printf("%d", sizeof(int*));
上面的代码是html + css内联源代码。但我想分开html和css。所以，我编辑了这段代码，见下文。
PS我已修改它，但我认为html，css都不好。如何修复有效的源代码？
这段代码有什么问题？
<div class="col-md-12" style="">
<div class="col-md-4 linkdetail" class="cursor">
<div class="col-md-12" style="margin-bottom:40px">
<img src="/img/product3.png" style="display:inline-block;width:100%;">
</div>
<div class="col-md-12" style="margin-bottom:15px">
<img src="/img/100G_ITAEWON 565 Copy.png" style="display:inline-block;">
</div>
<div class="col-md-12" style="margin-bottom:30px">
<img src="/img/$ 24.5 copy.png" style="display:inline-block;">
</div>
</div>
<div class="col-md-4 linkdetail" class="cursor">
<div class="col-md-12" style="margin-bottom:40px">
<img src="/img/product3.png" style="display:inline-block;width:100%;">
</div>
<div class="col-md-12" style="margin-bottom:15px">
<img src="/img/100G_ITAEWON 565 Copy.png" style="display:inline-block;">
</div>
<div class="col-md-12" style="margin-bottom:30px">
<img src="/img/$ 24.5 copy.png" style="display:inline-block;">
</div>
</div>
<div class="col-md-4 linkdetail" class="cursor">
<div class="col-md-12" style="margin-bottom:40px">
<img src="/img/product3.png" style="display:inline-block;width:100%;">
</div>
<div class="col-md-12" style="margin-bottom:15px">
<img src="/img/100G_ITAEWON 565 Copy.png" style="display:inline-block;">
</div>
<div class="col-md-12" style="margin-bottom:30px">
<img src="/img/$ 24.5 copy.png" style="display:inline-block;">
</div>
</div>
</div>.cursor { cursor:pointer; }
.first-gap { margin-bottom:38px; }
.second-gap { margin-bottom:36px; }
.third-gap { margin-bottom:38px; }
.word-word-gap { margin-bottom:15px; }
.gap { margin-bottom:95px; }
.reactive { display:inline-block;width:100%; }
#section>.first-one { min-height:592px; }