.dg-accordion .panel-heading a {
    font-size: 22px;    
}
.page-not-found h2 {
    font-size: 140px;
    font-weight: 600;
    letter-spacing: -10px;
    line-height: 140px;
}
.page-not-found p {
    font-size: 1.4em;
    line-height: 36px;
}