.container{max-width:1200px;margin:0 auto;padding:0 1rem}.platform-hero{min-height:500px;display:flex;align-items:center;justify-content:center;text-align:center;padding:4rem 1rem}.platform-hero-content{max-width:800px;margin:0 auto}.platform-hero-title{font-size:3rem;font-weight:700;color:white;margin-bottom:1rem}.section{padding:4rem 1rem}.section-title{font-size:2.5rem;font-weight:700;text-align:center;margin-bottom:1rem}.section-subtitle{text-align:center;color:#6b7280;margin-bottom:3rem;font-size:1.125rem}.features-grid{display:grid;grid-template-columns:repeat(4,minmax(0,280px));gap:1.5rem;justify-content:center}.feature-card{background:white;padding:2rem;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.08);transition:all .3s}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-title{font-size:1.25rem;font-weight:700;margin-bottom:.5rem}.feature-description{color:#6b7280;line-height:1.6}.cta{background:linear-gradient(135deg,#667eea,#764ba2);padding:4rem 1rem;text-align:center;color:white}.cta-title{font-size:2.5rem;font-weight:700;margin-bottom:1rem}.cta-subtitle{font-size:1.125rem;margin-bottom:2rem;opacity:.9}.footer{padding:3rem 1rem}.footer-content{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-bottom:2rem}.footer-section h3{margin-bottom:1rem;font-size:1.125rem}.footer-links{list-style:none;padding:0}.footer-links li{margin-bottom:.5rem}.footer-links a{text-decoration:none;transition:opacity .3s}.footer-links a:hover{opacity:.7}.social-links{display:flex;gap:1rem;margin-top:1rem}.social-link{width:40px;height:40px;background:rgba(255,255,255,.1);border-radius:50%;display:flex;align-items:center;justify-content:center;color:white;text-decoration:none;transition:all .3s}.social-link:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}.footer-bottom{text-align:center;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1)}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:50px;height:50px;background:#667eea;color:white;border:none;border-radius:50%;cursor:pointer;box-shadow:0 4px 12px rgba(102,126,234,.4);z-index:1000}.mobile-menu-toggle{display:none}.desktop-nav{display:flex}@media (max-width:639px){.platform-hero{min-height:400px;padding:2rem 1rem}.platform-hero-title{font-size:1.75rem!important}.section{padding:2rem 1rem}.section-title{font-size:1.5rem!important}.section-subtitle{font-size:1rem}.features-grid{grid-template-columns:1fr!important;gap:1rem}.feature-card{padding:1.5rem}.cta-title{font-size:1.75rem}.cta-subtitle{font-size:1rem}.footer-content{grid-template-columns:1fr!important;gap:2rem}.back-to-top{width:45px;height:45px;bottom:1rem;right:1rem}.desktop-nav{display:none!important}.mobile-menu-toggle{display:block!important}}@media (min-width:640px) and (max-width:1024px){.platform-hero-title{font-size:2.5rem}.section-title{font-size:2rem}.features-grid{grid-template-columns:repeat(3,minmax(0,280px))!important;gap:1.5rem;justify-content:center}.footer-content{grid-template-columns:repeat(2,1fr)}}@media (min-width:1025px){.container{padding:0 2rem}}