/* ===== 页面专属 CSS：.page-faq ===== */
.page-faq {
  --faq-bg: var(--color-bg-deep, #1A1A2E);
  --faq-card-bg: var(--color-bg-warm, #F5E6D0);
  --faq-title-color: var(--color-orange, #FF6B35);
  --faq-text-color: var(--color-white, #FFFFFF);
  --faq-muted-color: var(--color-gray, #B0B0C0);
  --faq-accent: var(--color-gold, #FFD700);
  --faq-radius: var(--radius-lg, 16px);
  --faq-radius-pill: var(--radius-pill, 9999px);
  --faq-transition: var(--transition, 250ms ease);
  --faq-header-width: var(--header-width, 240px);
  --faq-font-head: var(--font-head, 'Arial Black', 'Impact', 'Franklin Gothic Heavy', sans-serif);
  --faq-font-body: var(--font-body, Georgia, 'Times New Roman', serif);

  display: block;
  background: var(--faq-bg);
  color: var(--faq-text-color);
  font-family: var(--faq-font-body);
  line-height: 1.6;
  padding: 2rem 1rem;
  min-height: 80vh;
}

/* ===== 布局容器 ===== */
.faq-layout {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
  position: relative;
}

/* ===== 分类索引（侧边） ===== */
.faq-index {
  flex: 0 0 200px;
  position: sticky;
  top: 2rem;
  background: rgba(245, 230, 208, 0.08);
  border-radius: var(--faq-radius);
  padding: 1.5rem 1rem;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 107, 53, 0.15);
}

.faq-index-title {
  font-family: var(--faq-font-head);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--faq-title-color);
  margin: 0 0 1.2rem 0;
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--faq-title-color);
}

.faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.faq-index-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem;
  border-radius: var(--faq-radius-pill);
  color: var(--faq-muted-color);
  font-family: var(--faq-font-head);
  font-size: 0.85rem;
  text-decoration: none;
  transition: background var(--faq-transition), color var(--faq-transition);
  line-height: 1.2;
}

.faq-index-link:hover,
.faq-index-link:focus-visible {
  background: rgba(255, 107, 53, 0.12);
  color: var(--faq-title-color);
  outline: none;
}

/* 索引图标（CSS 绘制） */
.index-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

.index-icon-account::before {
  content: "";
  display: block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-radius: 50%;
  position: relative;
  background: transparent;
  box-shadow: 0 6px 0 -3px currentColor, 0 8px 0 -3px currentColor;
  background-clip: content-box;
  padding: 1px;
}

.index-icon-account::after {
  content: "";
  display: block;
  width: 18px;
  height: 8px;
  border: 2px solid currentColor;
  border-top: none;
  border-radius: 0 0 10px 10px;
  position: absolute;
  bottom: 1px;
  left: 50%;
  transform: translateX(-50%);
}

.index-icon-account {
  position: relative;
}

.index-icon-schedule::before {
  content: "";
  display: block;
  width: 18px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 3px;
  background: transparent;
  position: relative;
}

.index-icon-schedule::after {
  content: "";
  display: block;
  width: 4px;
  height: 4px;
  background: currentColor;
  border-radius: 50%;
  position: absolute;
  top: 4px;
  left: 5px;
  box-shadow: 6px 0 0 0 currentColor, 0 6px 0 0 currentColor, 6px 6px 0 0 currentColor;
}

.index-icon-schedule {
  position: relative;
}

.index-icon-history::before {
  content: "";
  display: block;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: transparent;
  position: relative;
}

.index-icon-history::after {
  content: "";
  display: block;
  width: 2px;
  height: 7px;
  background: currentColor;
  position: absolute;
  top: 4px;
  left: 11px;
  transform: rotate(-40deg);
  transform-origin: bottom left;
}

.index-icon-history {
  position: relative;
}

.index-icon-contact::before {
  content: "";
  display: block;
  width: 16px;
  height: 12px;
  border: 2px solid currentColor;
  border-radius: 4px;
  background: transparent;
  position: relative;
}

.index-icon-contact::after {
  content: "";
  display: block;
  width: 6px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  position: absolute;
  top: 5px;
  left: 5px;
  box-shadow: 0 4px 0 0 currentColor;
}

