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

:root {
    --primary-color: #007aff;
    --secondary-color: #a78bfa;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2d2d2d;
    --border-color: #3a3a3c;
    --accent-color: #a78bfa;
    --success-color: #34c759;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

.announcement-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.announcement-bar p {
    flex: 1;
    text-align: center;
}

.announcement-bar a {
    color: var(--accent-color);
    text-decoration: none;
    margin-right: 20px;
    transition: opacity 0.3s;
}

.announcement-bar a:hover {
    opacity: 0.8;
}

.header {
    position: sticky;
    top: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 16px 0;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 16px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo svg {
    width: 32px;
    height: 32px;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
    padding: 0;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
}

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

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
    flex: 1;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

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

.nav-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.language-selector,
.cart-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.language-selector:hover,
.cart-icon:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.hero-section {
    padding: 80px 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

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

.badge {
    display: inline-block;
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 32px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-color) 0%, #667eea 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rating {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.stars {
    font-size: 20px;
    color: #ffd700;
}

.trust-text {
    color: var(--text-secondary);
    font-size: 14px;
}

.description {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.secondary-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 9/19;
    position: relative;
}

.mockup-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 40px;
    border: 12px solid #1a1a1a;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
    position: relative;
    animation: float 6s ease-in-out infinite;
}

.mockup-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 25px;
    background: #1a1a1a;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.download-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.download-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.3s;
    cursor: pointer;
}

.download-card:hover {
    border-color: var(--accent-color);
    background: rgba(167, 139, 250, 0.05);
    transform: translateY(-4px);
}

.os-icon {
    width: 40px;
    height: 40px;
    color: var(--accent-color);
    flex-shrink: 0;
}

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

.os-name {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.os-type {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.features-section {
    padding: 80px 0;
}

.features-section h2 {
    font-size: 40px;
    text-align: center;
    margin-bottom: 60px;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-8px);
    background: rgba(167, 139, 250, 0.05);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.education-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.education-section h2 {
    font-size: 40px;
    text-align: center;
    margin-bottom: 16px;
    font-weight: 700;
}

.section-intro {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 60px;
    font-size: 16px;
}

.education-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.edu-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 28px;
    transition: all 0.3s;
}

.edu-card:hover {
    border-color: var(--accent-color);
    background: rgba(167, 139, 250, 0.08);
}

.edu-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--accent-color);
    font-weight: 600;
}

.edu-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

.comparison-section {
    padding: 80px 0;
}

.comparison-section h2 {
    font-size: 40px;
    text-align: center;
    margin-bottom: 60px;
    font-weight: 700;
}

.comparison-wrapper {
    overflow-x: auto;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    padding: 20px;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.comparison-table th,
.comparison-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--bg-tertiary);
    font-weight: 700;
    color: var(--text-primary);
}

.comparison-table th.highlight {
    background: rgba(167, 139, 250, 0.1);
    color: var(--accent-color);
}

.comparison-table td.feature-name {
    font-weight: 600;
    color: var(--accent-color);
    width: 200px;
}

.comparison-table td.highlight {
    background: rgba(167, 139, 250, 0.05);
    color: var(--accent-color);
    font-weight: 600;
}

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

.faq-section {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.faq-section h2 {
    font-size: 40px;
    text-align: center;
    margin-bottom: 60px;
    font-weight: 700;
}

.faq-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.faq-item {
    margin-bottom: 32px;
}

.faq-item h3 {
    font-size: 16px;
    margin-bottom: 12px;
    color: var(--text-primary);
    font-weight: 600;
}

.faq-item p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

.cta-section {
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 40px;
    margin-bottom: 16px;
    font-weight: 700;
}

.cta-section p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-color) 0%, #667eea 100%);
    color: var(--text-primary);
    padding: 16px 48px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(167, 139, 250, 0.3);
}

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 24px;
}

.footer-logo svg {
    width: 24px;
    height: 24px;
}

.language-selector-footer {
    margin-bottom: 24px;
}

.language-selector-footer button {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
}

.language-selector-footer button:hover {
    border-color: var(--accent-color);
}

.address {
    margin-bottom: 24px;
}

.address p {
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 12px;
}

.payment-methods {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-secondary);
}

@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 48px;
    }

    .download-grid {
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    }

    .faq-columns {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .education-cards {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, 0.98);
        flex-direction: column;
        padding: 20px;
        transform: translateX(100%);
        transition: transform 0.3s;
        border-top: 1px solid var(--border-color);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-right {
        display: none;
    }

    .announcement-bar {
        flex-direction: column;
        gap: 12px;
    }

    .announcement-bar a {
        margin-right: 0;
    }

    .hero-section {
        padding: 60px 0;
        min-height: auto;
    }

    .hero-text h1 {
        font-size: 36px;
    }

    .hero-text {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

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

    .education-cards {
        grid-template-columns: 1fr;
    }

    .comparison-wrapper {
        overflow-x: auto;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 12px 8px;
        font-size: 12px;
    }

    .download-card {
        padding: 16px;
    }

    .cta-section h2 {
        font-size: 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .announcement-bar {
        font-size: 12px;
        padding: 8px 0;
    }

    .navbar {
        gap: 16px;
    }

    .logo {
        font-size: 14px;
    }

    .hero-text h1 {
        font-size: 28px;
        margin-bottom: 20px;
    }

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

    .rating {
        justify-content: center;
    }

    .description {
        font-size: 15px;
    }

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

    .download-card {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

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

    .features-section h2,
    .education-section h2,
    .comparison-section h2,
    .faq-section h2,
    .cta-section h2 {
        font-size: 28px;
        margin-bottom: 40px;
    }

    .feature-card,
    .edu-card {
        padding: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    .payment-methods {
        justify-content: center;
    }

    .faq-item {
        margin-bottom: 24px;
    }
}