大图片依据分辨率自适应宽度

<style>
    body {
        background-repeat: no-repeat;
        width: 100%;
        background-position-x: 50%;
        background-position-y: 118px;
        background-image:url(@Url.Image("/XXX/XX.jpg"));
    }
    .book {
        margin: 0 auto;
        width: 960px;
        height: 700px;
        position: relative;
    }
</style>


<div class="book"></div>