原文代码：https://segmentfault.com/a/1190000014768534#articleHeader1
HTML代码：
<html>
<head>
<link rel="stylesheet" href="index.css">
</head>
<body>
<div class="card">
<h2>Development Skills</h2>
<p class="skill html">
<span>HTML5</span>
<span class="level">90%</span>
</p>
<p class="skill css">
<span>CSS</span>
<span class="level">95%</span>
</p>
<p class="skill javascript">
<span>JavaScript</span>
<span class="level">80%</span>
</p>
<p class="skill svg">
<span>SVG</span>
<span class="level">60%</span>
</p>
<p class="skill canvas">
<span>Canvas</span>
<span class="level">75%</span>
</p>
</div>
</body>
</html>
CSS代码：
html, body {
margin:;
padding:;
height: 100%;
display: flex;
justify-content: center;
align-items: center;
/* linear-gradient：线性梯度；dimgray:暗灰色； silver: 银色 */
background: linear-gradient(dimgray, silver, silver, dimgray);
}
.card{
width:400px;
background: linear-gradient(#333, dimgray);
/* 并排放置两个带边框的框 */
box-sizing: border-box;
padding: 20px;
font-family: sans-serif;
color: white;
/* 单个字符间间距 */
letter-spacing: 0.1em;
/* 添加阴影 水平位置 垂直位置 模糊距离 颜色 */
box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}
.card h2{
/* 字母: 大写 */
text-align: center;
text-transform: uppercase;
}
.card .skill{
height: 50px;
}
.card .skill span{
display: block;
}
.card .skill .level{
transform: translateY(-1em);
text-align: right;
position: relative;
}
/* 用伪元素画出条形图 */
.card .skill .level::before,
.card .skill .level::after{
content: '';
width: 100%;
height: 100%;
position: absolute;
top: 1.2em;
left:;
}
.card .skill .level::before{
border: 1px solid mediumspringgreen;
border-radius: 0.2em;
height: 105%;
}
.card .skill .level::after{
background-image: linear-gradient(to right,mediumspringgreen,mediumspringgreen);
background-repeat: no-repeat;
background-position: top 0.1em left 0.1em;
}
/* 设置条形图的填充比例 */
.card .html .level::after {
background-size: 90% 1em;
}
.card .css .level::after {
background-size: 95% 1em;
}
.card .javascript .level::after {
background-size: 80% 1em;
}
.card .svg .level::after {
background-size: 60% 1em;
}
.card .canvas .level::after {
background-size: 75% 1em;
}
.card .skill:hover {
background-color: #333;
}