@media (max-width: 750px) {
    .project-container {
        height: calc(100vh - 5rem);
    }

    .navigation {
        display: none;
    }

    .project-container .kq-bg-item,
    .project-container .qby-bg-item,
    .project-container .mk-bg-item {
        /* background: none; */
        padding-left: 0;
        background-size: 0, 0, auto 100%;
    }

    .introduce-top .kq-logo,
    .introduce-top .qby-logo,
    .introduce-top .mk-logo {
        width: 3.2rem;
        height: 3.2rem;
    }

    .kq-introduce .introduce-top,
    .qby-introduce .introduce-top,
    .mk-introduce .introduce-top {
        margin-bottom: 7rem;
        font-size: 2.8rem;
    }

    .introduce-content .introduce-text {
        font-size: 1.6rem;
        line-height: 2.4rem;
    }

    .kq-introduce,
    .qby-introduce,
    .mk-introduce {
        box-sizing: border-box;
        width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 12vw;
    }
}