drop-shadow整体添加阴影

于2022-12-12 15:24:24发布
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=q, initial-scale=1.0">
    <title>Document</title>
    <style>
        .ctx {
            width: 200px;
            height: 200px;
            position: relative;
            background: #fff;
            margin: 100px auto;
            filter: drop-shadow(0 0 3px #888);
        }
        .ctx::after {
            position: absolute;
            content: '';
            width: 0;
            height: 0;
            border-top: 10px solid transparent;
            border-left: 10px solid transparent;
            border-right: 10px solid transparent;
            border-bottom: 10px solid #fff;
            top: -20px;
            left: 20px;
        }
    </style>
</head>
<body>
    <div class="ctx"></div>
</body>
</html>
运行效果