.nav_hd {height: 112px;line-height: 112px;background: #282F9D;text-indent: 25px;color: #fff;font-size: 18px;border-bottom: 2px solid #fff;border-radius: 0 20px 0 20px;}

@media only screen and (max-width:1024px){
     .nav_hd {
    height: 50px;
    line-height: 50px;
    background: none;
    margin: 16px 0;
    text-indent: 0;
    border-radius: 0;
	width: 100%;
	border-bottom: 2px solid #e5e5e5;
  }
  .nav_hd  span{ 
    display: inline-block;
    height: 50px;
    line-height: 50px;
    background: none;
    color:  #282F9D;
    font-size: 24px;
    position: relative;
  }

  .nav_hd span::after {
    display: inline-block;
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    height: 4px;
    width: 100%;
    background-color:  #f18c00;
  }
}