<div class="container">
  <div class="nav">
    <ul>
      <li>STYLE 1
        <ul class="drop-menu menu-1">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
      <li>STYLE 2
        <ul class="drop-menu menu-2">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
      <li>STYLE 3
        <ul class="drop-menu menu-3">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
      <li>STYLE 4
        <ul class="drop-menu menu-4">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
    </ul>
  </div>
</div>
<div class="container">
  <div class="nav">
    <ul>
      <li>STYLE 5
        <ul class="drop-menu menu-5">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
      <li>STYLE 6
        <ul class="drop-menu menu-6">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
      <li>STYLE 7
        <ul class="drop-menu menu-7">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
      <li>STYLE 8
        <ul class="drop-menu menu-8">
          <li>ONE</li>
          <li>TWO</li>
          <li>THREE</li>
          <li>FOUR</li>
          <li>FIVE</li>
          <li>SIX</li>
        </ul>
      </li>
    </ul>
  </div>
</div>

html, body {
  padding: 0;
  margin: 0;
  background-color: #1D1F21;
  font-family: sans-serif;
}

ul {
  list-style: none;
}

.container {
  background-color: #47484B;
  width: 600px;
  height: 450px;
  margin: 50px auto;
  border: 1px solid #333;
  border-radius: 4px;
  position: relative;
}

.nav {
  display: inline-block;
  padding: 50px;
  text-align: center;
  margin: 0px 10px;
  position: absolute;
}
.nav li:hover {
  background: #4fa9d8;
}
.nav > ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: inline-block;
  background: #3B95C4;
  border-radius: 5px;
  color: rgba(255, 255, 255, 0.7);
}
.nav > ul > li {
  float: left;
  width: 120px;
  height: 50px;
  line-height: 50px;
  position: relative;
  font-size: 14px;
  cursor: pointer;
}

ul.drop-menu {
  position: absolute;
  top: 100%;
  left: 0%;
  width: 100%;
  padding: 0;
}
ul.drop-menu li {
  background: #318bba;
}
ul.drop-menu li:hover {
  background: #459fce;
}
ul.drop-menu li:first-child {
  border-radius: 2px 2px 0 0;
}
ul.drop-menu li:last-child {
  border-radius: 0 0 5px 5px;
}

