js点击翻转动画换奖品

<div class="flip-card" onclick="flipCard(this)">
  <div class="flip-card-inner">
    <div class="flip-card-front">
      <!-- 正面内容 -->
      Click Me!
    </div>
    <div class="flip-card-back">
      <!-- 背面内容，即奖品 -->
      Prize: iPhone 12
    </div>
  </div>
</div>

.flip-card {
  background-color: transparent;
  width: 200px;
  height: 200px;
  perspective: 1000px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}

.flip-card-front {
  background-color: #333;
  color: white;
  text-align: center;
  line-height: 200px;
}

.flip-card-back {
  background-color: #2980b9;
  color: white;
  transform: rotateY(180deg);
  line-height: 200px;
}

function flipCard(card) {
  card.classList.toggle('flipped');
}