:root {
    --color-bg-primary: #0D1117;
    --color-bg-secondary: #161B22;
    --color-bg-tertiary: #21262D;
    --color-border: #30363D;
    --color-text-primary: #F0F6FC;
    --color-text-secondary: #8B949E;
    --color-text-muted: #6E7681;
    --color-accent-blue: #58A6FF;
    --color-accent-green: #7EE787;
    --color-accent-purple: #A371F7;
    --color-accent-orange: #FFA657;
    --color-warning: #F0883E;
    --color-danger: #F85149;
    --gradient-primary: linear-gradient(135deg, #58A6FF 0%, #A371F7 100%);
    --gradient-glow: linear-gradient(135deg, rgba(88, 166, 255, 0.15) 0%, rgba(163, 113, 247, 0.15) 100%);
    --shadow-glow-blue: 0 0 20px rgba(88, 166, 255, 0.3), 0 0 40px rgba(88, 166, 255, 0.1);
    --shadow-glow-green: 0 0 20px rgba(126, 231, 135, 0.3), 0 0 40px rgba(126, 231, 135, 0.1);
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

.cursor-glow {
    position: fixed;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
}

@media (min-width: 1024px) {
    .cursor-glow {
        opacity: 1;
    }
}

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

a:hover {
    color: var(--color-accent-purple);
}

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

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(13, 17, 23, 0.95);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-primary);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.5px;
}

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

.logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.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: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.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: 2rem;
    list-style: none;
}

.nav-menu a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

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

.nav-cta {
    background: var(--gradient-primary);
    padding: 0.6rem 1.2rem !important;
    border-radius: 8px;
    color: var(--color-bg-primary) !important;
    font-weight: 600 !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    box-shadow: var(--shadow-glow-blue);
    transform: translateY(-2px);
}

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

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

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(13, 17, 23, 0.7) 0%, rgba(13, 17, 23, 0.9) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    max-width: 900px;
    animation: fadeInUp 1s ease forwards;
}

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

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--gradient-glow);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--color-accent-blue);
    margin-bottom: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(88, 166, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(88, 166, 255, 0);
    }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.title-line {
    display: block;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 650px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-icon {
    font-size: 1.1rem;
}

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

.btn-primary:hover {
    box-shadow: var(--shadow-glow-blue);
    transform: translateY(-3px);
    color: var(--color-bg-primary);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent-blue);
    color: var(--color-text-primary);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent-blue);
    border: 1px solid var(--color-accent-blue);
}

.btn-outline:hover {
    background: rgba(88, 166, 255, 0.1);
    box-shadow: var(--shadow-glow-blue);
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent-blue);
}

.stat-suffix {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-accent-blue);
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85rem;
    animation: bounce 2s ease-in-out infinite;
}

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

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-text-muted);
    border-bottom: 2px solid var(--color-text-muted);
    transform: rotate(45deg);
    margin: 0.5rem auto 0;
}

.section-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 6rem 2rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--gradient-glow);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--color-accent-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.section-cta {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.section-cta p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.intro {
    background: var(--color-bg-secondary);
    position: relative;
    overflow: hidden;
}

.intro::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.intro-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-content p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

.intro-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 2rem;
}

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--color-text-primary);
}

.tag-icon {
    font-size: 1.1rem;
}

.intro-image {
    position: relative;
}

.image-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 80%;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.2) 0%, transparent 70%);
    filter: blur(40px);
    z-index: 0;
}

.intro-image img {
    position: relative;
    z-index: 1;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.features {
    background: var(--color-bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.feature-card {
    position: relative;
    padding: 2rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent-blue);
}

.card-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-glow);
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.feature-card:hover .card-glow {
    opacity: 1;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.feature-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.compare {
    background: var(--color-bg-secondary);
}

.compare-table-wrapper {
    overflow-x: auto;
    margin-bottom: 4rem;
    border-radius: 16px;
    border: 1px solid var(--color-border);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.compare-table th,
.compare-table td {
    padding: 1.2rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.compare-table th {
    background: var(--color-bg-tertiary);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-primary);
}

.compare-table th img {
    display: inline-block;
    vertical-align: middle;
    margin-right: 0.5rem;
    border-radius: 4px;
}

.compare-table td {
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
}

.compare-table td.highlight {
    color: var(--color-accent-green);
    font-weight: 500;
}

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

.compare-table tbody tr:hover td {
    background: var(--color-bg-tertiary);
}

.migration-guide {
    background: var(--color-bg-primary);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid var(--color-border);
}

.guide-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2.5rem;
}

.migration-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.step-card {
    padding: 1.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    position: relative;
}

.step-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-accent-blue);
    opacity: 0.3;
    position: absolute;
    top: 0.75rem;
    right: 1rem;
}

.step-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.step-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.migration-notice {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--color-danger);
    border-radius: 12px;
    margin-bottom: 2rem;
}

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

.notice-content {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.notice-content strong {
    color: var(--color-danger);
}

.download {
    background: var(--color-bg-primary);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
    align-items: center;
}

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

.phone-mockup {
    display: inline-block;
    position: relative;
}

.phone-frame {
    width: 380px;
    height: 520px;
    background: linear-gradient(145deg, #2d2d2d, #1a1a1a);
    border-radius: 28px;
    padding: 14px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    width: 4px;
    height: 60px;
    background: #444;
    border-radius: 2px;
}

.phone-frame::after {
    content: '';
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    background: #333;
    border-radius: 50%;
    box-shadow: inset 0 0 2px rgba(0,0,0,0.5);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

