/* style.css */
       * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero .subtitle {
            font-size: 1.5rem;
            margin-bottom: 15px;
            opacity: 0.9;
        }
        
        .hero .tagline {
            font-size: 1.2rem;
            margin-bottom: 40px;
            opacity: 0.8;
        }
        
        .cta-button {
            display: inline-block;
            background: #ff6b6b;
            color: white;
            padding: 18px 40px;
            font-size: 1.2rem;
            font-weight: 600;
            text-decoration: none;
            border-radius: 50px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        }
        
        .cta-button:hover {
            background: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 107, 107, 0.4);
        }
        
        /* Key Benefits Section */
        .benefits {
            padding: 80px 0;
            background: #f8f9fa;
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: #2c3e50;
        }
        
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);  /* 4개 열로 고정 */
            gap: 30px;
        }

        /* 반응형 추가 */
        @media (max-width: 1200px) {
            .benefits-grid {
                grid-template-columns: repeat(2, 1fr);  /* 태블릿: 2x2 */
            }
        }

        @media (max-width: 768px) {
            .benefits-grid {
                grid-template-columns: 1fr;  /* 모바일: 1x4 세로 */
            }
        }
        
        .benefit-card {
            background: white;
            padding: 40px;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
        }
        
        .benefit-card:hover {
            transform: translateY(-5px);
        }
        
        .benefit-icon {
            font-size: 3rem;
            margin-bottom: 20px;
        }
        
        .benefit-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        .benefit-card p {
            font-size: 1.1rem;
            color: #666;
            line-height: 1.6;
        }
        
        /* Scenarios Section */
        .scenarios {
            padding: 80px 0;
            background: white;
        }
        
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 40px;
            margin-top: 40px;
        }
        
        .scenario-card {
            background: #f8f9fa;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
        }
        
        .scenario-header {
            background: #667eea;
            color: white;
            padding: 20px;
            font-weight: 600;
        }
        
        .scenario-content {
            padding: 30px;
        }
        
        .chat-message {
            margin-bottom: 20px;
        }
        
        .user-message {
            background: #e3f2fd;
            padding: 15px;
            border-radius: 10px;
            border-left: 4px solid #2196f3;
        }
        
        .ai-message {
            background: #f3e5f5;
            padding: 15px;
            border-radius: 10px;
            border-left: 4px solid #9c27b0;
        }
        
        .message-label {
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 5px;
            opacity: 0.8;
        }
        
        /* Why Now Section  */
        .why-now {
            padding: 80px 0;
            background: #f8f9fa;  /* 변경: 그라데이션 → 회색 */
            color: #2c3e50;       /* 변경: 화이트 → 다크 */
        }

        .why-item {
            background: white;          /* 추가: 카드 배경 */
            padding: 30px;             /* 추가: 카드 패딩 */
            border-radius: 15px;       /* 추가: 카드 모서리 */
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);  /* 추가: 그림자 */
            transition: transform 0.3s ease;          /* 추가: 호버 효과 */
            text-align: center;
        }

        .why-item:hover {             /* 추가: 호버 효과 */
            transform: translateY(-5px);
        }

        .why-item h3 {
            font-size: 1.3rem;        /* 변경: 1.5rem → 1.3rem */
            margin-bottom: 15px;
            color: #2c3e50;           /* 추가: 제목 색상 */
        }

        .why-item p {
            color: #666;              /* 변경: opacity 0.9 → #666 */
            line-height: 1.6;
        }

            .why-now-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);  /* 3열 고정 */
        gap: 30px;
        margin-top: 40px;
        }       
        
        /* CTA Section */
        .final-cta {
            padding: 80px 0;
            background: #2c3e50;
            color: white;
            text-align: center;
        }
        
        .final-cta h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .final-cta p {
            font-size: 1.3rem;
            margin-bottom: 40px;
            opacity: 0.9;
        }
        
        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .cta-secondary {
            background: transparent;
            border: 2px solid white;
            color: white;
        }
        
        .cta-secondary:hover {
            background: white;
            color: #2c3e50;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero .subtitle {
                font-size: 1.2rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
        }