.page_container{
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: url("../images/QQLogin.png") no-repeat;
    background-size: 100% 100%;
}

.login_qq{
    width: 200px;
    height: 190px;
    margin: 0 auto;
    line-height: 30px;
    color: #474d58;
    font-size: 15px;
    margin-top: calc((100vh - 344px) / 2);
    text-align: center;
}
.login_qq img{
    width: 150px;
}

.footer{
    position: fixed;
    bottom: 0;
    height: 84px;
    line-height: 84px;
}