body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    scroll-behavior: smooth;
}
/* Reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}
.reveal.active {
    opacity: 1;
    transform: translateY(0);
}
.nav-link {
    position: relative;
    transition: all 0.3s ease;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #ef4444; /* red-500 */
    transition: width 0.3s ease;
}
.nav-link:hover::after {
    width: 100%;
}
.dropdown-menu {
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
}
.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #555;
}