.layer {
  display: none;
  position: fixed;
  top: 20%;
  left: 50%;
  transform: translate(-50%, -20%);
  background: #fff;
  border: 1px solid #ccc;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0,0,0,0.3);
  z-index: 1000;
}
.server_partinfo_item {
  margin: 5px 0;
}
.list-container {
  margin-top: 20px;
}
.btn {
  padding: 6px 10px;
  margin: 5px;
  background: #007BFF;
  color: #fff;
  border: none;
  cursor: pointer;
}
.btn:hover {
  background: #0056b3;
}