diff --git a/dev.less b/dev.less
index 1d9441e..58e69db 100644
--- a/dev.less
+++ b/dev.less
@@ -134,8 +134,8 @@ display: block !important;
             color:#fff;
             border-color: #fff;
         }
-        thead tr:nth-child(2thead ) th{
-            background-color: #ff0;
+        thead tr:nth-child(2) th{
+            background-color: #f0f0f0;
             border-color: #fff;
         }