div.bottom_back{position:fixed;overflow:hidden;z-index:1000;bottom:0;width:0;background-color:rgba(0,0,0,.66)}div.bottom_back .bottom_center{position:relative;margin:0 auto;padding:20px 0 10px;text-align:center}div.bottom_back .bottom_center img{text-align:center;width:600px}div.bottom_back .bottom_center .close_back{position:absolute;right:0;top:0;z-index:1001;height:46px;width:40px;overflow:hidden;border-radius:0 0 100px 100px;background-color:rgba(0,0,0,.3)}div.bottom_back .bottom_center .close_back .close{position:relative;display:inline-block;width:25px;height:25px;margin-top:5px;overflow:hidden}div.bottom_back .bottom_center .close_back .close::before,div.bottom_back .bottom_center .close_back .close::after{content:'';position:absolute;height:2px;width:100%;top:50%;left:0;margin-top:-1px;background:#fff}div.bottom_back .bottom_center .close_back .close::before{transform:rotate(45deg);-ms-transform:rotate(45deg);-moz-transform:rotate(45deg);-webkit-transform:rotate(45deg);-o-transform:rotate(45deg)}div.bottom_back .bottom_center .close_back .close::after{transform:rotate(-45deg);-ms-transform:rotate(-45deg);-moz-transform:rotate(-45deg);-webkit-transform:rotate(-45deg);-o-transform:rotate(-45deg)}div.bottom_back .bottom_center .close_back .close.rounded::before,div.bottom_back .bottom_center .close_back .close.rounded::after{border-radius:5px}.bottom_left{position:fixed;overflow:hidden;width:0;z-index:990;bottom:16px;left:0}.bottom_left img{width:180px}