/* ===== page-faq 专属样式 ===== */
.page-faq {
  --faq-accent: var(--accent);
  --faq-accent-glass: rgba(255, 107, 53, 0.12);
  --faq-border-subtle: rgba(255, 255, 255, 0.06);
  --faq-border-hover: rgba(255, 107, 53, 0.25);
  --faq-radius: 12px;
  --faq-gap: 1.25rem;
  --faq-nav-width: 220px;

  padding: 2rem 1rem 3rem;
  max-width: var(--content-max);
  margin: 0 auto;
  color: var(--text-primary);
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  letter-spacing: 0.02em;
}
.page-faq .breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--faq-accent);
}
.page-faq .breadcrumb .separator {
  color: var(--text-muted);
  opacity: 0.5;
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--text-primary);
  font-weight: 500;
}

/* 页面头部 */
.page-faq__intro {
  margin-bottom: 2.25rem;
}
.page-faq__title {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 8vw, 4.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin: 0 0 0.3rem;
}
.page-faq__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0 0 1.5rem;
  max-width: 38rem;
  line-height: 1.5;
}

/* 搜索框 */
.page-faq__search-wrap {
  position: relative;
  max-width: 520px;
}
.page-faq__search-ico {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-faq__search {
  display: block;
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 2.9rem;
  background: var(--bg-card);
  border: 1px solid var(--faq-border-subtle);
  border-radius: 60px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}
.page-faq__search::placeholder {
  color: var(--text-muted);
  opacity: 0.8;
}
.page-faq__search:focus {
  border-color: var(--faq-accent);
  box-shadow: 0 0 0 3px var(--faq-accent-glass);
}

/* 主体布局 */
.page-faq__layout {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap);
}

/* 导航（移动端横向标签） */
.page-faq__nav {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-bottom: 0.5rem;
}
.page-faq__nav::-webkit-scrollbar {
  display: none;
}
.page-faq__nav-list {
  display: flex;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
  list-style: none;
  flex-wrap: nowrap;
  min-width: max-content;
}
.page-faq__nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  background: var(--bg-card);
  border: 1px solid var(--faq-border-subtle);
  border-radius: 40px;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}
.page-faq__nav-link:hover,
.page-faq__nav-link:focus-visible {
  background: var(--faq-accent-glass);
  color: var(--faq-accent);
  border-color: var(--faq-border-hover);
}
.page-faq__nav-link:active {
  transform: scale(0.97);
}
.page-faq__nav-num {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  opacity: 0.6;
}

/* 面板容器 */
.page-faq__panels {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* 每个区块 */
.page-faq__section {
  scroll-margin-top: 5rem;
}
.page-faq__section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0 0 1.25rem;
  letter-spacing: 0.01em;
  line-height: 1.1;
}
.page-faq__section-num {
  font-size: 1.1em;
  background: var(--faq-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.9;
}

/* 折叠面板 */
.page-faq__panel {
  background: var(--bg-card);
  border: 1px solid var(--faq-border-subtle);
  border-radius: var(--faq-radius);
  margin-bottom: 0.65rem;
  transition: border-color var(--transition-med);
  overflow: hidden;
}
.page-faq__panel[open] {
  border-color: var(--faq-border-hover);
}

.page-faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.4;
  transition: background var(--transition-fast), color var(--transition-fast);
  user-select: none;
}
.page-faq__question::-webkit-details-marker {
  display: none;
}
.page-faq__question:hover {
  background: rgba(255, 255, 255, 0.03);
}
.page-faq__panel[open] .page-faq__question {
  color: var(--faq-accent);
  background: var(--faq-accent-glass);
}
.page-faq__q-text {
  flex: 1;
  min-width: 0;
}
.page-faq__q-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--transition-med);
}
.page-faq__q-icon::before,
.page-faq__q-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-med), opacity var(--transition-fast);
}
.page-faq__q-icon::before {
  width: 2px;
  height: 14px;
}
.page-faq__q-icon::after {
  width: 14px;
  height: 2px;
}
.page-faq__panel[open] .page-faq__q-icon::before {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}
.page-faq__panel[open] .page-faq__q-icon {
  transform: rotate(180deg);
}

