tv_xiaoyouxi/games/tdpsld/styles.css

html, body {
    margin: 0;
    padding:0;
    height: 100%;
    background-color:#000000;
}

#gameArea {
  position: absolute;
  left:     50%;
  top:      50%;
}

#gameCanvas {
  width: 100%;
  height: 100%;
}