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

:root {
    --primary-color: #2196F3;
    --secondary-color: #64B5F6;
    --accent-color: #42A5F5;
    --dark-bg: #1565C0;
    --light-bg: #E3F2FD;
    --lighter-bg: #F5FBFF;
    --text-dark: #1a1a1a;
    --text-light: #546e7a;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #2196F3 0%, #64B5F6 100%);
    --gradient-2: linear-gradient(135deg, #1976D2 0%, #42A5F5 100%);
    --gradient-3: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
    --shadow-sm: 0 2px 8px rgba(33, 150, 243, 0.1);
    --shadow-md: 0 4px 16px rgba(33, 150, 243, 0.15);
    --shadow-lg: 0 8px 32px rgba(33, 150, 243, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans KR', 'Roboto', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

section {
    padding: 100px 0;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 22px;
    width: auto;
    transition: transform 0.3s ease;
}

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

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 2px;
}

.logo .highlight {
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-item {
    position: relative;
}

.has-dropdown > .nav-link i {
    display: none; /* 화살표 숨김 */
    font-size: 10px;
    margin-left: 5px;
    transition: transform 0.3s ease;
}

.has-dropdown:hover > .nav-link i {
    transform: rotate(180deg);
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-link:hover::after {
    width: 100%;
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 200px;
    list-style: none;
    padding: 15px 0;
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: 15px;
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: 12px 25px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.dropdown-link:hover {
    background: var(--light-bg);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    padding-left: 30px;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

/* Language Switch */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 20px;
}

.lang-btn {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    background: var(--light-bg);
    color: var(--primary-color);
}

.lang-btn.active {
    background: var(--primary-color);
    color: var(--white);
}

.lang-divider {
    color: #ddd;
    font-size: 14px;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-2);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(33, 150, 243, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(100, 181, 246, 0.15) 0%, transparent 50%);
    animation: heroAnimation 15s ease-in-out infinite;
}

@keyframes heroAnimation {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.85) 0%, rgba(100, 181, 246, 0.75) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    max-width: 800px;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s both;
}

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

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--white);
    font-size: 24px;
    animation: bounce 2s infinite;
    cursor: pointer;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient-1);
    color: var(--white);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(33, 150, 243, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
}

/* ===================================
   Section Headers
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.section-description {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
}

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

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.about-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(33, 150, 243, 0.1);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.about-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: var(--white);
}

.about-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.about-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.6;
}

.company-info {
    margin-top: 40px;
}

.info-box {
    background: var(--gradient-1);
    color: var(--white);
    padding: 40px;
    border-radius: 15px;
    text-align: center;
}

.info-box h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.info-box h3 i {
    color: var(--white);
    margin-right: 10px;
}

.info-box p {
    font-size: 16px;
    margin-bottom: 10px;
}

.info-box .detail {
    font-size: 14px;
    opacity: 0.8;
}

/* ===================================
   Vision Section
   =================================== */
.vision-section {
    background: var(--light-bg);
}

.vision-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.vision-card {
    background: var(--white);
    padding: 50px 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid rgba(33, 150, 243, 0.1);
}

.vision-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.vision-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 25px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
    color: var(--white);
}

.vision-card h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 600;
}

.vision-card h4 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.vision-card p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

.core-values {
    background: var(--gradient-1);
    padding: 60px 50px;
    border-radius: 15px;
    text-align: center;
    color: var(--white);
}

.core-values h3 {
    font-size: 32px;
    margin-bottom: 40px;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.value-item {
    padding: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.value-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.value-item i {
    font-size: 50px;
    color: var(--white);
    margin-bottom: 20px;
}

.value-item h4 {
    font-size: 20px;
    margin-bottom: 15px;
    line-height: 1.4;
}

.value-item p {
    font-size: 15px;
    opacity: 0.9;
    line-height: 1.6;
}

/* ===================================
   History Section (회사연혁)
   =================================== */
.history-section {
    background: var(--white);
    padding: 80px 0;
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto 60px;
    padding: 40px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: var(--gradient-1);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 50px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-year {
    width: 150px;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    text-align: center;
}

.timeline-content {
    flex: 1;
    background: var(--light-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: all 0.3s ease;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: 50px;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: 50px;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border: 4px solid var(--white);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--primary-color);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    left: -60px;
}

.timeline-item:nth-child(even) .timeline-content::before {
    right: -60px;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    font-size: 22px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.timeline-content p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 8px;
}

