.about_desc {
    font-size: 0.3rem;
    font-weight: bold;
    color: #505050;
}

.about_tips {
    font-size: 0.2rem;
    color: #6D6D6D;
}

@media (max-width: 1000px) {
    .mmwave_appX {
        flex-wrap: wrap;
    }
    .mmwave_appX .msg {
        width: 100%!important;
        margin-top: 10px;
    }
    .mmwave_appX>img {
        width: 100%!important;
    }
}