.bn {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: flex;
  background: rgba(20,26,22,0.92);
  backdrop-filter: blur(12px);
  border-top: 1rpx solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
  z-index: 60;
}
.bn__item {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16rpx 0 14rpx;
  color: var(--text-3);
}
.bn__item--active::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 48rpx; height: 4rpx;
  border-radius: 999rpx;
  background: linear-gradient(90deg, var(--gold), var(--gold-2));
}
.bn__item--active { color: var(--gold); }
.bn__emoji { line-height: 1; }
.bn__label { font-size: 22rpx; margin-top: 6rpx; }
.bn__item--active .bn__label { color: var(--gold-2); }