.op-arc-slider {
  width: 100%;
  max-width: 420px;
  margin: auto;
  position: relative;
  overflow: hidden;
}
.op-arc-slide {
  background: linear-gradient(#eef3ff,#cdd9ff);
  border-radius: 24px;
  padding: 20px;
  text-align: left;
  min-height: 340px;
}
.op-arc-img {
  width: 100%;
  height: 160px;
  background-size: cover;
  background-position: center;
  border-bottom-left-radius: 200px;
  border-bottom-right-radius: 200px;
  margin-top: 20px;
}
.op-prev, .op-next {
  position: absolute;
  bottom: 10px;
  background: #2d5eff;
  color: white;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  border: none;
}
.op-prev { left: 40%; }
.op-next { right: 40%; }