CSS用类选择器在本页写样式
<title>静夜思</title>
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p{color:#ff0000; font-size:24px; font-family:"隶书";}
h1{color:#0000ff;}
.green{color:#00ff00; font-family:"宋体"; font-weight:bold;}
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</head>
<body>
<h1>静夜思</h1>
<p>床前明月光，</p>
<p class="green">疑是地上霜。</p>
<p>举头望明月，</p>
<p class="green">低头思故乡。</p>
</body>
