*{box-sizing:border-box;}
        body{margin:0;padding:20px;background:#fff;font-family:微软雅黑;}
        .container{max-width:90%;margin:0 auto;}
        .title{text-align:center;font-size:20px;margin:10px 0 20px;color:#000000;}
       .title_da{text-align:center;font-size:60px;margin:10px 0 20px;color:#333; font-weight: bold}
       .title_xiao{text-align:center;font-size:12px;margin:10px 0 20px;font-weight:normal;color: #E80105;}
        .btn-bar{display:flex;gap:10px;justify-content:center;margin:20px 0}
        .btn-bar button{padding:10px 16px;border:none;border-radius:10px;background:#f5f5f5;color:#333;cursor:pointer}
        .btn-bar button:hover{background:#007bff;color:#fff;}

        /* 滑块样式 */
        .slider-box{
            max-width: 400px;
            margin: 20px auto;
            text-align: center;
        }
        .slider-box label{
            font-size: 16px;
            margin-bottom: 8px;
            display: block;
            color: #333;
        }
        #duration{
            width: 100%;
            height: 6px;
            -webkit-appearance: none;
            background: #eee;
            border-radius: 3px;
            outline: none;
        }
        #duration::-webkit-slider-thumb{
            -webkit-appearance: none;
            width: 20px;
            height: 20px;
            background: #007bff;
            border-radius: 50%;
            cursor: pointer;
        }
        #duration-value{
            font-size: 16px;
            color: #007bff;
            font-weight: bold;
            margin-top: 8px;
            display: block;
        }

        .img-list{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:20px 0}
        .img-item{width:200px;border:2px solid #eee;background:#fff;border-radius:12px;overflow:hidden;cursor:move;position:relative}
        .img-item img{width:100%;height:220px;object-fit:cover;display:block}
        .img-item .check{position:absolute;top:8px;left:8px;width:20px;height:20px}
        .img-item.checked{border-color:#007bff;background:#e6f2ff}
        .submit-btn{text-align:center;margin:30px 0}
        .submit-btn button{width:100%;padding:16px;border:none;border-radius:14px;background:#007bff;color:#fff;font-size:26px;cursor:pointer;font-weight:bold}

        #loading-mask{
            position:fixed;top:0;left:0;width:100%;height:100%;
            background:rgba(0,0,0,0.75);z-index:9999;
            display:none;align-items:center;justify-content:center;
            color:#fff;font-size:20px;font-weight:bold;
        }
        .loader-icon{
            width:40px;height:40px;border:4px solid #fff;
            border-top-color:transparent;border-radius:50%;
            animation:rot 1s linear infinite;margin-right:12px;
        }
        @keyframes rot{to{transform:rotate(360deg)}}