body{ background:#FFFFFF; font-family: 黑体, 微软雅黑; font-size:18px; padding:0px; margin:0px; color: #333;}
ul,li{padding:0; margin:0; list-style-type:none;}
a{text-decoration:none;}
img{border:0;}

.top {width: 100%; height: 50px; background: #f4f4f4; font-size: 24px; line-height: 50px;}
.top .zi {width: 987px; margin: 0 auto; padding-left: 13px;}
.banner {width: 100%; height: 425px; background: #d9d9d9 url("../img/banner.jpg") no-repeat center;}
.banner img {width: 1240px; height: 425px; margin: 0 auto;}
.nav {width: 100%; height: 59px; background: #222 url("../img/nav.jpg") no-repeat center; font-size: 24px; font-weight: bold;}
.nav .name ul{width: 1038px; margin: 0 auto;}
.nav .name ul li a {color: #fff; float: left; margin: 0 44px; margin-top: 16px;}

.first {width: 1000px; margin: 0 auto; padding-top: 53px; padding-bottom: 46px;}
.title img {margin: 0 auto; display: block; margin-bottom: 33px;}

.second {width: 100%; background: #f4f4f4; padding-top: 53px; padding-bottom: 46px;}
.letter {width: 1000px; margin: 0 auto;}

.third {width: 1000px; background: url("../img/color.gif") no-repeat 532px 357px; position: relative;}
.advantage {width: 1000px; margin-top: 30px;}
.advantage .adv1 {width: 934px; margin: 2px auto; padding-left: 50px; font-family: 微软雅黑; line-height: 30px;}
.advantage .adv1 img {margin-top: 14px;}
.div {width: 100px; height: 100px; border-radius: 50px; position: absolute;}
.div1 {top: 520px; left: 578px;}
.div2 {top: 542px; left: 718px;}
.div3 {top: 450px; left: 810px;}

.fourth {width: 1000px; background: #f4f4f4; margin: 0 auto; display: table;}
.card img {float: left; margin: 10px 20px 20px 20px;}

.fifth {width: 1000px; height: 400px; margin: 0 auto; background: url("../img/title4-1.gif") no-repeat center 46px;}
.fifth .zi1 {width: 480px; line-height: 48px; margin-top: 150px; margin-left: 30px; float: left; font-size: 28px; color: #000;}
.fifth .join {width: 430px; height: 336px; float: left; margin-top: 135px; margin-left: 30px;}

.to-top {width: 50px; height:50px; position: fixed; right: 0; bottom: 100px;}