.uc-accent strong{
    position:relative;
    z-index:0;
    background:transparent;
}

.uc-accent strong:after{
    content:"";
    border-top:6px solid #cf3a3f;
    width:calc(100% + 6px);
    position:absolute;
    height:1;
    bottom:1px;
    left:-3px;
    z-index:-1;
}