用vue3写一个页面精美的内容丰富带背景图的登陆页面

以下是一个使用 Vue3 写的页面精美的内容丰富带背景图的登录页面：

<template>
  <div class="login-container">
    <div class="background"></div>
    <div class="login-card">
      <div class="logo">
        <img src="./assets/logo.png" alt="Logo">
        <h2>LOGIN</h2>
      </div>
      <form class="login-form" @submit.prevent="login">
        <div class="form-group">
          <label for="username">Username</label>
          <input type="text" id="username" v-model="username" required>
        </div>
        <div class="form-group">
          <label for="password">Password</label>
          <input type="password" id="password" v-model="password" required>
        </div>
        <button type="submit">Login</button>
      </form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      username: '',
      password: ''
    };
  },
  methods: {
    login() {
      // 登录逻辑
    }
  }
};
</script>

<style scoped>
.login-container {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f5f5f5;
}

.background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('./assets/background.jpg');
  background-size: cover;
  opacity: 0.5;
  z-index: -1;
}

.login-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 400px;
  padding: 40px;
  background-color: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.logo {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.logo img {
  width: 50px;
  height: 50px;
  margin-right: 10px;
}

.logo h2 {
  font-size: 24px;
  font-weight: bold;
  color: #333;
}

.login-form {
  display: flex;
  flex-direction: column;
  width: 100%;
}

.form-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}

label {
  font-size: 16px;
  font-weight: bold;
  color: #333;
  margin-bottom: 10px;
}

input {
  padding: 10px;
  border-radius: 4px;
  border: 1px solid #ccc;
}

button {
  padding: 10px 20px;
  border-radius: 4px;
  border: none;
  background-color: #2ecc71;
  color: #fff;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background-color: #27ae60;
}
</style>

这个登录页面使用了背景图片，让页面看起来更加精美。在样式方面，使用了圆角、阴影、渐变等效果，使页面看起来更加美观。同时，使用了 Logo 和自适应的表单布局，让页面看起来更加专业和贴近实际应用场景。