body {
color: #000;
background: url(https://images.cnblogs.com/cnblogs_com/our-story/1814770/o_20072707482220130630174434_wWK3S.jpeg
) fixed;
background-size: 100%;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
min-height: 101%;
}