.fog {
  background: url('~@/assets/images/fog.png') center center repeat-x;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 280px;
  height: 175px;
  background-size: cover;
  z-index: 25;
  transition: all 1s ease;
	animation: move-fog 120s linear infinite;  
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
  will-change: transform;
}