.works-mainvisual-slider{
  width: 100vw;
  height: 85vh;
  display: flex;
  justify-content: center;
  position: relative;
}
.works-mainvisual-slider img{
  width: 89vw;
  height: 85vh;
  object-fit: cover;
  position: absolute;
  opacity: 0;
  animation: image-switch-animation 20s infinite;
}
@keyframes image-switch-animation {
  0%{ opacity: 0;}
  15%{ opacity: 1;}
  25%{ opacity: 1;}
  40%{ opacity: 0;}
  100%{ opacity: 0;}
}
.works-mainvisual-slider img:nth-of-type(1) {
  animation-delay: 0s;
}
.works-mainvisual-slider img:nth-of-type(2) {
  animation-delay: 5s;
}
.works-mainvisual-slider img:nth-of-type(3) {
  animation-delay: 10s;
}
.works-mainvisual-slider img:nth-of-type(4) {
  animation-delay: 15s;
}

.works-img video{
  width: 89vw;
  height: 85vh;
  object-fit: cover;
  margin-top: 0px;
}