body {
    background-color: #000;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.countdown {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }

    50% {
        opacity: 0.7;
    }

    100% {
        opacity: 1;
    }
}

.btn-hover {
    transition: all 0.3s ease;
}

.btn-hover:hover {
    transform: scale(1.05);
    background-color: #facc15;
}

/* 参与人数与加入名单动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.join-item {
    animation: fadeInUp 0.35s ease both;
}

/* 底部向上滚动轨道样式 */
#join-list {
    position: relative;
}

#join-track {
    display: flex;
    flex-direction: column;
    will-change: transform;
    transition: transform 0.35s ease;
}