.nav_area {
    float:none; clear:both;
    margin:0 auto; padding: 0;
    width:100%;
    height: 56px;
    font-family: 'Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ ProN', Meiryo, メイリオ, 'YuGothic', '游ゴシック', Helvetica, Arial, sans-serif;
    background-color: #000;
}

.nav_area {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    box-sizing: border-box;
    font-size:16px;
}

.nav_area ul {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav_area ul::after {
  display: block;
  clear: both;
  content: '';
}
.nav_area ul li {
  position: relative;
  float: left;
  border-left: 1px solid #fff;
  border-right: 1px solid #fff;
}

.nav_area ul > li {
  height: 56px;
  display: block;
  text-align: center;
}

.nav_area ul li:not(:first-child) {
  border-left: none;

}

.nav_area ul ul li:not(:first-child) {
  border-left: 1px solid #fff;
}

.nav_area ul li a:hover {
/*  filter:alpha(opacity=80);
  opacity: 0.80;
*/
  background-color: rgba(255,255,255,.3);
}

.nav_area ul li a ,
.nav_area li ul li a {
  display: inline-block;
  min-width:18em;
  max-width:20em;
  color: #fff;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
}

.nav_area ul li a {
  padding: 0 1em;
}

.nav_area > ul > li > a {
  padding: 1em .5em;
}

.nav_area li ul li a {
  padding: .1em;
}

.nav_area ul ul {
  position: absolute;
  top: 100%;
  left: -1px;
}
.nav_area ul ul li {
  float: none;
  margin: 0;
  background-color: #000;
  border: 1px solid #fff;
}
.nav_area ul ul li:not(:first-child) {
  border-top: none;
}
.nav_area ul ul ul {
  position: absolute;
  top: 0;
  left: 100%;
}
.nav_area ul ul ul li ,
.nav_area ul ul ul li:not(:first-child) {
  border-left: none;
}

.nav_area li ul {
  visibility: hidden;
}
.nav_area li:hover ul{
  visibility: visible;
}
.nav_area ul ul li{
  transform: rotateY(90deg);
  transform-origin: 50% 0;
  transition: .3s;
}

.nav_area li:hover li{
  transform: rotateY(0);
}
.nav_area ul ul li:nth-child(2) {
  transition-delay: .1s;
}
.nav_area ul ul li:nth-child(3) {
  transition-delay: .2s;
}
.nav_area ul ul li:nth-child(4) {
  transition-delay: .3s;
}
.nav_area ul ul li:nth-child(5) {
  transition-delay: .4s;
}
.nav_area ul ul li:nth-child(6) {
  transition-delay: .5s;
}
.nav_area ul ul li:nth-child(7) {
  transition-delay: .6s;
}
.nav_area ul ul li:nth-child(8) {
  transition-delay: .7s;
}
.nav_area ul ul li:nth-child(9) {
  transition-delay: .8s;
}
.nav_area ul ul li:nth-child(10) {
  transition-delay: .9s;
}
.nav_area ul ul li:nth-child(11) {
  transition-delay: 1.0s;
}
.nav_area ul ul li:nth-child(12) {
  transition-delay: 1.2s;
}
.nav_area ul ul li:nth-child(13) {
  transition-delay: 1.3s;
}
.nav_area ul ul li:nth-child(14) {
  transition-delay: 1.4s;
}
.nav_area ul ul li:nth-child(15) {
  transition-delay: 1.5s;
}
.nav_area ul ul li:nth-child(16) {
  transition-delay: 1.6s;
}
.nav_area ul ul li:nth-child(17) {
  transition-delay: 1.7s;
}

.sub_menu_top {
  background-color: #000;
}
.sub_menu ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.sub_menu ul li {
  position: relative;
  padding: 1em 2em;
  border-bottom: 1px dotted #ccc;
}
.sub_menu ul li::after,
.sub_menu ul li::before {
  display: block;
  content: '';
  position: absolute;
}
.sub_menu ul li::after {
  top: 1.2em;
  left: .5em;
  width: 14px;
  height: 14px;
  background-color: #000;
  border-radius: 100%;
}
.sub_menu ul li::before {
  z-index: 2;
  top: 1.5em;
  left: .8em;
  width: 4px;
  height: 4px;
  border-right: 1px solid #fff;
  border-bottom: 1px solid #fff;
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
}

.sub_menu ul li a {
  display: block;
  text-decoration: none;
  color: #333;
}

.sub_menu ul li:hover  {
  background-color: #f2f2f2;
}
.sub_menu ul li a:hover  {
  color: #333;
}