堆叠卡片动画问题：首元素背景色不切换且卡片穿越

问题1：仅显示第一张卡片背景色修复 #

原因 #

• CSS通过[data-slide="n"]直接指定各位置卡片的背景色，但JS中错误尝试添加不存在的color-*类，导致样式逻辑混乱。
• 轮播时卡片的data-slide值更新后，CSS规则未正确匹配对应卡片的背景色。

修复 #

移除JS中冗余的color-*类操作，让CSS的[data-slide]规则直接控制对应位置的背景色，确保轮播时data-slide值正确映射到卡片样式。

问题2：前方卡片穿透后方卡片修复 #

原因 #

• data-slide="0"的卡片z-index为6（最高层级），即使添加fade-out类，仍处于所有卡片上方，消失时视觉上穿透下方卡片。

修复 #

在fade-out类中设置极低的z-index，让消失的卡片移到最底层；同时给队尾卡片添加淡入效果，让动画更自然。

完整修改后代码 #

JavaScript #

window.onload = () => {
    let sliderImagesBox = document.querySelectorAll('.cards-box');
    sliderImagesBox.forEach(el => {
        let imageNodes = el.querySelectorAll('.card:not(.hide)');
        let arrIndexes = [];
        (() => {
            let start = 0;
            while (imageNodes.length > start) {
                arrIndexes.push(start++);
            }
        })();

        let setIndex = (arr) => {
            for (let i = 0; i < imageNodes.length; i++) {
                imageNodes[i].dataset.slide = arr[i];
                if (arr[i] === 0) {
                    imageNodes[i].classList.add('fade-out');
                    imageNodes[i].classList.remove('fade-in');
                } else if (arr[i] === imageNodes.length - 1) {
                    imageNodes[i].classList.add('fade-in');
                    imageNodes[i].classList.remove('fade-out');
                } else {
                    imageNodes[i].classList.remove('fade-out', 'fade-in');
                }
            }
        }

        let rotateCards = () => {
            arrIndexes.unshift(arrIndexes.pop());
            setIndex(arrIndexes);
        }

        el.addEventListener('click', rotateCards);
        setIndex(arrIndexes);

        setInterval(rotateCards, 2000);
    });
};

CSS #

body {
  background: #D6D3CE;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  font-family: Helvetica;
}

.cards-box {
  position: relative;
  transform: translateX(-15px);
}

.cards-box .card {
  width: calc(18rem + 19vh);
  max-width: 80vw;
  background: #f7fffd;
  border-radius: 14px;
  cursor: pointer;
  opacity: 1;
  transition: opacity 0.8s cubic-bezier(0.18, 0.98, 0.45, 1);
}

.cards-box .card.fade-out {
  opacity: 0;
  pointer-events: none;
  z-index: 0; /* 让消失的卡片移到最底层 */
}

.cards-box .card.fade-in {
  opacity: 0.5;
  transition: opacity 0.8s cubic-bezier(0.18, 0.98, 0.45, 1);
}

.cards-box .card:not(.hide) {
  position: absolute;
  top: 0;
  left: 0;
  transition: all 0.8s cubic-bezier(0.18, 0.98, 0.45, 1);
  box-shadow: 0 2px 10px 0 rgba(0, 0, 0, 0.07);
}

.cards-box .card:not(.hide)[data-slide="0"] {
  transform: translate(0px, 0px) scale(1);
  z-index: 6;
  opacity: 1;
  background-color: #F6FF94;
}

.cards-box .card:not(.hide)[data-slide="1"] {
  transform: translate(30px, -35px) scale(0.975);
  z-index: 5;
  background-color: #fff;
}

.cards-box .card:not(.hide)[data-slide="2"] {
  transform: translate(60px, -65px) scale(0.95);
  z-index: 4;
  background-color: #B5B2A9;
}

.cards-box .card:not(.hide)[data-slide="3"] {
  transform: translate(90px, -95px) scale(0.925);
  z-index: 3;
  background-color: #000000;
}

.cards-box .card:not(.hide)[data-slide="4"] {
  transform: translate(120px, -120px) scale(0.9);
  z-index: 2;
  background-color: #F6FF94;
}

.cards-box .card:not(.hide)[data-slide="5"] {
  transform: translate(85px, -85px) scale(0.875);
  z-index: 1;
  opacity: 0.5;
}

.cards-box .card:not(.hide)[data-slide="0"] {
  transition: all 0.32s cubic-bezier(0.18, 0.98, 0.45, 1);
}

.content-placeholder {
  padding: 14px 18px 20px;
}

.content-placeholder .row {
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  margin-bottom: calc(.8rem + 0.4vw);
}

.content-placeholder .row .img {
  flex-shrink: 0;
  position: relative;
  margin-right: 20px;
  background: #000;
  width: calc(56px + 2vw);
  height: calc(56px + 2vw);
  border-radius: 50%;
}

.content-placeholder .row .img::after {
  content: attr(data-letter);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: calc(30px + 1vw);
  font-weight: bold;
  color: white;
}

.content-placeholder .row .img-text {
  background: #000;
  width: 45%;
  min-width: 145px;
  height: 20px;
  margin-top: -20px;
  border-radius: 10px;
}

.content-placeholder .row .img-text::after {
  content: "";
  display: block;
  width: 80%;
  height: 10px;
  margin-top: 30px;
  background: #000;
  border-radius: 10px;
}

.content-placeholder .text {
  background: #000;
  width: 90%;
  height: 2vh;
  min-height: 12px;
  max-height: 14px;
  border-radius: 10px;
}

.content-placeholder .text.text--m {
  width: 80%;
  margin-top: 2vh;
  height: 2vh;
  min-height: 12px;
}

.content-placeholder .text.text--s {
  width: 70%;
  margin-top: 2vh;
  height: 2vh;
  min-height: 12px;
}

HTML #

<div class="cards-box">
    <div class="card hide">
      <div class="content-placeholder">
        <div class="row">
          <div class="img"></div>
        </div>
        <div class="text text--l"></div>
        <div class="text text--m"></div>
        <div class="text text--s"></div>
      </div>
    </div>
    <div class="card">
      <div class="content-placeholder">
        <div class="row">
          <div class="img" data-letter="T"></div>
        </div>
        <div class="text text--l"></div>
        <div class="text text--m"></div>
        <div class="text text--s"></div>
      </div>
    </div>
    <div class="card">
      <div class="content-placeholder">
        <div class="row">
          <div class="img" data-letter="M"></div>
        </div>
        <div class="text text--l"></div>
        <div class="text text--m"></div>
        <div class="text text--s"></div>
      </div>
    </div>
    <div class="card">
      <div class="content-placeholder">
        <div class="row">
          <div class="img" data-letter="K"></div>
        </div>
        <div class="text text--l"></div>
        <div class="text text--m"></div>
        <div class="text text--s"></div>
      </div>
    </div>
    <div class="card">
      <div class="content-placeholder">
        <div class="row">
          <div class="img" data-letter="G"></div>
        </div>
        <div class="text text--l"></div>
        <div class="text text--m"></div>
        <div class="text text--s"></div>
      </div>
    </div>
    <div class="card">
      <div class="content-placeholder">
        <div class="row">
          <div class="img" data-letter="G"></div>
        </div>
        <div class="text text--l"></div>
        <div class="text text--m"></div>
        <div class="text text--s"></div>
      </div>
    </div>
  </div>

内容的提问来源于stack exchange，提问作者p_e_88