vue input改变下边框颜色

求各位大佬帮我看看这怎么改

打开控制台找一下这个input的类名然后去全局里修改

focus就给他的下边框加个颜色即可

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        input:focus {
            border-bottom: 2px solid red;
            /* outline:none; */
        }
      
    </style>
</head>

<body>
    <input type="text">
</body>

</html>