/* 设置按钮CSS样式默认透明 */

.btn{
	background-color:transparent;
	border-style:none;
}
.popup {
	display: none;
	position: fixed;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
	width: 300px;
	height: 200px;
	background-color: #fff;
	border: 1px solid #ccc;
	padding: 20px;
	z-index: 9999;
}