/*nav_top*/
.nav_top{width:100%; height:36px; line-height:36px; background-color:#555; overflow:hidden;}
.nav_top .constr{width: 1000px;margin: 0 auto;}
.nav_top .l a{display:inline-block; text-align:center; font-size:14px; color:#fff;}
.nav_top .l a:hover{color:#e74105;}
.nav_top span{color:#fff;}