fix(Menu): Fixed a major issue with the floating style and triggering…

[kampiu]

… area of vertical menus being different under secondary menus.

[中文版模板 / Chinese template]

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🔗 Related issue link

#47143

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	By adjusting the background color of the child level when the non horizontal mode submenu is activated, the expected effect is forcibly constrained.
🇨🇳 Chinese	通过调整非横向模式下子菜单被激活时的子级背景色强制约束预期效果。

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[github-actions]

Visual Regression Report for PR #47221 Passed ✅

Target branch: master (c61870e)

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Congrats! No visual-regression diff found

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Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c61870e) 100.00% compared to head (83b984b) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #47221   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          732       732           
  Lines        12563     12563           
  Branches      3295      3295           
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  Hits         12563     12563           

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[MadCcc]

Better solution here: #47227

[kampiu]

Better solution here: #47227

Is this done by making the pop-up position of the submenu closer to the floating area

[MadCcc]

Is this done by making the pop-up position of the submenu closer to the floating area

Submenu did have a pseudo element to make it close to trigger, but the position was wrong before.