.bianlan {
    width: 46px;
    height: 204px;
    position: fixed;
    top: 50%;
    margin-top: -102px;
    right: 45%;
    margin-right: -662px;
}

.bianlan > div {
    width: 46px;
    height: 42px;
    background-color: #a8a8a8;
    border-radius: 6px;
    margin-bottom: 6px;
    cursor: pointer;
    padding: 9px 0;
    position: relative;
}

.bianlan span {
    display: block;
}

.bianlan > :nth-child(1) span {
    background: url('../../img/bian1.png');
    width: 28px;
    height: 28px;
    background-size: 100% 100%;
    margin: 0 auto;
}

.bianlan > :nth-child(2) {
    height: 42px;
    padding: 10px 0;
}

.bianlan > :nth-child(1):hover .bian1 {
    display: block;
}

.bianlan > :nth-child(2):hover .bian2 {
    display: block;
}

.bianlan > :nth-child(3):hover .bian3 {
    display: block;
}

.bianlan > :nth-child(2) span {
    background: url('../../img/bian2.png');
    width: 32px;
    height: 28px;
    background-size: 100% 100%;
    margin: 0 auto;
}

.bianlan > :nth-child(3) span {
    background: url('../../img/bian3.png');
    width: 24px;
    height: 28px;
    background-size: 100% 100%;
    margin: 0 auto;
}

.bianlan > :nth-child(4) {
    height: 42px;
    padding: 9.5px 0;
}

.bianlan > :nth-child(4) span {
    background: url('../../img/bian4.png');
    width: 28px;
    height: 27px;
    background-size: 100% 100%;
    margin: 0 auto;
}

.bian1 {
    position: absolute;
    width: 180px;
    height: 80px;
    left: -196px;
    bottom: 0;
    background: #fff;
    text-align: center;
    border-radius: 4px;
    padding: 20px 0;
    display: none;
}

.bian2 {
    position: absolute;
    background: url('../../img/weixin1.png');
    background-size: 100% 100%;
    width: 180px;
    height: 180px;
    left: -196px;
    bottom: 0;
    display: none;
}

.bian3 {
    position: absolute;
    background: url('../../img/qrcode.jpg');
    background-size: 100% 100%;
    width: 180px;
    height: 180px;
    left: -196px;
    bottom: 0;
    display: none;
}