.vue-waterfall {
  width: 100%;
  overflow-y: auto;
  position: relative;
}
.vue-waterfall .slot-box {
  position: absolute;
  top: 100%;
  left: 100%;
  width: 0;
  height: 0;
  overflow: hidden;
}
.vue-waterfall .vue-waterfall-column {
  float: left;
}
.vue-waterfall.is-transition img {
  opacity: 0;
}
.vue-waterfall.is-transition img.animation {
  animation: 0.4s lazy-animation linear;
  animation-fill-mode: forwards;
}
@keyframes lazy-animation {
from {
    opacity: 0;
}
to {
    opacity: 1;
}
}