div.header_menu {
 width: 800px; height: 100px; background-image: url(//www.motocorse.jp/img/top_back.jpg); background-repeat: no-repeat;}

 div.header_menu li {
 float: right; border-left: dotted 1px #ccc; padding-left: 10px; margin-right: 12px; list-style: none; font-size: 10px; margin-top: 80px; }

 div.header_menu li a {
 color: #fff; text-decoration: none;}

 div.header_menu li a:hover {
 color: #ccc; text-decoration: underline;
 }