.nav {
  height: 44px;
  line-height: 44px;
  border-bottom: 1px solid #d8d8d8;
  text-align: center;
  font-size: 18px;
}

.back {
  float: left;
  color: #3688ff
}

.details_top img {
  box-shadow: 0 0.04rem 0.1rem rgba(0, 0, 0, .2);
  width: 105px;
}

.details_top_left_top h3 {
  font-size: 18px;
  font-weight: normal;
}

.cate {
  background: #efeff4;
  color: #8a8a8f;
  margin-right: 10px;
  border-radius: 10px;
  padding: 3px 10px;
  font-size: 12px;
}