diff --git a/media/css/seahub.css b/media/css/seahub.css
index 8bdc60756d..3f31465a95 100644
--- a/media/css/seahub.css
+++ b/media/css/seahub.css
@@ -221,7 +221,7 @@ button,
 input[type=submit],
 input[type=button],
 input.submit,
-.btn-link,
+.sf-btn-link,
 .fileinput-button,
 select {
     padding:5px 6px;
@@ -231,7 +231,7 @@ select {
     border: 1px solid #c5c5c5;
     border-radius: 2px;
 }
-.btn-link {
+.sf-btn-link {
     display:inline-block;
     color:#333;
     line-height:19px;
@@ -244,7 +244,7 @@ select {
     padding:6px 20px;
     border-radius:3px;
 }
-.btn-link:hover {
+.sf-btn-link:hover {
     color:#333;
     text-decoration:none;
 }
@@ -280,7 +280,7 @@ input[type=submit]:hover,
 input[type=reset]:hover,
 input[type=button]:hover,
 button:hover,
-.btn-link:hover,
+.sf-btn-link:hover,
 .fileinput-button:hover {
     cursor:pointer;
     background:#fff;
@@ -2467,7 +2467,7 @@ button.sf-dropdown-toggle:focus {
     border:1px solid #ccc;
 }
 #file-op button,
-#file-op .btn-link {
+#file-op .sf-btn-link {
     padding:2px 8px;
 }
 #file-enc-cont {
diff --git a/seahub/templates/shared_file_view.html b/seahub/templates/shared_file_view.html
index b3faa593d3..f561388f37 100644
--- a/seahub/templates/shared_file_view.html
+++ b/seahub/templates/shared_file_view.html
@@ -71,7 +71,7 @@
 <script type="text/javascript">
 $(function() {
     var dld_btn = $('.obv-btn').clone();
-    dld_btn.html("{% trans "Download" %}").attr('class', 'btn-link big-btn-link');
+    dld_btn.html("{% trans "Download" %}").attr('class', 'sf-btn-link big-btn-link');
     $('#file-view-tip').append(dld_btn);
 
     {% if traffic_over_limit %}
diff --git a/seahub/templates/sysadmin/userinfo.html b/seahub/templates/sysadmin/userinfo.html
index c902da4f45..41f97f8160 100644
--- a/seahub/templates/sysadmin/userinfo.html
+++ b/seahub/templates/sysadmin/userinfo.html
@@ -54,7 +54,7 @@
             {% endif %}
 
             <dt>{% trans "Space Used" %}</dt>
-            <dd>{{ space_usage|seahub_filesizeformat }} {% if space_quota > 0 %} / {{ space_quota|seahub_filesizeformat }} {% endif %}  <a href="#" class="btn-link" style="margin-left:20px;" id="set-quota">{% trans "Set Quota" %}</a></dd>
+            <dd>{{ space_usage|seahub_filesizeformat }} {% if space_quota > 0 %} / {{ space_quota|seahub_filesizeformat }} {% endif %}  <a href="#" class="sf-btn-link" style="margin-left:20px;" id="set-quota">{% trans "Set Quota" %}</a></dd>
         </dl>
 
         <form id="set-quota-form" method="post" class="hide">{% csrf_token %}
diff --git a/seahub/templates/view_file_base.html b/seahub/templates/view_file_base.html
index 6e1196df62..151f8f0932 100644
--- a/seahub/templates/view_file_base.html
+++ b/seahub/templates/view_file_base.html
@@ -68,7 +68,7 @@
             {% endif %}
 
             {% if file_perm == 'rw' %}
-            <a class="btn-link" id="history" href="{% url 'file_revisions' repo.id %}?p={{ path|urlencode }}">{% trans "History" %}</a>
+            <a class="sf-btn-link" id="history" href="{% url 'file_revisions' repo.id %}?p={{ path|urlencode }}">{% trans "History" %}</a>
             {% endif %}
 
