The header image cannot be displayed and There is also an issue with the table of contents style of the document

[cs-sky]

Describe the bug
The header image cannot be displayed, and the style of the header is also misplaced. Some pages do not display the entire header。

There is an issue with the style of the document's table of contents, and clicking on the specific chapter in the table of contents can also lead to issues

Document

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context
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