@media (min-width: 992px) and (max-width: 1600px) {
	.thirds {
		display: none;
	}
}

@media (min-width: 1401px) {

	.thirds {
		display: none;
	}
}

/* @media (max-width: 1199.98px) {

	.fir_center .fir_quest {
		margin: 0px 20px;
	}

	.fir_center .fir_desc {
		margin: 0px 10px;
	}

} */

@media (max-width: 991.98px) {

	/* 中间 center */

	/* 第二页 */
	.second .sec_tit {
		margin: 0px 20px;
		padding-top: 50px;
	}

	.second .sec_desc {
		margin: 0px 10px;
	}

	/* 第三页 */
	.third {
		display: none;
	}

	.thirds {
		display: block;
	}

	.thirds {
		display: flex;
		justify-content: center;
		flex-direction: row;
		flex-wrap: wrap;
	}

	.thirds .third_cont {
		display: flex;
		flex-direction: column;
		justify-content: center;
		align-items: center;
		padding: 30px;
		margin: 15px;
		width: 331px;
		height: 305px;
		background: #008d4f;
	}

	.thirds .third_cont .third_num {
		font-size: 70px;
		font-family: DINAlternate;
		font-weight: bold;
		color: #FFFFFF;
		display: flex;
		align-items: center;
	}

	.thirds .third_cont .third_num .symbol {
		font-size: 50px;
	}

	.thirds .third_cont .third_descs {
		margin-top: 30px;
		font-size: 20px;
		font-family: PingFang SC;
		font-weight: 400;
		color: #FFFFFF;
	}

	/* 第四页 */

	.fourth .fou_tit {
		margin-top: 34px;
		margin-bottom: 27px;
	}

	.fourth .fou_desc {
		margin: 30px;
	}

	.fourth .fou_img .fimg {
		border-radius: 0px;
		margin-bottom: 30px;
		width: 60%;
		height: auto;
	}

	.fou_img {
		display: flex;
		flex-wrap: wrap;
		justify-content: center;
	}

}

/* 3. Medium devices (less than  768px) */

@media (max-width: 767.98px) {


	.foo_img .logo_imgb {
		width: 50% !important;
	}

	.footer_rig .input {
		width: 90% !important;
	}

	.footer_rig .button {
		width: 50% !important;
	}

	.thirds {
		justify-content: space-around;
	}

	.thirds .third_cont {
		width: 40%;
		height: auto;
		margin: 0 5% 20px;
	}

	.thirds .third_cont .third_num {
		font-size: 43px;
	}

	.thirds .third_cont .third_num .symbol {
		font-size: 39px;
	}

	.thirds .third_cont .third_descs {
		font-size: 13px;
	}

}