z-index: 2;
text-indent: -9000px;
}
再来，让我们来处理容器和每个切片的背景图片：
.cr-container input.cr-selector-img-1:checked ~ .cr-bgimg,
.cr-bgimg div span:nth-child(1){
background-image: url(../images/1.jpg);
}
.cr-container input.cr-selector-img-2:checked ~ .cr-bgimg,
.cr-bgimg div span:nth-child(2){
background-image: url(../images/2.jpg);
}
.cr-container input.cr-selector-img-3:checked ~ .cr-bgimg,
.cr-bgimg div span:nth-child(3){
background-image: url(../images/3.jpg);
}
.cr-container input.cr-selector-img-4:checked ~ .cr-bgimg,
.cr-bgimg div span:nth-child(4){
background-image: url(../images/4.jpg);
}
我们还需要根据不同的面板为切片的背景图片提供不同的定位：
.cr-bgimg div:nth-child(1) span{
background-position: 0px 0px;
}
.cr-bgimg div:nth-child(2) span{
background-position: -150px 0px;
}
.cr-bgimg div:nth-child(3) span{
background-position: -300px 0px;
}
.cr-bgimg div:nth-child(4) span{
background-position: -450px 0px;
}
当我们单击一个label标签时，我们将所有的切片滑到右边：
.cr-container input:checked ~ .cr-bgimg div span{
animation: slideOut 0.6s ease-in-out;
}
@keyframes slideOut{
0%{
left: 0px;
}
100%{
left: 150px;
}
}
但是除了我们选中的这个label标签，它对应的图片切片是从-150px滑到0px：
.cr-container input.cr-selector-img-1:checked ~ .cr-bgimg div span:nth-child(1),
.cr-container input.cr-selector-img-2:checked ~ .cr-bgimg div span:nth-child(2),
.cr-container input.cr-selector-img-3:checked ~ .cr-bgimg div span:nth-child(3),
.cr-container input.cr-selector-img-4:checked ~ .cr-bgimg div span:nth-child(4)
{
transition: left 0.5s ease-in-out;
animation: none;
left: 0px;
z-index: 10;
}最后，设置h3标签中主副标题的样式，当我们点击了某个label标签后，它对应的标题的透明度会从0过渡到1：
.cr-titles h3{
position: absolute;
width: 100%;
text-align: center;
top: 50%;
z-index: 10000;
opacity: 0;
color: #fff;
text-shadow: 1px 1px 1px rgba(0,0,0,0.1);
transition: opacity 0.8s ease-in-out;
}
.cr-titles h3 span:nth-child(1){
font-family: 'BebasNeueRegular', 'Arial Narrow', Arial, sans-serif;
font-size: 70px;
display: block;
letter-spacing: 7px;
}
.cr-titles h3 span:nth-child(2){
letter-spacing: 0px;
display: block;
background: rgba(104,171,194,0.9);
font-size: 14px;
