嗨我正在为我的网站使用滚动效果。因此，当我向下滚动页面的信息时，将滚动屏幕顶部的图片。它工作正常，直到我在信息的左边添加了一些图片。之前，滚动效果将在您结束时停止，但是当我添加2张以上的图片时，滚动效果无法正常工作。而不是停止你能够滚动更多，并看到灰色背景我猜。此外，如果我删除一些数据，图片会自动向上移动而不告诉他们。任何帮助将不胜感激
https://jsfiddle.net/5b7jn2ww/2/
<title>Black Cab Tours</title>
<body>
<div id="container">
<header>
<div id="header-content">
<h1><a href="#"></a></h1>
<nav>
<ul>
<li><a href="#">Hello</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Review</a></li>
<li><a href="#">Contact</a></li>
</ul>
</nav>
</div>
</header>
<div id="banner">
<h2></h2>
</div>
<div id="content">
<article>
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</article>
</div>
<div class="pics">
<ul class="gallery">
<li><a class="pic-2"><img src="img/Big-Ben.jpg" alt="Photograph of clouds and sunlight" /></a></li>
<li><a class="pic-2"><img src="img/Big-Ben.jpg" alt="Photograph of clouds and sunlight" /></a></li>
</ul>
</div>
</div>