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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap 实例</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <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> </head> <body> <div class="container-fluid mt-3"> <h2>设置一列宽度</h2> <p>只设置一列的宽度就足够了，并让兄弟列在周围自动调整尺寸。下例将创建 25%/50%/25% 的拆分：</p> <div class="row"> <div class="col bg-success">.col</div> <div class="col-6 bg-warning">.col-6</div> <div class="col bg-success">.col</div> </div> </div> </body> </html>