导航中的CSS3转换问题

Question

我想在不使用jQuery的情况下使用纯css3效果，并且希望使用css3转换使标签顺利展开，但是存在问题。

如果你看看jsfiddle file，你会注意到标签重叠和崩溃的问题。

这是我的HTML代码：

<div id="wrapper"> 
    <nav id="mainnav"> 
     <ol> 
      <li class="home"><a href="http://www.domain.com"></a></li> 
      <li class="news"><a href="http://www.domain.com/p/">News</a></li> 
      <li class="photos"><a href="http://www.domain.com/channels/s/">Photos</a> </li> 
      <li class="biography"><a href="http://www.domain.com/e/">Biography</a></li> 
     </ol> 
    </nav> 
</div> 

和CSS代码：

div#wrapper{ 
width:990px; 
height:auto; 
margin:0 auto; 

font:15px Arial,Verdana,Helvetica,sans-serif; 

} 
div#wrapper #mainnav{ 
width:100%; 
height:40px; 

border-bottom:1px solid #c4c4c4; 
float:left; 
clear:both; 
background-color: #5b5b5b; 
background-image: -moz-linear-gradient(#5b5b5b,#4d4d4d,#3f3f3f); 
background-image: -webkit-linear-gradient(#5b5b5b,#4d4d4d,#3f3f3f); 
background-image: -o-linear-gradient(#5b5b5b,#4d4d4d,#3f3f3f); 
background-image: -ms-linear-gradient(#5b5b5b,#4d4d4d,#3f3f3f); 
background-image: linear-gradient(#5b5b5b,#4d4d4d,#3f3f3f); 
} 

div#wrapper #mainnav ol{ 
list-style:none; 
margin:0px; padding:0; 
} 
div#wrapper #mainnav li{ 
float:left; 
} 

div#wrapper #mainnav li.home{ 
background: #6db3f2; /* Old browsers */ 
background: -moz-linear-gradient(top, #6db3f2 0%, #54a3ee 40%, #3690f0 56%, #1e69de 100%); /* FF3.6+ */ 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#6db3f2), color-stop(40%,#54a3ee), color-stop(56%,#3690f0), color-stop(100%,#1e69de)); /* Chrome,Safari4+ */ 
background: -webkit-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* Chrome10+,Safari5.1+ */ 
background: -o-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* Opera 11.10+ */ 
background: -ms-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* IE10+ */ 
background: linear-gradient(to bottom, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* W3C */ 
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6db3f2', endColorstr='#1e69de',GradientType=0); /* IE6-9 */ 

float:left; 
width:48px; 
height:40px; 
position:relative; 
margin-top:0px ; padding:0; 
} 
div#wrapper #mainnav li.home a{ 
background:url(home.png) 0px 0px no-repeat; 
margin-left:0px; 
} 


div#wrapper #mainnav li.home:hover{ 
background: #6db3f2; /* Old browsers */ 
background: -moz-linear-gradient(top, #6db3f2 0%, #54a3ee 40%, #3690f0 56%, #1e69de 100%); /* FF3.6+ */ 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#6db3f2), color-stop(40%,#54a3ee), color-stop(56%,#3690f0), color-stop(100%,#1e69de)); /* Chrome,Safari4+ */ 
background: -webkit-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* Chrome10+,Safari5.1+ */ 
background: -o-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* Opera 11.10+ */ 
background: -ms-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* IE10+ */ 
background: linear-gradient(to bottom, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* W3C */ 
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6db3f2', endColorstr='#1e69de',GradientType=0); /* IE6-9 */ 
float:left; 
width:48px; 
height:40px; 
position:relative; 
margin-top:0px ; padding:0; 
} 
div#wrapper #mainnav li.home a:hover{ 
background:url(home.png) 0px 0px no-repeat; 
margin-left:0px; 

