body {
    color: #000;
 /*   background: url(https://www.cnblogs.com/images/cnblogs_com/fan-jiaming/1288453/o_background.jpg) fixed;  */
    background-size: cover;
    background-repeat: repeat;

    
}

#home {
    
    background-color: rgba(255,255,255,0.8);

    box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}