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.
一个曾占有全球25%市场份额的手机业务，都能在5年之内玩完，又何况是一个出货量仅有45万排名第四的VR业务呢?所以，HTC放弃手机转攻VR业务，也是一步相当危险的棋，但也有50%的可能置之死地而后生。 在美剧《硅谷》中，从超市售货员到医院医生人人都在讲创业拉融资;一个潜力项目初露锋芒，资本就蜂拥而至，高估值和巨额融资让创业者飘飘然;而在创意被剽窃，公司处于低潮期，各大投资机构又纷纷压低价钱或者直接弃离。
<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.
后来他常常想，当初第一次创业失败后，如果团队不解散，而是坚持下来换个方向继续做，会不会成功? 接下来的几段创业经历越发让他觉得，志同道合的合伙人是多么可遇不可求。世界最大的联盟——欧盟，内部矛盾重重，但是罗江春认为，百度做得很好，“为什么我们能跟百度合作十年，因为百度不是在一味索取，也不是做完一个月生意下个月就没有了，大家一起成长，是互相依存的关系。
然后……嗯，没有然后了。 2014年这家公司7000人左右，现在早就超过了10000。
| 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 |
结果大众化没实现，“高端”的牌子却被砸了。
<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.
而在聊业务时，他们会主动说出和美国或者国内公司的差距，这些差距通过什么方式弥补，并不是一味地说‘我们就是比别人好’。作为商人，他曾做过冯伦、潘石屹的领导，被周鸿祎尊为老师，更成就了分众、汉庭等无数个商业传奇，他就是王功权。
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。 张旭豪：有一个忠告，创业不完全都是打仗。
不错，百度这次又是来刷存在感的，这是第一层套路。 第三口锅：融资了就可以财务自由 想通过融资来获得财务自由的，要么是骗子，要么是傻子。
| 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 |