.a_banner{
	height: 100vh;
	position: relative;
}
.a_banner ._banner{
	height: 100%;
	position: relative;
}
.a_banner .swiper-wrapper{
	height: 100%;
}
.a_banner .swiper-slide{
	display: flex;
	align-items: center;
	height: 100%;
	position: relative;
	overflow: hidden;
	pointer-events:none;
}
.a_banner ._background{
	background-size: cover;
	background-position: center 0;
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	z-index: 0;
}
.a_banner ._ad{
	color: #fff;
	position: relative;
	display: flex;
	flex-direction: column;
	align-items: center;
	width: 100%;
	white-space:nowrap;
}
.a_banner ._ad ._subtitle{
	font-size: 55px;
	font-family: wavehaus;
	margin-bottom: 4px;
}
.a_banner ._ad ._title{
	font-size: 55px;
	font-weight: 600;
	letter-spacing: 10px;
	margin-bottom: 60px;
}
.a_banner ._nav{
	position: absolute;
	left: 0;
	right: 0;
	bottom: 2vh;
	z-index: 10;
	display: flex;
	align-items: flex-start;
	justify-content: center;
}
.a_banner ._nav a{
	font-size: 17px;
	color: #fff;
	text-align: center;
}
.a_banner ._nav a span{
	display: block;
	padding: 0 32px;
	line-height: 1;
	margin-bottom: 12px;
}
.a_banner ._nav ._vertical{
	height: 17px;
	width: 1;
	border-left: 1px solid rgba(255,255,255,.3);
}
.a_banner ._nav a i{
	display: block;
	width: 0;
	height: 1px;
	background-color: #fff;
	margin: 0 auto;
	transition: width .4s;
}
.a_banner ._nav a:hover i,.a_banner ._nav a._active i{
	width: 58%;
}

.a_banner_2{
	height: 100vh;
	position: relative;
}
.a_banner_2 ._banner{
	height: 100%;
	position: relative;
}
.a_banner_2 .swiper-wrapper{
	height: 100%;
}
.a_banner_2 .swiper-slide{
	background-size: cover;
	background-position: center bottom;
	display: flex;
	align-items: center;
	height: 100%;
	position: relative;
	background-color: #e8e8e8;
}
.a_banner_2 ._background{
	background-size: cover;
	background-position: center 0;
	position: absolute;
	left: 0;
	right: 0;
	top: 0;
	bottom: 0;
	z-index: 0;
}
.a_banner_2 ._prospect{
	position: absolute;
	top: 50%;
	right: 0;
	width: 50%;
	max-width: 1000px;
	min-width: 600px;
	z-index: 1;
}
.a_banner_2 ._prospect{
	transform:translateY(-70%);
	-webkit-transform:translateY(-70%);
}
.a_banner_2 ._ad{
	color: #fff;
	position: relative;
	display: flex;
	flex-direction: column;
	margin-left: 9%;
	margin-bottom: 30vh;
	z-index: 2;
}
.a_banner_2 ._ad ._title{
	font-size: 40px;
	font-weight: 600;
	margin-bottom: 20px;
	white-space:nowrap;
}
.a_banner_2 ._ad ._subtitle{
	font-size: 33px;
}
.a_banner_2 ._ad ._subtitle p{
	white-space:nowrap;
}
.a_banner_2 ._nav{
	position: absolute;
	left:0;
	right:0;
	bottom: 8vh;
	z-index: 10;
}
.a_banner_2 ._nav ul{
	display: flex;
}
.a_banner_2 ._nav a{
	flex: 1;
	background: url(../../img/about/culture_nav_2.png) top right;
	background-size: cover;
	height: 26vh;
	padding-left: 3.5%;
}
.a_banner_2 ._nav a._active{
	border-bottom: 4px solid #28a7e1;
	background: url(../../img/about/culture_nav_1.png) top right;
}
.a_banner_2 ._nav a+a{
	margin-left: 1px;
}
.a_banner_2 ._nav a small{
	color: #c8c8c8;
	display: block;
	margin: 5.5vh 0 0;
}
.a_banner_2 ._nav a._active small{
	color: #757575;
}
.a_banner_2 ._nav a h4{
	font-size: 21px;
	margin: 1vh 0 0;
	color: #717171;
}
.a_banner_2 ._nav a._active h4{
	color: #000;
}
.a_banner_2 ._nav a i{
	display: block;
	margin: 6.5vh 0 0;
}
.a_banner_2 ._nav a i img{
	height: 30px;
	opacity: .7;
}
.a_banner_2 ._nav a._active i img{
	opacity: 1;
}