#school-select {
	-webkit-overflow-scrolling: touch; /* 启用平滑滚动 */
}

#school-select:before {
	content: ""; /* 伪元素必须有content */
	position: fixed;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-image: url('../../img/xian/info-bg.jpg');
	background-size: 200px; /* 背景图覆盖容器 */
	opacity: 0.15; /* 透明度，0-1之间，值越小越透明 */
	z-index: -1;
}

/* 移动端适配 */
@media ( max-width : 768px) {
	#school-select {
		position: static;
		padding: 3rem 2rem;
	}
	#school-select:before {
		opacity: 1;
	}
	.user-name {
		position: absolute;
		top: 5rem;
		z-index: 1;
	}
}