.header{
	width: 70vw;
	height: 4rem;
	min-width: 800px;
	margin: auto;
}

.logo{
	height: 3.6rem;
}

.nav ul li{
	list-style-type: none;
	display: inline;
}

.nav a{
	display:inline-table;
	text-decoration:none;
	color: #fff;
	height: 3.8rem;
	padding: 1em;
}

.a-bg{
	background: var(--second-color);
}

.nav a:hover{
	color: #ff0;
}
.nav .select{
	font-weight: bold;
	color: #ff0;
}