博客园嵌入CSS实现透明,并更换背景

body{
 background:url("//images.cnblogs.com/cnblogs_com/xiandong/1100507/o_%e6%a1%8c%e9%9d%a2%e8%83%8c%e6%99%afIMG_7438.JPG");
}
.CalDayHeader{
   background:none;
}
.CalTodayDay{
 background:none;
}


.catListTitle{
 background:url("//images.cnblogs.com/cnblogs_com/xiandong/1100507/o_2017-10-21_154147.jpg") no-repeat 0 ;
}
#sideBar a:visited{
color:#000000;
}
#sideBar a:link{
color:#000000;
}
#sideBar{color:#000000;}
#footer {
    background:none;
}

#home {
opacity: 0.80;
margin: 0 auto;
width: 65%;
min-width: 950px;
background-color: #fff;
padding: 30px;
margin-top: 30px;
margin-bottom: 50px;
box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}