.contents {
	margin-top: 50px;
}

.contents > p:first-child {
	font-weight: bold;
	text-align: center;
}

.grid {
	display: -webkit-box;
	display: -ms-flexbox;
	display: flex;
	-ms-flex-wrap: wrap;
	flex-wrap: wrap;
	margin-top: 30px;
}

.grid li {
	position: relative;
	width: 20%;
	height: 250px;
	padding: 6px;
	-webkit-transition: .6s all;
	transition: .6s all;
	overflow: hidden;
}

.grid li img {
	position: static;
	height: 100%;
	width: 100%;
	left: 0;
	-o-object-fit: cover;
	object-fit: cover;
	top: 0;
	-webkit-transform: none;
	transform: none;
	-webkit-transition: .3s all;
	transition: .3s all;
}

.grid li img:hover {
	opacity: .8;
	cursor: pointer;
}

.back_nottesite_button {
	display: block;
	width: 36%;
	max-width: 400px;
	padding: 1em;
	margin: 30px auto 0;
	color: #fff;
	text-align: center;
	background-color: #9ca2a2;
	border-radius: 10em;
}

.back_nottesite_button:hover {
	background-color: #c0c7c7;
}

@media screen and (max-width: 1024px) {
	.grid li {
		width: 25%;
		height: 200px;
	}
}

@media screen and (max-width: 768px) {
	.grid li {
		width: 33.333%;
		padding: 3px;
	}
}

@media screen and (max-width: 414px) {
	.grid li {
		height: 120px;
	}
}