.pct {
    display: block;
}

.mbt {
    display: none;
}

@media screen and (max-width: 750px) {
    .pct {
        display: none;
    }

    .mbt {
        display: block;
    }
}


#main_contents {
    width: 100%;
    position: relative;
    margin: 0px auto 30px !important;
}