/*boby调节背景图片*/
body {
    background:url("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1557815913839&di=1f014bf21d1df0f988ee43aeafcc382d&imgtype=0&src=http%3A%2F%2Fb-ssl.duitang.com%2Fuploads%2Fitem%2F201707%2F09%2F20170709144233_kQPKE.png");
    background-position:center left;
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment:fixed
}

#home {

    margin: 0 auto;
        margin-top: 0px;
        margin-bottom: 0px;
    width: 70%;
    min-width: 949px;
    background-color: #fff;
    padding: 30px;
    margin-top: 50px;
    margin-bottom: 50px;
    box-shadow: 0 2px 6px rgba(77, 77, 77, 0.3);
    opacity: 0.90;

}