/* =============================================
   page-faq – 帮助中心专属样式
   作用域限定：.page-faq
   移动端优先 + 桌面增强
   ============================================= */
.page-faq {
  --faq-gap: 24px;
  --faq-sidebar-w: 240px;
  --faq-cat-gap: 32px;
  --faq-border: rgba(255, 255, 255, 0.08);
  --faq-gold-line: #C9A96E;
  --faq-primary-bg: #B22222;
  --faq-primary-text: #FFFFFF;
  --faq-answer-bg: #F5F5F5;
  --faq-shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
  --faq-shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.4);
  --faq-radius: 6px;
  --faq-transition: 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);

  background-color: var(--color-bg, #1A1A1A);
  color: var(--color-white, #FFFFFF);
  padding: 40px 0 80px;
  font-family: var(--font-body, Inter, 'Noto Sans SC', sans-serif);
}

/* ---------- 容器 ---------- */
.page-faq .container {
  max-width: var(--container-max, 1280px);
  margin: 0 auto;
  padding: 0 var(--container-pad, 24px);
}

.page-faq__inner {
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--color-gray, #888888);
}

.page-faq .breadcrumb__link {
  color: var(--color-gray, #888888);
  text-decoration: none;
  transition: color var(--faq-transition);
}

.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--color-gold, #C9A96E);
  outline: none;
}

.page-faq .breadcrumb__sep {
  color: var(--color-gray, #888888);
  font-size: 16px;
  user-select: none;
}

.page-faq .breadcrumb__current {
  color: var(--color-white, #FFFFFF);
  font-weight: 500;
}

/* ---------- 标题区 ---------- */
.page-faq__hero {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
}

.page-faq__hero-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(201, 169, 110, 0.15);
  padding: 6px;
  object-fit: contain;
  margin-top: 4px;
}

.page-faq__hero-text {
  flex: 1;
}

.page-faq__title {
  font-family: var(--font-heading, Inter, 'Noto Sans SC', sans-serif);
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--color-primary, #B22222);
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.page-faq__subtitle {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-white, #FFFFFF);
  opacity: 0.85;
  margin: 0;
}

.page-faq__subtitle strong {
  color: var(--color-gold, #C9A96E);
  font-weight: 600;
}

/* ---------- 搜索框 ---------- */
.page-faq__search-wrap {
  position: relative;
  margin-bottom: 36px;
  max-width: 520px;
}

.page-faq__search-input {
  display: block;
  width: 100%;
  padding: 12px 44px 12px 16px;
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-white, #FFFFFF);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  outline: none;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  box-sizing: border-box;
}

.page-faq__search-input::placeholder {
  color: var(--color-gray, #888888);
  opacity: 0.7;
}

.page-faq__search-input:focus {
  border-color: var(--color-gold, #C9A96E);
  box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.15);
}

.page-faq__search-icon {
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  color: var(--color-gray, #888888);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- 布局：侧边栏 + 主内容 ---------- */
.page-faq__layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ---------- 侧边栏 ---------- */
.page-faq__sidebar {
  flex-shrink: 0;
  width: 100%;
}

.page-faq__sidebar-title {
  font-family: var(--font-heading, Inter, 'Noto Sans SC', sans-serif);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-gold, #C9A96E);
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.page-faq__category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq__category-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  font-size: 0.875rem;
  line-height: 1.4;
  font-weight: 500;
  color: var(--color-white, #FFFFFF);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--faq-border);
  border-radius: 20px;
  text-decoration: none;
  transition: background var(--faq-transition), border-color var(--faq-transition), color var(--faq-transition);
  white-space: nowrap;
}

.page-faq__category-link:hover,
.page-faq__category-link:focus-visible {
  background: rgba(178, 34, 34, 0.15);
  border-color: var(--color-primary, #B22222);
  color: var(--color-primary, #B22222);
  outline: none;
}

.page-faq__category-link--active {
  background: var(--color-primary, #B22222);
  border-color: var(--color-primary, #B22222);
  color: var(--faq-primary-text);
}

