body{
background: url(https://images.cnblogs.com/cnblogs_com/YC-Yanchu/1667303/o_200311104227bg04.jpg) 0% 0% / cover no-repeat fixed;
}
#home {
opacity: 0.9;
margin: 0 auto;
width: 85%;
min-width: 950px;
background-color: #fff;
padding: 30px;
margin-top: 30px;
margin-bottom: 50px;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}