今天在微博上看到别人分享的代码，自己拿来自己保存着。
代码效果如下：
下面是源码：
index.html
<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">
<title>炫酷实用的CSS3 3D垂直手风琴菜单DEMO演示</title>
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<div class="content">
<div style="text-align:center;clear:both">
</div>
<section>
<ul class="container anim-label-4 anim-art ">
<li><input type="radio" id="ac-1" name="ac-3D" checked="checked"/><label for="ac-1" onclick="" title="What is Accordion">What is Accordion</label><article><p>The Accordion is a web control that allows you to provide multiple panes and display them one at a time. It is like having several CollapsiblePanels where only one can be expanded at a time.</p></article></li>
<li><input type="radio" id="ac-2" name="ac-3D" /><label for="ac-2" onclick="" title="Your Panel">Your Panel</label><article><p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p></article></li>
<li><input type="radio" id="ac-3" name="ac-3D" /><label for="ac-3" onclick="" title="Who made this ?">Who made this ?</label><article><p>This is an example of how to create an accordion that has its 3rd panel.</p></article></li>
<li><input type="radio" id="ac-4" name="ac-3D" /><label for="ac-4" onclick="" title="Overview">Overview</label><article><p>This script is created by Roodper. You can always follow me on <a href="https://twitter.com/#!/roodper">Twitter</a> or <a href="https://www.facebook.com/Roodper">Facebook</a>.</p></article></li>
<li><input type="radio" id="ac-5" name="ac-3D" /><label for="ac-5" onclick="" title="Notes">Notes</label><article><p>Remember this is just an example. There are more option and features are available in full version.</p><p>Check out video embedding inside accordion panel.</p><p><iframe width="100%" height="315" src="https://www.youtube.com/embed/k3L7pwrE-tw" frameborder="0" allowfullscreen></iframe></p></article></li>
<li><input type="radio" id="ac-6" name="ac-3D" /><label for="ac-6" onclick="" title="Notes">Notes</label><article><p>Remember this is just an example. There are more option and features are available in full version.</p><p>Check out video embedding inside accordion panel.</p><p><iframe width="100%" height="315" src="https://www.youtube.com/embed/k3L7pwrE-tw" frameborder="0" allowfullscreen></iframe></p></article></li>
</ul>
</section>
</div>
</body>
</html>
下面是样式文件：
style.css
html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{margin:;padding:;border:;font-size:100%;font:inherit;vertical-align:baseline}article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{display:block}
body{line-height:}
ol,ul{list-style:none}html{}body{background-image:url(data:image/png;);font:14px/21px "HelveticaNeue","Helvetica Neue",Helvetica,Arial,sans-serif;color:#444;-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%}.content{background-image:-webkit-gradient(radial,50% 100%,100,50% -50%,100,from(rgba(200,200,200,1.00)),to(rgba(209,209,209,0.00)));background-image:-webkit-radial-gradient(50% 0,rgba(209,209,209,0.00),rgba(200,200,200,1.00));background-image:-moz-radial-gradient(50% 0,rgba(209,209,209,0.00),rgba(200,200,200,1.00));background-image:-ms-radial-gradient(50% 0,rgba(209,209,209,0.00),rgba(200,200,200,1.00));background-image:radial-gradient(50% 0,rgba(209,209,209,0.00),rgba(200,200,200,1.00));height:100%;width:100%;position:absolute;overflow:auto}footer{width:100%;height:30px;top:100px;position:relative;text-align:center;color:#797979}