.page-faq__category-link--active:hover {
  background: var(--color-primary-dark, #8B0000);
  border-color: var(--color-primary-dark, #8B0000);
  color: var(--faq-primary-text);
}

.page-faq__cat-count {
  font-size: 0.75rem;
  opacity: 0.7;
  font-weight: 400;
}

.page-faq__sidebar-total {
  margin: 16px 0 0;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-gray, #888888);
}

.page-faq__sidebar-total strong {
  color: var(--color-gold, #C9A96E);
  font-weight: 600;
}

/* ---------- 移动端分类标签 ---------- */
.page-faq__mobile-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-faq__mobile-cats .tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1.4;
  border-radius: 16px;
  text-decoration: none;
  background: rgba(178, 34, 34, 0.12);
  color: var(--color-primary, #B22222);
  border: 1px solid rgba(178, 34, 34, 0.25);
  transition: background var(--faq-transition);
}

.page-faq__mobile-cats .tag:hover {
  background: rgba(178, 34, 34, 0.2);
}

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

/* ---------- 分类区块 ---------- */
.page-faq__category {
  margin-bottom: var(--faq-cat-gap);
  scroll-margin-top: 120px;
}

.page-faq__cat-heading {
  font-family: var(--font-heading, Inter, 'Noto Sans SC', sans-serif);
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gold, #C9A96E);
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--faq-gold-line);
  display: inline-block;
}

/* ---------- 折叠列表 ---------- */
.page-faq__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-faq__item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  overflow: hidden;
}

.page-faq__item:hover {
  border-color: rgba(201, 169, 110, 0.2);
}

/* ---------- 问题标题（可点击） ---------- */
.page-faq__question {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--faq-transition);
}

.page-faq__question:hover {
  background: rgba(255, 255, 255, 0.03);
}

.page-faq__question:focus-visible {
  outline: 2px solid var(--color-gold, #C9A96E);
  outline-offset: -2px;
  border-radius: var(--faq-radius);
}

.page-faq__q-mark {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--faq-primary-text);
  background: var(--color-primary, #B22222);
  border-radius: 50%;
  line-height: 1;
}

.page-faq__q-text {
  flex: 1;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.4;
  color: var(--color-white, #FFFFFF);
}

.page-faq__q-arrow {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  color: var(--color-gray, #888888);
  transition: transform var(--faq-transition), color var(--faq-transition);
}

.page-faq__question[aria-expanded="true"] .page-faq__q-arrow {
  transform: rotate(90deg);
  color: var(--color-gold, #C9A96E);
}

/* ---------- 答案区域 ---------- */
.page-faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.25, 0.1, 0.25, 1), opacity 0.3s ease;
  opacity: 0;
}

.page-faq__answer-inner {
  padding: 0 16px 16px 54px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

.page-faq__answer-inner p {
  margin: 0 0 8px;
}

.page-faq__answer-inner p:last-child {
  margin-bottom: 0;
}

.page-faq__answer-inner a {
  color: var(--color-gold, #C9A96E);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--faq-transition);
}

.page-faq__answer-inner a:hover {
  color: var(--color-gold-light, #D4AF37);
}

.page-faq__answer-inner strong {
  color: var(--color-gold, #C9A96E);
  font-weight: 600;
}

/* 展开态 */
.page-faq__question[aria-expanded="true"] + .page-faq__answer {
  max-height: 600px;
  opacity: 1;
}

.page-faq__question[aria-expanded="true"] {
  background: rgba(178, 34, 34, 0.06);
}

/* ---------- 内联图片 ---------- */
.page-faq__inline-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--faq-radius);
  margin: 12px 0 4px;
  border: 1px solid var(--faq-border);
  object-fit: cover;
  background: var(--color-light, #F5F5F5);
}

/* ---------- 联系客服区 ---------- */
.page-faq__contact {
  margin-top: 48px;
  padding: 32px 24px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
}

.page-faq__contact-title {
  font-family: var(--font-heading, Inter, 'Noto Sans SC', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gold, #C9A96E);
  margin: 0 0 8px;
}

.page-faq__contact-desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.75);
  margin: 0 0 20px;
}

.page-faq__contact-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.page-faq__contact-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
  transition: border-color var(--faq-transition);
}

