.ad-container-2,
.ad-container-3 {
    width: 100%;
    max-width: 760px;
    margin: 24px auto;
    clear: both;
    box-sizing: border-box;
}

#ad-yandex-2,
#ad-yandex-3,
#yandex_rtb_R-A-17620373-1,
#yandex_rtb_R-A-17620373-2 {
    width: 100%;
    margin: 0 auto;
}

@media screen and (max-width: 640px) {
    .ad-container-2,
    .ad-container-3 {
        max-width: none;
        width: 100%;
        margin: 20px auto;
    }
}