:root {
    --blue-600: #0052FF;
    --blue-500: #2563EB;
    --blue-400: #3B82F6;
    --blue-100: #DBEAFE;
    --blue-50: #EFF6FF;
    --gray-900: #111827;
    --gray-800: #1F2937;
    --gray-700: #374151;
    --gray-600: #4B5563;
    --gray-500: #6B7280;
    --gray-400: #9CA3AF;
    --gray-300: #D1D5DB;
    --gray-200: #E5E7EB;
    --gray-100: #F3F4F6;
    --gray-50: #F9FAFB;
    --white: #FFFFFF;
    --green-500: #10B981;
    --orange-500: #F59E0B;
    --red-500: #EF4444;
    --gradient-blue: linear-gradient(135deg, #0052FF 0%, #3B82F6 50%, #60A5FA 100%);
    --gradient-hero: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--white);
    color: var(--gray-800);
    line-height: 1.7;
    font-size: 16px;
}

a {
    color: var(--blue-600);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--blue-500);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-900);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
}

.logo:hover {
    color: var(--gray-900);
}

.logo img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--gray-700);
    transition: all var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-menu-header,
.nav-menu-footer,
.nav-divider,
.nav-icon,
.nav-close-btn,
.nav-overlay {
    display: none;
}

.nav-menu a {
    color: var(--gray-600);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-menu a:hover {
    color: var(--blue-600);
}

.nav-cta {
    background: var(--blue-600);
    color: var(--white) !important;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
}

.nav-cta:hover {
    background: var(--blue-500);
    color: var(--white) !important;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-bg-video {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    object-fit: cover;
    opacity: 0.6;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, 
        rgba(239, 246, 255, 0.65) 0%, 
        rgba(219, 234, 254, 0.6) 50%,
        rgba(255, 255, 255, 0.85) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 10px 24px;
    background: var(--white);
    border: 1px solid var(--blue-200);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--blue-600);
    font-weight: 600;
    margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 82, 255, 0.2); }
    50% { box-shadow: 0 0 0 10px rgba(0, 82, 255, 0); }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 7vw, 4.5rem);
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--blue-600);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--blue-500);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: var(--white);
    color: var(--blue-600);
    border: 2px solid var(--blue-600);
}

.btn-outline:hover {
    background: var(--blue-50);
    color: var(--blue-600);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.hero-stats {
    display: flex;
    gap: 64px;
    justify-content: center;
}

.stat {
    text-align: center;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    color: var(--blue-600);
}

.stat-unit {
    font-family: var(--font-display);
    font-size: 1.8rem;
    color: var(--blue-600);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-top: 6px;
}

section {
    padding: 100px 0;
}

.section-label {
    display: inline-block;
    padding: 6px 14px;
    background: var(--blue-50);
    color: var(--blue-600);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 50px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 48px;
}

.section-cta {
    text-align: center;
    margin-top: 48px;
}

.intro {
    background: var(--white);
}

.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.intro-text p {
    color: var(--gray-600);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.intro-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: 12px;
    transition: all var(--transition);
}

.feature-item:hover {
    background: var(--blue-50);
    transform: translateX(5px);
}

.feature-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
}

.feature-content h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.feature-content p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin: 0;
}

.features {
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--blue-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.6;
}

.compare {
    background: var(--white);
}

.compare-wrapper {
    overflow-x: auto;
    margin-bottom: 64px;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 500px;
}

.compare-table th,
.compare-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.compare-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-700);
}

.compare-table td {
    color: var(--gray-600);
}

.highlight-col {
    background: var(--blue-50) !important;
    color: var(--gray-900) !important;
    font-weight: 500;
}

.check {
    color: var(--green-500);
    font-weight: 700;
    margin-right: 4px;
}

.migration-section {
    background: var(--gray-50);
    padding: 48px;
    border-radius: 20px;
}

.migration-section h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--gray-900);
    margin-bottom: 32px;
    text-align: center;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.step {
    text-align: center;
    padding: 24px 16px;
    background: var(--white);
    border-radius: 12px;
}

.step-num {
    width: 40px;
    height: 40px;
    background: var(--gradient-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-weight: 700;
    margin: 0 auto 16px;
}

.step h4 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.step p {
    font-size: 0.85rem;
    color: var(--gray-500);
}

.warning-box {
    display: flex;
    gap: 12px;
    padding: 16px 20px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--orange-500);
    border-radius: 10px;
}

.warning-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.warning-box p {
    font-size: 0.9rem;
    color: var(--gray-700);
    margin: 0;
}

.download {
    background: var(--gray-900);
    color: var(--white);
}

.download .section-label {
    background: rgba(255, 255, 255, 0.1);
    color: var(--blue-400);
}

.download .section-title {
    color: var(--white);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.download-info p {
    color: var(--gray-400);
    margin-bottom: 32px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--gray-800);
    border: 1px solid var(--gray-700);
    border-radius: 12px;
    color: var(--white);
    transition: all var(--transition);
}

