<h4>参照：<a href='http://www.htmldrive.net/items/show/657/Animated-Bubble-Buttons-CSS3.html' target='_blank'>Animated Bubble Buttons CSS3</a></h4>
<style type="text/css">
#dark {
background-color:#333;
border:1px solid #000;
margin:20px auto;padding:20px;
color:#fff;
}
#light{
background-color:#fff;
border:1px solid #dedede;
margin:20px auto;padding:20px;
}
.button{
font:15px Calibri, Arial, sans-serif;
/* A semi-transparent text shadow */
text-shadow:1px 1px 0 rgba(255,255,255,0.4);
/* Overriding the default underline styling of the links */
text-decoration:none !important;
white-space:nowrap;
display:inline-block;
vertical-align:baseline;
position:relative;
cursor:pointer;
padding:10px 20px;
background-repeat:no-repeat;
/* The following two rules are fallbacks, in case
the browser does not support multiple backgrounds. */
background-position:bottom left;
background-image:url(/content/img/css/button_bg.png);
/* Multiple backgrounds version. The background images
are defined individually in color classes */
background-position:bottom left, top right, 0 0, 0 0;
background-clip:border-box;
/* Applying a default border raidus of 8px */
-moz-border-radius:8px;
-webkit-border-radius:8px;
border-radius:8px;
/* A 1px highlight inside of the button */
-moz-box-shadow:0 0 1px #fff inset;
-webkit-box-shadow:0 0 1px #fff inset;
box-shadow:0 0 1px #fff inset;
/* Animating the background positions with CSS3 */
/* Currently works only in Safari/Chrome */
-webkit-transition:background-position 1s;
-moz-transition:background-position 1s;
transition:background-position 1s;
}
#dark .button{
-moz-box-shadow:0 0 1px #333 inset;
-webkit-box-shadow:0 0 1px #333 inset;
box-shadow:0 0 1px #333 inset;
}
.button:hover{
/* The first rule is a fallback, in case the browser
does not support multiple backgrounds
*/
background-position:top left;
background-position:top left, bottom right, 0 0, 0 0;
}
.button:active{
/* Moving the button 1px to the bottom when clicked */
bottom:-1px;
}
/* The three buttons sizes */
.button.big { font-size:30px;}
.button.medium { font-size:18px;}
.button.small { font-size:13px;}
/* A more rounded button */
.button.rounded{
-moz-border-radius:4em;
-webkit-border-radius:4em;
border-radius:4em;
}
/* Defining four button colors */
/* BlueButton */
.blue.button{
color:#0f4b6d !important;
border:1px solid #84acc3 !important;
/* A fallback background color */
background-color: #48b5f2;
/* Specifying a version with gradients according to */
background-image: url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png),
-moz-radial-gradient( center bottom, circle,
rgba(89,208,244,1) 0,rgba(89,208,244,0) 100px),
-moz-linear-gradient(#4fbbf7, #3faeeb);
background-image: url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png),
-webkit-gradient( radial, 50% 100%, 0, 50% 100%, 100,
from(rgba(89,208,244,1)), to(rgba(89,208,244,0))),
-webkit-gradient(linear, 0% 0%, 0% 100%, from(#4fbbf7), to(#3faeeb));
}
.blue.button:hover{
background-color:#63c7fe;
background-image: url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png),
-moz-radial-gradient( center bottom, circle,
rgba(109,217,250,1) 0,rgba(109,217,250,0) 100px),
-moz-linear-gradient(#63c7fe, #58bef7);
background-image: url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png),
-webkit-gradient( radial, 50% 100%, 0, 50% 100%, 100,
from(rgba(109,217,250,1)), to(rgba(109,217,250,0))),
-webkit-gradient(linear, 0% 0%, 0% 100%, from(#63c7fe), to(#58bef7));
}
/* Green Button */
.green.button{
color:#345903 !important;
border:1px solid #96a37b !important;
background-color: #79be1e;
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -moz-radial-gradient(center bottom, circle, rgba(162,211,30,1) 0,rgba(162,211,30,0) 100px),-moz-linear-gradient(#82cc27, #74b317);
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(162,211,30,1)), to(rgba(162,211,30,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#82cc27), to(#74b317));
}
.green.button:hover{
background-color:#89d228;
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -moz-radial-gradient(center bottom, circle, rgba(183,229,45,1) 0,rgba(183,229,45,0) 100px),-moz-linear-gradient(#90de31, #7fc01e);
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(183,229,45,1)), to(rgba(183,229,45,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#90de31), to(#7fc01e));
}
/* Orange Button */
