/*屏蔽广告*/
#site_nav_under {
    display: none;
}
.commentform #under_post_card2{
display:none;
}

.commentform #under_post_card1{
display:none;
}
.c_ad_block, .ad_text_commentbox {
    display: none;
    margin: 0;
    padding: 0;
}
#ad_under_google {
    height: 0;
    overflow: hidden;
}

#ad_under_google a {
    display: none;
}
#ad_t2{
 display: none;
    margin: 0;
    padding: 0;

}
#c_ad_block{
width:300px;
height:91px;
resize:none;
!important
}
<link rel="stylesheet" type="text/css" href="https://files.cnblogs.com/files/xyz-6996/flat-ui.min.css"/>