/*898B8D*/
center {
	font-size: .16rem;
	margin-bottom: .8rem;
}
.top-banner {
	margin-top: 0;
	padding: 0 12.5%;
	box-sizing: border-box;
	height: 480px;
	background-color: rgba(0, 0, 0, .25);
	position: relative;
	overflow: hidden;
	background-repeat: no-repeat;
	background-size: cover;
	background-position: center;
}
.about-banner {
	background-image: url(../images/banner-about.jpg);
}
.news-banner {
	background-image: url(../images/banner-news.jpg);
}
.banner-product {
	background-image: url(../images/banner-product.jpg);
}
.banner-adv {
	background-image: url(../images/banner-adv.jpg);
}
.contact-banner {
	background-image: url(../images/banner-contact.jpg);
}
.banner-quality {
	background-image: url(../images/banner-quality.jpg);
}
.banner-research {
	background-image: url(../images/banner-research.jpg);
}
.top-banner-title {
	font-size: .36rem;
	color: #fff;
	font-family: ITC Avant Garde Gothic LT Book;
	text-transform: uppercase;
	line-height: .6rem;
}
.top-banner-subtitle {
	margin-bottom: .25rem;
	font-size: .14rem;
	color: #fff;
	line-height: .45rem;
}
/*按钮*/
.button {
    margin-top: .34rem;
    font-size: .16rem;
    width: 2.3rem; height: .42rem;
    line-height: .42rem;
    text-align: center;
    display: block;
    border-radius: .18rem;
    color: #fff;
    transition: all .4s ease-in-out;
    background-color: var(--mainColor);
    box-shadow: -.06rem 0 .15rem rgba(0, 0, 0, .2);
    border: 1px solid transparent;
    text-transform: uppercase;
}
.button:hover {
    border: 1px solid #fff;
}
.top-banner .top-index {
	display: inline-block;
	position: absolute;
	top: 50%; right: 16%;
	text-align: left;
}
.top-banner .banner-text {
	top: 50%;
	position: relative;
	transform: translateY(-50%);
	text-align: center;
	text-shadow: 1px 1px #000;
	font-size: .45rem;
	line-height: 1;
}
.top-banner .title {
	font-family: ITC Avant Garde Gothic LT Book;
	font-size: .48rem;
	color: #fff;
	font-weight: bold;
	text-transform: uppercase;
	letter-spacing: 1px;
}
.top-banner .subtitle  {
	margin: .28rem 0;
	font-size: .14rem;
	color: #fff;
}
.top-banner .button {
	margin: 0 auto;
}
/*面包屑*/
.nav {
	font-size: .14rem;
	text-align: center;
	height: .5rem;
	line-height: .5rem;
	color: #fff;
	background-color: rgba(0, 0, 0, .4);
	position: relative;
	top: -.5rem;
	z-index: 1;
}
.nav a {
	color: #fff;
}
.nav .iconfont {
	font-size: .14rem;
}
.nav span {
	padding-left: .26rem;
	box-sizing: border-box;
	margin: 0 auto;
	width: 12.8rem;
	display: block;
	text-align: left;
}

@media screen and (max-width: 768px) {
.top-banner {
	height: 3rem;
}
.top-banner .banner-text {
	top: 55%;
}
.top-banner .title {
	font-size: .3rem;
}
.top-banner .subtitle {
	margin: .2rem 0;
	line-height: 1.4;
}
.top-banner .button {
	width: 1.6rem;
}
.about-banner {
	background-position: right;
}

}