18.一直处于底部的规则说明.html

<!DOCTYPE html>
<html lang="en">
<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>18.一直处于底部的规则说明</title>
  <style>
    *{
      margin: 0;
      padding: 0;
    }

    .container{
      height: 100vh;
      /* 关键css处 */
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .main{
      /* 关键css处 */
      flex: 1;
      background-image: linear-gradient(45deg, #ff9a9e 0%, #fad0c4 99%, #fad0c4 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
    }

    .footer{
      padding: 15px 0;
      text-align: center;
      color: #ff9a9e;
      font-size: 14px;
    }


  </style>
</head>
<body>
  <div class="container">
    <div class="main">我是内容区域</div>
    <div class="footer">规则说明</div>
  </div>
</body>
</html>