/*背景图 background-image:url("https://img.zcool.cn/community/0102925b6582a4a801206a3521ab26.jpg@3000w_1l_0o_100sh.jpg");*/
body
{
 background-image: url("https://images.cnblogs.com/cnblogs_com/blogs/672076/galleries/1961386/o_2104140751542.jpg");

background-repeat: no-repeat;
background-size:100% ;
background-attachment:fixed;
color:gray;
}
/*span，a标签*/
span{
color:DeepSkyBlue;
}
 a{
color:darkred;
}