/* ============================================
   芝麻福 AI — 官网样式
   ============================================ */

/* ---------- 1. Design Tokens ---------- */
:root {
    --color-bg-dark: #030712;
    --color-bg-section: #f8fafc;
    --color-bg-white: #ffffff;
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-accent: #8b5cf6;
    --color-gold: #f59e0b;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Microsoft YaHei', sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 40px rgba(59,130,246,0.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 2. Base & Reset ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg-white);
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

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

/* ---------- 3. Typography ---------- */
.section-label {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.section-title {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-text);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--color-text-muted);
    max-width: 640px;
    margin: 0 auto 64px;
    line-height: 1.7;
}

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

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

/* ---------- 4. Components ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 15px;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.btn-lg { padding: 18px 40px; font-size: 16px; }

.btn-primary {
    background: var(--color-primary);
    color: white;
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(37,99,235,0.35);
}

.btn-ghost {
    background: transparent;
    color: white;
    border: 1.5px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: white;
}

.badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.badge-gold {
    background: linear-gradient(135deg, var(--color-gold), #d97706);
    color: #000;
}

/* ---------- 5. Navigation ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 24px;
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(3,7,18,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 900;
    font-size: 18px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-brand {
    font-size: 18px;
    font-weight: 800;
    color: white;
    line-height: 1.2;
}

.logo-tagline {
    font-size: 11px;
    color: var(--color-text-light);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
    transition: color var(--transition);
    position: relative;
}

.nav-menu a:hover {
    color: white;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary-light);
    transition: width var(--transition);
}

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

.nav-cta {
    padding: 10px 24px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition);
}

.nav-cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: all var(--transition);
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ---------- 6. Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-dark);
    overflow: hidden;
    padding: 120px 0 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(37,99,235,0.15) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 50%, rgba(139,92,246,0.1) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 20% 80%, rgba(37,99,235,0.08) 0%, transparent 60%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(37,99,235,0.15);
    border: 1px solid rgba(37,99,235,0.3);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary-light);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    color: white;
    margin-bottom: 24px;
    letter-spacing: -1px;
    animation: fadeInUp 0.8s ease 0.1s backwards;
}

.hero-desc {
    font-size: 19px;
    color: rgba(255,255,255,0.6);
    max-width: 640px;
    margin: 0 auto 48px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 80px;
    animation: fadeInUp 0.8s ease 0.3s backwards;
}

.hero-metrics {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.metric { text-align: center; }

.metric-value {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: white;
    line-height: 1.2;
}

.metric-label {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    margin-top: 4px;
}

.metric-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.1);
}

/* ---------- 7. Trust Strip ---------- */
.trust-strip {
    background: #0a0f1e;
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding: 48px 0;
}

.trust-items {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 16px;
    color: white;
}

.trust-icon {
    width: 48px;
    height: 48px;
    background: rgba(37,99,235,0.1);
    border: 1px solid rgba(37,99,235,0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.trust-item strong {
    display: block;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 2px;
}

.trust-item span {
    font-size: 12px;
    color: var(--color-text-light);
}

/* ---------- 8. Features ---------- */
.features {
    padding: 120px 0;
    background: var(--color-bg-white);
}

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

.feature-card {
    background: var(--color-bg-section);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 0;
    transition: opacity var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.feature-icon-wrap {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(139,92,246,0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.feature-card p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

.feature-card-highlight {
    background: linear-gradient(135deg, #1e3a8a, #2563eb);
    border-color: transparent;
    grid-column: 1 / -1;
}

.feature-card-highlight .feature-icon-wrap {
    background: rgba(255,255,255,0.15);
}

.feature-card-highlight h3 {
    color: #ffffff;
    font-size: 24px;
}

.feature-card-highlight p {
    color: rgba(255,255,255,0.8);
    font-size: 16px;
}

.feature-card-highlight:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(37,99,235,0.3);
}

/* ---------- Workflow Overview Cards ---------- */
.workflow-overview {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

@media (max-width: 768px) {
    .workflow-overview {
        grid-template-columns: 1fr;
    }
}

.workflow-card {
    position: relative;
    background: var(--color-bg-section);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px 32px 32px;
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
    overflow: hidden;
}

.workflow-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 50px rgba(37,99,235,0.12);
}

.workflow-num {
    position: absolute;
    top: 16px;
    left: 20px;
    width: 28px;
    height: 28px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

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

.workflow-card h3 {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 8px;
    color: var(--color-text);
}

.workflow-tagline {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.workflow-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.workflow-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary);
    transition: color var(--transition);
}

