Bootstrap

Normarlize.css（不同浏览器样式一致性）

container（有留白）与container-fluid(全屏展示)

一个row就表示一行（这一行默认给你均分成了12份，每一份还可以均分成12份）
row(行)
col（列）

<style>
        .red {
            background-color: red;
            border: 3px solid green;
            height: 100px;
        }
</style>
<div class="container">
    <div class="row">
        <div class="col-md-6 red"></div>　　　//控制你占当前行的多少列
        <div class="col-md-6 red"></div>
    </div>
</div>
<!--
        6，6
        2，10
        1～12
        再次理解class里面写的属性值到底是干啥的
-->
<!--借助谷歌浏览器自动切换手机或电脑屏幕，只需要加一个col-xs-6生成对应的布局-->

<style>
                .c1 {
            background-color: red;
        }
        @media screen and (max-width: 600px){
            .c1 {
                background-color: green;
            }
        }
</style>                
<div class="col-md-6 red c1"></div>

<style>
                .c2 {
            background-color: red;
        }
        .c3 {
            height: 60px;
        }
</style>
<div class="container">
    <div class="row">
  <div class="col-xs-6 col-sm-3 c3 c2">.col-xs-6 .col-sm-3</div>
  <div class="col-xs-6 col-sm-3 c2">.col-xs-6 .col-sm-3</div>
  <!-- Add the extra clearfix for only the required viewport -->
  <div class="clearfix visible-xs-block"></div>
  <div class="col-xs-6 col-sm-3 c2">.col-xs-6 .col-sm-3</div>
  <div class="col-xs-6 col-sm-3 c2">.col-xs-6 .col-sm-3</div>
</div>
</div>

<div class="col-md-4 col-md-offset-4">.col-md-4 .col-md-offset-4</div>

col-md-offset-3

<h1>h1. Bootstrap heading <small>Secondary text</small></h1>
<p class="lead">...</p>
<mark>highlight</mark>
<!--两者效果一样，但是语义不一样-->
<del>This line of text is meant to be treated as deleted text.</del>
<s>This line of text is meant to be treated as no longer accurate.</s>

<blockquote>
  <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
  <footer>Someone famous in <cite title="Source Title">Source Title</cite></footer>
</blockquote>


<!--列表组-->
<ul class="list-unstyled">
  <li>...</li>
</ul>

<ul class="list-inline">
  <li>...</li>
</ul>

<table class="table table-bordered table-hover table-striped"></table>
<tr class="active">...</tr>

<button class=‘btn-success/btn-info/btn-primary/btn-danger/btn-warning‘>
  按钮
</button>

btn-block 占父标签100%

<div class="pull-left">...</div>
<div class="pull-right">...</div>

<!--字体图标 意味着操作它跟操作普通文本一样   爱心图标举例-->
<!--图标大小可以通过调span标签所在的父标签调节-->

$(‘#myModal‘).modal(‘show/hide‘)

swal(‘标题‘)
swal(‘标题‘,‘文本‘)
swal(‘标题‘,‘文本‘，‘success‘)
swal(‘标题‘,‘文本‘,‘warning‘)
swal(‘标题‘,‘文本‘,‘info‘)
swal(‘标题‘,‘文本‘,‘error‘)