.qianhe-faq {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}
.qianhe-padding {
  padding: clamp(30px, 4.166667vw, 80px) 0;
}

/* 左侧分类栏 50%宽度 */
.cd-faq-categories {
  width: calc(50% - 15px);
  position: sticky;
  top: 100px;
  z-index: 2;
  float: none;
  height: 100%;
}
.cd-faq-categories.is-fixed {
  position: sticky;
  top: 100px; /* 对应padH=100，吸顶距离 */
}

.cd-faq-categories a {
  position: relative;
  display: block;
  padding: 25px 18px;
  font-size: clamp(16px, 1.15vw, 22px);
  font-family: var(--font-family);
  color: #fff;
  letter-spacing: 2px;
  text-shadow: -1px -1px 0 #9c9c9c, 1px -1px 0 #9c9c9c, -1px 1px 0 #9c9c9c,
    1px 1px 0 #9c9c9c;
  border-bottom: 1px solid #ddd;
  /* 取消单行省略，支持自动换行 */
  white-space: normal;
  text-overflow: unset;
  line-height: 1.6;
}

.cd-faq-categories .selected,
.cd-faq-categories a:hover {
  color: var(--color-primary);
  text-shadow: 0 0 0 var(--color-primary);
}

/* 右侧FAQ内容区 50%宽度 */
.cd-faq-items {
  width: calc(50% - 15px);
  float: none;
  padding-left: 0;
  position: relative;
  height: auto;
  overflow: visible;
  -webkit-transform: translateZ(0) translateX(0);
  -moz-transform: translateZ(0) translateX(0);
  -ms-transform: translateZ(0) translateX(0);
  -o-transform: translateZ(0) translateX(0);
  transform: translateZ(0) translateX(0);
}

.cd-faq {
  width: 100%;
  max-width: unset;
  margin: 2em auto;
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.1);
}
.cd-faq:after {
  content: "";
  display: table;
  clear: both;
}
.cd-faq-group .faq-list.card {
  width: 100%;
  margin-top: 12px;
  border: 1px solid #dfe3e6;
}

.cd-faq-group .faq-list .card-header {
  padding: 15px 20px;
  background-color: #fff;
  border: none;
}

.cd-faq-group .faq-list .collapse,
.cd-faq-group .faq-list .collapsing {
  border-top: 1px solid #dfe3e6;
}

.cd-faq-items h3 {
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
  margin: 0;
}

.cd-faq-items h3 span {
  display: block;
  flex: 1;
  padding-right: 20px;
  font-size: 17px;
  letter-spacing: 0;
}

.cd-faq-items h3 .toggle-btn::before {
  flex-shrink: 0;
  content: "\e687";
  font-family: "iconfont";
  font-size: 20px;
}

.cd-faq-items h3[aria-expanded="true"] .toggle-btn::before {
  content: "\e6b3";
}

.cd-faq-items .card-body {
  overflow: hidden;
  font-size: clamp(14px, 0.83vw, 16px);
}

/* 移动端：宽度小于991px 恢复上下堆叠 */
@media (max-width: 991px) {
  .cd-faq-categories a {
    padding: 15px 0;
  }
  .cd-faq-categories {
  position: relative;
  top: auto;
}
  .qianhe-faq {
    flex-direction: column;
    gap: 0;
  }
  .cd-faq-categories,
  .cd-faq-items {
    width: 100%;
  }
  .cd-faq-categories {
    position: relative;
  }
  .cd-faq-categories.is-fixed {
    position: relative;
    top: auto;
  }
}