.workflow-card:hover .workflow-link {
    color: var(--color-primary-dark);
}

.feature-tag {
    display: inline-block;
    margin-top: 16px;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.tag-pro {
    background: rgba(245,158,11,0.1);
    color: #d97706;
}

.tag-new {
    background: rgba(16,185,129,0.1);
    color: #059669;
}

/* ---------- 9. Editions ---------- */
.editions {
    padding: 120px 0;
    background: var(--color-bg-section);
}

.shared-features {
    max-width: 800px;
    margin: 0 auto 48px;
    text-align: center;
}

.shared-features h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.shared-features-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px 24px;
}

.shared-features-list span {
    font-size: 15px;
    color: var(--color-text-secondary);
    background: white;
    border: 1px solid var(--color-border);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}

.editions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 960px;
    margin: 0 auto;
}

.edition-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 48px 40px;
    transition: all var(--transition);
    position: relative;
}

.edition-card:hover {
    box-shadow: var(--shadow-lg);
}

.edition-card.pro {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.edition-card.pro .edition-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: 6px 24px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
}

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

.edition-name {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 8px;
}

.edition-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

.edition-trial {
    text-align: center;
    margin-top: 8px;
}

.trial-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: 10px 28px;
    border-radius: 24px;
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.trial-note {
    font-size: 13px;
    color: var(--color-text-light);
    margin-top: 10px;
}

.edition-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 36px;
}

.edition-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15px;
    color: var(--color-text-secondary);
}

.edition-features .check {
    color: var(--color-success);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.edition-cta {
    display: block;
    text-align: center;
}

.edition-cta .btn {
    width: 100%;
}

/* ---------- 10. Sports ---------- */
.sports {
    padding: 120px 0;
    background: var(--color-bg-white);
}

.sports-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.sport-card {
    background: var(--color-bg-section);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 24px;
    text-align: center;
    transition: all var(--transition);
}

.sport-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.sport-emoji {
    font-size: 52px;
    margin-bottom: 16px;
    display: block;
}

.sport-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.sport-card p {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.sport-status {
    display: inline-block;
    margin-top: 12px;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status-live {
    background: rgba(16,185,129,0.1);
    color: #059669;
}

.status-soon {
    background: rgba(245,158,11,0.1);
    color: #d97706;
}

/* ---------- 11. Demo ---------- */
.demo {
    padding: 120px 0;
    background: var(--color-bg-section);
}

.demo-intro {
    text-align: center;
    margin-bottom: 64px;
}

.demo-intro .image-container {
    max-width: 900px;
    margin: 0 auto;
}

.demo-intro .image-container img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.demo-steps-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 48px;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 80px;
}

.step-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: all var(--transition);
}

.step-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.step-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.step-num {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    flex-shrink: 0;
}

.step-head h4 {
    font-size: 18px;
    font-weight: 700;
}

.step-body { text-align: center; }

.step-body img {
    width: 100%;
    max-width: 480px;
    margin: 0 auto 16px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.step-body p {
    font-size: 14px;
    color: var(--color-text-muted);
}

.comparison-title {
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
}

.comparison-sub {
    font-size: 15px;
    color: var(--color-text-muted);
    text-align: center;
    margin-bottom: 40px;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.video-item h5 {
    text-align: center;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.video-item video {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* ---------- 12. Downloads ---------- */
.downloads {
    padding: 120px 0;
    background: var(--color-bg-white);
}

.downloads-notice {
    max-width: 800px;
    margin: 0 auto 56px;
    background: linear-gradient(135deg, rgba(37,99,235,0.05), rgba(139,92,246,0.05));
    border: 1px solid rgba(37,99,235,0.15);
    border-radius: var(--radius-md);
    padding: 24px 32px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.downloads-notice .notice-icon {
    font-size: 24px;
    flex-shrink: 0;
}

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

.download-group {
    margin-bottom: 48px;
}

.download-group-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.download-group-title .emoji {
    font-size: 32px;
}

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

.download-card {
    background: var(--color-bg-section);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition);
}

.download-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.download-card .dl-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 16px;
}

.dl-badge-personal {
    background: rgba(16,185,129,0.1);
    color: #059669;
}

.dl-badge-pro {
    background: rgba(37,99,235,0.1);
    color: var(--color-primary);
}

.download-card h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-card .dl-desc {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    line-height: 1.6;
}

.dl-meta {
    background: var(--color-bg-white);
    padding: 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--color-text-secondary);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 15px;
    transition: all var(--transition);
}

