.common_container {
  width: 1200px;
  height: 891px;
  background: rgba(255, 255, 255, 1);
  box-shadow: 0px 3px 20px rgba(64, 158, 254, 0.16);
  border-radius: 4px;
  margin: 0 auto;
}
.common_header {
  height: 40px;
  background: rgba(103, 166, 230, 1);
  opacity: 1;
  border-radius: 4px 4px 0px 0px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  line-height: 40px;
  color: rgba(255, 255, 255, 1);
  text-align: center;
}
.common_left {
  width: 174px;
  height: 851px;
  background: rgba(255, 255, 255, 1);
  box-shadow: 0px 3px 6px rgba(64, 158, 254, 0.16);
  opacity: 1;
  border-radius: 4px;
  float: left;
  display: flex;
}
.common_left .img_item_b {
  display: none;
}
.common_active {
  background-color: rgba(244, 248, 251, 1);
  color: #409efe !important;
}
.common_active .img_item_a {
  display: none;
}
.common_active .img_item_b {
  display: block !important;
}
.common_left li a {
  width: 174px;
  height: 87px;
  opacity: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}
.common_left li a {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  font-size: 14px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: rgba(187, 209, 226, 1);
}
.common_left img {
  vertical-align: middle;
}
.common_left span {
  margin-top: 10px;
}