html+css实现三条横线点击变叉导航菜单

使用html+css实现三条横线的菜单按钮，点击弹出列表菜单，菜单按钮变叉，点击叉按钮或点击列表项收回菜单：

点击按钮：

点击叉按钮或者菜单列表项都可以收回菜单。

css代码：

.inner-header{
	background-color: rgba(0,0,0,1);
	width: 100%;
	height: 50px;
	position: absolute;
	top: 0px;
	left: 0px;
}
.inner-header-icon{
	color: #ffffff;
	height: 50px;
	font-size:25px;
	text-align: center;
	float:right;
	width: 50px;
	position: relative;
	-webkit-transition: background 0.5s;
	-moz-transition: background 0.5s;
	-o-transition: background 0.5s;
	transition: background 0.5s;
}
.inner-header-icon:hover{
	background-color: rgba(255,255,255,0.2);
	cursor: pointer;
}
.inner-header-icon span{
	position: absolute;
	left: calc((100% - 25px) / 2);
	top: calc((100% - 1px) / 2);
	width: 25px;
	height: 1px;
	background-color: rgba(255,255,255,1);
}
.inner-header-icon span:nth-child(1){
	transform: translateY(4px) rotate(0deg);
}

.inner-header-icon span:nth-child(2){
	opacity: 0;
}

.inner-header-icon span:nth-child(3){
	transform: translateY(-4px) rotate(0deg);
}


.inner-header-icon-click span:nth-child(1){
	animation-duration: 0.5s;
	animation-fill-mode: both;
	animation-name: clickfirst;
	}

.inner-header-icon-click span:nth-child(2){
	animation-duration: 0.5s;
	animation-fill-mode: both;
	animation-name: clicksecond;
}

.inner-header-icon-click span:nth-child(3){
	animation-duration: 0.5s;
	animation-fill-mode: both;
	animation-name: clickthird;
	}


/*第一条线旋转动画*/
@keyframes clickfirst {
  0% {
	  transform: translateY(4px) rotate(0deg);
	  
  }

  100% {
    transform: translateY(0) rotate(45deg);
  }
}
/*第二条线淡入淡出动画动画*/
@keyframes clicksecond {
	0% {
		opacity: 1;
	}
	100% {
		opacity: 0;
	}
}

/*第三条线旋转动画*/
@keyframes clickthird {
  0% {
	  transform: translateY(-4px) rotate(0deg);
  }

  100% {
    transform: translateY(0) rotate(-45deg);
  }
}	

.inner-header-icon-out span:nth-child(1){
	animation-duration: 0.5s;
	animation-fill-mode: both;
	animation-name: outfirst;
	}

.inner-header-icon-out span:nth-child(2){
	animation-duration: 0.5s;
	animation-fill-mode: both;
	animation-name: outsecond;
}
.inner-header-icon-out span:nth-child(3){
	animation-duration: 0.5s;
	animation-fill-mode: both;
	animation-name: outthird;
	}

@keyframes outfirst {
  0% {
    transform: translateY(0) rotate(-45deg);
  }

  100% {
    transform: translateY(-4px) rotate(0deg);
  }
}

@keyframes outsecond {
  0% {
    opacity: 0;
  }

  100% {
	  opacity: 1;
  }
}

@keyframes outthird {
	0% {
		transform: translateY(0) rotate(45deg);
	}

	100% {
		transform: translateY(4px) rotate(0deg);
	}
}

.inner-nav{
	background-color: rgba(0,0,0,0.9);
	width: 100%;
	position: absolute;
	top: 50px;
	left: 0px;
	padding-top: 30px;
	padding-bottom: 80px;
	display: none;
}
.inner-nav a{
	display: inline-block;
	line-height: 50px;
	text-decoration: none;
	width: 80%;
	margin-left: 10%;
	color: #FFFFFF;
	border-bottom: solid 1px rgba(255,255,255,0.3);
	-webkit-transition: all 0.5s;
	-moz-transition: all 0.5s;
	-o-transition: all 0.5s;
	transition: all 0.5s;
	font-weight:300;
}
.inner-nav a:hover{
	color: rgba(255,255,255,0.4);
	border-bottom: solid 1px rgba(255,255,255,0.2);
}

html代码：（使用代码时记得引入jquery-2.1.1.min.js文件）

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