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.
创业就是这个过程，没有什么不可能的，想到马上就要做。毕竟，当“随刷随有”成为市场标配之后，必须要有大量内容填充。
<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.
据Joe所说，硅谷很多顶尖人才都来自移民家庭，他们父母希望他们去有名大公司工作，所以很多时候Joe要去跟这些人的父母沟通、画饼、讲故事。同时，各种各样的《王者荣耀》赛事、直播和社区也被建立了起来，这些活动的本质目的都是为了扩大用户群体，并且让《王者荣耀》渐渐的成为一个平台，由用户自己在上面产生内容和社交，直到融入用户的日常生活当中。
当时比较知名的是绿狗租车和EVcard两家公司，它们的商业模式与友友用车差距很大：汽车租用频率一般一天仅为一次;用户租车流程较为复杂，拍身份证、交押金、办卡等，手续和传统租车公司很类似，耗时长，体验很差。这里是与平面设计不同的地方，其他的画册包装LOGO等VI设计都不需要代码，因为传播的媒介不一样他们是纸质媒介，而网页是通过浏览器为媒介传播
| 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 |
郑志刚13岁就被送出了国，但他凭着努力顺利上了哈佛，但他并没像其他香港富豪子弟一样学经济和管理，而是选了东亚文学及文化，活成了一个另类。
<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.
有了这两块以后，当渠道溢价和流量红利消失的时候，依然能够为用户去创造出新的价值，能够通过这样的用户跟商户连接，才会寻找出新的商业模式。叶晨光个人爱好高空跳伞，自认为可能给产品带来很好的营销作用，结果却事与愿违。
坤鹏论回想起来，还真是这么个道理，这么多年来，最幸福的时候就是年收入没超过10万，还有个真心爱人天天陪伴。有人在用非工业的方式制作茶叶，也有人依然用传统的工艺生产酱油，依靠自然环境的因素，晴天日照，雨天就给酱缸戴上竹编的斗笠。
新三板二级市场的流动性几近枯竭，怎么承受得了405万股的抛盘? 基康仪器的2016年半年报显示，公司前十大股东中，除了京康发展的持股增多，其余全部在减持。经历了这么多事后，我现在想找个靠谱点的大平台磨炼技术，同时塑造个人在技术圈的知名度，暂时不会再考虑去创业公司了。
| 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 |