.container{
                position: relative;
                width: 301px;
                height: 210px;
                float: left;
            }
            .imgs img{
                position: absolute;
                cursor: pointer;
                top: 0;
            }
            .imgs img{
            	width: 301px;
            	height: 210px;
            }
            .circle{
                width: 200px;
                height: 20px;
                position: absolute;
                bottom:10px;
                left: 40%;
                text-align: center;
                cursor: pointer;
            }
            .circle b{
                display: inline-block;
                width: 10px;
                height: 10px;
                background-color: #000;
                border-radius: 50%;
                margin: 3px;
            }
            .circle .current{
                background-color: #fff;
            }
            .btn{
                position: absolute;
                top: 25%;
                width: 50px;
                height: 100px;
                color: white;
                opacity: 0.5;
                text-align: center;
                line-height: 100px;
                font-size: 60px;
                cursor: pointer;
            }
            .btn:hover{
                background-color: rgba(255, 255, 255, .7);
            }
            .left{
                left: 0;
            }
            .right{
                right: 0;
            }