.page-faq {
  background: var(--ink-900);
  color: var(--text);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(26px, 5vw, 50px)) 0 clamp(34px, 6vw, 64px);
  background:
    radial-gradient(760px 380px at 86% -14%, rgba(35, 230, 200, .16), transparent 64%),
    radial-gradient(620px 340px at 4% 112%, rgba(243, 184, 75, .12), transparent 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 80%);
  border-bottom: 1px solid var(--line-mist);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(20, 92, 102, .38) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(20, 92, 102, .38) 0 1px, transparent 1px 88px);
  opacity: .45;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 94%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 94%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(29px, 6.2vw, 54px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: .01em;
  margin: 16px 0 0;
  color: var(--paper);
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-hero__jump {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4.5vw, 48px);
  padding-top: clamp(26px, 5vw, 50px);
  padding-bottom: clamp(44px, 7vw, 88px);
}

/* ---------- 左侧坐标索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  padding: 2px 0 2px 14px;
  border-left: 2px solid transparent;
  border-image: var(--grad-cool) 1;
}

.page-faq .faq-index__label {
  margin: 0 0 10px;
  padding-left: 8px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--text-mute);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 9px 8px;
  border-radius: var(--radius);
  color: var(--text-dim);
  text-decoration: none;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--paper);
  background-color: rgba(35, 230, 200, .08);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  box-shadow: inset 0 0 0 1px rgba(243, 184, 75, .38);
  color: var(--paper);
}

.page-faq .faq-index__no {
  font-size: 12px;
  color: var(--gold);
}

.page-faq .faq-index__name {
  font-size: 14px;
}

.page-faq .faq-index__count {
  font-size: 11px;
  color: var(--text-mute);
}

.page-faq .faq-index__total {
  margin: 12px 0 0;
  padding: 10px 0 0 8px;
  border-top: 1px dashed var(--line-faint);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 章节 ---------- */
.page-faq .faq-body {
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
  padding-bottom: clamp(28px, 4.6vw, 52px);
  margin-bottom: clamp(28px, 4.6vw, 52px);
  border-bottom: 1px solid var(--line-mist);
}

.page-faq .faq-section:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 0;
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 10px;
  row-gap: 6px;
  align-items: baseline;
  margin-bottom: 18px;
  padding-left: 14px;
  position: relative;
}

.page-faq .faq-section__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 3px;
  background: var(--grad-cool);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.6vw, 31px);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .faq-section__note {
  grid-column: 1 / -1;
  margin: 0;
  max-width: 66ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-mute);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-list {
  border-top: 1px solid var(--line-mist);
}

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

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 16px;
  align-items: start;
  gap: 10px;
  padding: 14px 4px;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--paper);
  transition: color .18s var(--ease);
}

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

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
  box-shadow: inset 0 0 0 1px rgba(243, 184, 75, .4);
  color: var(--paper);
}

.page-faq .qa__no {
  font-size: 11.5px;
  color: var(--gold);
  letter-spacing: .04em;
  padding-top: 3px;
}

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

.page-faq .qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 4px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--teal);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 2px;
}

.page-faq .qa__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 2px;
}

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

.page-faq .qa__a {
  padding: 0 26px 16px 4px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .qa__a p {
  margin: 0 0 8px;
}

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

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-faq .faq-figure .figure__media {
  border: 1px solid var(--line-mist);
  background: var(--ink-800);
  overflow: hidden;
}

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

.page-faq .faq-figure .figure__caption {
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-mute);
}

/* ---------- 术语注释卡 ---------- */
.page-faq .terms-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-faq .term-card {
  position: relative;
  min-width: 0;
  padding: 13px 14px 13px 16px;
  background: linear-gradient(135deg, rgba(13, 41, 66, .92) 0%, rgba(6, 24, 38, .72) 100%);
  border: 1px solid var(--line-mist);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-faq .term-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--grad-cool);
}

.page-faq .term-card--coral::before {
  background: var(--coral);
}

.page-faq .term-card--band::before {
  background: var(--grad-band);
}

.page-faq .term-card:hover {
  border-color: var(--line-teal);
}

.page-faq .term-card__key {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: .03em;
  color: var(--gold);
}

.page-faq .term-card--coral .term-card__key {
  color: var(--coral);
}

.page-faq .term-card__val {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(30px, 5vw, 56px);
  padding: clamp(20px, 4vw, 34px);
  background:
    radial-gradient(420px 200px at 100% 0%, rgba(35, 230, 200, .14), transparent 70%),
    linear-gradient(120deg, rgba(13, 41, 66, .95) 0%, rgba(6, 24, 38, .82) 100%);
  border: 1px solid var(--line-teal);
}

.page-faq .faq-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 28px);
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-faq .terms-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .qa__q {
    font-size: 15px;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-grid {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
    padding-top: 6px;
  }

  .page-faq .faq-hero__lede {
    font-size: 16px;
  }

  .page-faq .qa__a {
    padding-right: 56px;
  }
}

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