.page-faq {
  --tag-color: var(--c-primary);
  --tag-color-text: #ffffff;
  --faq-index-w: 16.5rem;
  background:
    linear-gradient(180deg, rgba(27, 78, 158, 0.045) 0, rgba(255, 255, 255, 0) 320px);
}

/* 面包屑与首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: 1.5rem 0 2.5rem;
  overflow: hidden;
  border-bottom: 1px solid rgba(27, 78, 158, 0.10);
}

.page-faq .faq-hero::after {
  content: '';
  position: absolute;
  right: -4rem;
  top: -3rem;
  width: 20rem;
  height: 20rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(27, 78, 158, 0.08) 0, rgba(245, 179, 1, 0.04) 55%, transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__main {
  max-width: 49rem;
}

.page-faq .faq-hero .page-title {
  margin-top: 0.375rem;
}

.page-faq .faq-hero__lead {
  max-width: 42rem;
  margin-top: 1rem;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-hero__aside {
  align-self: end;
  background: var(--c-snow);
  border: 1px solid rgba(27, 78, 158, 0.10);
  border-left: 3px solid var(--c-accent);
  border-radius: 1rem;
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-faq .faq-hero__aside-title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--c-primary-dark);
  margin-bottom: 0.25rem;
}

.page-faq .faq-hero__aside a {
  color: var(--c-primary);
  text-decoration: none;
}

.page-faq .faq-hero__aside a:hover {
  text-decoration: underline;
}

/* 主体布局 */
.page-faq .faq-layout {
  padding: 2.5rem 0 0;
}

/* 左侧快速索引 */
.page-faq .faq-index__card {
  background: var(--c-snow);
  border: 1px solid rgba(27, 78, 158, 0.10);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.125rem;
}

.page-faq .faq-index__title {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-bottom: 0.875rem;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.375rem;
  list-style: none;
  margin: 0;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  padding: 0.625rem 0.875rem;
  border-radius: 999px;
  background: var(--c-surface);
  border: 1px solid rgba(27, 78, 158, 0.12);
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--c-text);
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-index__link:hover {
  border-color: var(--c-primary);
  background: var(--c-highlight);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  color: var(--c-primary);
  font-weight: 800;
  font-size: 0.75rem;
}

.page-faq .faq-index__foot {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(27, 78, 158, 0.10);
}

.page-faq .btn--block {
  display: flex;
  justify-content: center;
  width: 100%;
}

/* 右侧答案区 */
.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: 2rem;
  margin-bottom: 2.75rem;
}

.page-faq .faq-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem 0.875rem;
  margin-bottom: 1.25rem;
  padding-top: 0.5rem;
}

.page-faq .faq-section__index {
  font-family: var(--font-title);
  font-size: 2.375rem;
  font-weight: 800;
  line-height: 1;
  color: rgba(27, 78, 158, 0.16);
  user-select: none;
}

.page-faq .faq-section__tag {
  display: inline-flex;
  align-items: center;
  height: 1.625rem;
  padding: 0 0.75rem;
  border-radius: 999px;
  background: var(--tag-color, var(--c-primary));
  color: var(--tag-color-text, #ffffff);
  font-family: var(--font-title);
  font-size: 0.71875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-faq .faq-section__title {
  font-family: var(--font-title);
  font-size: var(--h2);
  font-weight: 800;
  line-height: 1.25;
  color: var(--c-text);
  margin: 0;
}

.page-faq .faq-section__desc {
  flex-basis: 100%;
  margin: 0.125rem 0 0 3.25rem;
  color: var(--c-muted);
  font-size: 0.875rem;
  line-height: 1.6;
}

/* 手风琴列表 */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-faq .faq-item {
  background: var(--c-surface);
  border: 1px solid rgba(27, 78, 158, 0.10);
  border-radius: 1.25rem;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-item[open] {
  border-color: rgba(27, 78, 158, 0.32);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  padding: 1rem 1.125rem;
  list-style: none;
}

.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: -2px;
  border-radius: 1.25rem;
}

