.promoblock_fullw {
    overflow: hidden;
    margin: -3px 0 71px;
    background-size: cover!important;
    background-attachment: fixed!important;
}
.promoblock_fullw-content {
    min-height: 575px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: background-color .35s;

}

.promoblock_fullw-content h2 {
    line-height: 1.2;
    text-align: center;
    margin: 0 0 28px;
    color: #fff;
    max-width: 800px;
    font-size: 60px;
}
.promoblock_fullw-content p {
    text-align: center;
    margin: 0;
    max-width: 875px;
    color: #fff;
}
.promoblock_fullw-content .btn-primary {
    margin: 51px 0 13px;
    background: #fff;
    color: #000;
}
@media (max-width: 767px) {
    .promoblock_fullw-content h2 {
        font-size: 24px;
        line-height: 1.5;
        margin-bottom: 10px;
    }
    .promoblock_fullw-content .btn-primary {
        margin: 15px 0 0;
    }
}

.promoblock_fullw {
    position: relative;
    overflow: hidden;
}

.promoblock_fullw::before {
    position: absolute;
    top: 0;
    left: -75%;
    z-index: 2;
    display: block;
    content: '';
    width: 50%;
    height: 100%;
    background: -webkit-linear-gradient(left, rgba(255,255,255,0) 0%, rgba(255,255,255,.3) 100%);
    background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255,255,255,.3) 100%);
    -webkit-transform: skewX(-25deg);
    transform: skewX(-25deg);
}

.promoblock_fullw:hover::before {
    -webkit-animation: shine .75s;
    animation: shine .75s;
}

@-webkit-keyframes shine {
    100% {
        left: 125%;
    }
}
@keyframes shine {
    100% {
        left: 125%;
    }
}