body {
    background: url(https://images.cnblogs.com/cnblogs_com/blogs/803741/galleries/2346590/o_230923064614_%E4%BD%A0%E7%9A%84%E5%90%8D%E5%AD%97%E5%A3%81%E7%BA%B82.jpg)fixed;
    color: #000;
    background-color: #e6e6e6;
    font-family: "Helvetica Neue",Helvetica,Verdana,Arial,sans-serif;
    font-size: 12px;
    min-height: 101%;
    opacity: 0.95;
}