/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066FF;
    --secondary-color: #00C9FF;
    --dark-color: #1a1a1a;
    --light-color: #ffffff;
    --gray-color: #666666;
    --bg-light: #f8f9fa;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    overflow-x: hidden;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 15px 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.logo-text:hover {
    opacity: 0.8;
}

.nav {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    color: var(--primary-color);
}

.cta-button {
    background: var(--primary-color);
    color: var(--light-color) !important;
    padding: 10px 25px;
    border-radius: 25px;
    transition: var(--transition);
}

.cta-button:hover {
    background: #0052cc;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 102, 255, 0.3);
}

/* Hero Section - 개선된 버전 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.7) 0%, rgba(0, 201, 255, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    padding: 0 20px;
}

.hero-text-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 60px 80px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    max-width: 800px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--gray-color);
    margin-bottom: 40px;
    font-weight: 400;
}

.hero-cta {
    display: inline-block;
    background: var(--primary-color);
    color: var(--light-color);
    padding: 16px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: var(--transition);
    box-shadow: 0 5px 20px rgba(0, 102, 255, 0.3);
}

.hero-cta:hover {
    background: #0052cc;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.4);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section Styles */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-color);
}

.about-subtitle-highlight {
    font-size: 23.4px;
    color: #000000 !important;
    font-weight: 600;
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 60px;
}

.about-text h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.about-text p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--gray-color);
    margin-bottom: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-box {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.feature-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.feature-box h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.feature-box p {
    font-size: 16px;
    color: var(--gray-color);
}

.about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.stat-item {
    background: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: var(--gray-color);
}

/* Features Section */
.features-list {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.feature-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.feature-card.reverse {
    direction: rtl;
}

.feature-card.reverse > * {
    direction: ltr;
}

.feature-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.feature-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.feature-image:hover img {
    transform: scale(1.05);
}

.feature-content h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.feature-content p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--gray-color);
    margin-bottom: 25px;
}

.feature-content ul {
    list-style: none;
}

.feature-content ul li {
    font-size: 16px;
    color: var(--gray-color);
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
}

.feature-content ul li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* Cases Section */
.cases {
    background: var(--bg-light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.case-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.case-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.case-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.case-card p {
    font-size: 16px;
    color: var(--gray-color);
    margin-bottom: 20px;
}

.case-card ul {
    list-style: none;
    margin-bottom: 25px;
}

.case-card ul li {
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.case-card ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.case-result {
    margin-top: 20px;
}

.result-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

/* Technology Section */
.tech-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.tech-feature {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 20px;
    transition: var(--transition);
}

.tech-feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.tech-feature h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.tech-feature p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--gray-color);
    margin-bottom: 20px;
}

.tech-feature ul {
    list-style: none;
}

.tech-feature ul li {
    font-size: 15px;
    color: var(--gray-color);
    margin-bottom: 12px;
    padding-left: 25px;
    position: relative;
}

.tech-feature ul li:before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

/* Contact Section */
.contact {
    background: var(--bg-light);
}

.poc-info {
    max-width: 900px;
    margin: 40px auto 0;
    text-align: left;
}

.poc-intro {
    font-size: 16px;
    line-height: 1.8;
    color: var(--dark-color);
    margin-bottom: 30px;
    padding: 25px 30px;
    background: rgba(0, 102, 255, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.poc-benefits {
    background: white;
    padding: 30px 35px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.poc-benefits h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.poc-benefits ul {
    list-style: none;
    padding: 0;
}

.poc-benefits ul li {
    font-size: 15px;
    color: var(--gray-color);
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
    line-height: 1.6;
}

.poc-benefits ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 18px;
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    max-width: 1000px;
    margin: 0 auto;
}

#contactForm {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

.submit-button {
    width: 100%;
    background: var(--primary-color);
    color: white;
    padding: 16px 30px;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.submit-button:hover {
    background: #0052cc;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 102, 255, 0.3);
}

.contact-info {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.contact-info h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.contact-info p {
    font-size: 16px;
    color: var(--gray-color);
    margin-bottom: 15px;
}

.contact-note {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #e0e0e0;
    font-size: 14px;
    font-style: italic;
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
}

.footer-section p {
    color: #999;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #999;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
}

.footer-logo-link {
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.footer-logo-link:hover {
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero-text-container {
        padding: 40px 30px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section {
        padding: 60px 0;
    }

    .section-header h2 {
        font-size: 32px;
    }

    .about-content,
    .feature-card,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .feature-card.reverse {
        direction: ltr;
    }

    .features-grid,
    .cases-grid,
    .stats {
        grid-template-columns: 1fr;
    }

    .tech-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.slide-up {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s ease forwards;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}