:root {
    --primary-color: #0066ff;
    --secondary-color: #667eea;
    --accent-color: #764ba2;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-light: #f8faff;
    --shadow: 0 4px 20px rgba(0, 102, 255, 0.1);
    --shadow-hover: 0 8px 30px rgba(0, 102, 255, 0.15);
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Navigation */
.navbar {
    background: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo h2 {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.5rem;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

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

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

.language-selector select {
    background: var(--bg-light);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    color: var(--text-color);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.language-selector select:hover {
    box-shadow: var(--shadow);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-light) 0%, #fff 100%);
    padding: 3rem 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Phone Mockup */
.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
    position: relative;
    margin: 0 auto;
    animation: float 6s ease-in-out infinite;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screen .screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 20px;
}

.app-interface {
    height: 100%;
    background: linear-gradient(to bottom, #f8faff 0%, #e8f0fe 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.camera-view {
    width: 80%;
    height: 200px;
    background: #ddd;
    border-radius: 15px;
    position: relative;
    overflow: hidden;
}

.camera-view::after {
    content: '📷';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    opacity: 0.5;
}

.translation-preview {
    width: 80%;
    height: 100px;
    background: var(--primary-color);
    border-radius: 15px;
    position: relative;
    overflow: hidden;
}

.translation-preview::after {
    content: '翻译结果';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: 600;
}

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

/* Features Section */
.features-preview {
    padding: 4rem 0;
    background: var(--bg-color);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-color);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 102, 255, 0.05);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Process Section */
.process {
    padding: 4rem 0;
    background: var(--bg-light);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
    box-shadow: var(--shadow);
}

.step h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--text-light);
}

/* Testimonials */
.testimonials {
    padding: 4rem 0;
    background: var(--bg-color);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.testimonial:hover {
    transform: translateY(-2px);
}

.testimonial p {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 1rem;
    font-style: italic;
}

.author {
    color: var(--text-light);
    font-weight: 500;
}

/* Download Section */
.download-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, rgba(0, 102, 255, 0.95), rgba(102, 126, 234, 0.95));
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="40" height="40" viewBox="0 0 40 40" xmlns="http://www.w3.org/2000/svg"><g fill="rgba(255,255,255,0.1)" fill-opacity="0.3"><circle cx="20" cy="20" r="2"/></g></svg>');
    background-size: 40px 40px;
    opacity: 0.3;
    z-index: 1;
}

.download-section .container {
    position: relative;
    z-index: 2;
}

.download-section .section-title {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    margin-bottom: 1.5rem;
}

.download-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    font-weight: 400;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.download-btn {
    display: block;
    transition: var(--transition);
}

.download-btn:hover {
    transform: translateY(-3px);
}

.download-btn img {
    height: 60px;
    width: auto;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: #ccc;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 1rem;
    text-align: center;
    color: #999;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
    }
    
    .process-steps {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
}

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

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

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation for cards */
.feature-card,
.testimonial,
.step {
    opacity: 0;
    animation: slideInUp 0.6s ease forwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }

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

/* Features Page Styles */
.page-header {
    background: linear-gradient(135deg, var(--bg-light) 0%, #fff 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.features-detailed {
    padding: 4rem 0;
}

.features-grid-detailed {
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

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

.feature-detailed.reverse {
    direction: rtl;
}

.feature-detailed.reverse > * {
    direction: ltr;
}

.feature-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.feature-icon-large {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.feature-content h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.feature-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 2rem;
}

.feature-points {
    list-style: none;
    padding: 0;
}

.feature-points li {
    padding: 0.5rem 0;
    color: var(--text-color);
    position: relative;
    padding-left: 2rem;
}

.feature-points li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Feature Demos */
.feature-demo {
    width: 200px;
    height: 350px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 25px;
    padding: 15px;
    position: relative;
}

.demo-screen {
    width: 100%;
    height: 100%;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.camera-interface {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.viewfinder {
    width: 120px;
    height: 80px;
    border: 3px dashed var(--primary-color);
    border-radius: 10px;
    background: rgba(0, 102, 255, 0.1);
}

