哪里出错了

来源：2-7 编程练习

qq_哦_36

2018-08-02 17:30:39

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>2-2</title>
    <style type="text/css">
        div {
            font-family: 'Microsoft Yahei';
            font-size: 60px;
            font-weight: bold;
            line-height: 600px;
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            width: 800px;
            height: 600px;
            margin: auto;
            text-align: center;
            border: 5px solid #000;
            border-radius: 50%;
            /*此处写代码*/
            animation-name:cansee;
            animation-delay:10s;
       }
          @keyframes cansee{
              from{
                  color: transparent;
                  border: 5px solid transparent;
              }
              to{
                  color: #000000;
                  border: 5px solid #000000;
              }
          }
   </style>
</head>
<body>
    <div>大家好，欢迎来到慕课网！</div>
</body>
</html>