.maindesign .insert_container {
	margin: 30px 0;
}
.maindesign .material_container {
	width: 100%;
}
.maindesign .material_container img,
.maindesign .material_container video{
	width: 100%;
	height: auto;
}

@media screen and (max-width:767px) {
	.maindesign .insert_container {
		margin: 15px 0;
	}
}