.capture-btn {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    position: relative;
    cursor: pointer;
}

.capture-btn::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 40px;
    background: white;
    border-radius: 50%;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.privacy-demo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.device-outline {
    width: 150px;
    height: 200px;
    border: 3px solid var(--primary-color);
    border-radius: 20px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.processing-indicator {
    width: 80px;
    height: 80px;
    border: 4px solid rgba(0, 102, 255, 0.2);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 2s linear infinite;
}

.local-badge {
    position: absolute;
    bottom: 10px;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
}

.no-cloud {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

.cross {
    font-size: 2rem;
    color: #ff4444;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.offline-demo {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    text-align: center;
}

.phone-status {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.signal-bars {
    display: flex;
    gap: 3px;
}

.signal-bars::before {
    content: '📶';
    font-size: 2rem;
    filter: grayscale(1);
    opacity: 0.3;
}

.signal-bars.offline::after {
    content: '❌';
    position: absolute;
    margin-left: -1rem;
    margin-top: -0.5rem;
}

.status-text {
    font-size: 0.9rem;
    color: #ff4444;
    font-weight: 600;
}

.app-working {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.working-indicator {
    width: 40px;
    height: 40px;
    background: #22c55e;
    border-radius: 50%;
    position: relative;
}

.working-indicator::after {
    content: '✓';
    position: absolute;
    color: white;
    font-weight: bold;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.working-text {
    font-size: 0.9rem;
    color: #22c55e;
    font-weight: 600;
}

.language-demo {
    display: flex;
    justify-content: center;
}

.language-wheel {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    text-align: center;
}

.lang-item {
    background: var(--bg-light);
    padding: 0.75rem;
    border-radius: 10px;
    font-weight: 500;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-size: 0.9rem;
}

.restoration-demo {
    display: flex;
    justify-content: center;
}

.before-after {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.image-before,
.image-after {
    width: 80px;
    height: 60px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: white;
}

.image-before {
    background: #6b7280;
}

.image-after {
    background: var(--primary-color);
}

.arrow {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.performance-demo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.speed-meter {
    position: relative;
    width: 120px;
    height: 120px;
    border: 6px solid #e5e7eb;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.speed-meter::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 25%;
    width: 50%;
    height: 6px;
    background: linear-gradient(90deg, #22c55e, #facc15, #ef4444);
    border-radius: 3px;
}

.speed-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.optimization-badges {
    display: flex;
    gap: 0.5rem;
}

.badge {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Comparison Section */
.comparison {
    padding: 4rem 0;
    background: var(--bg-light);
}

.comparison-table {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-top: 3rem;
}

.comparison-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

.comparison-header > div {
    padding: 1.5rem;
    text-align: center;
}

.comparison-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    border-bottom: 1px solid #e5e7eb;
}

.comparison-row:last-child {
    border-bottom: none;
}

.feature-name {
    padding: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    background: var(--bg-light);
}

.feature-value {
    padding: 1.5rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.feature-value span {
    font-size: 0.9rem;
}

.cta-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    text-align: center;
    color: white;
}

.cta-section .section-title {
    color: white;
}

.cta-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

/* Active navigation link */
.nav-link.active {
    color: var(--primary-color);
}

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

/* Responsive design for features page */
@media (max-width: 768px) {
    .page-title {
        font-size: 2rem;
    }
    
    .feature-detailed {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .feature-detailed.reverse {
        direction: ltr;
    }
    
    .comparison-header,
    .comparison-row {
        grid-template-columns: 1fr;
    }
    
    .comparison-header > div:first-child,
    .comparison-row .feature-name {
        display: none;
    }
    
    .comparison-table {
        margin-top: 2rem;
    }
}

/* Download Page Styles */
.download-hero {
    background: linear-gradient(135deg, var(--bg-light) 0%, #fff 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}

