.playground  {
    width: 525px;
    height: 550px;
    margin: 20px auto 0 auto;
    position: relative;
    background-image:url("tetris.jpg");
}
.playground img  { position: absolute;}
.playground p  {font-size: 30px;
                font-family: 'SimHei';
                font-weight: bold;
                color: #667799;
                position: absolute;
                left:305px;
                top:120px;
}
.playground p+p  {  top:176px; }
.playground p+p+p  { top:232px; }
   body {
      -webkit-touch-callout: none;
      -webkit-user-select: none;
      user-select: none;
      margin: 0;
      padding: 0;
    }
 /* 新增层级控制 */
.playground {
  z-index: 1 !important; /* 限制游戏界面层级 */
  position: relative;
}

.vc-icon {
  z-index: 2147483647 !important; /* 最大合法z-index值 */
  position: fixed !important;
  right: 20px !important;
  bottom: 20px !important;
  transform: none !important;
}