优化内容区显示 review by bevishuang

@@ -31,6 +31,10 @@ body {
     }
 }
 
+@mixin content-padding {
+    padding-bottom: 34PX;
+}
+
 .iphonex-bottom-tab {
     &:after {
         content: "";
@@ -56,9 +60,11 @@ body {
 
     .group {
         .tab-content {
-            padding-bottom: 34PX;
-        }
+            @include content-padding; }
     }
+
+    .js-tab-comp {
+        @include content-padding; }
 }
 
 button,