.content_header > div {
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
.example_content {
  margin-top:88px;
  margin-bottom:54px;
  display: flex;
  /* justify-content: space-between; */
  flex-wrap: wrap;
}
.example_content > div:nth-child(3n) {
  margin-right: 0;
}
.example_content_item {
  margin-right: 32px;
  margin-bottom: 32px;
  position: relative;
  width: calc((100% - 64px) / 3);
  overflow: hidden;
}
.item_img {
  display: flex;
  position: relative;
}

.item_img > img {
  width: 100%;
  transition: all 0.5s ease;
}
.showBox {
  width: 60%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.5s ease;
}


.cover {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  /*background-color: #d7000f;*/
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 0;
  transition: all 0.3s linear;
}
.cover > div {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.cover span {
  display: block;
  width: 100%;
  height: 1px;
  background-color: #ffffff;
  transition: all 0.5s ease;
}
.cover a {
  font-size: 24px;
  font-family: PingFang SC-Regular, PingFang SC;
  font-weight: 400;
  color: #ffffff;
  line-height: 28px;
  margin: 6px 0;
}
.example_content_item:hover .item_img > img {
  transform: scale(1.1);
}
.example_content_item:hover .cover {
  z-index: 1;
  background-color: #d7000f;
}
.example_content_item:hover .showBox > span {
  width: 16px;
}
@media only screen and (max-width: 767px) {
  .example_content_item {
    margin-right: 0;
    margin-bottom: 32px;
    position: relative;
    width: 100%;
    overflow: hidden;
    box-shadow: 0 3px 13px rgba(0,0,0,0.08);
}
}