* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea, #764ba2);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-form {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

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

.login-header h1 {
    color: #333;
    font-size: 24px;
}

.login-form h2 {
    text-align: center;
    color: #333; /* 修改为深灰色，确保在白色背景上可见 */
    margin-bottom: 20px;
    font-size: 18px;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.login-btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.login-footer {
    text-align: center;
    margin-top: 20px;
    color: #777;
    font-size: 14px;
}

.error-message {
    color: #e74c3c;
    text-align: center;
    margin-top: 10px;
    display: none;
}

/* ... existing code ... */

@media (max-width: 480px) {
    .login-container {
        padding: 20px;
    }
    
    .login-form {
        padding: 30px 20px;
    }
}

/* 新增：公司商号样式 */
.page-branding {
    position: absolute;
    bottom: 20px;
    width: 100%;
    text-align: center;
    color: white;
    font-size: 0.9rem;
}

.company-name {
    margin: 0 0 5px 0;
    font-size: 1rem;
    font-weight: bold;
}

.company-since {
    margin: 0;
    font-size: 0.8rem;
    opacity: 0.8;
}

.page-footer {
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  line-height: 1.4;
}

.page-footer p {
  margin: 4px 0;
}