.mainView{
  .letterModule{
    width: 80%;
    margin: 30px auto;
    .el-form{
      .el-form-item:nth-child(4){
        .el-input{
          width: 120px;
          line-height: 36px;
          margin-right: 20px;
        }
        .el-image{
          width: 120px;
          height: 40px;
        }
      }
      .el-button{
        width: 220px;
        margin: 30px auto;
      }
    }
  }
}