<h2>按钮大小</h2> <p>我们可以使用 font-size 属性来设置按钮大小:</p> <button class="button button1">10px</button> <button class="button button2">12px</button> <button class="button button3">16px</button> <button class="button button4">20px</button> <button class="button button5">24px</button>