.page-faq {
  --faq-rail-w: 292px;
  --faq-accent: var(--cyan);
  display: block;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(26px, 5vw, 52px);
  padding-bottom: clamp(30px, 5vw, 56px);
  background:
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(43, 232, 200, 0.045) 47px 48px),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(115% 85% at 84% 6%, rgba(43, 232, 200, 0.15), transparent 60%),
              radial-gradient(70% 70% at 4% 96%, rgba(255, 122, 47, 0.10), transparent 62%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__eyebrow {
  margin: 20px 0 12px;
  font-family: var(--font-numeric);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(32px, 6.4vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 20ch;
}

.page-faq .faq-hero__body {
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
  margin-top: clamp(20px, 3vw, 32px);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__body {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
  }
}

.page-faq .faq-hero__intro {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 62ch;
}

.page-faq .faq-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

@media (min-width: 640px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-fact__num {
  font-family: var(--font-numeric);
  font-weight: 500;
  font-size: 42px;
  line-height: 0.95;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-faq .faq-fact__label {
  font-size: 13px;
  color: var(--dim);
  letter-spacing: 0.04em;
}

.page-faq .faq-banner {
  margin: clamp(26px, 4vw, 44px) 0 0;
  aspect-ratio: 8 / 3;
  border-radius: 3px;
  border: 1px solid var(--line);
}

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

/* ============ 主体双栏 ============ */
.page-faq .faq-section {
  background: var(--ink-900);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.4vw, 56px);
  align-items: start;
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }
}

/* ---- 左侧目录轨道 ---- */
.page-faq .faq-rail__inner {
  border: 1px solid var(--line);
  background: var(--glass);
  border-radius: 3px;
  padding: 18px 16px 20px;
}

@media (min-width: 1000px) {
  .page-faq .faq-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    backdrop-filter: blur(9px);
  }
}

.page-faq .faq-rail__caption {
  margin: 0 0 14px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.16em;
  color: var(--paper);
  padding-left: 12px;
  border-left: 3px solid var(--cyan);
  line-height: 1.2;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-filter .filter-chip {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(7, 16, 13, 0.6);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1;
  padding: 7px 12px;
  border-radius: 2px;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-filter .filter-chip:hover {
  color: var(--cyan-soft);
  border-color: rgba(43, 232, 200, 0.45);
}

.page-faq .faq-filter .filter-chip[aria-pressed="true"],
.page-faq .faq-filter .filter-chip.is-active {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.page-faq .faq-toc__scroll {
  max-height: 320px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

@media (min-width: 1000px) {
  .page-faq .faq-toc__scroll {
    max-height: calc(100vh - 340px);
  }
}

.page-faq .faq-toc__scroll::-webkit-scrollbar {
  width: 4px;
}

.page-faq .faq-toc__scroll::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 2px;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.page-faq .faq-toc__item.is-hidden {
  display: none;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid transparent;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(43, 232, 200, 0.07);
}

.page-faq .faq-toc__idx {
  flex: none;
  font-family: var(--font-numeric);
  font-size: 15px;
  font-weight: 500;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
  transition: color 0.18s var(--ease);
}

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

.page-faq .faq-toc__item--tail {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-toc__item--tail .faq-toc__idx {
  color: var(--orange);
}

/* ---- 右侧答案区 ---- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-group {
  position: relative;
  padding-top: clamp(20px, 3vw, 30px);
  padding-bottom: clamp(26px, 4vw, 44px);
  border-top: 3px solid var(--line);
  margin-bottom: clamp(34px, 5vw, 60px);
}

.page-faq .faq-group.is-hidden {
  display: none;
}

.page-faq .faq-group--promo {
  border-top-color: var(--cyan);
}

.page-faq .faq-group--half {
  border-top-color: var(--orange);
}

.page-faq .faq-group--round {
  border-top-color: var(--cyan-soft);
}

.page-faq .faq-group--archive {
  border-top-color: var(--muted);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  margin-bottom: clamp(14px, 2.4vw, 24px);
}

.page-faq .faq-group__idx {
  font-family: var(--font-numeric);
  font-weight: 500;
  font-size: clamp(38px, 6vw, 54px);
  line-height: 0.9;
  color: var(--line);
  -webkit-text-stroke: 1px var(--line);
  letter-spacing: -0.02em;
  user-select: none;
}

.page-faq .faq-group--promo .faq-group__idx { color: rgba(43, 232, 200, 0.22); -webkit-text-stroke: 1px var(--cyan); }
.page-faq .faq-group--half .faq-group__idx { color: rgba(255, 122, 47, 0.22); -webkit-text-stroke: 1px var(--orange); }
.page-faq .faq-group--round .faq-group__idx { color: rgba(143, 246, 228, 0.2); -webkit-text-stroke: 1px var(--cyan-soft); }
.page-faq .faq-group--archive .faq-group__idx { color: rgba(147, 169, 162, 0.18); -webkit-text-stroke: 1px var(--muted); }