.download-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.download-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 4rem;
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    max-width: 800px;
    margin: 0 auto;
}

.download-card {
    background: white;
    padding: 3rem 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

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

.download-card.recommended {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #f8faff 0%, #e8f0fe 100%);
}

.platform-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.download-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.requirements {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
}

.requirements p {
    font-size: 0.9rem;
    color: var(--text-color);
    margin: 0;
}

.download-btn-card {
    display: block;
    margin: 2rem 0;
    transition: var(--transition);
}

.download-btn-card:hover {
    transform: scale(1.05);
}

.download-btn-card img {
    height: 60px;
    width: auto;
}

.features-list ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

.features-list li {
    padding: 0.5rem 0;
    color: var(--text-color);
    position: relative;
    padding-left: 1.5rem;
}

.features-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.recommendation-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Installation Guide */
.installation-guide {
    padding: 4rem 0;
    background: var(--bg-color);
}

.guide-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 3rem;
}

.tab-btn {
    flex: 1;
    padding: 1rem 2rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

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

.tab-content {
    display: none;
    max-width: 600px;
    margin: 0 auto;
}

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

.installation-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    flex-shrink: 0;
}

.step-text h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.step-text p {
    color: var(--text-light);
    margin: 0;
}

/* System Requirements */
.system-requirements {
    padding: 4rem 0;
    background: var(--bg-light);
}

.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.requirement-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.requirement-card h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.requirement-card ul {
    list-style: none;
    padding: 0;
}

.requirement-card li {
    padding: 0.75rem 0;
    color: var(--text-color);
    position: relative;
    padding-left: 2rem;
    border-bottom: 1px solid #f0f0f0;
}

.requirement-card li:last-child {
    border-bottom: none;
}

.requirement-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* FAQ Section */
.download-faq {
    padding: 4rem 0;
    background: var(--bg-color);
}

.faq-list {
    max-width: 800px;
    margin: 3rem auto 0;
}

.faq-item {
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow);
}

.faq-question {
    padding: 1.5rem 2rem;
    background: var(--bg-light);
    color: var(--text-color);
    font-weight: 600;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-answer {
    padding: 0 2rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    background: white;
}

.faq-item.active .faq-answer {
    padding: 1.5rem 2rem;
    max-height: 200px;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

/* Alternative Download */
.alternative-download {
    padding: 4rem 0;
    background: var(--bg-light);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

.alternative-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.option-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.option-card:hover {
    transform: translateY(-3px);
}

.option-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.option-card h3 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.option-card p {
    color: var(--text-light);
    margin-bottom: 2rem;
}

.qr-code {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    background: var(--bg-light);
    border: 2px dashed var(--primary-color);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.qr-text {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0;
}

/* Responsive design for download page */
@media (max-width: 768px) {
    .download-title {
        font-size: 2.5rem;
    }
    
    .download-cards {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .download-card {
        padding: 2rem 1.5rem;
    }
    
    .guide-tabs {
        flex-direction: column;
        max-width: 300px;
    }
    
    .step-item {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .requirements-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .alternative-options {
        grid-template-columns: 1fr;
    }
    
    .faq-question,
    .faq-answer {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

/* Legal Page Styles */
.legal-hero {
    background: linear-gradient(135deg, var(--bg-light) 0%, #fff 100%);
    padding: 4rem 0 2rem;
    text-align: center;
}

.legal-nav {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 80px;
    z-index: 100;
    padding: 1rem 0;
}

.legal-menu {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.legal-nav-link {
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.legal-nav-link.active,
.legal-nav-link:hover {
    color: var(--primary-color);
    background: var(--bg-light);
}

.legal-section {
    padding: 4rem 0;
}

.legal-section:nth-child(even) {
    background: var(--bg-light);
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-content h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.last-updated {
    color: var(--text-light);
    font-style: italic;
    margin-bottom: 3rem;
}

.legal-text {
    line-height: 1.8;
    color: var(--text-color);
}

.legal-text h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin: 2.5rem 0 1rem;
    font-weight: 600;
}

