style: 修改按钮组边框宽度不一致的问题

[ssongliu]

Refs #6704

[f2c-ci-robot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[wanghe-fit2cloud]

/lgtm

[wanghe-fit2cloud]

/approve

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