/* Mobile photo scenes have no CSS keyframe animations: their entrance/wipe
   stays on the existing scroll clock. Let the browser retire distant drawing
   layers without changing pixels, source selection, layout or that clock.
   Do not apply to maps, their animated halos, or desktop CSS entrances:
   WebKit bug 301745 can freeze CSS animations inside skipped subtrees. */
@media(max-width:650px){.journey .photo-scene{content-visibility:auto}}