使用CSS创建3D效果

<style>
/* BASIC RESET */
ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,body,macbook,p,blockquote,fieldset,input{margin:0; padding:0;}

/* HTML ELEMENTS */
body { background: -moz-radial-gradient(#364D58,#000); background: -webkit-gradient(radial, center center,10,center center,1000, from(#364D58), to(#000)); color:#555; background-color:#151f23; }
h1 { font: bold 50px Helvetica, Arial, Sans-serif; text-align: center; color: #eee; text-shadow: 0px 2px 6px #333; }
h1 small{ font-size: 20px; text-transform:uppercase; letter-spacing: 14px; display: block; color: #ccc; margin-top:10px; }
h2 a { display: block; text-decoration: none; margin: 0 0 30px 0; font: italic 40px Georgia, Times, Serif;  text-align: center; color: #bfe1f1; text-shadow: 0px 2px 6px #333; }
h2 a:hover { color: #90bcd0; }

/* COMMON CLASSES */
.break { clear:both; }

/* WRAPPER */
#wrapper { width:800px; margin:40px auto; }

/* CONTENT */
#content { }
#content h2 { font: bold 30px Helvetica, Arial, Sans-serif; color:#eee; text-shadow: 0px 2px 6px #333; margin-left:400px; padding-top:20px; }

/* BAR CHART */
#bar { list-style:none; margin:70px 0 0 200px; width:400px; }
#bar li { margin-top:-40px; }

/* First top should have a different colour */
#bar li:first-child div.top { background-color:rgba(186,211,215,0.5); }

/* Last bottom should have a shadow */
#bar li:last-child div.bottom { -moz-box-shadow: 0 10px 10px hsla(0,0%,0%,.2); -webkit-box-shadow: 0 100px 30px hsla(0,0%,0%,.2); box-shadow: 0 100px 30px hsla(0,0%,0%,.2); }

/* Ellipse top */
#bar li div.top { background-color:rgba(140,172,176,0.5); position:relative;
width:100px; height:40px; -moz-border-radius: 100px/40px; -webkit-border-radius: 100px 40px; border-radius: 100px/40px; }
#bar li div.top img { margin-left:18px; margin-top:-32px; display:none; }

/* Bar bottom */
#bar li div.bottom { background-color:rgba(184,203,205,0.5); margin-top:-40px; position:relative;
width:100px; -moz-border-radius: 100px/40px; -webkit-border-radius: 100px 40px; border-radius: 100px/40px; }
#bar li div.bottom div.infobox { padding:40px 0 0 200px; }
#bar li div.bottom div.infobox h3 { font-family:Georgia,serif,Times; }
#bar li div.bottom div.infobox p { font-family:"Lucida Grande",Arial,Helvetica,Sans-Serif; }

/* General hover actions */
#bar li:hover div.top img { display:inline; }
#bar li:hover div.bottom div.infobox { color:#eee; text-shadow: 0px 5px 5px #111; }

/* iPhone bar */
#iphone div.top { z-index:99; }
#iphone div.bottom { z-index:98; height:150px; }
#iphone:hover div.top { z-index:999; background-color:#1f81ac; }
#iphone:hover div.bottom { z-index:998; background-color:#1a6c90;
background:-moz-linear-gradient(-90deg, #1a6c90, #14506b); background:-webkit-gradient(linear, 0 top, 0 bottom, from(#1a6c90), to(#14506b)); }

/* MacBook bar */
#macbook div.top { z-index:97; }
#macbook div.bottom { z-index:96; height:200px; }
#macbook:hover div.top { z-index:997; background-color:#bc003c; }
#macbook:hover div.bottom { z-index:996; background-color:#9d0032;
background:-moz-linear-gradient(-90deg, #9d0032, #7a0027); background:-webkit-gradient(linear, 0 top, 0 bottom, from(#9d0032), to(#7a0027)); }