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

:root {
    --primary-color: #003d82;
    --secondary-color: #0056b3;
    --accent-color: #007bff;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --bg-light: #f5f5f5;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
    font-weight: 400;
}

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

/* 헤더 및 네비게이션 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: transparent;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    background: var(--bg-white);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header:has(.nav-item:hover) {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.header.scrolled:has(.nav-item:hover) {
    background: rgba(255, 255, 255, 0.98);
}

.navbar {
    padding: 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.nav-brand a {
    display: flex;
    align-items: center;
    text-decoration: none;
    filter: brightness(0) invert(1);
    transition: filter 0.3s ease;
}

.header.scrolled .nav-brand a,
.header:has(.nav-item:hover) .nav-brand a {
    filter: none;
}

.logo {
    height: 45px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
    height: 100%;
}

.nav-item {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: white;
    font-weight: 500;
    font-size: 15px;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    position: relative;
    border-radius: 4px;
}

.header.scrolled .nav-link,
.header:has(.nav-item:hover) .nav-link {
    color: var(--text-dark);
}

.nav-item:hover .submenu {
    display: block;
}

.nav-item:hover .nav-link {
    color: var(--text-dark);
}

.submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-hover);
    min-width: 180px;
    padding: 10px 0;
    list-style: none;
    z-index: 100;
    border-radius: 4px;
    margin-top: 0;
}

.submenu li {
    padding: 0;
}

.submenu a {
    display: block;
    padding: 10px 20px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.3s ease;
}

.submenu a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: white;
    transition: all 0.3s ease;
}

.header.scrolled .nav-toggle span,
.header:has(.nav-item:hover) .nav-toggle span {
    background: var(--text-dark);
}

/* 언어 선택 버튼 */
.lang-selector {
    display: flex;
    gap: 10px;
    margin-left: 20px;
}

.lang-btn {
    padding: 6px 16px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    color: white;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.header.scrolled .lang-btn,
.header:has(.nav-item:hover) .lang-btn {
    border-color: var(--border-color);
    color: var(--text-dark);
}

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

.header.scrolled .lang-btn.active,
.header:has(.nav-item:hover) .lang-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.header.scrolled .lang-btn:hover,
.header:has(.nav-item:hover) .lang-btn:hover {
    background: rgba(0, 61, 130, 0.1);
}

/* 메인 비주얼 */
.main-visual {
    position: relative;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
}

.slider-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.slider-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    z-index: 1;
}

.slider-slide.active {
    opacity: 1;
    z-index: 2;
}

.slider-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 61, 130, 0.6) 0%, rgba(0, 86, 179, 0.6) 100%);
    z-index: 1;
}

.visual-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: white;
    z-index: 3;
    width: 100%;
    padding: 0 20px;
}

.visual-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    display: block;
    width: 100%;
}

.visual-title.animate-text {
    position: relative;
    animation: breathe 3s ease-in-out infinite;
    display: block;
}

@keyframes breathe {
    0%, 100% {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
    50% {
        transform: scale(1.02) translateY(-3px);
        opacity: 0.95;
    }
}

.visual-title.animate-text::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.3) 50%, 
        transparent 100%);
    animation: shimmer 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 메인 비주얼 텍스트를 위한 대체 애니메이션 효과 옵션들 */

/* 옵션 1: Glow 효과 (빛나는 효과) - shimmer 대신 사용 */
.visual-title.animate-glow::before {
    display: none;
}

.visual-title.animate-glow {
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.6),
                 0 0 30px rgba(255, 255, 255, 0.4),
                 0 0 45px rgba(255, 255, 255, 0.2);
    animation: breathe 3s ease-in-out infinite, title-glow-pulse 2.5s ease-in-out infinite;
}

@keyframes title-glow-pulse {
    0%, 100% {
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.6),
                     0 0 30px rgba(255, 255, 255, 0.4),
                     0 0 45px rgba(255, 255, 255, 0.2);
    }
    50% {
        text-shadow: 0 0 25px rgba(255, 255, 255, 0.9),
                     0 0 40px rgba(255, 255, 255, 0.6),
                     0 0 60px rgba(255, 255, 255, 0.3);
    }
}

/* 옵션 2: Gradient 텍스트 애니메이션 (그라데이션이 흐르는 효과) */
.visual-title.animate-gradient::before {
    display: none;
}

