*{
            margin: 0;
            padding: 0;
        }
        ul{
            list-style: none;
        }
        .carousel{
            width: 1050px;
            height: 300px;
            margin: 0 auto;
            position: relative;
            /*去掉li标签前面的图标*/
        }
        .carousel ul:nth-of-type(1){
            width: 100%;
            height: 100%;
            position: relative;
        }
        .carousel ul:nth-of-type(1) li{
            position: absolute;
            top: 0;
            left: 0;
        }
        .carousel ul:nth-of-type(1) li img{
            width: 1050px;
            height: 300px;
        }
        .active{
            display: block;
        }
        .btn_at{
            background-color: gold;
        }
        .btn_unat{
            background-color: white;
        }
        .unactive{
            display: none;
        }
        .carousel button{
            color: black;
            position: absolute;
            height: 100%;
            font-size: 25px;
            font-weight: bold;
            background-color: transparent;
            border-width: 0;
            color: white;
            display: none;
        }
        .carousel .left_btn{
            top: 0;
            left: 0;
        }
        .carousel .right_btn{
            top: 0;
            right: 0;
            vertical-align: middle;
        }
        .carousel ul:nth-of-type(2){
            position: absolute;
            bottom: 6px;
            width: 16%;
            height: 5%;
            left: 42%; 
        }
        .carousel ul:nth-of-type(2) li{
            float: left;
            border-radius: 100%;
            width: 8px;
            height: 8px;
            margin: 2px 10.7%;
        }
		#imgs{margin:0px}