这个效果是一个CSS3制作的时钟，不过并不是我们传统的时钟风格，分别用三块显示
时、分、秒三个部分，而且这个DEMO中藤藤还为其加上了一个js的效果，能让这个效
果和现实时钟的时间同步。这个效果运用到的CSS3知识点就是渐变、阴影，而最为关键
的就是CSS3的渐变制作。
HTML结构:
<div class="box"> <ul> <li><span id="hour"></span><span>Hours</span></li> <li><span id="minute"></span><span>Minutes</span></li> <li><span id="second"></span><span>Seconds</span></li> </ul> </div>
CSS代码：
body,ul,li{
padding: 0;
margin:0;
}
a {
color: rgb(1, 124, 185);
text-decoration: none;
}
body{
font-size:16px;
color: #5a5d63;
background: #d6d7d9;
background: -webkit-radial-gradient(#eeefef, #d6d7d9);
background: -moz-radial-gradient(#eeefef, #d6d7d9);
background: -o-radial-gradient(#eeefef, #d6d7d9);
background: -ms-radial-gradient(#eeefef, #d6d7d9);
background: radial-gradient(#eeefef, #d6d7d9);
padding: 50px;
}
.box{
540px;
height: 200px;
margin: 50px auto;
}
.box li{
position: relative;
text-align: center;
list-style-type: none;
display: inline-block;
150px;
height:160px;
text-shadow:0 2px 1px #f4f4f4;
border:1px solid #9fa2ad;
border-radius: 5px;
margin-right:10px;
background: -webkit-gradient(linear,0 0, 0 100%,
color-stop(.2,rgba(248,248,248,.3)),
color-stop(.5,rgba(168,173,190,.5)),
color-stop(.51,rgba(168,173,190,.3)),
color-stop(.9,rgba(248,248,248,.2)));
background: -webkit-linear-gradient(top,rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%, rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);
background: -moz-linear-gradient(top, rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%, rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);
background: -o-linear-gradient(top,rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%, rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);
background: -ms-linear-gradient(top, rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%,rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);
background: linear-gradient(top,rgba(248,248,248,.3) 20%,rgba(168,173,190,.5) 50%,rgba(168,173,190,.3) 51%,rgba(248,248,248,.2) 90%);
box-shadow:inset 0 -2px 0 #f1f1f1,0 1px 0 #f1f1f1,0 2px 0 #9fa2ad,0 3px 0 #f1f1f1,0 4px 0 #9fa2ad;
}
.box li:before,
.box li:after{
display: block;
content: "";
position: absolute;
150px;
}
.box li:before{
top:50%;
height: 1px;
box-shadow: 0 1px 0 #868995,0 2px 1px #fff;
}
.box li:after{
bottom: -65px;
height: 60px;
border-radius:0 0 5px 5px;
background: -webkit-gradient(linear,0 0,0 100%,from(rgba(0,0,0,.1)),to(rgba(0,0,0,0)));
background: -webkit-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0));
background: -moz-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0));
background: -o-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0));
background: -ms-linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0));
background: linear-gradient(top,rgba(0,0,0,.1),rgba(0,0,0,0));
z-index: 1
}
.box li span:first-child{
font:120px 'BitstreamVeraSansMonoBold';
color: #52555a;
display: block;
height: 130px;
line-height: 150px;
}
@font-face {
font-family: 'BitstreamVeraSansMonoBold';
src: url('VeraMono-Bold-webfont.eot');
src: url('VeraMono-Bold-webfont.eot?#iefix') format('embedded-opentype'),
url('VeraMono-Bold-webfont.woff') format('woff'),
url('VeraMono-Bold-webfont.ttf') format('truetype'),
url('VeraMono-Bold-webfont.svg#BitstreamVeraSansMonoBold') format('svg');
font-weight: normal;
font-style: normal;
}
JS代码：
var hour=document.getElementById('hour');
var minute=document.getElementById('minute');
var second=document.getElementById('second');
function showTime(){
var oDate=new Date();
var iHours=oDate.getHours();
var iMinute=oDate.getMinutes();
var iSecond=oDate.getSeconds();
hour.innerHTML=AddZero(iHours);
minute.innerHTML=AddZero(iMinute);
second.innerHTML=AddZero(iSecond);
}
showTime();
setInterval(showTime,1000);
function AddZero(n){
if(n<10){
return '0'+n;
}
return ''+n;
}
出处：