body {
	margin: 0;
}
img {
	width: 100%;
	height: auto;
	vertical-align: top;
}

.images_contents {
	max-width: 728px;
	margin: 0 auto;
	padding: 20px;
	background: #f2f2f2;
}
.images_title {
	font-weight: bold;
}
.hover_image_wrap {
	display: flex;
	justify-content: space-between;
	margin: 1em 0 0;
}
.hover_image {
	width: 24%;
	margin: 0;
}
.copyright {
	text-align: center;
	padding-top: 2em;
	font-size: 14px;
}
@media screen and (max-width: 640px) {
	.hover_image_wrap {
		flex-wrap: wrap;
	}
	.hover_image {
		width: 100%;
		margin: 0 0 10px;
	}
	.hover_image:last-child {
		margin: 0;
	}
}