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我有一组图像，它将在我将来的项目中充当导航。我在第一张图片上放了另一个不透明的彩色div。我想让它在用户悬停div时获得不透明度。我已经添加了大小和位置相同的类，以悬停div作为其父母。我已经设置绝对悬停div和相对于父容器的位置。div覆盖跳转到Bootstrap中的另一行
问题是：我的div出现在div下方，而不是顶端，我能用它做什么？
我已经看到类似的项目（不Bootstrap构建）与叠加而不使用z-index，但我无法避免它在我的情况下，有什么办法吗？
我想在我的悬停容器上显示文本，什么是正确的方式来做到这一点 - p，包装在一个div并放在悬停div？
<!DOCTYPE html>
<html lang="UA-ru">
<head>
<title> Portfolio</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="CSS/custom.css" type="text/css">
<link href="https://fonts.googleapis.com/css?family=Abel" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.0/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div id="rowfirst" class="container-fluid">
<div class="row" id="allrow">
<div id="elementUnique" class="col-lg-6 col-md-12 col-sm-12 col-xs-12"><img id="img1"; class="img-responsive" src="https://c1.staticflickr.com/4/3854/33471675672_df4a45ed78_b.jpg"><div class="col-lg-6 col-md-12 col-sm-12 col-xs-12" id="elementUniquehover"></div></div>
<div id="element1" class="col-lg-3 col-md-6 col-xs-12"><img id="img1"; class="img-responsive" src="https://c1.staticflickr.com/4/3856/15035927740_3c3fd4368d_h.jpg"></div>
<div id="element2" class=" col-lg-3 col-md-6 col-xs-12"><img id="img2"; class="img-responsive" src="https://c1.staticflickr.com/4/3906/14398449382_5f1d47c281_b.jpg"></div>
</div>
<div class="row">
<div id="element3" class="col-lg-3 col-md-6 col-xs-12"><img id="img3"; class="img-responsive" src="https://c1.staticflickr.com/6/5143/5679564578_8c765d819d_b.jpg"></div>
<div id="element4" class=" col-lg-3 col-md-6 col-xs-12"><img id="img4"; class="img-responsive" src="https://c1.staticflickr.com/8/7385/9938594544_bd06f9b345_b.jpg"></div>
<div id="element5" class=" col-lg-3 col-md-6 col-xs-12"><img id="img5"; class="img-responsive" src="https://c1.staticflickr.com/9/8594/15993347406_bb1bb4ef5e_b.jpg"></div>
<div id="element6" class=" col-lg-3 col-md-6 col-xs-12"><img id="img6"; class="img-responsive" src="https://c1.staticflickr.com/7/6109/6317119669_93f293eeee_b.jpg"></div>
</div>
<nav id="mynavigation" class="navbar navbar-inverse navbar-fixed-bottom">
<div class="container-fluid">
<div id="headernav" class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Portfolio</a></div>
<div class="collapse navbar-collapse" id="myNavbar">
<div id="navbarul"><ul class=" nav navbar-nav">
<li id=webli><a id="navbar">Web</a></li>
<li id="videoli"><a id="navbar">Video</a></li>
<li id="photoli"><a id="navbar">Photo</a></li>
</ul>
</div></div></div></nav>
</div>
</body>
</html>
#navbarul{
width: 20%;
margin: auto;
display: block;
}
@media only screen and (max-width : 768px){
#webli {
display:inline;
margin: 0;
font-size: 7px;
padding: 0;
line-height: 0;
}
}
@media only screen and (max-width : 768px){
#videoli {
display:inline;
margin: 0;
font-size: 7px;
padding: 0;
line-height: 0;
}
}
@media only screen and (max-width : 768px){
#photoli {
display:inline;
margin: 0;
font-size: 7px;
padding: 0;
line-height: 0;
}
}
@media only screen and (max-width : 768px){
#photoli {
display:inline;
margin: 0;
font-size: 7px;
padding: 0;
line-height: 0;
line-height: 0;
}
}
#navbar{
display: block;
font-family: "Abel", sans sans-serif;
text-transform: uppercase;
font-size: 2em;
cursor: pointer;
display: inline-block;
text-align: center;
}
#element1{
display: block;
height: 460px;
padding: 0;
margin: 0;
}
#element4{
display: block;
height:456px;
padding: 0;
margin: 0;
}
#img4{
height:100%;
width: 100%;
padding: 0;
margin: 0;
object-fit: cover;
}
#element4:hover {
outline: 5px solid rgb(255,255,77);
outline-offset: -5px;
}
#element5{
display: block;
height:456px;
padding: 0;
margin: 0;
}
#img5{
height:100%;
width: 100%;
padding: 0;
margin: 0;
object-fit: cover;
}
#element5:hover {
outline: 5px solid rgb(255,255,77);
outline-offset: -5px;
}
#element6{
display: block;
height:456px;
padding: 0;
margin: 0;
}
#img6{
height:100%;
width: 100%;
padding: 0;
margin: 0;
object-fit: cover;
}
#element6:hover {
outline: 5px solid rgb(255,255,77);
outline-offset: -5px;
}
#element3{
display: block;
height:456px;
padding: 0;
margin: 0;
}
#img3{
height:100%;
width: 100%;
padding: 0;
margin: 0;
object-fit: cover;
}
#element3:hover {
outline: 5px solid rgb(255,255,77);
outline-offset: -5px;
}
#element2{
display: block;
height:460px;
padding: 0;
margin: 0;
}
#img2{
height:100%;
width: 100%;
padding: 0;
margin: 0;
object-fit: cover;
}
#element2:hover {
outline: 5px solid rgb(255,255,77);
outline-offset: -5px;
}
#elementUnique{
display: inline-block;
position: relative;
height: 460px;
padding: 0;
margin: 0;
}
#elementUniquehover{
display: inline-block;
position: absolute;
height: 460px;
padding: 0;
margin: 0;
opacity: 0;
background-color: aqua;
transition: .5s ease;
}
#elementUnique:hover #elementUniquehover {
opacity: 1;
z-index: 20;
}
#element1:hover {
outline: 5px solid rgb(255,255,77);
outline-offset: -5px;
}
#elementUnique:hover{
outline: solid rgb(255, 255, 77) 5px;
outline-offset: -5px;
}
#img1{
height:100%;
position: relative;
width: 100%;
padding: 0;
margin: 0;
object-fit: cover;
transition: .5s ease;
}
#mynavigation{
height:6% ;
}
@media only screen and (max-width : 768px) { #mynavigation{
height:15% ;
}
}
}
#rowfirst{
width: 100%;
height: 100%;
margin: 0;
}
html {
height: 100%;
}
body {
height: 100%;
}
#allrow{
position: relative;
}
.infotext{
font-family:
}
宽度/高度：100％有帮助 – Oletem