:root {
  --tg-blue: #0088cc;
  --tg-blue-hover: #0099e6;
}

.float-wrapper {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column-reverse; 
  align-items: flex-end;          
  gap: 0.8rem;
  z-index: 200;
}

.float-btn {
  width: 64px;
  height: 64px;
  background: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 28px rgba(0, 136, 204, 0.35);
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.float-btn i {
  font-size: 34px;
  color: var(--tg-blue);
  transition: transform 0.25s ease, color 0.25s ease;
}

.float-btn:hover {
  transform: scale(1.06);
  box-shadow: 0 10px 36px rgba(0, 136, 204, 0.45);
}

.float-btn:hover i {
  color: var(--tg-blue-hover);
  transform: scale(1.1);
}


.float-tip {
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(12px) saturate(180%);
  color: #0f172a;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.15);
  margin-right: 0.8rem;
  max-width: 260px;
  text-align: center;
  white-space: normal; 
  word-break: break-word; 
  opacity: 0;
  transform: translateY(8px);
  animation: fadeInUp 0.8s ease forwards;
}


@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(12px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .float-wrapper {
    bottom: 1.5rem;
    right: 1.5rem;
    gap: 0.7rem;
  }

  .float-tip {
    font-size: 0.9rem;
    padding: 0.6rem 0.9rem;
    max-width: 200px;
    text-align: left; 
  }

  .float-btn {
    width: 58px;
    height: 58px;
  }
  .float-btn i {
    font-size: 30px;
  }
}

@media (max-width: 480px) {
  .float-wrapper {
    bottom: 1.2rem;
    right: 1.2rem;
    gap: 0.6rem;
  }

  .float-tip {
    font-size: 0.85rem;
    padding: 0.55rem 0.8rem;
    max-width: 170px;
  }

  .float-btn {
    width: 54px;
    height: 54px;
  }
  .float-btn i {
    font-size: 28px;
  }
}