.atlas-stage{grid-template-columns:1fr}.map-panel{padding:22px}.river-legend{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin:17px 0 12px;font-size:13px}.river-legend>span{display:flex;align-items:center;gap:8px}.river-legend i{width:30px;height:0;border-top:4px solid;border-radius:3px}.river-legend .yangtze-key{border-color:#238da5}.river-legend .huanghe-key{border-color:#b58a29}.river-legend .map-legend-note{font-size:11px;color:#667768;margin-left:auto}.dated-map-scroll{overflow-x:auto;border-radius:16px;border:1px solid #d2dfd3;scrollbar-color:#95b4a5 #e8efe5;scrollbar-width:thin}.dated-geo-map{display:block;width:100%;min-width:720px;height:auto}.mapped-river{fill:none;stroke-width:4.1;stroke-linecap:round;stroke-linejoin:round}.river-yangtze{stroke:#238da5}.river-huanghe{stroke:#b58a29}.river-name{font-size:22px;font-weight:700;paint-order:stroke;stroke:#f2eddb;stroke-width:5px;stroke-linejoin:round;letter-spacing:3px}.huanghe-name{fill:#946b15}.yangtze-name{fill:#1d778f}.geo-caption{font-size:14px;fill:#667965}.geo-grid-label{font-size:12px;fill:#78959a}.dated-site{cursor:pointer;--site-color:#4b7564}.dated-site.era-0{--site-color:#9d6a36}.dated-site.era-1{--site-color:#27786f}.dated-site.era-2{--site-color:#786189}.site-leader{fill:none;stroke:#809187;stroke-width:1.2;stroke-dasharray:3 3}.site-marker{fill:var(--site-color);stroke:#fff;stroke-width:2.5}.site-marker.point-selected{fill:#be733b;stroke-width:3.5}.dated-site-card{fill:#fffcf2;fill-opacity:.97;stroke:#b9c9b8;stroke-width:1}.site-map-name{fill:#2e4b3d;font-size:18px;font-weight:700}.site-map-year{fill:#616c58;font-size:15px;font-weight:500}.dated-site.is-selected .dated-site-card{fill:#e2eddd;stroke:#4d8062;stroke-width:2.2}.dated-site.is-selected .site-map-name,.dated-site.is-selected .site-map-year{fill:#285c40}.dated-site:hover .dated-site-card,.dated-site:focus-within .dated-site-card{stroke:#24654d;stroke-width:2.4}.dated-site:focus{outline:none}.map-date-note{font-size:11px;color:#6a776c;margin:12px 0;line-height:1.8}.site-date-index{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:17px 0 6px}.site-date-index button{text-align:left;padding:11px 15px;background:#f6f7ed;border-color:#d2dcce;font-size:13px}.site-date-index span{display:block;font-weight:700}.site-date-index b{display:block;font-size:12px;font-weight:400;color:#74755e;margin-top:3px}.site-date-index button[aria-pressed=true]{background:#deebdb;border-color:#6b9476}.map-pan-hint{display:none;font-size:11px;color:#68776a;margin:7px 0}.arrival{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(230px,.8fr);gap:0 28px;align-items:start}.arrival>img,.arrival>.photo-kind,.arrival>.evidence-card{grid-column:2;grid-row:1/5}.arrival>.photo-kind{grid-row:5}.arrival>h3{grid-column:1;grid-row:5;margin:10px 0 16px}.arrival>.gold{grid-column:1;grid-row:6;width:auto;justify-self:start}.arrival>.tag,.arrival>h2,.arrival>.arrival-date,.arrival>.small{grid-column:1}.arrival-photo{height:205px}.arrival .evidence-card{min-height:180px;padding:18px 0}.map-credit{margin-top:13px}
@media(max-width:760px){.map-panel{padding:14px}.river-legend{gap:16px;font-size:12px}.river-legend .map-legend-note{margin-left:0;font-size:10px}.map-pan-hint{display:block}.site-date-index{grid-template-columns:repeat(2,1fr);gap:7px}.site-date-index button{padding:10px;font-size:12px}.site-date-index b{font-size:11px}.arrival{display:flex;gap:0}.arrival>.gold{width:100%}.arrival-photo{height:190px}.dated-map-scroll{margin-left:-3px;margin-right:-3px}.map-date-note{font-size:10px}.map-panel .row{align-items:flex-start}.map-panel .row .small{font-size:10px}}