/* 答案内容 */
.page-faq__answer {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  padding: 0 1.25rem;
  transition: max-height 0.45s ease, opacity 0.35s ease, padding 0.3s ease;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}
details[open] .page-faq__answer {
  max-height: 800px;
  opacity: 1;
  padding: 0.25rem 1.25rem 1.25rem;
}
.page-faq__answer p {
  margin: 0.75rem 0;
}
.page-faq__answer p:first-child {
  margin-top: 0;
}

.page-faq__more-link {
  font-size: 0.9rem;
  margin-top: 0.75rem;
}
.page-faq__more-link a {
  color: var(--faq-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}
.page-faq__more-link a:hover,
.page-faq__more-link a:focus-visible {
  color: var(--faq-accent-light);
  text-decoration: underline;
}

/* 图片 */
.page-faq__figure {
  margin: 1.5rem 0 0;
  border-radius: var(--faq-radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--faq-border-subtle);
}
.page-faq__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq__figcap {
  padding: 0.6rem 1rem 0.8rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  border-top: 1px solid var(--faq-border-subtle);
}

/* 底部相关链接 */
.page-faq__related {
  margin-top: 3rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--faq-border-subtle);
  border-radius: var(--faq-radius);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.page-faq__related a {
  color: var(--faq-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}
.page-faq__related a:hover,
.page-faq__related a:focus-visible {
  color: var(--faq-accent-light);
  text-decoration: underline;
}
.page-faq__related-line {
  display: block;
  width: 40px;
  height: 3px;
  background: var(--faq-accent-gradient);
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

/* 响应式：桌面端 ≥768px */
@media (min-width: 768px) {
  .page-faq {
    padding: 2.5rem 2rem 4rem;
  }
  .page-faq__layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }

  /* 侧边导航 */
  .page-faq__nav {
    flex-shrink: 0;
    width: var(--faq-nav-width);
    position: sticky;
    top: calc(var(--header-height, 80px) + 2rem);
    overflow: visible;
    margin-bottom: 0;
  }
  .page-faq__nav-list {
    flex-direction: column;
    gap: 0.4rem;
    min-width: auto;
  }
  .page-faq__nav-link {
    padding: 0.6rem 1rem;
    border-radius: 8px;
    background: transparent;
    border: 1px solid transparent;
    font-size: 0.9rem;
    white-space: normal;
  }
  .page-faq__nav-link:hover,
  .page-faq__nav-link:focus-visible {
    background: var(--faq-accent-glass);
    border-color: var(--faq-border-hover);
  }
  .page-faq__nav-num {
    font-size: 0.8rem;
  }

  /* 面板区域 */
  .page-faq__panels {
    flex: 1;
    min-width: 0;
  }

  .page-faq__question {
    padding: 1.1rem 1.5rem;
    font-size: 1.05rem;
  }
  .page-faq__answer {
    padding: 0 1.5rem;
  }
  details[open] .page-faq__answer {
    padding: 0.25rem 1.5rem 1.5rem;
  }

  /* 图片适度约束 */
  .page-faq__figure {
    max-width: 90%;
  }
}

/* 响应式：大桌面 ≥1024px */
@media (min-width: 1024px) {
  .page-faq {
    padding: 3rem 2.5rem 5rem;
  }
  .page-faq__nav {
    width: 240px;
  }
  .page-faq__figure {
    max-width: 80%;
  }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  .page-faq__answer,
  .page-faq__q-icon,
  .page-faq__q-icon::before,
  .page-faq__q-icon::after,
  .page-faq__panel,
  .page-faq__nav-link,
  .page-faq__question {
    transition: none !important;
  }
}

.page-faq {
  --faq-accent-gradient: transparent;
  --faq-accent-light: currentColor;
}