html{scroll-behavior:smooth}
body{font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
.nav-scrolled{background:#ffffff;box-shadow:0 1px 0 0 #e5e7eb}
.ft-card{transition:all .3s ease}
.ft-card:hover{transform:translateY(-6px);box-shadow:0 24px 48px -12px rgba(79,70,229,.18)}
.ft-card:hover .ft-icon{background:#4f46e5;color:#fff;transform:scale(1.1)}
.ft-icon{transition:all .35s ease}
@keyframes sig{0%,100%{transform:scaleY(1)}50%{transform:scaleY(.45)}}
.sig-bar{display:inline-block;width:5px;border-radius:3px;background:#4f46e5;transform-origin:bottom}
.sig-b1{height:14px;animation:sig 1s ease-in-out infinite}
.sig-b2{height:22px;animation:sig 1.2s ease-in-out infinite .15s}
.sig-b3{height:30px;animation:sig 1.4s ease-in-out infinite .3s}
.t-card{transition:all .3s ease}
.t-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px -14px rgba(79,70,229,.15)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-item.open .faq-a{max-height:400px}
.faq-item.open .faq-arrow{transform:rotate(180deg);color:#4f46e5}
.faq-arrow{transition:all .3s ease}