#background .bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: none;
    overflow: hidden;
    z-index: -1;
    -webkit-background-size: cover !important;
    -moz-background-size: cover !important;
    -o-background-size: cover !important;
    background-size: cover !important;
}

#background-ie {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #211f1f;
}


/*
<div id="background">
    <div class="bg-image" style="background: url('//static.llilii.cn/images/kagamine/32639516_p2.jpg') no-repeat center center; display: block;"></div>
</div>
*/