.main > div:first-child,
.main_list {
  width: 1200px;
}
.main > div:first-child {
  position: absolute;
  top: 0;
}
.main_list {
  display: flex;
  flex-wrap: wrap;
}
.list_item {
  width: 392px;
  height: 356px;
  background: #cde6f7;
  position: relative;
  margin-right: 12px;
  margin-bottom: 60px;
  top: 0;
  transition: all 0.3s ease;
  cursor: pointer;
}
.list_item:nth-child(3n) {
  margin-right: 0;
}
.list_item:hover {
  top: -20px;
}
.list_item_title {
  padding:24px 38px 0;
}
.list_item_title span {
  display: block;
  width: 30px;
  height: 2px;
  background: #f19149;
  border-radius: 1px 1px 1px 1px;
  margin-bottom: 15px;
}
.list_item_title p {
  font-size: 18px;
  color: #394e69;
  line-height: 20px;
  height: 20px;
  overflow: hidden;
}
.list_item_content {
  width: 100%;
  height: 244px;
  position: absolute;
  bottom: 0;
  background: url("../image/white.png") no-repeat;
  padding: 37px 45px 0;
  box-sizing: border-box;
}
.list_item_content_details {
  color: #5b5b5b;
  height: 108px;
  line-height: 18px;
  margin-bottom: 32px;
  text-overflow: ellipsis;
  overflow: hidden;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 6;
  text-align: justify;
}
.list_item_btn {
  width: 154px;
  height: 42px;
  line-height: 42px;
  text-align: center;
  background-color: #186daa;
  color: #ffffff;
}
@media (max-width: 1220px) {
  .main > div:first-child,
  .main_list {
    width: 800px;
  }
  .list_item,
  .list_item:nth-child(3n) {
    margin-right: 16px;
  }
  .list_item:nth-child(even) {
    margin-right: 0;
  }
}
@media (max-width: 819px) {
  .main > div:first-child,
  .main_list,
  .list_item {
    width: 100%;
  }
  .list_item {
    margin-bottom: 30px;
    height: 320px;
  }
  .list_item:hover {
    top: 0;
  }
  .list_item,
  .list_item:nth-child(3n) {
    margin-right: 0;
  }
  .list_item_content_details {
    margin-bottom: 20px;
  }
}