body{
    color: #000;
    background: url(https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fb-ssl.duitang.com%2Fuploads%2Fitem%2F201804%2F04%2F20180404205459_5X8xu.jpeg&refer=http%3A%2F%2Fb-ssl.duitang.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1643031659&t=6895c4c58887592d0d6d2d32aff0256f) fixed;
    background-position: center 0;
    background-attachment: fixed;
    -webkit-background-size: cover;
    min-height: 101%
}
#home{
    background-color: #fafafa;
    opacity: 0.90;
    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}