.pc {
    display: block;
}

.phone {
    display: none;
}

@media (max-width: 767px) {
    .pc {
        display: none !important;
    }

    .phone {
        display: block !important;
    }

    .navbar img {
        height: 40px;
    }

    .pz {
        width: 35%;
    }

    .gsTIT {
        width: 65%;
        height: auto;
        padding: 22px 0;
    }

    .navbar .nav {
        height: auto;
        line-height: 2;
    }

    .navbar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .nav-item {
        width: 33%;
    }

    .navbar-expand-lg .navbar-nav .nav-link {
        padding: 0;
        text-align: center;
        font-size: 18px;
    }

    .top_ph {
        display: none;
    }

    .about h2,
    .about h3 {
        text-align: center;
    }

    .about p {
        font-size: 16px;
        line-height: inherit;
    }

    .pro_nav {
        font-size: 16px;
    }

    .pro .pro_img {
        height: 155px;
    }

    .pro .more {
        font-size: 18px;
    }

    .case .case_img {
        height: 150px;
    }

    .news .news_tp {
        min-height: 250px;
    }

    .news .more {
        font-size: 18px;
    }

    .footer .f_s i {
        font-size: 20px;
        padding-right: 10px;
        padding-bottom: 10px;
    }

    .sonsort {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .sonsort a {
        width: 45%;
    }
}