每个段落首行不缩进，其余各行都缩进一定距离的技术
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<html xmlns="http://www.w3.org/1999/xhtml">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>悬挂缩进</title>
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p {
width: 200px;
padding-left: 2em;
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p:first-letter {
margin-left: -2em;
}
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<h4>悬挂缩进</h4>
<p> The length of the first line depends on a number of factors, such as the width of the page and the font size.</p>
<p> The :first-line pseudo-element can be attached to block-level elements. It can be attached to inline elements if you set the corresponding display property to block.</p>
</body>
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