*{padding:0;margin:0;box-sizing:border-box}a{text-decoration:none;color:#000}.w1200{width:1200px;margin:0 auto}.tyzx_box{width:100%;height:285px;background:url(tyzx_back.png);background-position:center;background-size:cover;background-repeat:no-repeat;overflow:hidden}.tyzx_box .tyzx_logo{margin-top:96px;margin-left:10px;width:480px}.tyzx_nav{width:100%;height:64px;background:#4472c4;overflow:hidden}.tyzx_nav ul{list-style:none;overflow:hidden;float:left;width:940px}.tyzx_nav ul li{float:left;height:64px;line-height:64px;padding:0 20px}.tyzx_nav ul li:hover{background:#61AAFF}.tyzx_nav ul li a{font-size:18px;color:#fff;font-weight:600}.tyzx_nav ul .active{background:#61AAFF}.tyzx_nav .head_slogan{float:right;margin-top:16px;width:249px;position:relative}.tyzx_nav .head_slogan input{width:249px;height:32px;padding-right:35px;border:0;padding-left:16px;outline:none;border-radius:6px 6px 6px 6px}.tyzx_nav .head_slogan .searchbtn{position:absolute;top:4.5px;right:9px}