我建立了一个网站，其中有各个部分，但有一个特定的部分，我想应用视差效果。我搜索了很多，并设法找到了这篇文章，它描述了如何使用CSS实现视差效果。我的问题是，我并没有真正理解它，无论我多么努力，它似乎都不起作用。
我认为这可能是我有麻烦，因为我的HTML的结构，不一定是因为提供的代码不正确。有人能看出我错在哪里吗?
请参阅我的JSFiddle或见下面:
.padding {display:block;height:200px;background:#ccc;}
/********** DEFINE THE STYLES FOR THE SEMINARS SECTION **********/
#seminars {position:relative;background:transparent;background-size:cover;height:485px;}
#seminars::after {content:'';display:block;position:absolute;background-image: linear-gradient(to bottom, blue 0%, red 100%);height:885px;width:100%;margin-top:-200px;z-index:-1;}
/* Define the seminar content */
#seminar_content {position:relative;float:left;width:600px;top:110px;left:100px;}
#seminar_content h1,
#seminar_content p
{color:#fff;}
#seminar_content h1 {font-size:33px;font-weight:normal;padding:0;margin:0 0 30px;}
#seminar_content p {font-size:16px;line-height:150%;}<section class="padding"></section>
<section id="seminars">
<div class="mn_content">
<article id="seminar_content">
<h1>Discover lorem ipsum seminar</h1>
<p>This is Photoshop's version of Lorem Ipsum. Proin gravida nibh vel velit auctor aliquet. Aenean sollicitudin, lorem quis bibendum auctor, nisi elit consequat ipsum, nec sagittis sem nibh id elit.</p>
</article>
</div>
</section>
<section class="padding"></section>我尝试过的代码如下:
perspective: 1px;
transform: translateZ(0);
我想用视差表示的是#seminars::after
如果这是不可能实现与CSS作为我的html结构的结果，有人可以指出我在实现这与javascript或jQuery的正确方向?
你说的视差是什么意思?让两个背景在不同的计时函数中移动不能仅通过CSS实现。jQuery中有上千种不同的插件可以实现这种效果。一个示例是:
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery Parallax Plugin Demo</title>
<base href="http://ianlunn.co.uk/plugins/jquery-parallax/" />
<link href="style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script type="text/javascript" src="scripts/jquery.parallax-1.1.3.js"></script>
<script type="text/javascript" src="scripts/jquery.localscroll-1.2.7-min.js"></script>
<script type="text/javascript" src="scripts/jquery.scrollTo-1.4.2-min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#nav').localScroll(800);
//.parallax(xPosition, speedFactor, outerHeight) options:
//xPosition - Horizontal position of the element
//inertia - speed to move relative to vertical scroll. Example: 0.1 is one tenth the speed of scrolling, 2 is twice the speed of scrolling
//outerHeight (true/false) - Whether or not jQuery should use it's outerHeight option to determine when a section is in the viewport
$('#intro').parallax("50%", 0.1);
$('#second').parallax("50%", 0.1);
$('.bg').parallax("50%", 0.4);
$('#third').parallax("50%", 0.3);
})
</script>
</head>
<body>
<ul id="nav">
<li><a href="#intro" title="Next Section"><img src="images/dot.png" alt="Link" /></a></li>
<li><a href="#second" title="Next Section"><img src="images/dot.png" alt="Link" /></a></li>
<li><a href="#third" title="Next Section"><img src="images/dot.png" alt="Link" /></a></li>
<li><a href="#fifth" title="Next Section"><img src="images/dot.png" alt="Link" /></a></li>
</ul>
<div id="intro">
<div class="story">
<div class="float-left">
<h2>(Almost) Static Background</h2>
<p>This section has a background that moves slightly slower than the user scrolls. This is achieved by changing the top position of the background for every pixel the page is scrolled.</p>
</div>
</div> <!--.story-->
</div> <!--#intro-->
<div id="second">
<div class="story"><div class="bg"></div>
<div class="float-right">
<h2>Multiple Backgrounds</h2>
<p>The multiple backgrounds applied to this section are moved in a similar way to the first section -- every time the user scrolls down the page by a pixel, the positions of the backgrounds are changed.</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean nibh erat, sagittis sit amet congue at, aliquam eu libero. Integer molestie, turpis vel ultrices facilisis, nisi mauris sollicitudin mauris, volutpat elementum enim urna eget odio. Donec egestas aliquet facilisis. Nunc eu nunc eget neque ornare fringilla. Nam vel sodales lectus. Nulla in pellentesque eros. Donec ultricies, enim vitae varius cursus, risus mauris iaculis neque, euismod sollicitudin metus erat vitae sapien. Sed pulvinar.</p>
</div>
</div> <!--.story-->
</div> <!--#second-->
<div id="third">
<div class="story">
<div class="float-left">
<h2>What Happens When JavaScript is Disabled?</h2>
<p>The user gets a slap! Actually, all that jQuery does is moves the backgrounds relative to the position of the scrollbar. Without it, the backgrounds simply stay put and the user would never know they are missing out on the awesome! CSS2 does a good enough job to still make the effect look cool.</p>
</div>
</div> <!--.story-->
</div> <!--#third-->
<div id="fifth">
<div class="story">
<p>Check out my new plugin <a href="http://www.sequencejs.com" title="Sequence.js">Sequence.js</a> for parallax effects and a whole lot more!</p>
<h2>Ian Lunn</h2>
<ul>
<li><strong>Twitter</strong>: <a href="http://www.twitter.com/IanLunn" title="Follow Ian on Twitter">@IanLunn</a></li>
<li><strong>GitHub</strong>: <a href="http://www.github.com/IanLunn" title="Follow Ian on GitHub">IanLunn</a></li>
<li><strong>Website</strong>: <a href="http://www.ianlunn.co.uk/" title="Ian Lunn Design">www.ianlunn.co.uk</a></li>
</ul>
<p>This demo is based on the <a href="http://www.nikebetterworld.com" title="Nike Better World">Nikebetterworld.com</a> website.</p>
<h2>Credits</h2>
<p>This plugin makes use of some scripts and images made by others:</p>
<ul>
<li><a href="http://flesler.blogspot.com/2007/10/jqueryscrollto.html" title="jQuery ScrollTo">jQuery ScrollTo</a></li>
<li><a href="http://downloads.dvq.co.nz/" title="Background Textures">Wooden and Pyschedlic Background Textures</a></li>
<li><a href="http://www.sxc.hu/photo/931435" title="Trainers Image">Trainers Image</a></li>
<li><a href="http://www.sxc.hu/photo/1015485" title="Basketball Image">Basketball Image</a></li>
<li><a href="http://www.sxc.hu/photo/563767" title="Bottles Image">Bottles Image</a></li>
</ul>
</div> <!--.story-->
</div> <!--#fifth-->
</body>
</html>纯CSS方式
抱歉我之前的东西。是的，有个办法。看看这个网站:pure-css-parallax-websites