/*限制文章主体宽度+居中*/
#mainContent {
    max-width: 800px !important;
    margin: 0 auto !important;
}
/*正文内容容器*/
#cnblogs_post_body {
    max-width:800px;
    margin:0 auto;
    padding:0 20px;
}
/*大屏侧边栏自适应，小屏自动铺满*/
@media screen and (max-width:1000px){
    #mainContent{max-width:95% !important;}
}