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

.download-btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37,99,235,0.3);
}

.download-btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

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

.download-btn-disabled {
    background: var(--color-border);
    color: var(--color-text-light);
    cursor: not-allowed;
}

/* ---------- 13. Install ---------- */
.install {
    padding: 120px 0;
    background: var(--color-bg-section);
}

.install-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
}

.sys-req {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.sys-req h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.sys-req li {
    padding: 14px 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 15px;
}

.sys-req li:last-child { border-bottom: none; }

.install-steps h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
}

.install-step {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 28px;
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.install-step .i-num {
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.install-step h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 6px;
}

.install-step p {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ---------- 14. Community ---------- */
.community {
    padding: 120px 0;
    background: var(--color-bg-dark);
    color: white;
    position: relative;
    overflow: hidden;
}

.community::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37,99,235,0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.community .container { position: relative; z-index: 1; }

.community .section-title { color: white; }
.community .section-subtitle { color: rgba(255,255,255,0.5); }

.community-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}

.community-text h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.4;
}

.community-text p {
    color: rgba(255,255,255,0.6);
    line-height: 1.8;
    margin-bottom: 24px;
    font-size: 16px;
}

.community-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 28px;
}

.community-list li {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    gap: 12px;
}

.community-reward {
    background: rgba(37,99,235,0.15);
    border: 1px solid rgba(37,99,235,0.25);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin-bottom: 20px;
}

.community-reward p {
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    margin: 0;
}

.community-note {
    font-size: 14px;
    color: rgba(255,255,255,0.4);
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 16px;
}

.community-contacts {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    padding: 32px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.contact-card-light {
    background: white;
    color: var(--color-text);
}

.contact-card-dark {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    color: white;
}

.contact-card .c-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.contact-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
}

.contact-card a {
    color: var(--color-primary);
    font-weight: 600;
    word-break: break-all;
}

.contact-card img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-sm);
    margin: 0 auto;
    border: 3px solid rgba(255,255,255,0.2);
}

.contact-card .c-note {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 10px;
}

/* ---------- 15. Footer ---------- */
.footer {
    background: #060a14;
    padding: 64px 0 32px;
    border-top: 1px solid rgba(255,255,255,0.05);
}

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

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--color-text-light);
    font-size: 14px;
    line-height: 1.6;
    max-width: 320px;
}

.footer h4 {
    color: white;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.footer-links a {
    display: block;
    color: var(--color-text-light);
    font-size: 14px;
    padding: 6px 0;
    transition: color var(--transition);
}

.footer-links a:hover { color: white; }

.footer-contact p {
    color: var(--color-text-light);
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 24px;
    text-align: center;
    color: var(--color-text-light);
    font-size: 13px;
}

/* ---------- 16. Scroll-to-top ---------- */
.scroll-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    display: none;
    transition: all var(--transition);
    z-index: 999;
    box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.scroll-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

/* ---------- 17. Animations ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: all 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.revealed {
    opacity: 1;
    transform: none;
}

/* ---------- 18. Responsive ---------- */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .sports-grid { grid-template-columns: repeat(3, 1fr); }
    .editions-grid { max-width: 100%; }
    .community-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .nav-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(3,7,18,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .nav-menu.active { display: flex; }
    .nav-menu li a {
        display: block;
        padding: 14px 0;
        border-bottom: 1px solid rgba(255,255,255,0.05);
        font-size: 16px;
    }
    .nav-cta { display: none; }

    .hero { padding: 100px 0 60px; min-height: auto; }
    .hero-title { font-size: 40px; }
    .hero-desc { font-size: 16px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-metrics { flex-wrap: wrap; gap: 24px; }
    .hero-metrics .metric-divider { display: none; }

    .section-title { font-size: 32px; }
    .section-subtitle { font-size: 16px; margin-bottom: 48px; }

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

    .features-grid { grid-template-columns: 1fr; }
    .editions-grid { grid-template-columns: 1fr; }
    .sports-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: 1fr; }
    .video-grid { grid-template-columns: 1fr; }
    .download-cards { grid-template-columns: 1fr; }
    .install-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; text-align: center; }

    .community-grid { grid-template-columns: 1fr; }
    .community-contacts { flex-direction: row; }
    .contact-card { flex: 1; }
}

@media (max-width: 480px) {
    .trust-items { grid-template-columns: 1fr; }
    .sports-grid { grid-template-columns: 1fr; }
    .community-contacts { flex-direction: column; }
    .hero-title { font-size: 32px; }
}