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<!DOCTYPE html> <html> <head> <style> .flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: stretch; background-color: DodgerBlue; } .flex-container > div { background-color: #f1f1f1; width: 100px; margin: 10px; text-align: center; line-height: 75px; font-size: 30px; } </style> </head> <body> <h1>align-content 属性</h1> <p>"align-content: stretch;" 拉伸弹性线以占据剩余空间（默认）：</p> <div class="flex-container"> <div>1</div> <div>2</div> <div>3</div> <div>4</div> <div>5</div> <div>6</div> <div>7</div> <div>8</div> <div>9</div> <div>10</div> <div>11</div> <div>12</div> </div> </body> </html>