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<!DOCTYPE html> <html> <head> <style> .flex-container { display: flex; background-color: DodgerBlue; } .flex-container > div { background-color: #f1f1f1; margin: 10px; padding: 20px; font-size: 30px; } </style> </head> <body> <div class="flex-container"> <div>1</div> <div>2</div> <div>3</div> </div> <p>Flexible 布局必须有一个父元素，其<em>display</em> 属性设置为<em>flex</em>。</p> <p>Flexible 容器的直接子元素自动成为 Flexible 的项目。</p> </body> </html>