diff --git a/css/common.css b/css/common.css
index ad04e87..a014cd4 100644
--- a/css/common.css
+++ b/css/common.css
@@ -75,6 +75,7 @@ body {
   position: relative;
   transition: all 0.3s;
   border: 1px solid #fff;
+  border-top: none;
 }
 .base .left.input-active {
   border: 1px solid #c4c7ce;
diff --git a/css/common.less b/css/common.less
index 5c0fe8c..2b9a7cd 100644
--- a/css/common.less
+++ b/css/common.less
@@ -89,6 +89,7 @@ body {
         position: relative;
         transition: all 0.3s;
         border: 1px solid #fff;
+        border-top: none;
 
         &.input-active {
             border: 1px solid #c4c7ce;