ul.container{top:20px;margin:0 auto;width:50%;position:relative;padding:;background:#fbfbfb;border:1px solid #7d7d7d;border-bottom:;list-style:none;z-index:;display:block;border-radius:3px 3px 0 0;-webkit-border-radius:3px 3px 0 0;-moz-border-radius:3px 3px 0 0;-o-border-radius:3px 3px 0 0;-ms-border-radius:3px 3px 0 0;-khtml-border-radius:3px 3px 0 0;box-shadow:0 2px 5px rgba(0,0,0,0.28);-webkit-box-shadow:0 2px 5px rgba(0,0,0,0.28);-moz-box-shadow:0 2px 5px rgba(0,0,0,0.28);-o-box-shadow:0 2px 5px rgba(0,0,0,0.28);-ms-box-shadow:0 2px 5px rgba(0,0,0,0.28);-khtml-box-shadow:0 2px 5px rgba(0,0,0,0.28)}ul.container:after,ul.container:before{content:'';width:96%;height:96%;position:absolute;left:2%;z-index:-1;bottom:-4px;background:#f2f2f2;border:1px solid #a1a1a1;box-shadow:0 2px 4px rgba(0,0,0,0.13);-webkit-box-shadow:0 2px 4px rgba(0,0,0,0.13);-moz-box-shadow:0 2px 4px rgba(0,0,0,0.13);-o-box-shadow:0 2px 4px rgba(0,0,0,0.13);-ms-box-shadow:0 2px 4px rgba(0,0,0,0.13);-khtml-box-shadow:0 2px 4px rgba(0,0,0,0.13)}ul.container:before{width:92%;bottom:-8px;left:4%;background:#f2f2f2;border:1px solid #b9b9b9}ul.container li{background:#fbfbfb}.container li label{display:block;color:white;padding:10px;cursor:pointer;font-family:Arial,Helvetica,sans-serif;font-size:15px;font-weight:bold;position:relative;z-index:;line-height:26px;text-shadow:0 1px 0 rgba(0,0,0,0.6);background-color:#5ba6cc;-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;transition:background-color .17s ease;-webkit-transition:background-color .17s ease;-moz-transition:background-color .17s ease;-o-transition:background-color .17s ease;-ms-transition:background-color .17s ease}.container li label,.container.anim-label-4 li label:before{background-image:-webkit-gradient(linear,left top,left bottom,from(rgba(0,0,0,0.10)),to(rgba(0,0,0,0.50)));background-image:-webkit-linear-gradient(top,rgba(0,0,0,0.10),rgba(0,0,0,0.50));background-image:-moz-linear-gradient(top,rgba(0,0,0,0.10),rgba(0,0,0,0.50));background-image:-o-linear-gradient(top,rgba(0,0,0,0.10),rgba(0,0,0,0.50));background-image:-ms-linear-gradient(top,rgba(0,0,0,0.10),rgba(0,0,0,0.50));background-image:linear-gradient(top,rgba(0,0,0,0.10),rgba(0,0,0,0.50));filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,StartColorStr='#000000',EndColorStr='#000000');box-shadow:inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(0,0,0,0.25),0 2px 0 rgba(0,0,0,0.1);-webkit-box-shadow:inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(0,0,0,0.25),0 2px 0 rgba(0,0,0,0.1);-moz-box-shadow:inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(0,0,0,0.25),0 2px 0 rgba(0,0,0,0.1);-o-box-shadow:inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(0,0,0,0.25),0 2px 0 rgba(0,0,0,0.1);-ms-box-shadow:inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(0,0,0,0.25),0 2px 0 rgba(0,0,0,0.1);-khtml-box-shadow:inset 0 1px 0 rgba(255,255,255,0.16),inset 0 -1px 0 rgba(0,0,0,0.25),0 2px 0 rgba(0,0,0,0.1)}ul.container li:first-child,ul.container li:first-child label,ul.container li:first-child label:before{border-radius:2px 