header nav {
	background-color: #e5f6ff;
}
header nav > ol {
	display: flex;
	width: 1024px;
	margin: auto;
}
header nav > ol > li {
	position: relative;
	width: 20%;
}
header nav > ol > li:nth-child(n + 2) {
	border-left: 1px solid #fff;
}
header nav > ol > li > a {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 100%;
	height: 50px;
	background-color: #afcffa;
}
header nav > ol > li > ol {
	position: absolute;
	left: 0;
	top: 100%;
	display: none;
	width: 100%;
}
header nav > ol > li > ol li a {
	display: block;
	padding: 10px;
	border-top: 1px solid #fff;
	background-color: #627899;
	color: #fff !important;
}
header nav > ol > li > ol li a:hover {
	opacity: 0.8;
}
header nav > ol > li:hover > ol {
	display: block;
}