ul.drop-menu li {
  display: none;
}

li:hover > ul.drop-menu li {
  display: block;
}

li:hover > ul.drop-menu.menu-1 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-1 li {
  transform-origin: top left;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-1 li:nth-child(1) {
  animation-name: menu-1;
  animation-duration: 300ms;
  animation-delay: -150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-1 li:nth-child(2) {
  animation-name: menu-1;
  animation-duration: 300ms;
  animation-delay: 0ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-1 li:nth-child(3) {
  animation-name: menu-1;
  animation-duration: 300ms;
  animation-delay: 150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-1 li:nth-child(4) {
  animation-name: menu-1;
  animation-duration: 300ms;
  animation-delay: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-1 li:nth-child(5) {
  animation-name: menu-1;
  animation-duration: 300ms;
  animation-delay: 450ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-1 li:nth-child(6) {
  animation-name: menu-1;
  animation-duration: 300ms;
  animation-delay: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-1 {
  0% {
    opacity: 0;
    transform: rotateZ(90deg);
  }
  70% {
    transform: skewX(10deg);
  }
  100% {
    opacity: 1;
    transform: rotateZ(0deg);
  }
}
li:hover > ul.drop-menu.menu-2 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-2 li {
  transform-origin: top center;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-2 li:nth-child(1) {
  animation-name: menu-2;
  animation-duration: 300ms;
  animation-delay: -150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-2 li:nth-child(2) {
  animation-name: menu-2;
  animation-duration: 300ms;
  animation-delay: 0ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-2 li:nth-child(3) {
  animation-name: menu-2;
  animation-duration: 300ms;
  animation-delay: 150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-2 li:nth-child(4) {
  animation-name: menu-2;
  animation-duration: 300ms;
  animation-delay: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-2 li:nth-child(5) {
  animation-name: menu-2;
  animation-duration: 300ms;
  animation-delay: 450ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-2 li:nth-child(6) {
  animation-name: menu-2;
  animation-duration: 300ms;
  animation-delay: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-2 {
  0% {
    opacity: 0;
    transform: rotateX(-90deg);
  }
  50% {
    transform: rotateX(20deg);
  }
  100% {
    opacity: 1;
    transform: rotateX(0deg);
  }
}
li:hover > ul.drop-menu.menu-3 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-3 li {
  transform-origin: top center;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-3 li:nth-child(1) {
  animation-name: menu-3;
  animation-duration: 300ms;
  animation-delay: -150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-3 li:nth-child(2) {
  animation-name: menu-3;
  animation-duration: 300ms;
  animation-delay: 0ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-3 li:nth-child(3) {
  animation-name: menu-3;
  animation-duration: 300ms;
  animation-delay: 150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-3 li:nth-child(4) {
  animation-name: menu-3;
  animation-duration: 300ms;
  animation-delay: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-3 li:nth-child(5) {
  animation-name: menu-3;
  animation-duration: 300ms;
  animation-delay: 450ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-3 li:nth-child(6) {
  animation-name: menu-3;
  animation-duration: 300ms;
  animation-delay: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-3 {
  0% {
    opacity: 0;
    transform: rotateY(90deg);
  }
  70% {
    transform: rotateY(-10deg);
  }
  100% {
    opacity: 1;
    transform: rotateY(0deg);
  }
}
li:hover > ul.drop-menu.menu-4 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-4 li {
  transform-origin: top center;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-4 li:nth-child(1) {
  animation-name: menu-4;
  animation-delay: -150ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-4 li:nth-child(2) {
  animation-name: menu-4;
  animation-delay: 0ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-4 li:nth-child(3) {
  animation-name: menu-4;
  animation-delay: 150ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-4 li:nth-child(4) {
  animation-name: menu-4;
  animation-delay: 300ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-4 li:nth-child(5) {
  animation-name: menu-4;
  animation-delay: 450ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-4 li:nth-child(6) {
  animation-name: menu-4;
  animation-delay: 600ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-4 {
  0% {
    opacity: 0;
    transform: translateX(-100px);
  }
  70% {
    transform: translateX(20px);
  }
  100% {
    opacity: 1;
    transform: translateX(0px);
  }
}
li:hover > ul.drop-menu.menu-5 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-5 li {
  transform-origin: top center;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-5 li:nth-child(1) {
  animation-name: menu-5;
  animation-duration: 150ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-5 li:nth-child(2) {
  animation-name: menu-5;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-5 li:nth-child(3) {
  animation-name: menu-5;
  animation-duration: 450ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-5 li:nth-child(4) {
  animation-name: menu-5;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-5 li:nth-child(5) {
  animation-name: menu-5;
  animation-duration: 750ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-5 li:nth-child(6) {
  animation-name: menu-5;
  animation-duration: 900ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-5 {
  0% {
    opacity: 0;
    transform: scale(0);
  }
  50% {
    opacity: 1;
  }
  90% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
li:hover > ul.drop-menu.menu-6 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-6 li {
  transform-origin: top right;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-6 li:nth-child(1) {
  animation-name: menu-6;
  animation-delay: -150ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-6 li:nth-child(2) {
  animation-name: menu-6;
  animation-delay: 0ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-6 li:nth-child(3) {
  animation-name: menu-6;
  animation-delay: 150ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-6 li:nth-child(4) {
  animation-name: menu-6;
  animation-delay: 300ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-6 li:nth-child(5) {
  animation-name: menu-6;
  animation-delay: 450ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-6 li:nth-child(6) {
  animation-name: menu-6;
  animation-delay: 600ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-6 {
  0% {
    opacity: 0;
    margin-top: 50px;
    transform: rotate(-45deg);
  }
  90% {
    margin-top: -10px;
    transform: rotate(0deg);
  }
  100% {
    opacity: 1;
    margin-top: 0px;
  }
}
li:hover > ul.drop-menu.menu-7 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-7 li {
  transform-origin: top left;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-7 li:nth-child(1) {
  animation-name: menu-7;
  animation-delay: -150ms;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-7 li:nth-child(2) {
  animation-name: menu-7;
  animation-delay: 0ms;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-7 li:nth-child(3) {
  animation-name: menu-7;
  animation-delay: 150ms;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-7 li:nth-child(4) {
  animation-name: menu-7;
  animation-delay: 300ms;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-7 li:nth-child(5) {
  animation-name: menu-7;
  animation-delay: 450ms;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-7 li:nth-child(6) {
  animation-name: menu-7;
  animation-delay: 600ms;
  animation-duration: 600ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-7 {
  0% {
    opacity: 0;
    transform: rotateY(90deg);
    margin-top: -100px;
  }
  80% {
    margin-top: 0px;
    transform: rotateY(90deg);
  }
  90% {
    transform: rotateY(-10deg);
    margin-top: 5px;
  }
  100% {
    opacity: 1;
    margin-top: 0px;
    transform: rotateY(0deg);
  }
}
li:hover > ul.drop-menu.menu-8 {
  perspective: 1000px;
}
li:hover > ul.drop-menu.menu-8 li {
  transform-origin: top left;
  opacity: 0;
}
li:hover > ul.drop-menu.menu-8 li:nth-child(1) {
  animation-name: menu-8;
  animation-delay: 75ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-8 li:nth-child(2) {
  animation-name: menu-8;
  animation-delay: 150ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-8 li:nth-child(3) {
  animation-name: menu-8;
  animation-delay: 225ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-8 li:nth-child(4) {
  animation-name: menu-8;
  animation-delay: 300ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-8 li:nth-child(5) {
  animation-name: menu-8;
  animation-delay: 375ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
li:hover > ul.drop-menu.menu-8 li:nth-child(6) {
  animation-name: menu-8;
  animation-delay: 450ms;
  animation-duration: 300ms;
  animation-fill-mode: forwards;
  animation-timing-function: ease-in-out;
}
@keyframes menu-8 {
  0% {
    opacity: 0;
    transform: skewX(45deg) skewY(-45deg);
  }
  80% {
    transform: skewX(-10) skewY(-10);
  }
  100% {
    opacity: 1;
    transform: skewX(0deg) skewY(0deg);
  }
}