html {
	margin: 0 auto;
}

a {
	text-decoration: none;
	color: black;
}

/* 设置背景颜色 */
body {
	background-color: darkgray;
}

/* 设置最近作品表格样式 */
dl {
	float: left;
	width: 25%;
}

nav {
	position: fixed;
	text-align: center;
	background-color: white;
	border-radius: 15px;
	margin-left: 100px;
}

a {
	text-decoration: none;
	color: black;
}

body {
	background-color: grey;
}

.nava:hover {
	background-color: gold;
	border-radius: 15px;
}

.nava_selected {
	background-color: gold;
	border-radius: 15px;
}

img {
	float: left;
	border-radius: 15px;
}

footer {
	text-align: center;
}

dd {
	float: inline-start;

}