@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap');
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 40px 20px;
        }
        
        .container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 20px;
            box-shadow: 0 25px 50px rgba(0,0,0,0.15);
            overflow: hidden;
        }
        
        .header {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            padding: 40px;
            text-align: center;
            position: relative;
        }
        
        .header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="15" cy="25" r="1.5" fill="rgba(255,255,255,0.1)"/><circle cx="85" cy="75" r="2.5" fill="rgba(255,255,255,0.1)"/><circle cx="45" cy="55" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="35" r="2" fill="rgba(255,255,255,0.1)"/><rect x="20" y="70" width="15" height="10" rx="2" fill="rgba(255,255,255,0.08)"/><rect x="60" y="20" width="20" height="8" rx="2" fill="rgba(255,255,255,0.08)"/></svg>');
        }
        
        .header h1 {
            font-size: 2.8rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        
        .header .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            position: relative;
            z-index: 1;
        }
        
        .content {
            padding: 40px;
        }
        
        .overview {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            padding: 30px;
            border-radius: 15px;
            margin-bottom: 30px;
            border-left: 5px solid #667eea;
        }
        
        .overview h2 {
            color: #2c3e50;
            font-size: 1.8rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        
        .overview h2::before {
            content: "💬";
            margin-right: 10px;
            font-size: 1.5rem;
        }
        
        .overview p {
            font-size: 1.1rem;
            color: #495057;
            line-height: 1.8;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            margin: 30px 0;
        }
        
        .stat-card {
            background: white;
            padding: 25px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 8px 25px rgba(0,0,0,0.1);
            border-top: 4px solid #667eea;
            transition: transform 0.3s ease;
        }
        
        .stat-card:hover {
            transform: translateY(-5px);
        }
        
        .stat-card .icon {
            font-size: 2.5rem;
            margin-bottom: 10px;
            display: block;
        }
        
        .stat-card h3 {
            color: #2c3e50;
            font-size: 1.1rem;
            margin-bottom: 8px;
            font-weight: 600;
        }
        
        .stat-card p {
            color: #667eea;
            font-weight: 700;
            font-size: 1.2rem;
        }
        
        .features {
            margin: 40px 0;
        }
        
        .features h2 {
            color: #2c3e50;
            font-size: 2rem;
            margin-bottom: 25px;
            text-align: center;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }
        
        .feature-item {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 25px;
            border-radius: 15px;
            position: relative;
            overflow: hidden;
        }
        
        .feature-item::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            transform: rotate(45deg);
        }
        
        .feature-item .icon {
            font-size: 3rem;
            margin-bottom: 15px;
            display: block;
            position: relative;
            z-index: 1;
        }
        
        .feature-item h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        
        .feature-item p {
            font-size: 0.95rem;
            opacity: 0.9;
            position: relative;
            z-index: 1;
        }
        
        .how-it-works {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 15px;
            margin: 30px 0;
        }
        
        .how-it-works h2 {
            color: #2c3e50;
            font-size: 1.8rem;
            margin-bottom: 25px;
            text-align: center;
        }
        
        .thread-example {
            background: white;
            border-radius: 10px;
            padding: 20px;
            margin: 20px 0;
            box-shadow: 0 4px 15px rgba(0,0,0,0.08);
        }
        
        .thread-main {
            background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 10px;
            border-left: 4px solid #2196f3;
        }
        
        .thread-reply {
            background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%);
            padding: 12px;
            border-radius: 8px;
            margin-left: 20px;
            margin-bottom: 8px;
            border-left: 4px solid #9c27b0;
            font-size: 0.9rem;
        }
        
        .thread-sub-reply {
            background: linear-gradient(135deg, #e8f5e8 0%, #c8e6c9 100%);
            padding: 10px;
            border-radius: 8px;
            margin-left: 40px;
            border-left: 4px solid #4caf50;
            font-size: 0.85rem;
        }
        
        .success-story {
            background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
            padding: 25px;
            border-radius: 15px;
            margin: 30px 0;
            border-left: 5px solid #ff9800;
        }
        
        .success-story h3 {
            color: #e65100;
            font-size: 1.4rem;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }
        
        .success-story h3::before {
            content: "🌟";
            margin-right: 10px;
        }
        
        .quote {
            font-style: italic;
            font-size: 1.1rem;
            color: #bf360c;
            margin: 15px 0;
            padding-left: 20px;
            border-left: 3px solid #ff9800;
        }
        
        .benefits {
            margin: 40px 0;
        }
        
        .benefits h2 {
            color: #2c3e50;
            font-size: 2rem;
            margin-bottom: 25px;
            text-align: center;
        }
        
        .benefits-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .benefit-card {
            background: white;
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.1);
            border-left: 4px solid #667eea;
            transition: transform 0.3s ease;
        }
        
        .benefit-card:hover {
            transform: translateY(-3px);
        }
        
        .benefit-card .icon {
            font-size: 2rem;
            margin-bottom: 10px;
            display: block;
        }
        
        .benefit-card h4 {
            color: #2c3e50;
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        
        .benefit-card p {
            color: #6c757d;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        
        .footer {
            background: #2c3e50;
            color: white;
            padding: 30px;
            text-align: center;
        }
        
        .footer h3 {
            margin-bottom: 15px;
            font-size: 1.3rem;
        }
        
        .footer p {
            opacity: 0.8;
            font-size: 0.9rem;
            margin-bottom: 5px;
        }
        
        .highlight-box {
            background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
            padding: 20px;
            border-radius: 10px;
            margin: 20px 0;
            border-left: 5px solid #28a745;
        }
        
        .highlight-box p {
            color: #155724;
            font-weight: 500;
            margin: 0;
        }
        
        @media print {
            body {
                background: white;
                padding: 0;
            }
            
            .container {
                box-shadow: none;
                max-width: none;
            }
            
            .stat-card:hover,
            .feature-item:hover,
            .benefit-card:hover {
                transform: none;
            }
        }
        
        @media (max-width: 768px) {
            .header h1 {
                font-size: 2.2rem;
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .thread-reply {
                margin-left: 10px;
            }
            
            .thread-sub-reply {
                margin-left: 20px;
            }
        }