.nav-choice {
	border-bottom: solid 1px #ccc;
}
.nav-choice a {
	display: block;
	padding: 6px;
	box-sizing: border-box;
	width: 100%;
	height: 100%;
	color: #00bf00;
	font-size: 16px;
	text-decoration: none;
}

.flex-section {
	display: none;
}
.not-flex-section {
	display: block;
}
@supports (display: flex) {
	.flex-section {
		display: block;
	}
	.not-flex-section {
		display: none;
	}
}