/* 푸터 */
        footer {
            padding: 100px 0 50px;
            background: #000;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            position: relative;
            overflow: hidden;
        }
        
        footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at bottom, rgba(91, 76, 255, 0.05) 0%, transparent 70%);
        }
        
        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 60px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 80px;
            position: relative;
            z-index: 2;
        }
        
        .footer-brand h3 {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(135deg, #5b4cff 0%, #00d4ff 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 25px;
            display: inline-block;
            position: relative;
        }
        
        .footer-brand h3::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 50%;
            height: 3px;
            background: linear-gradient(90deg, #5b4cff 0%, #00d4ff 100%);
            animation: underline-slide 3s ease-in-out infinite;
        }
        
        @keyframes underline-slide {
            0%, 100% { width: 50%; left: 0; }
            50% { width: 100%; left: 0; }
        }
        
        .footer-brand p {
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            font-size: 1.05rem;
        }
        
        .footer-section h4 {
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 30px;
            position: relative;
            display: inline-block;
        }
        
        .footer-section h4::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 30px;
            height: 2px;
            background: linear-gradient(90deg, #5b4cff 0%, #00d4ff 100%);
            transition: width 0.3s ease;
        }
        
        .footer-section:hover h4::after {
            width: 100%;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section ul li {
            margin-bottom: 18px;
        }
        
        .footer-section ul li a {
            color: rgba(255, 255, 255, 0.82);
            text-decoration: none;
            transition: all 0.3s ease;
            font-size: 1.05rem;
            position: relative;
            display: inline-block;
        }
        
        .footer-section ul li a::before {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 1px;
            background: linear-gradient(90deg, #5b4cff 0%, #00d4ff 100%);
            transition: width 0.3s ease;
        }
        
        .footer-section ul li a:hover {
            color: #fff;
            transform: translateX(5px);
        }
        
        .footer-section ul li a:hover::before {
            width: 100%;
        }
        
        .social-links {
            display: flex;
            gap: 18px;
            margin-top: 30px;
        }
        
        .social-link {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            text-decoration: none;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            font-size: 1.3rem;
            position: relative;
            overflow: hidden;
        }
        
        .social-link::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: linear-gradient(135deg, #5b4cff 0%, #00d4ff 100%);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: width 0.4s ease, height 0.4s ease;
            z-index: -1;
        }
        
        .social-link:hover::before {
            width: 60px;
            height: 60px;
        }
        
        .social-link:hover {
            transform: translateY(-8px) rotate(10deg);
            border-color: transparent;
            box-shadow: 0 10px 25px rgba(91, 76, 255, 0.4);
        }
        
        .footer-bottom {
            padding-top: 50px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            position: relative;
            z-index: 2;
        }
        
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.3s ease;
        }
        
        .footer-bottom a:hover {
            color: #8b80ff;
        }
        
        /* 로딩 애니메이션 */
        .loader {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #000;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10000;
            transition: opacity 0.5s ease, visibility 0.5s ease;
        }
        
        .loader.hidden {
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
        }
        
        .loader-circle {
            width: 100px;
            height: 100px;
            border: 3px solid rgba(255, 255, 255, 0.1);
            border-top-color: #5b4cff;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        
        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        /* 추가 애니메이션 효과 */
        @keyframes particle-fade {
            from {
                transform: translate(0, 0) scale(1);
                opacity: 1;
            }
            to {
                transform: translate(0, -50px) scale(0);
                opacity: 0;
            }
        }
        
        /* 모바일 메뉴 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 80px;
            left: 0;
            width: 100%;
            height: calc(100vh - 80px);
            background: rgba(0, 0, 0, 0.98);
            backdrop-filter: blur(20px);
            z-index: 999;
        }
        
        .mobile-menu.active {
            display: block;
            animation: slideDown 0.5s ease;
        }
        
        @keyframes slideDown {
            from {
                transform: translateY(-100%);
                opacity: 0;
            }
            to {
                transform: translateY(0);
                opacity: 1;
            }
        }
        
        .mobile-menu ul {
            list-style: none;
            padding: 40px;
        }
        
        .mobile-menu ul li {
            margin-bottom: 30px;
            opacity: 0;
            animation: fadeInUp 0.6s ease forwards;
        }
        
        .mobile-menu ul li:nth-child(1) { animation-delay: 0.1s; }
        .mobile-menu ul li:nth-child(2) { animation-delay: 0.2s; }
        .mobile-menu ul li:nth-child(3) { animation-delay: 0.3s; }
        .mobile-menu ul li:nth-child(4) { animation-delay: 0.4s; }
        
        .mobile-menu ul li a {
            color: #fff;
            font-size: 1.8rem;
            font-weight: 700;
            text-decoration: none;
            display: block;
            padding: 15px 0;
            position: relative;
            transition: all 0.3s ease;
        }
        
        .mobile-menu ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, #5b4cff 0%, #00d4ff 100%);
            transition: width 0.3s ease;
        }
        
        .mobile-menu ul li a:hover::after {
            width: 100%;
        }
        
        /* 플로팅 라벨 */
        .floating-label {
            position: fixed;
            background: rgba(91, 76, 255, 0.9);
            color: #fff;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            pointer-events: none;
            z-index: 9999;
            opacity: 0;
            transform: translateY(10px);
            transition: all 0.3s ease;
        }
        
        .floating-label.show {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* 스크롤 진행 표시기 */
        .scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: linear-gradient(90deg, #5b4cff 0%, #00d4ff 100%);
            z-index: 10000;
            transition: width 0.1s ease, opacity 0.35s ease;
        }

