<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>CSS动态效果</title>
<style>
div .title{
background: linear-gradient(to right, red, yellow) no-repeat right bottom;
background-size: 0% 2px;
transition: background-size 1.3s ease-in-out;
}
div .title:hover {
background-size: 100% 2px;
background-position: left bottom;
}
</style>
</head>
<body>
<div>
<span class="title">
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<br>腾讯回应全球首个满级 QQ 账号诞生,256 级用户集齐四皇冠获得“金企鹅”
<br>新加坡字节跳动食物中毒案进展:云海肴被控食品质量存问题 雷军:小米高阶驾驶培训将在全国免费培训一万名车主
</span>
</div>
</body>
</html>