.about-img {
    text-align: center;
    background-size: cover;
    height: auto;
    margin: 0 0 40px 0;
}
#cnblogs_post_body p {
    margin: 10px auto;
    text-indent: 0;
    font-size: 16px;
}
 


<style type="text/css">
    #cnblogs_post_body
    {
        color: black;
        font: 0.875em/1.5em "微软雅黑" , "PTSans" , "Arial" ,sans-serif;
        font-size: 17px;
    }
   /*标题1*/
#cnblogs_post_body h1 {
    color: #fff;;
    padding-left: 15px;
    background-color: #84C1FF !important;
    text-shadow: 2px 2px 3px #222222;
    font-family: "微软雅黑" , "宋体" , "黑体" ,Arial;
    margin-bottom: 5px;
    font-size: 23px;
}
   /*标题2*/
#cnblogs_post_body h2 {
    color: #fff;
    padding-left: 15px;
    background-color: #6FA833 !important;
    text-shadow: 2px 2px 3px #222222;
    font-family: "微软雅黑" , "宋体" , "黑体" ,Arial;
    margin-bottom: 5px;
    font-size: 20px;
}
/*标题3*/
#cnblogs_post_body h3 {
    color: #009ACD;
    border-left: 13px solid #009ACD;
    padding: 5px;
    background-color: #f5f5f5;
   font-size: 18px;
}
</style>