body {
color: #000;
background: url(https://images.cnblogs.com/cnblogs_com/exgarage/1211188/o_6e03a2119313b07ea94c3ad00cd7912395dd8c62.jpg) fixed;
background-size: cover;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
font-size: 12px;
min-height: 101%;
}
#home {
opacity: 0.70;
margin: 0 auto;
width: 65%;
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);
}