@media screen and (max-width: 1024px) {
    .pic-block {
        width: 100%;
    }
}
@media screen and (min-width: 1024px) {
    nav ul li:nth-child(1) {
        display: block;
    }
    nav ul li:nth-child(2) {
        display: block;
    }

    nav ul li:nth-child(5) {
        display: block;
    }

    .contentZone {
        margin-top: 90px;
    }
}
@media screen and (min-width: 768px) {
    .img-responsive {
        display: block;
        width: 100%;
        height: 26vw;
    }
    .searchLiItem {
        display: none;
    }
    .aboutShow {
        display: block;
    }

}
@media screen and (max-width: 768px) {
    .img-responsive {
        display: block;
        width: 100%;
        height: 55vw;
    }
    .navbar-form {
        display:none;
    }
    .searchLiItem {
        display: block;
    }
    .aboutShow {
        display: none;
    }

    .contentZone {
        margin-top: 130px;
    }
    nav ul li:nth-child(1) {
        display: none;
    }
    nav ul li:nth-child(2) {
        display: none;
    }
    nav ul li:nth-child(5) {
        display: none;
    }
}

@media screen and (max-width: 480px) {
    .img-responsive {
        display: block;
        width: 100%;
        height: 50vw;
    }
}