body {
background-color: #efefef;

background-image:url(https://images.cnblogs.com/cnblogs_com/pureray-hui/2126396/o_220317023102_%E5%B4%96%E4%B8%8A%E7%9A%84%E6%B3%A2%E5%A6%9E.jpg);

background-repeat: no-repeat;

background-attachment: fixed;

background-position: center 0;

background-size: cover;

padding-top:0px;

}