.page-faq {
  --faq-rail-w: 236px;
  --faq-card-line: rgba(185, 194, 204, .42);
  background: var(--c-deep);
  color: var(--c-cream);
  font-family: var(--f-sans);
}

.page-faq .mono {
  font-family: var(--f-mono);
  letter-spacing: .04em;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 22px 0 clamp(36px, 6vw, 68px);
  background:
    radial-gradient(120% 96% at 92% 0%, rgba(43, 227, 194, .16), transparent 60%),
    radial-gradient(80% 70% at 0% 100%, rgba(255, 90, 31, .12), transparent 65%),
    linear-gradient(180deg, var(--c-abyss), var(--c-deep) 72%);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-cyan) 52%, rgba(43, 227, 194, 0) 88%);
  opacity: .8;
}

.page-faq .faq-crumbs {
  margin-bottom: clamp(20px, 4vw, 34px);
  color: var(--c-silver);
  font-size: 13px;
}

.page-faq .faq-crumbs a {
  color: var(--c-silver);
  text-decoration: none;
}

.page-faq .faq-crumbs a:hover,
.page-faq .faq-crumbs a:focus-visible {
  color: var(--c-cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: start;
}

.page-faq .faq-hero__copy h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 7vw, 58px);
  line-height: 1.06;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--c-cream);
}

.page-faq .faq-hero__copy .lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 238, 223, .82);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  padding: 12px;
  border: 1px solid var(--line-hair);
  border-radius: 2px;
  background: rgba(4, 16, 31, .55);
}

.page-faq .faq-jump__label {
  font-size: 11px;
  color: var(--c-silver);
  padding: 0 6px;
  text-transform: uppercase;
}

.page-faq .faq-jump__chip {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  color: var(--c-cream);
  font-size: 14px;
  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__chip:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  background: rgba(255, 90, 31, .08);
}

.page-faq .faq-jump__chip:focus-visible {
  outline: none;
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 3px rgba(43, 227, 194, .35);
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: 10px;
  background: var(--c-cream);
  border: 1px solid var(--c-paper);
  border-radius: 2px;
  box-shadow: 10px 12px 0 -4px rgba(230, 220, 200, .28);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: 1px;
}

.page-faq .faq-hero__cap {
  display: block;
  margin-top: 10px;
  font-size: 11px;
  color: var(--c-ink);
  text-align: right;
  letter-spacing: .06em;
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--line-hair);
}

.page-faq .faq-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: rgba(7, 26, 51, .92);
}

.page-faq .faq-metric__num {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-cyan);
  line-height: 1.1;
}

.page-faq .faq-metric__label {
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-silver);
}

/* 入口卡 */
.page-faq .faq-entry {
  padding-top: clamp(36px, 6vw, 64px);
  padding-bottom: clamp(30px, 5vw, 52px);
}

.page-faq .faq-sec-head {
  max-width: 66ch;
}

.page-faq .faq-sec-head h2 {
  margin: 12px 0 0;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--c-cream);
}

.page-faq .faq-sec-head__note {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(185, 194, 204, .92);
}

.page-faq .faq-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 18px;
  border: 1px solid var(--faq-card-line);
  border-left: 3px solid var(--c-orange);
  border-radius: 2px;
  background: linear-gradient(160deg, rgba(14, 46, 82, .72), rgba(7, 26, 51, .55));
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-cyan);
  border-left-color: var(--c-cyan);
}

.page-faq .faq-card__idx {
  font-size: 12px;
  color: var(--c-orange);
  letter-spacing: .16em;
}

.page-faq .faq-card__title {
  margin: 0;
  font-size: 19px;
  line-height: 1.35;
  color: var(--c-cream);
}

.page-faq .faq-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(185, 194, 204, .95);
}

.page-faq .faq-card__link {
  margin-top: auto;
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  font-size: 13px;
  color: var(--c-cream);
  text-decoration: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-card__link:hover {
  background: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-abyss);
}

.page-faq .faq-card__link:focus-visible {
  outline: none;
  border-color: var(--c-cyan);
  box-shadow: 0 0 0 3px rgba(43, 227, 194, .35);
}

/* 主体：左索引 + 右问答 */
.page-faq .faq-body {
  padding-bottom: clamp(40px, 7vw, 78px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 42px);
  align-items: start;
}

.page-faq .faq-rail {
  border: 1px solid var(--line-hair);
  border-radius: 2px;
  background: rgba(4, 16, 31, .5);
  padding: 16px 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-silver);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list li {
  flex: 0 0 auto;
}

.page-faq .faq-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-left: 2px solid rgba(43, 227, 194, .45);
  background: rgba(14, 46, 82, .55);
  border-radius: 2px;
  font-size: 13px;
  color: var(--c-cream);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease), border-left-color var(--dur) var(--ease);
}

.page-faq .faq-rail__list a .mono {
  font-size: 11px;
  color: var(--c-cyan);
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  background: rgba(255, 90, 31, .14);
  border-left-color: var(--c-orange);
  outline: none;
}

