有人能帮我找出为什么 <h5>
元素上的动画不起作用吗?
#hero h5 {
animation: fadein 2s;
-moz-animation: fadein 2s; /* Firefox */
-webkit-animation: fadein 2s; /* Safari and Chrome */
-o-animation: fadein 2s; /* Opera */
font-weight: strong;
font-size: 28px;
}
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<section id="hero">
<div class="content">
<div class="container">
<div class="row">
<h5>Lorem Ipsum Demo Title</h5>
</div><!-- row -->
</div> <!-- container -->
</div> <!-- content -->
</section><!-- section -->