--- a/css/tram-im.css	Sat Dec 03 12:30:08 2016 +0800
+++ b/css/tram-im.css	Sat Dec 03 12:32:39 2016 +0800
@@ -64,12 +64,13 @@
     margin-top: 15px;
     margin-bottom: 15px;
 }
-.input-group {
+.uk-form.input-group {
     display: table;
 }
-.input-group > input {
+.uk-form.input-group > input {
     display: table-cell;
     width: 100%;
+    border-right: 0;
 }
 .input-group-button {
     display: table-cell;