body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f0f8ff;
  margin: 0;
}
.gift-box {
  position: relative;
  width: 150px;
  height: 150px;
  background-color: #ff5252;
  border-radius: 10px;
  cursor: pointer;
  overflow: hidden;
}
.gift-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  height: 20px;
  background-color: #ffffff;
  z-index: 2;
}
.gift-box .lid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background-color: #ff8a80;
  border-bottom: 5px solid #ffffff;
  transform-origin: top center;
  transition: transform 0.5s ease;
  z-index: 1;
}
.gift-box .content {
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 50%;
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease;
  opacity: 0;
}
.gift-box .content img {
  max-width: 100%;
  max-height: 100%;
}
.gift-box.open .lid {
  transform: rotateX(180deg);
}
.gift-box.open .content {
  opacity: 1;
}