.panel-group {
    margin-bottom: 0;
}
.panel-group .panel {
    border-radius: 0;
    box-shadow: none;
}
.panel-group .panel .panel-heading {
    padding: 0;
}
.panel-group .panel .panel-heading h4 a {
    background: #f6f9fc;
    display: block;
    font-size: 15px;
    line-height: 20px;
    padding: 15px;
    text-decoration: none;
    transition: 0.15s all ease-in-out;
}
.panel-group .panel .panel-heading h4 a:hover, .panel-group .panel .panel-heading h4 a:not(.collapsed) {
    /*background: #fff;*/
    transition: 0.15s all ease-in-out;
}
.panel-group .panel .panel-heading h4 a:not(.collapsed) i:before {
    content: "-";
    font-size: 30px;
    line-height: 10px;
}
.panel-group .panel .panel-heading h4 a i {
    color: #999;
    font-size: 12px;
}
.panel-group .panel .panel-body {
    padding-top: 0;
}
.panel-group .panel .panel-heading + .panel-collapse > .list-group,
.panel-group .panel .panel-heading + .panel-collapse > .panel-body {
    border-top: none;
}
.panel-group .panel + .panel {
    border-top: none;
    margin-top: 0;
}