div.scrollmenu a {
    padding: 25px 50px 14px 0 !important;
    text-align: center !important;
    width:15% !important;
}
.header-about {
    position: absolute;
    text-align: center;
    width: 100%;
    bottom: 40px;
}

    .header-about h1 {
        color: #fff;
        position: absolute;
        bottom: 70px;
        width: 100%;
    }
@media (min-width: 320px) and (max-width: 480px) {
    div.scrollmenu a {
        width: 38% !important;
    }
}