<div class="col-md-12 no_padding header_row"></div>



    <div class="second_row">
        <div class="col-md-4 box_shadow"></div>
        <div class="col-md-8 no_padding_right">
            <div class="col-md-12 box_shadow"></div>
        </div>
    </div>


    body{
    background:#F0F0F0;
}

.main_holder{
    min-height: 600px;
    margin-top: 40px;
    height: 600px;
}
.box_shadow{
    box-shadow: 0 1px 2px rgba(0,0,0,.1);
    background: white;
    height: auto;
    min-height: 500px;
}

.no_padding{
    padding: 0px !important;
}

.no_padding_right{
    padding-right: 0px !important;
}

.header_row{
    height: 60px;
    background: #00796B;
    -webkit-box-shadow: 0px 0px 9px 1px rgba(143,140,143,1);
    -moz-box-shadow: 0px 0px 9px 1px rgba(143,140,143,1);
    box-shadow: 0px 0px 9px 1px rgba(143,140,143,1); 
}

.second_row{
    position: relative;
    width: 100% !important;
    top: 20px;
}

用css添加一个与背景颜色相同的边框怎么样?我是新手，所以也许有一个很好的理由不这样做，但当我尝试它时，它看起来很好。

引导4

文档说(这里):

行是列的包装器。每个列都有水平填充(称为沟槽)，用于控制它们之间的空间。然后在具有负边距的行上抵消此填充。通过这种方式，列中的所有内容在视觉上都在左侧对齐。

所以正确答案是:设置cols' padding-left/right = - row's margin-left/right。那么简单。

#my-row {
  margin-left: -80px;
  margin-right: -80px;
}

#my-col {
  padding-left: 80px;
  padding-right: 80px;
}

演示:https://codepen.io/frouo/pen/OqGaWN

为了获得列之间特定宽度的间距，我们必须在标准Bootstrap的布局中设置填充。

@import url('https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css'); /* Check breakpoint at http://getbootstrap.com/css/#grid-media-queries */ @media (min-width: 992px) { .space-100-px > .row > .col-md-6:first-child { padding: 0 50px 0 0; /* The first half of 100px */ } .space-100-px > .row > .col-md-6:last-child { padding: 0 0 0 50px; /* The second half of 100px */ } } /* The result will be easier to see. */ .space-100-px img { width: 100%; height: auto; } <div class="container-fluid space-100-px"> <div class="row"> <div class="col-md-6"> <img src="http://placehold.it/450x100?text=Left" alt="Left"> </div> <div class="col-md-6"> <img src="http://placehold.it/450x100?text=Right" alt="Right"> </div> </div> </div>

引导4，文件自定义。SCSS您可以添加以下代码:

$grid-gutter-width-base: 20px;

$grid-gutter-widths: ( xs: $grid-gutter-width-base, 
sm: $grid-gutter-width-base, 
md: $grid-gutter-width-base, 
lg: $grid-gutter-width-base, 
xl: $grid-gutter-width-base
);

默认$grid-gutter-width-base: 30px;

这也是一种方法。请查看以下网址https://jsfiddle.net/sarfarazk/ofgqm0sh/

<div class="container">
 <div class="row">
  <div class="col-md-6">
    <div class="bg-success">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
    </div>
  </div>
  <div class="col-md-6">
    <div class="bg-warning">Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium.
    </div>
  </div>
</div>
</div>