#index 

html, body {
	height: 100%;
	margin: 0;
	background-color: #ffffff;
}

.fullscreen-div {
	width: 100%;
	height: 100%;
	position: absolute; /* 或者使用fixed，取决于需求 */
	background-color: #ffffff;
}

.container {
	display: flex;
	flex-direction: column;
}

li .itroimg {
	width: 233px;
	height: 460px;
}

.middleWrapper ul {
	width: 100%;
	list-style: none;
	margin: 0;
	padding: 0;
	text-align: center;
	list-style: none; /*使子元素li居中的关键属性*/
}

.middleWrapper ul li {
	background-color: #e6e6e6;
	border: 1px solid gray;
	display: inline-block;
	height: 460px;
	width: 233px;
	line-height: 400px;
	text-align: center;
}

.sturule {
	width: 100%;
	margin: 50px 0;
}

.viewshow {
	display: block;
}

.viewhidden {
	display: none;
}

.aboutUi {
	float: left;
	text-align: left;
}
}