您可能看到有些参考资料建议对iPhone内容使用条件CSS。
You may see some references that recommend using conditional CSS for iPhone content.
清单6演示如何使用CSS - 3根据XForms输入中的class属性为不同的元素有条件地设置宽度。
Listing 6 shows how CSS-3 can be used to conditionally set the width inside different elements that each used a different class attribute in the XForms input.
这是因为如果在两个不同的文件中使用了同一个 CSS 类，它有可能使用非您预期的那个；因为它只会使用更符合条件的那个。
This is because if the same CSS class is used in two different files, it may use the one you are not expecting; it will use the one that is more qualified.
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