.cases{
  display: flex;
  justify-content: space-around;
}
.case-box{
  overflow: hidden;
  position: relative;
  flex: 0 0 453px;
  height: 442px;
  padding: 22px 30px 0 30px;
  margin-bottom: 40px;
}
.case-publish-time{
  font-size: 20px;
  font-weight: 700;
  color: rgba(36, 38, 43, 1);
  text-align: right;
  border-bottom: 0.87px solid var(--main-color-light);
  padding-bottom: 10px;
  z-index: 2;
  position: relative;
}
.case-title {
  font-size: 16px;
  font-weight: 400;
  color: rgba(36, 38, 43, 1);
  margin: 10px 0;
  z-index: 2;
  position: relative;
}

.case-description {
  font-size: 14px;
  font-weight: 400;
  color: rgba(102, 107, 122, 1);
  margin: 10px 0 18px 0;
  z-index: 2;
  position: relative;
}

.case-img {
  width: 100%;
  height: 277.62px;
  object-fit: cover;
  z-index: 2;
  position: relative;
}

.active-bg{
  width: 100%;
  position: absolute;
  top: 100%;
  height: 311px;
  background: var(--main-color-lighter);
  z-index: 1;
  left: 0;
  /*transition: top 0.5s;*/
}

.case-box:hover .active-bg{
  top: 0;
}