.serveice-items {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    margin: 0 0 150px;
}
.service-item {
    width: 31%;
}
@media screen and (max-width: 768px) {
    .serveice-items {
        margin: 0 0 100px;
    }
    .service-item {
        width: 100%;
    }
    .service-item:not(:last-child) {
        margin: 0 0 25px;
    }   
}

.row3::after {
    background: url(../images/bg_diagonal.jpg) no-repeat;
    background-position: center;
    background-size: cover;
    content: "";
    height: 800px;
    position: absolute;
    top: -200px;
    left: 0;
    transform: skewY(25deg);
    width: 100%;
    z-index: 0;
}
.row2::before,
.row3::before {
    display: none;
}