main { padding-top: 90px; }
.platform-hero { text-align: center; padding: 4rem 1rem 3rem 1rem; max-width: 900px; margin: 0 auto; }
.platform-badge { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.375rem 1rem; background: rgba(99, 102, 241, 0.1); border: 1px solid rgba(99, 102, 241, 0.2); border-radius: 50px; font-size: 0.85rem; font-weight: 600; color: #818cf8; margin-bottom: 1.5rem; }
.platform-title { font-size: clamp(2.5rem, 4vw, 3.5rem); font-weight: 800; letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 1.5rem; color: var(--text-main); }
.platform-desc { color: var(--text-muted); font-size: 1.15rem; line-height: 1.6; margin-bottom: 2.5rem; }
.platform-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.platform-preview { max-width: 1100px; margin: 2rem auto 6rem auto; padding: 0 1.5rem; }
.mockup-window { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6); }
.mockup-header { background: rgba(30, 41, 59, 0.5); padding: 1rem 1.5rem; display: flex; align-items: center; gap: 0.5rem; border-bottom: 1px solid var(--border); }
.mockup-dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255, 255, 255, 0.2); }
.mockup-url-text { font-size: 0.85rem; color: var(--text-muted); margin-left: 0.5rem; }

.mockup-body { padding: 0; display: flex; min-height: 380px; background: #0b111e; }
.mockup-sidebar { width: 220px; border-right: 1px solid var(--border); padding: 1rem; display: flex; flex-direction: column; gap: 0.25rem; }

.mockup-nav-item { padding: 0.75rem 1rem; border-radius: 8px; color: var(--text-muted); font-size: 0.9rem; font-weight: 500; display: flex; align-items: center; gap: 0.75rem; cursor: pointer; transition: all 0.2s ease; }
.mockup-nav-item:hover { background: rgba(94, 92, 230, 0.08); color: var(--accent, #5e5ce6); }
.mockup-nav-item.active { background: rgba(99, 102, 241, 0.15); color: #818cf8; }

.mockup-content { flex: 1; padding: 1.5rem; background: var(--bg-1, #f5f5f7); display: flex; flex-direction: column; gap: 1.5rem; }

.mockup-tab-content { display: none; }
.mockup-tab-content.active { display: block; }

.tab-header { margin-bottom: 1rem; }
.tab-title { font-size: 1.25rem; font-weight: 700; color: var(--surface); margin-bottom: 0.25rem; }
.tab-desc { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

.preview-img-placeholder { width: 100%; border-radius: 8px; border: 1px solid var(--stroke, rgba(0,0,0,0.08)); box-shadow: 0 4px 16px rgba(0,0,0,0.06); display: block; }

.features-section { max-width: 1200px; margin: 0 auto 6rem auto; padding: 0 1.5rem; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 2rem; }
.feature-card { background: var(--bg-secondary); border: 1px solid var(--border); border-radius: 16px; padding: 2.5rem 2rem; transition: transform 0.3s ease, border-color 0.3s ease; }
.feature-card:hover { transform: translateY(-4px); border-color: rgba(99, 102, 241, 0.4); }
.feature-icon { width: 48px; height: 48px; background: rgba(99, 102, 241, 0.1); border: 1px solid rgba(99, 102, 241, 0.2); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: #818cf8; margin-bottom: 1.5rem; }
.feature-card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.75rem; color: var(--text-main); }
.feature-card p { color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }

.platform-cta-banner { max-width: 1100px; margin: 0 auto 6rem auto; padding: 4rem 2rem; background: linear-gradient(135deg, rgba(30, 41, 59, 0.75), rgba(17, 24, 39, 0.95)); border: 1px solid rgba(99, 102, 241, 0.3); border-radius: 24px; text-align: center; position: relative; overflow: hidden; }
.cta-heading { font-size: clamp(2rem, 3vw, 2.75rem); font-weight: 800; margin-bottom: 1rem; color: var(--text-main); }
.cta-desc { color: var(--text-muted); font-size: 1.1rem; max-width: 650px; margin: 0 auto 2rem auto; line-height: 1.6; }
.cta-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Вспомогательные классы для иконок Lucide */
.icon-sm { width: 16px; height: 16px; }
.icon-md { width: 18px; height: 18px; }
.icon-lg { width: 24px; height: 24px; }

@media (max-width: 768px) { 
    .mockup-body { grid-template-columns: 1fr; } 
    .mockup-sidebar { display: none; } 
}