/*主div*/
.btcode {
    position: fixed;
    width: 100%;
    background-color: #2680d8;
    bottom: 0px;
    line-height: 3em;
    color: #fff;
    font-weight: bold;
    font-size: 1em;
}

    /*去微信的链接，右飘浮*/
    .btcode a {
        display: inline-block;
        float: right;
        background-color: green;
        text-decoration: none;
        margin-right: 0.5em;
        line-height: 2em;
        border-radius: 5px;
        padding: 0 .5em;
        margin-top: 0.5em;
        color: #fff;
    }
    /*相关文字，左飘浮*/
    .btcode div {
        float: left;
        margin-left: 0.5em;
    }
    /*微信号*/
    .btcode span {
        color: #FFFF00;
    }

.btcode2{width: 100%;background: #2680d8;color: #FFF;font-size: 1.0rem;line-height: 3rem;text-align: center;position: fixed;bottom: 0;max-width: 640px}