fromitem 样式污染

src/components/app-form-item/app-form-item.less

@@ -27,7 +27,7 @@
     color: #ea3424;
     z-index: 10;
   }
-  .sc-ion-label-ios-h {
+  > .sc-ion-label-ios-h {
     font-size: 15px;
     max-width: 33vw;
   }