.secret-message {
  filter: blur(6px);
  transition: filter 0.3s ease;
  cursor: pointer;
}

.secret-message:hover {
  filter: blur(0);
}
@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

.typewriter {
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid rgba(0,0,0,0.75); /* 光标效果 */
  animation: typing 4s steps(40, end);
}