.head{width: 100%;}
.head_cn{width: 1200px;padding:0px 1%;margin:0px auto;height: 104px;}
.head_cn .logo{display: block;width: 200px;height: auto;float: left;position: relative;top:22px;left: 0px;}
.head_cn .head_search{float: right;width: 250px;height: 52px;overflow: hidden;position: relative;top:26px;right: 0px;}
.head_cn .keyword{width: 180px;float: left;border: 1px solid #efefef;height: 50px;line-height: 50px;border-bottom-left-radius: 40px;border-top-left-radius: 40px;padding-left: 18px;font-size: 14px;color: #bfbfbf}
.search_btn{float: left;width: 50px;border: none;height: 52px;cursor: pointer;border-bottom-right-radius: 40px;border-top-right-radius: 40px;}
.head_cn .head_nav{width: 726px;margin:0px auto;height: 104px;border-left: 1px solid #e6e6e6;margin-left: 16px;float: left;}
.head_cn .head_nav ul li{float: left;width: 144px;height: auto;border-right: 1px solid #e6e6e6;}