             {% if request.user.is_authenticated and can_edit_file %}
@@ -76,7 +76,7 @@
                 {% endblock %}
             {% endif %}
 
-            <a class="btn-link" href="?dl=1" id="download">{% trans "Download"%}</a>
+            <a class="sf-btn-link" href="?dl=1" id="download">{% trans "Download"%}</a>
         </div>
 
         <div id="file-view">
@@ -110,7 +110,7 @@
 // download
 $(function() {
     var dld_url = $('#download').attr('href');
-    $('#file-view-tip').append('<a href="' + dld_url + '" class="btn-link big-btn-link">' + "{% trans "Download" %}" + '</a>');
+    $('#file-view-tip').append('<a href="' + dld_url + '" class="sf-btn-link big-btn-link">' + "{% trans "Download" %}" + '</a>');
 });
 
 // share link
diff --git a/seahub/templates/view_file_markdown.html b/seahub/templates/view_file_markdown.html
index d8118fd338..92cd45e840 100644
--- a/seahub/templates/view_file_markdown.html
+++ b/seahub/templates/view_file_markdown.html
@@ -10,7 +10,7 @@
 
 {% block edit_file %}
 {% if file_perm == 'rw' and not err%}
-<a class="btn-link" href="{{ SITE_ROOT }}repo/{{ repo.id }}/file/edit/?p={{ path|urlencode }}&file_enc={{file_enc}}" id="edit">{% trans "Edit"%}</a>
+<a class="sf-btn-link" href="{{ SITE_ROOT }}repo/{{ repo.id }}/file/edit/?p={{ path|urlencode }}&file_enc={{file_enc}}" id="edit">{% trans "Edit"%}</a>
 {% endif %}
 {% endblock %}
 
diff --git a/seahub/templates/view_file_text.html b/seahub/templates/view_file_text.html
index 3a3f2316d8..d2b64c78fd 100644
--- a/seahub/templates/view_file_text.html
+++ b/seahub/templates/view_file_text.html
@@ -19,7 +19,7 @@
 
 {% block edit_file %}
 {% if file_perm == 'rw' and not err%}
-<a class="btn-link" href="{{ SITE_ROOT }}repo/{{ repo.id }}/file/edit/?p={{ path|urlencode }}&file_enc={{file_enc}}" id="edit">{% trans "Edit"%}</a>
+<a class="sf-btn-link" href="{{ SITE_ROOT }}repo/{{ repo.id }}/file/edit/?p={{ path|urlencode }}&file_enc={{file_enc}}" id="edit">{% trans "Edit"%}</a>
 {% endif %}
 {% endblock %}
 
diff --git a/seahub/templates/view_history_file.html b/seahub/templates/view_history_file.html
index f48c20b36d..f40fb83d49 100644
--- a/seahub/templates/view_history_file.html
+++ b/seahub/templates/view_history_file.html
@@ -29,7 +29,7 @@
               {% endblock %}
             </p>
 
-            <a class="btn-link" href="{% url 'download_file' repo.id obj_id%}?file_name={{ file_name|urlencode }}&p={{path|urlencode}}" id="download">{% trans "Download"%}</a>
+            <a class="sf-btn-link" href="{% url 'download_file' repo.id obj_id%}?file_name={{ file_name|urlencode }}&p={{path|urlencode}}" id="download">{% trans "Download"%}</a>
         </div>
         {% include 'snippets/file_content_html.html' %}
     </div>
@@ -40,7 +40,7 @@
 <script type="text/javascript">
 $(function() {
     var dld_url = $('#download').attr('href');
-    $('#file-view-tip').append('<a href="' + dld_url + '" class="btn-link big-btn-link">' + "{% trans "Download" %}" + '</a>');
+    $('#file-view-tip').append('<a href="' + dld_url + '" class="sf-btn-link big-btn-link">' + "{% trans "Download" %}" + '</a>');
 });
 
 {% if filetype == 'PDF' and use_pdfjs %}