.check-box{
  max-width: 120px;
  height: 35px;
  line-height: 35px;
  cursor: pointer;
  .img{
    display: inline-block;
    width: 14px;
    height: 14px;
    vertical-align: middle;
    margin-right: 4px;
    background: #fff;
    -webkit-appearance: none;
    border: 1px solid #c9c9c9;
    border-radius: 4px;
    outline: none;
    cursor: pointer;
  }
  .on{
    .img;
    background: url("../../images/first.png") no-repeat;
    background-size: 93% 100%;
  }
}