最终的效果图（仅支持FF 3.6、Chrome 4、Safari 4）：
完整示例代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>使用CSS3模拟的iphone键盘</title>
<meta name="generator" content="editplus" />
<meta name="author" content="" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<style type="text/css">
@font-face {
font-family: 'iPhone keyboard';
src: url(http://cahty.googlecode.com/svn/trunk/css/iphone-keyboard.ttf);
}
body {
margin:0;
color:gray;
font-family:Helvetica, Arial, sans-serif;
}
#iphone-keyboard {
max-480px;
margin:10px auto;
padding:0;
overflow:hidden;
border-top:1px solid #3A3D42;
background:#757D8A;
background-image:-moz-linear-gradient(#9098A3, #454f5d);
background-image:-webkit-gradient(linear, left top, left bottom, from(#9098A3), to(#454f5d));
box-shadow:0 1px 0 rgba(255,255,255,.3) inset;
-moz-box-shadow:0 1px 0 rgba(255,255,255,.3) inset;
-webkit-box-shadow:0 1px 0 rgba(255,255,255,.3) inset;
}
#iphone-keyboard li {
text-align:center;
margin:.5em .1em .25em;
list-style:none;
}
#iphone-keyboard li:first-child {
margin-top:.3em;
}
#iphone-keyboard button,
#iphone-keyboard button.specialkey:active {
color:#3A3D42;
text-decoration:none;
text-align:center;
text-shadow:0 1px 1px white;
font-weight:bold;
border:0;
border-top:1px solid rgba(255,255,255,.45);
background:#ECEDEF;
background-image:-moz-linear-gradient(#f8f8f9, #dddfe1);
background-image:-webkit-gradient(linear, left top, left bottom, from(#f8f8f9), to(#dddfe1));
border-radius:4px;
-moz-border-radius:4px;
-webkit-border-radius:4px;
box-shadow:0 1px 3px rgba(0,0,0,.7), 0 1px 0 rgba(0,0,0,.3);
-moz-box-shadow:0 1px 3px rgba(0,0,0,.7), 0 1px 0 rgba(0,0,0,.3);
-webkit-box-shadow:0 1px 3px rgba(0,0,0,.7), 0 1px 0 rgba(0,0,0,.3);
}
#iphone-keyboard button {
display:inline-block;
8.6%;
margin:0 .25%;
padding:.02em 0 .03em;
color:black;
font-size:1.35em;
font-family:Helvetica, Arial, sans-serif;
}
#iphone-keyboard button:active,
#iphone-keyboard button.space:active {
background-image:-moz-linear-gradient(#E2E3E4, #AAADB4);
background-image:-webkit-gradient(linear, left top, left bottom, from(#E2E3E4), to(#AAADB4));
}
#iphone-keyboard button.specialkey {
background:#757D8A;
background-image:-moz-linear-gradient(#7f8792, #535b68);
background-image:-webkit-gradient(linear, left top, left bottom, from(#7f8792), to(#535b68));
color:white;
text-shadow:0 -1px 1px rgba(0,0,0,.5);
}
#iphone-keyboard button.space,
#iphone-keyboard button.return,
#iphone-keyboard button.numbers,
#iphone-keyboard button.international {
font-size:1.04em;
padding:.25em 0;
}
#iphone-keyboard button.shift,
#iphone-keyboard button.international,
#iphone-keyboard button.backspace {
font-family:'iPhone keyboard', Helvetica, sans-serif;
}
#iphone-keyboard button.shift,
#iphone-keyboard button.backspace {
background-image:-moz-linear-gradient(#939ba6, #687180);
background-image:-webkit-gradient(linear, left top, left bottom, from(#939ba6), to(#687180));
}
#iphone-keyboard button.shift {
12%;
float:left;
}
#iphone-keyboard button.backspace {
12%;
float:right;
}
#iphone-keyboard button.numbers {
8.4%;
margin-right:1.4%;
float:left;
}
#iphone-keyboard button.international {
8.2%;
float:left;
}
#iphone-keyboard button.space {
59%;
color:#525c69;
background-image:-moz-linear-gradient(#dddfe2, #b4b8bf);
background-image:-webkit-gradient(linear, left top, left bottom, from(#dddfe2), to(#b4b8bf));
}
#iphone-keyboard button.return {
float:right;
18.9%;
}
</style>
</head>
<body>
<ul id="iphone-keyboard">
<li>
<button type="button">Q</button>
<button type="button">W</button>
<button type="button">E</button>
<button type="button">R</button>
<button type="button">T</button>
<button type="button">Y</button>
<button type="button">U</button>
<button type="button">I</button>
<button type="button">O</button>
<button type="button">P</button>
</li>
<li>
<button type="button">A</button>
<button type="button">S</button>
<button type="button">D</button>
<button type="button">F</button>
<button type="button">G</button>
<button type="button">H</button>
<button type="button">J</button>
<button type="button">K</button>
<button type="button">L</button>
</li>
<li>
<button type="button" class="specialkey shift">S</button>
<button type="button">Z</button>
<button type="button">X</button>
<button type="button">C</button>
<button type="button">V</button>
<button type="button">B</button>
<button type="button">N</button>
<button type="button">M</button>
<button type="button" class="specialkey backspace">B</button>
</li>
<li>
<button type="button" class="specialkey numbers">123</button>
<button type="button" class="specialkey international">I</button>
<button type="button" class="space">space</button>
<button type="button" class="specialkey return">return</button>
</li>
</ul>
</body>
</html>
使用了CSS中的：字体、渐变、阴影。
在本页面直接运行查看效果：