.on-this-day{padding:0 23px 18px}.on-this-day-heading{justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;display:flex}.on-this-day-heading h2{align-items:center;gap:7px;font-size:13px;font-weight:550;display:flex}.on-this-day-heading p{color:var(--muted);white-space:nowrap;font-size:10px}.on-this-day .gallery-grid{overscroll-behavior-x:contain;scrollbar-width:thin;gap:12px;padding:3px 3px 8px;display:flex;overflow-x:auto}.on-this-day .gallery-card{flex:0 0 114px}.on-this-day .gallery-card img{aspect-ratio:1.4}.on-this-day .gallery-card strong{margin-top:6px}@media (width<=760px){.on-this-day{padding:0 20px 12px}.on-this-day .gallery-card{flex-basis:104px}}.catalog-browse-controls{gap:12px;padding:0 23px 14px;display:grid}.catalog-filter-row{align-items:flex-end;gap:10px;display:flex}.catalog-filter-row>label{min-width:0;color:var(--muted);flex-direction:column;flex:1;gap:7px;font-size:12px;display:flex}.catalog-filter-row select{border:1px solid var(--line);background:var(--field);width:100%;min-height:44px;color:var(--ink);font:inherit;border-radius:7px;padding:0 10px;font-size:13px}.catalog-filter-toggle{display:none}.filter-results{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.filter-results .text-button{min-height:36px;font-size:12px}.photo-stepper{flex-shrink:0;align-items:center;gap:2px;display:flex}.photo-stepper>span{color:var(--muted);white-space:nowrap;text-align:center;min-width:32px;font-size:11px}.photo-stepper .icon-button{width:36px;height:40px}.viewer-mobile-nav{display:none}.on-this-day>summary{cursor:pointer;min-height:36px;list-style:none}.on-this-day>summary::-webkit-details-marker{display:none}.on-this-day>summary:after{content:"展开";color:var(--muted);font-size:11px}.on-this-day[open]>summary:after{content:"收起"}.cluster-picker-filter{border-bottom:1px solid var(--line);color:var(--muted);flex-shrink:0;align-items:center;gap:10px;padding:10px 14px;font-size:12px;display:flex}.cluster-picker-filter select{border:1px solid var(--line);background:var(--field);min-width:0;min-height:44px;color:var(--ink);font:inherit;border-radius:7px;flex:1;padding:6px 10px}@media (width<=760px){.viewer-app .app-header{flex-basis:60px;gap:10px;height:60px}.viewer-app .app-header>.button{display:none}.viewer-app .viewer-header-links{margin-left:auto}.viewer-app .viewer-mobile-nav{z-index:36;height:calc(68px + env(safe-area-inset-bottom));padding:8px 16px calc(8px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:var(--paper);box-sizing:border-box;justify-content:center;gap:8px;transition:opacity .24s,transform .24s;display:flex;position:absolute;bottom:0;left:0;right:0}.viewer-mobile-nav>button{max-width:210px;min-height:48px;color:var(--muted);font:inherit;background:0 0;border:0;border-radius:12px;flex:1;justify-content:center;align-items:center;gap:8px;font-size:14px;font-weight:550;display:flex}.viewer-mobile-nav>button.active{background:var(--active-surface);color:var(--ink)}.viewer-mobile-nav small{color:var(--muted);font-size:11px;font-weight:400}.viewer-mobile-nav>button:active{background:var(--active-surface)}.viewer-app[class*=immersive-] .viewer-mobile-nav{opacity:0;visibility:hidden;pointer-events:none;transition:opacity .24s,transform .24s,visibility 0s .24s;transform:translateY(12px)}.viewer-app .card-handle{height:24px}.viewer-app .photo-comparison.is-overlay .comparison-photo,.viewer-app .viewer-main.viewer-cards>.viewer-panel{padding-bottom:0}.viewer-app .panel-heading{padding:8px 16px 14px}.viewer-app .panel-heading .eyebrow{display:none}.viewer-app .panel-heading h1{font-size:18px}.viewer-app .panel-heading .icon-button{width:44px;height:44px}.viewer-app .catalog-browse-controls{gap:10px;padding:0 16px 12px}.viewer-app .catalog-filter-toggle{gap:7px;min-height:44px;font-size:13px;display:flex}.catalog-filter-toggle>span{background:var(--active-surface);border-radius:20px;padding:2px 6px;font-size:11px}.viewer-app .filters{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0 16px 12px}.viewer-app .filters .season-filter,.viewer-app .filters .time-filter,.viewer-app .filters .sort-filter{grid-column:auto}.viewer-app .filters select{min-height:44px;font-size:13px}.viewer-app .catalog-filter-row select,.viewer-app .filters select,.viewer-app .cluster-picker-filter select{font-size:16px}.viewer-app .filter-results{padding:0 16px 12px;font-size:12px}.viewer-app .gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 12px;padding:0 16px 20px}.viewer-app .gallery-card strong{margin-top:8px;font-size:13px}.viewer-app .gallery-card span{font-size:11px;line-height:1.5}.viewer-app .on-this-day{padding:0 16px 14px}.viewer-app .on-this-day .gallery-grid{padding:3px 3px 8px;display:flex}.viewer-app .on-this-day .gallery-card{flex-basis:120px}.viewer-app .comparison-photo{overscroll-behavior:contain;overflow-y:auto}.viewer-app .comparison-heading{gap:8px;min-height:52px;padding:8px 14px}.photo-context strong{font-size:14px}.photo-context>span{color:var(--muted);margin-top:4px;font-size:11px;display:block}.viewer-app .comparison-image{flex-shrink:0;min-height:120px;padding:10px}.viewer-app .comparison-information{flex-shrink:0;min-height:40px;max-height:55%}.viewer-app .comparison-information-toggle.button{min-height:36px;margin:4px 14px;padding:6px 10px;font-size:12px}.viewer-app .comparison-information-toggle>small{display:none}.viewer-app .comparison-information.is-open{min-height:230px}.viewer-app .comparison-actions{padding:6px 14px 8px}.viewer-app .photo-browse-actions{flex-wrap:wrap;gap:6px}.viewer-app .photo-browse-actions .button{min-height:40px;padding:8px 10px;font-size:12px}.viewer-app .photo-stepper .icon-button{width:40px;height:44px}.viewer-app .comparison-overlay-actions{padding:8px 14px 4px}.viewer-app .comparison-overlay-actions>.button{min-height:44px;font-size:13px}.viewer-app .comparison-overlay-actions .field-help{margin:3px 0;font-size:10px}.viewer-app .viewer-cards .map-tools .icon-button{width:44px;height:44px}.viewer-app .viewer-cards .photo-comparison.is-overlay .map-tools{max-height:calc(100% - var(--map-free-top,0%) - var(--map-free-bottom,0%) - 24px)}.viewer-app .map-tools{border-radius:12px}.viewer-app .map-level-switch{left:14px;right:auto;top:calc(var(--map-free-top,0%) + 56px);border-radius:10px;flex-direction:row;gap:4px;padding:4px}.viewer-app .map-level-switch>button{min-width:48px;min-height:44px;padding:6px 9px;font-size:12px}.viewer-app .map-caption{font-size:12px}.viewer-app .north-mark{height:36px}.viewer-app .map-caption small{font-size:9px}.viewer-app .map-help{font-size:10px}.viewer-app .photo-cluster-picker{bottom:calc(78px + env(safe-area-inset-bottom));border-radius:16px;max-height:min(62%,520px)}.viewer-app .viewer-main.panel-open .photo-cluster-picker{bottom:calc(78px + env(safe-area-inset-bottom));max-height:min(70%,540px)}.viewer-app .cluster-picker-heading{padding:12px 14px}.viewer-app .cluster-picker-heading .icon-button{width:44px;height:44px}.viewer-app .cluster-picker-grid{gap:18px 12px;padding:14px}.viewer-app .cluster-picker-photo strong{font-size:13px}.viewer-app .cluster-picker-photo span{font-size:11px}}@media (width<=360px){.viewer-app .photo-stepper{justify-content:center;width:100%}.viewer-app .comparison-image{min-height:130px}}@media (prefers-reduced-motion:reduce){.viewer-app .viewer-mobile-nav{transition:none}}