/* 定制博客背景图片，url里面是你的图片位置信息 */
body {
     background-color: #efefef;
     background-image:url(https://images.cnblogs.com/cnblogs_com/blogs/719071/galleries/2065033/o_211119032938_%E5%8D%9A%E5%AE%A2%E5%9B%AD%E8%83%8C%E6%99%AF%E5%9B%BE3.jpeg);
     background-repeat: no-repeat;
     background-attachment: fixed;
     background-position: center 0;
     background-size: cover;
    padding-top:0px;
  }

#mainContent {
    width: 1700px;
    background: white;
    box-shadow: 0px 0px 8px #999;
    -moz-box-shadow: 0px 0px 8px #0c0b0b;
    -web-kit-shadow: 0px 0px 8px #999;
    border-radius: 6px;
    -moz-border-radius: 6px;
    -web-kit-shadow: 6px;
    float: right;
    display: inline-block;
}
/*总体宽度1550px*/
#navigator, #blogTitle, #main, #footer {
    width: 1900px;
    position: relative;
    margin: 0 auto;
}