.download-btn:hover {
    background: var(--gray-700);
    border-color: var(--blue-500);
    color: var(--white);
}

.dl-icon {
    font-size: 2rem;
}

.dl-text small {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-500);
}

.dl-text strong {
    font-size: 1rem;
}

.download-tips {
    padding: 20px;
    background: var(--gray-800);
    border-radius: 12px;
}

.download-tips h4 {
    font-size: 0.95rem;
    color: var(--blue-400);
    margin-bottom: 12px;
}

.download-tips ul {
    list-style: none;
}

.download-tips li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 8px;
    color: var(--gray-400);
    font-size: 0.9rem;
}

.download-tips li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--blue-400);
}

.download-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tablet-frame {
    width: 360px;
    height: 480px;
    background: linear-gradient(145deg, #3a3a3a, #1a1a1a);
    border-radius: 24px;
    padding: 16px;
    box-shadow: var(--shadow-xl);
}

.tablet-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
}

.carousel {
    width: 100%;
    height: 100%;
    position: relative;
}

.carousel-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.carousel-img.active {
    opacity: 1;
}

.carousel-dots {
    display: flex;
    gap: 8px;
    margin-top: 20px;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition);
}

.dot.active {
    background: var(--blue-500);
    width: 24px;
    border-radius: 4px;
}

.tutorial {
    background: var(--white);
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.tutorial-card {
    padding: 28px 24px;
    background: var(--gray-50);
    border-radius: 16px;
    transition: all var(--transition);
}

.tutorial-card:hover {
    background: var(--blue-50);
}

.tutorial-icon {
    width: 72px;
    height: 72px;
    margin-bottom: 20px;
    border-radius: 16px;
    overflow: hidden;
    background: var(--blue-50);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tutorial-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tutorial-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.tutorial-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin-bottom: 16px;
    line-height: 1.6;
}

.link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--blue-600);
}

.transfer-notice {
    margin-top: 48px;
    padding: 32px;
    background: var(--gray-50);
    border-radius: 16px;
}

.transfer-notice h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--gray-900);
    margin-bottom: 24px;
    text-align: center;
}

.notice-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.notice-item {
    display: flex;
    gap: 12px;
    padding: 20px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
}

.notice-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.notice-item h4 {
    font-size: 1rem;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.notice-item p {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin: 0;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .notice-grid {
        grid-template-columns: 1fr;
    }
}

.faq {
    background: var(--gray-50);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all var(--transition);
}

.faq-item:hover {
    border-color: var(--blue-300);
}

.faq-item.active {
    border-color: var(--blue-500);
    box-shadow: var(--shadow-md);
}

.faq-q {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 500;
    color: var(--gray-800);
    text-align: left;
}

.faq-icon {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: var(--blue-600);
    transition: transform var(--transition);
}

.faq-icon::before {
    width: 12px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    width: 2px;
    height: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
}

.faq-item.active .faq-a {
    max-height: 300px;
}

.faq-a p {
    padding: 0 24px 20px;
    color: var(--gray-600);
    line-height: 1.8;
}

.safety {
    background: var(--white);
}

.safety-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.safety-card {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--gray-50);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
}

.safety-card.warning {
    background: rgba(245, 158, 11, 0.05);
    border-color: var(--orange-500);
}

.safety-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.safety-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.safety-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin: 0;
}

.disclaimer {
    margin-top: 48px;
    padding: 20px;
    background: var(--gray-100);
    border-radius: 10px;
}

.disclaimer p {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin: 0;
}

.news {
    background: var(--gray-50);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    padding: 28px;
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    transition: all var(--transition);
}

.news-card:hover {
    border-color: var(--blue-300);
    box-shadow: var(--shadow-md);
}

.news-date {
    display: inline-block;
    font-size: 0.8rem;
    color: var(--blue-600);
    margin-bottom: 12px;
}

.news-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    margin: 0;
}

.contact {
    background: var(--white);
}

.contact-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 64px;
    background: var(--gradient-hero);
    border-radius: 24px;
}

.contact-info .section-title {
    margin-bottom: 20px;
}

.contact-info > p {
    color: var(--gray-600);
    margin-bottom: 24px;
}

.contact-features {
    list-style: none;
    margin-bottom: 32px;
}

.contact-features li {
    padding: 8px 0;
    color: var(--gray-700);
}

.contact-warning {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--orange-500);
}

.contact-image img {
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

.about {
    background: var(--gray-50);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 64px;
    align-items: center;
}

.about-img {
    border-radius: 20px;
    box-shadow: var(--shadow-xl);
}

.about-text .section-title {
    margin-bottom: 24px;
}

.about-text p {
    color: var(--gray-600);
    margin-bottom: 16px;
}

.about-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.badge {
    padding: 10px 16px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--gray-700);
}

