.d-con-vehicle-list ul {
    list-style: none;
    padding: 0;
}

.d-con-vehicle-list ul li {
    float: left;
    text-align: center;
    width: 16.6666%;
}

@media screen and (max-width: 991px) {
    .d-con-vehicle-list ul li {
        width: 25%;
        margin-bottom: 10px;
    }
}

@media screen and (max-width: 700px) {
    .d-con-vehicle-list ul li {
        width: 50%;
    }
}

@media screen and (max-width:505px) {
    .d-con-vehicle-list ul li {
        width: 100%;
    }
}