diff --git a/package/comment/index.styl b/package/comment/index.styl
index 03134db..46a7b88 100644
--- a/package/comment/index.styl
+++ b/package/comment/index.styl
@@ -15,7 +15,7 @@ $gt-color-popbg := #ffffff
 $gt-size-base := 16px // default font-size
 $gt-size-border-radius := 5px
 $gt-breakpoint-mobile := 479px
-$gt-mask-z-index := 9999
+$gt-mask-z-index := 9
 
 /* functions & mixins */
 clearfix() {
@@ -216,7 +216,7 @@ $gt-size-avatar-mobi := em(32px)
     border-bottom: 1px solid $gt-color-hr
     font-size: em(16px)
     position: relative
-    z-index: 10
+    z-index: 9
     clearfix()
 
   .gt-counts