.bk-collapse{
    color:#63656e;
}

.bk-collapse .bk-collapse-header{
        padding:10px;
        font-size:14px;
    }

.bk-collapse .bk-collapse-header i.bk-icon{
            -webkit-transition:all linear 0.3s;
            transition:all linear 0.3s;
        }

.bk-collapse .bk-collapse-header .rotate-icon{
            position:relative;
            -webkit-transform:rotate(90deg);
                    transform:rotate(90deg);
        }

.bk-collapse .bk-collapse-content{
        padding:5px 10px 20px 10px;
        will-change:all;
        font-size:14px;
        color:#63656e;
    }