<button class="radikalwp-btn-slide-i"><span class="radikalwp-btn-slide-ic">↓<//span>دانلود فایل<//button>

.radikalwp-btn-slide-i {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 9px 26px 9px 9px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #1e1b4b;
  background: #eef2ff;
  border: 1.5px solid #c7d2fe;
  border-radius: 999px;
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease;
}
.radikalwp-btn-slide-ic {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-size: 15px;
  color: #fff;
  background: #6366f1;
  border-radius: 50%;
  transition: transform .3s ease;
}
.radikalwp-btn-slide-i:hover {
  background: #e0e7ff;
  border-color: #a5b4fc;
}
.radikalwp-btn-slide-i:hover .radikalwp-btn-slide-ic { transform: translateY(3px); }