.page-faq {
  --faq-arrow-size: 1rem;
  --faq-arrow-offset: 0.5rem;
  --faq-border-color: var(--color-secondary, #B0BEC5);
  --faq-bg-expanded: var(--color-primary-light, #C8E6C9);
  --faq-trigger-hover: var(--color-accent-light, #FFCCBC);
  --faq-hero-bg: var(--color-dark, #121212);
  --faq-hero-text: var(--color-light, #FFFFFF);
  background: var(--color-light, #FFFFFF);
  color: var(--color-dark, #121212);
  font-family: var(--font-body, 'Inter', 'Open Sans', Arial, sans-serif);
  line-height: 1.6;
}

/* ── 面包屑 ── */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: var(--size-small, 0.8rem);
  color: var(--color-secondary, #B0BEC5);
  margin-bottom: 0.75rem;
  padding: 0.5rem 0;
}

.page-faq .breadcrumb a {
  color: var(--color-secondary, #B0BEC5);
  text-decoration: none;
  transition: color var(--transition-fast, 150ms ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus {
  color: var(--color-accent, #FF5722);
  outline: none;
}

.page-faq .breadcrumb__sep {
  margin: 0 0.25rem;
  user-select: none;
}

/* ── Hero 区域 ── */
.page-faq .faq-hero {
  background: var(--faq-hero-bg);
  color: var(--faq-hero-text);
  padding: 2rem 0 2.5rem;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: '';
  position: absolute;
  right: -5%;
  top: -20%;
  width: 30vw;
  height: 30vw;
  background: radial-gradient(circle, var(--color-primary, #2E7D32) 0%, transparent 70%);
  opacity: 0.25;
  pointer-events: none;
  border-radius: 50%;
}

.page-faq .faq-hero__title {
  font-family: var(--font-heading, 'Inter', 'Helvetica Neue', Arial, sans-serif);
  font-weight: var(--weight-bold, 900);
  font-style: italic;
  font-size: var(--size-title1, 2.5rem);
  line-height: 1.15;
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__desc {
  font-size: var(--size-body, 1rem);
  color: var(--color-secondary, #B0BEC5);
  max-width: 48rem;
  position: relative;
  z-index: 1;
  margin: 0;
}

.page-faq .faq-hero__link {
  color: var(--color-accent, #FF5722);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast, 150ms ease);
}

.page-faq .faq-hero__link:hover,
.page-faq .faq-hero__link:focus {
  color: var(--color-primary, #2E7D32);
}

/* ── 手风琴列表 ── */
.page-faq .faq-list {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 56rem;
  margin-left: auto;
  margin-right: auto;
}

/* ── 单个项目 ── */
.page-faq .faq-item {
  background: var(--color-secondary, #B0BEC5);
  border: 1px solid rgba(18, 18, 18, 0.1);
  border-radius: var(--radius, 4px);
  box-shadow: var(--shadow-card, 0 2px 8px rgba(0,0,0,0.08));
  transition: box-shadow var(--transition-base, 300ms ease), border-color var(--transition-base, 300ms ease);
  overflow: hidden;
}

.page-faq .faq-item:hover {
  box-shadow: var(--shadow-lift, 0 8px 24px rgba(0,0,0,0.12));
}

.page-faq .faq-item[data-visible="true"] {
  border-color: var(--color-primary, #2E7D32);
}

/* ── 触发按钮 ── */
.page-faq .faq-item__trigger {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1rem 1.25rem;
  background: transparent;
  border: none;
  cursor: pointer;
  font: inherit;
  color: var(--color-dark, #121212);
  text-align: left;
  transition: background var(--transition-fast, 150ms ease);
  position: relative;
}

.page-faq .faq-item__trigger:hover,
.page-faq .faq-item__trigger:focus-visible {
  background: var(--faq-trigger-hover);
  outline: none;
}

.page-faq .faq-item__trigger:focus-visible {
  outline: 2px solid var(--color-accent, #FF5722);
  outline-offset: -2px;
}

/* ── 箭头 ── */
.page-faq .faq-item__arrow {
  flex-shrink: 0;
  width: var(--faq-arrow-size);
  height: var(--faq-arrow-size);
  background: var(--color-accent, #FF5722);
  clip-path: polygon(50% 15%, 85% 85%, 50% 60%, 15% 85%);
  transition: transform var(--transition-base, 300ms ease), background var(--transition-fast, 150ms ease);
  transform: rotate(0deg);
}

.page-faq .faq-item[data-visible="true"] .faq-item__arrow {
  transform: rotate(180deg);
  background: var(--color-primary, #2E7D32);
}

/* ── 问题标题 ── */
.page-faq .faq-item__question {
  font-family: var(--font-heading, 'Inter', 'Helvetica Neue', Arial, sans-serif);
  font-weight: var(--weight-bold, 900);
  font-style: italic;
  font-size: var(--size-body, 1rem);
  line-height: 1.3;
  margin: 0;
  letter-spacing: -0.01em;
}

@media (min-width: 640px) {
  .page-faq .faq-item__question {
    font-size: var(--size-title2, 1.5rem);
  }
}

