.c_top_box{
  height:210px;
}
.downLoadBtn span{
  display:inline-block;
  display: inline-block;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    background: rgb(248, 242, 230);
    border: 1px solid #dcdfe6;
    color: #606266;
    -webkit-appearance: none;
    text-align: center;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    outline: 0;
    margin: 0;
    -webkit-transition: .1s;
    transition: .1s;
    padding: 5px 10px;
    font-size: 14px;
    border-radius: 4px;
    margin-left:20px;
    float:right;
}