.page-faq {
  --faq-accent: var(--signal);
  --faq-pad: 20px;
}

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 14px 0 30px;
  background:
    radial-gradient(120% 88% at 90% -6%, rgba(59, 240, 140, .14), transparent 58%),
    radial-gradient(86% 72% at -4% 6%, rgba(255, 138, 60, .12), transparent 62%);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-hero__copy h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 8vw, 50px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--metal);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--paper);
  text-decoration: none;
  background: rgba(14, 26, 51, .55);
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
  background: rgba(59, 240, 140, .1);
}

.page-faq .faq-hero__fig {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: linear-gradient(158deg, rgba(30, 52, 99, .74), rgba(8, 16, 31, .92));
}

.page-faq .faq-hero__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-body {
  padding-top: 6px;
  padding-bottom: 56px;
}

.page-faq .faq-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
  transition: border-color .24s var(--ease);
}

.page-faq .faq-group--pre { --accent: var(--signal); }
.page-faq .faq-group--live { --accent: var(--amber); }
.page-faq .faq-group--post { --accent: var(--metal); }
.page-faq .faq-group--device { --accent: var(--amber-soft); }
.page-faq .faq-group--a11y { --accent: var(--paper); }
.page-faq .faq-group--help { --accent: var(--signal); }

.page-faq .faq-group__label {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__label h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-faq .faq-group:target {
  border-top-color: var(--accent);
}

.page-faq .faq-group:target .faq-group__label h2 {
  color: var(--accent);
}

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

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

.page-faq .qa summary {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin: 0 -6px;
  padding: 15px 8px 15px 6px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  border-radius: var(--r);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.4;
  color: var(--accent);
}

.page-faq .qa[open] summary::after {
  content: "−";
}

.page-faq .qa summary:hover {
  background-color: rgba(147, 161, 184, .08);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .qa__a {
  margin: 0 0 0 6px;
  padding: 0 0 16px;
  max-width: 64ch;
  border-left: 2px solid transparent;
  font-size: 15px;
  line-height: 1.75;
  color: var(--metal);
  transition: border-color .24s var(--ease), padding-left .24s var(--ease), transform .28s var(--ease);
}

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

.page-faq .qa[open] .qa__a {
  border-left-color: var(--accent);
  padding-left: 16px;
  transform: translateX(4px);
}

.page-faq .faq-mid-fig {
  margin: 0 0 18px;
  max-width: 420px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(30, 52, 99, .6), rgba(8, 16, 31, .9));
}

.page-faq .faq-mid-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-faq .faq-help__lead {
  margin: 0 0 18px;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--metal);
}

.page-faq .faq-help__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-help__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: linear-gradient(150deg, rgba(30, 52, 99, .58), rgba(14, 26, 51, .88));
  text-decoration: none;
  transition: border-color .2s var(--ease), transform .2s var(--ease), background-color .2s var(--ease);
}

.page-faq .faq-help__card:hover,
.page-faq .faq-help__card:focus-visible {
  border-color: var(--signal);
  transform: translateY(-3px);
}

.page-faq .faq-help__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--signal);
}

.page-faq .faq-help__t {
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-help__go {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--metal);
}

.page-faq .faq-help__more {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--metal);
}

.page-faq .faq-help__more a {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 194, 138, .4);
}

.page-faq .faq-help__more a:hover,
.page-faq .faq-help__more a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

@media (min-width: 720px) {
  .page-faq .faq-help__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 22px 0 44px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: end;
  }

  .page-faq .faq-hero__lead {
    font-size: 17px;
  }

  .page-faq .faq-group {
    grid-template-columns: 164px minmax(0, 1fr);
    gap: 50px;
    padding: 44px 0;
  }

  .page-faq .faq-group__label {
    position: sticky;
    top: 24px;
    align-self: start;
    display: block;
  }

  .page-faq .faq-group__num {
    display: block;
    margin-bottom: 18px;
    font-size: 14px;
  }

  .page-faq .faq-group__label h2 {
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-size: 38px;
    line-height: 1;
    letter-spacing: .16em;
    color: var(--accent);
  }

  .page-faq .faq-group:target .faq-group__label h2 {
    text-shadow: 0 0 22px rgba(243, 247, 252, .35);
  }

  .page-faq .qa summary {
    font-size: 17px;
    padding: 17px 10px 17px 6px;
  }

  .page-faq .qa__a {
    font-size: 15.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a,
  .page-faq .qa summary,
  .page-faq .faq-help__card,
  .page-faq .faq-jump a {
    transition: none;
  }

  .page-faq .qa[open] .qa__a {
    transform: none;
  }

  .page-faq .faq-help__card:hover,
  .page-faq .faq-help__card:focus-visible {
    transform: none;
  }
}
<<<END>>>