@media screen and (max-width: 640px) and (min-width: 0px) {
  .index_proList_img img {
    left: 0px;
  }

  .index_proList_txt {
    width: 100%;
  }

  .index_proList_nav {
    width: 50%;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }

  .index_proListBigBox .index_title {
    top: -240px;
  }

  .index_proList_img {
    position: relative;
    top: -260px;
  }

  .index_proList_nav {
    top: 200px;
  }

  .index_prolist {
    position: relative;
    top: -100px;
  }

  .index_product_NavList img {
    width: 100px;
  }

  .appBox {
    display: flex;
    flex-wrap: wrap;
  }

  .appList {
    width: 50%;
  }

  .index_proList_txt {
    width: 95%;
  }

  .box3 {
    padding-top: 60px;
  }
}

@media screen and (max-width: 450px) and (min-width: 0px) {
  .box2 {
    background: url(https://ss-res.oss-cn-hangzhou.aliyuncs.com/site_res/61/20221008171712_JlzeWLRD.jpg) center no-repeat;
    background-size: 100% 100%;
    position: relative;
  }

  .index_proList_img {
    display: none;
  }

  .index_proList_nav {
    width: 100%;
    position: absolute;
  }

  .index_proListBigBox .index_title {
    top: 30px;
  }

  .index_proListBigBox {
    position: relative;
  }

  .index_proList_txt {
    position: relative;
  }

  .index_product_NavList {
    width: 20%;
  }

  .index_product_NavList a {
    display: none;
  }

  .index_proListBigBox .index_prolistbox {
    margin-top: 230px;
  }

  .index_product_NavList img {
    width: 100%;
  }
}