/* 웹폰트 최적화 - 시스템 폰트 사용 (더 빠른 로딩) */
@font-face {
    font-family: 'Noto Sans KR';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('https://fonts.gstatic.com/s/notosanskr/v12/PltxooEPQMYFoRQSYq-QW6lpQkcggM05_TBjjTSkDQc1KxC2Y93P3pDAA.0.woff2') format('woff2');
    unicode-range: U+AC00-D7AF;
}

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

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: #333;
}

        nav {
            background: #1a1a1a;
            color: white;
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }

        nav .container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 20px;
        }

        nav .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: #ff6b35;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }

        nav a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
            font-weight: 500;
            white-space: nowrap;
        }

        nav a:hover {
            color: #ff6b35;
        }

        .hero {
            background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
            color: white;
            padding: 150px 20px 100px;
            text-align: center;
            margin-top: 70px;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .hero .subtitle {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            opacity: 0.95;
        }

        .hero .tagline {
            font-size: 1.2rem;
            margin-bottom: 2.5rem;
            color: #ff6b35;
            font-weight: 600;
        }

        .btn {
            display: inline-block;
            padding: 15px 40px;
            background: #ff6b35;
            color: white;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            font-size: 1.1rem;
            transition: all 0.3s;
            border: 2px solid #ff6b35;
        }

        .btn:hover {
            background: transparent;
            transform: translateY(-2px);
            box-shadow: 0 5px 20px rgba(255,107,53,0.4);
        }

        .categories {
            padding: 80px 20px;
            background: #f5f5f5;
        }

        .categories h2 {
            text-align: center;
            font-size: 2.8rem;
            margin-bottom: 1rem;
            color: #2c3e50;
        }

        .categories .subtitle {
            text-align: center;
            font-size: 1.2rem;
            color: #666;
            margin-bottom: 4rem;
        }

        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .category-card {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            text-align: center;
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transition: all 0.3s;
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 5px;
            background: linear-gradient(90deg, #ff6b35, #ff8c5a);
            transform: scaleX(0);
            transition: transform 0.3s;
        }

        .category-card:hover::before {
            transform: scaleX(1);
        }

        .category-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 30px rgba(255,107,53,0.2);
        }

        .category-card.featured {
            border: 3px solid #ff6b35;
        }

        .featured-badge {
            position: absolute;
            top: 15px;
            right: -35px;
            background: #ff6b35;
            color: white;
            padding: 5px 50px;
            transform: rotate(45deg);
            font-size: 0.85rem;
            font-weight: bold;
        }

        .category-image {
            width: 280px;
            height: 280px;
            object-fit: contain;
            margin: 0 auto 1.5rem;
            display: block;
        }

        .category-card h3 {
            font-size: 1.6rem;
            margin-bottom: 1rem;
            color: #2c3e50;
        }

        .category-card p {
            color: #666;
            line-height: 1.6;
            margin-bottom: 1.5rem;
        }

        .category-specs {
            font-size: 0.9rem;
            color: #999;
            margin-top: 1rem;
        }

        /* About Section */
        .about {
            padding: 100px 20px;
            background: linear-gradient(135deg, #1a1a1a 0%, #2c3e50 100%);
            color: white;
            position: relative;
            overflow: hidden;
        }

        .about::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255,107,53,0.15) 0%, transparent 70%);
            border-radius: 50%;
        }

        .about-container {
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .about-header {
            text-align: center;
            margin-bottom: 4rem;
        }

        .about-badge {
            display: inline-block;
            padding: 8px 20px;
            background: rgba(255,107,53,0.2);
            border: 1px solid rgba(255,107,53,0.5);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: #ff6b35;
            letter-spacing: 1px;
            margin-bottom: 1.5rem;
        }

        .about h2 {
            font-size: 3rem;
            margin-bottom: 1rem;
            font-weight: 700;
            letter-spacing: -1px;
        }

        .about-subtitle {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.8);
            max-width: 850px;
            margin: 0 auto;
            line-height: 1.8;
        }

        .about-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            margin: 4rem 0;
            padding: 3rem;
            background: rgba(255,255,255,0.05);
            border-radius: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.1);
        }

        .stat-item {
            text-align: center;
            padding: 1rem;
        }

        .stat-value {
            font-size: 3rem;
            font-weight: 700;
            color: #ff6b35;
            margin-bottom: 0.5rem;
            font-family: 'JetBrains Mono', monospace;
        }

        .stat-label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            letter-spacing: 0.5px;
        }

        .about-strengths {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 3rem;
        }

        .strength-card {
            background: rgba(255,255,255,0.08);
            padding: 2rem;
            border-radius: 15px;
            border: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
        }

        .strength-card:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,107,53,0.5);
            transform: translateY(-5px);
        }

        .strength-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .strength-card h3 {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            color: white;
        }

        .strength-card p {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
        }

        .pricing {
            padding: 80px 20px;
            background: white;
        }

        .pricing h2 {
            text-align: center;
            font-size: 2.8rem;
            margin-bottom: 3rem;
            color: #2c3e50;
        }

        .price-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            max-width: 1000px;
            margin: 0 auto;
        }

        .price-card {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            border: 2px solid #e9ecef;
            transition: all 0.3s;
        }

        .price-card:hover {
            border-color: #ff6b35;
            transform: scale(1.05);
        }

        .price-card.popular {
            background: linear-gradient(135deg, #ff6b35 0%, #ff8c5a 100%);
            color: white;
            border: none;
        }

        .price-card h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }

        .price-card .price {
            font-size: 2.5rem;
            font-weight: bold;
            margin: 1rem 0;
        }

        .price-card .quantity {
            font-size: 1.2rem;
            opacity: 0.8;
        }

        .features {
            padding: 80px 20px;
            background: #f5f5f5;
        }

        .features h2 {
            text-align: center;
            font-size: 2.8rem;
            margin-bottom: 3rem;
            color: #2c3e50;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

        .feature-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 3px 15px rgba(0,0,0,0.1);
        }

        .feature-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: #2c3e50;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .feature-icon {
            color: #ff6b35;
        }

        .contact {
            padding: 80px 20px;
            background: #2c3e50;
            color: white;
            text-align: center;
        }

        .contact h2 {
            font-size: 2.8rem;
            margin-bottom: 2rem;
        }

        .contact-info {
            font-size: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .contact-phone {
            font-size: 2.5rem;
            color: #ff6b35;
            font-weight: bold;
            margin: 1.5rem 0;
        }

        footer {
            background: #1a1a1a;
            color: white;
            text-align: center;
            padding: 2rem 0;
        }

        @media (max-width: 768px) {
            nav .container {
                flex-wrap: wrap;
                gap: 0.5rem;
            }

            nav .logo {
                font-size: 1.3rem;
            }

            nav ul {
                gap: 0.5rem;
                font-size: 0.75rem;
                flex-wrap: wrap;
                justify-content: center;
                width: 100%;
            }

            nav li {
                white-space: nowrap;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .hero .subtitle {
                font-size: 1.1rem;
            }

            .categories h2,
            .pricing h2,
            .features h2,
            .contact h2 {
                font-size: 2rem;
            }

            .category-grid,
            .price-grid,
            .features-grid {
                grid-template-columns: 1fr;
            }
        }