body {
    margin: 0px 0px 1px 0px;
    /* the extra 1px allows the iOS inner/outer check to work */
    background: #808080;
}
canvas {
    display: block;
    margin: auto;
}
#orientation {
    margin: 0 auto;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("../assets/orientation.jpg")/*tpa=http://sda.4399.com/4399swf/upload_swf/ftp24/gamehwq/20180116/17/assets/orientation.jpg*/;
    background-repeat: no-repeat;
    background-position: center;
    background-color: rgb(0, 0, 0);
    z-index: 999;
    display: none;
}