.section-header{text-align:center;margin-bottom:64px;opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}.section-header.visible{opacity:1;transform:translateY(0)}@media (max-width:640px){.section-header{margin-bottom:36px}}.section-title{font-size:clamp(22px,4vw,48px);font-weight:900;color:#582c83;margin-bottom:16px;line-height:1.1}.section-desc{font-size:16px;color:#6b7280;max-width:640px;margin:0 auto;line-height:1.6}.feature-card.visible{opacity:1;transform:translateY(0)}