CSS3初体验之伪元素选择器

使用CSS3中的伪元素选择器加HTML5实现太极八卦图
效果图：
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>太极八卦</title>
    <style>
        body {
            background-color: rgb(24, 147, 168);
        }
        .father {
            position: relative;
            top: 100px;
            left: 60%;
            width: 400px;
            height: 400px;
            /* background-color: #; */
            /* margin: 100px 0 0 25%; */
            border-radius: 50%;
            overflow: hidden;
            /* transform:rotate(360deg); */
            transition: all 10s;
        }
        .father1 {
            position: relative;
            top: -300px;
            left: 20%;
            width: 400px;
            height: 400px;
            /* background-color: #; */
            /* margin: 100px 25% 0 0; */
            border-radius: 50%;
            overflow: hidden;
            /* transform:rotate(360deg); */
            transition: all 5s;
        }
        .son-l {
            float: left;
            width: 200px;
            height: 400px;
            /* border-radius: 50%; */
            background-color: #fff;
        }
        .son-r {
            float: left;
            width: 200px;
            height: 400px;
            background-color: #000;
        }
        .father::before,
        .father1::before {
            position: absolute;
            top: 0;
            left: 50%;
            margin-left: -100px;
            width: 200px;
            height: 200px;
            content: "";
            background-color: #000;
            border-radius: 50%;
        }
        .father1::after,
        .father::after {
            position: absolute;
            bottom: 0;
            left: 50%;
            margin-left: -100px;
            width: 200px;
            height: 200px;
            content: "";
            background-color: #fff;
            border-radius: 50%;
        }
        .son-t {
            position: absolute;
            top: 50px;
            left: 50%;
            margin-left: -50px;
            width: 100px;
            height: 100px;
            background-color: #fff;
            border-radius: 50%;
        }
        .son-b {
            position: absolute;
            bottom: 50px;
            left: 50%;
            margin-left: -50px;
            width: 100px;
            height: 100px;
            background-color: #000;
            border-radius: 50%;
            z-index: 1;
           
        }
        /* .father:hover, */
        body:hover .father , 
        body:hover .father1 {
            transform: rotate(36000deg);
            /* width: 600px; */
        }
    </style>
</head>
<body>
    <div class="father">
        <div class="son-l">      
        </div>
        <div class="son-r">
        </div>
        <div class="son-t"></div>
        <div class="son-b"></div>
    </div>
    <div class="father1">
            <div class="son-l">      
            </div>
            <div class="son-r">
            </div>
            <div class="son-t"></div>
            <div class="son-b"></div>
        </div>
</body>
</html>
CSS3初体验之伪元素选择器

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