* {margin: 0;padding: 0;  }
a {text-decoration: none;color: rgba(255,255,255,1);  }
ul, li {list-style: none;}
h1, h2, h3, h4, h5 {font-weight: bold;}
body {font-family:SourceHanSansCN; width: 1900px; margin: 0 auto;}
.clear {clear: both;}
.nav{
    width:100%;
    height:440px;
    background: url("../image/about_bg.jpg") no-repeat;
}
.nav-head{
    width: 1200px;
    margin:0 auto;
    height:66px;
    line-height: 60px;
}
@keyframes fade-in {
    0% {opacity: 0;}/*初始状态 透明度为0*/
    40% {opacity: .5;}/*过渡状态 透明度为0*/
    40% {opacity: .8;}/*过渡状态 透明度为0*/
    100% {opacity: 1;}/*结束状态 透明度为1*/
}
.nav-head-L{
    width: 50%;
    float: left;
}

.nav-head-L span{
    display: inline-block;
    font-weight: bold;
    color:#333333;
    margin-left:76px;
    font-size:24px;
    letter-spacing:2px;

}
.nav-head-R{
    width:50%;
    float: left;
    color:#333333;
}
.nav-head-R li{
    float: left;
    width: 120px;
    height: 63px;
    line-height: 63px;
    text-align: center;
    font-size: 14px;
    font-weight: 400;
}
.nav-head-R li a{
    color:#333333;
}
.nav-head-R .tit{
    color:#333333;
    font-size:16px;
    font-weight: bold;
}
.nav-center{
    width: 557px;
    margin: 90px 0 0 500px;
    color: #333333;
    text-align: center;
}
.nav-center h1{
    font-size:36px;
    color:rgba(51,51,51,1);
    line-height:54px;
}
.nav-center ul{
    margin-top: 30px;
    line-height: 33px;
}
/*导航结束*/
/*内容开始*/
.center{
    width:1200px;
    margin:0 auto;
    height:500px;
    text-align:center;
    padding-top:50px;
    position: relative;
}
.center h1{
    font-size:36px;
    color:rgba(51,51,51,1);
}

.center img{
    z-index: 2;
    position: absolute;
    left: 50px;
    top: 164px;
}

.bg-C{
    width:877px;
    height:224px;
    top: 306px;
    left: 200px;
    position: absolute;
    background:linear-gradient(90deg,rgba(178,173,183,0) 0%,rgba(122,117,129,1) 100%);
}
.bg-C p{
    width:422px;
    height:120px;
    font-size:20px;
    font-weight:bold;
    color:rgba(255,255,255,1);
    line-height:40px;
    float: right;
    text-align: left;
    z-index: 1;
    margin-right: 47px;
}
.center-li{
    width:1200px;
    margin:0 auto;
}
.center-li li{
    display: inline-block;
    width:142px;
    text-align: center;
    margin-left: 163px;
    margin-top: 50px;
    height:142px;
    line-height: 175px;
    border-radius: 100px;
    background:rgba(122,117,129,1);
}
.center-li li p{
    line-height: 17px;
}
.text{
    width:1200px;
    margin:114px auto;
}
.text p{
    height:90px;
    font-size:14px;
    font-weight:400;
    color:rgba(102,102,102,1);
    line-height:30px;
}

/*最底部*/
.minimum{
    width:100%;
    height:300px;
    text-align:center;
    background:rgba(122,117,129,1);
    font-size:18px;
    font-weight:400;
    color:rgba(255,255,255,1);
    line-height:40px;
}
.minimum-d{
    position: relative;
    top: 30%;
    margin:0 auto;
}
.minimum-d p{}