.visual-title.animate-gradient {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(255, 255, 255, 1) 25%,
        rgba(255, 255, 255, 0.9) 50%,
        rgba(255, 255, 255, 1) 75%,
        rgba(255, 255, 255, 0.9) 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: breathe 3s ease-in-out infinite, gradient-flow 3s ease-in-out infinite;
}

@keyframes gradient-flow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 옵션 3: Fade pulse 효과 (부드러운 펄스) */
.visual-title.animate-fade-pulse::before {
    display: none;
}

.visual-title.animate-fade-pulse {
    animation: breathe 3s ease-in-out infinite, fade-pulse 2.5s ease-in-out infinite;
}

@keyframes fade-pulse {
    0%, 100% {
        opacity: 0.9;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.03);
    }
}

/* 옵션 4: Slide up 효과 (아래에서 위로 슬라이드) */
.visual-title.animate-slide-up::before {
    display: none;
}

.visual-title.animate-slide-up {
    animation: breathe 3s ease-in-out infinite, slide-up 3s ease-in-out infinite;
}

@keyframes slide-up {
    0%, 100% {
        transform: translateY(0) scale(1);
        opacity: 0.95;
    }
    50% {
        transform: translateY(-8px) scale(1.02);
        opacity: 1;
    }
}

/* 옵션 5: Wave 효과 (물결처럼 흔들림) */
.visual-title.animate-wave::before {
    display: none;
}

.visual-title.animate-wave {
    animation: breathe 3s ease-in-out infinite, wave 2.5s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% {
        transform: translateY(0) rotate(0deg) scale(1);
    }
    25% {
        transform: translateY(-4px) rotate(0.8deg) scale(1.01);
    }
    75% {
        transform: translateY(4px) rotate(-0.8deg) scale(1.01);
    }
}

/* 옵션 6: Typing 효과 (타이핑처럼 나타나는 효과) - 초기 로드 시만 */
.visual-title.animate-typing::before {
    display: none;
}

.visual-title.animate-typing {
    overflow: hidden;
    border-right: 3px solid rgba(255, 255, 255, 0.8);
    white-space: nowrap;
    animation: typing 3s steps(20, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink-caret {
    from, to {
        border-color: transparent;
    }
    50% {
        border-color: rgba(255, 255, 255, 0.8);
    }
}

/* 옵션 7: Neon 효과 (네온사인처럼 빛나는 효과) */
.visual-title.animate-neon::before {
    display: none;
}

.visual-title.animate-neon {
    text-shadow: 
        0 0 10px rgba(255, 255, 255, 0.8),
        0 0 20px rgba(255, 255, 255, 0.6),
        0 0 30px rgba(255, 255, 255, 0.4),
        0 0 40px rgba(255, 255, 255, 0.2);
    animation: breathe 3s ease-in-out infinite, neon-flicker 2s ease-in-out infinite;
}

@keyframes neon-flicker {
    0%, 100% {
        text-shadow: 
            0 0 10px rgba(255, 255, 255, 0.8),
            0 0 20px rgba(255, 255, 255, 0.6),
            0 0 30px rgba(255, 255, 255, 0.4),
            0 0 40px rgba(255, 255, 255, 0.2);
    }
    50% {
        text-shadow: 
            0 0 5px rgba(255, 255, 255, 0.5),
            0 0 10px rgba(255, 255, 255, 0.3),
            0 0 15px rgba(255, 255, 255, 0.2),
            0 0 20px rgba(255, 255, 255, 0.1);
    }
}

.visual-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    line-height: 1.8;
    margin-top: 30px;
    margin-bottom: 40px;
    opacity: 0.95;
    display: block;
    width: 100%;
}

.visual-subtitle.animate-text {
    position: relative;
    animation: breathe 3.5s ease-in-out infinite;
    display: block;
    animation-delay: 0.3s;
}

/* shimmer 효과는 glow 효과로 대체됨 */
.visual-subtitle.animate-text::before {
    display: none;
}

/* 영문 subtitle을 위한 대체 애니메이션 효과 옵션들 */
/* 옵션 1: Glow 효과 (빛나는 효과) - breathe 애니메이션과 함께 사용 */
.visual-subtitle.animate-glow {
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5),
                 0 0 20px rgba(255, 255, 255, 0.3),
                 0 0 30px rgba(255, 255, 255, 0.2);
    animation: breathe 3.5s ease-in-out infinite, glow-pulse 2s ease-in-out infinite;
    animation-delay: 0.3s, 0s;
}

