* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
  }

  body {
    background: 
      linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
      url("https://api.paugram.com/wallpaper/") center/cover no-repeat fixed;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
  }

  .login-card {
    background: rgba(255, 255, 255, 0.95);
    width: 100%;
    max-width: 400px;
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
    padding: 40px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transform: translateY(-20px);
    animation: fadeInUp 0.6s ease-out;
  }

  @keyframes fadeInUp {
    from {
      opacity: 0;
      transform: translateY(30px);
    }
    to {
      opacity: 1;
      transform: translateY(-20px);
    }
  }

  .login-header {
    text-align: center;
    margin-bottom: 30px;
  }

  .login-header h2 {
    color: #2c3e50;
    font-size: 28px;
    margin-bottom: 10px;
  }

  .login-header p {
    color: #7f8c8d;
    font-size: 14px;
  }

  .login-form {
    margin-bottom: 25px;
  }

  .form-group {
    margin-bottom: 20px;
    position: relative;
  }

  .form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
    font-size: 14px;
  }

  input[type="text"],
  input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    border: none;
    background: #f8f9fa;
    border-radius: 10px;
    font-size: 16px;
    color: #2c3e50;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 2px solid transparent;
  }

  input[type="text"]:focus,
  input[type="password"]:focus {
    outline: none;
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.2);
    border-color: #3498db;
    background: #fff;
  }

  .login-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #3498db, #1a5276);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
    margin-top: 10px;
  }

  .login-btn:hover {
    background: linear-gradient(135deg, #2980b9, #154360);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
  }

  .login-btn:active {
    transform: translateY(0);
  }

  .msg {
    text-align: center;
    color: #e74c3c;
    font-size: 14px;
    height: 20px;
    margin-top: 15px;
    transition: all 0.3s ease;
  }

  .footer {
    text-align: center;
    margin-top: 30px;
    color: #95a5a6;
    font-size: 12px;
  }

  /* 响应式设计 */
  @media (max-width: 480px) {
    .login-card {
      padding: 30px 20px;
    }
    
    .login-header h2 {
      font-size: 24px;
    }
  }