.pan-banner { 
  --height: 320px;
  --pan-duration: 40s;
  --oversize: 110%;
  position: relative;
  height: var(--height);
  overflow: hidden;
  background-image: url("/img/votingmain-full.webp");
  background-repeat: no-repeat;
  background-position: 100% 50%;
  background-size: var(--oversize) auto;
  animation: pan-left var(--pan-duration) linear forwards;
}