        .scroll-progress.is-complete {
            opacity: 0;
            pointer-events: none;
        }
        
        /* 태블릿 사이즈 조정 */
        @media (max-width: 1024px) {
            .section-title {
                font-size: 3.2rem;
            }
            
            .section-title-wrapper {
                gap: 20px;
            }
        }
        
        /* 데스크톱에서 배지와 제목 한 줄 정렬 */
        @media (min-width: 769px) {
            .section-title-wrapper {
                display: flex;
                flex-direction: row;
                align-items: center;
                justify-content: center;
                gap: 30px;
            }
            
            .section-badge {
                margin-bottom: 0;
            }
            
            .section-title {
                white-space: nowrap;
            }
        }
        
        /* 반응형 */
        @media (max-width: 1200px) {
            .hero-container {
                grid-template-columns: 1fr;
                gap: 60px;
                padding: 0 40px;
            }
            
            .hero-title {
                font-size: 4rem;
            }
            
            .stats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }
            
            .about-content {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .systems-carousel {
                height: 500px;
            }
            
            .system-feature-card {
                width: 280px;
                height: 380px;
                margin-left: -140px;
                margin-top: -190px;
            }
            
            .app-preview-container {
                grid-template-columns: 1fr;
                gap: 50px;
            }
            
            .footer-content {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            
            .section-title {
                font-size: 3rem;
            }
        }
        
        @media (max-width: 768px) {
            .hero-title {
                font-size: 3rem;
            }
            
            .hero-description {
                font-size: 1.1rem;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .cta-wrapper {
                flex-direction: column;
                width: 100%;
            }
            
            .hero-cta, .secondary-cta {
                width: 100%;
                justify-content: center;
            }
            
            .nav-menu {
                display: none;
            }
            
            .menu-toggle {
                display: flex;
            }
            
            .section-title {
                font-size: 2.5rem;
                white-space: normal;
            }
            
            .section-title-wrapper {
                flex-direction: column;
                gap: 10px;
            }
            
            .system-grid {
                grid-template-columns: 1fr;
            }
            
            .curriculum-tabs {
                flex-direction: column;
                align-items: center;
                width: 100%;
            }
            
            .tab-button {
                width: 100%;
                max-width: 300px;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
                text-align: center;
            }
            
            .social-links {
                justify-content: center;
            }
            
            .carousel-track {
                animation-play-state: paused;
            }
            
            .system-feature-card {
                position: static;
                margin: 0 auto 20px;
                transform: none !important;
            }
            
            .path-nodes {
                flex-direction: column;
                gap: 40px;
            }
            
            .path-line {
                display: none;
            }
            
            .persona-grid {
                grid-template-columns: 1fr;
                gap: 25px;
            }
            
            .dashboard-content {
                grid-template-columns: 1fr;
            }
            
            .dashboard-sidebar {
                display: none;
            }
            
            .dashboard-main {
                grid-template-columns: 1fr;
            }
        }
        /* Touch Animation Styles */
        .touchable {
            position: relative;
            cursor: pointer;
            transition: transform 0.2s ease;
        }
        
        .touchable::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(91, 76, 255, 0.3);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: width 0.6s ease, height 0.6s ease, opacity 0.6s ease;
            opacity: 0;
            pointer-events: none;
        }
        
        .touchable.touching::before {
            width: 200%;
            height: 200%;
            opacity: 0;
        }
        
        .touchable:active {
            transform: scale(0.95);
        }
        
        /* Ripple effect */
        @keyframes ripple {
            0% {
                transform: translate(-50%, -50%) scale(0);
                opacity: 1;
            }
            100% {
                transform: translate(-50%, -50%) scale(4);
                opacity: 0;
            }
        }
        
        .ripple {
            position: absolute;
            border-radius: 50%;
            background: rgba(91, 76, 255, 0.4);
            transform: translate(-50%, -50%) scale(0);
            animation: ripple 0.6s ease-out;
            pointer-events: none;
        }
        
        /* Audio playing indicator */
        .audio-playing {
            position: relative;
            overflow: visible;
        }
        
        .audio-playing::after {
            content: '🔊';
            position: absolute;
            top: -10px;
            right: -10px;
            font-size: 20px;
            opacity: 1;
        }
        
        /* Hide speaker icon in hero section for all elements */
        .hero .audio-playing::after,
        .hero * .audio-playing::after {
            display: none !important;
        }
        
        /* Hide audio element completely */
        audio {
            display: none !important;
            visibility: hidden !important;
            width: 0 !important;
            height: 0 !important;
            position: absolute !important;
            left: -9999px !important;
        }

        /* 블로그/플레이스 한 줄 라벨 */
        .footer-section ul li .footer-inline-label {
            color: rgba(255, 255, 255, 0.78);
            font-weight: 700;
            margin-right: 2px;
        }
        body.light-mode .footer-section ul li .footer-inline-label {
            color: #333 !important;
        }

        /* 스플(스마트플레이스 사업주) 유틸 링크 — 회색조로 약하게 (강조색 제거) */
        .footer-section ul li.footer-biz a {
            color: rgba(255, 255, 255, 0.42);
            font-size: 0.95rem;
        }
        .footer-section ul li.footer-biz a:hover {
            color: rgba(255, 255, 255, 0.72);
        }
        .footer-section ul li.footer-biz a::before {
            background: rgba(255, 255, 255, 0.4);
        }
        body.light-mode .footer-section ul li.footer-biz a {
            color: #8a8f98 !important;
        }
        body.light-mode .footer-section ul li.footer-biz a:hover {
            color: #5a5f68 !important;
        }