/* ── 内容区域 ── */
.page-faq .faq-item__content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-base, 300ms ease);
  background: var(--faq-bg-expanded);
  border-top: 1px solid transparent;
}

.page-faq .faq-item[data-visible="true"] .faq-item__content {
  grid-template-rows: 1fr;
  border-top-color: var(--color-primary, #2E7D32);
}

.page-faq .faq-item__content[role="region"] {
  overflow: hidden;
}

.page-faq .faq-item__content > * {
  min-height: 0;
}

/* ── 内容内边距 ── */
.page-faq .faq-item[data-visible="true"] .faq-item__text,
.page-faq .faq-item[data-visible="true"] .faq-item__figure {
  padding: 1.25rem;
}

.page-faq .faq-item__text,
.page-faq .faq-item__figure {
  padding: 0 1.25rem;
  transition: padding var(--transition-base, 300ms ease);
}

/* ── 文字内容 ── */
.page-faq .faq-item__text {
  font-size: var(--size-body, 1rem);
  color: var(--color-dark, #121212);
  line-height: 1.7;
}

.page-faq .faq-item__text p {
  margin: 0 0 0.75rem;
}

.page-faq .faq-item__text p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__update {
  font-size: var(--size-small, 0.8rem);
  color: var(--color-gray, #424242);
  font-style: italic;
}

.page-faq .faq-link {
  color: var(--color-accent, #FF5722);
  text-decoration: underline;
  text-underline-offset: 2px;
  font-weight: var(--weight-bold, 900);
  transition: color var(--transition-fast, 150ms ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus {
  color: var(--color-primary, #2E7D32);
}

/* ── 图片 ── */
.page-faq .faq-item__figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-faq .faq-item__img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius, 4px);
  border: 1px solid rgba(18, 18, 18, 0.08);
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.page-faq .faq-item__caption {
  font-size: var(--size-small, 0.8rem);
  color: var(--color-gray, #424242);
  font-style: italic;
  line-height: 1.4;
}

@media (min-width: 640px) {
  .page-faq .faq-item[data-visible="true"] .faq-item__content {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
  }

  .page-faq .faq-item[data-visible="true"] .faq-item__text {
    flex: 1;
    padding: 1.5rem;
  }

  .page-faq .faq-item[data-visible="true"] .faq-item__figure {
    flex-shrink: 0;
    width: 280px;
    padding: 1.5rem 1.5rem 1.5rem 0;
  }

  .page-faq .faq-item__figure {
    max-width: 280px;
  }

  .page-faq .faq-item__img {
    width: 100%;
  }
}

/* ── CTA 区域 ── */
.page-faq .faq-cta {
  background: var(--color-dark, #121212);
  color: var(--color-light, #FFFFFF);
  padding: 2.5rem 0;
  text-align: center;
}

.page-faq .faq-cta__text {
  font-size: var(--size-body, 1rem);
  margin: 0 0 1.25rem;
  font-weight: var(--weight-bold, 900);
}

.page-faq .faq-cta .btn-primary {
  background: var(--color-primary, #2E7D32);
  color: var(--color-light, #FFFFFF);
  padding: 0.75rem 2rem;
  border: none;
  border-radius: var(--radius, 4px);
  font-family: var(--font-heading, 'Inter', 'Helvetica Neue', Arial, sans-serif);
  font-weight: var(--weight-bold, 900);
  font-style: italic;
  font-size: var(--size-body, 1rem);
  text-decoration: none;
  display: inline-block;
  transition: transform var(--transition-fast, 150ms ease), box-shadow var(--transition-fast, 150ms ease);
  cursor: pointer;
}

.page-faq .faq-cta .btn-primary:hover,
.page-faq .faq-cta .btn-primary:focus {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(46, 125, 50, 0.4);
}

/* ── 移动端优先：窄屏优化 ── */
@media (max-width: 399px) {
  .page-faq .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .page-faq .faq-hero__title {
    font-size: 1.5rem;
  }

  .page-faq .faq-item__trigger {
    padding: 0.75rem 1rem;
  }

  .page-faq .faq-item[data-visible="true"] .faq-item__text,
  .page-faq .faq-item[data-visible="true"] .faq-item__figure {
    padding: 1rem;
  }

  .page-faq .faq-item__img {
    max-height: 180px;
  }
}

/* ── 桌面断点 ── */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 3rem 0 3.5rem;
  }

  .page-faq .faq-hero__title {
    font-size: 3rem;
  }

  .page-faq .faq-list {
    padding-top: 3rem;
    padding-bottom: 3rem;
    gap: 1rem;
  }

  .page-faq .faq-item__trigger {
    padding: 1.25rem 1.75rem;
  }

  .page-faq .faq-cta {
    padding: 3rem 0;
  }
}

/* ── data-fade-in 出场动画（渐进增强） ── */
.page-faq [data-fade-in] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.page-faq [data-fade-in][data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

/* ── 无 JavaScript 时内容完整可读 ── */
.page-faq .faq-item__content {
  grid-template-rows: 1fr;
}

.page-faq .faq-item__text,
.page-faq .faq-item__figure {
  padding: 1.25rem;
}

.page-faq .faq-item__content {
  border-top-color: var(--color-primary, #2E7D32);
}
</main>