| 1234567891011121314151617181920212223242526 | <!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <meta name="viewport" content="width=device-width, initial-scale=1.0">    <title>Document</title>    <style>        input {            border: 1px solid #f00;            /*                 轮廓 outline 复合属性                    1.none 取消轮廓                    2.width style color;            */            outline: none;            outline: 2px solid #00f;            outline-width: 10px;            outline-style: dotted;            outline-color: aqua;        }    </style></head><body>    <input type="text"></body></html>
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