.page-faq__contact-card:hover {
  border-color: rgba(201, 169, 110, 0.25);
}

.page-faq__contact-icon {
  color: var(--color-gold, #C9A96E);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
}

.page-faq__contact-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray, #888888);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
}

.page-faq__contact-value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-white, #FFFFFF);
  text-decoration: none;
  transition: color var(--faq-transition);
}

.page-faq__contact-value:hover {
  color: var(--color-gold, #C9A96E);
}

.page-faq__contact-note {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--color-gray, #888888);
  margin: 2px 0 0;
}

.page-faq__contact-ps {
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}

.page-faq__contact-link {
  color: var(--color-gold, #C9A96E);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-faq__contact-link:hover {
  color: var(--color-gold-light, #D4AF37);
}

/* =============================================
   桌面端 (≥768px)
   ============================================= */
@media (min-width: 768px) {
  .page-faq {
    padding: 56px 0 100px;
  }

  .page-faq__hero {
    gap: 20px;
    margin-bottom: 40px;
  }

  .page-faq__hero-icon {
    width: 48px;
    height: 48px;
    padding: 8px;
  }

  .page-faq__search-wrap {
    max-width: 460px;
    margin-bottom: 44px;
  }

  /* 侧边栏 + 主内容左右布局 */
  .page-faq__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
  }

  .page-faq__sidebar {
    width: var(--faq-sidebar-w);
    position: sticky;
    top: 120px;
    flex-shrink: 0;
  }

  .page-faq__category-list {
    flex-direction: column;
    gap: 4px;
  }

  .page-faq__category-link {
    padding: 8px 16px;
    border-radius: var(--faq-radius);
    white-space: normal;
    font-size: 0.875rem;
    border-color: transparent;
    background: transparent;
    color: rgba(255, 255, 255, 0.75);
  }

  .page-faq__category-link:hover {
    background: rgba(178, 34, 34, 0.08);
    color: var(--color-primary, #B22222);
    border-color: transparent;
  }

  .page-faq__category-link--active {
    background: rgba(178, 34, 34, 0.12);
    border-color: var(--color-primary, #B22222);
    color: var(--color-primary, #B22222);
  }

  .page-faq__category-link--active:hover {
    background: rgba(178, 34, 34, 0.18);
  }

  .page-faq__sidebar-total {
    margin-top: 20px;
  }

  .page-faq__mobile-cats {
    display: none;
  }

  .page-faq__main {
    flex: 1;
    min-width: 0;
  }

  .page-faq__question {
    padding: 16px 20px;
  }

  .page-faq__answer-inner {
    padding: 0 20px 20px 64px;
  }

  .page-faq__contact {
    padding: 40px 32px;
  }

  .page-faq__contact-grid {
    flex-direction: row;
    gap: 24px;
  }

  .page-faq__contact-card {
    flex: 1;
    padding: 20px;
  }

  .page-faq__contact-title {
    font-size: 1.375rem;
  }
}

/* =============================================
   大桌面端 (≥1024px)
   ============================================= */
@media (min-width: 1024px) {
  .page-faq {
    padding: 64px 0 120px;
  }

  .page-faq__layout {
    gap: 56px;
  }

  .page-faq__sidebar {
    width: 260px;
  }

  .page-faq__cat-heading {
    font-size: 1.5rem;
  }

  .page-faq__q-text {
    font-size: 1rem;
  }

  .page-faq__answer-inner {
    font-size: 0.9375rem;
  }

  .page-faq__contact-grid {
    gap: 32px;
  }
}

/* =============================================
   prefers-reduced-motion 兼容
   ============================================= */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-faq__answer {
    transition: none;
  }

  .page-faq__question[aria-expanded="true"] + .page-faq__answer {
    max-height: none;
    opacity: 1;
  }

  .page-faq__q-arrow {
    transition: none;
  }
}

/* =============================================
   滚动显现快照（无 JS 时静态可见）
   ============================================= */
.page-faq [data-reveal] {
  opacity: 1;
  transform: none;
}

/* =============================================
   工具类：只读辅助
   ============================================= */
.page-faq .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}