/* CSS Variables & Theme */
:root {
    --primary-color: #0088cc;
    --primary-light: #52bbf5;
    --secondary-color: #2b3a4a;
    --accent-color: #f39c12;
    --bg-color: #ffffff;
    --bg-alt: #f4f7fa;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #e2e8f0;
    --font-heading: 'Montserrat', 'Noto Sans KR', sans-serif;
    --font-body: 'Noto Sans KR', sans-serif;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-color);
    overflow-x: hidden;
    word-break: keep-all; /* Prevent natural character breaking in Korean */
}

body.no-scroll {
    overflow: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 5%;
}

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

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

.badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 136, 204, 0.1);
    color: var(--primary-color);
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 20px;
    border: 1px solid rgba(0, 136, 204, 0.3);
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text; /* Fix lint */
    -webkit-text-fill-color: transparent;
}

.gradient-bg {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.btn {
    display: inline-block;
    padding: 14px 30px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 136, 204, 0.3);
}

.btn-primary:hover {
    background-color: #0077b3;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 136, 204, 0.4);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn {
    display: inline-block;
    padding: 14px 30px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 136, 204, 0.3), inset 0 -3px 0 rgba(0,0,0,0.1);
}

.btn-primary:hover {
    background-color: #0077b3;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 136, 204, 0.4), inset 0 -3px 0 rgba(0,0,0,0.1);
}

.btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 136, 204, 0.3), inset 0 -1px 0 rgba(0,0,0,0.1);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid white;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.btn-outline:hover {
    background: white;
    color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255,255,255,0.2);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.header.scrolled .logo, 
.header.scrolled .nav-link {
    color: var(--secondary-color);
}

.header.scrolled .mobile-menu-btn {
    color: var(--secondary-color);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 3D Language Switcher - Premium Segmented Control */
.lang-switcher-3d {
    perspective: 1000px;
    margin-right: 15px;
}

.lang-selection {
    position: relative;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    padding: 6px;
    display: flex;
    gap: 5px;
    box-shadow: 
        0 10px 30px rgba(0,0,0,0.2),
        inset 0 1px 2px rgba(255,255,255,0.3);
    transform-style: preserve-3d;
    transition: transform 0.3s ease;
}

.lang-selection:hover {
    transform: rotateX(5deg) translateY(-2px);
}

.lang-btn {
    position: relative;
    background: transparent;
    border: none;
    padding: 8px 18px;
    border-radius: 25px;
    color: white;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 800;
    cursor: pointer;
    z-index: 2;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lang-btn:hover {
    transform: translateZ(10px);
    color: white;
}

.lang-btn.active {
    color: white;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.lang-active-bg {
    position: absolute;
    top: 6px;
    left: 6px;
    height: calc(100% - 12px);
    background: linear-gradient(135deg, #0088cc, #00c6ff); /* Vivid Sky Blue Gradient */
    border-radius: 25px;
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1;
    box-shadow: 0 4px 15px rgba(0, 136, 204, 0.5);
}

/* Adjust active background width/position dynamically via JS or specific classes */
.lang-btn[data-lang="en"].active ~ .lang-active-bg { width: 85px; left: 6px; }
.lang-btn[data-lang="zh-CN"].active ~ .lang-active-bg { width: 65px; left: 96px; }
.lang-btn[data-lang="ko"].active ~ .lang-active-bg { width: 75px; left: 166px; }

/* Scrolled Header State & Mobile Default Visibility */
.header.scrolled .lang-selection {
    background: rgba(0, 136, 204, 0.05);
    border-color: rgba(0, 136, 204, 0.1);
}

.header.scrolled .lang-btn {
    color: var(--secondary-color);
}

.header.scrolled .lang-btn.active {
    color: white;
}

@media (max-width: 768px) {
    .lang-selection {
        background: rgba(0, 136, 204, 0.05) !important;
        border-color: rgba(0, 136, 204, 0.1) !important;
    }
    .lang-btn {
        color: var(--secondary-color) !important;
    }
    .lang-btn.active {
        color: white !important;
    }
}

