示例效果
这是一款CSS3彩色进度条动画特效。该进度条通过对bootstrap原生进度条的改造，制作出效果非常炫酷的进度条动画效果。
使用chrome浏览器去打开网页文件，运行效果如下图所示：
代码设计
利用HBulider开发工具创建jindutiao.html文件，代码如下所示：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>CSS3彩色进度条动画特效</title>
<link href="http://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="css/jindutiao.css"/>
</head>
<body>
<div>
<div>
<div>
<div class="col-md-offset-3 col-md-6">
<h3>HTML5</h3>
<div>
<div style="width:65%; background:#ef2d56;">
<div>65%</div>
</div>
</div>
<h3>CSS3</h3>
<div>
<div style="width:87%; background:#ff9900;">
<div>87%</div>
</div>
</div>
<h3>J-Query</h3>
<div>
<div style="width:55%; background:#82b700;">
<div>55%</div>
</div>
</div>
<h3>PHP</h3>
<div>
<div style="width:95%; background:#00ebdd;">
<div>95%</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
<script src="http://cdn.bootcss.com/jquery/1.11.0/jquery.min.js" type="text/javascript"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</html>
创建style.css用于存放制作进度条的各种样式，代码如下所示：
.demo{ background: #2c304a;padding: 2em 0; }
.progress-title{
font-size: 18px;
font-weight: 700;
color: #fff;
margin: 0 0 20px;
}
.progress{
height: 20px;
background: #171b3c;
border-radius: 20px;
border: 1px solid #000;
box-shadow: 0 2px 2px #4f4c4c;
margin-bottom: 40px;
overflow: visible;
position: relative;
}
.progress .progress-bar{
border-radius: 20px;
border: 1px solid #000;
-webkit-animation: animate-positive 2s;
animation: animate-positive 2s;
}
.progress .progress-value{
width: 65px;
height: 25px;
line-height: 25px;
background: #171b3c;
font-size: 15px;
color: #fff;
border-radius: 0 0 15px 15px;
border: 1px solid #000;
border-top: none;
box-shadow: 0 2px 2px #4f4c4c;
position: absolute;
bottom: -25px;
right: 60px;
}
@-webkit-keyframes animate-positive{
0% { width: 0; }
}
@keyframes animate-positive{
0% { width: 0; }
}