.page-faq .faq-item__q {
  flex: 0 0 auto;
  width: 1.875rem;
  height: 1.875rem;
  display: grid;
  place-items: center;
  border-radius: 0.625rem;
  background: var(--c-primary);
  color: #ffffff;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 0.75rem;
  box-shadow: 0 4px 10px rgba(27, 78, 158, 0.22);
}

.page-faq .faq-item__text {
  flex: 1;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.45;
  color: var(--c-text);
}

.page-faq .faq-item__toggle {
  position: relative;
  flex: 0 0 auto;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: var(--c-snow);
}

.page-faq .faq-item__toggle::before,
.page-faq .faq-item__toggle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0.6875rem;
  height: 0.125rem;
  border-radius: 0.125rem;
  background: var(--c-primary);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__toggle::after {
  transition: opacity 0.15s ease, transform 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__toggle::after {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.2);
}

.page-faq .faq-item__answer {
  padding: 0.125rem 1.125rem 1.125rem 3.75rem;
  color: var(--c-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
  animation: page-faq-appear 0.25s ease;
}

.page-faq .faq-item__answer p + p {
  margin-top: 0.5rem;
}

/* 图片说明区 */
.page-faq .faq-visual {
  margin: 0.25rem 1.125rem 0.5rem 3.75rem;
  border-radius: 1rem;
  overflow: hidden;
  background: var(--c-highlight);
  border: 1px solid rgba(27, 78, 158, 0.12);
}

.page-faq .faq-visual img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-faq .faq-visual figcaption {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  font-family: var(--font-title);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-primary);
  background: rgba(255, 255, 255, 0.72);
}

.page-faq .faq-visual figcaption::before {
  content: '';
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--c-accent);
  flex: 0 0 auto;
}

/* 仍有疑问 */
.page-faq .faq-help {
  margin-top: 1rem;
}

.page-faq .faq-help__inner {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--c-primary-dark), var(--c-primary));
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: grid;
  gap: 1rem;
  color: var(--c-snow);
}

.page-faq .faq-help__inner::after {
  content: '';
  position: absolute;
  right: -3rem;
  bottom: -4rem;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  background: rgba(245, 179, 1, 0.2);
  pointer-events: none;
}

.page-faq .faq-help__title {
  font-family: var(--font-title);
  font-size: var(--h2);
  font-weight: 800;
  color: #ffffff;
  margin: 0;
  position: relative;
  z-index: 1;
}

.page-faq .faq-help__text {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(248, 249, 252, 0.88);
}

.page-faq .faq-help__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .faq-help .btn--ghost {
  color: var(--c-snow);
  border-color: rgba(248, 249, 252, 0.45);
  background: transparent;
}

.page-faq .faq-help .btn--ghost:hover {
  border-color: var(--c-snow);
  color: var(--c-snow);
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__answer {
    animation: none;
  }
}

@keyframes page-faq-appear {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 桌面端 */
@media (min-width: 64em) {
  .page-faq .faq-hero {
    padding: 2rem 0 3rem;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1fr) 18rem;
    gap: 2.5rem;
    align-items: end;
    margin-top: 2rem;
  }

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

  .page-faq .faq-layout__inner {
    display: grid;
    grid-template-columns: minmax(0, var(--faq-index-w)) minmax(0, 1fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 2rem;
  }

  .page-faq .faq-index__card {
    padding: 1.5rem 1.25rem;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0.375rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    border-radius: 0.875rem;
    white-space: normal;
    border-color: transparent;
    background: transparent;
    padding: 0.625rem 0.75rem;
  }

  .page-faq .faq-index__link:hover {
    background: var(--c-highlight);
    border-color: transparent;
  }

  .page-faq .faq-section {
    margin-bottom: 3rem;
  }

  .page-faq .faq-section__desc {
    padding-left: 3.5rem;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    align-items: center;
    padding: 2.5rem 3rem;
  }

  .page-faq .faq-help__text {
    max-width: 22rem;
  }
}