/* Google Translate Hidden Styles */
.goog-te-gadget { color: transparent !important; font-size: 0px; }
.goog-te-gadget .goog-te-combo { margin: 0 !important; }
.goog-te-banner-frame.skiptranslate { display: none !important; }
body {
    top: 0px !important;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    color: white;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 1px;
    transition: transform 0.3s ease;
}

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

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

.nav-list {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: white;
    font-weight: 600;
    font-size: 1.05rem;
    position: relative;
    padding: 5px 0;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-light);
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--primary-light);
    transition: var(--transition);
    border-radius: 2px;
}

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

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: url('images/sky_space_hero.png') center/cover no-repeat;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(43, 58, 74, 0.8) 0%, rgba(0, 136, 204, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 10;
}

.hero-text-box {
    max-width: 900px; /* Increased to avoid character orphans */
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 800;
    color: white;
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.hero-title .text-gradient {
    background: linear-gradient(to right, #ffffff, var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text; /* Fix lint */
    -webkit-text-fill-color: transparent;
}

.hero-desc {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    max-width: 600px;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid white;
    border-radius: 20px;
    display: block;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% { top: 10px; opacity: 1; }
    100% { top: 25px; opacity: 0; }
}

/* Animations */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Title Component */
.section-title {
    margin-bottom: 60px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.section-title .title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.section-title .subtitle {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
}

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

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

.about-card {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-light);
    box-shadow: 0 15px 40px rgba(0, 136, 204, 0.1);
}

.card-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.about-card h3 .en {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-top: 5px;
}

.about-card p {
    color: var(--text-muted);
}

/* Philosophy */
.philosophy {
    background: url('https://images.unsplash.com/photo-1506501139174-099022df5260?ixlib=rb-4.0.3&auto=format&fit=crop&w=2071&q=80') center/cover fixed;
    position: relative;
    color: white;
}

.philosophy::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(43, 58, 74, 0.85);
}

.philosophy-container {
    position: relative;
    z-index: 10;
    max-width: 800px;
    text-align: center;
}

.quote-icon {
    font-size: 3rem;
    color: var(--primary-light);
    margin-bottom: 30px;
}

.philosophy .title {
    font-size: 2.5rem; /* Slightly larger */
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 30px;
    word-break: keep-all;
}

.philosophy .desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
}

/* Business Section */
.business {
    background-color: var(--bg-alt);
}

.business-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 25px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
}

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

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 136, 204, 0.2);
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.business-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.05);
}

.b-text {
    padding: 50px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.b-text h3 {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.b-lead {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 30px;
}

.b-list li {
    margin-bottom: 15px;
    font-size: 1.05rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.b-list li i {
    margin-top: 5px;
}

.b-image {
    background-size: cover;
    background-position: center;
    min-height: 400px;
}

.image-pet { background-image: url('images/pet_premium_furniture.png'); }
.image-construction { background-image: url('images/pet_mat_oem.png'); }
.image-csr { background-image: url('https://images.unsplash.com/photo-1488521787991-ed7bbaae773c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1000&q=80'); }

/* Pet Product Preview Gallery */
.product-preview-gallery {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.p-preview-item {
    flex: 1;
    background: var(--bg-alt);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.p-preview-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 20px rgba(0, 136, 204, 0.1);
}

.p-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.p-preview-item h4 {
    font-size: 1rem;
    color: var(--secondary-color);
    font-weight: 700;
}

/* Platform */
.platform {
    background-color: var(--bg-color);
    position: relative;
    overflow: hidden;
}

.platform::before {
    content: '';
    position: absolute;
    top: -50%; right: -20%;
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(0,136,204,0.05) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
}

.platform-wrapper {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 50px;
    align-items: center;
}

.p-content .title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    color: var(--secondary-color);
    margin-bottom: 25px;
    line-height: 1.3;
}

.p-content .desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.8;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}

