@media screen and (max-width: 996px) {
  .index_ser_mob {
    display: flex;
    padding: 40px 40px 10px;
    flex-wrap: wrap;
  }
  .index_ser_mob .list {
    width: calc((100% - 30px)/2);
    position: relative;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.07);
    margin-left: 30px;
    margin-bottom: 30px;
  }
  .index_ser_mob .list .center {
    width: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    transform: translate(-50%, -50%);
  }
  .index_ser_mob .list .center .img {
    text-align: center;
  }
  .index_ser_mob .list .center .tit {
    font-size: 24px;
    color: #000;
    text-align: center;
    font-weight: bold;
    margin-top: 38px;
  }
  .index_ser_mob .list:nth-child(odd) {
    margin-left: 0;
  }
  .mob_experience .tab {
    height: auto;
    background: none;
  }
  .mob_experience .tab .nav {
    display: flex;
    flex-wrap: wrap;
    box-sizing: border-box;
  }
  .mob_experience .tab .nav a {
    box-sizing: border-box;
    display: block;
    width: calc((100% - 52px) / 3);
    text-align: center;
    color: #666;
    line-height: 60px;
    border: 1px solid #666666;
    margin-bottom: 24px;
    margin-right: 26px;
  }
  .mob_experience .tab .nav a:nth-child(4){
      width: 35%;
  }
  .mob_experience .tab .nav a:nth-child(3n+3) {
    margin-right: 0;
  }
  .mob_experience .tab .nav .on {
    background: #004add;
    color: #fff;
    border-color: #004add;
  }
}
@media screen and (max-width: 500px) {
  .index_ser_mob .list .center .img img {
    width: 50px;
  }
  .index_ser_mob .list .center .tit {
    font-size: 16px;
    margin-top: 20px;
  }
  .mob_experience .tab .nav a {
    line-height: 40px;
    font-size: 14px;
  }
}
@media screen and (max-width: 414px) {
  .index_ser_mob {
    padding: 20px 20px 5px;
  }
  .index_ser_mob .list {
    width: calc((100% - 15px)/2);
    margin-left: 15px;
    margin-bottom: 15px;
  }
  .index_ser_mob .list .center .img img {
    width: 50px;
  }
  .index_ser_mob .list .center .tit {
    font-size: 16px;
    margin-top: 20px;
  }
  .mob_experience .tab .nav a {
    width: calc((100% - 30px)/3);
    line-height: 30px;
    margin-right: 15px;
    margin-bottom: 15px;
  }
}