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.
友友用车的服务突然停掉，没有任何通告，也没有可用的联系途径，这让他们担心：自己的钱会像很多P2P用户一样被创始人卷跑。第一种是当竞争对手获得融资的时候，企业自身也将需要通过融资来建立竞争壁垒，争取更多的成长时间和资源。
<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.
” 在流量越加珍贵的今天，手握大把流量的WiFi万能钥匙等公司迅速成长为各自领域的独角兽。一些很偏远地方的用户，收到货后找到物流公司“合作退货”，而乐淘网收到货后，需要向这些物流公司支付高达百元的物流费用。
关于生活 十年前你说生如夏花般绚烂，十年后你说平凡才是唯一的答案。如果这些问题不能解决，或者继续复制HTC手机的运营模式，HTCVive在未来的发展中，将会同样面临前面所提到的问题。
| 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 |
“僵尸股”中，2015年净利润在2000万元以上的企业，一共有234家，占比6.22%。
<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.
看来，吴晓波对这一点一无所知。 刚在纳斯达克上市的网易，遭遇了互联网泡沫不说，误差金额高达420万美元的“假账事件”也在此时爆发，股价一泻千里。
他会通过微信、视频各种方式开会，有时也会把会议拉到片场开。 直到我遇到了一群“做号者”。
相比2016年第83位、2015年第84位、2013年第93位(2014年的数据不是很准确，坤鹏论查了一下发现也有说是93位的)、2012年第112位，咱们一直在上升，但依然还是没有脱离中游水平。” 目前，和百度联盟对接的风行网工作人员只有两名，而且还身兼数职，“百度联盟的生态体系已经非常成熟了，如果没有百度联盟，需要销售部门亲自去找广告客户，那会相当痛苦且低效”，经历过这个过程的罗江春说。
| 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 |