body{
	font-family: georgia,serif;
	background: #ddd;
	font-weight: 400;
	font-size: 15px;
	color: #333;
	overflow: hidden;
	-webkit-font-smoothing: antialiased;/*常用于英文字体*/
}
a{
	text-decoration: none;
	color: #555;
}
.clr{
	width: 0;
	height: 0;
	overflow: hidden;
	clear: both;
	padding: 0;
	margin: 0;
}
.st-container{
	width: 100%;
	height: 100%;
	position: absolute;
	left: 0;
	top: 0;
	font-family: "Josefin Slab","Myriad Pro",arial,sans-serif;
}
.st-container > input,
.st-container > a{
	width: 20%;
	height: 34px;
	line-height: 34px;
	position: fixed;
	bottom: 0;
	cursor: pointer;
}
.st-container > input{
	opacity: 0;
	z-index: 1000;
}
.st-container > a{
	z-index: 10;
	font-weight: 700;
	font-size: 16px;
	background: #e23a6e;
	text-align: center;
	color: #fff;
	text-shadow: 1px 1px 1px rgba(151,24,64,0.2);
}

#st-control-1,#st-control-1 + a{
	left: 0%;
}
#st-control-2,#st-control-2 + a{
	left: 20%;
}
#st-control-3,#st-control-3 + a{
	left: 40%;
}
#st-control-4,#st-control-4 + a{
	left: 60%;
}
#st-control-5,#st-control-5 + a{
	left: 80%;
}

.st-container input:checked + a,
.st-container input:checked:hover + a{
	background: #821134;
}

.st-container input:checked + a:after{
	content: "";
	width: 0;
	height: 0;
	overflow: hidden;
	border: 20px solid transparent;
	border-bottom-color:#821134 ;
	position: absolute;
	bottom: 100%;
	left: 50%;
	margin-left: -20px;
}
.st-container input:hover +  a{
	background: #AD244F;
}

.st-scroll,
.st-panel{
	width: 100%;
	position: relative;
	height: 100%;
	left: 0%;
	top: 0%;
}
.st-scroll{
	left: 0;
	top:0;
	-webkit-transform: translate3d(0,0,0);/*在移动端建议用3D变换，因为它可以开启手机硬件加速*/
	-moz-transform: translate3d(0,0,0);
	-o-transform: translate3d(0,0,0);
	-ms-transform: translate3d(0,0,0);
	transform: translate3d(0,0,0);
	-webkit-backface-visibility: hidden;
}
.st-panel{
	background: #fff;
	overflow: hidden;
	
}
#st-control-1:checked ~ .st-scroll{
	transform: translateY(0%);
}
#st-control-2:checked ~ .st-scroll{
	transform: translateY(-100%);
}
#st-control-3:checked ~ .st-scroll{
	transform: translateY(-200%);
}
#st-control-4:checked ~ .st-scroll{
	transform: translateY(-300%);
}
#st-control-5:checked ~ .st-scroll{
	transform: translateY(-400%);
}

1. position: relative;height: 100%;

2. position: absolute;left:0;top:0;width: 100%;height: 100%;

3. ....

4. 视频用的第一种