/* ===== page-faq 页面专属样式 ===== */
.page-faq {
  --faq-gap: 24px;
  --faq-radius: 6px;
  --faq-bg-card: #FFFFFF;
  --faq-bg-answer: #F8F6F3;
  --faq-red-line: rgba(229, 57, 53, 0.2);
  --faq-red-solid: #E53935;
  --faq-yellow-accent: #FFCA28;
  --faq-text-dark: #212121;
  --faq-text-muted: #5D5D5D;
  --faq-border-light: rgba(33, 33, 33, 0.08);
  --faq-shadow-sm: 0 1px 3px rgba(33, 33, 33, 0.06);
  --faq-shadow-hover: 0 4px 16px rgba(229, 57, 53, 0.12);
  --faq-transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  background-color: var(--color-bg-warm, #F5F0EB);
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  color: var(--faq-text-dark);
  line-height: 1.6;
  scroll-behavior: smooth;
}

/* 隐藏辅助类 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* 容器 */
.page-faq__container {
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: 0 var(--gap, 16px);
  padding-top: calc(var(--header-height, 64px) + 16px);
  padding-bottom: 64px;
}

/* 面包屑 */
.page-faq__breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--faq-text-muted);
  margin-bottom: 24px;
  padding-top: 8px;
}
.page-faq__breadcrumb-link {
  color: var(--faq-red-solid);
  text-decoration: none;
  font-weight: 500;
  transition: opacity var(--faq-transition);
}
.page-faq__breadcrumb-link:hover {
  opacity: 0.75;
}
.page-faq__breadcrumb-sep {
  color: rgba(33, 33, 33, 0.25);
  font-size: 14px;
}
.page-faq__breadcrumb-current {
  font-weight: 500;
  color: var(--faq-text-dark);
}

/* 页面标题区 */
.page-faq__header {
  margin-bottom: 40px;
  border-left: 4px solid var(--faq-red-solid);
  padding-left: 20px;
}
.page-faq__title {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  color: var(--faq-text-dark);
  margin: 0 0 8px 0;
  line-height: 1.2;
}
.page-faq__subtitle {
  font-size: 16px;
  color: var(--faq-text-muted);
  margin: 0 0 20px 0;
  max-width: 620px;
}

/* 搜索框 */
.page-faq__search {
  position: relative;
  max-width: 480px;
}
.page-faq__search-input {
  display: block;
  width: 100%;
  padding: 12px 16px 12px 44px;
  font-size: 15px;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  border: 2px solid var(--faq-border-light);
  border-radius: var(--faq-radius);
  background-color: #FFFFFF;
  color: var(--faq-text-dark);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.page-faq__search-input::placeholder {
  color: #9E9E9E;
}
.page-faq__search-input:focus {
  border-color: var(--faq-red-solid);
  box-shadow: 0 0 0 3px rgba(229, 57, 53, 0.15);
}
.page-faq__search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #9E9E9E;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 布局：索引侧栏 + 内容区 */
.page-faq__layout {
  display: flex;
  gap: 40px;
  align-items: flex-start;
}

/* 索引侧栏 */
.page-faq__index {
  flex: 0 0 220px;
  position: sticky;
  top: calc(var(--header-height, 64px) + 16px);
  background-color: #FFFFFF;
  border-radius: var(--faq-radius);
  padding: 20px 16px;
  box-shadow: var(--faq-shadow-sm);
  border: 1px solid var(--faq-border-light);
}
.page-faq__index-title {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--faq-text-dark);
  margin: 0 0 12px 0;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--faq-red-solid);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.page-faq__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq__index-list li {
  margin-bottom: 4px;
}
.page-faq__index-link {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--faq-text-dark);
  text-decoration: none;
  border-radius: 4px;
  transition: background-color var(--faq-transition), color var(--faq-transition);
  position: relative;
}
.page-faq__index-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background-color: var(--faq-red-solid);
  border-radius: 0 2px 2px 0;
  transition: height var(--faq-transition);
}
.page-faq__index-link:hover,
.page-faq__index-link:focus-visible {
  background-color: rgba(229, 57, 53, 0.06);
  color: var(--faq-red-solid);
  outline: none;
}
.page-faq__index-link:hover::before,
.page-faq__index-link:focus-visible::before {
  height: 20px;
}
.page-faq__index-link[data-active="true"] {
  background-color: rgba(229, 57, 53, 0.08);
  color: var(--faq-red-solid);
  font-weight: 600;
}
.page-faq__index-link[data-active="true"]::before {
  height: 20px;
}

