#top_nav,#lnkBlogLogo{
    display: none;
}
::-webkit-scrollbar{width:4px;height:4px}
::-webkit-scrollbar-thumb{border-radius:1px;box-shadow:inset 0 0 5px #314659;background:#314659}
::-webkit-scrollbar-track{background:0;border-radius:1px}

body { 
background-image:url('https://images.cnblogs.com/cnblogs_com/wuzui/2060662/o_211112012707_1.jpg'); 
background-repeat: no-repeat; 
background-attachment: fixed;
background-size: cover;
}