#sidebar_search{
            display: none;
        }
      .post{
 width: 100%
         }
        #mainContent{
            width: 72%
        }

       #topics{
      padding:2em
       }

          #blog-calendar{
              display: none !important;
          }
        #main{
            opacity: 0.9;
        }
        body{
background:  url('https://images.cnblogs.com/cnblogs_com/woris/1770718/o_200522024007QQ%E5%9B%BE%E7%89%8720200522103948.png')fixed;
            background-size: cover;
            background-repeat: no-repeat;
        }

        #footer{
            display: none;
        }