Typography refresh/zh

目标
Type is a core visual element of Wikipedia's language. The (opt in) typography update is based on these needs -

Readability: Typefaces must be legible and readable at all sizes. Type as an element must help differentiate interface from article content.

Accessibility: Dyslexia and visual impairments must not get in the way of access. We must enable access for users with impairments

Availability: All typefaces we use must be already available, or made available. Any selections must degrade gracefully across devices and platforms (OS X, Windows, Linux, Mobile Platforms)

Consistency: A consistent visual experience across desktop and mobile.

主要更新
TLDR:这次的主要更新包括：对标题使用衬线字体（如宋体）对正文使用非衬线字体（如黑体）以及减小导航栏的尺寸.

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标题字体组： Georgia, serif; 衬线体标题已经在维基百科移动版上测试并收到了积极的回应. [来源请求]这些变更将应用于桌面，我们的希望桌面版和移动版之间的风格可以一致.

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Body copy font-family: "Helvetica Neue", "Helvetica", "Nimbus Sans L", "Arial", "Liberation Sans", sans-serif; While Georgia and Helvetica are fonts optimized for the web, we can see that body gracefully degrades to Arial because it is freely available on nearly every computer and operating system while being a screen-friendly typeface. After that, there is a free font, Liberation Sans, and finally a fallback that is always available, sans-serif. This selection may change as other typefaces develop ubiquity. For the near future, Arial will continue to serve as WMF's fallback. On Linux-based operating systems, Nimbus Sans L & Liberation Sans will be specified as the san-serif fonts. Note that free systems may also substitute other free fonts for proprietary ones mentioned earlier in the stack.

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Reduced type size for navigational elements: Type size for navigation elements in the sidebar are reduced by 0.1–0.3 em to help them fade to the background in comparison to the article which is the foreground. Since the navigation areas are distinct, we expect that changes in the size will not hamper clicking on the links.

实施
如果你有进一步了解该测试背后详细的技术原理的兴趣的话，你可以阅读更多.