.page-faq {
  --faq-gap: clamp(20px, 3vw, 32px);
  --faq-section-gap: clamp(72px, 10vw, 128px);
  overflow-x: clip;
  padding-bottom: clamp(56px, 8vw, 112px);
}

.page-faq .breadcrumb {
  margin-top: clamp(20px, 3vw, 34px);
  margin-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(26px, 4vw, 52px);
  padding-bottom: clamp(52px, 7vw, 96px);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-size: clamp(34px, 5.6vw, 62px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.08;
  color: var(--text);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--sand);
}

.page-faq .faq-jump {
  margin-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-jump__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-jump__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--text);
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-jump__link:hover,
.page-faq .faq-jump__link:focus-visible {
  border-color: var(--copper);
  background: var(--snow-mid);
}

.page-faq .faq-jump__idx {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--copper);
}

.page-faq .faq-jump__label {
  flex: 1 1 auto;
}

.page-faq .faq-jump__count {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sand);
}

.page-faq .faq-hero__visual {
  margin: 0;
  border-radius: var(--r-lg);
}

/* ---------- 索引层 ---------- */
.page-faq .faq-index {
  padding-bottom: var(--faq-section-gap);
}

.page-faq .faq-index__grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-index__card {
  position: relative;
  padding: 30px 26px 26px;
  border-radius: var(--r-lg);
  background: var(--snow-mid);
  border-left: 3px solid var(--copper);
}

.page-faq .faq-index__mark {
  display: block;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--copper-deep);
}

.page-faq .faq-index__name {
  margin: 10px 0 0;
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-index__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--sand);
}

.page-faq .faq-index__more {
  display: inline-block;
  margin-top: 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--copper-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-index__more:hover {
  color: var(--copper);
}

/* ---------- 问答组通用 ---------- */
.page-faq .faq-group {
  padding-bottom: var(--faq-section-gap);
  scroll-margin-top: 96px;
}

.page-faq .faq-group__layout {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-list {
  display: grid;
  gap: 12px;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-list--wide {
  max-width: 62em;
}

.page-faq .fold {
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: var(--r-md);
  background: var(--snow-mid);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .fold[data-open] {
  border-left-color: var(--pulse);
  background: var(--snow);
}

.page-faq .fold-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 22px;
  border: 0;
  background: none;
  font-family: inherit;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  color: var(--text);
  cursor: pointer;
}

.page-faq .fold-head__q {
  display: flex;
  gap: 12px;
}

.page-faq .faq-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--copper);
  padding-top: 3px;
}

.page-faq .fold-head__arrow {
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.3;
  color: var(--copper);
  transition: transform var(--dur) var(--ease);
}

.page-faq .fold[data-open] .fold-head__arrow {
  transform: rotate(90deg);
}

.page-faq .fold-panel__inner {
  padding: 0 22px 22px;
}

.page-faq .fold-panel__inner p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

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

/* ---------- 字段关系示意 ---------- */
.page-faq .faq-map {
  margin: 0;
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--r-lg);
  background: var(--ink);
}

.page-faq .faq-map svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-map__box {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.page-faq .faq-map__box--root {
  stroke: var(--pulse);
  stroke-width: 2;
}

.page-faq .faq-map__box--field {
  stroke: var(--copper);
}

.page-faq .faq-map__line {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.page-faq .faq-map__text {
  font-family: var(--font-sans);
  font-size: 14px;
  fill: var(--snow);
}

.page-faq .faq-map__text--mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  fill: var(--pulse);
}

.page-faq .faq-map__text--field {
  fill: var(--snow-mid);
}

.page-faq .faq-map__caption {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--line);
}

.page-faq .faq-map__legend {
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--ink-soft);
}

.page-faq .faq-map__legend .legend__item {
  color: var(--snow-mid);
}

/* ---------- 纠错组配图 ---------- */
.page-faq .faq-photo {
  margin: clamp(28px, 4vw, 48px) 0 0;
  border-radius: var(--r-lg);
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  scroll-margin-top: 96px;
}

.page-faq .faq-next__panel {
  padding: clamp(32px, 5vw, 60px);
  border-radius: var(--r-lg);
  background: var(--ink);
  color: var(--snow);
  overflow: hidden;
}

.page-faq .faq-next__number {
  color: var(--pulse);
}

.page-faq .faq-next__title {
  margin: 14px 0 0;
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-next__text {
  margin: 18px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--snow-mid);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-faq .faq-next__links {
  list-style: none;
  margin: 30px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--ink-soft);
  display: grid;
  gap: 12px;
}

.page-faq .faq-next__link {
  font-size: 15px;
  line-height: 1.7;
  color: var(--snow-mid);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-next__link:hover {
  color: var(--pulse);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-faq .faq-hero__text {
    padding-top: 8px;
  }

  .page-faq .faq-group__layout {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-faq .faq-map {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-hero__title {
    max-width: 12em;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-jump__link {
    flex-wrap: wrap;
    border-radius: var(--r-md);
  }

  .page-faq .fold-head {
    padding: 16px 16px;
    font-size: 16px;
  }

  .page-faq .fold-panel__inner {
    padding: 0 16px 18px;
  }

  .page-faq .faq-map {
    padding: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .fold-head__arrow,
  .page-faq .fold,
  .page-faq .faq-jump__link {
    transition: none;
  }

  .page-faq .fold[data-open] .fold-head__arrow {
    transform: rotate(90deg);
  }
}
<<<END>>>