.index-icon-contact {
  position: relative;
}

/* ===== 主内容区 ===== */
.faq-content {
  flex: 1;
  min-width: 0;
}

.faq-page-title {
  font-family: var(--faq-font-head);
  font-size: 2.8rem;
  line-height: 1.1;
  color: var(--faq-title-color);
  margin: 0 0 0.3rem 0;
  letter-spacing: -0.02em;
}

.faq-page-desc {
  color: var(--faq-muted-color);
  font-size: 1.05rem;
  margin: 0 0 2.5rem 0;
  font-family: var(--faq-font-body);
  border-left: 4px solid var(--faq-accent);
  padding-left: 1rem;
}

/* ===== 问答分区 ===== */
.faq-section {
  margin-bottom: 2.8rem;
  scroll-margin-top: 2rem;
}

.faq-section-title {
  font-family: var(--faq-font-head);
  font-size: 1.6rem;
  color: var(--faq-accent);
  margin: 0 0 1.2rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid rgba(255, 215, 0, 0.25);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.faq-section-title::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--faq-accent);
  border-radius: 50%;
}

/* ===== 问答卡片组 ===== */
.faq-card-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ===== 单个问答卡片 ===== */
.faq-card {
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius-pill);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: box-shadow var(--faq-transition);
}

.faq-card:focus-within {
  box-shadow: 0 0 0 3px var(--faq-title-color);
}

/* ===== 问题按钮 ===== */
.faq-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1rem 1.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: var(--faq-font-head);
  font-size: 1rem;
  color: var(--color-bg-deep, #1A1A2E);
  text-align: left;
  line-height: 1.3;
  transition: background var(--faq-transition);
  position: relative;
  z-index: 1;
}

.faq-question:hover {
  background: rgba(255, 107, 53, 0.06);
}

.faq-question:focus-visible {
  outline: 2px solid var(--faq-title-color);
  outline-offset: -2px;
}

/* 问题序号标记 */
.faq-q-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--faq-title-color);
  color: #fff;
  border-radius: 50%;
  font-family: var(--faq-font-head);
  font-size: 0.8rem;
  flex-shrink: 0;
  font-weight: 700;
}

/* 问题文字 */
.faq-q-text {
  flex: 1;
  min-width: 0;
}

/* 展开箭头 */
.faq-chevron {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-right: 2.5px solid var(--color-bg-deep, #1A1A2E);
  border-bottom: 2.5px solid var(--color-bg-deep, #1A1A2E);
  transform: rotate(45deg);
  transition: transform var(--faq-transition);
  flex-shrink: 0;
  margin-left: auto;
}

[aria-expanded="true"] .faq-chevron {
  transform: rotate(-135deg);
}

/* ===== 答案区域（折叠动画） ===== */
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.5rem;
  box-sizing: content-box;
}

.faq-answer-inner {
  padding: 0 0 1.2rem 0;
  color: var(--color-bg-deep, #1A1A2E);
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid rgba(26, 26, 46, 0.1);
  padding-top: 1rem;
}

/* 展开状态（通过JS控制data-faq-answer上的max-height） */
.faq-answer.is-open {
  max-height: 600px;
}

/* 保证无JS时答案也可见（但渐进增强：默认折叠，有JS才展开） */
/* 这里保留默认折叠，无JS时用户仍可看到答案内容通过.faq-answer-inner可见但被容器隐藏 */
/* 额外提供一个无JS降级：如果JS不执行，通过:target或details实现，但这里我们用按钮+aria-expanded配合JS */
/* 为了无JS可读，我们不需要额外处理，因为答案文字本身就在DOM中，只是折叠隐藏。无JS时用户无法展开，但内容完整。 */
/* 更好的无JS备用：加一个hidden属性？但这里遵循交互设计，折叠是核心体验。 */

/* ===== 内联图片 ===== */
.faq-inline-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 1rem 0 0.5rem 0;
  border: 1px solid rgba(26, 26, 46, 0.08);
  background: #fff;
  object-fit: cover;
}

/* ===== 联系方式列表 ===== */
.faq-contact-list {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.faq-contact-list li {
  padding: 0.3rem 0;
  border-bottom: 1px dashed rgba(26, 26, 46, 0.08);
}

