html代码：
<!--优质头部广告位开始-->
<div class="ad-container">
<div class="br" data-time="2024/10/14">
<a href="/ad.html" rel="nofollow" class="rt" target="_blank"><img class="br" src="https://www.freeimg.cn/i/2024/01/02/659417c8953e0.png" width="100%"><span class="ad"></span></a>
</div>
<div class="br">
<a href="/ad.html" rel="nofollow" class="rt" target="_blank"><img class="br" src="https://www.freeimg.cn/i/2024/01/02/659417c8953e0.png" width="100%"><span class="ad"></span></a>
</div>
</div>
<div class="ad-container">
<div class="br">
<a href="/ad.html" rel="nofollow" class="rt" target="_blank"><img class="br" src="https://www.freeimg.cn/i/2024/01/02/659417c8953e0.png" width="100%"><span class="ad"></span></a>
</div>
<div class="br">
<a href="/ad.html" rel="nofollow" class="rt" target="_blank"><img class="br" src="https://www.freeimg.cn/i/2024/01/02/659417c8953e0.png" width="100%"><span class="ad"></span></a>
</div>
</div>
<!--优质头部广告位结束-->
css代码：
.ad-container{display:flex;}
.ad-container .br{flex:1; margin: 0 5px;