gradient(90deg,#cfdcc0 0%,#dae0c0 2.67%,#e2dec0 6.67%,#dfd2ad 13.33%,#d5c197 26.67%,#c7ad8c 40%,#bfa286 53.33%,#d3c7b2 66.67%,#e7e1d4 80%,#f5f2e8 100%)}
.elevation-ticks{display:flex;justify-content:space-between;font-size:7px;margin-top:3px;font-variant-numeric:tabular-nums}
.map-foot:has(.elevation-key:not([hidden])){bottom:16px}
.lens-summary{bottom:98px}.army-roster{bottom:83px}
svg .place-label{fill:#425b47;stroke:#f0efdf;stroke-opacity:.94}
svg .region-label{fill:#586c51;stroke:#ede9d9;stroke-width:3px;stroke-opacity:.85}
svg .terrain-label,svg .terrain-elevation{stroke:#eee9d8;stroke-opacity:.9}
svg .river{stroke:#86aeb5;opacity:.85}svg .river.highlight{stroke:#497f95;opacity:1}
@media(min-width:601px) and (max-width:1000px){.lens-summary{bottom:112px}.army-roster{bottom:256px}.elevation-key>div{width:210px}}
@media(max-width:600px){.lens-summary{bottom:102px}.army-roster{bottom:102px}}
@media(max-width:480px){.lens-summary{bottom:108px}.army-roster{bottom:250px}.elevation-key{margin-bottom:6px}.elevation-key>div{width:215px}}

.elevation-ticks{position:relative;height:11px;display:block}.elevation-ticks span{position:absolute;transform:translateX(-50%)}.elevation-ticks span:nth-child(1){left:0;transform:none}.elevation-ticks span:nth-child(2){left:13.33%}.elevation-ticks span:nth-child(3){left:40%}.elevation-ticks span:nth-child(4){left:66.67%}.elevation-ticks span:nth-child(5){right:0;transform:none}

/* Reading and map retain their own place on phones. */
.mobile-reading-nav,.step-map-link,.timeline-more-open{display:none}
.stepper{gap:2px}.stepper button{position:relative;width:44px;height:44px;min-width:44px;padding:0;border:0;border-radius:0;line-height:44px;background:none}
.stepper button:before{content:'';position:absolute;inset:9px;border:1px solid var(--line);border-radius:50%;pointer-events:none}
.zoom-tools button{width:44px;height:44px;line-height:40px}.map-toolbar{right:75px}
.timeline-more{position:fixed;inset:auto 14px 164px auto;margin:0;width:min(310px,calc(100vw - 28px));max-height:calc(100dvh - 200px);overflow:auto;padding:15px 17px;background:var(--white);color:var(--ink);border:1px solid var(--line);border-radius:7px;box-shadow:0 9px 28px #24483624}
.timeline-more::backdrop{background:transparent}.more-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.more-head strong{font:500 18px var(--serif)}.more-head button{min-width:52px;min-height:44px;border:1px solid var(--line);border-radius:4px;background:var(--paper);font-size:12px}
#mobile-time-options{display:grid;gap:14px}#mobile-time-options label{display:grid;gap:6px;color:var(--ink);font-size:12px}#mobile-time-options select{width:100%;max-width:none;min-height:44px;font-size:13px;padding:7px 10px;background:var(--white);border:1px solid #bfcab8;border-radius:4px}
@media(min-width:601px) and (max-width:1000px){.map-toolbar{right:65px}.map-status{right:65px}}
@media(max-width:600px){
  .mobile-reading-nav{position:sticky;top:0;z-index:14;display:flex;gap:8px;padding:7px 16px;background:var(--white);border-bottom:1px solid var(--line);height:66px}
  .mobile-reading-nav button{display:flex;flex:1;flex-direction:column;justify-content:center;align-items:center;gap:1px;min-width:0;min-height:50px;padding:4px 9px;border:1px solid var(--line);border-radius:4px;background:var(--white);color:var(--green);font-size:13px;line-height:1.5}
  .mobile-reading-nav button small{display:block;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:9px;color:#64765e}
  .mobile-reading-nav button[aria-pressed=true]{background:#edf2e7;border-color:#a9bba1;color:var(--green)}
  .workspace{display:block;height:auto;min-height:0}.story-panel{border:0}.map-panel{display:none}
  body[data-mobile-view=map] .story-panel{display:none}body[data-mobile-view=map] .map-panel{display:block;height:calc(100dvh - 295px);min-height:430px}
  .story-navigation{padding:7px 16px 3px}.story-navigation .text-button{min-height:44px;font-size:11px}
  #story{padding-top:9px}.story-tabs button{min-height:44px}.anchor-chips button{min-height:44px;padding:7px 10px;font-size:11px}
  .causal-card{margin-bottom:9px}.causal-card[aria-pressed=true]{margin-bottom:0;border-bottom-left-radius:0;border-bottom-right-radius:0}
  .causal-card[aria-pressed=true]+.step-map-link{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;min-height:44px;padding:8px 13px;margin:0 0 9px;border:1px solid #bdcdb8;border-top:0;border-radius:0 0 3px 3px;background:#edf2e7;color:var(--green);font-size:12px;text-align:left}
  .causal-card[aria-pressed=true]+.step-map-link:hover{background:#e4ecd9}
  .map-toolbar{left:12px;right:67px;top:12px;gap:5px}.map-toolbar .segmented{flex-shrink:0}.map-toolbar .segmented button{min-width:44px;min-height:38px;padding:4px 7px}
  .map-toolbar .tool-button{min-height:44px;padding:7px 10px;font-size:11px}.place-search{flex:1;min-width:120px;max-width:170px}.place-search input{flex:1;min-width:0;width:70px;min-height:44px;padding:8px;font-size:11px}.place-search button{min-width:44px;min-height:44px;padding:0;font-size:20px}
  .zoom-tools{right:11px;top:12px}.map-status{top:118px;left:15px;max-width:calc(100% - 90px)}.map-status strong{font-size:21px}.follow-toggle{min-height:32px;margin-top:0}
  .layer-menu{top:107px;left:12px;max-width:calc(100% - 78px);max-height:calc(100% - 120px);overflow:auto;padding:10px 14px}.layer-menu label{min-height:38px;margin-top:2px;font-size:12px}
  .map-selection{top:155px;right:12px;max-height:50%}.map-selection>button,.dialog-close{min-width:44px;min-height:44px}
  .timeline-panel{min-height:160px;padding:8px 16px max(8px,env(safe-area-inset-bottom));position:sticky;bottom:0}.timeline-heading{gap:7px;min-height:44px}.timeline-heading>div:first-child{min-width:0;flex:1}.timeline-heading #timeline-current{font-size:15px;white-space:nowrap}.timeline-heading #timeline-current-title{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:9px}
  .timeline-actions{gap:7px}.play-button{min-height:44px;min-width:66px;padding:7px 9px}.timeline-more-open{display:block;min-width:44px;min-height:44px;padding:6px 7px;border:1px solid var(--line);border-radius:4px;background:var(--white);font-size:11px}
  #timeline-period-slot,#timeline-speed-slot{display:none}.time-slider{height:24px;margin-top:5px}.timeline-marks{grid-template-columns:repeat(4,minmax(0,1fr));gap:3px;margin-top:0}.timeline-marks button{min-height:44px;font-size:9px;padding:3px 4px}.timeline-marks button time{font-size:8px}.timeline-caption{margin-top:1px}.timeline-caption span:first-child{display:none}
  #mobile-time-options .period-label,#mobile-time-options .speed-label{display:grid;font-size:12px}
}

