响应式屏幕宽度使用min函数.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      body {
        display: flex;
        justify-content: center;
      }
      .wrapper {
        width: min(100%, 500px);
        height: 100px;
        background: #000;
      }
    </style>
  </head>
  <body>
    <!-- 在屏幕宽度不足 500px 时候，也就表现为 width: 100%，反之，则表现为 width: 500px -->
    <div class="wrapper">Container</div>
  </body>
</html>