.tags span {
    background: var(--bg-alt);
    color: var(--primary-color);
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
}

.p-image-box {
    position: relative;
    height: 100%;
    min-height: 350px;
    background: url('https://images.unsplash.com/photo-1620641788421-7a1c342ea42e?ixlib=rb-4.0.3&auto=format&fit=crop&w=1000&q=80') center/cover;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.glass-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    max-width: 80%;
    border: 1px solid rgba(255,255,255,0.5);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.glow-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.glass-card h4 {
    font-size: 1.2rem;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

/* Certs */
.certs.section {
    padding: 60px 0;
}

.cert-scroll-container {
    overflow: hidden;
    position: relative;
    width: 100%;
    mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    padding: 20px 0;
}

.cert-grid {
    display: flex;
    gap: 40px;
    flex-wrap: nowrap;
    width: max-content;
    animation: scrollCerts 35s linear infinite;
}

.cert-grid:hover {
    animation-play-state: paused;
}

@keyframes scrollCerts {
    0% { transform: translateX(0); }
    100% { transform: translateX(calc(-250px * 12 - 40px * 12)); }
}

.cert-grid::-webkit-scrollbar {
    display: none;
}

.cert-item {
    flex: 0 0 250px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 35px 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    text-align: center;
    backdrop-filter: blur(20px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
    overflow: hidden;
    color: white;
}

.cert-item:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--vivid-sky-blue);
    transform: translateY(-12px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.cert-item i {
    font-size: 3.2rem;
    background: var(--blue-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: transform 0.4s ease;
}

.cert-item:hover i {
    transform: scale(1.15) rotate(5deg);
}

.cert-item span {
    font-weight: 600;
    font-size: 1.1rem;
    line-height: 1.3;
}

.cert-verify {
    font-size: 0.85rem;
    color: var(--vivid-sky-blue);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 5px;
}

.cert-click-hint {
    position: absolute;
    bottom: -40px;
    left: 0;
    width: 100%;
    background: var(--blue-gradient);
    color: white;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 8px 0;
    transition: bottom 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.cert-item:hover .cert-click-hint {
    bottom: 0;
}

/* Certification Modal (Lightbox) */
.cert-modal {
    display: none;
    position: fixed;
    z-index: 10001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.95);
    backdrop-filter: blur(20px);
    opacity: 0;
    transition: opacity 0.4s ease;
    align-items: center;
    justify-content: center;
}

.cert-modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    max-width: 95%;
    max-height: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    justify-content: center;
}

.cert-modal.active .modal-content {
    transform: scale(1);
}

.modal-content img {
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 85vh;
    border-radius: 12px;
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.4);
    border: 1px solid rgba(255,255,255,0.1);
}

.modal-close {
    position: absolute;
    top: 30px;
    right: 40px;
    color: #fff;
    font-size: 45px;
    font-weight: 200;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10002;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.modal-close:hover {
    background: var(--vivid-sky-blue);
    transform: rotate(90deg);
}

@media (max-width: 768px) {
    .modal-close {
        top: 20px;
        right: 20px;
        font-size: 35px;
    }
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 20px;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.f-logo {
    color: white;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.f-brands h4 {
    color: white;
    margin-bottom: 15px;
}

.brands-list {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.brands-list span {
    padding: 5px 15px;
    background: rgba(255,255,255,0.1);
    border-radius: 5px;
    font-size: 0.85rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: white;
}

.footer-bottom a:hover {
    color: var(--primary-light);
}

/* Responsive */
@media (max-width: 992px) {
    .business-layout {
        grid-template-columns: 1fr;
    }
    .b-image {
        min-height: 350px;
    }
    .platform-wrapper {
        grid-template-columns: 1fr;
    }
}

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

    .container {
        padding: 0 20px;
    }

    .section-title {
        margin-bottom: 40px;
    }

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

    /* Mobile Header & Nav Improvements */
    .header {
        background: rgba(255, 255, 255, 0.9);
        backdrop-filter: blur(15px);
        padding: 12px 0;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }

