.page-faq {
  --faq-a: var(--nebula);
  --faq-b: var(--orange);
  --faq-c: var(--moss);
  --faq-d: var(--legacy);
  background: var(--void);
  color: var(--silver);
  font-family: var(--font-body);
  overflow-x: hidden;
}

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

/* ---------- 首屏：四条情境轨道 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 40px) 0 clamp(30px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(168, 139, 250, .18), transparent 58%),
    radial-gradient(90% 70% at 0% 110%, rgba(126, 154, 166, .10), transparent 60%),
    var(--void);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: end;
  margin-top: clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero__lead .eyebrow {
  margin: 0 0 12px;
  color: var(--nebula);
}

.page-faq .faq-hero__lead h1 {
  margin: 0 0 clamp(14px, 2vw, 22px);
  font-family: var(--font-head);
  font-size: clamp(2rem, 6vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -.045em;
  line-height: 1.06;
  color: var(--silver);
}

.page-faq .faq-hero__lead .lead {
  margin: 0;
  max-width: 54ch;
  font-size: clamp(.96rem, 1.4vw, 1.1rem);
  line-height: 1.8;
  color: var(--silver-dim);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--deep);
}

.page-faq .faq-hero__figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.85);
}

.page-faq .faq-figure__cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--silver-dim);
}

/* 四类情境选择器 */
.page-faq .faq-picker {
  list-style: none;
  margin: clamp(22px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-picker__cell {
  --accent: var(--nebula);
  display: flex;
}

.page-faq .faq-picker__cell--a { --accent: var(--faq-a); }
.page-faq .faq-picker__cell--b { --accent: var(--faq-b); }
.page-faq .faq-picker__cell--c { --accent: var(--faq-c); }
.page-faq .faq-picker__cell--d { --accent: var(--faq-d); }

.page-faq .faq-picker__cell a {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--deep);
  border-top: 2px solid var(--accent);
  color: var(--silver);
  text-decoration: none;
  transition: background .16s var(--ease), color .16s var(--ease);
}

.page-faq .faq-picker__cell a:hover,
.page-faq .faq-picker__cell a:focus-visible {
  background: var(--panel);
  outline: none;
}

.page-faq .faq-picker__no {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--accent);
}

.page-faq .faq-picker__name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.page-faq .faq-picker__cell a:hover .faq-picker__name {
  color: var(--accent);
}

.page-faq .faq-picker__desc {
  font-size: .86rem;
  line-height: 1.65;
  color: var(--silver-dim);
}

/* ---------- 左索引 + 右手风琴 ---------- */
.page-faq .faq-body {
  padding: clamp(32px, 5vw, 72px) 0;
}

.page-faq .faq-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-faq .faq-index {
  border-top: 2px solid var(--line-2);
  padding-top: 14px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--legacy);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-index__list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 11px 2px;
  border-bottom: 1px solid var(--line);
  color: var(--silver-dim);
  font-size: .92rem;
  text-decoration: none;
  transition: color .14s var(--ease), border-color .14s var(--ease);
}

.page-faq .faq-index__list a .mono {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--silver-dim);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--nebula);
  border-bottom-color: var(--line-2);
  outline: none;
}

.page-faq .faq-index__list a:hover .mono {
  color: var(--nebula);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  font-size: .82rem;
  line-height: 1.75;
  color: var(--silver-dim);
}

/* 分组 */
.page-faq .faq-group {
  --accent: var(--nebula);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group--a { --accent: var(--faq-a); }
.page-faq .faq-group--b { --accent: var(--faq-b); }
.page-faq .faq-group--c { --accent: var(--faq-c); }
.page-faq .faq-group--d { --accent: var(--faq-d); }

.page-faq .faq-group + .faq-group {
  margin-top: clamp(30px, 4.5vw, 54px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-2);
  margin-bottom: 4px;
}

.page-faq .faq-group__tag {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.25rem, 2.4vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -.035em;
  color: var(--silver);
}

/* 手风琴 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: start;
  padding: 16px 4px 16px 14px;
  border-left: 2px solid transparent;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.65;
  color: var(--silver);
  transition: color .14s var(--ease), border-color .14s var(--ease), background .14s var(--ease);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.35;
  color: var(--silver-dim);
  transition: color .14s var(--ease);
}

.page-faq .faq-item summary:hover {
  color: var(--nebula);
  background: rgba(232, 236, 245, .02);
}

.page-faq .faq-item summary:hover::after {
  color: var(--nebula);
}

.page-faq .faq-item[open] summary {
  border-left-color: var(--accent);
  color: var(--silver);
}

.page-faq .faq-item[open] summary::after {
  content: "\2212";
  color: var(--accent);
}

.page-faq .faq-item__body {
  padding: 0 4px 20px 16px;
  border-left: 2px solid var(--accent);
  font-size: .95rem;
  line-height: 1.85;
  color: var(--silver-dim);
  max-width: 64ch;
}

.page-faq .faq-item__body p {
  margin: 0 0 .7em;
}

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

.page-faq .faq-item__body a {
  color: var(--silver);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
  transition: color .14s var(--ease), text-decoration-color .14s var(--ease);
}

.page-faq .faq-item__body a:hover,
.page-faq .faq-item__body a:focus-visible {
  color: var(--nebula);
  text-decoration-color: var(--nebula);
  outline: none;
}

/* ---------- 联系章节 ---------- */
.page-faq .faq-contact {
  padding: clamp(32px, 5vw, 72px) 0 clamp(44px, 7vw, 92px);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(168, 139, 250, .08), transparent 62%),
    var(--deep);
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-contact__main .eyebrow {
  margin: 0 0 10px;
  color: var(--orange);
}

.page-faq .faq-contact__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -.04em;
  line-height: 1.2;
  color: var(--silver);
}

.page-faq .faq-contact__lead {
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 56ch;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--silver-dim);
}

.page-faq .faq-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__list li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__key {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--legacy);
}

.page-faq .faq-contact__val {
  font-size: 1rem;
  font-weight: 500;
  color: var(--silver);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__sub {
  font-size: .82rem;
  color: var(--silver-dim);
}

.page-faq .faq-code {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--orange);
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--orange-hi);
  background: rgba(255, 157, 77, .08);
}

.page-faq .faq-contact__more {
  margin: clamp(18px, 3vw, 26px) 0 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--silver-dim);
}

.page-faq .faq-contact__more a {
  color: var(--silver);
  text-decoration: underline;
  text-decoration-color: var(--line-2);
  text-underline-offset: 3px;
  transition: color .14s var(--ease), text-decoration-color .14s var(--ease);
}

.page-faq .faq-contact__more a:hover,
.page-faq .faq-contact__more a:focus-visible {
  color: var(--nebula);
  text-decoration-color: var(--nebula);
  outline: none;
}

.page-faq .faq-contact__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-contact__figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(.85);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-picker {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: stretch;
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-picker {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<END>>>