引导4.0网格系统布局不起作用
问题描述：
我想用bootstrap做一个布局，但我无法弄清楚我做错了什么。我把两列6和第二列6我把2列3里面，但它不工作。我是bootstrap的新手。引导4.0网格系统布局不起作用
下面是代码：
<!DOCTYPE html>
<html>
<head>
\t <title></title>
\t <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css" integrity="sha384-rwoIResjU2yc3z8GV/NPeZWAv56rSmLldC3R/AZzGRnGxQQKnKkoFVhFQhNUwEyJ" crossorigin="anonymous">
\t <script src="https://code.jquery.com/jquery-3.1.1.slim.min.js" integrity="sha384-A7FZj7v+d/sdmMqp/nOQwliLvUsJfDHW+k9Omg/a/EheAdgtzNs3hpfag6Ed950n" crossorigin="anonymous"></script>
\t <script src="https://cdnjs.cloudflare.com/ajax/libs/tether/1.4.0/js/tether.min.js" integrity="sha384-DztdAPBWPRXSA/3eYEEUWrWCy7G5KFbe8fFjk5JAIxUYHKkDx6Qin1DkWx51bBrb" crossorigin="anonymous"></script>
\t <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/js/bootstrap.min.js" integrity="sha384-vBWWzlZJ8ea9aCX4pEW3rVHjgjt7zpkNpZk+02D9phzyeVkE+jo0ieGizqPLForn" crossorigin="anonymous"></script>
\t <style type="text/css">
\t </style>
</head>
<body>
<div class="container-fluid">
\t <div class="container">
\t \t <div class="row">
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-left: solid 1px #ffbfbf;">a</div>
\t \t \t <div class="col-1 col-sm-1 col-md-1 col-xl-1" style="border-right: solid 1px #ffbfbf;border-left: solid 1px #ffbfbf;">a</div>
\t \t </div>
\t </div>
\t <div class="container">
\t \t <div class="row">
\t \t \t <div class="col-12 col-sm-12 col-md-6 col-xl-6" style="border-left: solid 1px #ffbfbf;"><div style="height: 700px; background-color: #FF3355; border-radius: 15px;">a a a a a a</div></div>
\t \t \t <div class="col-12 col-sm-12 col-md-6 col-xl-6" style="border-left: solid 1px #ffbfbf;">
\t \t \t \t <div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;"><div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div></div>
\t \t \t \t <div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;"><div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div></div>
\t \t \t \t <div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;"><div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div></div>
\t \t \t \t <div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;"><div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div></div>
\t \t \t </div>
\t \t </div>
\t </div>
</div>
335
</body>
</html>我想要做什么：
我能得到什么：
答
你只是缺少一个基本的Bootstrap“规则”。从docs ..
在网格布局，内容必须放在列内只有 列可以行的直接孩子。
在自举4，.col-是不置于.row小号**他们会简单地垂直堆叠**。
https://www.codeply.com/go/GlA3IP7oGU
<div class="row">
<div class="col-12 col-sm-12 col-md-6 col-xl-6" style="border-left: solid 1px #ffbfbf;">
<div style="height: 700px; background-color: #FF3355; border-radius: 15px;">a a a a a a</div>
</div>
<div class="col-12 col-sm-12 col-md-6 col-xl-6" style="border-left: solid 1px #ffbfbf;">
<div class="row">
<div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;">
<div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div>
</div>
<div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;">
<div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div>
</div>
<div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;">
<div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div>
</div>
<div class="col-12 col-sm-12 col-md-6 col-xl-6" style="padding-right: 0px; padding-left:0px;border-left: solid 1px #ffbfbf;">
<div style="height: 320px; background-color: #FF3355; border-radius: 15px;">a</div>
</div>
</div>
</div>
</div>