:root {
    --red-50: #fef2f2;
    --red-100: #fee2e2;
    --red-200: #fecaca;
    --red-300: #fca5a5;
    --red-400: #f87171;
    --red-500: #ef4444;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    --red-800: #991b1b;
    --red-900: #7f1d1d;

    --primary: #c62828;
    --primary-light: #ef5350;
    --primary-dark: #8e0000;
    --primary-glow: rgba(198, 40, 40, 0.4);

    --navy-900: #0a0e1a;
    --navy-800: #0d1528;
    --navy-700: #111d35;
    --navy-600: #162447;
    --navy-500: #1b2d5b;

    --bg-primary: #0a0e1a;
    --bg-secondary: #0d1528;
    --bg-card: rgba(22, 36, 71, 0.4);
    --bg-card-hover: rgba(22, 36, 71, 0.65);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: rgba(148, 163, 184, 0.1);
    --border-hover: rgba(198, 40, 40, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(198, 40, 40, 0.15);

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--primary), #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(198, 40, 40, 0.12);
    border: 1px solid rgba(198, 40, 40, 0.25);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* ============ NAVBAR ============ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition-normal);
    background: transparent;
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    background: var(--primary);
    color: white;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-btn:hover {
    background: var(--primary-light);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ============ HERO ============ */

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

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.hero-glow {
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(198, 40, 40, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    animation: glowPulse 6s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.1); }
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(198, 40, 40, 0.1);
    border: 1px solid rgba(198, 40, 40, 0.2);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 520px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 20px rgba(198, 40, 40, 0.3);
}

.btn-primary:hover {
    background: var(--primary-light);
    box-shadow: 0 6px 30px rgba(198, 40, 40, 0.45);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(198, 40, 40, 0.08);
    color: var(--primary-light);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1.2s ease 0.3s both;
}

.hero-logo-wrap {
    position: relative;
    width: 400px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid;
}

.ring-1 {
    width: 100%;
    height: 100%;
    border-color: rgba(198, 40, 40, 0.1);
    animation: ringRotate 20s linear infinite;
}

.ring-2 {
    width: 80%;
    height: 80%;
    border-color: rgba(198, 40, 40, 0.15);
    border-style: dashed;
    animation: ringRotate 15s linear infinite reverse;
}

.ring-3 {
    width: 60%;
    height: 60%;
    border-color: rgba(198, 40, 40, 0.2);
    animation: ringRotate 10s linear infinite;
}

@keyframes ringRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-logo-img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    filter: drop-shadow(0 0 40px rgba(198, 40, 40, 0.3));
    animation: logoFloat 4s ease-in-out infinite;
    position: relative;
    z-index: 2;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero-wave {
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    z-index: 2;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: 80px;
}

/* ============ FEATURES ============ */

.features {
    padding: 100px 0;
    background: var(--bg-secondary);
    position: relative;
}

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

.feature-card {
    padding: 36px 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0;
    transition: var(--transition-normal);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(198, 40, 40, 0.1);
    border: 1px solid rgba(198, 40, 40, 0.2);
    border-radius: var(--radius-md);
    color: var(--primary-light);
    margin-bottom: 20px;
    transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
    background: rgba(198, 40, 40, 0.18);
    border-color: rgba(198, 40, 40, 0.35);
    box-shadow: 0 0 20px rgba(198, 40, 40, 0.15);
}

.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

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

/* ============ PRODUCT ============ */

.product {
    padding: 100px 0;
    background: var(--bg-primary);
}

.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.product-card-stack {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 40px;
}

.p-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    flex-wrap: wrap;
}

.p-card:hover {
    border-color: var(--border-hover);
    transform: translateX(8px);
    background: var(--bg-card-hover);
}

.p-card-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(198, 40, 40, 0.1);
    border-radius: var(--radius-sm);
    color: var(--primary-light);
    flex-shrink: 0;
}

.p-card-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.p-card-title {
    font-weight: 600;
    font-size: 0.95rem;
}

.p-card-status {
    font-size: 0.75rem;
    padding: 3px 10px;
    border-radius: 100px;
    font-weight: 500;
}

