纯CSS3实现全屏焦点图切换效果

CSS样式

*{margin:0;padding:0;list-style: none;}
img.bg{min-width: 1024px;min-height: 100%;width: 100%;height: auto!important;height: 100%;position: fixed;top: 0;left: 0;z-index: 1;}
@media screen and (max-width: 1024px) {
    img.bg{
        left: 50%;
        margin-left: -512px;
    }
}
.slider{
    position: absolute;
    width: 100%;
    text-align: center;
    z-index: 999;
    bottom: 100px;
}
.slider li{
    display: inline-block;
    width: 170px;
    height: 130px;
    margin-right: 15px;
}
.slider a{
    display: inline-block;
    width: 170px;
    padding-top:70px;
    padding-bottom:20px;
    position: relative;
    cursor: pointer;
    border:2px solid #fff;
    border-radius: 5px;
    vertical-align: top;/*设置元素的垂直对齐方式。*/
    color: #FFFFFF;
    text-decoration: none;
    font-size: 22px;
    font-family: "楷体";
    text-shadow: -1px -1px 1px rgba(0,0,0,0.8),
    -2px -2px 1px rgba(0, 0, 0, 0.3),
     -3px -3px 1px rgba(0, 0, 0, 0.3);
}
.slider li:nth-of-type(1) a{
    background-color: #02646e;
}
.slider li:nth-of-type(2) a{
    background-color: #eb0837;
}
.slider li:nth-of-type(3) a {
    background-color: #67b374;
}
.slider li:nth-of-type(4) a {
    background-color: #e6674a;
}
.slider li:nth-of-type(5) a {
    background-color: #e61061;
}
.slider a::after{/*:after 选择器在被选元素的内容后面插入内容。*/
    content: "";
    display: block;
    height: 120px;
    width: 120px;
    border:5px solid #fff;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    margin-left: -60px;
    z-index: 9999;
    top: -80px;
}
.slider li:nth-of-type(1) a::after {
    /*:nth-of-type(n) 选择器匹配属于父元素的特定类型的第 N 个子元素的每个元素.*/
    background: url(img/sbg1.jpg) no-repeat center;
}
.slider li:nth-of-type(2) a::after {
    background: url(img/sbg2.jpg) no-repeat center;
}
.slider li:nth-of-type(3) a::after {
    background: url(img/sbg3.jpg) no-repeat center;
}
.slider li:nth-of-type(4) a::after {
    background: url(img/sbg4.jpg) no-repeat center;
}
.slider li:nth-of-type(5) a::after {
    background: url(img/sbg5.jpg) no-repeat center;
}
.slider a::before{
    content: "";
    display: block;
    height: 120px;
    width: 120px;
    border:5px solid #fff;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    margin-left: -60px;
    z-index: 99999;
    top: -80px;
    background:rgba(0,0,0,0.3);
}
.slider a:hover::before{
    opacity: 0;
}
@-webkit-keyframes 'slideLeft'{
    0%{
        left:-500px;
    }
    100%{
        left:0;
    }
}
.slideLeft:target{
    /*:target 选择器可用于选取当前活动的目标元素*/
    z-index: 100;
    animation: slideLeft 1s 1;
    -webkit-animation: slideLeft 1s 1;
}
@-webkit-keyframes 'slideBottom'{
    0%{
        top:350px;
    }
    100%{
        top:0;
    }
}
.slideBottom:target{
    /*:target 选择器可用于选取当前活动的目标元素*/
    z-index: 100;
    animation: slideBottom 1s 1;
    -webkit-animation: slideBottom 1s 1;
}
@-webkit-keyframes 'zoomIn' {
 0% {
-webkit-transform: scale(0.1);
}
 100% {
-webkit-transform: none;
}
}
.zoomIn:target {
    z-index: 100;
    -webkit-animation: zoomIn 1s 1;
    animation: zoomIn 1s 1;
}
/* Zoom Out */
@-webkit-keyframes 'zoomOut' {
 0% {
-webkit-transform: scale(2);
}
 100% {
-webkit-transform: none;
}
}
.zoomOut:target {
    z-index: 100;
    -webkit-animation: zoomOut 1s 1;
    animation: zoomOut 1s 1;
}
 
/* Rotate */
 
@-webkit-keyframes 'rotate' {
 0% {
-webkit-transform: rotate(-360deg) scale(0.1);
}
 100% {
-webkit-transform: none;
}
}
.rotate:target {
    z-index: 100;
    -webkit-animation: rotate 1s 1;
    animation: rotate 1s 1;
    
}
@-webkit-keyframes 'notTarget' {
     0% {
    z-index: 75;
}
     100% {
    z-index: 75;
}
}
.bg:not(:target) {
        -webkit-animation: notTarget 1s 1;
        animation: notTarget 1s 1
    }
    .page {
        text-align:left;
}

HTML结构

<div class="slider">
    <ul>
        <li><a href="#bg1">Hipster Fashion Haircut</a></li>
        <li><a href="#bg2">Cloud Computing Services &amp; Consulting</a></li>
        <li><a href="#bg3">My haire is sooo fantastic!</a></li>
        <li><a href="#bg4">Eat healthy &amp; excersice!</a></li>
        <li><a href="#bg5">Lips so kissable I could die ...</a></li>
    </ul>
</div>
<img src="img/bg1.jpg" class="bg slideLeft" id="bg1" />
<img src="img/bg2.jpg" class="bg slideBottom" id="bg2" />
<img src="img/bg3.jpg" class="bg zoomIn" id="bg3" />
<img src="img/bg4.jpg" class="bg zoomOut" id="bg4" />
<img src="img/bg5.jpg" class="bg rotate" id="bg5" />