.bg-wechat-green {
  background-color: #2aae67;
}

.text-wechat-green {
  color: #2aae67;
}

.curved-bottom {
  position: relative;
  overflow: hidden;
  padding-bottom: 120px;
}

.curved-bottom::after {
  content: '';
  position: absolute;
  bottom: -180px;
  left: -20%;
  width: 140%;
  height: 360px;
  background-color: #ffffff;
  border-radius: 50% 50% 0 0;
  z-index: 1;
}

.platform-icon {
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.update-list-container {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  max-width: 480px;
}

/* Mobile nav animation */
#mobile-nav {
  animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}