body {
   background: url("https://bpic.588ku.com/back_pic/23/06/25/e1d0b0d86a0a331f1882328c07bf62f3.png!/fw/750/quality/99/unsharp/true/compress/true") no-repeat center center fixed;
   background-size: cover;
}
postTitle a:hover {
   color: #5c8ec6;
   text-decoration: none;
}