.top {width:1100px; height:auto; overflow:hidden; margin:0 auto; background:#efefef}
.nav {width:1100px; height:auto; overflow:hidden; margin:0 auto; background:#00516d}
.nav ul {width:100%; height:auto; overflow:hidden}
.nav ul li {width:127.5px; height:40px; line-height:40px;background:url(../images/f_line.png) no-repeat right; text-align:center; margin-left:10px}
.nav ul li a {color:#fff;  display:block; margin-right:20px}
.banner {width:1100px; height:auto; margin:0 auto}

.title {width:1100px; height:36px; background:url(../images/title.png) no-repeat; margin:0 auto; margin-top:10px}
.title.four {background-position:0 0}
.title.gaoceng {background-position:0 -36px}
.title.video {background-position:0 -72px}
.title.human {background-position:0 -108px}
.title.horn {background-position:0 -144px}
.title.porduct {background-position:0 -180px}
.title.qudao {background-position:0 -216px}
.title.contact {background-position:0 -252px}

.box {width:1100px; height:auto; background:#efefef; margin:0 auto; overflow:hidden; position:relative}
.box .wenzi {position:absolute; top:72px; right:30px}

.h_box,.h_box ul {width:1100px; height:auto; overflow:hidden; margin:0 auto}
.h_box ul li {margin-bottom:13px}
.h_box .mr13 {margin-right:13px}
.h_box .mr16 {margin-right:16.25px}