body {
    color: #000;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    background: url(https://images.cnblogs.com/cnblogs_com/xiaoyuanxun/1566540/o_006qlRnCly1g1xoreeipvj31w02io4qp.jpg)  fixed;
}
#home {
margin: 0 auto;
opacity: 0.55;
width: 75%;
min-width: 1080px;
background-color: #fff;
padding: 30px;
margin-top: 50px;
margin-bottom: 50px;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}