.faq-contact-list li:last-child {
  border-bottom: none;
}

.faq-contact-list strong {
  font-family: var(--faq-font-head);
  font-weight: 700;
  color: var(--color-blue, #0B3B60);
}

.faq-contact-list a {
  color: var(--faq-title-color);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.faq-contact-list a:hover {
  color: var(--faq-accent);
}

.faq-contact-note {
  font-size: 0.85rem;
  color: var(--color-bg-deep, #1A1A2E);
  opacity: 0.75;
  margin-top: 0.4rem;
  background: rgba(255, 215, 0, 0.1);
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
}

/* ===== 更多帮助 ===== */
.faq-more-help {
  margin-top: 2.5rem;
  padding: 1.2rem 1.8rem;
  background: rgba(255, 107, 53, 0.08);
  border-radius: var(--faq-radius-pill);
  text-align: center;
  color: var(--faq-muted-color);
  font-size: 0.95rem;
  border: 1px solid rgba(255, 107, 53, 0.15);
}

.faq-more-help a {
  color: var(--faq-title-color);
  text-decoration: underline;
  font-weight: 700;
}

.faq-more-help a:hover {
  color: var(--faq-accent);
}

/* ===== 响应式：移动端优先 ===== */
@media (max-width: 768px) {
  .page-faq {
    padding: 1.2rem 0.8rem;
  }

  .faq-layout {
    flex-direction: column;
    gap: 1.5rem;
  }

  /* 移动端：索引变为水平滚动条 */
  .faq-index {
    position: relative;
    top: 0;
    flex: none;
    width: 100%;
    padding: 1rem 0.8rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    background: rgba(245, 230, 208, 0.06);
    border-radius: var(--faq-radius-pill);
  }

  .faq-index-list {
    flex-direction: row;
    gap: 0.3rem;
    min-width: max-content;
  }

  .faq-index-link {
    white-space: nowrap;
    padding: 0.45rem 1rem;
    font-size: 0.8rem;
    background: rgba(255, 107, 53, 0.08);
    border-radius: var(--faq-radius-pill);
  }

  .faq-index-title {
    display: none;
  }

  .index-icon {
    width: 18px;
    height: 18px;
  }

  /* 主内容 */
  .faq-page-title {
    font-size: 2rem;
  }

  .faq-page-desc {
    font-size: 0.95rem;
    margin-bottom: 1.8rem;
  }

  .faq-section-title {
    font-size: 1.3rem;
  }

  .faq-question {
    padding: 0.85rem 1rem;
    font-size: 0.92rem;
  }

  .faq-answer {
    padding: 0 1rem;
  }

  .faq-answer-inner {
    font-size: 0.88rem;
    padding: 0.8rem 0 1rem 0;
  }

  .faq-q-marker {
    width: 24px;
    height: 24px;
    font-size: 0.7rem;
  }

  .faq-card {
    border-radius: var(--faq-radius);
  }

  .faq-inline-img {
    width: 100% !important;
    height: auto !important;
    max-width: 250px;
  }

  .faq-more-help {
    padding: 1rem 1.2rem;
    font-size: 0.88rem;
    border-radius: var(--faq-radius);
  }
}

/* ===== 桌面微调 ===== */
@media (min-width: 769px) {
  .faq-index {
    max-height: calc(100vh - 4rem);
    overflow-y: auto;
  }

  .faq-index-link {
    font-size: 0.9rem;
  }
}

/* ===== 宽屏优化 ===== */
@media (min-width: 1200px) {
  .faq-layout {
    gap: 3.5rem;
  }

  .faq-index {
    flex-basis: 220px;
    padding: 1.8rem 1.2rem;
  }

  .faq-page-title {
    font-size: 3.2rem;
  }
}

/* ===== 高对比度支持 ===== */
@media (prefers-contrast: high) {
  .faq-card {
    border: 2px solid var(--color-bg-deep, #1A1A2E);
  }

  .faq-question {
    border-bottom: 1px solid currentColor;
  }

  .faq-index-link {
    border: 1px solid currentColor;
  }
}

/* ===== 减少动效 ===== */
@media (prefers-reduced-motion: reduce) {
  .faq-answer {
    transition: none;
  }

  .faq-chevron {
    transition: none;
  }

  .faq-index-link {
    transition: none;
  }

  .faq-card {
    transition: none;
  }
}