2px 0 0;-webkit-border-radius:2px 2px 0 0;-moz-border-radius:2px 2px 0 0;-o-border-radius:2px 2px 0 0;-ms-border-radius:2px 2px 0 0;-khtml-border-radius:2px 2px 0 0}ul.container li input{display:none}ul.container li label:hover{background-color:grey}.container li input:checked ~ label{background-color:#5a5a5a}ul.container li article{height:;overflow:hidden;display: block;-webkit-transition:max-height 1s ease;-moz-transition:max-height 1s ease;-o-transition:max-height 1s ease;-ms-transition:max-height 1s ease;-khtml-transition:max-height 1s ease}ul.container li article p{padding:10px;margin:4px 13px;font-family:Helvetica;word-wrap:break-word;color:#444;font-size:13px;line-height:23px}ul.container li article a{text-decoration:none;color:#6f2a31}ul.container li:last-child article{border-bottom:1px solid #7d7d7d}ul.container li article iframe{border:1px solid #7d7d7d;box-shadow:0 0 10px rgba(0,0,0,0.2);-webkit-box-shadow:0 0 10px rgba(0,0,0,0.2);-moz-box-shadow:0 0 10px rgba(0,0,0,0.2);-o-box-shadow:0 0 10px rgba(0,0,0,0.2);-ms-box-shadow:0 0 10px rgba(0,0,0,0.2);-khtml-box-shadow:0 0 10px rgba(0,0,0,0.2)}ul.container li input:checked ~ article{height:auto;max-height:800px}.anim-art li input:checked ~ article p{transform-origin:top;-webkit-transform-origin:top;-moz-transform-origin:top;-khtml-transform-origin:top;animation:fade-bounce .7s ease normal;-webkit-animation:fade-bounce .7s ease normal;-moz-animation:fade-bounce .7s ease normal;-khtml-animation:fade-bounce .7s ease normal}@keyframes fade-bounce{0%{transform:perspective(800px) translateY(-10px) translateZ(-40px) rotateX(-90deg);opacity:}40%{transform:perspective(800px) translateZ(0px) rotateX(10deg)}70%{transform:perspective(800px) translateZ(0px) rotateX(-5deg)}100%{transform:perspective(800px) translateZ(0px) rotateX(0deg);opacity:}}@-webkit-keyframes fade-bounce{0%{-webkit-transform:perspective(800px) translateY(-10px) translateZ(-40px) rotateX(-90deg);opacity:}40%{-webkit-transform:perspective(800px) translateZ(0px) rotateX(10deg)}70%{-webkit-transform:perspective(800px) translateZ(0px) rotateX(-5deg)}100%{-webkit-transform:perspective(800px) translateZ(0px) rotateX(0deg);opacity:}}@-moz-keyframes fade-bounce{0%{-moz-transform:perspective(800px) translateY(-10px) translateZ(-40px) rotateX(-90deg);opacity:}40%{-moz-transform:perspective(800px) translateZ(0px) rotateX(10deg)}70%{-moz-transform:perspective(800px) translateZ(0px) rotateX(-5deg)}100%{-moz-transform:perspective(800px) translateZ(0px) rotateX(0deg);opacity:}}@-khtml-keyframes fade-bounce{0%{-khtml-transform:perspective(800px) translateY(-10px) translateZ(-40px) rotateX(-90deg);opacity:}40%{-khtml-transform:perspective(800px) translateZ(0px) rotateX(10deg)}70%{-khtml-transform:perspective(800px) translateZ(0px) rotateX(-5deg)}100%{-khtml-transform:perspective(800px) translateZ(0px) rotateX(0deg);opacity:}}.anim-label-4 li label{transform:perspective(0px) translateZ(0px) translateY(0px) rotateX(0deg);-webkit-transform:perspective(0px) translateZ(0px) translateY(0px) rotateX(0deg);-moz-transform:perspective(0px) translateZ(0px) translateY(0px) rotateX(0deg);-khtml-transform:perspective(0px) translateZ(0px) translateY(0px) rotateX(0deg);transform-style:preserve-3d;-webkit-transform-style:preserve-3d;-moz-transform-style:preserve-3d;transform-origin:top;-webkit-transform-origin:top;-moz-transform-origin:top}.anim-label-4 