} 

div#wrapper #mainnav li.news:hover{ 
cursor:pointer; 
border:1px solid #b30808; background-color: #e40a0a; 
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#e40a0a), color-stop(100%, #9f0202)); 
background-image: -webkit-linear-gradient(top, #e40a0a, #9f0202); 
background-image: -moz-linear-gradient(top, #e40a0a, #9f0202); 
background-image: -ms-linear-gradient(top, #e40a0a, #9f0202); 
background-image: -o-linear-gradient(top, #e40a0a, #9f0202); 
background-image: linear-gradient(top, #e40a0a, #9f0202);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr=#e40a0a, endColorstr=#9f0202); 
} 
div#wrapper #mainnav li.news a:hover{ 
background:url(awatch_icon.png) 5px 6px no-repeat; 
padding-top:9px; 
text-shadow:1px 1px 1px blue;border-left:1px solid #000; 
} 

div#wrapper #mainnav li.photos:hover{ 
background: #6db3f2; /* Old browsers */ 
background: -moz-linear-gradient(top, #6db3f2 0%, #54a3ee 40%, #3690f0 56%, #1e69de 100%); /* FF3.6+ */ 
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#6db3f2), color- stop(40%,#54a3ee), color-stop(56%,#3690f0), color-stop(100%,#1e69de)); /* Chrome,Safari4+ */ 
background: -webkit-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* Chrome10+,Safari5.1+ */ 
background: -o-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* Opera 11.10+ */ 
background: -ms-linear-gradient(top, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* IE10+ */ 
background: linear-gradient(to bottom, #6db3f2 0%,#54a3ee 40%,#3690f0 56%,#1e69de 100%); /* W3C */ 
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#6db3f2', endColorstr='#1e69de',GradientType=0); /* IE6-9 */ 
} 
div#wrapper #mainnav li.photos a:hover{ 
background:url(domain_icon.png) 5px 6px no-repeat;padding-top:10px;text-shadow:1px 1px 1px blue;} 




div#wrapper #mainnav li.biography:hover{ 
background-color: #ffaf46; 
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffaf46), color-stop(100%, #e78404)); 
background-image: -webkit-linear-gradient(top, #ffaf46, #e78404); 
background-image: -moz-linear-gradient(top, #ffaf46, #e78404); 
background-image: -ms-linear-gradient(top, #ffaf46, #e78404); 
background-image: -o-linear-gradient(top, #ffaf46, #e78404); 
background-image: linear-gradient(top, #ffaf46, #e78404);filter:progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr=#ffaf46, endColorstr=#e78404); 
} 
div#wrapper #mainnav li.biography a:hover{ 
background:url(icon.png) 5px 6px no-repeat;padding-top:10px;text-shadow:1px 1px 1px blue;} 



div#wrapper #mainnav li{background:url(mainnav_sep.jpg) no-repeat left top;float:left;} 
div#wrapper #mainnav li a{display:block;padding-top:11px;color:#fff;margin:0 10px;cursor:pointer;height:27px;text-shadow:1px 1px 1px #000;} 
div#wrapper #mainnav li a:link, div#wrapper #mainnav li a:visited{text-decoration:none;} 
div#wrapper #mainnav li a:hover,div#wrapper #mainnav li a:active, div#wrapper #mainnav li a:focus { 
transition:width 2s; 
-moz-transition:width 2s; /* Firefox 4 */ 
-webkit-transition:width 2s; /* Safari and Chrome */ 
-o-transition:width 2s; /* Opera */ 
width:120px;height:29px;margin:0px 0px 0px 0px ;text-indent:35px;text- decoration:none;color:#fff;text-shadow:1px 1px 1px #000;} 

Answer 1

这是因为你给的过渡效果<a>元素，尝试给它<li>元素和改变宽度...

只需尝试类似this

HTML

<ul> 
    <li>blah</li> 
    <li>blah2</li> 
</ul>​ 

CSS

ul li:nth-child(1){ 
    background-color: #ff0000; 
} 

ul li:nth-child(2){ 
    background-color: #00ff00; 
} 

li { 
    display: inline-block; 
    height: 20px; 
    width: 100px; 
    text-align: center; 
    transition:width 2s; 
    -moz-transition:width 2s; /* Firefox 4 */ 
    -webkit-transition:width 2s; /* Safari and Chrome */ 
    -o-transition:width 2s; /* Opera */ 
} 

li:hover { 
    width: 300px; 
}​