#cnblogs_post_body h2{
              width: 80%;
            height: 30px;
            background-color: cornflowerblue;
            text-align: center;
            line-height: 25px
}

#cnblogs_post_body h3{
              width: 60%;
            height: 25px;
            background-color: chartreuse;
            text-align: center;
            line-height: 25px
}

#cnblogs_post_body h4{
              width: 40%;
            height: 25px;
            background-color: aqua;
            text-align: center;
            line-height: 25px
}