.main > div:first-child {
  width: 1200px;
  position: absolute;
  top: 0;
}
.main_content {
  width: 1200px;
}
.main_list {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
}
.main_item {
  width: 360px;
  height: 430px;
  background: url("../image/sense-bg.png");
  background-size: 100% 100%;
  margin-right: 60px;
  margin-bottom: 57px;
  position: relative;
  top: 0;
  padding: 80px 50px 25px;
  box-sizing: border-box;
  transition: all 0.3s ease;
}
.main_item:nth-child(3n) {
  margin-right: 0;
}
.main_item:hover {
  top: -20px;
}
.main_item i {
  position: absolute;
  width: 43px;
  height: 43px;
  top: 0px;
  left: 0px;
}
.main_item i img {
  width: 100%;
  height: 100%;
}
.main_item_title {
  height: 48px;
  font-size: 18px;
  line-height: 26px;
  width: 250px;
  font-weight: bold;
  margin-bottom: 39px;
  overflow: hidden;
  text-align: justify;
}
.main_item_content {
  font-size: 15px;
  line-height: 18px;
  height: 126px;
  display: -webkit-box;
  overflow: hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 7;
  -webkit-box-orient: vertical;
  margin-bottom: 63px;
}
.main_item_date {
  line-height: 13px;
  height: 13px;
  font-size: 13px;
  color: #186daa;
}
.main_item_img {
  position: absolute;
  bottom: 25px;
  right: 50px;
}
.identification {
  width: 1306px;
}
.supply,
.drain {
  padding: 70px 60px 90px;
  border: 1px solid #bbd3df;
  border-bottom: 5px solid #bbd3df;
  line-height: 51px;
}
.supply {
  clear: both;
  margin-bottom: 50px;
}
.supply_title {
  font-size: 37px;
  text-align: center;
  margin-bottom: 20px;
}
.supply_content span {
  display: inline-block;
  width: 1em;
}
.small_title {
  font-weight: bold;
  font-size: 22px;
  margin-bottom: 0;
}
.small_title i {
  display: inline-block;
  font-size: 33px;
}
.drain_content p span {
  display: inline-block;
  width: 2em;
}
@media (max-width: 1220px) {
  .main > div:first-child,
  .main_content {
    width: 800px;
  }
  .main_item {
    width: 385px;
  }
  .main_item,
  .main_item:nth-child(3n) {
    margin-right: 30px;
  }
  .main_item:nth-child(even) {
    margin-right: 0;
  }
  .identification {
    width: 800px;
  }
}
@media (max-width: 819px) {
  .main > div:first-child,
  .main_content,
  .identification {
    width: 100%;
  }
  .main_item {
    width: 100%;
    height: auto;
    margin-bottom: 20px;
    margin-right: 0;
    padding: 80px 40px 50px;
  }
  .main_item:nth-child(3n) {
    margin-right: 0;
  }
  .main_item_title {
    width: 100%;
    margin-bottom: 35px;
  }
  .main_item_content {
    margin-bottom: 45px;
    font-size: 16px;
    line-height: 22px;
    height: 154px;
  }
  .main_item:hover {
    top: 0;
  }
  .supply,
  .drain {
    padding: 30px 20px 40px;
    line-height: 25px;
  }
  .supply_title {
    font-size: 25px;
  }
  .small_title {
    margin-bottom: 10px;
  }
}