HTML+CSS实现渐变色标签，鼠标经过效果

完成图：

鼠标经过的过渡效果图：

HTML代码块：

<div class="container">

      <!-- 卡片 -->
       <div class="card">
         <!-- 卡片内容 -->
         <div class="face face1">
           <h2>hello</h2>
           <p>美女</p>
         </div>
         <!-- 外层 -->
         <div class="face face2">
           <h2>01</h2>
         </div>
       </div>

       <div class="card">
        <div class="face face1">
          <h2>hey</h2>
          <p>帅哥</p>
        </div>
        <div class="face face2">
          <h2>02</h2>
        </div>
      </div>

      <div class="card">
        <div class="face face1">
          <h2>hi</h2>
          <p>大哥</p>
        </div>
        <div class="face face2">
          <h2>03</h2>
        </div>
      </div>
    </div>

CSS页面代码块：

body{
  margin: 0;
  padding: 0;
  display: flex;
  min-height: 100vh;
  justify-content: center;
  align-items: center;
  background: linear-gradient(45deg,#FF69B4,#9400D3);
}
.container{
  width: 1200px;
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(350px,1fr));
  grid-gap: 15px;
  margin: 0 auto;
}
.container .card{
  position: relative;
  width: 300px;
  height: 400px;
 margin: 0 auto;
 background: #fff;
 box-shadow: 0 15px 60px rgba(0, 0, 0, .5);
}
.container .card .face{
  width: 100%;
  height: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}
.container .card .face .face1{
  box-sizing: border-box;
  padding: 20px;
  
}
.container .card  .face1 h2{
  margin: 0;
  padding: 0;
  
}
.container .card  .face2{
  background: #111;
  transition: .5s;
}
/* 经过外层高度变小 */
.container .card:hover  .face2{
  height: 60px;
}
/* 经过字体变小 */
.container .card:hover  .face2 h2{
  font-size: 2em;
}
/* 三个卡片外层渐变色 */
.container .card:nth-child(1)  .face2{
  background: linear-gradient(45deg,#FFC0CB,#FF00FF);
}
.container .card:nth-child(2)  .face2{
  background: linear-gradient(45deg,#00FA9A,#1E90FF);
}
.container .card:nth-child(3)  .face2{
  background: linear-gradient(45deg,#FFFF00,#FF1493);
}
.container .card  .face2::before{
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width:50% ;
  height: 100%;
  background: rgba(255, 255,255, .1);
}
.container .card  .face2 h2{
  margin:0;
  padding: 0;
  font-size: 10em;
  color: #fff;
  transition: 0.5s;
}

记得在index页面引入css样式~`

<link rel="stylesheet" href="index.css">