    .logo, .mobile-menu-btn {
        color: var(--secondary-color) !important;
    }

    .logo-icon svg {
        filter: brightness(0.7);
    }

    .nav-list {
        display: flex;
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(25px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 30px;
        transition: 0.6s cubic-bezier(0.85, 0, 0.15, 1);
        z-index: 1000;
        opacity: 0;
    }

    .nav-list.active {
        right: 0;
        opacity: 1;
    }

    .nav-link {
        color: var(--secondary-color);
        font-size: 1.6rem;
        font-weight: 800;
        padding: 15px 0;
        opacity: 0;
        transform: translateY(20px);
        transition: 0.5s;
        font-family: var(--font-heading);
    }

    .nav-list.active .nav-link {
        opacity: 1;
        transform: translateY(0);
    }

    /* Staggered entry for menu items */
    .nav-list.active li:nth-child(1) .nav-link { transition-delay: 0.2s; }
    .nav-list.active li:nth-child(2) .nav-link { transition-delay: 0.3s; }
    .nav-list.active li:nth-child(3) .nav-link { transition-delay: 0.4s; }
    .nav-list.active li:nth-child(4) .nav-link { transition-delay: 0.5s; }
    .nav-list.active li:nth-child(5) .nav-link { transition-delay: 0.6s; }

    .mobile-menu-btn {
        display: block;
        z-index: 2000;
        font-size: 1.8rem;
    }

    /* Language Switcher Mobile */
    .lang-switcher-3d {
        margin-right: 10px;
        transform: scale(0.85);
        transform-origin: right center;
    }

    .lang-btn {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .lang-btn[data-lang="en"].active ~ .lang-active-bg { width: 62px; left: 6px; }
    .lang-btn[data-lang="zh-CN"].active ~ .lang-active-bg { width: 50px; left: 72px; }
    .lang-btn[data-lang="ko"].active ~ .lang-active-bg { width: 50px; left: 127px; }

    /* Hero Section Mobile */
    .hero-title {
        font-size: 2.4rem;
        line-height: 1.25;
        word-break: keep-all;
    }

    .hero-desc {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .hero-btns {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        width: 100%;
        text-align: center;
        padding: 16px;
    }

    /* About Cards Mobile */
    .about-grid {
        gap: 20px;
    }

    .about-card {
        padding: 35px 25px;
        box-shadow: 0 5px 20px rgba(0,0,0,0.03);
    }

    /* Philosophy Mobile */
    .philosophy .title {
        font-size: 1.5rem;
        line-height: 1.6;
    }

    /* Business Tabs Mobile - Horizontal Scroll */
    .business-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding: 5px 0 20px;
        margin-bottom: 25px;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
        gap: 12px;
    }

    .business-tabs::-webkit-scrollbar {
        display: none; /* Hide scrollbar for Safari and Chrome */
    }

    .tab-btn {
        padding: 10px 22px;
        font-size: 0.95rem;
        flex: 0 0 auto;
    }

    .business-layout {
        border-radius: 12px;
    }

    .b-text {
        padding: 35px 25px;
    }

    .b-text h3 {
        font-size: 1.6rem;
    }

    /* Platform Section Mobile */
    .p-content .title {
        font-size: 1.7rem;
    }

    .p-image-box {
        min-height: 300px;
        margin: 0 -20px;
        border-radius: 0;
    }

    /* Certs Mobile */
    .cert-grid {
        gap: 35px;
    }

    .cert-item i {
        font-size: 2.8rem;
    }

    /* Footer Mobile */
    .footer-container {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }

    .brands-list {
        justify-content: center;
    }
}

/* Floating Kakao Button */
.kakao-float-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #FEE500;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    z-index: 9999;
    transition: all 0.3s ease;
    animation: kakaoBounce 2s infinite;
}

.kakao-float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.kakao-float-btn img {
    width: 35px;
    height: 35px;
}

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