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我想通过引导使用网格结构来创建一个漂亮的页面。但是，我的div被移动，并且行中的列不再对齐： 
HTML和CSS引导：网格结构不对齐
与三者的框应与蓝色背景一致。我究竟做错了什么？这是什么原因？我想明白。我的代码是：
EDIT1
我加no-marg到<h1>但现在看起来是这样的：我怎样才能填写完整的高度？ 
.no-marg{
\t margin:0 !important;
\t padding:0 !important;
}
.sm-pad{
\t padding:5px;
\t background-clip:content-box;
}
.col-white{
\t color:white;
}
.dark-theme {
color: white;
background-color:#17191B;
height: 100%;
}
#step-no{
\t margin:20px;
}
.light-theme {
color: black;
background-color:#EFEFEF;
}
.cont-box {
\t margin:6px;
}
body {
background: black;
}
@media (min-width: 768px) {
.row.equal {
display: flex;
flex-wrap: wrap;
}
}
.red-square{
\t background-color: red;
\t border-radius: 0;
}
.btn:hover{
\t background-color: #78BE20;
}
.blue-rectangle{
\t background-color: #008ECF;
\t border-radius: 0;
\t height: 100%;
}<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="work_step_v1.css">
</head>
<body>
<div class="row equal">
\t <div class="col-sm-1 red-square">
\t \t <span style="font-size: 40px" class="col-white glyphicon glyphicon-arrow-left"></span>
\t </div>
\t <div class="col-sm-10">
\t \t <h1 class="col-white">Step</h1>
\t </div>
\t <div class="col-sm-1 red-square">
\t \t <span style="font-size: 40px" class="col-white glyphicon glyphicon-cog"></span>
\t </div>
</div>
<div class="row equal">
\t <div class="col-sm-1 red-square">
\t \t <span style="font-size: 40px" class="col-white glyphicon glyphicon-arrow-left"></span>
\t </div>
\t <div class="col-sm-10 blue-rectangle">
\t \t <div class="row equal">
\t \t \t <div class="col-sm-3">
\t \t \t \t <div class="dark-theme">
\t \t \t \t <h1 class="col-white">3</h1> \t \t
\t \t \t \t </div>
\t \t \t </div>
\t \t \t <div class="col-sm-9">
\t \t \t \t <span color<img alt="Warning Logo" src="./image/warning.svg">
\t \t \t </div>
\t \t </div>
\t \t \t <div class="row equal">
\t \t \t <div class="col-sm-6">
\t \t \t </div>
\t \t \t <div class="col-sm-6">
\t \t \t </div>
\t \t </div> \t \t
\t </div>
\t <div class="col-sm-1 red-square">
\t \t <span style="font-size: 40px" class="col-white glyphicon glyphicon-cog"></span>
\t </div>
</div>
<script src="steps_v1.js"></script>
</body>
</html>
我做了，但现在它对齐，但留下空间。请参阅上面的编辑1。 – rashid
设置祖父div.col-sm-3上的填充左边为0 – Soronbe
这个技巧。非常感谢！ – rashid