.content {
	/*height: 1350px;*/
}

footer {
	background-color: rgb(85, 0, 125);
	color: white;
	padding: 15px;
	height: 110px;
}

.sidenav {
	padding-top: 30px;
	padding-left: 0px;
	text-align: center;		/*框架置中*/
	background-color: rgb(0, 174, 174);
}

.sidenav h4 {
	text-align: center;
	color: indigo;
	padding: 20px;
}

.sidenav a {
	text-align: left;
	text-decoration: none;
	color: indigo;
	font-size: 22px;
	padding: 20px;
}

.sidenav a:hover {
	color: yellow;
}

.page {
	background-color: rgb(222, 222, 222);
	width: 100%;
	padding: 8px;
}

.page:hover {
	background-color: indigo;
	transition: 1s;
}

.main-content {
	background-color: white;
	padding: 20px 10px 0px 10px;    /*上20px，右10px，下0px，左10px*/
}

.main-content h1 {
	text-align: center;
	padding: 20px;
}

.ad {
	padding: 10px;
	margin: 10px;
	border: 1px solid rgb(97, 97, 97);
	border-radius: 10px;
}

@media (max-width:600px) {
	.sidenav {
		height: auto;
	}
	.content {
		height: auto;
	}
	.page {
		margin-bottom: 10px;
	}
}