@keyframes glow-pulse {
    0%, 100% {
        text-shadow: 0 0 10px rgba(255, 255, 255, 0.5),
                     0 0 20px rgba(255, 255, 255, 0.3),
                     0 0 30px rgba(255, 255, 255, 0.2);
    }
    50% {
        text-shadow: 0 0 20px rgba(255, 255, 255, 0.8),
                     0 0 30px rgba(255, 255, 255, 0.5),
                     0 0 40px rgba(255, 255, 255, 0.3);
    }
}

/* 옵션 2: Gradient 텍스트 애니메이션 (그라데이션이 흐르는 효과) */
.visual-subtitle.animate-gradient {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.9) 0%, 
        rgba(255, 255, 255, 1) 25%,
        rgba(255, 255, 255, 0.9) 50%,
        rgba(255, 255, 255, 1) 75%,
        rgba(255, 255, 255, 0.9) 100%);
    background-size: 200% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-flow 3s ease-in-out infinite;
}

@keyframes gradient-flow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* 옵션 3: Fade pulse 효과 (부드러운 펄스) */
.visual-subtitle.animate-fade-pulse {
    animation: fade-pulse 2.5s ease-in-out infinite;
}

@keyframes fade-pulse {
    0%, 100% {
        opacity: 0.85;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.02);
    }
}

/* 옵션 4: Slide up 효과 (아래에서 위로 슬라이드) */
.visual-subtitle.animate-slide-up {
    animation: slide-up 3s ease-in-out infinite;
}

@keyframes slide-up {
    0%, 100% {
        transform: translateY(0);
        opacity: 0.9;
    }
    50% {
        transform: translateY(-5px);
        opacity: 1;
    }
}

/* 옵션 5: Wave 효과 (물결처럼 흔들림) */
.visual-subtitle.animate-wave {
    animation: wave 2s ease-in-out infinite;
}

@keyframes wave {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-3px) rotate(0.5deg);
    }
    75% {
        transform: translateY(3px) rotate(-0.5deg);
    }
}

.btn {
    display: inline-block;
    padding: 14px 40px;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 15px;
}

.btn-view {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

.btn-view:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 슬라이더 네비게이션 */
.slider-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.slider-nav:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: white;
    transform: translateY(-50%) scale(1.1);
}

.slider-prev {
    left: 30px;
}

.slider-next {
    right: 30px;
}

.slider-nav span {
    line-height: 1;
    font-weight: 300;
}

/* 슬라이더 인디케이터 */
.slider-indicators {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid white;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
}

.indicator:hover {
    background: rgba(255, 255, 255, 0.5);
    transform: scale(1.2);
}

.indicator.active {
    background: white;
    width: 30px;
    border-radius: 6px;
}

/* 섹션 공통 스타일 */
.section {
    padding: 100px 0;
}

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

.section-number {
    font-size: 6rem;
    font-weight: 700;
    color: rgba(0, 61, 130, 0.1);
    line-height: 1;
    margin-bottom: 20px;
    letter-spacing: -0.05em;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 15px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* 제품 섹션 (ejiju 스타일) */
.products-section {
    background: var(--bg-white);
    padding: 100px 0;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.product-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

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

.product-image {
    width: 100%;
    height: 250px;
    background: var(--bg-light);
    overflow: hidden;
    position: relative;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s ease;
}

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

.product-placeholder {
    font-size: 4rem;
}

.product-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 20px 20px 10px;
}

.product-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0 20px 15px;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.product-description {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.8;
    margin: 0 20px 20px;
}

.product-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin: 0 20px 20px;
    transition: gap 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.product-card:hover .product-link {
    gap: 10px;
}

/* WHAT WE DO 섹션 */
.what-we-do-section {
    background: var(--bg-light);
    padding: 100px 0;
}

.what-we-do-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.what-we-do-item {
    background: var(--bg-white);
    border-radius: 8px;
    padding: 30px;
    transition: all 0.3s ease;
}

.what-we-do-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.what-we-do-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.item-subtitle {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 20px;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.item-media {
    width: 100%;
    height: 200px;
    background: var(--bg-light);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.media-placeholder {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* About 섹션 */
.about-section {
    background: var(--bg-white);
    padding: 100px 0;
}

