*{font-family: arial;box-sizing: border-box;}
/*地图导航样式*/
.pro_nav_1 {display: flex;justify-content: space-between;background-color: #fff;margin-top:10px;flex-wrap: nowrap;width: 935px;}
.pro_nav_1 > div {background-color: #666;height: 22px;margin-bottom: 10px;text-align: center;line-height: 22px;font-size: 13px;color: #fff;}
.pro_nav_1 span{padding-left:4px;padding-right:4px;font-size: 12px;}
.pro_nav_2 {display: flex;justify-content: space-between;background-color: #fff;margin:0;flex-wrap: nowrap;width: 935px;}
.pro_nav_2 > div {background-color: #666;height: 22px;/*padding:0 3px;*/margin-bottom: 10px;text-align: center;line-height: 22px;font-size: 13px;color: #fff;}
.pro_nav_2 span{padding-left:3px;padding-right:3px;font-size: 12px;}
.pro_nav_3 {display: flex;justify-content: space-between;background-color: #fff;margin:0;flex-wrap: nowrap;width: 935px;}
.pro_nav_3 > div {background: #f2f2f2;height: 22px;/*padding:0 3px;*/margin-bottom: 10px;text-align: center;line-height: 22px;font-size: 13px;color: #333;}
.pro_nav_3 span{padding-left:131px;padding-right:131px;font-size: 12px;}
.pro_nav a{display: block;color: #fff;padding: 0;}
.pro_nav a:hover{/*border-bottom: 2px solid #d7000f;background-color: #666;*/background: url(//img.asianmetal.com/i/abtn01.png) repeat left;}
.pro_nav_on{background: url(//img.asianmetal.com/i/abtn01.png) repeat left;}
.pro_nav_3 a{display: block;color: #333;}
.pro_nav_3 a:hover{color: #fff;background:#f2f2f2  url(//img.asianmetal.com/i/abtn01.png) repeat left;}
.pro_nav_3_on a{display: block;color: #fff;padding: 0;color: #fff;background: url(//img.asianmetal.com/i/abtn01.png) repeat left;}