Update font-style.md

docs/uni-app-x/css/font-style.md

@@ -9,4 +9,7 @@
 
 <!-- CSSJSON.font-style.compatibility -->
 
-<!-- CSSJSON.font-style.reference -->
+#### App平台差异  
\ No newline at end of file
+font-style 样式不支持继承，仅对 [text](uni-app-x/component/text.md) 组件生效。  
+
+<!-- CSSJSON.font-style.reference -->