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.
Yelp给人感觉背后一个真实的人类在管理。 为了吸引用户，大多数短视频在短时间里提供高强度、高价值的内容，成了很多人的首选。
<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.
在那个时期，移动互联网产品发展迅速，全民创业也还火热。截至2014年12月25日，永安自行车投后估值9亿元。
殊不知微信只是载体，今天我们的用户来源更加多元化，例如老客户介绍，从2015年的8%增长到2016年的20%;广告投放引流从2015年的12%增长到27%。 上海交通大学轨道交通高管班项目主任汪峰也指出： 随意扫陌生人二维码存在安全隐患，从技术角度而言，一些别有用心者会伺机获取他人隐私信息，甚至将黑客软件植入他人手机。
| 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 |
从而我们的业务也实现了快速增长。
<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.
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。如果按照此前22.62元的估值计算，所对应的动态市盈率(TTM)高达67.2倍。
4.2核心用户群定位与需求分析 《王者荣耀》毕竟是一款MOBA类游戏，并且从发布开始就是打着还原端游MOBA精髓的旗号而宣传的，所以在《王者荣耀》一开始就进入并留下来的玩家基本上也就是《王者荣耀》的核心玩家了，那就是从《英雄联盟》等MOBA类端游转过来的端游核心玩家们。他的公司实在是有点多，从影视、游戏、经纪，到电商、可穿戴设备，吴奇隆都有自己的公司。
所以，大S固然能增加知名度，但食客不傻，就好像我喜欢听老罗讲相声，但让我选100次，我还是选苹果不选锤子。 先说观点： 成功实现B轮融资的概率，在签署oldschool投资条款书后，拿下B轮融资的概率是10%; 在签署#powerlaw投资条款书后，拿下B轮融资的概率是10%; 在签署#downtoearth投资条款书后，拿下B轮融资的概率是70%; VCOldschool(低估值)：在经历了种子轮融资以及额外的A轮融资股权稀释之后，我们的创始人大概能持股公司40%左右的股权，之所以这么说，完全是因为估值太低了。
| 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 |