#tab_box{
  width: 100%;
}
#box {
  width: 1000px;
  margin: 0 auto;
}

.tab ul {
  height: 60px;
  line-height: 60px;
  padding: 0;
  margin: 0 auto;
  width: 400px;
}

.tab li {
  display: block;
  text-align: center;
  width: 100px;
  float: left;
  list-style: none;
  cursor: pointer;
  height: 30px;
  line-height: 30px;
}
.tab li:first-child{
  margin-right: 100px;
}
.tab_img {
  width: 20%;
  margin: 20px 20px;
  background-color: #ccc;
}

.tab_img .img {
  width: 100%;
  height: auto;
}

.choice {
  display: inline-block;
  width: auto!important;
  font-size: 30px;
  color: #63686c;
  padding-bottom: 17px;
  cursor: pointer;
 
}
.actives {
  display: inline-block;
  width: auto!important;
  font-size: 30px;
  color: #63686c;
  padding-bottom: 17px;
  cursor: pointer;
  /*color: #1273eb;
  border-bottom: 2px solid #1273eb;*/
  color: #118581;
  border-bottom: 2px solid #118581;
}
.tab_box{
}
.tab-item {
  display: none;
}

.show {
  display: block;
  display: flex;
  /* justify-content: space-between; */
  display: -webkit-flex;
  flex-direction: row;
  flex-wrap: wrap;

}