效果图
如图，当鼠标悬浮在图片上时，显示遮罩并展示具体内容
全部代码
<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.box {
width: 500px;
height: 500px;
border-radius: 40px;
overflow: hidden;
background-color: rgb(216, 135, 135);
position: relative;
}
.img {
width: 100%;
height: 100%;
border-radius: 30px;
}
.mask {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
text-align: center;
vertical-align: auto;
background: rgba(0, 0, 0, 0.35);
color: #ffffff;
opacity: 0;
}
a:hover .mask{
animation: maskframes 700ms ease-in-out forwards;
}
@keyframes maskframes {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
</style>
</head>
<body>
<div class="box">
<image class="img"
src="https://shadow.elemecdn.com/app/element/hamburger.9cf7b091-55e9-11e9-a976-7f4d0b07eef6.png"></image>
<a href="#">
<div class="mask">
<h3>A Picture of food</h3>
</div>
</a>
</div>
</body>
</html>