.page-faq {
  --faq-side: 244px;
  --faq-gap: clamp(24px, 4vw, 56px);
  --faq-anchor: 108px;
  background: var(--mdb-surface);
  color: var(--mdb-ink);
}

/* ============ 首屏 ============ */
.page-faq .mdb-section--wide.faq-intro {
  position: relative;
  overflow: hidden;
  background: var(--mdb-qing);
  color: var(--mdb-paper);
  padding-block: clamp(22px, 3.5vw, 34px) clamp(46px, 7vw, 92px);
}

.page-faq .faq-intro__crumbs .mdb-crumbs__list {
  color: rgba(244, 241, 234, .72);
}

.page-faq .faq-intro__crumbs .mdb-crumbs__link {
  color: rgba(244, 241, 234, .92);
  text-decoration: none;
}

.page-faq .faq-intro__crumbs .mdb-crumbs__link:hover,
.page-faq .faq-intro__crumbs .mdb-crumbs__link:focus-visible {
  color: var(--mdb-lime);
}

.page-faq .faq-intro__crumbs .mdb-crumbs__current {
  color: var(--mdb-lime);
  font-weight: 700;
}

.page-faq .faq-intro__eyebrow {
  margin-top: clamp(26px, 4vw, 44px);
  color: var(--mdb-lime);
  letter-spacing: .14em;
}

.page-faq .faq-intro__title {
  margin: 14px 0 0;
  font-size: clamp(38px, 7.6vw, 84px);
  line-height: 1.03;
  font-weight: 900;
  letter-spacing: -.012em;
  color: var(--mdb-paper);
  max-width: 16ch;
}

.page-faq .faq-intro__foot {
  margin-top: clamp(24px, 4vw, 44px);
  display: grid;
  gap: 16px;
}

@media (min-width: 860px) {
  .page-faq .faq-intro__foot {
    grid-template-columns: minmax(0, 1fr) 240px;
    align-items: end;
    gap: 48px;
  }
}

.page-faq .faq-intro__lead {
  margin: 0;
  max-width: 42em;
  color: rgba(244, 241, 234, .88);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-intro__hint {
  margin: 0;
  font-family: var(--mdb-font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mdb-lime-soft);
  border-left: 2px solid var(--mdb-orange);
  padding-left: 12px;
  line-height: 1.6;
}

.page-faq .faq-intro__line {
  margin-top: clamp(30px, 5vw, 58px);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--mdb-lime) 22%, var(--mdb-lime) 62%, transparent);
  opacity: .6;
}

/* ============ 文档区 ============ */
.page-faq .faq-doc {
  padding-block: clamp(44px, 6.5vw, 96px) clamp(56px, 8vw, 112px);
  background: var(--mdb-surface);
}

.page-faq .faq-doc__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
}

@media (min-width: 900px) {
  .page-faq .faq-doc__grid {
    grid-template-columns: var(--faq-side) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---- 左侧主题索引 ---- */
.page-faq .faq-toc {
  border-top: 2px solid var(--mdb-ink);
  padding-top: 16px;
}

@media (min-width: 900px) {
  .page-faq .faq-toc__inner {
    position: sticky;
    top: var(--faq-anchor);
  }
}

.page-faq .faq-toc__title {
  margin: 0 0 14px;
  font-family: var(--mdb-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mdb-gray);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc__link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px 10px 10px;
  color: var(--mdb-ink);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background-color 160ms ease-out, border-color 160ms ease-out;
}

.page-faq .faq-toc__link:hover {
  background: var(--mdb-lime-soft);
  border-left-color: var(--mdb-orange);
}

.page-faq .faq-toc__link:focus-visible {
  outline: 2px solid var(--mdb-orange);
  outline-offset: 2px;
  background: var(--mdb-lime-soft);
}

.page-faq .faq-toc__num {
  flex: none;
  font-family: var(--mdb-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--mdb-orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-toc__label {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
}

/* ---- 作答区 ---- */
.page-faq .faq-doc__body {
  min-width: 0;
  max-width: 46em;
}

.page-faq .faq-topic {
  scroll-margin-top: var(--faq-anchor);
}

.page-faq .faq-topic + .faq-topic {
  margin-top: clamp(38px, 5.5vw, 68px);
  padding-top: clamp(34px, 5vw, 60px);
  border-top: 1px solid var(--mdb-line-soft);
}

