body {
    background: transparent;
  }
  .back_img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }
  .game_content {
    position: relative;
    height: 100%;
  }
  .game_content ul {
    position: relative;
    height: 72%;
  }
  .game_content ul li {
    position: absolute;
    bottom: 2.5%;
    right: 9.5%;
    width: 20%;
    cursor: pointer;
  }
  .game_content ul li img {
    width: 2.8125vw;
  }
  .game_content ul li:nth-child(1) {
    bottom: 55%;
  }
  .game_content ul li:nth-child(2) {
    bottom: 38.8%;
  }
  .game_content ul li:nth-child(3) {
    bottom: 20.5%;
  }
  .btn_box {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .btn_box .gameBox_btn {
    width: 19.1vw;
    height: 6.875vw;
    margin-top: 4%;
  }