<button class="radikalwp-btn-chrome">خرید اشتراک<//button>

.radikalwp-btn-chrome {
  position: relative;
  padding: 13px 36px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #1e293b;
  background: linear-gradient(135deg, #e2e8f0, #f8fafc 40%, #cbd5e1 60%, #e2e8f0);
  border: 1px solid #94a3b8;
  border-radius: 12px;
  cursor: pointer;
  overflow: hidden;
}
.radikalwp-btn-chrome::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 40%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .85), transparent);
  right: -50%;
  transform: skewX(-18deg);
  animation: radikalwp-chrome-shine 2.6s ease-in-out infinite;
}
@keyframes radikalwp-chrome-shine {
  0%, 55% { right: -50%; }
  100% { right: 130%; }
}