.page-faq {
  --qa-indent: 66px;
  --faq-gap: clamp(26px, 4.5vw, 56px);
  position: relative;
  color: var(--text);
  padding-bottom: clamp(48px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(34px, 7vw, 76px)) 0 clamp(32px, 5vw, 60px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(42, 74, 66, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 74, 66, 0.6) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(125% 95% at 18% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(125% 95% at 18% 0%, #000 0%, transparent 74%);
  opacity: 0.65;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: -18% -12% auto -12%;
  height: 78%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 78% at 16% 32%, rgba(59, 232, 198, 0.14), transparent 70%),
    radial-gradient(52% 72% at 84% 8%, rgba(30, 156, 134, 0.18), transparent 72%),
    radial-gradient(40% 60% at 62% 88%, rgba(255, 122, 47, 0.08), transparent 74%);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4.5vw, 54px);
  align-items: end;
}

.page-faq .faq-hero__eyebrow {
  margin: 20px 0 0;
  color: var(--cyan);
  font-family: var(--font-mono);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(2.125rem, 6.1vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -0.012em;
  max-width: 15em;
}

.page-faq .faq-hero__lead {
  margin: 22px 0 0;
  max-width: 36em;
  color: var(--muted);
  font-size: var(--fs-16);
  line-height: 1.88;
}

.page-faq .faq-hero__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
}

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

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 21, 18, 0) 42%, rgba(10, 21, 18, 0.9) 100%);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  padding-top: clamp(24px, 4vw, 48px);
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

/* 左侧索引刻度 */

.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: rail;
}

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

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 12px 6px 12px 0;
  color: var(--muted);
  font-size: var(--fs-14);
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-faq .faq-rail__link::before {
  content: counter(rail, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--teal);
  transition: color 0.24s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text);
  padding-left: 8px;
}

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

.page-faq .faq-rail__figure {
  margin: 20px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-2);
  overflow: hidden;
  max-width: 320px;
}

.page-faq .faq-rail__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.85;
}

/* 问答组 */

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 6vw, 68px);
}

.page-faq .faq-group__head {
  position: relative;
  padding: 0 0 14px 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(59, 232, 198, 0));
}

.page-faq .faq-group__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 8px 0 0;
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(1.375rem, 3.2vw, 2rem);
  line-height: 1.24;
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: var(--fs-14);
  line-height: 1.7;
}

/* 单条问答 */

.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--line-soft);
  transition: background-color 0.24s var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: 50% 0;
  transition: transform 0.32s var(--ease);
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa[open] {
  background-color: rgba(22, 33, 31, 0.72);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 18px 4px 18px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--text);
  font-family: var(--font-narrow);
  font-weight: 700;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.62;
  transition: color 0.24s var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

.page-faq .qa__q:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--teal);
  padding-top: 5px;
  transition: color 0.24s var(--ease);
}

.page-faq .qa[open] .qa__num {
  color: var(--orange);
}

.page-faq .qa__mark {
  position: relative;
  width: 13px;
  height: 13px;
  margin-top: 8px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  border-radius: 1px;
  transition: transform 0.28s var(--ease), opacity 0.28s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 13px;
  height: 1px;
}

.page-faq .qa__mark::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 13px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0.001);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 4px 24px var(--qa-indent);
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 40em;
  color: var(--muted);
  font-size: var(--fs-16);
  line-height: 1.85;
}

.page-faq .qa__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-faq .qa__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  text-decoration: none;
  background: rgba(244, 251, 248, 0.02);
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease), color 0.24s var(--ease);
}

.page-faq .qa__link:hover,
.page-faq .qa__link:focus-visible {
  border-color: var(--cyan);
  background: rgba(59, 232, 198, 0.1);
  color: var(--text);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-outro {
  margin-top: clamp(48px, 8vw, 96px);
}

.page-faq .faq-outro__inner {
  position: relative;
  border-top: 1px solid var(--line);
  padding-top: clamp(26px, 4vw, 44px);
}

.page-faq .faq-outro__inner::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(60px, 14vw, 160px);
  height: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 47, 0));
}

.page-faq .faq-outro__eyebrow {
  margin: 0;
  color: var(--orange);
  font-family: var(--font-mono);
  letter-spacing: 0.2em;
}

.page-faq .faq-outro__title {
  margin: 12px 0 0;
  font-family: var(--font-narrow);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.6vw, 2.25rem);
  line-height: 1.26;
  max-width: 22em;
}

.page-faq .faq-outro__text {
  margin: 16px 0 0;
  max-width: 42em;
  color: var(--muted);
  font-size: var(--fs-16);
  line-height: 1.88;
}

.page-faq .faq-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 620px) {
  .page-faq {
    --qa-indent: 16px;
  }

  .page-faq .qa__q {
    grid-template-columns: 30px minmax(0, 1fr) auto;
    gap: 10px;
    padding: 16px 2px 16px 12px;
  }

  .page-faq .faq-rail__figure {
    max-width: 100%;
  }
}

@media (max-width: 400px) {
  .page-faq .qa__q {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-faq .qa__num {
    grid-column: 1 / -1;
    padding-top: 0;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(34px, 5vw, 76px);
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-rail__figure img {
    height: 210px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa::before,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>