diff --git a/src/tabs/index.less b/src/tabs/index.less
index 07b4bf9..2d49110 100644
--- a/src/tabs/index.less
+++ b/src/tabs/index.less
@@ -174,6 +174,7 @@
   &__expand-content{
     position: absolute;
     background: #f5f5f5;
+    z-index: 500;
   }
 
   &__expand-mask{
@@ -204,8 +205,6 @@
     box-shadow: 0px -1px 0px 0px rgba(0, 0, 0, 0.06) inset;
     background: #fff;
     padding: 16px;
-    margin-left: -10px;
-    margin-right: -10px;
   }
 
   &__expand-item {