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}
.card-line{transition:all .3s ease;border-bottom:4px solid transparent}
.card-line:hover{transform:translateY(-6px);box-shadow:0 20px 40px -12px rgba(37,99,235,.18);border-bottom-color:#2563eb}
.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)}
.faq-arrow{transition:transform .3s ease}
.pulse-dot{position:relative}
.pulse-dot::after{content:"";position:absolute;top:0;right:0;width:8px;height:8px;border-radius:9999px;background:#10b981;animation:ping 1.6s ease-out infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(16,185,129,.5)}100%{box-shadow:0 0 0 8px rgba(16,185,129,0)}}