<button class="radikalwp-btn-glass">شروع رایگان<//button>

.radikalwp-btn-glass {
  padding: 13px 34px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 14px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 26px rgba(15, 23, 42, .18);
  transition: background .25s ease, transform .2s ease;
}
.radikalwp-btn-glass:hover {
  background: rgba(255, 255, 255, .24);
  transform: translateY(-2px);
}