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<title>Bootstrap 实例</title>
<meta charset="utf-8">
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<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.2/dist/js/bootstrap.bundle.min.js"></script>
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<div class="container mt-3">
<h1>间距 Utility</h1>
<p>使用 {property. {Sides} - {breakpoint} - {size} 类设置元素的间距。如果您希望填充或边距适用于所有屏幕尺寸，请省略断点。</p> <div class="pt-4 bg-warning">我只有上内边距 (1.5rem)</div>
<div class="p-5 bg-success">我在所有边都有内边距 (3rem)</div>
<div class="m-5 pb-5 bg-info">我在所有边都有外边距 (3rem) 和下内边距 (3rem)</div>
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