/* 原理 */
.theory-container {
	overflow: hidden;
	background-color: #F3F3F3;
}

.theory-content {
	max-width: 1200px;
	margin: 0 auto;
}

.theory-content .grid {
	display: grid;
}

.theory-content .grid-item {
	background-color: white;
}

.theory-content .grid-item .img {
	display: block;
	max-width: 100%;
	margin: 0 auto;
}

.theory-content .grid-item .label {
	margin: 0;
	color: #222222;
}

@media screen and (max-width: 1023px) {
	.theory-container {
		padding: 40px 10px;
	}

	.theory-content .grid {
		grid-template-columns: repeat(3, 1fr);
		column-gap: 18px;
		margin-top: 40px;
	}

	.theory-content .grid-item + .grid-item {
		margin-top: 0;
	}
	
	.theory-content .grid-item .label {
		font-size: 16px;
		padding: 20px 10px;
	}
}

@media screen and (max-width: 500px) {
	.theory-content .grid {
		grid-template-columns: repeat(2, 1fr);
		row-gap: 20px;
	}
}

@media screen and (min-width: 1024px) {
	.theory-container {
		padding: 110px 20px 120px;
	}

	.theory-content .grid {
		grid-template-columns: repeat(3, 1fr);
		column-gap: 25px;
		margin-top: 70px;
	}
	
	.theory-content .grid-item .label {
		font-size: 19px;
		padding: 26px 12px;
	}
}