@media(max-width:1000px){#timeline-period-slot,#timeline-speed-slot{display:none}.timeline-more-open{display:block;min-width:44px;min-height:44px;padding:6px 7px;border:1px solid var(--line);border-radius:4px;background:var(--white);font-size:11px}}
@media(max-width:600px){.map-status{top:65px;left:auto;right:70px;max-width:190px}.map-status>div{display:none}.follow-toggle{font-size:10px}}

/* Nationwide chronology keeps the established atlas's reading hierarchy. */
.catalog-filters{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:10px;margin:13px 0 8px}.catalog-filters label{display:grid;gap:5px;font-size:10px;color:#586c51}.catalog-filters select{width:100%;min-height:38px;min-width:0;padding:6px 8px;border:1px solid #c4cfbc;background:var(--white);border-radius:4px;font-size:11px}.catalog-scope{font-size:10px;line-height:1.6;color:#63745c;margin:6px 0 10px}.catalog-item strong small{display:block;font-size:10px;color:var(--muted);font-weight:400;margin-top:2px}.catalog-item time{line-height:1.5}
.polity-availability{font-size:10px;line-height:1.65;color:#68765f;max-width:220px;margin:5px 0 10px}.layer-menu label:has(input:disabled){color:#8a9383}
svg .historical-polity{fill:#818d62;fill-opacity:.12;stroke:#62754d;stroke-width:1;stroke-opacity:.65;stroke-dasharray:5 4;vector-effect:non-scaling-stroke;pointer-events:none}
svg .lake{fill:#ccdedc;stroke:#8caeb0;stroke-width:.5;vector-effect:non-scaling-stroke;pointer-events:none}
.map-status strong{font-size:20px}.photo img{object-fit:contain;max-height:240px;background:#f0eee3;filter:none}.photo figcaption{line-height:1.75}.period-label select{max-width:170px}.timeline-heading>div:first-child{min-width:0}.timeline-heading #timeline-current{white-space:nowrap}#timeline-current-title{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:290px}
@media(max-width:600px){.catalog-filters{grid-template-columns:1fr 1fr}.catalog-filters label:first-child{grid-column:1/-1}.catalog-filters select{min-height:44px;font-size:12px}.catalog-item time{width:90px}.catalog-item strong small{font-size:10px}.map-toolbar .segmented button{font-size:10px;padding:4px 5px;min-width:40px}.map-toolbar .segmented button#view-event{min-width:64px}.place-search{min-width:108px}.place-search input{width:56px}.layer-menu{max-width:calc(100% - 75px)}.timeline-heading #timeline-current{font-size:13px}#timeline-current-title{max-width:175px}}