.page-faq .faq-group__title {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.15;
  color: var(--paper);
  letter-spacing: -0.005em;
}

.page-faq .faq-group__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 66ch;
}

.page-faq .faq-group__desc a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.4);
}

.page-faq .faq-group__desc a:hover {
  color: var(--cyan-soft);
}

/* ---- 问答条目 ---- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-item[open] {
  border-bottom-color: var(--line);
}

.page-faq .faq-item:target {
  background: linear-gradient(90deg, rgba(43, 232, 200, 0.1), rgba(43, 232, 200, 0) 62%);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 13px;
  padding: 17px 12px 17px 12px;
  cursor: pointer;
  list-style: none;
  transition: background 0.18s var(--ease);
}

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

.page-faq .faq-item__q:hover {
  background: rgba(43, 232, 200, 0.05);
}

.page-faq .faq-item__num {
  flex: none;
  width: 30px;
  font-family: var(--font-numeric);
  font-size: 16px;
  font-weight: 500;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--cyan);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-item__mark {
  flex: none;
  position: relative;
  align-self: center;
  width: 13px;
  height: 13px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--muted);
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-item__mark::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__mark::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--cyan);
}

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

.page-faq .faq-item__a {
  padding: 0 14px 22px 55px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 68ch;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 200, 0.4);
}

.page-faq .faq-item__a a:hover {
  color: var(--cyan-soft);
}

.page-faq .faq-num {
  font-family: var(--font-numeric);
  font-weight: 500;
  font-size: 1.5em;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(43, 232, 200, 0.45);
}

.page-faq .faq-group--half .faq-num {
  color: var(--orange-soft);
  border-bottom-color: rgba(255, 179, 122, 0.5);
}

/* ---- 竖向步骤条 ---- */
.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 14px 0 14px;
  padding: 0;
}

.page-faq .faq-steps > li {
  position: relative;
  padding: 0 0 14px 44px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-steps > li::before {
  counter-increment: faqstep;
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1px;
  width: 32px;
  font-family: var(--font-numeric);
  font-size: 15px;
  font-weight: 500;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-steps > li::after {
  content: "";
  position: absolute;
  left: 15px;
  top: 24px;
  bottom: 4px;
  width: 1px;
  background: var(--line);
}

.page-faq .faq-steps > li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps > li:last-child::after {
  display: none;
}

/* ---- 组内配图 ---- */
.page-faq .faq-group__figure {
  margin: clamp(18px, 3vw, 28px) 0 0;
  aspect-ratio: 3 / 2;
  max-height: 220px;
  border-radius: 3px;
  border: 1px solid var(--line-soft);
}

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

/* ---- 未解答区块 ---- */
.page-faq .faq-help {
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: 3px;
  background: var(--glass);
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(24px, 4vw, 34px);
  line-height: 1.15;
  color: var(--paper);
}

.page-faq .faq-help__lead {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 64ch;
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  padding-top: clamp(18px, 2.6vw, 26px);
  border-top: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-faq .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-faq .faq-help__key {
  margin: 0 0 10px;
  font-family: var(--font-numeric);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--dim);
}

.page-faq .faq-help__mail {
  margin: 0 0 12px;
  font-family: var(--font-numeric);
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 500;
  color: var(--cyan);
  word-break: break-all;
  line-height: 1.3;
}

.page-faq .faq-help__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 48ch;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-help__list li {
  position: relative;
  padding: 0 0 12px 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-help__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 2px;
  background: var(--orange);
}

.page-faq .faq-help__cta {
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---- 后续入口 ---- */
.page-faq .faq-next {
  background: var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__list {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__row {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-next__row a {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 16px;
  padding: clamp(16px, 2.4vw, 22px) 8px;
  text-decoration: none;
  transition: background 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.page-faq .faq-next__row a:hover {
  background: rgba(43, 232, 200, 0.06);
  padding-left: 16px;
}

.page-faq .faq-next__idx {
  grid-row: 1 / span 2;
  font-family: var(--font-numeric);
  font-size: 26px;
  font-weight: 500;
  color: var(--dim);
  font-variant-numeric: tabular-nums;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-next__row a:hover .faq-next__idx {
  color: var(--cyan);
}

.page-faq .faq-next__label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-next__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-faq .faq-next__row a {
    grid-template-columns: 58px minmax(0, 240px) minmax(0, 1fr);
    gap: 20px;
  }

  .page-faq .faq-next__idx {
    grid-row: auto;
  }
}

/* ---- 窄屏收尾 ---- */
@media (max-width: 639px) {
  .page-faq .faq-item__a {
    padding-left: 12px;
    padding-right: 8px;
  }

  .page-faq .faq-item__q {
    padding-left: 4px;
    padding-right: 4px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-faq .faq-group__idx {
    font-size: 34px;
  }
}
<<<END>>>