.about-content-wrapper {
    margin-top: 60px;
}

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

.about-text {
    padding: 40px 0;
}

.about-text p {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.about-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: gap 0.3s ease;
}

.about-link:hover {
    gap: 15px;
}

.about-image {
    width: 100%;
    height: 400px;
    background: var(--bg-light);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
}

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

.image-placeholder {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* 사업분야 섹션 */
.business-area {
    background: var(--bg-white);
    padding: 100px 0;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.business-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 50px 40px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.business-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.business-card:hover::before {
    transform: scaleY(1);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 25px;
    display: block;
}

.business-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
    letter-spacing: -0.01em;
}

.business-card p {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 25px;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: gap 0.3s ease;
}

.card-link span {
    font-size: 12px;
    opacity: 0.7;
}

.business-card:hover .card-link {
    gap: 12px;
}

/* 회사소개 섹션 */
.about-company {
    background: var(--bg-light);
    padding: 100px 0;
}

.about-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.about-item {
    background: var(--bg-white);
    padding: 40px 30px;
    text-align: center;
    border-radius: 4px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.about-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.about-item h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.about-item p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.link-more {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: gap 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.about-item:hover .link-more {
    gap: 10px;
}

/* 연혁 섹션 */
/* 연혁 섹션 */
.history-section {
    position: relative;
    overflow: hidden;
}

.history-timeline {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding: 40px 0;
}

.history-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 50px;
    width: 3px;
    background: linear-gradient(180deg, 
        var(--primary-color) 0%, 
        rgba(0, 61, 130, 0.3) 50%, 
        var(--primary-color) 100%);
    transform: translateX(-50%);
    z-index: 0;
    pointer-events: none;
}

.timeline-item {
    display: flex;
    margin-bottom: 60px;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    z-index: 2;
}

.timeline-item:last-child {
    margin-bottom: 0;
    z-index: 10;
    position: relative;
    isolation: isolate;
}

.timeline-item:last-child .timeline-year {
    z-index: 11;
    position: relative;
}

.timeline-item:last-child .timeline-content {
    z-index: 10;
    position: relative;
}

.timeline-item:last-child .timeline-card {
    z-index: 10;
    background: var(--bg-white);
    position: relative;
    isolation: isolate;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

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

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

.timeline-year {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 700;
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(0, 61, 130, 0.3);
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-year {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 61, 130, 0.4);
}

.timeline-content {
    flex: 1;
    margin: 0 50px;
    position: relative;
    z-index: 2;
}

.timeline-card {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-top: 4px solid var(--primary-color);
    position: relative;
    overflow: hidden;
    z-index: 2;
}

.timeline-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.timeline-item:hover .timeline-card {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 61, 130, 0.15);
}

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

.timeline-card.highlight {
    background: linear-gradient(135deg, rgba(0, 61, 130, 0.05) 0%, rgba(0, 86, 179, 0.05) 100%);
    border-top-color: var(--accent-color);
}

.timeline-title {
    color: var(--primary-color);
    margin-bottom: 12px;
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.4;
}

.timeline-location {
    color: var(--accent-color);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 12px;
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 123, 255, 0.1);
    border-radius: 20px;
}

.timeline-description {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1rem;
    margin-top: 10px;
}

.timeline-list {
    list-style: none;
    padding: 0;
    margin: 15px 0 0 0;
}

.timeline-list li {
    color: var(--text-dark);
    line-height: 1.8;
    font-size: 1rem;
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.timeline-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.1rem;
}

/* 인사말 섹션 개선 스타일 */
.greetings-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(0, 61, 130, 0.02) 0%, rgba(0, 86, 179, 0.03) 100%);
}

.greetings-content {
    max-width: 900px;
    margin: 0 auto;
}

.greetings-card {
    background: var(--bg-white);
    border-radius: 16px;
    padding: 60px 50px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.greetings-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.greetings-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 50px rgba(0, 0, 0, 0.12);
}

.greetings-icon {
    font-size: 4rem;
    text-align: center;
    margin-bottom: 30px;
    animation: wave 2s ease-in-out infinite;
}

.greetings-text {
    text-align: center;
}

.greetings-intro {
    font-size: 1.3rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 30px;
    font-weight: 500;
}

.greetings-intro strong {
    color: var(--primary-color);
    font-weight: 600;
}

