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

:root {
    --primary-color: #000000;
    --secondary-color: #333333;
    --text-color: #1a1a1a;
    --text-light: #666666;
    --text-lighter: #999999;
    --bg-color: #ffffff;
    --bg-alt: #fafafa;
    --bg-dark: #0a0a0a;
    --border-color: #e5e5e5;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        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-color: var(--bg-color);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-brand {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: -0.02em;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand-icon {
    height: 42px;
    width: 42px;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
}

.nav-brand-text {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
    line-height: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    font-size: 0.95rem;
    transition: color 0.2s;
    letter-spacing: -0.01em;
}

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

.nav-download {
    background-color: var(--primary-color);
    color: white !important;
    padding: 8px 20px;
    border-radius: 4px;
    font-weight: 500 !important;
}

.nav-download:hover {
    background-color: var(--secondary-color);
    color: white !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all 0.3s;
}

/* Hero Section */
.hero {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 160px 0 120px;
    text-align: center;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
    line-height: 1.1;
    animation: fadeInUp 0.8s ease-out;
    color: var(--text-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-weight: 400;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 3rem;
    color: var(--text-lighter);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.btn {
    padding: 14px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-block;
    border: none;
    font-size: 1rem;
    cursor: pointer;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
}

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

.section-alt {
    background-color: var(--bg-alt);
}

.section-title {
    font-size: 2.75rem;
    text-align: center;
    margin-bottom: 4rem;
    color: var(--text-color);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

/* Feature Blocks */
.feature-blocks {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-block {
    text-align: left;
}

.feature-block h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.feature-block p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-item {
    text-align: center;
    padding: 2rem 1rem;
}

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

.feature-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    letter-spacing: -0.01em;
}

.feature-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Capabilities Section */
.capabilities-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    max-width: 900px;
    margin: 0 auto;
}

.capability-list {
    list-style: none;
}

.capability-list li {
    padding: 0.75rem 0;
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
    border-bottom: 1px solid var(--border-color);
}

.capability-list li:last-child {
    border-bottom: none;
}

/* Technology Section */
.tech-content {
    max-width: 1000px;
    margin: 0 auto;
}

.tech-intro {
    margin-bottom: 3rem;
}

.tech-intro h3 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
    letter-spacing: -0.01em;
}

.tech-intro p {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.tech-comparison {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.comparison-item {
    padding: 1.5rem;
    background-color: var(--bg-alt);
    border-radius: 8px;
}

.comparison-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.comparison-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.tech-features {
    margin-top: 3rem;
}

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

.tech-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.tech-list li {
    padding: 0.75rem 0;
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
    padding-left: 1.5rem;
    position: relative;
}

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

/* Gallery Section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.gallery-placeholder {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #f5f5f5 0%, #e0e0e0 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--text-lighter);
    font-size: 1.1rem;
    border: 1px solid var(--border-color);
}

.gallery-caption {
    color: var(--text-light);
    font-size: 0.95rem;
}

.gallery-note {
    text-align: center;
    color: var(--text-lighter);
    font-size: 0.9rem;
    font-style: italic;
    margin-top: 2rem;
}

.section-intro {
    text-align: center;
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: -2rem auto 3rem;
    line-height: 1.7;
}

.gallery-preview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.gallery-cta-link {
    text-align: center;
    margin-top: 2rem;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.pricing-card.featured {
    border-color: var(--primary-color);
    border-width: 2px;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: white;
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

.pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 2rem;
}

.pricing-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-light);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: 2rem;
    min-height: 200px;
}

.pricing-features li {
    padding: 0.75rem 0;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
    padding-left: 1.5rem;
    position: relative;
}

.pricing-features li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.pricing-card .btn {
    width: 100%;
}

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

.btn-secondary:hover {
    background-color: var(--bg-alt);
    border-color: var(--text-light);
}

/* Download Section */
.download-section {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.system-requirements {
    text-align: left;
    background-color: var(--bg-alt);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.system-requirements h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.requirements-list {
    list-style: none;
}

.requirements-list li {
    padding: 0.5rem 0;
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
}

.requirements-list strong {
    color: var(--text-color);
    font-weight: 600;
}

.download-buttons {
    margin: 2rem 0;
}

.download-option {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    transition: box-shadow 0.3s;
}

.download-option:hover {
    box-shadow: var(--shadow-lg);
}

.download-option h4 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.version-info {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.file-size {
    margin-top: 1rem;
    color: var(--text-lighter);
    font-size: 0.9rem;
}

.download-links {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.download-links h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.download-list {
    list-style: none;
    text-align: left;
    max-width: 400px;
    margin: 0 auto;
}

.download-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.download-list li:last-child {
    border-bottom: none;
}

.download-list a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.download-list a:hover {
    color: var(--primary-color);
}

.download-note {
    margin-top: 2rem;
    font-size: 0.9rem;
    color: var(--text-lighter);
}

.download-note a {
    color: var(--text-light);
    text-decoration: underline;
}

.download-note a:hover {
    color: var(--text-color);
}

.download-intro {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.download-cta {
    margin: 2rem 0;
}


/* Footer */
.footer {
    background-color: var(--bg-color);
    color: var(--text-light);
    padding: 4rem 0 3rem;
    border-top: 1px solid var(--border-color);
}

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

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

.footer-links span {
    color: var(--text-lighter);
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--text-lighter);
    margin-top: 1rem;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-color);
        width: 100%;
        text-align: center;
        transition: left 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .feature-blocks {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .capabilities-list {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero {
        padding: 100px 0 80px;
    }

    .nav-menu {
        gap: 1.5rem;
    }

    .nav-menu a {
        font-size: 0.85rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .tech-comparison {
        grid-template-columns: 1fr;
    }

    .tech-list {
        grid-template-columns: 1fr;
    }

    .gallery-grid,
    .gallery-preview {
        grid-template-columns: 1fr;
    }

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