按钮模版：btn-dark-2

<div class="container">
  <button class="btn-dark-2"><span>View Room</span></button>
</div>

.container {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #000;
  width: 100%;
  height: 200px;
}

.btn-dark-2 {
  border: none;
  cursor: pointer;
  position: relative;
  padding: 16px 28px;
  border-radius: 8px;
  background: linear-gradient(45deg, #feac5e, #c779d0, #4bc0c8);
}
.btn-dark-2 span {
  position: relative;
  color: #fff;
  z-index: 9;
}
.btn-dark-2::before {
  content: "";
  position: absolute;
  inset: 1px;
  background: #272727;
  border-radius: 7px;
  transition: 0.3s;
}
.btn-dark-2:hover::before {
  opacity: 0.6;
}
.btn-dark-2::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, #feac5e, #c779d0, #4bc0c8);
  border-radius: 7px;
  filter: blur(12px);
  opacity: 0;
  transition: 0.3s;
}
.btn-dark-2:hover::after {
  opacity: 1;
}