.page-faq__index-cta {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-border-light);
}
.page-faq__index-cta-text {
  font-size: 13px;
  color: var(--faq-text-muted);
  margin: 0 0 10px 0;
}
.page-faq__index-btn {
  display: block;
  text-align: center;
  font-size: 13px;
  padding: 8px 12px;
  width: 100%;
}

/* 内容区 */
.page-faq__content {
  flex: 1;
  min-width: 0;
}

/* 每个问题区块 */
.page-faq__section {
  background-color: var(--faq-bg-card);
  border-radius: var(--faq-radius);
  padding: 28px 24px;
  margin-bottom: 24px;
  box-shadow: var(--faq-shadow-sm);
  border: 1px solid var(--faq-border-light);
  transition: box-shadow var(--faq-transition);
  scroll-margin-top: calc(var(--header-height, 64px) + 80px);
}
.page-faq__section:target {
  box-shadow: var(--faq-shadow-hover);
  border-color: var(--faq-red-line);
}

.page-faq__section-heading {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  color: var(--faq-text-dark);
  margin: 0 0 12px 0;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--faq-red-line);
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-faq__section-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--faq-red-line);
}

/* 版本区配图 */
.page-faq__section-visual {
  margin: 16px 0 20px 0;
  border-radius: var(--faq-radius);
  overflow: hidden;
  background-color: var(--color-bg-warm, #F5F0EB);
  display: flex;
  justify-content: center;
}
.page-faq__section-img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
  aspect-ratio: 600 / 300;
  width: 100%;
}

/* FAQ 列表定义 */
.page-faq__faq-list {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* 单个 Q&A 条目 */
.page-faq__faq-item {
  border: 1px solid var(--faq-border-light);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color var(--faq-transition);
}
.page-faq__faq-item:hover {
  border-color: rgba(229, 57, 53, 0.18);
}
.page-faq__faq-item[data-open="true"] {
  border-color: var(--faq-red-line);
  box-shadow: 0 2px 8px rgba(229, 57, 53, 0.06);
}

/* 问题标题（可点击） */
.page-faq__faq-question {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--faq-text-dark);
  cursor: pointer;
  user-select: none;
  background-color: #FFFFFF;
  transition: background-color var(--faq-transition), color var(--faq-transition);
  margin: 0;
  -webkit-tap-highlight-color: transparent;
}
.page-faq__faq-question:hover {
  background-color: rgba(229, 57, 53, 0.03);
}
.page-faq__faq-question:focus-visible {
  outline: 2px solid var(--faq-red-solid);
  outline-offset: -2px;
}
.page-faq__faq-q-marker {
  flex: 0 0 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--faq-red-solid);
  color: #FFFFFF;
  font-size: 13px;
  font-weight: 700;
  border-radius: 50%;
  line-height: 1;
}
.page-faq__faq-q-text {
  flex: 1;
  min-width: 0;
}
.page-faq__faq-icon {
  flex: 0 0 18px;
  color: var(--faq-red-solid);
  transition: transform var(--faq-transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-faq__faq-item[data-open="true"] .page-faq__faq-icon {
  transform: rotate(45deg);
}