.timeline-date {
    display: inline-block;
    margin-top: 10px;
    padding: 5px 15px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.history-vision-box {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 50px;
    background: var(--gradient-1);
    border-radius: 20px;
    color: var(--white);
    position: relative;
}

.history-vision-box i {
    font-size: 40px;
    opacity: 0.3;
    margin-bottom: 20px;
}

.history-vision-box h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.history-vision-box p {
    font-size: 16px;
    line-height: 1.8;
    opacity: 0.95;
}

/* ===================================
   CI Section
   =================================== */
.ci-section {
    background: var(--lighter-bg);
    padding: 80px 0;
}

.ci-content {
    max-width: 1000px;
    margin: 0 auto;
}

.ci-logo-box {
    background: var(--white);
    padding: 60px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    margin-bottom: 50px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.ci-logo-display {
    text-align: center;
    padding: 50px;
    background: var(--light-bg);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ci-main-logo {
    max-width: 150px;
    width: 100%;
    height: auto;
}

.ci-logo {
    font-size: 64px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 4px;
}

.ci-logo .highlight {
    color: var(--primary-color);
}

.ci-description h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.ci-description p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 15px;
}

.ci-description strong {
    color: var(--primary-color);
    font-weight: 600;
}

.ci-colors {
    background: var(--white);
    padding: 50px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    margin-bottom: 50px;
}

.ci-colors h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.color-palette {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.color-item {
    text-align: center;
}

.color-box {
    width: 100%;
    height: 150px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
}

.color-box:hover {
    transform: scale(1.05);
}

.color-info h4 {
    font-size: 18px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.color-info p {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 8px;
}

.color-info span {
    font-size: 14px;
    color: var(--text-light);
}

.ci-guidelines {
    background: var(--white);
    padding: 50px;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.ci-guidelines h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

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

.guideline-item {
    text-align: center;
    padding: 30px;
    background: var(--light-bg);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.guideline-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-sm);
}

.guideline-item i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.guideline-item h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.guideline-item p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ===================================
   Location Section (오시는길)
   =================================== */
.location-section {
    background: var(--white);
    padding: 80px 0;
}

.location-tabs {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.location-tab {
    padding: 15px 40px;
    background: var(--light-bg);
    border: 2px solid transparent;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.location-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.location-tab.active {
    background: var(--gradient-1);
    color: var(--white);
    border-color: var(--primary-color);
}

.location-info-wrapper {
    position: relative;
}

.location-info {
    display: none;
    animation: fadeIn 0.5s ease;
}

.location-info.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.location-content {
    background: var(--light-bg);
    padding: 50px;
    border-radius: 20px;
}

.location-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.location-address-box {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-sm);
}

.location-address-box h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.location-address-box h3 i {
    color: var(--primary-color);
}

.location-address-box .address {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 5px;
}

.location-address-box .sub-address {
    font-size: 14px;
    color: var(--text-light);
}

.location-contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-info-item {
    background: var(--white);
    padding: 20px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-sm);
}

.contact-info-item i {
    font-size: 28px;
    color: var(--primary-color);
}

.contact-info-item h4 {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 5px;
}

.contact-info-item p {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
}

.transportation {
    background: var(--white);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
}

.transportation h4 {
    font-size: 18px;
    margin-bottom: 15px;
    margin-top: 20px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.transportation h4:first-child {
    margin-top: 0;
}

.transportation h4 i {
    color: var(--primary-color);
}

.transportation ul {
    list-style: none;
    padding-left: 0;
}

.transportation li {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
}

.transportation li::before {
    content: '•';
    position: absolute;
    left: 5px;
    color: var(--primary-color);
    font-weight: bold;
}

.transportation strong {
    color: var(--text-dark);
}

.location-map {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* ===================================
   Business Section
   =================================== */
.business-section {
    background: var(--white);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.business-card {
    background: var(--white);
    padding: 50px 35px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid rgba(33, 150, 243, 0.15);
}

.business-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    background: var(--light-bg);
}

.business-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 25px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--white);
}

.business-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.business-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

/* ===================================
   Technology Section
   =================================== */
.technology-section {
    background: var(--gradient-1);
    color: var(--white);
}

.technology-section .section-title,
.technology-section .section-tag {
    color: var(--white);
}

.technology-section .section-description {
    color: rgba(255, 255, 255, 0.8);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 4개 고정 */
    gap: 30px;
}

