只能影响iframe本身，而不是iframe内容（例如 iframe body ），你不能用css来做到这一点。话虽如此，你可以通过javascript访问iframe的内容。有了jQuery，它会是这样的：

As via css it is only possible to affect the iframe itself, not the iframe contents (eg iframe body), you can't do this with css. That being said, you can access the contents of an iframe via javascript. With jQuery it would be something like:

$('iframe').contents().find(body).css('zoom', yourvalue);