box-sizing: content-box

box-sizing: content-box是CSS中的一个属性，用于定义盒子的宽度和高度的计算方式。当设置为content-box时，盒子的宽度和高度不包括元素的内边距和边框。也就是说，设置的width和height只包括元素的内容部分，不包括元素的内边距和边框。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [边框盒子 box-sizing 的 content-box 和 border-box属性](https://blog.csdn.net/qq_45288176/article/details/125293359)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *3* [CSS3 box-sizing属性详解](https://download.csdn.net/download/weixin_38674992/13671293)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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