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.
该公司挂牌前的估值就超过33亿元。 在此期间，友友租车曾拿过两轮融资，累计或达2000万美元，投资方包括易车、光速安振、险峰华兴(K2)和天使投资人王刚等。
<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.
营销的确能让更多人知道你的产品，但是能够留住顾客，就只有实实在在的产品质量。如果想要做分时租赁的话，则需要政府单独颁发牌照，显然新能源车更容易拿到牌照。
冰桶挑战、“华妃”蒋欣模仿金星斗空姐片段等事件让微博上的秒拍、小咖秀火爆一时，由于更适合用户碎片化时间，短视频得到快速流行。 可财务自由意味着“被动收入大于主动收入”，即收入的多少不再与工作量直接挂钩。
| 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 |
纵使这样，我还是热爱我这个投资人角色以及这个角色在社会的延伸的价值。
<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.
对于电商运营人员来说，最头疼的莫过于广告位的设置，尤其是每逢节日促销活动，如何合理运用广告位，这是每个运营人员不得不思索的问题。 但是，从申报稿上披露的信息看，在迅速剥离巨额业务后，拉卡拉是否满足创业板“发行人最近两年内主营业务没有发生重大变化”的硬性规定有待考究。
按账面回报算，当时他要多投了陈安妮50万，现在能多赚5000万。 如此一来，游客就没有了足够的时间来闲逛，因为你多待一秒，都有可能被挖掘出潜在的消费心理，就算游客停住了脚步也没关系，这样餐饮和纪念品等消费项目就有了可乘之机。
但这是一个成功率的问题，不是商业模式的问题。“张总、李总都来了，都是给面子，敬酒就都得敬到，这屋敬完了敬那屋。
| 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 |