html {
  overflow-y: scroll;
}

:root {
  overflow-y: auto;
  overflow-x: hidden;
}

:root body {
  position: absolute;
}
body{
    background: url(https://images.cnblogs.com/cnblogs_com/cuiyuanhao/1715098/o_200416051303back2.jpg) fixed;
    content: '';
    background-repeat: no-repeat;
    background-position: center;
    opacity:1;
    position: fixed;
    width: 100%;
    z-index: -1;
}

/*侧边栏公告*/
#blog-news > img {
    /*头像*/
    display: block;
    margin: auto;
    border-radius: 50%;
}

#profile_block {
    font-size: 15px;
    padding: 20px;
    line-height: 1.8;
}

#profile_block > a:link {
    color: #F60;
}
#main {
    display: flex;
    margin-left: 360px;
}

/*隐藏广告*/
#ad_t2, #cnblogs_c1, #under_post_news, #cnblogs_c2, #under_post_kb {
    display: none;
}