#home {
    margin: 0 auto;
    width: 80%;/*原始65*/
    min-width: 980px;/*页面顶部的宽度*/
    background-color: rgba(245, 245, 245, 0.7);
    padding: 30px;
    margin-top: 50px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
body {
    background-image:url("https://images.cnblogs.com/cnblogs_com/Raite/1657454/o_200228145028微信图片_20200215215420.jpg");
    background-position: 50% 5%; 
    background-size: cover;
}