body {
color: #000;
background: url(https://images.cnblogs.com/cnblogs_com/blogs/778230/galleries/2259623/o_230102062556_32.png) fixed;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
font-size: 20px;
min-height: 101%;
}
#home { 
    opacity: 0.90;
    width:75%;
}