header {
	position: fixed;
	padding: 20px;
}

a {
	-webkit-user-select: none;/*webkit浏览器*/
	-moz-user-select: none;/*火狐*/
	-ms-user-select: none;/*IE10*/
	user-select: none;
	-webkit-user-drag: none;
}

img {
	-webkit-user-select: none;/*webkit浏览器*/
	-moz-user-select: none;/*火狐*/
	-ms-user-select: none;/*IE10*/
	user-select: none;
	-webkit-user-drag: none;
}

.side-nav {
	height: 100%;
	width: 200px;
	position: fixed;
	z-index: 999;
	top: 0;
	left: -200px;
	background-color: #fff;
	transition: 0.5s;
	padding: 60px 18px 18px 18px;
}

.side-nav a {
	background-color: #fff;
	border-radius: 10px;
	padding: 12px 13px 12px 13px;
	text-decoration: none;
	font-size: 15px;
	color: #818181;
	display: block;
	transition: 0.3s;
	-webkit-user-drag: none;
}

.nav-title {
	display: flex;
	flex-direction: row;
	gap: 8px;
	font-size: 18px;
	font-weight: bold;
	margin-top: 16px;
	margin-bottom: 12px;
	align-items: center;
	
	-webkit-user-select: none;/*webkit浏览器*/
	-moz-user-select: none;/*火狐*/
	-ms-user-select: none;/*IE10*/
	user-select: none;
}

.nav-title .light {
	width: 4px;
	height: 20px;
	background-color: #74A8FF;
	transition: 0.5s;
	border-radius: 2px;
}

.nav-item .checked {
	background-color: #74A8FF;
	font-weight: bold;
	color: #fff;
}
.nav-item .checked:active {
	background-color: #74A8FF;
	font-weight: bold;
	color: #fff;
}

.menu-span img {
	width: 24px;
	height: 24px;
}

.closeButton {
	position: absolute;
	top: 0;
	right: 25px;
	font-size: 36px;
	margin-left: 50px;
	color: #000;
	transition: 0.3s;
	
	-webkit-user-select: none;/*webkit浏览器*/
	-moz-user-select: none;/*火狐*/
	-ms-user-select: none;/*IE10*/
	user-select: none;
}

.side-nav a:active {
	color: #000;
	background-color: #f1f1f1;
}

.side-nav.active {
	left: 0;
}


.link-box {
	display: flex;
	flex-direction: row;
	gap: 12px;
	justify-content: center;
	position: absolute;
	width: 100%;
	bottom: 0;
	left: 0;
	right: 0;
	padding-bottom: 1vmax;
}

.link-box a {
	width: 50px;
	height: 50px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.link-box img {
	height: 20px;
}