html+css实现响应式卡片悬停效果

话不多，看效果先：

卡片悬停，响应式卡片，简约效果。

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>