.topBg{background:url(../images/aboutBg.png) no-repeat;}
.zshu{background:url(../images/zSBg.jpg) no-repeat;}
.aboutsItem {
    display: flex;
    justify-content: space-between;
    margin-top: 40px;
    margin-bottom: 30px;
  }
  .aboutsItem li {
    width: 24%;
    background: #fff;
    padding: 40px 15px 40px 15px;
    box-sizing: border-box;
    box-shadow: -4px -4px 8px 0 rgba(1, 1, 2, 0.1),
      4px 4px 8px 0 rgba(1, 1, 2, 0.1);
    border-radius: 15px;
  }
  .aboutsItem li img {
    height: 75px;
    width: auto;
    display: block;
    margin: 0 auto;
  }
  .aboutsItem li h4 {
    font-family: "SourceHanSansCN-Bold";
    font-size: 24px;
    text-align: center;
    margin-top: 20px;
    margin-bottom: 15px;
  }
  .aboutsItem li p {
    font-family: "SourceHanSansCN-Regular";
    font-size: 21px;
    line-height: 32px;
  }
  .about .infoTxt2 {
    padding-bottom: 45px;
  }
  .concatUs {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 45px;
    padding-bottom: 75px;
  }
  .concatUs img {
    width: 45%;
    height: auto;
  }
  .concatUs > div {
    flex: 1;
    margin-left: 5%;
    color: #454545;
  }
  .concatUs > div h1 {
    font-size: 38px;
    font-family: "SourceHanSansCN-Bold";
    margin-bottom: 35px;
  }
  .concatUs > div p {
    font-size: 22px;
    line-height: 36px;
    font-family: "SourceHanSansCN-Regular";
  }
  .concatUs > div p span {
    font-size: 24px;
    color: #387ed2;font-weight: bold;
  }
  .zshu {
    background-repeat: no-repeat;
    background-position: top center;
    min-height: 500px;
    background-size: 100vw auto;
    padding-bottom:25px;
  }
  .zshu h3 {
    font-size: 37px;
    padding: 60px 0 30px 0;
    font-family: 'SourceHanSansCN-Bold';
    text-align: center;
    color: #fff;
  }
  .zsImg {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }
  .zsImg li{width:19%;padding:12px;background:#f2f2f2;border-radius: 10px;margin-bottom: 25px;box-sizing: border-box;}
  .zsImg li img{display: block;width:100%;height: 100%;}