blocks|key|2991881|text|尝试将此CSS应用于导航栏：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2991882|border-top:+1px+solid+#eee
border-bottom:+1px+solid+#eee|code-block|syntax|javascript|2991883|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try applying this CSS to the nav bar:

<pre><code>border-top: 1px solid #eee
border-bottom: 1px solid #eee
</code></pre>

blocks|key|867529|text|使用边框和填充：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|867530|*+{
++++margin:+0;
++++padding:+0;
}

nav+{
++++text-align:+center;
++++background:+black;
++++color:+white;
++++padding:+.2em;
}

ul+{
++++padding:+.5em;
++++border:+1px+solid+white;
++++border-left:+none;
++++border-right:+none;
}



nav+li+{
++++display:+inline;
++++list-style-type:+none;
++++padding:+0+2em;
}|code-block|syntax|javascript|867531|Demo|offset|length|867532|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/bfqLj/^0|0|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Use borders and padding:

<pre><code>* {
 margin: 0;
 padding: 0;
}

nav {
 text-align: center;
 background: black;
 color: white;
 padding: .2em;
}

ul {
 padding: .5em;
 border: 1px solid white;
 border-left: none;
 border-right: none;
}



nav li {
 display: inline;
 list-style-type: none;
 padding: 0 2em;
}
</code></pre>

<a href="http://jsfiddle.net/bfqLj/" rel="nofollow">Demo</a>

blocks|key|2991904|text|我会对ul标记应用一个大纲，所以css应该是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2991905|nav+ul{
++outline-color:+white;
++outline-style:+solid;
++outline-width:+2px;
++outline-offset:+-7px;
++height:+60px;
++width:+848px;
}|code-block|syntax|javascript|2991906|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I would apply an outline to the ul tag, so the css should be:

<pre><code>nav ul{
 outline-color: white;
 outline-style: solid;
 outline-width: 2px;
 outline-offset: -7px;
 height: 60px;
 width: 848px;
}
</code></pre>

blocks|key|867572|text|最简单的方法是向nav元素添加填充，4px可以很好地处理li元素的宽度。同时添加浮点:左|type|unstyled|depth|inlineStyleRanges|entityRanges|data|867573|现在将border-top和border-bottom添加到ul元素中。在这里也添加浮动:+left。这将切换您的li元素，因为它们具有固定的宽度。把它们的宽度降低到210px，这样就没问题了。|867574|添加到代码中的CSS：|867575|nav+{
++padding:+4px
++float:+left;
}

nav+ul+{
++border-top:+1px+solid+white;
++border-bottom:+1px+solid+white;
++float:+left;
}

nav+li+{
++width:+210px;
}|code-block|syntax|javascript|867576|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

The easiest is to add a padding to the nav element, 4px makes good with width of li elements. Also add float: left

Now add border-top and border-bottom to the ul element. Add float: left here as well. This will switch your li element around as they have a fixed width. lower the width of them to 210px and things should be fine.

CSS additions to your code:

<pre><code>nav {
 padding: 4px
 float: left;
}

nav ul {
 border-top: 1px solid white;
 border-bottom: 1px solid white;
 float: left;
}

nav li {
 width: 210px;
}
</code></pre>

blocks|key|867589|text|如果你根本不想改变你的html，你可以添加到你的css中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|867590|nav+ul:before+{
++++border-bottom:+1px+solid+white;
++++border-top:+1px+solid+white;
++++bottom:+5px;
++++content:+"";
++++left:+5px;
++++position:+absolute;
++++right:+5px;
++++top:+5px;
++++z-index:0;
}
nav+ul+{
++++overflow:+auto;
++++position:+relative;
++++background-color:#000;
}
nav+ul+li{
++++position:relative;
++++z-index:10;
}|code-block|syntax|javascript|867591|并从li元素中删除背景色(因为我将它添加到了ul中)|offset|length|style|CODE|867592|entityMap^0|0|0|2|2|M|2|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

If you do not want to change your html at all, you can add this to your css

<pre><code>nav ul:before {
 border-bottom: 1px solid white;
 border-top: 1px solid white;
 bottom: 5px;
 content: "";
 left: 5px;
 position: absolute;
 right: 5px;
 top: 5px;
 z-index:0;
}
nav ul {
 overflow: auto;
 position: relative;
 background-color:#000;
}
nav ul li{
 position:relative;
 z-index:10;
}
</code></pre>

and remove the background-color from the <code>li</code> elements (since i added it to the <code>ul</code>)

blocks|key|116957|text|如果line-height与font-size相同，您可以通过更改列表元素的padding-bottom来操纵边界距离，下面是我的示例：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|116958|.headerSection+ul.navigation+li++a+{
++++font-size:+12px;
++++line-height:+12px;
++++text-decoration:+none+;
++++padding-bottom:+10px;+
++++border-bottom-color:+transparent;
++++border-bottom-width:+5px;
++++border-bottom-style:+solid;
}+

.headerSection+ul.navigation+li+a:hover+{
++++border-bottom-color:+#e8bf5d;
}|code-block|syntax|javascript|116959|entityMap^0|2|B|E|9|12|E|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

If <code>line-height</code> is the same as <code>font-size</code> you can manipulate border distance by changing <code>padding-bottom</code> of list element, here is my example: 

<pre><code>.headerSection ul.navigation li a {
 font-size: 12px;
 line-height: 12px;
 text-decoration: none ;
 padding-bottom: 10px; 
 border-bottom-color: transparent;
 border-bottom-width: 5px;
 border-bottom-style: solid;
} 

.headerSection ul.navigation li a:hover {
 border-bottom-color: #e8bf5d;
}
</code></pre>

How do I add a rule above and below my nav bar? I tried an HR tag, but that seemed to make a lot of space around the nav bar. Here is my html and here is the example of how I want to do it.

<a href="http://matthewtbrown.com/jeffandcricketquilt/" rel="nofollow">http://matthewtbrown.com/jeffandcricketquilt/</a>

<a href="http://matthewtbrown.com/jeffandcricketquilt/rule.png" rel="nofollow">http://matthewtbrown.com/jeffandcricketquilt/rule.png</a>

CSS hr tag in a nav bar with a margin

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何在导航栏的上方和下方添加规则？这是我的html，这是我想要做的例子。

问带边距的导航栏中的CSS hr标签
EN

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问带边距的导航栏中的CSS hr标签EN