.tech-card {
    background: rgba(255, 255, 255, 0.15);
    padding: 40px 30px;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.tech-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
    border-color: var(--white);
}

.tech-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 20px;
    opacity: 0.7;
}

.tech-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--white);
}

.tech-card p {
    font-size: 15px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 25px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 16px;
    margin-bottom: 5px;
    color: var(--text-dark);
}

.contact-details p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.contact-form-wrapper {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid rgba(33, 150, 243, 0.2);
    border-radius: 8px;
    font-size: 15px;
    font-family: 'Noto Sans KR', sans-serif;
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
}

.contact-form button {
    width: 100%;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

/* ===================================
   Support Section (고객센터)
   =================================== */
.support-section {
    background: var(--lighter-bg);
    padding: 80px 0;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.support-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid rgba(33, 150, 243, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.support-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.support-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
    color: var(--white);
    margin-bottom: 25px;
}

.support-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.support-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 20px;
    flex-grow: 1;
}

.support-contact {
    width: 100%;
    padding-top: 20px;
    border-top: 1px solid rgba(33, 150, 243, 0.1);
}

.support-contact p {
    font-size: 14px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.support-contact i {
    color: var(--primary-color);
    margin-right: 8px;
}

.support-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
}

.support-link:hover {
    gap: 12px;
    color: var(--accent-color);
}

.support-link i {
    transition: transform 0.3s ease;
}

.support-link:hover i {
    transform: translateX(5px);
}

.support-info-box {
    background: var(--gradient-1);
    padding: 40px;
    border-radius: 15px;
    color: var(--white);
}

.support-info-content {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.support-info-content > i {
    font-size: 40px;
    flex-shrink: 0;
    opacity: 0.9;
}

.support-info-content h4 {
    font-size: 22px;
    margin-bottom: 10px;
}

.support-info-content p {
    font-size: 15px;
    line-height: 1.7;
    opacity: 0.95;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--gradient-2);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo {
    height: auto; /* 원본 비율 유지 */
    width: 180px; /* 120px → 180px (50% 증가) */
    margin-bottom: 15px;
    filter: brightness(0) invert(1); /* 흰색으로 변경 */
}

.footer-left h3 {
    font-size: 28px;
    margin-bottom: 15px;
}

.footer-left .highlight {
    color: var(--white);
}

.footer-left p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

.footer-tagline {
    color: var(--white) !important;
    font-weight: 500;
    opacity: 0.9;
}

.footer-middle h4,
.footer-right h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--white);
}

.footer-middle p,
.footer-right p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    margin-bottom: 10px;
}

.footer-right i {
    margin-right: 10px;
    color: var(--white);
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ===================================
   Back to Top Button
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 30px 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        padding: 15px 20px;
        justify-content: center;
    }

    /* Mobile Dropdown */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        margin-top: 0;
        background: var(--light-bg);
    }

    .has-dropdown.active .dropdown-menu {
        max-height: 300px;
    }

    .dropdown-link {
        padding: 10px 40px;
    }

    .hamburger {
        display: flex;
    }
    
    .lang-switch {
        margin-left: auto;
        margin-right: 15px;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    .hero-title {
        font-size: 40px;
    }

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

    .section-title {
        font-size: 32px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .support-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr); /* 태블릿: 2개씩 */
    }

    .support-info-content {
        flex-direction: column;
        text-align: center;
    }

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

    /* Timeline responsive */
    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
    }

    .timeline-year {
        width: 80px;
        font-size: 24px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 40px;
        margin-right: 0;
    }

    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        left: -50px;
        right: auto;
    }

    /* CI responsive */
    .ci-logo-box {
        grid-template-columns: 1fr;
        padding: 40px;
    }

    .ci-logo {
        font-size: 48px;
    }

    /* Location responsive */
    .location-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .section-title {
        font-size: 28px;
    }

    .about-grid,
    .business-grid,
    .tech-grid,
    .support-grid {
        grid-template-columns: 1fr;
    }

    .location-content {
        padding: 30px;
    }

    .location-tabs {
        flex-direction: column;
    }

    .location-tab {
        width: 100%;
    }

    .history-vision-box {
        padding: 30px;
    }

    .ci-colors,
    .ci-guidelines {
        padding: 30px;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 28px;
    }

    .logo h1 {
        font-size: 24px;
    }

    .section-title {
        font-size: 24px;
    }

    .contact-form-wrapper {
        padding: 25px;
    }
}