W3Schools Tryit 编辑器 - W3Schools 中文教程

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<title>W3.CSS</title>
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<div class="w3-container">
<h2>Round Classes</h2>

<div class="w3-container w3-red w3-section w3-round-small">
  <p>The w3-round-small class adds a 2px rounded corner to an element.</p>
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<div class="w3-container w3-red w3-round">
  <p>The w3-round class adds a 4px rounded corner to an element.</p>
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<div class="w3-container w3-red w3-section w3-round-large">
  <p>The w3-round-large class adds a 8px rounded corner to an element.</p>
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<div class="w3-container w3-red w3-section w3-round-xlarge">
  <p>The w3-round-xlarge class adds a 16px rounded corner to an element.</p>
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<div class="w3-container w3-red w3-section w3-round-xxlarge">
  <p>The w3-round-xxlarge class adds a 32px rounded corner to an element.</p>
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<p>Used on images:</p>
<img class="w3-round" src="img_car.jpg" alt="Car" style="width:50%"><br><br>
<img class="w3-round-large" src="img_car.jpg" alt="Car" style="width:50%"><br><br>
<img class="w3-round-xlarge" src="img_car.jpg" alt="Car" style="width:50%"><br><br>
<img class="w3-round-xxlarge" src="img_car.jpg" alt="Car" style="width:50%"><br><br>

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