body {
    font-size: 15px;
    font-family : 微软雅黑;
    background: url("https://images.cnblogs.com/cnblogs_com/ExcuseMe/830494/o_512c7f0dbaff6.jpg") no-repeat fixed center top;
    background-size:cover;
}
#main{
    background: #fff;
    filter:alpha(opacity=85);
	-moz-opacity:0.85;
	opacity: 0.85;
	border: 1px solid #000000;
    -moz-border-radius: 15px; 
    -webkit-border-radius: 15px; 
}
#site_nav_under {
    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;
}