.p-card-status.active {
    background: rgba(34, 197, 94, 0.12);
    color: #4ade80;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.p-card-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 100px;
    overflow: hidden;
}

.p-card-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 100px;
    transition: width 1.5s ease;
}

.product-content .section-tag {
    margin-bottom: 16px;
}

.product-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.product-content > p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.product-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.product-list li {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 1rem;
    color: var(--text-secondary);
}

.check-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(198, 40, 40, 0.12);
    border-radius: 50%;
    color: var(--primary-light);
    flex-shrink: 0;
}

/* ============ ADVANTAGES ============ */

.advantages {
    padding: 100px 0;
    background: var(--bg-secondary);
}

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

.adv-card {
    padding: 40px 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.adv-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.adv-card.adv-main {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(198, 40, 40, 0.08), var(--bg-card));
    border-color: rgba(198, 40, 40, 0.15);
}

.adv-number {
    font-size: 3rem;
    font-weight: 900;
    color: rgba(198, 40, 40, 0.15);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -0.04em;
}

.adv-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.adv-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.adv-decoration {
    position: absolute;
    right: 40px;
    bottom: -20px;
    color: var(--primary-light);
    pointer-events: none;
}

/* ============ DOWNLOAD ============ */

.download {
    padding: 100px 0;
    background: var(--bg-primary);
}

.download-wrapper {
    position: relative;
    padding: 80px 60px;
    background: linear-gradient(135deg, rgba(198, 40, 40, 0.06), rgba(22, 36, 71, 0.5));
    border: 1px solid rgba(198, 40, 40, 0.15);
    border-radius: var(--radius-xl);
    overflow: hidden;
    text-align: center;
}

.download-bg-elements {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.dl-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(198, 40, 40, 0.08);
}

.dl-circle-1 {
    width: 400px;
    height: 400px;
    top: -150px;
    right: -100px;
}

.dl-circle-2 {
    width: 300px;
    height: 300px;
    bottom: -100px;
    left: -80px;
}

.dl-circle-3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.download-content {
    position: relative;
    z-index: 1;
}

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.download-content > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.dl-btn {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-normal);
    min-width: 200px;
}

.dl-btn:hover {
    border-color: var(--primary);
    background: rgba(198, 40, 40, 0.08);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(198, 40, 40, 0.15);
}

.dl-btn svg {
    flex-shrink: 0;
    opacity: 0.9;
}

.dl-btn-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.dl-btn-small {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.dl-btn-big {
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
}

/* ============ FOOTER ============ */

.footer {
    padding: 80px 0 40px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.footer-logo img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.footer-brand p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

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

/* ============ ANIMATIONS ============ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in-view {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in-view.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============ RESPONSIVE ============ */

@media (max-width: 1024px) {
    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-container {
        gap: 40px;
    }

    .hero-logo-wrap {
        width: 300px;
        height: 300px;
    }

    .hero-logo-img {
        width: 150px;
        height: 150px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-layout {
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-btn {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 14, 26, 0.95);
        backdrop-filter: blur(20px);
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-desc {
        margin: 0 auto 36px;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-logo-wrap {
        width: 250px;
        height: 250px;
    }

    .hero-logo-img {
        width: 120px;
        height: 120px;
    }

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

    .product-layout {
        grid-template-columns: 1fr;
    }

    .product-card-stack {
        padding: 20px 0;
    }

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

    .adv-card.adv-main {
        grid-column: auto;
    }

    .section-header h2,
    .product-content h2,
    .download-content h2 {
        font-size: 2rem;
    }

    .download-wrapper {
        padding: 48px 24px;
    }

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

    .dl-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
        align-items: center;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

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

    .btn {
        width: 100%;
        max-width: 260px;
        justify-content: center;
    }

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

/* ============ SUBPAGE STYLES ============ */

/* Page hero (subpage top banner) */
.page-hero {
    padding: 160px 0 80px;
    background: var(--bg-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -200px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(198, 40, 40, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-top: 16px;
    margin-bottom: 16px;
}

.page-hero > .container > p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

/* Features detail page */
.features-detail {
    padding: 60px 0 100px;
    background: var(--bg-secondary);
}