li label:before{content:attr(title);line-height:45px;text-indent:10px;position:absolute;height:100%;width:100%;color:white;left:;top:20px;background-color:#5a5a5a;transform:translateZ(-23px) rotateX(-90deg);-webkit-transform:translateZ(-23px) rotateX(-90deg);-moz-transform:translateZ(-23px) rotateX(-90deg);-o-transform:matrix(1,0,0,0,0,0);-ms-transform:matrix(1,0,0,0,0,0);-khtml-transform:translateZ(-23px) rotateX(-90deg)}.container.anim-label-4 input:checked ~ label{background-color:#adadad;animation:flipup .8s forwards normal ease;-webkit-animation:flipup .8s forwards normal ease;-moz-animation:flipup .8s forwards normal ease;-khtml-animation:flipup .8s forwards normal ease}.container.anim-label-4 input:checked ~ label:hover{-moz-transform:none}@keyframes flipup{0%{transform:perspective(600px) translateZ(0px) rotateX(0deg)}40%{transform:perspective(800px) translateZ(-43px) rotateX(100deg)}70%{transform:perspective(1000px) translateZ(-43px) rotateX(87deg)}100%{transform:perspective(1000px) translateZ(-43px) rotateX(90deg)}}@-webkit-keyframes flipup{0%{-webkit-transform:perspective(600px) translateZ(0px) rotateX(0deg)}40%{-webkit-transform:perspective(800px) translateZ(-43px) rotateX(100deg)}70%{-webkit-transform:perspective(1000px) translateZ(-43px) rotateX(87deg)}100%{-webkit-transform:perspective(1000px) translateZ(-43px) rotateX(90deg)}}@-moz-keyframes flipup{0%{-moz-transform:perspective(600px) translateZ(0px) rotateX(0deg)}40%{-moz-transform:perspective(800px) translateZ(-43px) rotateX(100deg)}70%{-moz-transform:perspective(1000px) translateZ(-43px) rotateX(87deg)}100%{-moz-transform:perspective(1000px) translateZ(-43px) rotateX(90deg)}}@-khtml-keyframes flipup{0%{-khtml-transform:perspective(600px) translateZ(0px) rotateX(0deg)}40%{-khtml-transform:perspective(800px) translateZ(-40px) rotateX(100deg)}70%{-khtml-transform:perspective(1000px) translateZ(-43px) rotateX(87deg)}100%{-khtml-transform:perspective(1000px) translateZ(-43px) rotateX(90deg)}}.buy{transition:all .2s ease;-webkit-transition:all .2s ease;-moz-transition:all .2s ease;-ms-transition:all .2s ease;-o-transition:all .2s ease;-khtml-transition:all .2s ease;height:25px;border:1px #093c49 solid;width:60px;background:#145869;color:white!important;padding:10px 20px;font-size:20px;font-weight:bold;box-shadow:inset 0 0 0 white,0 0 5px rgba(0,0,0,0.4);-webkit-box-shadow:inset 0 0 0 white,0 0 5px rgba(0,0,0,0.4);-moz-box-shadow:inset 0 0 0 white,0 0 5px rgba(0,0,0,0.4);-o-box-shadow:inset 0 0 0 white,0 0 5px rgba(0,0,0,0.4);-ms-box-shadow:inset 0 0 0 white,0 0 5px rgba(0,0,0,0.4);-khtml-box-shadow:inset 0 0 0 white,0 0 5px rgba(0,0,0,0.4)}.buy:hover{color:#145869!important;background:white!important}.buy:active{box-shadow:inset 0 0 5px rgba(0,0,0,0.4),0 0 0 white;-webkit-box-shadow:inset 0 0 5px rgba(0,0,0,0.4),0 0 0 white;-moz-box-shadow:inset 0 0 5px rgba(0,0,0,0.4),0 0 0 white;-o-box-shadow:inset 0 0 5px rgba(0,0,0,0.4),0 0 0 white;-ms-box-shadow:inset 0 0 5px rgba(0,0,0,0.4),0 0 0 white;-khtml-box-shadow:inset 0 0 5px rgba(0,0,0,0.4),0 0 0 white}
具体为什么是这个效果，我也不知道，以后有空再分析吧。