H2：层级不连续
页面上 H1 之后的下一级标题不是 H2（比如 H1 后直接跳到 H3）。标题应按层级依次递减，方便理解页面结构和使用读屏软件的访客。
如何修复：让 H1 之后的标题使用 H2，再往下才用 H3。常见原因是为了字号效果选了 H3/H4，应改用 H2 并通过样式调整字号。
Screaming Frog 英文原文
Pages with an <h2> that is not the second heading level after the <h1> on the page. Heading elements should be in a logical sequentially-descending order. The purpose of heading elements is to convey the structure of the page and they should be in logical order from <h1> to <h6>, which helps navigating the page and users that rely on assistive technologies.
How to fix: Ensure the <h2> is the second heading on the page. Headings should be in a logical sequential order from <h1> to <h6>. Review and update page heading levels so they are descending in order, for example the heading element following an <h1> should be an <h2>, rather than an <h3>.
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