.page-faq {
  --faq-bg: var(--color-deep-blue);
  --faq-index-bg: var(--color-dark-blue);
  --faq-index-active-bg: var(--color-fire);
  --faq-index-active-text: var(--color-white);
  --faq-border: var(--color-gray);
  --faq-answer-bg: var(--color-black);
  --faq-answer-text: var(--color-white);
  --faq-accent: var(--color-fire);
  --faq-green: var(--color-green);
  font-family: var(--font-body);
  background-color: var(--faq-bg);
  color: var(--color-white);
  padding: calc(var(--header-height) + 24px) 16px 48px;
  min-height: 100vh;
}
.page-faq .faq-breadcrumb {
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--color-gray);
}
.page-faq .faq-breadcrumb a {
  color: var(--faq-accent);
}
.page-faq .faq-breadcrumb .breadcrumb__separator {
  margin: 0 8px;
}
.page-faq .page-heading {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: 1px;
  margin-bottom: 8px;
  line-height: 1.1;
}
.page-faq .page-desc {
  font-size: 16px;
  margin-bottom: 32px;
  color: var(--color-gray);
  line-height: 1.6;
}
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.page-faq .faq-index {
  background: var(--faq-index-bg);
  border: 3px solid var(--faq-border);
  border-radius: 8px;
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-faq .faq-index__item {
  flex: 1 1 100%;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  text-decoration: none;
  color: var(--color-white);
  border-radius: 8px;
  transition: background-color 0.25s ease, border-color 0.25s ease;
  border: 3px solid transparent;
  font-size: 16px;
  font-weight: 600;
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background-color: var(--faq-index-active-bg);
  color: var(--faq-index-active-text);
  border-color: var(--faq-index-active-bg);
}
.page-faq .faq-index__item.is-active .faq-index__link {
  background-color: var(--faq-index-active-bg);
  color: var(--faq-index-active-text);
  border-color: var(--faq-index-active-bg);
}
.page-faq .faq-index__icon {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
}
.page-faq .faq-content {
  flex: 1;
}
.page-faq .faq-category {
  margin-bottom: 40px;
}
.page-faq .faq-category__title {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  font-style: italic;
  color: var(--faq-accent);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--faq-accent);
  display: inline-block;
}
.page-faq .faq-list {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-faq .faq-item {
  border: 3px solid var(--faq-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.page-faq .faq-item:hover,
.page-faq .faq-item:focus-within {
  border-color: var(--faq-accent);
  transform: translateY(-2px);
}
.page-faq .faq-question {
  background: var(--faq-index-bg);
  color: var(--color-white);
  padding: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  outline: none;
  transition: background-color 0.25s ease;
}
.page-faq .faq-question:hover,
.page-faq .faq-question:focus-visible {
  background-color: var(--faq-accent);
  color: var(--color-white);
}
.page-faq .faq-question__icon {
  width: 24px;
  height: 24px;
  line-height: 24px;
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--faq-accent);
  flex-shrink: 0;
  transition: transform 0.25s ease, color 0.25s ease;
}
.page-faq .faq-question[aria-expanded="true"] .faq-question__icon {
  transform: rotate(45deg);
  color: var(--faq-green);
}
.page-faq .faq-question__text {
  flex: 1;
}
.page-faq .faq-answer {
  background: var(--faq-answer-bg);
  color: var(--faq-answer-text);
  padding: 0 16px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  line-height: 1.6;
  font-size: 15px;
}
.page-faq .faq-answer[aria-hidden="false"] {
  max-height: 800px;
  padding: 16px;
}
.page-faq .faq-answer a {
  color: var(--faq-accent);
}
.page-faq .faq-answer__img {
  width: 100%;
  max-width: 600px;
  height: auto;
  margin-top: 12px;
  border-radius: 6px;
  border: 2px solid var(--faq-border);
}
.page-faq .faq-contact-block {
  margin-top: 32px;
  padding: 16px;
  background: var(--faq-index-bg);
  border: 3px solid var(--faq-accent);
  border-radius: 8px;
  text-align: center;
  font-size: 16px;
  color: var(--color-white);
}
.page-faq .faq-contact-block a {
  color: var(--faq-accent);
  font-weight: 700;
}

/* 桌面端布局 */
@media (min-width: 768px) {
  .page-faq {
    padding: calc(var(--header-height) + 32px) 24px 64px;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 32px;
  }
  .page-faq .faq-index {
    flex: 0 0 240px;
    position: sticky;
    top: calc(var(--header-height) + 24px);
    padding: 24px 16px;
  }
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 8px;
  }
  .page-faq .faq-index__item {
    flex: auto;
  }
  .page-faq .faq-index__link {
    padding: 10px 12px;
    font-size: 15px;
  }
  .page-faq .faq-index__icon {
    width: 32px;
    height: 32px;
  }
  .page-faq .faq-content {
    flex: 1;
    min-width: 0;
  }
  .page-faq .page-heading {
    font-size: 40px;
  }
  .page-faq .page-desc {
    font-size: 18px;
  }
  .page-faq .faq-category__title {
    font-size: 28px;
  }
  .page-faq .faq-question {
    font-size: 17px;
    padding: 18px;
  }
  .page-faq .faq-answer {
    font-size: 16px;
  }
  .page-faq .faq-answer[aria-hidden="false"] {
    padding: 18px;
  }
}