.page-faq {
  --faq-ink-soft: #3E5768;
  --faq-line-soft: rgba(6, 24, 38, .14);
  --faq-sticky: calc(var(--header-h) + var(--track-h) + 24px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 6vw, 72px) 0 clamp(34px, 5vw, 60px);
  background-color: var(--ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(36, 74, 94, .38) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 74, 94, .38) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: .65;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -130px;
  width: min(460px, 74vw);
  height: 420px;
  background: var(--pine);
  clip-path: polygon(38% 0, 100% 0, 100% 72%, 0 100%);
  opacity: .8;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 16px;
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-display);
  font-size: clamp(29px, 6vw, 58px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__chips li {
  position: relative;
  padding: 8px 14px 8px 17px;
  border: 1px solid var(--line);
  background: rgba(16, 44, 68, .72);
  color: var(--paper);
  font-size: 13px;
  line-height: 1.4;
  letter-spacing: .01em;
}

.page-faq .faq-hero__chips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
}

/* ---------- 三步路径示意 ---------- */
.page-faq .faq-stage {
  position: relative;
  padding: clamp(32px, 5vw, 66px) 0;
  background: var(--pine);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-stage__inner {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-faq .faq-stage__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-faq .faq-stage__num {
  padding: 2px 8px;
  border: 1px solid rgba(255, 106, 42, .55);
  color: var(--signal);
  font-size: 12px;
}

.page-faq .faq-stage__title {
  margin: 0 0 14px;
  font-size: clamp(21px, 3.4vw, 33px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-stage__copy p {
  margin: 0 0 20px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-steps {
  display: grid;
  gap: 0;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  position: relative;
  padding: 12px 0 12px 22px;
  border-left: 2px solid rgba(43, 240, 208, .26);
}

.page-faq .faq-steps__item:last-child {
  border-left-color: rgba(43, 240, 208, .5);
}

.page-faq .faq-steps__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 20px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-faq .faq-steps__label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-faq .faq-steps__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-stage__link {
  margin: 0;
}

.page-faq .faq-inline-link {
  color: var(--pine);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 59, 52, .38);
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

.page-faq .faq-stage .faq-inline-link {
  color: var(--cyan);
  border-bottom-color: rgba(43, 240, 208, .45);
}

.page-faq .faq-stage .faq-inline-link:hover,
.page-faq .faq-stage .faq-inline-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--signal);
}

.page-faq .faq-stage__figure {
  margin: 0;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

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

/* ---------- 问答主体 ---------- */
.page-faq .faq-guide {
  padding: clamp(32px, 5vw, 70px) 0 clamp(36px, 5vw, 72px);
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-guide__inner {
  display: grid;
  gap: 26px;
  min-width: 0;
}

.page-faq .faq-index {
  min-width: 0;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--faq-ink-soft);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0 0 10px;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index__link {
  display: block;
  padding: 9px 14px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  background: #fff;
  border: 1px solid var(--faq-line-soft);
  transition: color var(--ease), background-color var(--ease), border-color var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--pine);
  border-color: var(--cyan);
  color: var(--paper);
}

.page-faq .faq-index__hint {
  display: none;
  margin: 0;
}

.page-faq .faq-stream {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + var(--track-h) + 20px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  padding-bottom: 13px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--faq-line-soft);
}

.page-faq .faq-group__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--pine);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item {
  border: 1px solid var(--faq-line-soft);
  background: #fff;
  transition: border-color var(--ease), box-shadow var(--ease);
}

.page-faq .faq-item + .faq-item {
  border-top: 0;
}

.page-faq .faq-item[open] {
  border-color: rgba(43, 240, 208, .85);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 17px 18px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
  transition: background-color var(--ease), color var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "";
  width: 11px;
  height: 11px;
  margin-top: -4px;
  border-right: 2px solid var(--pine);
  border-bottom: 2px solid var(--pine);
  transform: rotate(45deg);
  transition: transform var(--ease), border-color var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(-135deg);
  margin-top: 4px;
  border-color: var(--signal);
}

.page-faq .faq-item__q:hover {
  background: rgba(11, 59, 52, .05);
  color: var(--pine);
}

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

.page-faq .faq-item__a {
  padding: 0 18px 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-ink-soft);
  word-break: break-word;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-item__a ul {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-item__a li {
  position: relative;
  padding-left: 15px;
  margin-bottom: 7px;
}

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

.page-faq .faq-item__a li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 5px;
  height: 5px;
  background: var(--signal);
  transform: rotate(45deg);
}

.page-faq .faq-figure {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: center;
  margin: 0 0 20px;
  padding: 12px;
  background: var(--pine);
  border-left: 3px solid var(--cyan);
}

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

.page-faq .faq-figure figcaption {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 底部联系 ---------- */
.page-faq .faq-contact {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 5vw, 66px) 0;
  background: var(--void);
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(36, 74, 94, .42) 1px, transparent 1px);
  background-size: 120px 100%;
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-contact__inner {
  position: relative;
  display: grid;
  gap: 26px;
}

.page-faq .faq-contact__title {
  margin: 0 0 10px;
  font-size: clamp(22px, 3vw, 31px);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-contact__copy {
  margin: 0 0 20px;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-contact__item {
  display: grid;
  gap: 3px;
  padding: 12px 14px;
  background: var(--panel);
  border-left: 3px solid var(--signal);
}

.page-faq .faq-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-faq .faq-contact__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__value--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-figure {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 18px;
  }

  .page-faq .faq-item__q {
    padding: 18px 22px;
    font-size: 16px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-stage__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 56px;
    align-items: center;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-guide__inner {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-left: 2px solid var(--faq-line-soft);
  }

  .page-faq .faq-index__link {
    margin-left: -2px;
    padding: 11px 12px 11px 15px;
    background: none;
    border: 0;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: rgba(11, 59, 52, .07);
    color: var(--pine);
    border-left-color: var(--signal);
  }

  .page-faq .faq-index__hint {
    display: block;
    margin-top: 16px;
    font-size: 13px;
    line-height: 1.75;
    color: var(--faq-ink-soft);
  }
}

@media (min-width: 880px) {
  .page-faq .faq-contact__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
    gap: 48px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .faq-index__link,
  .page-faq .faq-inline-link {
    transition: none;
  }
}
<<<END>>>