/*nav导航盒子*/
nav{width: 900px;height: 45px;line-height: 45px;/*导航位置*/margin: 0 auto;text-align: center;font-size: 16px;position: relative;}
/*nav-main*/
.nav-main{width: 100%;height: 100%;list-style-type: none; margin:0 10px;}
.nav-main span{display: inline-block;margin-left: 18px;width: 7px;height: 7px;background: url('../img/down-icon.png') no-repeat;}
/*图标向上旋转*/
.hover-up{transform: rotate(180deg);-webkit-transform: rotate(180deg);-webkit-transition:all 0.2s ease-in-out;}
/*图标向下旋转*/
.hover-down{transform: rotate(0deg);-webkit-transform: rotate(0deg);-webkit-transition:all 0.2s ease-in-out;}
/*导航条设置*/
.nav-main>li,.nav-main>li a{width: 120px;height: 100%;display: block;float: left;color: #333333;margin-right: 1px;cursor: pointer;display:block;}
.nav-main>li a:hover,.nav-main>li:hover{background: #e71e30;color: #fff;display:block;text-decoration: none;}
/*隐藏盒子设置*/
.hidden-box{width: 118px;border: 1px solid #e0e0e0;border-top: 0;position: absolute;display: none;top: 45px;z-index:9999;}
.hidden-box>ul{list-style-type: none;color: #333333;cursor: pointer;}
.hidden-box li,.hidden-box li a{background:#fff;color: #333333; font-size:15px;}
.hidden-box li a:hover{background: #e71e30;color: #fff;display:block;text-decoration: none;}
/*隐藏盒子位置设置*/
.hidden-loc-about{left: 131px;}
.hidden-loc-case{left:373px;}
.hidden-loc-fangan{left: 494px;}
.hidden-loc-service{left: 615px;}