#float-window {
    color: #fff;
    display: none; /* 默认隐藏浮窗 */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 485px;
    background: url(http://gxoj.tboj.cn/file/110/testscene.png) no-repeat;
    border: 1px solid #000000;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
    padding: 10px;
    border-radius: 5px;
    /* opacity: 0; 添加透明度为0，即初始状态为完全透明 */
    /* transition: opacity 1s ease-in-out; 添加过渡效果 */
  }

    #float-window.show {
        display: block; /* 显示浮窗 */
        transition: opacity 1s ease-in-out; /* 添加过渡效果 */
    }

    #float-window h3 {
        margin-left: 10px;
        margin-top: 10px;
    }

    .choose_5{
        margin: 5px 0px 10px 0px;
        display:flex; 
        flex-wrap:wrap; 
        justify-content:center;
    }
    .choose_5 li { 
        width:45%; 
        margin:5px;
        display:inline-block; 
    }
    .choose_5 label { 
        display:block; 
    }

    .choose_4{
        margin: 5px 5px 10px 5px;    
        display:flex; 
        flex-wrap:wrap; 
        justify-content:center;
    }
    .choose_4 li { 
        width:30%; 
        margin:5px; 
        display:inline-block; 
    }
    .choose_4 label { 
        display:block; 
    }

    #float-window #confirm-btn{
        display: block;
        margin: 15px auto;
        font-size: 16px;
        padding: 10px 20px;
        width: 180px;
        cursor: pointer;
    }