.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 48px 0 24px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--gray-800);
    margin-bottom: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-brand img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.footer-logo {
    display: block;
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
}

.footer-slogan {
    font-size: 0.8rem;
    color: var(--gray-500);
}

.footer-nav {
    display: flex;
    gap: 32px;
}

.footer-nav a {
    color: var(--gray-400);
    font-size: 0.9rem;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--gray-500);
    font-size: 0.85rem;
}

.footer-links a:hover {
    color: var(--gray-300);
}

.footer-info {
    text-align: right;
}

.footer-info p {
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.footer-info a {
    color: var(--gray-500);
}

.back-top {
    position: fixed;
    bottom: 110px;
    right: 24px;
    width: 48px;
    height: 48px;
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: 12px;
    color: var(--blue-600);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

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

.back-top:hover {
    background: var(--blue-600);
    color: var(--white);
    border-color: var(--blue-600);
}

@media (max-width: 1024px) {
    .features-grid,
    .tutorial-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-stats {
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu-header {
        display: flex;
    }
    
    .nav-menu-footer {
        display: block;
    }
    
    .nav-divider {
        display: block;
    }
    
    .nav-icon {
        display: inline;
    }
    
    .nav-close-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        background: linear-gradient(180deg, var(--white) 0%, var(--blue-50) 100%);
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        gap: 0;
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
        overflow-y: auto;
        z-index: 999;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu-header {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 28px 24px;
        background: var(--gradient-blue);
        color: var(--white);
        position: relative;
    }
    
    .nav-menu-header img {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }
    
    .nav-menu-title {
        display: block;
        font-family: var(--font-display);
        font-size: 1.2rem;
        font-weight: 700;
    }
    
    .nav-menu-slogan {
        display: block;
        font-size: 0.75rem;
        opacity: 0.85;
        margin-top: 2px;
    }
    
    .nav-close-btn {
        position: absolute;
        top: 20px;
        right: 20px;
        width: 32px;
        height: 32px;
        background: rgba(255, 255, 255, 0.2);
        border: none;
        border-radius: 8px;
        color: var(--white);
        font-size: 1rem;
        cursor: pointer;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all var(--transition);
    }
    
    .nav-close-btn:hover {
        background: rgba(255, 255, 255, 0.3);
    }
    
    .nav-divider {
        height: 1px;
        background: var(--gray-200);
        margin: 8px 24px;
    }
    
    .nav-menu li {
        list-style: none;
    }
    
    .nav-menu li a {
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 16px 24px;
        color: var(--gray-700);
        font-size: 1rem;
        font-weight: 500;
        transition: all var(--transition);
        border-left: 3px solid transparent;
    }
    
    .nav-menu li a:hover,
    .nav-menu li a:active {
        background: var(--blue-50);
        color: var(--blue-600);
        border-left-color: var(--blue-600);
    }
    
    .nav-icon {
        font-size: 1.2rem;
        width: 28px;
        text-align: center;
    }
    
    .nav-menu .nav-cta {
        margin: 8px 24px;
        padding: 14px 20px;
        background: var(--blue-600);
        color: var(--white) !important;
        border-radius: 12px;
        justify-content: center;
        border-left: none !important;
        font-weight: 600;
        box-shadow: 0 4px 12px rgba(0, 82, 255, 0.3);
    }
    
    .nav-menu .nav-cta:hover {
        background: var(--blue-500);
        transform: translateY(-1px);
    }
    
    .nav-menu-footer {
        margin-top: auto;
        padding: 20px 24px;
        background: var(--gray-100);
        border-top: 1px solid var(--gray-200);
    }
    
    .nav-menu-footer p {
        font-size: 0.8rem;
        color: var(--gray-500);
        margin-bottom: 10px;
    }
    
    .nav-badges {
        display: flex;
        gap: 12px;
    }
    
    .nav-badges span {
        font-size: 0.7rem;
        color: var(--gray-600);
        background: var(--white);
        padding: 4px 10px;
        border-radius: 20px;
        border: 1px solid var(--gray-200);
    }
    
    .nav-overlay {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 998;
        backdrop-filter: blur(2px);
    }
    
    .nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    section {
        padding: 64px 0;
    }
    
    .intro-grid,
    .download-content,
    .contact-box,
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .features-grid,
    .tutorial-grid,
    .safety-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .migration-section {
        padding: 32px 20px;
    }
    
    .contact-box {
        padding: 32px 24px;
    }
    
    .footer-top,
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 24px;
    }
    
    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
    
    .footer-info {
        text-align: center;
    }
    
    .tablet-frame {
        width: 300px;
        height: 400px;
    }
    
    .back-top {
        right: 16px;
        bottom: 110px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .stat-value {
        font-size: 2.5rem;
    }
    
    .stat-unit {
        font-size: 1.5rem;
    }
}