.greetings-body {
    margin-bottom: 40px;
}

.greetings-body p {
    font-size: 1.05rem;
    line-height: 2;
    color: var(--text-light);
    margin-bottom: 20px;
}

.greetings-signature {
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.greetings-thanks {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-dark);
    font-weight: 600;
    margin-bottom: 15px;
}

.greetings-name {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-light);
}

.greetings-name strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* 회사개요 섹션 개선 스타일 */
.overview-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.overview-section-block {
    margin-bottom: 80px;
}

.overview-section-block:last-child {
    margin-bottom: 0;
}

.overview-subtitle {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 35px;
    text-align: left;
    position: relative;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.overview-subtitle::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

/* 회사 정보 그리드 */
.company-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.info-card {
    background: var(--bg-white);
    padding: 25px 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    text-align: left;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.info-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.info-card:hover::before {
    transform: scaleY(1);
}

.info-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 61, 130, 0.08);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.info-card:hover .info-icon {
    background: rgba(0, 61, 130, 0.15);
    transform: scale(1.1);
}

.info-card > div:last-child {
    flex: 1;
    min-width: 0;
}

.info-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
    display: block;
}

.info-value {
    font-size: 1rem;
    color: var(--text-dark);
    line-height: 1.6;
    font-weight: 400;
    word-break: break-word;
    margin: 0;
}

.info-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.info-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

/* 주요 사업 그리드 */
.business-grid-modern {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

.business-card-modern {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.business-card-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.business-card-modern:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

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

.business-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
    display: block;
    transition: transform 0.3s ease;
}

.business-card-modern:hover .business-icon {
    transform: scale(1.1) rotate(5deg);
}

.business-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.business-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* 생산 설비 카드 */
.facility-card {
    background: var(--bg-white);
    padding: 50px 40px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    border: 2px solid var(--primary-color);
    position: relative;
    overflow: hidden;
}

.facility-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 61, 130, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.facility-stats {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
}

.stat-item {
    flex: 1;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
}

.facility-note {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    position: relative;
    z-index: 1;
}

/* 오시는길 섹션 개선 스타일 */
.location-section {
    padding: 100px 0;
    background: var(--bg-light);
}

.location-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.location-subtitle {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 30px;
}

.location-card {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.location-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.location-item:last-child {
    border-bottom: none;
}

.location-item:hover {
    padding-left: 10px;
}

.location-item-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.location-item-content {
    flex: 1;
}

.location-item-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.location-item-value {
    font-size: 1rem;
    color: var(--text-dark);
    line-height: 1.6;
}

.location-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.location-link:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

.transport-guide {
    margin-top: 30px;
}

.transport-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.transport-card {
    background: var(--bg-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
}

.transport-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 25px;
}

.transport-item:last-child {
    margin-bottom: 0;
}

.transport-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.transport-content {
    flex: 1;
}

.transport-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.transport-desc {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.8;
}

.location-map {
    position: sticky;
    top: 100px;
}

.map-container {
    width: 100%;
    height: 500px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    border: 2px solid var(--primary-color);
    margin-bottom: 20px;
}

.map-note {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.8;
    text-align: center;
}

/* 반응형 디자인 */
@media (max-width: 968px) {
    .location-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .location-map {
        position: static;
    }
    
    .greetings-card {
        padding: 40px 30px;
    }
    
    .company-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .business-grid-modern {
        grid-template-columns: 1fr;
    }
    
    .facility-stats {
        flex-direction: column;
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .company-info-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .info-card {
        padding: 20px 15px;
    }
    
    .info-icon {
        width: 45px;
        height: 45px;
        font-size: 1.8rem;
    }
    
    .greetings-card {
        padding: 30px 20px;
    }
    
    .greetings-icon {
        font-size: 3rem;
    }
    
    .overview-subtitle {
        font-size: 1.5rem;
        text-align: center;
    }
    
    .overview-subtitle::after {
        left: 50%;
        transform: translateX(-50%);
    }
}

/* 생산설비 섹션 */
.facilities-section {
    background: var(--bg-light);
    padding: 100px 0;
}

.facilities-overview {
    margin-bottom: 50px;
}

.overview-box {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 4px;
    text-align: center;
    box-shadow: var(--shadow);
    max-width: 600px;
    margin: 0 auto;
}