.page-faq .faq-rail__hint {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(185, 194, 204, .85);
}

.page-faq .faq-group {
  padding: clamp(24px, 3vw, 30px);
  border: 1px solid var(--line-hair);
  border-radius: 2px;
  background: rgba(7, 26, 51, .55);
}

.page-faq .faq-group + .faq-group {
  margin-top: 18px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group__num {
  font-size: 13px;
  color: var(--c-orange);
  letter-spacing: .14em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 3.4vw, 27px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--c-cream);
}

.page-faq .faq-group__lead {
  margin: 16px 0 18px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 238, 223, .84);
}

.page-faq .faq-figure {
  margin: 0 0 18px;
  padding: 8px;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  background: rgba(4, 16, 31, .8);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  border-radius: 1px;
}

.page-faq .faq-figure figcaption {
  margin-top: 8px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--c-cyan);
}

/* 手风琴 */
.page-faq .faq-q {
  border: 1px solid var(--line-hair);
  border-radius: 2px;
  background: rgba(4, 16, 31, .55);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-q + .faq-q {
  margin-top: 10px;
}

.page-faq .faq-q[open] {
  border-color: rgba(43, 227, 194, .55);
  background: rgba(14, 46, 82, .5);
}

.page-faq .faq-q summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 42px 16px 16px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

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

.page-faq .faq-q summary::after {
  content: "+";
  position: absolute;
  top: 13px;
  right: 14px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  font-size: 15px;
  line-height: 1;
  color: var(--c-cyan);
}

.page-faq .faq-q[open] summary::after {
  content: "–";
  border-color: var(--c-orange);
  color: var(--c-orange);
}

.page-faq .faq-q summary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(43, 227, 194, .35);
}

.page-faq .faq-q__num {
  flex: 0 0 auto;
  font-size: 11px;
  color: var(--c-orange);
  letter-spacing: .12em;
  padding-top: 4px;
}

.page-faq .faq-q__title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-cream);
}

.page-faq .faq-q__body {
  padding: 0 18px 18px 18px;
  border-top: 1px solid var(--line-hair);
  margin-top: 0;
  padding-top: 14px;
}

.page-faq .faq-q__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(245, 238, 223, .84);
}

.page-faq .faq-q__body p + p {
  margin-top: 10px;
}

.page-faq .faq-q__more {
  margin-top: 12px;
}

.page-faq .faq-q__more a {
  display: inline-block;
  border-bottom: 1px solid var(--c-cyan);
  color: var(--c-cyan);
  font-size: 13px;
  text-decoration: none;
  padding-bottom: 2px;
}

.page-faq .faq-q__more a:hover {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

.page-faq .faq-steps {
  counter-reset: faqstep;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 34px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 238, 223, .9);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--f-mono);
  font-size: 11px;
  line-height: 1.6;
  color: var(--c-abyss);
  background: var(--c-cyan);
  width: 24px;
  text-align: center;
  border-radius: 2px;
}

/* 收尾 */
.page-faq .faq-help {
  padding: clamp(36px, 6vw, 66px) 0;
  background: var(--c-cream);
  color: var(--c-ink);
  border-top: 4px solid var(--c-orange);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 46px);
  align-items: start;
}

.page-faq .faq-help__eyebrow {
  color: var(--c-orange);
}

.page-faq .faq-help h2 {
  margin: 12px 0 0;
  max-width: 24ch;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--c-ink);
}

.page-faq .faq-help__text {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(30, 23, 18, .82);
}

.page-faq .faq-help__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  border-top: 1px solid rgba(30, 23, 18, .18);
  background: rgba(30, 23, 18, .18);
}

.page-faq .faq-help__list li {
  background: var(--c-cream);
}

.page-faq .faq-help__list a {
  display: block;
  padding: 15px 4px;
  font-size: 15px;
  color: var(--c-ink);
  text-decoration: none;
  border-left: 3px solid var(--c-orange);
  padding-left: 14px;
  transition: background-color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-help__list a:hover,
.page-faq .faq-help__list a:focus-visible {
  background: rgba(255, 90, 31, .12);
  padding-left: 20px;
  outline: none;
}

@media (min-width: 720px) {
  .page-faq .faq-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .faq-q__body {
    padding-left: 46px;
    padding-right: 26px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-hero__figure {
    margin-top: 10px;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 3vw, 40px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    padding: 18px 16px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: 4px;
  }

  .page-faq .faq-rail__list a {
    display: flex;
    width: 100%;
    white-space: normal;
    background: transparent;
    border-left: 2px solid rgba(185, 194, 204, .35);
    padding: 10px 12px;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-left-color: var(--c-orange);
    background: rgba(255, 90, 31, .1);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(30px, 5vw, 70px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-jump__chip,
  .page-faq .faq-card__link,
  .page-faq .faq-help__list a {
    transition: none;
  }

  .page-faq .faq-card:hover {
    transform: none;
  }
}
<<<END>>>