a.link-banner-milano25 {
    display: block;
    position: absolute;
    top: 89px;
    left: 44%;
}

@media (max-width: 540px) {
    a.link-banner-milano25 {
        display: block;
        position: absolute;
        top: -100px;
        left: 0;
        margin: 0 auto;
        right: 0;
        width: fit-content;
    }
}