#home {

    background-color: rgba(255,255,255,0.2);

}
/*推荐按钮浮动到右下角*/
#div_digg {
    position: fixed;
    bottom: 40px;
    right: 20px;
    background-color: #DCFCE9;
    border: 8px double #06F867;
    padding: 10px;
    margin: 10px;
    text-align: center;
}