body{
position:relative;
 <!--
background-image:url("https://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_2017-03-13.jpg");
 -->

background-repeat: no-repeat;
background-size: cover;
background-attachment: fixed;
}

#home{
position:relative;

z-index:1;

background-color: rgba(255,255,255,0.83);
 
background-image:url("https://images.cnblogs.com/cnblogs_com/xiaobo-Linux/736394/o_dreams.png");
 
background-repeat:no-repeat;
background-position-x:400px;

box-shadow:0px 0px 5px black;
overflow:hidden;
}
#home.befor{
position:relative;
z-index:-1;
filter:blur(50px);
}


.newsItem{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
.newsItem.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}



#blog-calendar{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
#blog-calendar.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}
 

.catListEssay{
position:relative;
 
background-color: rgba(255,255,255,0);

}

.catListEssay.befor{
position:relative;
 
filter:blur(20px);
}

 

.mySearch{
position:relative;
 
background-color: rgba(255,255,255,0);

}

.mySearch.befor{
position:relative;
 
filter:blur(20px);
}


#sidebar_postcategory{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
#sidebar_postcategory.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}


#sidebar_postarchive{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
#sidebar_postarchive.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}

 
.catListBlogRank{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
.catListBlogRank.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}
 
.catListComment{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
.catListComment.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}
 
.catListView{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
.catListView.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}
 

.catListFeedback{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
.catListFeedback.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}

  
.catListView{
position:relative;
z-index:1;
background-color: rgba(255,255,255,0);

}
.catListView.befor{
position:relative;
z-index:-1;
filter:blur(20px);
}