.page-faq {
  --faq-tone: var(--cyan);
  background: var(--abyss);
  color: var(--white);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(84px, 13vw, 150px) 0 clamp(32px, 5vw, 56px);
  background:
    radial-gradient(120% 90% at 82% -10%, rgba(53, 230, 218, .16), transparent 62%),
    linear-gradient(180deg, #04121d 0%, var(--abyss) 70%);
}

.page-faq .faq-crumbs {
  margin-bottom: clamp(20px, 3vw, 36px);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}

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

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(20px, 3vw, 44px);
}

.page-faq .faq-hero__lead .label {
  display: block;
  margin-bottom: 14px;
  color: var(--cyan-deep);
  letter-spacing: .2em;
}

.page-faq .faq-hero__lead h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.3rem, 7vw, 4.4rem);
  line-height: .98;
  letter-spacing: -.01em;
  max-width: 16ch;
}

.page-faq .faq-hero__lead h1 em {
  font-style: normal;
  color: var(--cyan);
  display: block;
}

.page-faq .faq-hero__note {
  border-left: 2px solid var(--steel);
  padding-left: clamp(14px, 2vw, 22px);
}

.page-faq .faq-hero__note p {
  margin: 0 0 16px;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--mist);
  max-width: 46ch;
}

.page-faq .faq-hero__note .faq-hero__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--white);
  opacity: .78;
}

.page-faq .faq-hero__note .faq-hero__meta .num {
  color: var(--cyan);
  font-size: 1.05rem;
}

.page-faq .faq-hero__mark {
  position: absolute;
  right: -3%;
  bottom: -12%;
  font-family: var(--font-mono);
  font-size: clamp(5rem, 17vw, 15rem);
  line-height: 1;
  letter-spacing: -.04em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(53, 230, 218, .14);
  pointer-events: none;
  user-select: none;
}

/* ---------- 分组跳转条 ---------- */
.page-faq .faq-jumpwrap {
  padding: 0 0 clamp(8px, 2vw, 16px);
}

.page-faq .faq-jump {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 14px 0;
  border-top: 1px solid var(--steel);
  border-bottom: 1px solid var(--steel);
  scrollbar-width: none;
}

.page-faq .faq-jump::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-jump__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 16px;
  border: 1px solid var(--steel);
  border-left: 3px solid var(--faq-tone);
  background: var(--console);
  color: var(--white);
  text-decoration: none;
  font-size: .88rem;
  transition: background 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-jump__item .num {
  font-size: .78rem;
  color: var(--faq-tone);
}

.page-faq .faq-jump__count {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--mist);
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  background: var(--cyan-veil);
  border-color: var(--faq-tone);
  outline: none;
}

.page-faq .faq-jump__item--a { --faq-tone: var(--cyan); }
.page-faq .faq-jump__item--b { --faq-tone: #35b6e6; }
.page-faq .faq-jump__item--c { --faq-tone: var(--signal); }
.page-faq .faq-jump__item--d { --faq-tone: #7fb6cc; }
.page-faq .faq-jump__item--e { --faq-tone: var(--coral); }

/* ---------- 问答组 ---------- */
.page-faq .faq-body {
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-faq .faq-group {
  padding: clamp(34px, 5vw, 66px) 0;
  border-top: 1px solid var(--steel);
  scroll-margin-top: 80px;
}

.page-faq .faq-group:first-child {
  border-top: 0;
}

.page-faq .faq-group--a { --faq-tone: var(--cyan); }
.page-faq .faq-group--b { --faq-tone: #35b6e6; }
.page-faq .faq-group--c { --faq-tone: var(--signal); }
.page-faq .faq-group--d { --faq-tone: #7fb6cc; }
.page-faq .faq-group--e { --faq-tone: var(--coral); }

.page-faq .faq-group__head {
  position: relative;
  padding-left: 20px;
  margin-bottom: clamp(14px, 2vw, 24px);
}

.page-faq .faq-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: .3em;
  bottom: .3em;
  width: 4px;
  border-radius: 2px;
  background: var(--faq-tone);
  transform-origin: top center;
}

.page-faq .faq-group__title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-faq .faq-group__num {
  font-size: clamp(1.1rem, 2.6vw, 1.6rem);
  color: var(--faq-tone);
  letter-spacing: -.02em;
}

.page-faq .faq-group__title h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.1;
  letter-spacing: -.005em;
}

.page-faq .faq-group__kicker {
  margin: 8px 0 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--mist);
}

@keyframes faq-band-in {
  from { transform: scaleY(.18); opacity: .3; }
  to   { transform: scaleY(1); opacity: 1; }
}

@supports (animation-timeline: view()) {
  .page-faq .faq-group__head::before {
    animation: faq-band-in linear both;
    animation-timeline: view();
    animation-range: entry 15% cover 28%;
  }
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 2px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--white);
  transition: color 160ms var(--ease), background 160ms var(--ease);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--faq-tone);
}

.page-faq .faq-item[open] > summary {
  color: var(--faq-tone);
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--faq-tone);
  background: rgba(53, 230, 218, .05);
  outline: none;
}

.page-faq .faq-a {
  padding: 0 2px 18px;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 46ch;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-a strong {
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--white);
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: clamp(22px, 3.5vw, 38px) 0 0;
  max-width: 720px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--console);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06) brightness(.92);
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--steel);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-help {
  margin-top: clamp(32px, 5vw, 60px);
  padding: clamp(26px, 4.5vw, 52px);
  border: 1px solid var(--steel);
  border-radius: var(--radius-soft);
  background:
    linear-gradient(135deg, rgba(255, 107, 74, .16) 0%, rgba(11, 44, 66, .94) 52%, var(--console) 100%);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}

.page-faq .faq-help__main .label {
  color: var(--coral);
  letter-spacing: .2em;
}

.page-faq .faq-help__main h2 {
  margin: 12px 0 14px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.15;
}

.page-faq .faq-help__main p {
  margin: 0 0 22px;
  max-width: 52ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-help__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  align-content: start;
  border-top: 1px solid var(--steel);
  padding-top: 18px;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--white);
}

.page-faq .faq-help__list li span {
  flex: none;
  min-width: 5.4em;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-faq .faq-help__list a {
  color: var(--cyan);
  text-decoration: none;
}

.page-faq .faq-help__list a:hover,
.page-faq .faq-help__list a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: end;
  }

  .page-faq .faq-item {
    display: grid;
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    column-gap: clamp(24px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-item > summary {
    padding: 20px 2px;
  }

  .page-faq .faq-a {
    padding: 20px 0 22px;
  }

  .page-faq .faq-figure {
    margin-left: auto;
    margin-right: 0;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .9fr);
    align-items: start;
  }

  .page-faq .faq-help__list {
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--steel);
    padding-left: clamp(18px, 3vw, 32px);
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-group__head {
    padding-left: 26px;
  }

  .page-faq .faq-group__head::before {
    width: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-group__head::before {
    animation: none;
    transform: none;
    opacity: 1;
  }

  .page-faq .faq-jump__item,
  .page-faq .faq-item > summary {
    transition: none;
  }
}
<<<END>>>