/*親メニュー*/

#head_menu {
  list-style-type: none;
  width: 966px;
  margin: 0 auto 0;
  padding: 0;
}

#head_menu li {
  position: relative;
  width: 161px;
  float: left;
  margin: 0;
  padding: 0;
  text-align: center;
}

#head_menu li a {
  display: block;
  position: relative;
  margin: 0;
  padding: 12px 0;
  background: #efefef;
  color: #003399;
  height:16px;/*追加*/
  background-image:url(../images/menu_bg_on.gif) ;
  background-position: left top;
  background-repeat: no-repeat;
  font-size: 14px;
  font-weight: bold;
  line-height: 1;
  text-decoration: none;
  border-top: 1px solid #d2d2d2;
  border-right: 1px solid #d2d2d2;
  border-bottom: 1px solid #d2d2d2;
}

/*子以下メニュー*/

#head_menu li ul {
  list-style: none;
  position: absolute;
  z-index: 100;
  top: 100%;
  left: 0;
  width: 100%;
  margin: 0;
  padding: 0;
}

#head_menu li ul li {
  overflow: hidden;
  width: 100%;
  height: 0;
  color: #fff;
  transition: .2s;
}

#head_menu li ul li a {
  padding: 13px 15px;
  text-align: left;
  font-size: 12px;
  font-weight: normal;
  background: #B9CFFF;
}

#head_menu li ul li a:hover {
  background: #69FFAA;
}

/*共通設定*/

#head_menu li:hover > ul > li {
  overflow: visible;
  height: 38px;
}

/*孫ひ孫メニュー*/

#head_menu li ul li ul {
  top: 0;
  left: 100%;
}

#head_menu li:last-child ul li ul {
  left: -100%;
  width: 100%;
}


#head_menu li ul li ul li a {  
  background: #99CCFF;
}
#head_menu li:hover ul li ul li:hover > a {
  background: #69FFAA;
}


/*　下の階層があることを示す矢印　*/

#head_menu li ul li ul:before {
  position: absolute;
  content: "";
  top: 13px;
  left: -10px;
  width: 0;
  height: 0;
  border: 5px solid transparent;
  border-left-color: #0066CC;
}

#head_menu li:last-child ul li ul:before {
  position: absolute;
  content: "";
  top: 12px;
  left: 200%;
  margin-left: -20px;
  border: 5px solid transparent;
  border-right-color: #0066CC;
}