.page-faq .faq-topic__head {
  display: flex;
  gap: 14px;
  align-items: baseline;
}

.page-faq .faq-topic__num {
  flex: none;
  font-family: var(--mdb-font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--mdb-orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-topic__title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.005em;
  color: var(--mdb-ink);
}

.page-faq .faq-topic__sub {
  margin: 10px 0 0 30px;
  max-width: 34em;
  color: var(--mdb-gray);
  font-size: 15px;
  line-height: 1.7;
}

/* ---- 问答条目 ---- */
.page-faq .faq-q {
  border-bottom: 1px solid var(--mdb-line);
}

.page-faq .faq-q:first-of-type {
  margin-top: 22px;
  border-top: 1px solid var(--mdb-line);
}

.page-faq .faq-q__head {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-q__head:hover .faq-q__title,
.page-faq .faq-q__head:focus-visible .faq-q__title {
  color: var(--mdb-qing-deep);
}

.page-faq .faq-q__head:focus-visible {
  outline: 2px solid var(--mdb-orange);
  outline-offset: -2px;
}

.page-faq .faq-q__num {
  flex: none;
  padding-top: 5px;
  font-family: var(--mdb-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--mdb-qing-soft);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-q__title {
  flex: 1;
  min-width: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--mdb-ink);
  transition: color 160ms ease-out;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border: 1px solid var(--mdb-line);
  border-radius: 50%;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--mdb-ink);
  transition: transform 160ms ease-out, opacity 160ms ease-out;
}

.page-faq .faq-q__mark::before {
  left: 4px;
  right: 4px;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.page-faq .faq-q__mark::after {
  top: 4px;
  bottom: 4px;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.page-faq .faq-q[open] .faq-q__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-q[open] .faq-q__mark {
  border-color: var(--mdb-orange);
}

.page-faq .faq-q[open] .faq-q__mark::before {
  background: var(--mdb-orange);
}

.page-faq .faq-q__body {
  padding: 0 4px 22px 32px;
  max-width: 40em;
  color: var(--mdb-gray);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-q__body a {
  color: var(--mdb-qing-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-q__body a:hover,
.page-faq .faq-q__body a:focus-visible {
  color: var(--mdb-orange);
}

/* ---- 配图 ---- */
.page-faq .faq-fig {
  margin: clamp(24px, 3.4vw, 34px) 0 4px;
}

.page-faq .faq-fig--entry {
  max-width: 520px;
}

.page-faq .faq-fig--match {
  max-width: 700px;
}

.page-faq .faq-fig .mdb-figure__img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ---- 联系收尾 ---- */
.page-faq .faq-contact {
  margin-top: 22px;
  max-width: 40em;
}

.page-faq .faq-contact p {
  margin: 0;
  color: var(--mdb-gray);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-contact__rows {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--mdb-line);
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 4px 18px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--mdb-line);
}

@media (min-width: 620px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
  }
}

.page-faq .faq-contact__k {
  font-family: var(--mdb-font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mdb-gray);
}

.page-faq .faq-contact__v {
  font-family: var(--mdb-font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--mdb-ink);
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.page-faq .faq-contact__n {
  font-size: 13px;
  line-height: 1.65;
  color: var(--mdb-gray);
}

@media (min-width: 620px) {
  .page-faq .faq-contact__n {
    grid-column: 2;
  }
}

.page-faq .faq-contact__tail {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--mdb-lime);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mdb-ink);
}

.page-faq .faq-contact__tail a {
  color: var(--mdb-qing-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-contact__tail a:hover,
.page-faq .faq-contact__tail a:focus-visible {
  color: var(--mdb-orange);
}

/* ---- 焦点态 ---- */
.page-faq :target .faq-topic__title {
  color: var(--mdb-qing-deep);
}

/* ---- 窄屏收口 ---- */
@media (max-width: 599px) {
  .page-faq .faq-toc__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-topic__sub {
    margin-left: 0;
  }

  .page-faq .faq-q__body {
    padding-left: 0;
    padding-top: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toc__link,
  .page-faq .faq-q__title,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after {
    transition: none;
  }
}
<<<END>>>