W3School TIY Editor
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暗黑模式
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<!DOCTYPE html> <html> <head> <meta name="viewport" content="width=device-width, initial-scale=1"> <!-- 添加图标库 --> <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"> <style> .btn { background-color: DodgerBlue; border: none; color: white; padding: 12px 30px; cursor: pointer; font-size: 20px; } /* 鼠标悬停时背景变暗 */ .btn:hover { background-color: RoyalBlue; } </style> </head> <body> <h2>下载按钮</h2> <p>自动宽：</p> <button class="btn"><i class="fa fa-download"></i> Download</button> <p>全宽：</p> <button class="btn" style="width:100%"><i class="fa fa-download"></i> Download</button> </body> </html>