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.
这张拼接而成的长餐桌，容纳了30人，有外婆家创始人吴国平，阿里巴巴合伙人王帅，作家龚晓跃，金彩画廊创始人金耕，建筑师沈雷，自媒体人王五四等。我们在上门这个领域每天新增用户数超过新美大集团，说明只要把一个领域做得更深、更透、更专注，机会是存在的。
<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.
这个版本会更加有趣、更加带感，更符合网民的口味和需求。 而马先生内部团队，那么多商家向小二行贿，他们便可以参加大型的官方活动，做聚划算、淘抢购等，而我们只能报免费试用、免费试用、免费试用。
所以我才说，当我们设定完了新世相图书馆这个服务的时候，我当时已经确认它在半年时间里面，一定是一个不愁卖的产品，一定是一个口碑特别好的，很多人讨论的东西。老板去听了几堂高大上的全网营销系统课程，回来就组建了网销部，招了好几个员工。
| 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 |
目前3760只“僵尸股”中，有1848家是因为没有流通股才沦落为“僵尸”，还有1912家企业已经有流通股，却没有成交过。
<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.
他在鞋的脚后跟切开一个口后发现，里面根本没有气垫。 焦虑太多了，我想来想去觉得内容公司没有护城河是最大的焦虑。
为了用户体验，从P2P转型B2C 实际上，友友用车之前叫友友租车，最早成立于2014年，主要业务是私家车共享平台。 在大娱乐时代，传统的方式正在被抛弃。
为了维持公司的运转，李进决定转型做外包，为一些初创公司提供产品、设计、策划类服务。 一年多的时间里，他们也算一起经历了起起落落，虽然最后走上了资金吃紧的老路，但杨宁本准备陪着他坚持下去，没想到期权这件事情让他彻底心寒，再加上创业一年确实太累，他最终决定放弃所有期权、股权离开，不再陪CEO冒险。
| 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 |