<button class="radikalwp-btn-gradient">شروع کنید<//button>

.radikalwp-btn-gradient {
  padding: 14px 32px;
  font-size: 16px;
  font-family: inherit;
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  background: linear-gradient(135deg, #7c3aed 0%, #ec4899 100%);
  background-size: 200% auto;
  transition: background-position .4s ease, transform .2s ease;
  box-shadow: 0 8px 24px rgba(124, 58, 237, .35);
}
.radikalwp-btn-gradient:hover {
  background-position: right center;
  transform: translateY(-2px);
}
.radikalwp-btn-gradient:active { transform: translateY(0); }