css - :hover selector being detected even when behind another element

Question

因此，在我正在制作的页面上，我有一个菜单栏和一个在悬停时改变颜色的黑框。当我尝试打开菜单并将鼠标移到黑框上(仍在下拉列表的边界中)时，下拉菜单消失并且调用黑框:悬停选择器。

基本上，当 :hover 位于元素后面时就会被检测到。我尝试搜索，但我得到的唯一结果是如何强制它检测元素后面。我想阻止这种情况发生。

http://jsfiddle.net/yFD2E/13/

重要的 HTML:

<div class="menuBar">
    <ul>
        <li><a href="#">Home</a>
            <ul>
                <li><a href="#">Item 1</a></li>
                <li><a href="#">Item 1</a></li>
                <li><a href="#">Item 1</a></li>
                <li><a href="#">Item 1</a></li>
            </ul>
        </li>
        <li><a href="#">Home 2</a>
            <ul>
                <li><a href="#">Item 1</a></li>
            </ul>
        </li>
    </ul>
</div> <!--End menu bar-->

<div class="center">
    <div class="buttonGroup">
        <div class="buttonMain">
            <p class="hover">Plot</p>
            <p class="show title">Plot</p>
            <a class="show inFront" href="#">Test</a>
        </div>
    </div>
</div>

菜单栏.css:

.menuBar {
    height: 50px;
    width: auto;
    background-color: #E9523F;
    border-radius: 5px;
    box-shadow: 0px 0px 10px #DA281F;
    z-index: 10000;
}

.menuBar ul {
    padding: 0;
    list-style-type: none;
    positoin: relative;
}

.menuBar ul li {
    float: left;
    width: 80px;
    height: 50px;
    display: inline-block;
    text-align: center;
    border-radius: 5px;
}

.menuBar ul ul {
    visibility: hidden;
    position: absolute;
    width: 80px;
    border-radius: 0pxx 5px;
}

.menuBar ul ul li{
    width: 80px;
    height: 50px;
    float: none;
    position: relative;
}

.menuBar ul li a {
    text-decoration: none;
    color: #FAE12D;
    text-align: center;
    width: 80px;
    line-height: 50px;
    margin: 0;
    padding: 0;
    font-size: 17pt;
    height: 50px;
    display: block;
    font-weight: 800;
}

.menuBar ul li:hover ul {
    background-color: #DA281F;
    box-shadow: 0px 0px 10px #DA281F;
}

.menuBar ul li:hover {
    background-color: #DA281F;
    box-shadow: 0px 0px 10px #DA281F;
}

.menuBar ul li:hover ul {
    visibility: visible;
}

.menuBar ul li li:hover {
    background-color: #FE3845;
}

按钮.css

.buttonMain {
    height: 400px;
    width: 400px;
    background-color: #000;
    float: left;
    margin-left: 20px;
    margin-right: 20px;
    line-height: 400px;
}

.buttonGroup {
    height: 500px;
}

.buttonMain .hover {
    position: absolute;
    width: inherit;
    height: inherit;
    line-height: inherit;
    margin: 0;
    padding: 0;
    text-align: center;
    overflow: show;
    color: #FFF;
}

.buttonMain .show {
    position: absolute;
    width: inherit;
    height: inherit;
    line-height: inherit;
    margin: 0;
    padding: 0;
    text-align: center;
    overflow: show;
    color: #FFF;
    background-color: #AAF;
    opacity: 0;
}

.buttonMain:hover .show {
    opacity: 1;
}

.buttonMain:hover .hover {
    opacity: 0;
}

.inFront {
    background-color: transparent !important;
}

.title {
    line-height: normal !important;
    text-decoration: underline;
    font-size: 30pt;
    font-weight: 600;
}

Answer 1

z-index 将执行如下操作

.menuBar ul {
    padding: 0;
    list-style-type: none;
    position: relative;  // Just changed the spelling of position
    z-index:1000;  // Added 
}

http://jsfiddle.net/peqh662a/