abstract：<html><head><meta charset="utf-8"><title>Hello ,html</title><style type="text/css">*{margin:0;padding:0;}.content{border:1px solid #444；backgrou
<html>
<head>
<meta charset="utf-8">
<title>Hello ,html</title>
<style type="text/css">
*{
margin:0;
padding:0;
}
.content{
border:1px solid #444；
background:lightgreen;
margin:0 auto;
}
.content p{
text-align:center;
}
</style>
<body>
<div class="content">
<p style="color:red;font-size:14px;">Hello,PHP中文网，我来学习了</p>
</div>
</body>
</html>