.side-nav {
    width: 8.85vw;
    right: -8.85vw;
}

.side-nav ul li .qrcode {
    width: 6.25vw;
    margin: 0 auto 1.04vw;
}

.side-nav ul li img {
    width: 2.92vw;
    margin-bottom: 0.78vw;
}

@media screen and (max-width: 768px) {
    .side-nav {
        width: 110px;
        right: -110px;
    }

    .side-nav ul li .qrcode {
        width: 80%;
        margin: 0 auto 5px;
    }

    .side-nav ul li img {
        width: 20px;
        margin-bottom: 5px;
    }

}