The default grid system provided in Bootstrap utilizes 12 columns that render out at widths of 724px, 940px (default without responsive CSS included), and 1170px. Below 767px viewports, the columns become fluid and stack vertically.
<div class="row">
<div class="span4">...</div>
<div class="span8">...</div>
</div>
As shown here, a basic layout can be created with two "columns", each spanning a number of the 12 foundational columns we defined as part of our grid system.
<div class="row">
<div class="span4">...</div>
<div class="span4 offset4">...</div>
</div>
With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new .row and set of .span* columns within an existing .span* column.
.span3 columns should be placed within a .span6.
<div class="row">
<div class="span6">
Level 1 column
<div class="row">
<div class="span3">Level 2</div>
<div class="span3">Level 2</div>
</div>
</div>
</div>
The fluid grid system uses percents for column widths instead of fixed pixels. It also has the same responsive variations as our fixed grid system, ensuring proper proportions for key screen resolutions and devices.
玩王者荣耀相当于一种社交活动，玩得好的人会被打上“这人玩王者荣耀很溜”的标签，通过微信、QQ等连接线上跟线下的社交平台的传播，从而能够将这个标签带入到现实生活中。 重新出发的过程中，创业的这段经历给他们带来了什么?他们的内心深处又在寻找些什么? 当我们走近这些连续创业后寻找新机会的创业者们，才知道创业在一个人的职业生涯中，意味着什么。
<div class="row-fluid">
<div class="span4">...</div>
<div class="span8">...</div>
</div>
Nesting with fluid grids is a bit different: the number of nested columns doesn't need to match the parent. Instead, your columns are reset at each level because each row takes up 100% of the parent column.
<div class="row-fluid">
<div class="span12">
Level 1 of column
<div class="row-fluid">
<div class="span6">Level 2</div>
<div class="span6">Level 2</div>
</div>
</div>
</div>
The default and simple 940px-wide, centered layout for just about any website or page provided by a single <div class="container">.
<body>
<div class="container">
...
</div>
</body>
<div class="container-fluid"> gives flexible page structure, min- and max-widths, and a left-hand sidebar. It's great for apps and docs.
<div class="container-fluid">
<div class="row-fluid">
<div class="span2">
<!--Sidebar content-->
</div>
<div class="span10">
<!--Body content-->
</div>
</div>
</div>
Media queries allow for custom CSS based on a number of conditions—ratios, widths, display type, etc—but usually focuses around min-width and max-width.
百润股份不但默认了这种“神话式”报道，而且亲自上阵吹号，它依据日本同行的数据预言，到2020年，预调鸡尾酒的销量将超过1.5亿箱，销售额将达到百亿元级别。因为没有收入，公司经常挣扎在死亡线上。
2016年7月27日，中小企业股份转让系统公布了“北京新东方迅程网络科技股份有限公司”(后简称新东方网)的公开转让说明书(申报稿) 其实，背靠着腾讯这样的一棵大树，只要一个游戏的品质本身过关，那么它的早期推广渠道是完全不用担心的，微信、QQ、应用宝，三大产品分发渠道的势力已成，短期之内并不会有其他的公司来阻碍腾讯游戏的发行。
| Label | Layout width | Column width | Gutter width |
|---|---|---|---|
| Smartphones | 480px and below | Fluid columns, no fixed widths | |
| Smartphones to tablets | 767px and below | Fluid columns, no fixed widths | |
| Portrait tablets | 768px and above | 42px | 20px |
| Default | 980px and up | 60px | 20px |
| Large display | 1200px and up | 70px | 30px |
所以它必然要找到新的一些商业的模式，而这种商业模式的建立一定在社群。
<meta name="viewport" content="width=device-width, initial-scale=1.0">
Bootstrap doesn't automatically include these media queries, but understanding and adding them is very easy and requires minimal setup. You have a few options for including the responsive features of Bootstrap:
Why not just include it? Truth be told, not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it.
/* Landscape phones and down */
@media (max-width: 480px) { ... }
/* Landscape phone to portrait tablet */
@media (max-width: 767px) { ... }
/* Portrait tablet to landscape and desktop */
@media (min-width: 768px) and (max-width: 979px) { ... }
/* Large desktop */
@media (min-width: 1200px) { ... }
For faster mobile-friendly development, use these basic utility classes for showing and hiding content by device.
无奈之下，他们只能跑到贴吧、微博、知乎发帖，并通过QQ和微信把大家聚集起来。 十年“老友” 风行网和百度联盟的合作始于2007年。
可教的观点能够加快领导者培养人的过程。(但我)可以充分的在战壕里厮杀，就像旭豪这样，做快速的调整，调动公司所有的资源，做未来三个月、六个月正确的事情，用执行力超过在外面自嗨。
在那个全国人民饿肚皮的年代，带着6个孩子嗷嗷待哺的孩子，家还能过成什么样? 所以，杨国强一直到15岁，都没有鞋穿，夏天、冬天经常是光着脚上学。 在很多人看来，姚振华遭遇滑铁卢，意味着实体经济大获全胜，虚拟经济则正式成为“过街的老鼠”。
| Class | Phones 480px and below | Tablets 767px and below | Desktops 768px and above |
|---|---|---|---|
.visible-phone |
Visible | Hidden | Hidden |
.visible-tablet |
Hidden | Visible | Hidden |
.visible-desktop |
Hidden | Hidden | Visible |
.hidden-phone |
Hidden | Visible | Visible |
.hidden-tablet |
Visible | Hidden | Visible |
.hidden-desktop |
Visible | Visible | Hidden |