update:更新

src/components/app-stepper/app-stepper.scss

 .app-stepper{
-    .el-input-number__decrease,.el-input-number__increase{
-        width: 34px;
-        height: calc( 100% - 4px);
-        margin-top: 1px;
-    }
     .el-input-number__increase{
         border-left: 1px solid #dcdfe6!important ;
     }