.fd-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

.fd-block:last-child {
    border-bottom: none;
}

.fd-block.fd-reverse {
    direction: rtl;
}

.fd-block.fd-reverse > * {
    direction: ltr;
}

.fd-number {
    font-size: 4rem;
    font-weight: 900;
    color: rgba(198, 40, 40, 0.12);
    line-height: 1;
    margin-bottom: 12px;
    letter-spacing: -0.04em;
}

.fd-content h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.fd-content > p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.fd-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.fd-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.fd-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--primary-light);
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 8px;
}

.fd-card-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Section CTA */
.section-cta {
    text-align: center;
    margin-top: 48px;
}

/* Product intro page */
.product-intro {
    padding: 60px 0 80px;
    background: var(--bg-secondary);
}

.pi-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.pi-visual {
    display: flex;
    justify-content: center;
}

.pi-content h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.pi-content p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* Workflow section */
.product-workflow {
    padding: 100px 0;
    background: var(--bg-primary);
}

.workflow-grid {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.wf-step {
    flex: 0 0 200px;
    text-align: center;
    padding: 32px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.wf-step:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    background: var(--bg-card-hover);
}

.wf-num {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 12px;
}

.wf-step h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.wf-step p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.wf-connector {
    display: flex;
    align-items: center;
    padding: 0 12px;
    margin-top: 50px;
}

/* Scenarios grid */
.product-scenarios {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.scenario-card {
    padding: 36px 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.scenario-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.scenario-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

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

/* About page */
.about-mission {
    padding: 60px 0 80px;
    background: var(--bg-secondary);
}

.am-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 24px;
}

.am-card {
    padding: 40px 36px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.am-card.am-main {
    grid-row: 1 / 3;
}

.am-card.am-main h2 {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.am-card.am-main p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.am-card:not(.am-main) {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

.am-stat {
    margin-bottom: 8px;
}

.am-stat .stat-num {
    font-size: 3rem;
}

.am-card:not(.am-main) p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.about-values {
    padding: 100px 0;
    background: var(--bg-primary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.value-card {
    padding: 36px 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.value-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.value-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

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

.about-tech {
    padding: 100px 0;
    background: var(--bg-secondary);
}

/* Download page */
.download-page {
    padding: 60px 0 80px;
    background: var(--bg-secondary);
}

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

.dp-card {
    padding: 48px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
}

.dp-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.dp-icon {
    color: var(--text-primary);
    margin-bottom: 24px;
    opacity: 0.85;
}

.dp-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.dp-version {
    font-size: 0.9rem;
    color: var(--primary-light);
    font-weight: 500;
    margin-bottom: 4px;
}

.dp-req {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.dp-btn {
    width: 100%;
    justify-content: center;
}

/* FAQ section */
.download-faq {
    padding: 100px 0;
    background: var(--bg-primary);
}

.faq-list {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

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

.faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    user-select: none;
    transition: var(--transition-fast);
}

.faq-q:hover {
    color: var(--primary-light);
}

.faq-q svg {
    flex-shrink: 0;
    transition: var(--transition-fast);
    color: var(--text-muted);
}

.faq-item.open .faq-q svg {
    transform: rotate(180deg);
    color: var(--primary-light);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 24px;
}

.faq-item.open .faq-a {
    max-height: 300px;
    padding: 0 24px 20px;
}

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

/* ============ SUBPAGE RESPONSIVE ============ */

@media (max-width: 1024px) {
    .fd-block {
        gap: 40px;
    }

    .workflow-grid {
        flex-wrap: wrap;
        gap: 16px;
    }

    .wf-connector {
        display: none;
    }

    .wf-step {
        flex: 0 0 calc(50% - 8px);
    }
}

@media (max-width: 768px) {
    .page-hero h1 {
        font-size: 2.2rem;
    }

    .fd-block,
    .fd-block.fd-reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .fd-block.fd-reverse > * {
        direction: ltr;
    }

    .pi-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .wf-step {
        flex: 0 0 100%;
    }

    .scenarios-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }

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

    .am-card.am-main {
        grid-row: auto;
    }

    .dp-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

/* Particle styles */
.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(198, 40, 40, 0.4);
    border-radius: 50%;
    pointer-events: none;
}

/* Mobile menu active state for toggle button */
.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

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