/* 答案区域 */
.page-faq__faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease, opacity 0.3s ease;
  opacity: 0;
  padding: 0 16px 0 16px;
  background-color: var(--faq-bg-answer);
  border-top: 0 solid transparent;
}
.page-faq__faq-item[data-open="true"] .page-faq__faq-answer {
  max-height: 400px;
  opacity: 1;
  padding: 14px 16px 18px 16px;
  border-top-width: 1px;
  border-top-style: solid;
  border-top-color: var(--faq-red-line);
}
.page-faq__faq-answer p {
  margin: 0 0 10px 0;
  font-size: 15px;
  color: var(--faq-text-dark);
  line-height: 1.7;
}
.page-faq__faq-answer p:last-child {
  margin-bottom: 0;
}

/* 内联链接 */
.page-faq__inline-link {
  color: var(--faq-red-solid);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  font-weight: 500;
  transition: color var(--faq-transition);
}
.page-faq__inline-link:hover {
  color: #C62828;
}

/* 更多帮助区块 */
.page-faq__more-help {
  margin-top: 36px;
  padding: 28px 24px;
  background: linear-gradient(135deg, rgba(229, 57, 53, 0.04), rgba(255, 202, 40, 0.06));
  border-radius: var(--faq-radius);
  border: 1px dashed var(--faq-red-line);
  text-align: center;
}
.page-faq__more-help-title {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--faq-text-dark);
  margin: 0 0 8px 0;
}
.page-faq__more-help-text {
  font-size: 15px;
  color: var(--faq-text-muted);
  margin: 0 0 18px 0;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.page-faq__more-help-btn {
  display: inline-block;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 600;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .page-faq__container {
    padding-top: calc(var(--header-height, 64px) + 8px);
    padding-bottom: 40px;
  }

  .page-faq__layout {
    flex-direction: column;
    gap: 20px;
  }

  .page-faq__index {
    flex: none;
    width: 100%;
    position: static;
    padding: 16px 14px;
  }
  .page-faq__index-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }
  .page-faq__index-list li {
    margin-bottom: 0;
  }
  .page-faq__index-link {
    padding: 6px 12px;
    font-size: 13px;
    border: 1px solid var(--faq-border-light);
    border-radius: 20px;
  }
  .page-faq__index-link::before {
    display: none;
  }
  .page-faq__index-link[data-active="true"] {
    background-color: var(--faq-red-solid);
    color: #FFFFFF;
    border-color: var(--faq-red-solid);
  }
  .page-faq__index-cta {
    display: none;
  }

  .page-faq__section {
    padding: 20px 16px;
    margin-bottom: 16px;
  }
  .page-faq__faq-question {
    padding: 12px 12px;
    font-size: 14px;
  }
  .page-faq__faq-q-marker {
    flex: 0 0 24px;
    height: 24px;
    font-size: 12px;
  }
  .page-faq__faq-icon {
    flex: 0 0 16px;
  }
  .page-faq__faq-item[data-open="true"] .page-faq__faq-answer {
    padding: 12px 12px 16px 12px;
  }
  .page-faq__faq-answer p {
    font-size: 14px;
  }
  .page-faq__more-help {
    padding: 20px 16px;
  }
  .page-faq__more-help-title {
    font-size: 19px;
  }
  .page-faq__header {
    margin-bottom: 24px;
    padding-left: 14px;
  }
  .page-faq__title {
    font-size: 26px;
  }
  .page-faq__subtitle {
    font-size: 14px;
  }
  .page-faq__search-input {
    font-size: 14px;
    padding: 10px 14px 10px 40px;
  }
}

@media (max-width: 480px) {
  .page-faq__container {
    padding-left: 12px;
    padding-right: 12px;
  }
  .page-faq__section-heading {
    font-size: 18px;
  }
  .page-faq__index-list {
    gap: 3px;
  }
  .page-faq__index-link {
    padding: 5px 10px;
    font-size: 12px;
  }
}

/* 桌面大屏优化 */
@media (min-width: 1440px) {
  .page-faq__index {
    flex: 0 0 240px;
    padding: 24px 20px;
  }
  .page-faq__section {
    padding: 32px 28px;
  }
}