css弹出框

css代码：

.yx-dialog-info{display: none;border: 1px red #f7f7f7;z-index: 999;border-radius: 10px;width: 270px;height: 100px;position: absolute;top: 50%;left: 50%;transform: translate(-50%,-50%);-ms-transform: translate(-50%,-50%);-o-transform: translate(-50%,-50%);-moz-transform: translate(-50%,-50%);-webkit-transform: translate(-50%,-50%);-khtml-transform: translate(-50%,-50%);background-color: #f7f7f7;-webkit-box-shadow: 0 0 15px rgba(0,0,0,.1);        box-shadow: 0 0 15px rgba(0,0,0,.1);        text-align: center;    }