fix: margin problem in css value mode

[nova1751]

中文版模板 / Chinese template

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
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🔗 Related issue link

#48505

💡 Background and solution

Related to PR #48522. The previous change didn't adpat to the css value mode in runtime. So such change is more reasonable😂
Previous

After change

📝 Changelog

Language	Changelog
🇺🇸 English	fix the animation effect of upload component in css-value mode
🇨🇳 Chinese	修复 upload 组件在 css 值模式动画效果的问题

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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[github-actions]

[github-actions]

👁 Visual Regression Report for PR #48569 Passed ✅

🎯 Target branch: master (c321492)
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🎊 Congrats! No visual-regression diff found.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (c321492) to head (b98bc76).

Additional details and impacted files

@@            Coverage Diff             @@
##            master    #48569    +/-   ##
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  Coverage   100.00%   100.00%            
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  Files          745       745            
  Lines        13593     12937   -656     
  Branches      3627      3382   -245     
==========================================
- Hits         13593     12937   -656     

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