.page-faq {
  --faq-rule: 3px;
  background: var(--paper);
  color: var(--ink);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-hero {
  padding-block: clamp(20px, 3vw, 40px) clamp(28px, 4vw, 52px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(36px, 7.2vw, 96px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  max-width: 14em;
}

.page-faq .faq-hero__intro {
  margin: clamp(20px, 3vw, 32px) 0 0;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-hero__media {
  margin: clamp(24px, 4vw, 48px) 0 0;
}

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

/* ---------- 两栏问答版式 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  margin-top: clamp(28px, 4vw, 56px);
}

.page-faq .faq-index {
  border-top: var(--faq-rule) solid var(--ink);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  font-size: var(--fs-14);
  line-height: 1.4;
  transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--rosso);
  letter-spacing: 0.06em;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--rosso);
  background: var(--paper-2);
  color: var(--rosso-deep);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(36px, 5vw, 64px);
  scroll-margin-top: 104px;
}

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

.page-faq .faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border-top: var(--faq-rule) solid var(--rosso);
  padding-top: 14px;
  margin-bottom: 6px;
}

.page-faq .faq-group__num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--fs-28);
  line-height: 0.9;
  color: var(--rosso);
  letter-spacing: -0.02em;
}

.page-faq .faq-group__label {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-group__title {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-figure {
  margin: 20px 0 20px;
}

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

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: var(--hair) solid var(--line);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 4px 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: var(--fs-17);
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
  transition: color 180ms ease;
}

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

.page-faq .faq-item summary::after {
  content: "";
  margin-left: auto;
  flex: none;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--rosso);
  border-bottom: 2px solid var(--rosso);
  transform: rotate(45deg);
  transition: transform 240ms ease;
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(-135deg);
}

.page-faq .faq-item summary:hover {
  color: var(--rosso-deep);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__body {
  padding: 0 0 20px;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 42em;
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-item__body a {
  color: var(--rosso-deep);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover {
  background: var(--paper-2);
}

.page-faq .kw {
  background: var(--lime);
  color: var(--ink);
  padding: 0 0.2em;
  font-family: var(--font-mono);
  font-size: 0.94em;
  font-weight: 700;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(36px, 5vw, 64px);
  background: var(--ink);
  color: var(--paper);
  padding: clamp(24px, 4vw, 44px);
  display: grid;
  gap: 22px;
  align-items: center;
  border-left: 6px solid var(--rosso);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-cta__desc {
  margin: 10px 0 0;
  max-width: 40em;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-cta__btn {
  justify-self: start;
  white-space: nowrap;
}

.page-faq .faq-crosslink {
  margin: clamp(24px, 3vw, 36px) 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--steel);
  max-width: 46em;
}

.page-faq .faq-crosslink a {
  color: var(--rosso-deep);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-underline-offset: 3px;
}

.page-faq .faq-crosslink a:hover {
  text-decoration-color: var(--rosso);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-index__link {
    padding: 10px 10px 10px 14px;
  }

  .page-faq .faq-item summary {
    padding-right: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item summary::after,
  .page-faq .faq-index__link,
  .page-faq .faq-item summary {
    transition-duration: 1ms;
  }
}