body {
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  font-family: "Microsoft YaHei";
}

.container {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  margin: 0 auto;
  overflow: hidden;
}

img {
  width: 750px;
  height: 750px;
}

.btn {
  width: 100%;
  height: 70px;
  background: #ff0;
  color: #555;
  text-align: center;
  font-size: 50px;
  line-height: 70px;
}