body {
    background: rgba(255, 255, 255, 1) url('https://images.cnblogs.com/cnblogs_com/GinsoTree/1694550/o_200410083946preview.jpg') fixed no-repeat;
    background-position: 50% 50%; 
    background-size: cover;
}
#post_detail{
    width: 100%;
    height: 100%;
    background: rgba(255,255 , 255, 0.1);
}
#topics{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background: rgba(255,255 , 255, 0.1);
}
#sidebar_news{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background-color: rgba(255,255 , 255, 0.0);
}
.catListComment{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background-color: rgba(255,255 , 255, 0.0);
}
.mySearch{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background-color: rgba(255,255 , 255, 0.0);
}
.sidebar-block{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background-color: rgba(255,255 , 255, 0.0);
}
.catListLink{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background-color: rgba(255,255 , 255, 0.0);
}
.catListFeedback{
    width: 100%
    height: 100%；
    margin: 0 auto;
    background-color: rgba(255,255 , 255, 0.0);
}
#home {
    margin: 0 auto;
    width: 80%;/*原始65*/
    min-width: 980px;/*页面顶部的宽度*/
    background-color: rgba(245, 245, 245, 0.7);
    padding: 30px;
    margin-top: 50px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.1);
}