.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    /* 修正了 margin: 0; */
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}


.d_none {
    display: none;
}

@media (max-width: 768px) {

    .p_none {
        display: none;
    }

    .d_none {
        display: block !important;
    }
}