/*
body{
    background-image: url("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1591354494495&di=4d3f074e06d8aa62fbc5d3863b874fa9&imgtype=0&src=http%3A%2F%2Fgss0.baidu.com%2F-4o3dSag_xI4khGko9WTAnF6hhy%2Fzhidao%2Fpic%2Fitem%2Fd50735fae6cd7b89528c1ec7082442a7d8330e95.jpg");
    background-position: initial;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-origin: initial;
    background-clip: initial;
    height:100%;
    width:100%;
    opacity: 0.75; 
    }*/
body {
    background-image: url("https://images.cnblogs.com/cnblogs_com/xinyuLee404/1686513/o_200606025710bg.gif") !important;
    background-repeat: repeat !important;
    background-color: #0a0a0a !important;
    opacity: 0.75; 
}