html - 悬停时 float 标题不会出现在图像上

Question

所以我将标题设置为随着滚动而淡出，但随着悬停而出现。它适用于所有图像，但 Portfolio 部分中的猫图片。我调整了 z-indexes 并尝试了一切。标题将不会出现在 h4 或任何内容下。问题文件是 portfolio.html。页眉显示在其他图片之上。这让我发疯。 https://github.com/alil0rphan/Basic-Portfolio

/* Eastablish body parameters */
body {
	background-image: url("../images/circlesbg.png");
	background-color: #D7CFC3;
	color: #777777;
	margin: 0px auto;
	font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
}
/* Create Heading block */
h1 {
	background-color: #4AAAA5;
	display: inline-block;
	padding: 25px 20px 0px 20px;
	height: 55px;
	margin: 0px auto;
	font-family: "Georgia", Times, "Times New Roman", serif;
	color: #FFFFFF;
	font-size: 36px;
}
h1,
h2,
h3 {
	font-weight: bold;
}
section {
	background-color: #ffffff;
}
/*Establishes header on top */
header {
	background-color: #FFFFFF;
	border-bottom: solid 2px #cccccc;
	margin: 0px auto;
	width: 100%;
	height: 80px;
	top: 0px;
	position: fixed;
	z-index: 99;
}
/* establishes tranparency on scroll */
body.scrolled #main-menu {
	opacity: 0.2;
	transition: opacity .2s;
	z-index: 98;
}
body.scrolled #main-menu:hover {
	opacity: 1.0;
	transition: opacity .2s;
	z-index: 97;
}
/* Makes sure heading and contents line up */
.banner {
	width: 960px;
	margin: 0px auto;
	height: 60px;
	position: relative;
}
/* Navigational link parameters established */
.link-box {
	padding: 30px 0px 0px 20px;
	height: 55px;
	right: 0px;
	display: inline;
	position: absolute;
}
/* Establishes main content parameters (container and connect blocks) */
.content {
	width: 960px;
	margin: 0px auto;
}
/* Establish main unique block on each page */
.container {
	width: 590px;
	border: solid 2px #dddddd;
	float: left;
	margin: 115px 0px 200px 0px;
	padding: 30px;
}
/* Link attributes including hover */
a {
	color: #777777;
	text-decoration: none;
	font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
	word-spacing: 10px;
}
a:hover {
	color: #4AAAA5;
}
/* Establishing heading fonts  for container and connect box*/
h2 {
	color: #4AAAA5;
	font-family: "Georgia", Times, "Times New Roman", serif;
	border-bottom: solid 3px #dddddd;
	padding-bottom: 20px;
	margin-bottom: 10px;
	font-size: 32px;
}
h3 {
	color: #4AAAA5;
	font-family: "Georgia", Times, "Times New Roman", serif;
	border-bottom: solid 1px #dddddd;
	padding-bottom: 20px;
	margin-bottom: 10px;
	font-size: 24px;
}
/* adjusts line height and paragraphs for the about me section */
p {
	line-height: 2.5;
	font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
	margin-top: 0px;
	color: #777777;
}
/* My picture on the index file */
#face {
	float: left;
	display: inline;
	margin-top: 10px;
	margin-right: 15px;
	width: 250px;
}
/* Connections box parameters with icons */
.connect {
	width: 210px;
	border: solid 2px #dddddd;
	float: right;
	margin-top: 115px;
	padding: 30px;
}
/* Establish icon aesthetics and behaviors with hover features */
.icons {
	display: inline-block;
	margin: 0px 5px 30px 0px;
	width: 60px;
	height: 60px;
}
.icons:hover {
	box-shadow: 4px 4px 2px #4AAAA5;
}
/* cat pictures and parameters established with hover features*/
.cats {
	display: inline-block;
	margin: 10px 40px 40px 0px;
	width: 230px;
}
.cats:hover {
	box-shadow: 4px 4px 2px #4AAAA5;
}
.image { 
   position: relative; 
   display: inline-block;
}
/* establishes parameters for banners over the cat images */
h4 { 
   position: absolute; 
   width: 230px;
   background-color: #4AAAA5;
   color: #FFFFFF;
   font-family: "Georgia", Times, "Times New Roman", serif;
   text-align: center;
   padding: 10px 0px 10px 0px;
   margin: auto;
   left: 0px;
   bottom: 50px;
}
/* Establishes sticky footer */
footer {
	background-color: #666666;
	opacity: 0.85;
	text-align: center;
	border-top: solid 6px #4AAAA5;
	position: fixed;
	width: 100%;
	bottom: 0px;
	padding-top: 30px;
	padding-bottom: 30px;
	color: #BFBEBC;
	font-size: 10px;
	font-family: 'Arial', 'Helvetica Neue', Helvetica, sans-serif;
}
.clearfix::after {
	content: "";
	display: block;
	clear: both;
}
/* Establishes input attributes for the contact/ message form. */
input[type=text], select, textarea {
    width: 100%;
    padding: 12px; 
    border: 2px solid #DDDDDD;
    border-radius: 4px; 
    box-sizing: border-box; 
    margin-bottom: 16px; 
    resize: vertical
}
input[type=submit] {
    background-color: #4AAAA5;
    color: #FFFFFF;
    padding: 12px 20px;
    border: none;
    cursor: pointer;
}
/* Makes the Submit button change color when mouse hovers over */
input[type=submit]:hover {
    background-color: #666666;
}
::-webkit-input-placeholder { /* WebKit browsers */
    color: #666666;
    opacity: 0.5 !important;
}
label {
	color: #8F7E7F;
}

