@media only screen and (max-width:1200px) {
    .pc {
        display: none;
    }
    .sm {
        display: block !important;
    }
    /* 头部 */
    header {
        height: 3.25rem;
        line-height: normal;
    }
    /* 底部 */
    footer {
        padding: 1.5625rem 2.5rem 3.5625rem;
    }
    .detailsls_sx p {
        width: 100%;
    }
    .detailsls_sx p:nth-child(2) {
        text-align: left;
        padding-right: 0;
    }
}