.panel-heading {
    padding: 6px 7px;
    border-bottom: 1px solid transparent;
    border-top-left-radius: 3px;
    border-top-right-radius: 3px;
    
}
.panel-default > .panel-heading {
    color: #333;
    background-color:white;
}
.panel-default {
    border-color:white;
}
.panel-group .panel-heading + .panel-collapse > .panel-body, .panel-group .panel-heading + .panel-collapse > .list-group {
    border-top: 0px solid white;
}