.overview-box h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.overview-number {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.overview-box p {
    color: var(--text-light);
    margin-bottom: 10px;
}

.note {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
}

.table-wrapper {
    margin: 50px 0;
}

.table-wrapper h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 20px;
    text-align: center;
}

.table-scroll {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-white);
    box-shadow: var(--shadow);
    border-radius: 4px;
    overflow: hidden;
}

.data-table thead {
    background: var(--primary-color);
    color: white;
}

.data-table th,
.data-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background: var(--bg-light);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.facilities-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.feature-item {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.feature-item h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
    font-weight: 600;
}

.feature-item p {
    color: var(--text-light);
    line-height: 1.8;
}

/* 인증서 섹션 */
.certifications-section {
    background: var(--bg-white);
    padding: 100px 0;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.cert-item {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    padding: 40px 30px;
    text-align: center;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.cert-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.cert-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.cert-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 15px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #e0e0e0;
}

.cert-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: pointer;
    transition: transform 0.3s ease;
}

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

.cert-item h3 {
    color: var(--text-dark);
    margin-bottom: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.cert-item p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 0.95rem;
}

/* 연락처 섹션 */
.contact-section {
    background: var(--bg-light);
    padding: 100px 0;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.contact-item {
    background: var(--bg-white);
    padding: 40px 30px;
    text-align: center;
    border-radius: 4px;
    box-shadow: var(--shadow);
}

.contact-item h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
    font-weight: 600;
}

.contact-item p {
    color: var(--text-light);
    line-height: 1.8;
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--secondary-color);
    text-decoration: underline;
}

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

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-left {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer-logo-img {
    height: 50px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    filter: brightness(0) invert(1);
    margin-bottom: 10px;
}

.footer-logo p {
    font-size: 14px;
    line-height: 1.8;
    opacity: 0.8;
}

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

.footer-links a {
    color: white;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-color);
}

.footer-right {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.footer-contact h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    font-weight: 600;
}

.footer-contact p {
    font-size: 14px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 8px;
}

.footer-contact strong {
    font-weight: 600;
    margin-right: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    opacity: 0.7;
}

/* 반응형 디자인 */
@media (max-width: 1024px) {
    .products-grid,
    .what-we-do-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-main {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-left {
        grid-template-columns: 1fr;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header.scrolled {
        background: var(--bg-white);
    }

    .lang-selector {
        display: none;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: left;
        transition: 0.3s;
        box-shadow: var(--shadow-hover);
        padding: 20px 0;
        gap: 0;
        height: auto;
    }

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

    .nav-item {
        width: 100%;
        height: auto;
    }

    .nav-link {
        width: 100%;
        padding: 15px 20px;
        height: auto;
        color: var(--text-dark);
        margin: 0;
    }

    .nav-link:hover {
        background: rgba(0, 61, 130, 0.1);
        color: var(--primary-color);
    }

    .submenu {
        position: static;
        display: none;
        box-shadow: none;
        background: var(--bg-light);
        margin-left: 20px;
    }

    .nav-item:hover .submenu,
    .nav-item.active .submenu {
        display: block;
    }

    .nav-toggle {
        display: flex;
    }

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

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .main-visual {
        height: 100vh;
        min-height: 500px;
    }

    .visual-title {
        font-size: 2.5rem;
    }

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

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .history-timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
        margin-bottom: 40px;
    }

    .timeline-year {
        width: 70px;
        height: 70px;
        font-size: 1.1rem;
        position: absolute;
        left: 0;
        margin: 0;
    }

    .timeline-content {
        margin: 0;
        margin-left: 20px;
    }

    .timeline-card {
        padding: 20px;
    }

    .timeline-title {
        font-size: 1.2rem;
    }

    .history-timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 80px;
    }

    .timeline-year {
        width: 60px;
        height: 60px;
        font-size: 1rem;
        position: absolute;
        left: 0;
    }

    .timeline-content {
        margin: 0;
        margin-left: 20px;
        border-left: 3px solid var(--primary-color) !important;
        border-right: none !important;
    }

    .products-grid,
    .what-we-do-grid {
        grid-template-columns: 1fr;
    }

    .section-number {
        font-size: 4rem;
    }

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

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

    .facilities-features {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 480px) {
    .visual-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .business-card,
    .about-item,
    .cert-item {
        padding: 30px 20px;
    }
}

/* 스크롤 애니메이션 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}