.legal-text p {
    margin-bottom: 1.5rem;
}

.legal-text ul {
    margin: 1rem 0 2rem 2rem;
}

.legal-text li {
    margin-bottom: 0.5rem;
}

/* About Page Styles */
.about-hero {
    background: linear-gradient(135deg, var(--bg-light) 0%, #fff 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}

.mission {
    padding: 4rem 0;
    background: var(--bg-color);
}

.mission-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.mission-text h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: 2rem;
}

.mission-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.mission-visual {
    position: relative;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.globe-icon {
    font-size: 6rem;
    position: relative;
    z-index: 2;
}

.connection-lines {
    position: absolute;
    width: 100%;
    height: 100%;
}

.line {
    position: absolute;
    width: 2px;
    background: var(--primary-color);
    opacity: 0.3;
    animation: pulse 2s infinite;
}

.line-1 {
    height: 100px;
    top: 20%;
    left: 30%;
    transform: rotate(45deg);
}

.line-2 {
    height: 120px;
    top: 10%;
    right: 25%;
    transform: rotate(-30deg);
}

.line-3 {
    height: 80px;
    bottom: 30%;
    left: 20%;
    transform: rotate(75deg);
}

.language-bubbles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.bubble {
    position: absolute;
    background: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    animation: float 3s ease-in-out infinite;
}

.bubble:nth-child(1) {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.bubble:nth-child(2) {
    top: 10%;
    right: 10%;
    animation-delay: 0.5s;
}

.bubble:nth-child(3) {
    bottom: 30%;
    left: 5%;
    animation-delay: 1s;
}

.bubble:nth-child(4) {
    bottom: 10%;
    right: 15%;
    animation-delay: 1.5s;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

.values {
    padding: 4rem 0;
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.value-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-5px);
}

.value-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.value-card h3 {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--text-light);
    line-height: 1.6;
}

.story {
    padding: 4rem 0;
    background: var(--bg-color);
}

.story-timeline {
    margin-top: 3rem;
    position: relative;
}

.story-timeline::before {
    content: '';
    position: absolute;
    left: 2rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-color);
    opacity: 0.3;
}

.timeline-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-date {
    flex-shrink: 0;
    width: 4rem;
    font-weight: 600;
    color: var(--primary-color);
    position: relative;
}

.timeline-date::after {
    content: '';
    position: absolute;
    right: -1.5rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
}

.timeline-content {
    flex: 1;
}

.timeline-content h4 {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-light);
    line-height: 1.6;
}

.technology {
    padding: 4rem 0;
    background: var(--bg-light);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.tech-item {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-3px);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.tech-item h3 {
    font-size: 1.25rem;
    color: var(--text-color);
    margin-bottom: 1rem;
}

.tech-item p {
    color: var(--text-light);
    line-height: 1.6;
}

.team {
    padding: 4rem 0;
    background: var(--bg-color);
}

.team-content {
    max-width: 800px;
    margin: 0 auto 4rem;
    text-align: center;
}

.team-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.team-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

.future {
    padding: 4rem 0;
    background: var(--bg-light);
}

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

.future-content p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.future-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.future-item {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.future-item:hover {
    transform: translateY(-3px);
}

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

.future-item h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.future-item p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin: 0;
}

.contact-section {
    padding: 4rem 0;
    background: var(--bg-color);
}

.contact-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.contact-item {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.contact-item:hover {
    transform: translateY(-3px);
}

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

.contact-item h4 {
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--primary-color);
    font-weight: 500;
    margin: 0;
}

/* Responsive design for legal and about pages */
@media (max-width: 768px) {
    .mission-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .mission-visual {
        height: 200px;
    }
    
    .globe-icon {
        font-size: 4rem;
    }
    
    .legal-menu {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .timeline-item {
        flex-direction: column;
        gap: 1rem;
    }
    
    .story-timeline::before {
        display: none;
    }
    
    .timeline-date::after {
        display: none;
    }
    
    .team-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}