diff --git a/static/css/chapter.css b/static/css/chapter.css
index 96cc12721a9dfa708fbb7bafea82345f03000760..3107f3b28d9bb09853f994c7088a504a049ac6fe 100644
--- a/static/css/chapter.css
+++ b/static/css/chapter.css
@@ -119,6 +119,13 @@ mark {
   display: inline;
 }
 
+/****************
+    page tab
+****************/
+.linear hr {
+  display: none;
+}
+
 /****************
     buttons
 ****************/