.pc {
    display: block;
}

.phone {
    display: none;
}

@media (max-width: 767px) {
    .pc {
        display: none !important;
    }
    .phone {
        display: block !important;
    }
    .navbar {
        height: 61px;
    }
    .collapse {
        background-color: #fff;
    }
    .navbar-expand-lg .navbar-nav .nav-link {
        padding-top: 5px;
        padding-bottom: 5px;
        padding-left: 15px;
        padding-right: 15px;
    }
    .ab_pic {
        width: 50%;
        margin: 0 auto;
    }
    .ab_text {
        font-size: 14px;
        line-height: 25px;
        padding-top: 0px;
    }
    .styleItem a dl dt {
        height: 150px;
    }
    .styleItem {
        margin-bottom: 10px;
    }
    .categorytitle {
        padding: 2rem 0 !important;
    }
    .categorytitle img {
        width: 60%;
    }
    .product {
        padding: 30px 0 15px 0;
    }
    .vedio {
        height: auto;
    }
    .v_con iframe {
        height: 198px;
    }
    .news_list {
        display: none !important;
    }
    .sj_news {
        display: block;
    }
    .sj_news .case_cc h2 {
        color: #fff;
    }
    .case_cc p {
        color: #777;
        line-height: 30px;
    }
    .sj_news .case_cc a.detail {
        color: #fff;
    }
    .sj_news .case_cc {
        border: none;
    }
    .case_cc {
        padding-left: 15px;
    }
    .contact .contact_list {
        margin: 0 auto 0;
        padding-top: 10px;
    }
    video {
        height: 200px!important;
    }
    .cp_list a p.cp_pic {
        height: 160px;
        overflow: hidden;
    }
}