.panel-heading [data-toggle="collapse"]:after
{
font-family: 'Glyphicons Halflings';
content: "\e072";
float: left;
color: #b0c5d8;
line-height: 22px;
-webkit-transform: rotate(-90deg);
-moz-transform: rotate(-90deg);
-ms-transform: rotate(-90deg);
-o-transform: rotate(-90deg);
transform: rotate(-90deg);
}
.panel-heading [data-toggle="collapse"].collapsed:after
{
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
-o-transform: rotate(90deg);
transform: rotate(90deg);
}