body{
    background: url('https://ww1.sinaimg.cn/large/73ac768fgw1dt1fz00rv8j.jpg');
    background-size: cover;
    background-attachment: fixed;
}
#nav {
    background: none!important;
}
.block-content {
    background: rgba(255,255,255,0.5);
}
#page_discuss_detail .dll {
    background: rgba(242,242,242,0.3);
}
#page_discuss_detail .dlr {
    background: rgba(255,255,255,0.3);
}
.vj-list-body-tr, .vj-list, .vjlayout, .lycontent {
    background: rgba(255,255,255,0.3)!important;
}