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Inline-level elements are those elements of the source document that do not form new blocks of content; the content is distributed in lines (e.g., emphasized pieces of text within a paragraph, inline images, etc.). Several values of the 'display' property make an element inline: 'inline', 'inline-table', 'inline-block' and 'run-in' (part of the time; see run-in boxes ). Inline-level elements generate inline boxes.
关于z-index的那些事儿 每一个在HTML文档中的元素既可以在其他元素的前面，也可以在其他元素的后面。这就是所谓的堆栈顺序。决定这个顺序的规则被十分清楚的定义在说明文档中，但是就像之前我已经提到过，... 扁平化设计与可访问性
June 21, 2004 I've been practicing information architecture since 1994, and from Gopher to Google have seen dramatic changes in the landscape of organization, search and retrieval. Through these ten tempestuous years, I've found the infamous three circle diagram to be a great tool for explaining how and why we must strike a unique balance on each project between business goals and context, user needs and behavior, and the available mix of content.