/* Chronological green scale, shared by map labels and the ordered index. */
.age-legend{margin:20px 0 10px;padding:16px 18px;border:1px solid #cad8c8;border-radius:10px;background:#f3f6ec}.age-legend>div:first-child{display:flex;justify-content:space-between;gap:15px;font-size:13px;color:#214b3c}.age-legend>div:first-child>span{font-size:11px;color:#5c7564}.age-spectrum{display:flex;height:12px;margin:12px 0 7px;border-radius:5px;overflow:hidden}.age-spectrum i{flex:1}.age-ends{display:flex;justify-content:space-between;font-size:11px;color:#49634f}.age-legend p{font-size:10px;color:#647c68;line-height:1.6;margin:9px 0 0}.dated-site .dated-site-card{fill:var(--age-color);fill-opacity:1;stroke:#ecf2e5;stroke-width:1.3}.dated-site .site-map-name,.dated-site .site-map-year,.dated-site.is-selected .site-map-name,.dated-site.is-selected .site-map-year{fill:var(--age-ink)}.dated-site .site-marker,.dated-site .site-marker.point-selected{fill:var(--age-color)}.dated-site .site-marker.point-selected{stroke:#d6a34a;stroke-width:4}.dated-site.is-selected .dated-site-card{fill:var(--age-color);stroke:#c99c41;stroke-width:3}.dated-site:hover .dated-site-card,.dated-site:focus-within .dated-site-card{stroke:#b4862d;stroke-width:3}.site-date-index button{background:var(--age-color);color:var(--age-ink);border:2px solid transparent}.site-date-index b{color:var(--age-ink);opacity:.9}.site-date-index button[aria-pressed=true]{background:var(--age-color);border-color:#bf8f31;box-shadow:0 0 0 1px #bf8f31}.site-date-index button:hover,.site-date-index button:focus-visible{border-color:#c49d4b}

/* Era selection lights up all corresponding sites while retaining the age scale. */
.era-map-status{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:#183f33;color:#f7f2de;border-radius:10px;padding:13px 16px;margin-top:16px;font-size:13px}.era-map-status>span:last-child{font-size:12px;color:#d5e6ca}.era-beacon{width:9px;height:9px;background:#f1ce79;border-radius:50%;box-shadow:0 0 0 4px #f1ce791b}.dated-site{transition:opacity .25s}.dated-site.era-dim{opacity:.58}.dated-site.era-dim:hover,.dated-site.era-dim:focus-within{opacity:1}.dated-site.era-lit .dated-site-card{stroke:#c39537;stroke-width:2.5}.dated-site.era-lit .site-marker{stroke:#f9d87a;stroke-width:3.5;filter:drop-shadow(0 0 4px #e9c773)}.dated-site.era-lit .site-leader{stroke:#93722f;stroke-width:1.8}.dated-site.is-selected .dated-site-card{stroke:#f2c55f;stroke-width:4}.site-date-index button.era-dim{opacity:.65}.site-date-index button.era-lit{border-color:#c49d4b;box-shadow:0 0 0 1px #c49d4b}.site-date-index button:hover,.site-date-index button:focus-visible{opacity:1}.site-date-index span{display:flex;justify-content:space-between;gap:5px}.site-date-index span small{font-size:10px;font-weight:400}.station-rail button{border-color:#bd9c55}.era-line button[aria-pressed=true]{box-shadow:0 0 0 2px #cba753}

.site-leader{pointer-events:none}.site-point,.site-label{cursor:pointer}.site-point:focus,.site-label:focus{outline:none}.site-point:focus .site-marker{stroke:#eeaf29;stroke-width:5}