pref: button show error on xiaomi

pages/myFile/myFile.wxss

@@ -86,7 +86,7 @@
 }
 .actions {
   width: 690rpx;
-  height: 80rpx;
+  height: 100rpx;
   position: fixed;
   bottom: 80rpx;
   background-color: #f7f7f7;