<!DOCTYPE html>
<html lang="en-us">
<head>
	<meta charset="UTF-8">
	<title>Portfolio</title>
	<link rel="stylesheet" type="text/css" href="assets/css/reset.css">
	<link rel="stylesheet" type="text/css" href="assets/css/style.css">
</head>
<div id="main-menu">
	<header>
		<div class="banner">
			<h1>John Bendfeldt</h1>
<!-- Navigational links. -->
			<div class="link-box">
				<a href="index.html">About | </a>
				<a href="portfolio.html">Porfolio | </a>
				<a href="contact.html">Contact</a>
			</div>
		</div>
	</header>
</div>
<body>
	<div class="content">
<!-- Big content box in middle	-->
			<section class="container">
			<h2>Portfolio</h2>
			<br>
<!-- Images for the main content block -->
			<div class="image">
				<img src="assets/images/cat1.jpg" class="cats" alt="kitten">
				<h4>Building Websites</h4>
			</div>
			<div class="image">
				<img src="assets/images/cat2.jpg" class="cats" alt="kitten">
				<h4>RPG</h4>
			</div>
			<div class="image">
				<img src="assets/images/cat3.jpg" class="cats" alt="kitten">
				<h4>Trivia Game</h4>
			</div>
			<div class="image">
				<img src="assets/images/cat4.jpg" class="cats" alt="kitten">
				<h4>Rock Paper Scissors</h4>
			</div>
			<div class="image">
			<img src="assets/images/cat5.jpg" class="cats" alt="kitten">
			<h4>American Freedom</h4>
			</div>
		</section>
<!-- connect with me box -->
		<section class="connect">
			<h3>Connect with Me</h3>
			<br>
			<a href="https://github.com/alil0rphan" target="_blank"><img src="assets/images/Github-icon.png" class="icons" alt="Github-icon" title="GitHub"></a>
			<a href="https://www.linkedin.com/in/john-bendfeldt-b32736130/" target="_blank"><img src="assets/images/linkedin-icon.png" class="icons" alt="linkedin-icon" title="LinkedIn"></a>
			<a href="http://stackoverflow.com/users/7700030/john-bendfeldt" target="_blank"><img src="assets/images/stackoverflow-icon.png" class="icons" alt="stackoverflow-icon" title="Stackoverflow"></a>
		</section>
	</div>
</body>
<footer>
	© Copywrite 2017 John Bendfeldt
</footer>
<!-- makes the header transparent on scroll -->
<script type="text/javascript">
	window.addEventListener('scroll', function () {
  	document.body.classList[
    window.scrollY > 20 ? 'add': 'remove'
  ]('scrolled');
});
</script>
</html>

`

Answer 1

尝试在 body.scrolled #main-menu 选择器中添加一个 position: absolute;。它看起来像这样:

body.scrolled #main-menu {
    opacity: 0.2;
    transition: opacity .2s;
    z-index: 98;
    position: absolute;
}