demo
<!doctype html> <title>demo测试</title> <meta charset="utf-8"/> <meta name="keywords" content="demo测试" /> <meta name="description" content="demo测试" /> <style type="text/css"> * { margin:0; padding:0; } h1 { text-align:center; background: #999; color: #fff; } .demo { margin: 20px auto; height:100px; line-height:100px; text-align:center; width:100px; background: #ccc; color: #fff; } </style> </head> <body> <h1>demo测试</h1> <div class="demo"> demo </div> </body> </html>
运行代码
ps：由于本人较笨，折腾了一个晚上，终于能在页面runcode了，呼呼~好开心( ⊙ o ⊙ )啊！
