HTML+CSS前端动态响应用户登录界面

news2024/11/15 8:12:59

day2 知道了动态响应设计的概念，在原先登录界面的基础上进行升级

动态响应

由于前端页面需要在不同大小和分辨率的屏幕上显示，所以需要它具有动态适应的特性。
常用的方式是在 css 文件中用 @media 动态查询，同时使用 flex 弹性布局。

例如：本文中

@media screen and (max-width: 600px) {
.content {
background: url(./background.jpg) no-repeat;
display: flex;
}

规定了在手机屏幕大小下的背景

login_responsive_simple.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="login_responsive_simple.css" />
  </head>
  <body>
    <div class="content">
      <div class="login">
        <a href="" class="banner-box"></a>
        <div class="login-box">
          <h1>Login</h1>
          <input type="text" placeholder="Username" />
          <input type="text" placeholder="Password" />
          <button class="login-btn">OK</button>
        </div>
      </div>
    </div>
  </body>
</html>

login_responsive_simple.css

* {
  margin: 0;
  padding: 0;
}

.content {
  width: 100vw;
  height: 100vh;
  background: url(./background.jpg) no-repeat;
  display: flex;
  justify-content: center;
  align-items: center;
}

.login {
  width: 800px;
  height: 360px;
  position: relative;
  background-color: black;
  border-radius: 30px;
  padding: 30px;
}

.banner-box {
  display: inline-block;
  width: 500px;
  height: 100%;
  background: url(./background.jpg) no-repeat;
  background-size: cover;
  border-radius: 20px 0 0 20px;
}

.login-box {
  width: 330px;
  height: 100%;
  background-color: rgb(244, 224, 198);
  position: absolute;
  top: 0;
  right: 0;
  border-radius: 0 30px 30px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.login-box > h1 {
  font-size: 36px;
  margin: 60px 0;
  color: black;
}

.login-box > input {
  font-size: 18px;
  margin-bottom: 20px;
  width: 200px;
  height: 36px;
  padding: 0 20px;
  border-radius: 36px;
  border: none;
  outline: none;
}

.login-btn {
  margin-top: 20px;
  width: 200px;
  height: 40px;
  background-color: black;
  border: none;
  border-radius: 40px;
  color: aliceblue;
  font-size: 18px;
}

@media screen and (max-width: 900px) {
  .login {
    margin: 0 30px;
  }
  .banner-box {
    border-radius: 20px;
  }
  .login-box {
    background-color: rgba(244, 224, 198, 0.8);
  }
}

@media screen and (max-width: 600px) {
  .content {
    background: url(./background.jpg) no-repeat;
    display: flex;
  }
  .login {
    background-color: rgba(244, 224, 198, 0.8);
  }
  .banner-box {
    display: none;
  }
  .login-box {
    position: initial;
    margin: 0 auto;
    background-color: rgba(244, 224, 198, 0);
  }
}