.gallery {
  height: 50%;
}
.swiper-container {
  margin-left: auto;
  margin-right: auto;
}
.swiper-slide {
  background-size: cover;
  background-position: center;
}
.gallery-top {
  width: 820px;
  height: 615px;
}
.gallery-thumbs {
  width: 820px;
  height: 75px;
  box-sizing: border-box;
  padding: 10px 0;
}
.gallery-thumbs .swiper-slide {
  width: 75px;
  height: 75px;
  opacity: 0.8;
}
.gallery-thumbs .swiper-slide-active {
  opacity: 1;
}