为什么bootstrap网格不正确地堆叠这些元素？

Question

我的网格中的第三个元素没有向左侧突破，而是向右突破。我相信这是因为列的高度不同。我不能简单地附加2行，因为代码的构建方式，它应该显示为1x4,2x2，然后是4x1。我不想通过javascript或css根据屏幕大小来显示和隐藏行，因为我宁愿让网格系统以它应该的方式工作。附件是我的代码示例供参考。

        <div class="container-fluid" style="background-color: ">
        <div class="col-md-3 col-sm-6" style="background-color: red;">
            <div class="feature-box">
                <div class="feature-item"></div>
                <p class="sub-title">Better Customer Relationships</p>
                <p class="text">Personalized emails connect you with your customers.</p>
            </div>
        </div>
        <div class="col-md-3 col-sm-6" style="background-color: red;">
            <div class="feature-box">
                <div class="feature-item"></div>
                <p class="sub-title">Set it and Forget It</p>
                <p class="text">Set up a Jaynote campaign once, and automatically engage with every customer.</p>
            </div>
        </div>
        <div class="col-md-3 col-sm-6" style="background-color: red;">
            <div class="feature-box">
                <div class="feature-item"></div>
                <p class="sub-title">Easy to Use</p>
                <p class="text">Simple management panel shows you exactly what to do.</p>
            </div>
        </div>
        <div class="col-md-3 col-sm-6" style="background-color: red;">
            <div class="feature-box">
                <div class="feature-item"></div>
                <p class="sub-title">Guaranteed Results</p>
                <p class="text">90 Day money-back guarantee if you are not completely satisfied with your results.</p>
            </div>
        </div>
    </div>

Answer 1

您是否尝试过每2 .clearfix（完整的12列行）元素应用col-sm-6：

<div class="col-md-3 col-sm-6" style="background-color: red;">
    <div class="feature-box">
        <div class="feature-item"></div>
        <p class="sub-title">Better Customer Relationships</p>
        <p class="text">Personalized emails connect you with your customers.</p>
    </div>
</div>
<div class="col-md-3 col-sm-6" style="background-color: red;">
    <div class="feature-box">
        <div class="feature-item"></div>
        <p class="sub-title">Set it and Forget It</p>
        <p class="text">Set up a Jaynote campaign once, and automatically engage with every customer.</p>
    </div>
</div>
<!-- apply clearfix -->
<div class="clearfix"></div>