导航条上的Z-index问题

Z-index issue on navbar

本文关键字：Z-index 问题 导航      更新时间：2023-09-26

我的网站导航栏菜单有一些问题。我想要主菜单，子菜单和子菜单。所以总共有3层

到目前为止，我已经得到了2个级别的工作，但我不能得到第三个级别下的第二个z索引。

我尝试过的任何东西都与我在小屏幕上显示select而不是菜单时所做的jQuery脚本混淆。

我该怎么做呢?

小提琴>(产品Oticon)。

<header>
    <select class="menu_mobile_top">
        <option>Home</option>
        <option>Services</option>
        <option>Products</option>
        <option>Shop</option>
        <option>Prices</option>
        <option>About</option>
        <option>Contact</option>
    </select>
    <nav>
        <ul class="nav">                    
            <li role="presentation" class="active"><a href="#">Home</a></li>
            <li role="presentation"><a href="#">Services</a>
                <ul class="subnav">
                    <li role="presentation"><a href="#">Service 1</a>
                    <li role="presentation"><a href="#">Service 2</a>
                    <li role="presentation"><a href="#">Service 3</a>
                </ul>
            </li>
            <li role="presentation"><a href="#">Products</a>
                <ul class="subnav">
                    <li role="presentation"><a href="#">Phonak</a></li>
                    <li role="presentation"><a href="#">ReSound</a></li>
                    <li role="presentation"><a href="#">Siemens</a></li>
                    <li role="presentation"><a href="#">Starkey</a></li>
                    <li role="presentation"><a href="#">Widex</a></li>
                    <li role="presentation"><a href="#">Oticon</a>
                        <ul class="subnavoptions">
                            <li role="presentation"><a href="#">Test1</a></li>
                            <li role="presentation"><a href="#">Test 2</a></li>
                        </ul>
                    </li>
                    <li role="presentation"><a href="#">Unitron</a></li>
                    <li role="presentation"><a href="#">Bernafon</a></li>
                </ul>
            </li>
            <li role="presentation"><a href="#">Shop</a></li>
            <li role="presentation"><a href="#">Prices</a></li>
            <li role="presentation"><a href="#">About</a></li>
            <li role="presentation"><a href="#">Contact</a></li>
        </ul>
    </nav>
</header>
CSS

    body {
    font-size: 0;
    text-align: center;
    background-image: url('../images/bg.png');
    background-repeat: repeat;
    font-family: 'Montserrat', sans-serif;
}
header {
    width: 100%;
    height: 50px;
    background: #304770;
    z-index: 10;
}
h1 {
    font-family: 'Montserrat', sans-serif;
    font-weight: bold;
    font-size: 34pt;
}
a {
    text-decoration: none;
    color: inherit;
}
nav {
    position: relative;
    width: 100%;
    z-index: 10;
}
a:hover {
    text-decoration: none;
    color: inherit;
}
::-webkit-input-placeholder {
   color: #99C2EC;
}
:-moz-placeholder { /* Firefox 18- */
   color: #99C2EC;
}
::-moz-placeholder {  /* Firefox 19+ */
    color: #99C2EC;
}
:-ms-input-placeholder {  
    color: #99C2EC;
}
.bodyframe {
    display: inline-block;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.6);
}
.div_container {
    max-width: 1460px;
    width: 100%;
    display: inline-block;
    margin: 0 auto;
}
.logo-div {
    padding: 15px 0 10px;
}
.logo-div div {
    display: inline-block;
    width: 50%;
    font-size: 14px;
    color: #304770;
}
.center {
    margin: 0 auto;
}
.nav-offset {
    display: inline-block;
}
.nav {
    height: 50px;
    display: block;
    position: relative;
    list-style: none;
    background: #304770;
}
.nav li {
    display: inline-block;
    background-color: #304770;
    margin: 0 5px;
    position: static;
}
.nav li a {
    padding: 12px 15px;
    font-size: 18px;
    color: #EFEFEF;
    display: block;
}
.nav li.active a {
    color: orange;
}
.nav > li.active > a:before {
    width: 100%;
}
.nav li:hover > a {
    background-color: #304770;
    color: orange;
    transition: color 0.25s;
}
.nav > li > a:before {
    content: "";
    display: block;
    position: absolute;
    left: 0;
    bottom: 0;
    height: 3px;
    width: 0;
    background-color: orange;
    -webkit-transition: width 0.2s;
    -moz-transition: width 0.2s;
    -o-transition: width 0.2s;
    transition: width 0.2s;
}
.nav > li:nth-last-of-type(1) > a:after {
    display: none;
}
.nav li a:hover:before {
    width: 100%;
}
.nav > li > a:after {
    content: "";
    display: block;
    position: absolute;
    right: -8px;
    top: 21px;
    height: 6px;
    width: 6px;
    background: #ffffff;
    opacity: .5;
}
.nav li:hover .subnav {
    top: 49px;  
}
.subnav {
    border-bottom: 1px solid #304770;
    width: 100%;
    list-style-type: none;
    display: block;
    position: absolute;
    top: 12px;
    z-index: -1;
    left: 0;
    margin: 0;
    padding: 0;
    background-color: #ccc;
    transition: top 0.2s;
    -webkit-transition: top 0.2s;
    -moz-transition: top 0.2s;
    -o-transition: top 0.2s;
    -webkit-transition-delay: 0.05s;
    -moz-transition-delay: 0.05s;
    -o-transition-delay: 0.05s;
    transition-delay: 0.05s;
}
.subnav > li {
    display: inline-block;
    background-color: #ccc;
    margin: 0;
    padding: 0 5px;
}
.subnav li a {
    padding: 8px 10px;
    font-size: 14px;
    color: #304770;
    display: block;
}
.subnav li:hover .subnavoptions {
    top: 36px;  
}
.subnavoptions {
    border-bottom: 1px solid #304770;
    width: 100%;
    list-style-type: none;
    display: block;
    position: absolute;
    top: 0px;
    z-index: -2;
    left: 0;
    margin: 0;
    padding: 0;
    background-color: #EFEFEF;
    transition: top 0.2s;
    -webkit-transition: top 0.2s;
    -moz-transition: top 0.2s;
    -o-transition: top 0.2s;
    -webkit-transition-delay: 0.05s;
    -moz-transition-delay: 0.05s;
    -o-transition-delay: 0.05s;
    transition-delay: 0.05s;
}
.subnavoptions li {
    display: inline-block;
    background-color: #ccc;
    margin: 0 5px;
}
.subnavoptions li a {
    padding: 8px 10px;
    font-size: 14px;
    color: #304770;
    display: block;
}
.menu_mobile_top {
    display: none;
    position: relative;
    font-size: 16px;
    top: 5px;
    background-color: #2A333F;
    border: 1px solid transparent;
    color: #EFEFEF;
    width: 250px;
    margin: 5px 0;
    padding: 3px;
}
.menu_mobile_top:focus, option:focus {
    outline: none !important;
    border-color: orange;
}

我没有看到为第三层菜单定义的样式。添加以下内容并尝试。

.subnavoptions li a li{
top:50px;

}

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