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.
在一家永旺超市，也有类似的情况。 “网络连接超时，请检查网络，稍后再试……”最近两天，分时租赁创业公司“友友用车”的用户被这句提示弄得很窝火。
<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.
当2017年年初二更获得B轮1.5亿人民币融资的时候，《数娱工场》做过报道，丁丰称，二更将打造影像培训基地和产业孵化园，建立导演孵化体系，进而形成影视创作人生态。 而在咱们国家，沉重的房价，老有所养，病有所医，失业有保障，都不令人满意，自然让更多的人，特别是已经肩负有家庭重任的人们总是惶恐未来。
在技术和业务数据的支撑下，白山的融资情况也有了好转。在创业初期，我的团队每月工资要12万，公司和仓库每月租金水电要3万，推广费每月要6-10万，产品成本每月要12万(这也包括库存)。
| 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 |
她唱的是她对自己独特的理解、认识。
<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.
IncredibleIndia,印度的未来还将有更多不可思议的故事会发生，我们相信移动互联网的大幕在这个神奇国度才刚刚拉开。 对于周黑鸭来说，由于直营能让公司最大可能地实现把控，因此有利于树立良好的品牌美誉度。
否则，有可能创始人面临投资款要不到股权也收不回来的情况，后患无穷。 但是，假如说转让的主权，在最初的投资协议里有涉及到关于这个回购条款的话，一般你可以和大股东进行沟通，你可以继续继承原来的权利。
据奥图科技CEO叶晨光透漏，投资方奋达科技修改了对赌协议中关于销量要求的时限，奥图科技认为要求过于苛刻，拒绝了这一条款，直接导致了投资方的撤出。没人能成为万事通，但在某种意义上，他们可以成为超级多面手，这就是我眼中的超级预言家。
| 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 |