.page-faq {
  --faq-rail-w: 256px;
  --faq-rail-gap: 56px;
  --faq-answer-indent: 44px;
  position: relative;
  background:
    radial-gradient(1100px 620px at 90% -6%, rgba(56, 242, 210, .10), transparent 62%),
    radial-gradient(900px 540px at 2% 14%, rgba(30, 77, 143, .30), transparent 66%),
    var(--sky-900);
  color: var(--star);
  padding-bottom: clamp(56px, 9vw, 110px);
}

/* ---------- hero ---------- */
.page-faq .faq-hero {
  border-bottom: 1px solid var(--hair);
  padding: clamp(28px, 5vw, 52px) 0 clamp(30px, 5vw, 56px);
}

.page-faq .faq-hero-inner {
  display: block;
}

.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-kicker {
  margin: 0 0 16px;
  color: var(--cyan);
}

.page-faq .faq-title {
  margin: 0 0 20px;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 6.4vw, 72px);
  line-height: 1.04;
  letter-spacing: .01em;
  color: var(--star);
}

.page-faq .faq-lead {
  margin: 0 0 26px;
  max-width: 760px;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--mist);
}

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

/* ---------- shell ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: clamp(30px, 5vw, 56px);
}

/* ---------- rail ---------- */
.page-faq .faq-rail {
  padding: 16px;
  border: 1px solid var(--hair);
  background: rgba(18, 39, 72, .58);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  color: var(--mist);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

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

.page-faq .faq-rail-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--hair);
  color: var(--mist);
  font-size: var(--fs-14);
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--star);
  border-color: var(--cyan);
  background: rgba(56, 242, 210, .07);
}

.page-faq .faq-rail-num {
  font-family: var(--font-num);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-rail-note {
  margin: 12px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-rail-note a {
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-rail-note a:hover {
  color: var(--cyan);
}

/* ---------- .page-faq & groups ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(38px, 5.5vw, 68px);
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: 88px;
}

.page-faq .faq-group-head {
  padding-bottom: 16px;
}

.page-faq .faq-group-head::before {
  content: "";
  display: block;
  width: 46px;
  height: 2px;
  margin-bottom: 14px;
  background: linear-gradient(90deg, var(--cyan), rgba(56, 242, 210, 0));
}

.page-faq .faq-group-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.15;
  letter-spacing: .02em;
  color: var(--star);
}

.page-faq .faq-group-note {
  margin: 0;
  max-width: 660px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- list ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--hair);
}

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

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 17px 6px;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.page-faq .faq-q:hover {
  background: rgba(56, 242, 210, .04);
}

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

.page-faq .faq-num {
  padding-top: 4px;
  font-family: var(--font-num);
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-qtext {
  min-width: 0;
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.62;
  color: var(--star);
}

.page-faq .faq-caret {
  width: 0;
  height: 0;
  margin-top: 8px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--mist);
  transition: transform var(--dur) var(--ease), border-top-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-q {
  background: rgba(56, 242, 210, .035);
}

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

.page-faq .faq-item[open] .faq-caret {
  transform: rotate(180deg);
  border-top-color: var(--cyan);
}

.page-faq .faq-a {
  padding: 2px 6px 24px var(--faq-answer-indent);
  animation: faq-answer-in var(--dur) var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-a > p {
  margin: 0;
  max-width: 66ch;
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-a a {
  color: var(--sand);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

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

/* ---------- figures ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
  border: 1px solid var(--hair);
  background: var(--sky-800);
  box-shadow: var(--shadow-soft);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--hair);
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- group foot ---------- */
.page-faq .faq-group-foot {
  margin: 18px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-group-foot a {
  color: var(--orange);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-group-foot a:hover {
  color: var(--sand);
}

/* ---------- help group ---------- */
.page-faq .faq-group--help {
  padding: clamp(20px, 3.4vw, 34px);
  border: 1px solid rgba(255, 107, 44, .32);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(255, 107, 44, .09), rgba(18, 39, 72, .62));
}

.page-faq .faq-group--help .faq-group-head::before {
  background: linear-gradient(90deg, var(--orange), rgba(255, 107, 44, 0));
}

.page-faq .faq-group--help .faq-list {
  border-top-color: rgba(255, 255, 255, .16);
}

/* ---------- tablet / desktop ---------- */
@media (min-width: 720px) {
  .page-faq .faq-q {
    padding: 20px 8px;
  }

  .page-faq .faq-qtext {
    font-size: var(--fs-20);
    line-height: 1.5;
  }

  .page-faq .faq-a {
    padding-bottom: 28px;
  }

  .page-faq .faq-figure {
    margin-top: 26px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: var(--faq-rail-gap);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 96px;
    padding: 20px 18px;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .page-faq .faq-rail-list li {
    flex: none;
  }

  .page-faq .faq-rail-link {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    width: 100%;
    padding: 8px 8px 8px 12px;
    border-color: transparent;
    border-left: 2px solid var(--hair);
    white-space: normal;
  }

  .page-faq .faq-rail-link:hover,
  .page-faq .faq-rail-link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(56, 242, 210, .07);
  }

  .page-faq .faq-group {
    scroll-margin-top: 112px;
  }

  .page-faq .faq-figure {
    max-width: 78%;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-a {
    padding-right: 40px;
  }

  .page-faq .faq-figure {
    max-width: 62%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-a {
    animation: none;
  }

  .page-faq .faq-caret,
  .page-faq .faq-num,
  .page-faq .faq-q,
  .page-faq .faq-rail-link {
    transition: none;
  }
}
<<<END>>>