html,body{height:100%}.layer_board_bg,.layer_board{position:absolute}.layer_board_bg{position:fixed;width:100%;height:100%;z-index:1000;top:0;left:0;display:none;cursor:pointer;background:#000}.layer_board{display:none;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;z-index:2000;padding:50px;width:640px}@media screen and (max-width:768px){.layer_board{width:100%;padding:0}}.layer_board p{margin-bottom:50px}.btn_close{display:block;text-decoration:none;background:#000;color:#fff;text-align:center;padding:20px 40px;width:200px;margin:0 auto}