.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-attachment: fixed;
	background-size: cover;
	background-position: center bottom 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: ikaros;
	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_history{
	border-bottom: 1px solid #d9d9d9;
	position: relative;
}
.a_history ._nav_seat{
	height: 125px;
}
.a_history ._nav{
	position: absolute;
	left: 0;
	top: 0;
	right: 0;
	z-index: 19;
	background-color: #fff;
	height: 125px;
}
.a_history ._nav._active{
	position: fixed;
}
.a_history ._nav ul{
	background-color: #fff;
	width: 70%;
	margin: 0 auto;
	padding: 40px 0 15px;
	border-bottom: 2px solid #e5e5e5;
	display: flex;
	align-items: center;
	justify-content: center;
	transition: width .4s;
}
.a_history ._nav._active ul{
	width: 80%;
}
.a_history ._nav ._arrow{
	flex: 1;
	text-align: center;
	height: 11px;
	overflow: hidden;
}
.a_history ._nav ._arrow img{
	height: 11px;
	display: block;
	margin: -12px auto 0;
}
.a_history ._nav ._arrow:nth-of-type(1) img{
	filter: drop-shadow(#568eb6 0 12px);
}
.a_history ._nav ._arrow:nth-of-type(2) img{
	filter: drop-shadow(#7d768f 0 12px);
}
.a_history ._nav ._arrow:nth-of-type(3) img{
	filter: drop-shadow(#a55f69 0 12px);
}
.a_history ._nav ._arrow:nth-of-type(4) img{
	filter: drop-shadow(#c84a46 0 12px);
}
.a_history ._nav a{
	display: block;
	white-space: nowrap;
	text-align: center;
	color: #6f6f6f;
}
.a_history ._nav a._active{
	color: #000;
}
.a_history ._nav a h4{
	font-size: 16px;
	margin: 0;
	line-height: 35px;
}
.a_history ._nav a._active h4{
	font-size: 20px;
}
.a_history ._nav a span{
	font-size: 16px;
	font-family: numfont;
	display: block;
	line-height: 35px;
}
.a_history ._nav a._active small{
	font-size: 16px;
}
.a_history ._nav a._active span{
	font-size: 21px;
}
.a_history ._list{
	width: 70%;
	margin: 0 auto;
	padding-top: 58px;
	padding-bottom: 50px;
}
.a_history ._list li{
	display: flex;
	margin-bottom: 35px;
}
.a_history ._list li ._year{
	display: flex;
	flex-direction: column;
	align-items: center;
	white-space: nowrap;
}
.a_history ._list li ._year h3{
	font-size: 28px;
	margin-top: 32px;
}
.a_history ._list li ._year>span{
	flex: 1;
	width: 1px;
	background-color: #e6e6e6;
	margin-top: 23px;
}
.a_history ._list li ._year i{
	margin-top: 23px;
	width: 20px;
	height: 20px;
	position: relative;
}
.a_history ._list li ._img{
	height: 300px;
	width: 36%;
	overflow: hidden;
	margin-left: 4%;
	margin-bottom: 60px;
	position: relative;
}
.a_history ._list li ._img img{
	height: 100%;
	min-width: 100%;
	max-width: none;
	position: absolute;
	left: 50%;
	top: 50%;
	transform:translate(-50%,-50%);
	-webkit-transform:translate(-50%,-50%);
	transition: transform 1s;
}
.a_history ._list li:hover ._img img{
	transform:translate(-50%,-50%) scale(1.1);
	-webkit-transform:translate(-50%,-50%) scale(1.1);
}
.a_history ._list li ._intro{
	flex: 1;
	width: 3%;
	margin-left: 3%;
	position: relative;
}
.a_history ._list li ._intro h3{
	font-size: 28px;
	width: 100%;
	padding: 16px 0 32px;
	border-bottom: 1px solid #e5e5e5;
}
.a_history ._list li ._intro ._content{
	font-size: 16px;
	line-height: 34px;
	/* height: 102px; */
	overflow: hidden;
	margin-top: 14px;
	margin-bottom: 48px;
	transition: height 1s .5s;
	-webkit-transition: height 1s .5s;
}
.a_history ._list li ._intro._active ._content{
	height: 100%;
}
.a_history ._list li ._intro ._button{
	display: none;
	position: absolute;
	left: 0;
	top: 245px;
	transition: transform 1s,opacity .6s;
	-webkit-transition: transform 1s,opacity .6s;
}
.a_history ._list li ._intro._active ._button{
	opacity: 0;
	height: 0;
	transform:translateX(60px);
	-webkit-transform:translateX(60px);
}
.a_history ._list li ._intro ._button a{
	font-size: 14px;
	display: inline-block;
	background-color: #28a7e1;
	color: #fff;
	padding: 10px 40px;
}