diff --git a/public/cdn/layui-ul.css b/public/cdn/layui-ul.css
index 71016dd..5610e22 100644
--- a/public/cdn/layui-ul.css
+++ b/public/cdn/layui-ul.css
@@ -1429,7 +1429,13 @@ body .layui-quote-gray {
 }
 
 .ul-site-group {
-    margin-bottom: 4px;
+    margin-bottom: 8px;
+}
+
+.ul-site-group-header {
+    font-size     : 16px;
+    color         : #333;
+    padding-bottom: 8px;
 }
 
 .ul-site-list {