#umch-main-section .dropdown-fade-enter-active,
#umch-main-section .dropdown-fade-leave-active {
  transition: opacity .15s ease;
}

#umch-main-section .dropdown-fade-enter-from,
#umch-main-section .dropdown-fade-leave-to {
  opacity: 0;
}

#umch-main-section .zh-dropdown-dropdown {
  max-height: var(--3fa54c0b);
}

#umch-main-section .zh-dropdown-dropdown::-webkit-scrollbar {
  background: transparent;
  display: block;
  height: 4px;
  width: 8px;
}

#umch-main-section .zh-dropdown-dropdown::-webkit-scrollbar-thumb {
  background: #f0f3f4;
  border-radius: 5px;
}