.orange.button{
color:#693e0a !important;
border:1px solid #bea280 !important;
background-color: #e38d27;
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -moz-radial-gradient(center bottom, circle, rgba(232,189,45,1) 0,rgba(232,189,45,0) 100px),-moz-linear-gradient(#f1982f, #d4821f);
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(232,189,45,1)), to(rgba(232,189,45,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#f1982f), to(#d4821f));
}
.orange.button:hover{
background-color:#ec9732;
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -moz-radial-gradient(center bottom, circle, rgba(241,192,52,1) 0,rgba(241,192,52,0) 100px),-moz-linear-gradient(#f9a746, #e18f2b);
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(241,192,52,1)), to(rgba(241,192,52,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#f9a746), to(#e18f2b));
}
.gray.button{
color:#525252 !important;
border:1px solid #a5a5a5 !important;
background-color: #a9adb1;
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -moz-radial-gradient(center bottom, circle, rgba(197,199,202,1) 0,rgba(197,199,202,0) 100px),-moz-linear-gradient(#c5c7ca, #92989c);
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(197,199,202,1)), to(rgba(197,199,202,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#c5c7ca), to(#92989c));
}
.gray.button:hover{
background-color:#b6bbc0;
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -moz-radial-gradient(center bottom, circle, rgba(202,205,208,1) 0,rgba(202,205,208,0) 100px),-moz-linear-gradient(#d1d3d6, #9fa5a9);
background-image:url(/content/img/css/button_bg.png), url(/content/img/css/button_bg.png), -webkit-gradient(radial, 50% 100%, 0, 50% 100%, 100, from(rgba(202,205,208,1)), to(rgba(202,205,208,0))),-webkit-gradient(linear, 0% 0%, 0% 100%, from(#d1d3d6), to(#9fa5a9));
}
</style>
<div id="light">
<p>白背景</p>
<div id="buttonContainer">
<p>
<a href="#" class="button big blue">Big Button</a>
<a href="#" class="button big green">Big Button</a>
<a href="#" class="button big orange">Big Button</a>
<a href="#" class="button big gray">Big Button</a>
</p>
<p>
<a href="#" class="button blue medium">Medium Button</a>
<a href="#" class="button green medium">Medium Button</a>
<a href="#" class="button orange medium">Medium Button</a>
<a href="#" class="button gray medium">Medium Button</a>
</p>
<p>
<a href="#" class="button small blue">Small Button</a>
<a href="#" class="button small green">Small Button</a>
<a href="#" class="button small blue rounded">Rounded</a>
<a href="#" class="button small orange">Small Button</a>
<a href="#" class="button small gray">Small Button</a>
<a href="#" class="button small green rounded">Rounded</a>
</p>
<p>
<input type="button" class="button big blue" value="Input Button" />
<input type="button" class="button medium green" value="Input Button" />
<input type="button" class="button small orange" value="Input Button" />
</p>
<p>
<button class="button big blue">Button</button>
<button class="button medium green">Button</button>
<button class="button small orange">Button</button>
</p>
</div>
</div>
<div id="dark">
<p>黒背景</p>
<div id="buttonContainer">
<p>
<a href="#" class="button big blue">Big Button</a>
<a href="#" class="button big green">Big Button</a>
<a href="#" class="button big orange">Big Button</a>
<a href="#" class="button big gray">Big Button</a>
</p>
<p>
<a href="#" class="button blue medium">Medium Button</a>
<a href="#" class="button green medium">Medium Button</a>
<a href="#" class="button orange medium">Medium Button</a>
<a href="#" class="button gray medium">Medium Button</a>
</p>
<p>
<a href="#" class="button small blue">Small Button</a>
<a href="#" class="button small green">Small Button</a>
<a href="#" class="button small blue rounded">Rounded</a>
<a href="#" class="button small orange">Small Button</a>
<a href="#" class="button small gray">Small Button</a>
<a href="#" class="button small green rounded">Rounded</a>
</p>
<p>
<input type="button" class="button big blue" value="Input Button" />
<input type="button" class="button medium green" value="Input Button" />
<input type="button" class="button small orange" value="Input Button" />
</p>
<p>
<button class="button big blue">Button</button>
<button class="button medium green">Button</button>
<button class="button small orange">Button</button>
</p>
</div>
</div>