body{
margin:0;
padding:0;
background-color:transparent;
}
body::after {
width:100%;
height:100vh;
content: "";
background:url(https://images.cnblogs.com/cnblogs_com/wang-sai-sai/1805439/o_200713102000medicine.jpg) no-repeat ;
background-size:100% ;
opacity: 0.6;
top: 0;
position:fixed;
z-index: -1; 
}
#wrapper{
opacity: 0.96;
}

/*****************头部*************************/
#header>#top{
height:20vh;
//padding-top:8vh;
line-height:12vh;
background: url(https://images.cnblogs.com/cnblogs_com/wang-sai-sai/1805439/o_200820022933title.png) ;
//background-repeat:no-repeat;
background-position:center;
background-size: auto 100%;
color:#2b3a58;
text-align:center;
}
#header>#top>h1{
font-size:32px;
}

#header>#sub{
display:none;
}
/****去除顶部广告*****/
div#top_nav { display:none } 
div#bannerbar {display: none;}
/*******************/
.post h2:hover{
padding-left:10px;
}
/***加关注*******/
#myAtt{
width:80%;
margin:4px auto;
text-decoration:none;
border:1px solid #333;
text-align:center;
padding:4px 10px;
border-radius:6px;
color:#333;
color:rgba(20,64,139,1);
background:rgba(20,64,139,.1);

}