.div_main_menu {
  z-index: 999;
  box-sizing: border-box;
  -webkit-transition: all 2s;
  -o-transition: all 2s;
  transition: all 2s;
  padding-top: .25vh;
  text-align: center;
  display: block;
  clear: both;
}

@media screen and (max-aspect-ratio: 16/9) {
  .div_main_menu {
    height: 4.5vw;
  }
}

@media screen and (max-aspect-ratio: 1/1) {
  .div_main_menu {
    width: 100%;
    padding-top: 4vh;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .div_main_menu {
    top: 11vw;
  }
}

.main_menu_container {
  display: inline-block;
}

@media screen and (max-aspect-ratio: 1/1) {
  .main_menu_container {
    display: block;
    width: 50vh;
    margin: auto;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .main_menu_container {
    width: 88.88vw;
    margin: auto;
  }
}

.menu__li {
  float: left;
  margin: 0.25vh 0.25vh;
  display: inline-block;
}

@media screen and (max-aspect-ratio: 16/9) {
  .menu__li {
    margin: 0.15vw 0.15vw;
  }
}

@media screen and (max-aspect-ratio: 1/1) {
  .menu__li {
    width: 100%;
    margin: .3vh 0;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .menu__li {
    margin: .5vw 0;
  }
}

.menu__a, .menu__ab {
  display: block;
  text-decoration: none;
  font-size: 3.5vh;
  padding: .8vh;
  border-radius: .7vw;
  box-shadow: .21vw .21vw .9vw #444;
  -webkit-transition: all .3s;
  -o-transition: all .3s;
  transition: all .3s;
  text-align: center;
  line-height: 5vh;
}

@media screen and (max-aspect-ratio: 16/9) {
  .menu__a, .menu__ab {
    font-size: 2vw;
    line-height: 2.8vw;
  }
}

@media screen and (max-aspect-ratio: 1/1) {
  .menu__a {
    font-size: 3.5vh;
    line-height: 5vh;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .menu__a {
    font-size: 6.2vw;
    line-height: 8.9vw;
  }
}

@media screen and (max-aspect-ratio: 1/1) {
  .menu__ab {
    display: none;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .menu__ab {
    display: none;
  }
}

.menu__div_a {
  padding: 2vh;
  z-index: 998;
  font-size: 10vh;
  position: fixed;
  top: .8vh;
  left: .8vh;
  box-sizing: border-box;
  line-height: 10vh;
  border-radius: 1.4vw;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: .21vw .21vw .9vw #444;
  color: #000;
  display: none;
}

@media screen and (max-aspect-ratio: 1/1) {
  .menu__div_a {
    display: block;
    font-size: 5.2vh;
    line-height: 5.2vh;
    padding: .9vh;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .menu__div_a {
    font-size: 10vw;
    line-height: 10vw;
    padding: 1.6vw;
  }
}

.menu__div_ab {
  padding: 2vh;
  z-index: 998;
  font-size: 10vh;
  position: fixed;
  top: .8vh;
  right: .8vh;
  box-sizing: border-box;
  line-height: 10vh;
  border-radius: 1.4vw;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: .21vw .21vw .9vw #444;
  color: #000;
  display: none;
}

@media screen and (max-aspect-ratio: 1/1) {
  .menu__div_ab {
    display: block;
    font-size: 5.2vh;
    line-height: 5.2vh;
    padding: .9vh;
  }
}

@media screen and (max-aspect-ratio: 9/16) {
  .menu__div_ab {
    font-size: 10vw;
    line-height: 10vw;
    padding: 1.6vw;
  }
}