.main_head {
	margin: 0 auto;
	border-bottom: 1px solid #dcdcdc;
	width: 1400px;
}

.banner {
	position: relative;
	width: 100%;
	min-width: 1400px;
	height: 700px;
}

.banner.source {
	background: url("../images/source_head_img.jpg") center 0 no-repeat;
	background-size: 100% 100%;
}

.banner .bannerContent {
	position: relative;
	height: 100%;
}

.container {
	display: block;
	box-sizing: border-box;
	margin: 0 auto;
	padding-left: 10px;
	width: 65%;
	min-width: 1400px;
}

.head_font {
	position: absolute;
	top: 50%;
	padding-left: 0;
	transform: translateY(-50%);
}

.head_font .p1 {
	font-size: 34px;
	color: #fff;
}

.head_font .p1 .p1-sub {
	padding: 4px 8px;
	border-radius: 4px;
	background: #cee8f9;
	font-size: 18px;
	color: #353535;
}

.head_font .p2 {
	margin-top: 10px;
	font-size: 18px;
	color: #fff;
}

.intro {
	padding-bottom: 40px;
	text-align: center;
	font-size: 30px;
	color: #333;
	;
}

.intro .title {
	padding: 35px 0 25px;
}

.intro img {
	display: block;
	margin: 0 auto;
}

.intro-main {
	position: relative;
	margin: 0 auto;
	width: 1400px;
}

.intro-main img {
	width: 100%;
}

.intro-left img {
	position: absolute;
	left: 0;
	top: 20px;
	z-index: 2;
	width: 700px;
	height: 690px;
	opacity: 0;
	transition: opacity .8s ease;
}

.intro-left img.active {
	opacity: 1;
}

.intro-left {
	position: absolute;
	left: 0;
	top: 50px;
	z-index: 1;
	width: 700px;
}

.intro-right {
	position: absolute;
	right: 0;
	top: 35px;
	width: 700px;
	height: 675px;
}

.intro-right-box {
	position: relative;
	width: 100%;
	height: 100%;
}

.intro-btn {
	position: absolute;
	z-index: 3;
	cursor: pointer;
	text-align: center;
}

.intro-btn.active .sub-title {
	background: #1c70e6;
}

.sub-title {
	padding: 4px 16px;
	border-radius: 4px;
	background: #6b6b6b;
	font-size: 24px;
	color: #fff;
}

.intro-btn:first-of-type {
	left: 120px;
	top: 100px;
}

.intro-btn:nth-of-type(2) {
	left: 310px;
	top: 220px;
}

.intro-btn:nth-of-type(3) {
	left: 30px;
	bottom: 60px;
}
.intro-btn:nth-of-type(4) {
	left: 280px;
	bottom: 80px;
}
.intro-btn:nth-of-type(5) {
	left: -40px;
	top: 215px;
}
.intro-btn:nth-of-type(6) {
	left: 480px;
	bottom: 180px;
}

.btn-img.no-active {
	display: block;
}

.btn-img.active {
	display: none;
}

.intro-btn.active .btn-img.no-active {
	display: none;
}

.intro-btn.active .btn-img.active {
	display: block;
}

.intro-btn .btn-img {
	width: 180px;
}

.advantage-box {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	margin: 0 auto;
	width: 1240px;

	gap: 70px 90px;
}
.advantage-item {
	position: relative;
	box-sizing: border-box;
	padding: 30px 35px;
	border: 2px solid #fff;
	border-radius: 24px;
	width: 322px;
	height: 310px;
	background: linear-gradient(to bottom,#e7f3ff,#f2faff);
	box-shadow: 0 0 4px 1px #dad5d5;
	cursor: pointer;
	text-align: justify;
	font-size: 16px;
	color: #474747;
}
.advantage-item .icon {
	position: absolute;
	left: 20px;
	top: 20px;
	z-index: 3;
	border-radius: 50%;
	width: 88px;
	height: 88px;
}
.advantage-item .head-title {
	margin-bottom: 40px;
	padding-left: 100px;
	padding-top: 10px;
	font-size: 18px;
	color: #000;
}