.app-carousel {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

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

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

.download-info h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.download-info > p {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    color: var(--color-text-primary);
    transition: all var(--transition-normal);
}

.download-btn:hover {
    border-color: var(--color-accent-blue);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    transform: translateX(5px);
}

.download-btn .btn-icon {
    font-size: 2rem;
}

.download-btn .btn-text {
    text-align: left;
}

.download-btn .btn-text small {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

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

.download-tips {
    padding: 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--color-border);
}

.download-tips h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-accent-blue);
}

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

.download-tips li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

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

.tutorial {
    background: var(--color-bg-secondary);
}

.tutorial-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.tutorial-card {
    position: relative;
    padding: 2rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.tutorial-card:hover {
    border-color: var(--color-accent-blue);
}

.tutorial-card:hover .card-glow {
    opacity: 1;
}

.tutorial-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

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

.tutorial-header h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
}

.tutorial-content {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

.tutorial-content p {
    margin-bottom: 1rem;
}

.tutorial-content ol,
.tutorial-content ul {
    padding-left: 1.25rem;
    margin-bottom: 1rem;
}

.tutorial-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.tutorial-link {
    display: inline-block;
    color: var(--color-accent-blue);
    font-weight: 500;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.tutorial-link:hover {
    color: var(--color-accent-purple);
}

.faq {
    background: var(--color-bg-primary);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--color-border);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    background: var(--color-bg-secondary);
    transition: all var(--transition-normal);
}

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

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

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-text-primary);
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-accent-blue);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--color-accent-blue);
    transition: transform var(--transition-normal);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.safety {
    background: var(--color-bg-secondary);
}

.safety-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: start;
}

.safety-image {
    position: sticky;
    top: 100px;
}

.safety-image img {
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.safety-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.safety-item {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.safety-item:hover {
    border-color: var(--color-accent-blue);
}

.safety-item.warning {
    border-color: var(--color-warning);
    background: rgba(240, 136, 62, 0.05);
}

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

.safety-text h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text-primary);
}

.safety-text p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.safety-disclaimer {
    margin-top: 3rem;
    padding: 1.5rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
}

.safety-disclaimer p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.news {
    background: var(--color-bg-primary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.news-card {
    padding: 2rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    transition: all var(--transition-normal);
}

.news-card:hover {
    border-color: var(--color-accent-blue);
    transform: translateY(-3px);
}

.news-date {
    font-size: 0.8rem;
    color: var(--color-accent-blue);
    margin-bottom: 0.75rem;
    font-family: var(--font-display);
}

.news-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
    line-height: 1.4;
}

.news-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

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

.about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}

.about-image img {
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.about-text .section-tag {
    margin-bottom: 1rem;
}

.about-text .section-title {
    text-align: left;
    margin-bottom: 1.5rem;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.badge-icon {
    font-size: 1.25rem;
}

.badge-text {
    font-size: 0.9rem;
    font-weight: 500;
}

.contact {
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.contact-info .section-tag {
    margin-bottom: 1rem;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 1.5rem;
}

.contact-info > p {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.contact-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-secondary);
}

.contact-feature .feature-icon {
    font-size: 1.25rem;
}

.contact-warning {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--color-warning);
}

.contact-image img {
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.footer {
    background: var(--color-bg-primary);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem 2rem;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-brand img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.footer-logo-text {
    display: block;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.footer-slogan {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.footer-nav {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-nav a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

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

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

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

.footer-info p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
}

.footer-info a {
    color: var(--color-accent-blue);
}

.copyright {
    font-size: 0.8rem !important;
}

.icp {
    font-size: 0.8rem !important;
}

.icp a {
    color: var(--color-text-muted) !important;
}

.icp a:hover {
    color: var(--color-text-secondary) !important;
}

.back-to-top {
    position: fixed;
    bottom: 110px;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    color: var(--color-accent-blue);
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--color-accent-blue);
    color: var(--color-bg-primary);
    box-shadow: var(--shadow-glow-blue);
}

@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .migration-steps {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .intro-grid,
    .download-content,
    .safety-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .intro-image,
    .download-showcase {
        order: -1;
    }
    
    .safety-image {
        position: relative;
        top: 0;
    }
    
    .tutorial-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: var(--color-bg-secondary);
        flex-direction: column;
        align-items: flex-start;
        padding: 5rem 2rem 2rem;
        gap: 1rem;
        transition: right var(--transition-normal);
        border-left: 1px solid var(--color-border);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu a {
        font-size: 1rem;
        padding: 0.75rem 0;
    }
    
    .nav-cta {
        margin-top: 1rem;
    }
    
    .section-container {
        padding: 4rem 1.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .migration-steps {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .footer-main {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .footer-nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .footer-bottom {
        flex-direction: column;
    }
    
    .footer-info {
        text-align: left;
    }
    
    .back-to-top {
        bottom: 110px;
        right: 1rem;
    }
    
    .phone-frame {
        width: 320px;
        height: 440px;
        border-radius: 24px;
        padding: 12px;
    }
    
    .phone-frame::before {
        width: 3px;
        height: 50px;
        left: 12px;
    }
    
    .phone-frame::after {
        width: 6px;
        height: 6px;
        top: 14px;
    }
    
    .phone-screen {
        border-radius: 14px;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .compare-table {
        font-size: 0.85rem;
    }
    
    .compare-table th,
    .compare-table td {
        padding: 0.75rem 1rem;
    }
}