.page-faq {
  --faq-rail-w: 286px;
  --faq-gap: clamp(24px, 4vw, 52px);
  background: var(--ink-900);
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.14;
  letter-spacing: .02em;
  font-weight: 700;
  color: var(--mist);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-hero__chip {
  font-size: 12px;
  letter-spacing: .04em;
  padding: 6px 14px;
  color: var(--cyan);
  border: 1px solid var(--cyan-line);
  background: var(--cyan-soft);
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(20, 224, 208, .12), rgba(122, 92, 255, .16));
  aspect-ratio: 3 / 2;
}

.page-faq .faq-hero__figure img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  filter: saturate(.62) contrast(1.06);
}

.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(20, 224, 208, .07) 0 1px, transparent 1px 5px);
}

.page-faq .faq-hero__caption {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 5px 12px;
  border-radius: var(--pill);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
  background: rgba(7, 11, 18, .78);
  border: 1px solid var(--cyan-line);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
}

/* ---------- 高频三问 ---------- */
.page-faq .faq-quick {
  padding: clamp(34px, 5vw, 64px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-quick__head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-quick__head .section-lede {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--faint);
}

.page-faq .faq-quick__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 760px) {
  .page-faq .faq-quick__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .quick-card {
  position: relative;
  padding: 26px 22px 26px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-soft);
  background: linear-gradient(165deg, var(--ink-800), var(--ink-700));
  overflow: hidden;
}

.page-faq .quick-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-faq .quick-card__num {
  display: block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--acid);
  opacity: .85;
}

.page-faq .quick-card h3 {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.45;
  letter-spacing: .02em;
  color: var(--mist);
}

.page-faq .quick-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  padding: clamp(32px, 5vw, 64px) 0 clamp(40px, 6vw, 80px);
  align-items: start;
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
  .page-faq .faq-rail__sticky {
    position: sticky;
    top: 96px;
  }
}

.page-faq .faq-rail__sticky {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-faq .faq-rail__label {
  margin: 0;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faint);
}

.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-filter {
  cursor: pointer;
  padding: 7px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .faq-filter:hover {
  color: var(--mist);
  border-color: var(--cyan-line);
}

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

.page-faq .faq-filter[aria-pressed="true"] {
  color: #06110f;
  background: var(--acid);
  border-color: var(--acid);
  box-shadow: 0 0 0 3px rgba(184, 255, 61, .16);
}

.page-faq .faq-rail__index {
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line-soft);
  margin-top: 4px;
}

.page-faq .faq-index__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 16px;
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .25s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--mist);
}

.page-faq .faq-index__link:hover::before {
  transform: scaleY(1);
}

.page-faq .faq-index__num {
  font-size: 11px;
  color: var(--cyan);
  opacity: .75;
}

.page-faq .faq-rail__note {
  padding: 18px;
  border-radius: var(--r-md);
  border: 1px dashed var(--line);
  background: rgba(12, 22, 32, .72);
}

.page-faq .faq-rail__stamp {
  font-size: 11px;
  letter-spacing: .06em;
  padding: 4px 11px;
  color: var(--acid);
  border: 1px solid rgba(184, 255, 61, .34);
  background: rgba(184, 255, 61, .08);
}

.page-faq .faq-rail__note p {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--faint);
}

.page-faq .faq-rail__more {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
  padding-bottom: 2px;
}

.page-faq .faq-rail__more:hover {
  color: var(--mist);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-panel {
  min-width: 0;
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(34px, 5vw, 60px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .qa-group__head {
  margin-bottom: 18px;
}

.page-faq .qa-group__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: .03em;
  color: var(--mist);
}

.page-faq .qa-group__lede {
  margin: 0;
  font-size: 14px;
  color: var(--faint);
}

.page-faq .qa-group__split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

@media (min-width: 1040px) {
  .page-faq .qa-group__split {
    grid-template-columns: minmax(0, 1fr) 232px;
    align-items: start;
  }
}

.page-faq .faq-legacy__figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-legacy__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(.5) contrast(1.05);
}

.page-faq .faq-legacy__figure .media-frame__caption {
  display: block;
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--faint);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  margin-bottom: 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(16, 30, 43, .92), rgba(12, 22, 32, .78));
  overflow: hidden;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--cyan-line);
  background: linear-gradient(180deg, rgba(20, 224, 208, .07), rgba(12, 22, 32, .92));
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 17px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--mist);
  transition: color .2s var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--cyan);
}

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

.page-faq .qa__num {
  flex: none;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
  opacity: .78;
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin-top: 4px;
  border: 1px solid var(--cyan-line);
  border-radius: 50%;
  transition: background .25s var(--ease), border-color .25s var(--ease);
}

.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .qa__icon::before {
  width: 8px;
  height: 1px;
}

.page-faq .qa__icon::after {
  width: 1px;
  height: 8px;
  transition: opacity .25s var(--ease);
}

.page-faq .qa[open] .qa__icon::after {
  opacity: 0;
}

.page-faq .qa[open] .qa__icon {
  background: var(--cyan-soft);
  border-color: var(--cyan);
}

.page-faq .qa__a {
  position: relative;
  padding: 0 16px 20px 40px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .qa__a::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 2px;
  bottom: 18px;
  width: 1px;
  background: var(--line-soft);
}

.page-faq .qa__a p {
  margin: 0;
}

.page-faq .qa__a p + p {
  margin-top: 8px;
}

/* ---------- 人工协助 ---------- */
.page-faq .qa-group--help {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 840px) {
  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

.page-faq .faq-help__block {
  padding: 22px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: linear-gradient(160deg, var(--ink-800), rgba(7, 11, 18, .9));
}

.page-faq .faq-help__block h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: .03em;
  color: var(--mist);
}

.page-faq .faq-help__block p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-help__block .btn {
  font-size: 13px;
  padding: 9px 20px;
}

.page-faq .faq-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-contact .contact-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-soft);
  background: rgba(7, 11, 18, .6);
}

.page-faq .faq-contact .contact-row__label {
  display: block;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--faint);
}

.page-faq .faq-contact .contact-row__text {
  display: block;
  margin-top: 3px;
  font-size: 13.5px;
  color: var(--mist);
  word-break: break-all;
}

.page-faq .faq-contact .copy-btn {
  flex: none;
  cursor: pointer;
  padding: 6px 13px;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--cyan-line);
  border-radius: var(--pill);
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-contact .copy-btn:hover {
  background: var(--cyan-soft);
}

.page-faq .faq-contact .copy-btn[data-copied] {
  color: #06110f;
  background: var(--acid);
  border-color: var(--acid);
}

.page-faq .faq-help__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--faint);
}

.page-faq .faq-help__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-help__links .btn {
  font-size: 13px;
  padding: 9px 20px;
}

.page-faq .faq-top {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 12.5px;
  color: var(--faint);
  text-decoration: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--pill);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-top:hover {
  color: var(--cyan);
  border-color: var(--cyan-line);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 560px) {
  .page-faq .qa__q {
    padding: 15px 13px;
    font-size: 15px;
    gap: 9px;
  }
  .page-faq .qa__a {
    padding: 0 13px 18px 33px;
    font-size: 14px;
  }
  .page-faq .qa__a::before {
    left: 19px;
  }
  .page-faq .quick-card {
    padding: 22px 18px;
  }
  .page-faq .faq-help__links .faq-top {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .faq-filter,
  .page-faq .qa__icon,
  .page-faq .faq-index__link::before {
    transition: none;
  }
}
<<<END>>>