diff --git a/app/views/projects/_act_messages.html.erb b/app/views/projects/_act_messages.html.erb
index 2faa08f8a..0b62791e4 100644
--- a/app/views/projects/_act_messages.html.erb
+++ b/app/views/projects/_act_messages.html.erb
@@ -86,7 +86,7 @@
   <% count = all_replies.count %>
   <%# allow_delete = (activity.user == User.current || User.current.admin? || User.current.allowed_to?(:as_teacher,activity.course)) %>
   <%# count = fetch_user_leaveWord_reply(activity).count %>
-  <div class="homepagePostReply">
+  <div class="container-big-grey">
     <%= render :partial => 'projects/project_reply_banner', :locals => {:count => count, :activity => activity, :user_activity_id => user_activity_id,:is_course => is_course,:is_board =>is_board} %>
 
     <% comments = all_replies[0..2] %>
@@ -97,9 +97,9 @@
     <% end %>
 
     <% if !activity.locked? %>
-        <div class="homepagePostReplyContainer borderBottomNone minHeight48">
+        <div class="reply-container ml15 borderBottomNone minHeight48">
           <div class="homepagePostReplyPortrait mr15 imageFuzzy" id="reply_image_<%= user_activity_id%>"><%= link_to image_tag(url_to_avatar(User.current), :width => "33", :height => "33"), user_path(activity.author_id), :alt => "用户头像" %></div>
-          <div class="homepagePostReplyInputContainer mb10">
+          <div class="reply-content mb10">
             <% if User.current.logged? %>
                 <div nhname='new_message_<%= user_activity_id%>' style="display:none;">
                   <%= form_for('new_form',:url =>  {:controller=>'messages',:action => 'reply', :id => activity.id, :board_id => activity.board_id,:is_course => is_course, :is_board => 'true'},:method => "post", :remote => true) do |f|%>
diff --git a/app/views/projects/_project_message_replies.html.erb b/app/views/projects/_project_message_replies.html.erb
index 0a35e9811..9875a533d 100644
--- a/app/views/projects/_project_message_replies.html.erb
+++ b/app/views/projects/_project_message_replies.html.erb
@@ -6,11 +6,11 @@
               autoUrl('reply_content_<%= comment.id %>');
           });
       </script>
-      <li class="homepagePostReplyContainer" nhname="reply_rec">
+      <li class="reply-container ml15" nhname="reply_rec">
         <div class="homepagePostReplyPortrait">
           <%= link_to image_tag(url_to_avatar(comment.creator_user), :width => 33, :height => 33, :alt => "用户头像"), user_url_in_org(comment.creator_user.id) %>
         </div>
-        <div class="homepagePostReplyDes" onmouseover="$('#delete_reply_<%=activity_id %>_<%=comment.id %>').show();" onmouseout="$('#delete_reply_<%=activity_id %>_<%=comment.id %>').hide();">
+        <div class="reply-content ml15" onmouseover="$('#delete_reply_<%=activity_id %>_<%=comment.id %>').show();" onmouseout="$('#delete_reply_<%=activity_id %>_<%=comment.id %>').hide();">
           <%= render :partial => 'projects/project_message_contents', :locals => {:comment => comment}%>
 
           <% if !comment.content_detail.blank? %>