.fk-sidebar {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(20%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: "Microsoft YaHei", Arial, sans-serif;
}

.fk-sidebar-item {
  width: 54px;
  height: 54px;
  background: #fff;
  color: #255a85;
  border: 1px solid #e5eaf0;
  border-radius: 8px;
  box-shadow: 0 3px 12px rgba(0,0,0,.09);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
  cursor: pointer;
  position: relative;
  font-size: 11px;
  transition: .2s ease;
}

.fk-sidebar-item svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.fk-sidebar-item:hover {
  background: #1769a6;
  color: #fff;
  border-color: #1769a6;
}

.fk-sidebar-tooltip {
  position: absolute;
  right: 64px;
  top: 50%;
  transform: translateY(-50%);
  background: #173b59;
  color: white;
  padding: 11px 16px;
  border-radius: 6px;
  font-size: 13px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: .2s ease;
}

.fk-sidebar-item:hover .fk-sidebar-tooltip,
.fk-sidebar-item:focus-visible .fk-sidebar-tooltip {
  opacity: 1;
  visibility: visible;
}

@media(max-width: 768px) {
  .fk-sidebar {
    right: 8px;
    gap: 5px;
  }
  .fk-sidebar-item {
    width: 44px;
    height: 44px;
    font-size: 10px;
  }
  .fk-sidebar-item svg {
    width: 18px;
    height: 18px;
  }
  .fk-sidebar-tooltip {
    display: none;
  }
}