.wx-code {
    position: absolute;
    top: -130px;
    right: -45px;
    width: 122px;
    max-width:122px;
    display: none;
    z-index: 100;
    background-color: white;
    padding: 5px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
}

.img-a {
    position: relative;
    cursor:pointer;
}

    .img-a:hover .wx-code {
        display: block;
    }

    .img-a:hover .img-aa {
        display: none;
    }

.img-bb {
    display: none;
}

.img-a:hover .img-bb {
    display: block;
}
.list-change-box {
    margin-top: 20px !important;
}
.footer-two-img a img {margin-right:0 !important}