:root {
            --primary: #2c3e50;
            --secondary: #3498db;
            --accent: #e74c3c;
            --light: #ecf0f1;
            --dark: #2c3e50;
            --text: #333;
            --text-light: #7f8c8d;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

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

        body {
            background-color: #f9f9f9;
            color: var(--text);
            line-height: 1.6;
        }

        .paia-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        .paia-header {
            text-align: center;
            margin-bottom: 40px;
            padding: 20px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            position: relative;
            overflow: hidden;
        }

        .paia-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }

        .paia-header h1 {
            color: var(--primary);
            margin-bottom: 10px;
            font-size: 2.2rem;
        }

        .paia-header p {
            color: var(--text-light);
            max-width: 800px;
            margin: 0 auto;
        }

        .paia-card {
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            margin-bottom: 30px;
            overflow: hidden;
            transition: var(--transition);
        }

        .paia-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        .card-header {
            background-color: var(--primary);
            color: white;
            padding: 15px 20px;
            display: flex;
            align-items: center;
            cursor: pointer;
        }

        .card-header h2 {
            font-size: 1.3rem;
            margin-left: 15px;
        }

        .card-header i {
            font-size: 1.2rem;
        }

        .card-content {
            padding: 20px;
            display: none;
        }

        .card-content.active {
            display: block;
        }

        .section-title {
            color: var(--secondary);
            margin: 20px 0 10px;
            font-size: 1.1rem;
            font-weight: 600;
        }

        .info-item {
            margin-bottom: 15px;
        }

        .info-item h3 {
            display: flex;
            align-items: center;
            color: var(--primary);
            margin-bottom: 5px;
            font-size: 1rem;
        }

        .info-item h3 i {
            margin-right: 10px;
            color: var(--secondary);
        }

        .info-item p, .info-item ul {
            margin-left: 28px;
            color: var(--text-light);
        }

        .info-item ul {
            padding-left: 20px;
        }

        .info-item ul li {
            margin-bottom: 5px;
        }

        .contact-info {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 20px;
        }

        .contact-card {
            flex: 1 1 300px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 20px;
            transition: var(--transition);
        }

        .contact-card:hover {
            transform: translateY(-3px);
        }

        .contact-card h3 {
            color: var(--primary);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .contact-card h3 i {
            margin-right: 10px;
            color: var(--secondary);
        }

        .contact-card p {
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .contact-card a {
            color: var(--secondary);
            text-decoration: none;
            transition: var(--transition);
        }

        .contact-card a:hover {
            color: var(--accent);
            text-decoration: underline;
        }

        .download-btn {
            display: inline-block;
            background-color: var(--secondary);
            color: white;
            padding: 10px 20px;
            border-radius: var(--border-radius);
            text-decoration: none;
            margin-top: 20px;
            transition: var(--transition);
            font-weight: 500;
        }

        .download-btn:hover {
            background-color: var(--primary);
            transform: translateY(-2px);
        }

        .download-btn i {
            margin-right: 8px;
        }

        @media (max-width: 768px) {
            .paia-header h1 {
                font-size: 1.8rem;
            }
            
            .card-header h2 {
                font-size: 1.1rem;
            }
            
            .contact-card {
                flex: 1 1 100%;
            }
        }

        /* Animation for card opening */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .card-content.active {
            animation: fadeIn 0.3s ease-out forwards;
        }