我现在正在编写一个关于uni的网站，除了下拉菜单问题外，它的进展相当顺利。我已经在某些菜单选项中为li属性提供了“已选择”的ID（当用户在相关页面上时），因此它将颜色更改为深粉色。
然而，在“已选择”的li id下面的下拉选项也会变成深粉红色。当我在html中的“about”末尾添加一个封闭的li标签时，下拉列表根本不会出现。
我会发布相关的html和CSS以及截图，希望有人可以帮助我！
以下是所有下拉代码：
/*----- Menu Outline -----*/
.menu-wrap {
width:100%;
box-shadow:0px 1px 3px rgba(0,0,0,0.2);
background:#ffeff8;
}
.menu {
width:1000px;
margin:0px auto;
}
.menu li {
margin:0px;
list-style:none;
font-family:"Luna";
text-transform: lowercase;
border:1px solid #ed85c4;
}
.menu a {
transition:all linear 0.15s;
color:#ed85c4;
background:#ffeff8;
}
.menu li:hover > a, .menu .current-item > a {
text-decoration:none;
color:#d771ae;
}
.menu .arrow {
font-size:10px;
line-height:0%;
}
/*----- Top Level -----*/
.menu > ul > li {
float:left;
display:inline-block;
position:relative;
font-size:14px;
}
.menu > ul > li > a {
padding:3px 40px;
display:inline-block;
text-shadow:0px 0px 0px rgba(0,0,0,0.4);
}
.menu > ul > li:hover > a, .menu > ul > a {
background:#f1dae8;
}
.menu > ul > li#selected a{
color: #ffeff8;
background: #c864a1;
}
/*----- Bottom Level -----*/
.menu li:hover .sub-menu {
z-index:1;
opacity:1;
}
.sub-menu {
width:100%;
padding:0px 0px;
position:absolute;
top:100%;
left:0px;
z-index:-1;
opacity:0;
transition:opacity linear 0.15s;
box-shadow:0px 0px 0px rgba(0,0,0,0.2);
}
.sub-menu li {
display:block;
font-size:12px;
text-transform: lowercase;
font-kerning: auto;
}
.sub-menu li a {
padding:10px 30px;
display:block;
background: #ffeff8;
}
.sub-menu li a:hover, .sub-menu a {
background: #f1dae8;
}<div class="menu-wrap">
<nav class="menu">
<ul class="clearfix">
<li id="selected">
<a href="/about-us.html">about <span class="arrow">▼</span></a>
<ul class="sub-menu">
<li><a href="/history.html">history</a></li>
<li><a href="/values.html">values</a></li>
<li><a href="/truck.html">the truck</a></li>
<li><a href="/produce.html">produce info.</a></li>
</ul>
</li>
答案 0 :(得分：1)
您未正确选择#selected列表项下方的链接。
.menu > ul > li#selected a /*This selects all links below the selected li, including links in child list items*/
应该是
.menu > ul > li#selected > a /* this selects the immediate descendent link only */
答案 1 :(得分：1)
/*----- Menu Outline -----*/
.menu-wrap {
width:100%;
box-shadow:0px 1px 3px rgba(0,0,0,0.2);
background:#ffeff8;
}
.menu {
width:1000px;
margin:0px auto;
}
.menu li {
margin:0px;
list-style:none;
font-family:"Luna";
text-transform: lowercase;
border:1px solid #ed85c4;
}
.menu a {
transition:all linear 0.15s;
color:#ed85c4;
background:#ffeff8;
}
.menu li:hover > a, .menu .current-item > a {
text-decoration:none;
color:#d771ae;
}
.menu .arrow {
font-size:10px;
line-height:0%;
}
/*----- Top Level -----*/
.menu > ul > li {
float:left;
display:inline-block;
position:relative;
font-size:14px;
}
.menu > ul > li > a {
padding:3px 40px;
display:inline-block;
text-shadow:0px 0px 0px rgba(0,0,0,0.4);
}
.menu > ul > li:hover > a, .menu > ul > a {
background:#f1dae8;
}
.menu > ul > li#selected >a{
color: #ffeff8;
background: #c864a1;
}
/*----- Bottom Level -----*/
.menu li:hover .sub-menu {
z-index:1;
opacity:1;
}
.sub-menu {
width:100%;
padding:0px 0px;
position:absolute;
top:100%;
left:0px;
z-index:-1;
opacity:0;
transition:opacity linear 0.15s;
box-shadow:0px 0px 0px rgba(0,0,0,0.2);
}
.sub-menu li {
display:block;
font-size:12px;
text-transform: lowercase;
font-kerning: auto;
}
.sub-menu li a {
padding:10px 30px;
display:block;
background: #ffeff8;
}
.sub-menu li a:hover, .sub-menu a {
background: #f1dae8;
}<div class="menu-wrap">
<nav class="menu">
<ul class="clearfix">
<li id="selected">
<a href="/about-us.html">about <span class="arrow">▼</span></a>
<ul class="sub-menu">
<li><a href="/history.html">history</a></li>
<li><a href="/values.html">values</a></li>
<li><a href="/truck.html">the truck</a></li>
<li><a href="/produce.html">produce info.</a></li>
</ul>
</li>