/* 默认主题样式 */
:root {
    --container-width: 1200px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.navbar-brand {
    font-weight: bold;
}

.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: box-shadow 0.3s ease;
    margin-bottom: 2rem;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.card-title a {
    color: #007bff;
    text-decoration: none;
}

.card-title a:hover {
    color: #0056b3;
    text-decoration: underline;
}

.pagination .page-link {
    color: #007bff;
}

.pagination .page-item.active .page-link {
    background-color: #007bff;
    border-color: #007bff;
}

.footer {
    background-color: #343a40;
    color: #fff;
    padding: 2rem 0;
    margin-top: 2rem;
}

.main-content {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.sidebar {
    background: #e9ecef;
    border-radius: 8px;
    padding: 1.5rem;
}

/* 验证码样式 */
.captcha-image {
    border: 1px solid #ddd;
    border-radius: 4px;
    height: 38px;
    width: 120px;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 15px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .sidebar {
        padding: 1rem;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 1rem;
    }
}

@media (max-width: 576px) {
    .main-content {
        padding: 0.75rem;
    }
    
    .sidebar {
        padding: 0.75rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
}