任务一、制作多背景
提示：上层有一个径向渐变，渐变图像farthest-side ellipse at center, rgba(246,241,232,.85) 39%,rgba(212,204,186,.5) 100%)，底层使用背景图片。
任务二、控制背景图像尺寸
提示：使用background-size，让两层背景都是全屏显示
任务三、给每个列表项添加过渡动画效果
提示：使用transition属性，给每个列表项.item设置变形过渡效果。transition: -webkit-transform .6s;
任务四、悬浮状态改变每个列表项的transform效果
提示：通过transform属性，在列表悬浮状态设置 3D旋转效果：translateZ(-50px) rotateX(95deg);
任务五、设置列表项图片的圆角和阴影效果
提示：通过border-radius和box-shadow给图像设置圆角和阴影效果。
任务六、给底层显示文本的层级设置渐变效果
提示：使用CSS3渐变属性设置选项卡文本层的背景效果
任务七、列表项悬浮状态时，去掉图片的阴影效果
提示：通过box-shadow去掉图片阴影效果
效果图：
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body {
margin-top: 5em;
text-align: center;
color: #414142;
background: rgb(246,241,232);
/*任务一、制作多背景*/
background-image: -ms-radial-gradient(farthest-side ellipse at center, rgba(246,241,232,.85) 39%,rgba(212,204,186,.5) 100%), url("http://fs0.139js.com/file/s_jpg_857b081bjw1du3kveu19sj.jpg");
background-image: -webkit-radial-gradient(farthest-side ellipse at center, rgba(246,241,232,.85) 39%,rgba(212,204,186,.5) 100%), url("http://fs0.139js.com/file/s_jpg_857b081bjw1du3kveu19sj.jpg");
background-image: radial-gradient( farthest-side ellipse at center, rgba(246,241,232,.85) 39%,rgba(212,204,186,.5) 100%), url("http://fs0.139js.com/file/s_jpg_857b081bjw1du3kveu19sj.jpg");
/*任务二、控制背景图像尺寸*/
background-size: cover;
}
h1, em, #information {
display: block;
font-size: 25px;
font-weight: normal;
margin: 2em auto;
}
a {
color: #414142;
font-style: normal;
text-decoration: none;
font-size: 20px;
}
a:hover {
text-decoration: underline;
}
#container {
margin: 0 auto;
width: 1024px;
}
.wrapper {
display: inline-block;
width: 310px;
height: 100px;
vertical-align: top;
margin: 1em 1.5em 2em 0;
cursor: pointer;
position: relative;
font-family: Tahoma, Arial;
-webkit-perspective: 4000px;
-moz-perspective: 4000px;
-ms-perspective: 4000px;
-o-perspective: 4000px;
perspective: 4000px;
}
.item {
height: 100px;
-webkit-transform-style: preserve-3d;
-moz-transform-style: preserve-3d;
-ms-transform-style: preserve-3d;
-o-transform-style: preserve-3d;
transform-style: preserve-3d;
/*任务三、给每个列表项添加过渡动画效果*/
-webkit-transition: -webkit-transform .6s;
-moz-transition: -moz-transform .6s;
-ms-transition: -ms-transform .6s;
-o-transition: -o-transform .6s;
transition: transform .6s;
}
.item:hover {
/*任务四、悬浮状态改变每个列表项的transform效果*/
-webkit-transform: translateZ(-50px) rotateX(95deg);
-moz-transform: translateZ(-50px) rotateX(95deg);
-ms-transform: translateZ(-50px) rotateX(95deg);
-o-transform: translateZ(-50px) rotateX(95deg);
transform: translateZ(-50px) rotateX(95deg);
}
.itemimg {
display: block;
position: absolute;
top: 0;
/*任务五、设置列表项图片的圆角和阴影效果*/
border-radius: 3px;
box-shadow: 0px 3px 8px rgba(0,0,0,0.3);
-webkit-transform: translateZ(50px);
-moz-transform: translateZ(50px);
-ms-transform: translateZ(50px);
-o-transform: translateZ(50px);
transform: translateZ(50px);
-webkit-transition: all .6s;
-moz-transition: all .6s;
-ms-transition: all .6s;
-o-transition: all .6s;
transition: all .6s;
width: 310px;
height: 100px;
}
.item .information {
display: block;
position: absolute;
top: 0;
height: 80px;
width: 290px;
text-align: left;
border-radius: 15px;
padding: 10px;
font-size: 12px;
text-shadow: 1px 1px1pxrgba(255,255,255,0.5);
box-shadow: none;
background: rgb(236,241,244);
/*任务六、给底层显示文本的层级设置渐变效果*/
background: -webkit-linear-gradient(to bottom, rgba(236,241,244,1) 0%,rgba(190,202,217,1) 100%);
background: -ms-linear-gradient(to bottom, rgba(236,241,244,1) 0%,rgba(190,202,217,1) 100%);
background: linear-gradient(to bottom, rgba(236,241,244,1) 0%,rgba(190,202,217,1) 100%);
-webkit-transform: rotateX(-90deg) translateZ(50px);
-moz-transform: rotateX(-90deg) translateZ(50px);
-ms-transform: rotateX(-90deg) translateZ(50px);
-o-transform: rotateX(-90deg) translateZ(50px);
transform: rotateX(-90deg) translateZ(50px);
-webkit-transition: all .6s;
-moz-transition: all .6s;
-ms-transition: all .6s;
-o-transition: all .6s;
transition: all .6s;
}
.information strong {
display: block;
margin: .2em 0 .5em 0;
font-size: 20px;
font-family: "Oleo Script";
}
.item:hoverimg {
/*任务七、列表项悬浮状态时，去掉图片的阴影效果*/
box-shadow: none;
border-radius: 15px;
}
.item:hover .information {
box-shadow: 0px 3px 8px rgba(0,0,0,0.3);
border-radius: 3px;
}
</style>
</head>
<body>
<div id="container">
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<div class="wrapper">
<div class="item">
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<span class="information">
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<img src="http://pic5.qiyipic.com/image/20140319/7a/8d/4f/a_100003478_m_601_m1_180_101.jpg" />
<span class="information">
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<div class="item">
<img src="http://pic0.qiyipic.com/image/20140517/ce/e8/42/v_106167752_m_601_180_101.jpg" />
<span class="information">
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<span class="information">
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</span>
</div>
</div>
</div>
</body>
</html>