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.
你的这个短板在哪里?你的优点在哪里?其实，投资人比创业者更难，要求更高。但是对于过程如何去跟同事沟通，今天对于每个创业者来说时间都很珍贵，今天真的值得反思的是说，花在外面沟通的时间，跟我们真正同事沟通的时间、跟战友沟通的时间比例是多少? 很多创业者是自嗨的创业者，外面侃侃而谈很开心，说了自己不相信的话;反而跟自己战友、团队沟通时间很少。
<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.
TOP5：滴滴顺风车联合彩虹合唱团推出《春节自救指南：回家篇》 吴声(场景实验室创始人)：滴滴顺风车联合上海彩虹室内合唱团打造跨界作品《春节自救指南——回家篇》，是对“场景流”这一新物种关键词的最好示例。也就是说，对那些在信息技术服务方面有很高要求的领域，我们想办法去提供产品而不是服务。
汪东风对雷帝网表示，福建有个很好的氛围。 易名中国已挂牌新三板，易名中国CEO孔德菁在域名行业从事了很多年。
| 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 |
document.writeln('关注创业、电商、站长，扫描A5创业网微信二维码，定期抽大奖。
<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.
大学毕业后在某BAT大厂仅工作半年就离开的李进，加入了大学同学创办的一家创业公司。 在商品上，24季私享家想寻找坚持传统工艺的制造者。
十年“老友” 风行网和百度联盟的合作始于2007年。 这种说辞，“我们要做的是什么什么领域的小米”，新晋的创业小鲜肉在资本市场上屡试不爽，形成了创业圈的一股“泥石流”。
对于频繁而又经常发生的操作，这种状态反馈应该微妙，而对于重要而又不经常发生的交互，这种反馈则应该做的更加明显。 但即使资金到位，一家创业公司想生存下来还要接受多方面的挑战。
| 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 |