body {
color: #000;
background: url(https://pic2.zhimg.com/80/v2-b07c4888d43a7c552582f5dde5117615_1440w.webp) fixed;
background-size: 100%;
background-repeat: no-repeat;
font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
min-height: 100%;
}