我有一个奇怪的问题。我有一个简单的网页，由于某种原因
margin-top 和 margin-bottom超过18px。我的 *.css 文件中没有任何内容指定这一点。 Firefox Firebug 向我显示了所应用的样式，但任何地方都没有边距。
在图中，标题文本所在（或应该位于）的 div 有限制。但由于页边距的原因，标题文本被推下。
这可能是什么原因造成的？ firefox/firebug 中是否有任何地方可以准确地向我展示该样式的来源？它说 header 标签继承自 body 样式，但这只是这样：
body
{
font-size: .85em;
font-family: "Trebuchet MS", Verdana, Helvetica, Sans-Serif;
color: #232323;
background-color: #fff;
}
有什么想法吗？提前致谢。
I'm having an odd issue. I have a simple web page, and for some reason the <h1 /> tag is having a margin-top and margin-bottom of over 18px. There is nothing in my *.css file that specifies this. Firefox Firebug shows me the style that is applied, but there is no margin anywhere.
In the picture, the div that the header text is in (or supposed to be in) has the limits. But the header text is pushed down because of the margin.
What could be causing this?? Is there anywhere in firefox/firebug that can show me EXACTLY where that style came from? It says that the header tag inherited from the body style, but that is only this:
body
{
font-size: .85em;
font-family: "Trebuchet MS", Verdana, Helvetica, Sans-Serif;
color: #232323;
background-color: #fff;
}
Any ideas? Thanks in advance.
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默认情况下，标题通常有一个边距。看一下使用重置/规范化样式表。
重置或规范化样式表将您的样式重置为所有浏览器的标准基线。重置和标准化之间的区别在于重置清晰的边距、填充等，其中标准化样式表应用合理的默认值。
这些链接应该有用：
Headers often have a margin by default. Have a look at using a reset/normalization stylesheet.
Reset or normalization stylesheets reset your styles to a standard baseline across all browsers. The difference between reset and normalization is that resets clear margins, padding, etc. where normalization stylesheets apply sensible defaults.
These links should be of use:
这是
的默认样式。与的文本大小比段落更大的事实类似。这只是默认值。它也可以被覆盖。That's the default styling for
<h1>s. It's similar the fact that<h1>s have larger text size than paragraphs. It's just the default. It can also be overwritten.大多数浏览器都会添加一些默认的
margin和padding。尝试重置
margin，就像这样您也可以在
h1上重置它Most of the browsers add some default
marginandpadding.Try resetting the
margin, like soYou can also reset it on the
h1所有浏览器都有一个应用于所有页面的默认 CSS。
使用类似 Yahoo 的 重置 CSS 来取消应用的任何样式。
All browsers have a default CSS that is applied to all pages.
Use something like Yahoo's Reset CSS to cancel out any styles applied.