CSS--导航栏旋转展示

导航栏旋转展示效果：

/*结构*/
<ul class="ul_main">
  <li>
    <a href="javascript(0)">哈哈哈哈</a>
    <ul class="ul_">
      <li><a href="javascript(0)">sddd</a></li>
      <li><a href="javascript(0)">fgfgfg</a></li>
      <li><a href="javascript(0)">kkkk</a></li>
      <li><a href="javascript(0)">yuqweu</a></li>
      <li><a href="javascript(0)">jiaowodage</a></li>
      <li><a href="javascript(0)">helloworld</a></li>
    </ul>
  </li>
  <li>
    <a href="javascript(0)">嘿嘿嘿</a>
    <ul class="ul_">
      <li><a href="javascript(0)">aaaaa</a></li>
      <li><a href="javascript(0)">bbbbb</a></li>
      <li><a href="javascript(0)">ccccc</a></li>
      <li><a href="javascript(0)">ddddd</a></li>
      <li><a href="javascript(0)">fffff</a></li>
      <li><a href="javascript(0)">ggggg</a></li>
      <li><a href="javascript(0)">hhhhh</a></li>
      <li><a href="javascript(0)">iiiii</a></li>
      <li><a href="javascript(0)">jjjjj</a></li>
      <li><a href="javascript(0)">kkkkk</a></li>
      <li><a href="javascript(0)">lllll</a></li>
    </ul>
  </li>
  <li><a href="javascript(0)">嘻嘻嘻</a></li>
  <li><a href="javascript(0)">呵呵呵</a></li>
  <li><a href="javascript(0)">吼吼吼</a></li>
</ul>

/*基础样式*/
ul{
    background: #23527C;
    margin: 0;
    padding: 0;
}
li{
    list-style: none;
}
a{
    text-decoration: none;
    color: #FFFF00;
}
.ul_main{
     500px;
    height: 30px;
    display: flex;
    justify-content: space-around;
    text-align: center;
    line-height: 30px;
}
.ul_main li{
    flex: 1;
    position: relative;
}
.ul_{
     100%;
    display: none;
    text-align: center;
}
.ul_ li{
    border-top: 1px solid #03A9F3;
}
.ul_main li:hover .ul_{
    display: block;
}

/*旋转*/


.ul_ {
	position: absolute;
	left: 50%;
	top: 30px;
	max-height: 0;
	z-index: 0;
	-webkit-perspective: 400px;
	-moz-perspective: 400px;
	-ms-perspective: 400px;
	-o-perspective: 400px;
	perspective: 400px;
	display: inline-block !important;
	background: rgba(255,255,255,0);
	box-shadow: none;
	border: none;
	transform: translateX(-50%);
	-ms-transform: translateX(-50%);
	-moz-transform: translateX(-50%);
	-webkit-transform: translateX(-50%);
	-o-transform: translateX(-50%);
	visibility: hidden;
}

.ul_ li {
	background: #23527C;
	-webkit-transform: rotateY(90deg);
	-moz-transform: rotateY(90deg);
	-ms-transform: rotateY(90deg);
	-o-transform: rotateY(90deg);
	transform: rotateY(90deg);
	-webkit-transition: opacity .4s, -webkit-transform .5s;
	-moz-transition: opacity .4s, -moz-transform .5s;
	-ms-transition: opacity .4s, -ms-transform .5s;
	-o-transition: opacity .4s, -o-transform .5s;
	transition: opacity .4s, transform .5s;
	/*实现下拉菜单螺旋淡出*/
}


.ul_main > li:hover .ul_, .ul_main > li:focus .ul_ {
	max-height: 2000px;
	z-index: 9999;
	visibility: visible;
	display: block;
}

.ul_main > li:hover .ul_ li, .ul_main > li:focus .ul_ li {
	opacity:1;
	-webkit-transform: none;
	-moz-transform: none;
	-ms-transform: none;
	-o-transform: none;
	transform: none;
	visibility: visible;
	display: block;
}
/*动画递进的时间 实现一个个螺旋子菜单*/
.ul_main li:hover .ul_ li:nth-child(1) {
	-webkit-transition-delay: 0s;
	-moz-transition-delay: 0s;
	-ms-transition-delay: 0s;
	-o-transition-delay: 0s;
	transition-delay: 0s;
}

