lovecoding
/
W250913


			
				
					
						
						
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							<!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: 0;
            outline: none;
        }
    </style>
</head>
<body>
    <!-- 文本框 placeholder 占位符 -->
    <input type="text" placeholder="请输入用户名">
</body>
</html>