html+css实现响应式卡片悬停效果

实现：

1. 定义标签，.kapian为最底层盒子，然后两个子盒子一个放图片，一个放文本：

<div class="kapian">
<div class="tu">
<img src="3.2.png">
</div>
<div class="wenben">
<h2>The aurora borealis</h2>
<p style="padding-bottom: 20px;">natural</p>
<p>
Aurora Borealis is a colorful luminous phenomenon that appears over the high magnetic latitude region of the planet\’s North Pole.
I love the aurora borealis. It\’s so beautiful.
</p>
</div>
</div>

2.先定义底层盒子的css基本样式，长宽等，就不详细说明了：

.kapian{
position: relative;
width: 300px;
height: 400px;
border-radius: 3px;
background-color: #fff;
box-shadow: 2px 3px 3px rgb(139, 138, 138);
overflow: hidden;
cursor: pointer;
transition: all 0.3s;
}
.kapian:hover{
box-shadow: 2px 3px 10px rgb(36, 35, 35);
}

:hover鼠标经过后盒子阴影变化。
transition: all 0.3s;过渡效果，阴影在0.3s内慢慢变化

3. 图片的基本样式，采用绝对定位：

.tu{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 300px;
overflow: hidden;

}
.tu img{
width: 100%;
height: 100%;
transition: all 0.5s;
}
.kapian:hover .tu img{
transform: scale(1.2);
filter: blur(1px);
}

:hover鼠标经过后图片变大，而且变模糊；
transform: scale(1.2);图片变大为1.2倍；
filter: blur(1px);图片变模糊；

4 .定义装文本这个盒子的基本样式，采用绝对定位：

.wenben{
position: absolute;
bottom: -200px;
width: 100%;
height: 300px;
background-color: rgb(247, 242, 242);
transition: 0.5s;
}
.kapian:hover .wenben{
bottom: 0px;
}

:hover鼠标经过后文本框绝对定位的bottom发生改变，使得呈现文本框向上展开的效果；

5 .文本框里字符的样式：

.wenben h2{
color: rgb(21, 74, 172);
line-height: 60px;
text-align: center;

}
.wenben p{
padding: 0 30px;
font-family: \’fangsong\’;
font-size: 16px;
font-weight: bold;
line-height: 20px;
text-align: center;
}

完整代码：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
box-sizing: border-box;
}
body{
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
background-image: radial-gradient(rgb(241, 238, 238),black);
}
.kapian{
position: relative;
width: 300px;
height: 400px;
border-radius: 3px;
background-color: #fff;
box-shadow: 2px 3px 3px rgb(139, 138, 138);
overflow: hidden;
cursor: pointer;
transition: all 0.3s;
}
.kapian:hover{
box-shadow: 2px 3px 10px rgb(36, 35, 35);
}
.tu{
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 300px;
overflow: hidden;

}
.tu img{
width: 100%;
height: 100%;
transition: all 0.5s;
}
.kapian:hover .tu img{
transform: scale(1.2);
filter: blur(1px);
}
.wenben{
position: absolute;
bottom: -200px;
width: 100%;
height: 300px;

background-color: rgb(247, 242, 242);
transition: 0.5s;
}
.kapian:hover .wenben{
bottom: 0px;
}
.wenben h2{
color: rgb(21, 74, 172);
line-height: 60px;
text-align: center;

}
.wenben p{
padding: 0 30px;
font-family: \’fangsong\’;
font-size: 16px;
font-weight: bold;
line-height: 20px;
text-align: center;
}
</style>
</head>
<body>
<div class="kapian">
<div class="tu">
<img src="3.2.png">
</div>
<div class="wenben">
<h2>The aurora borealis</h2>
<p style="padding-bottom: 20px;">natural</p>
<p>
Aurora Borealis is a colorful luminous phenomenon that appears over the high magnetic latitude region of the planet\’s North Pole.
I love the aurora borealis. It\’s so beautiful.
</p>
</div>
</div>
</body>
</html>