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0509作业——制作太极图
一把青的博客
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<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>太极图作业</title>
    <style type="text/css">
        .background {
            width: 400px;
            height: 400px;
            margin: 0 auto;
            background-color: gold;
            padding-top: 99px;
            box-sizing: border-box;
        }
        .circle-box {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            /*border: 1px solid #ff0000;*/
            position: relative;
            background: #fff;
            margin: 0 auto;
            overflow: hidden;
        }
        .bg-mask {
            width: 100%;
            height: 100px;
            background-color: #000;
        }
        .circle-black-m,.circle-white-m{
            width: 100px;
            height: 100px;
            border-radius: 50%;
        }
        .circle-black-m {
            background-color: #000;
            position: absolute;
            top: 51px;
        }
        .circle-white-m {
            background-color: #fff;
            /*border: 1px solid #ff0000;*/
            position: absolute;
            top: 50px;
            right: 0;
        }
        .circle-white,.circle-black {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            position: absolute;
        }
        .circle-white {
            background-color: #fff;
            top: 45px;
            left: 35px;
        }
        .circle-black {
            background-color: #000;
            top: 25px;
            left: 35px;
        }
        /*鼠标经过变色*/
        /*.circle-box:hover {
            background: #000;
        }
        .circle-box:hover .bg-mask{
            background-color: #fff;
        }*/
        /* 动画代码 */
        @keyframes turnZ {
          0%   {transform: rotateZ(360deg);}
          100% {transform: rotateZ(0deg);}
        }

        /* 应用动画的元素 */
        .circle-box:hover {
          animation-name: turnZ;
          animation-duration: 4s;
          animation-iteration-count: 1;
        }

    </style>
</head>
<body>
    <div class="background">
        <div class="circle-box">
            <div class="bg-mask"></div>
            <div class="circle-black-m">
                <div class="circle-white"></div>
            </div>
            <div class="circle-white-m">
                <div class="circle-black"></div>
            </div>
        </div>
    </div>
</body>
</html>
Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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