.ul_main li:hover .ul_ li:nth-child(2) {
	-webkit-transition-delay: 50ms;
	-moz-transition-delay: 50ms;
	-ms-transition-delay: 50ms;
	-o-transition-delay: 50ms;
	transition-delay: 50ms;
}

.ul_main li:hover .ul_ li:nth-child(3) {
	-webkit-transition-delay: 100ms;
	-moz-transition-delay: 100ms;
	-ms-transition-delay: 100ms;
	-o-transition-delay: 100ms;
	transition-delay: 100ms;
}

.ul_main li:hover .ul_ li:nth-child(4) {
	-webkit-transition-delay: 150ms;
	-moz-transition-delay: 150ms;
	-ms-transition-delay: 150ms;
	-o-transition-delay: 150ms;
	transition-delay: 150ms;
}

.ul_main li:hover .ul_ li:nth-child(5) {
	-webkit-transition-delay: 200ms;
	-moz-transition-delay: 200ms;
	-ms-transition-delay: 200ms;
	-o-transition-delay: 200ms;
	transition-delay: 200ms;
}

.ul_main li:hover .ul_ li:nth-child(6) {
	-webkit-transition-delay: 250ms;
	-moz-transition-delay: 250ms;
	-ms-transition-delay: 250ms;
	-o-transition-delay: 250ms;
	transition-delay: 250ms;
}

.ul_main li:hover .ul_ li:nth-child(7) {
	-webkit-transition-delay: 300ms;
	-moz-transition-delay: 300ms;
	-ms-transition-delay: 300ms;
	-o-transition-delay: 300ms;
	transition-delay: 300ms;
}

.ul_main li:hover .ul_ li:nth-child(8) {
	-webkit-transition-delay: 350ms;
	-moz-transition-delay: 350ms;
	-ms-transition-delay: 350ms;
	-o-transition-delay: 350ms;
	transition-delay: 350ms;
}

.ul_main li:hover .ul_ li:nth-child(9) {
	-webkit-transition-delay: 400ms;
	-moz-transition-delay: 400ms;
	-ms-transition-delay: 400ms;
	-o-transition-delay: 400ms;
	transition-delay: 400ms;
}

.ul_main li:hover .ul_ li:nth-child(10) {
	-webkit-transition-delay: 450ms;
	-moz-transition-delay: 450ms;
	-ms-transition-delay: 450ms;
	-o-transition-delay: 450ms;
	transition-delay: 450ms;
}

.ul_main li:hover .ul_ li:nth-child(11) {
	-webkit-transition-delay: 500ms;
	-moz-transition-delay: 500ms;
	-ms-transition-delay: 500ms;
	-o-transition-delay: 500ms;
	transition-delay: 500ms;
}

.ul_main li:hover .ul_ li:nth-child(12) {
	-webkit-transition-delay: 550ms;
	-moz-transition-delay: 550ms;
	-ms-transition-delay: 550ms;
	-o-transition-delay: 550ms;
	transition-delay: 550ms;
}

.ul_main li:hover .ul_ li:nth-child(13) {
	-webkit-transition-delay: 600ms;
	-moz-transition-delay: 600ms;
	-ms-transition-delay: 600ms;
	-o-transition-delay: 600ms;
	transition-delay: 600ms;
}

.ul_main li:hover .ul_ li:nth-child(14) {
	-webkit-transition-delay: 650ms;
	-moz-transition-delay: 650ms;
	-ms-transition-delay: 650ms;
	-o-transition-delay: 650ms;
	transition-delay: 650ms;
}

.ul_main li:hover .ul_ li:nth-child(15) {
	-webkit-transition-delay: 700ms;
	-moz-transition-delay: 700ms;
	-ms-transition-delay: 700ms;
	-o-transition-delay: 700ms;
	transition-delay: 700ms;
}

.ul_main li:hover .ul_ li:nth-child(16) {
	-webkit-transition-delay: 750ms;
	-moz-transition-delay: 750ms;
	-ms-transition-delay: 750ms;
	-o-transition-delay: 750ms;
	transition-delay: 750ms;
}

.ul_ li {
	-webkit-transition-delay: 0s;
	-moz-transition-delay: 0s;
	-ms-transition-delay: 0s;
	-o-transition-delay: 0s;
	transition-delay: 0s;
}