body {
    margin: 0;
    font-family: "Microsoft YaHei", Arial, sans-serif;
    background: #f5f7fb;
  }
  
  .login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .login-card {
    width: 360px;
    background: #fff;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  }
  
  .login-card h1 {
    margin-top: 0;
  }
  
  .login-card form {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  
  .login-card label {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  
  .login-card input {
    border: 1px solid #d0d7e2;
    border-radius: 8px;
    padding: 10px 12px;
  }
  
  .login-card button {
    border: none;
    background: #2563eb;
    color: #fff;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
  }
  
  .message {
    margin-top: 12px;
    color: #dc2626;
  }