李丰：张伟对这个问题有什么见解? 张伟 ：我个人理解内容行业的护城河 ，是社会分工导致的内容行业对别的行业的渗透 ，其实提高了行业的存活率 。
| Name | Class | Description |
|---|---|---|
| Default | None | No styles, just columns and rows |
| Basic | .table | Only horizontal lines between rows |
| Bordered | bordered | Rounds corners and adds outer border |
| Zebra-stripe | striped | Adds light gray background color to odd rows (1, 3, 5, etc) |
| Condensed | condensed | Cuts vertical padding in half, from 8px to 4px, within all td and th elements |
<form class="well">
<label>Label name</label>
<input type="text" class="span3" placeholder="Type something">
<span class="help-block">Example block-level help text here.</span>
<label class="checkbox">
<input type="checkbox"> Check me out
</label>
<button type="submit" class="btn">Submit</button>
</form>