使用 margin-left：auto; margin-right：auto; 应该会有你想要的效果。它们将基本上将containerdiv放在body标签中。您可以随时通过将容器的宽度减小到可以在浏览器中测试的值来自行测试（Chrome和Firefox的开发工具对于在浏览器中使用CSS非常有用）。

Using margin-left: auto; margin-right: auto; should have the desired effect for you. They will basically centre the "container" div in the body tag. You could always test it out yourself by reducing the width of the container to something you can test in your browser (Chrome and Firefox's dev tools are useful for playing with CSS within the browser).