#zwxz img{
    display: block;
    width: 38px;
    height: 35px;
    margin: 0 auto;
    float: left;
  }
  .xxgk-download-btn{
    display: block;
    width: 100%;
    text-align: center;
    font-size: 14px;
    line-height: 30px;
    color: #333;
  }
  .xxgk-download-box{
    display: block;
    width: 15%;
    margin: 20px 30% 30px;
  }

  #zwxz span{
    position: relative;
    bottom: -35px;
    left: -50%;
  }