@media screen and (max-width: 1000px){
	body .nav_center_fixed{padding: 0 10px;}
	body .nav_center_fixed .box_center .menu_item .menu_title .son_btn i{right: 10px;}
	body .nav_center_fixed .box_top:before{width: calc( 100% + 20px );left: -10px;}
        body .nav_center_fixed .box_center .menu_item .menu_title .son_btn{width: 100%;}
}