使用css画出一个五角星

使用 CSS 绘制一个五角星可以通过多种方式完成，其中一种是使用 ::before 和 ::after 伪元素以及 border 属性。以下是一个简单的示例：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>五角星 CSS</title>
    <style>
        .star {
            position: relative;
            width: 0;
            height: 0;
            border-right: 100px solid transparent;
            border-bottom: 70px solid red;
            border-left: 100px solid transparent;
            transform: rotate(35deg);
            margin: 50px;
        }

        .star::before {
            content: "";
            position: absolute;
            top: 3px;
            left: -60px;
            width: 0;
            height: 0;
            border-right: 60px solid transparent;
            border-bottom: 70px solid red;
            border-left: 60px solid transparent;
            transform: rotate(-35deg);
        }

        .star::after {
            content: "";
            position: absolute;
            top: -33px;
            left: -20px;
            width: 0;
            height: 0;
            border-right: 60px solid transparent;
            border-bottom: 70px solid red;
            border-left: 60px solid transparent;
            transform: rotate(-35deg);
        }
    </style>
</head>
<body>
    <div class="star"></div>
</body>
</html>