.page-faq {
  --faq-rail: 268px;
  --faq-sticky: 104px;
  --faq-gap: clamp(20px, 3vw, 40px);
  position: relative;
  background: var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .breadcrumbs {
  padding-top: clamp(14px, 2vw, 22px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 58px) 0 clamp(26px, 4vw, 52px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -42%;
  right: -12%;
  width: clamp(260px, 46vw, 560px);
  aspect-ratio: 1 / 1;
  border-radius: 42% 58% 54% 46% / 56% 44% 58% 42%;
  background: radial-gradient(circle at 42% 44%, rgba(51, 242, 192, .30), rgba(18, 62, 92, 0) 68%);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--orange) 0 18%, var(--mint) 18% 46%, var(--line) 46% 100%);
  opacity: .7;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 860px;
}

.page-faq .faq-title {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 5.6vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.8;
  color: rgba(244, 235, 221, .80);
}

/* ---------- 双栏布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  padding-top: clamp(24px, 3.4vw, 44px);
}

.page-faq .faq-layout > * {
  min-width: 0;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 35, 56, .78);
  padding: 16px 14px 18px;
}

.page-faq .faq-index__title {
  margin: 0 0 12px 4px;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--paper);
  text-decoration: none;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover {
  background: rgba(18, 62, 92, .62);
  border-color: var(--line-strong);
  transform: translateX(2px);
}

.page-faq .faq-index__list a:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

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

.page-faq .idx-label {
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.4;
  overflow-wrap: anywhere;
}

.page-faq .idx-count {
  min-width: 24px;
  padding: 2px 7px;
  border-radius: var(--pill);
  background: rgba(51, 242, 192, .12);
  color: var(--mint);
  font-size: 11px;
  text-align: center;
}

.page-faq .faq-index__note {
  margin: 14px 4px 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
}

.page-faq .faq-group {
  scroll-margin-top: clamp(72px, 12vw, 108px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-bottom: 14px;
}

.page-faq .faq-group__num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__head .pill-tag {
  margin-left: auto;
}

.page-faq .faq-group__band {
  margin: 0 0 18px;
  padding: 13px 16px;
  border-radius: var(--radius-md);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .faq-group__band--paper {
  background: var(--paper);
  color: var(--ink-900);
}

.page-faq .faq-group__band--deep {
  background: var(--ink-700);
  color: rgba(244, 235, 221, .92);
  border: 1px solid var(--line);
}

.page-faq .faq-figure {
  margin: 0 0 16px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(140deg, var(--ink-800), var(--ink-700));
}

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

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--ink-800);
  margin-bottom: 10px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  border-color: rgba(51, 242, 192, .44);
  background: #0C2A42;
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  border-radius: var(--radius-md);
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

.page-faq .faq-q {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-sign {
  flex: none;
  margin-left: auto;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--mist);
  font-family: var(--font-mono);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-sign::before {
  content: "+";
  font-size: 15px;
  line-height: 1;
}

.page-faq .faq-item[open] .faq-sign {
  color: var(--mint);
  border-color: rgba(51, 242, 192, .55);
  background: rgba(51, 242, 192, .10);
}

.page-faq .faq-item[open] .faq-sign::before {
  content: "\2212";
}

.page-faq .faq-a {
  padding: 0 16px 17px;
}

.page-faq .faq-a p {
  margin: 0;
  padding-left: 13px;
  border-left: 2px solid rgba(51, 242, 192, .40);
  font-size: 15px;
  line-height: 1.9;
  color: rgba(244, 235, 221, .78);
  overflow-wrap: anywhere;
}

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

/* ---------- 尾部 ---------- */
.page-faq .faq-next {
  margin-top: clamp(6px, 1.4vw, 14px);
  padding: clamp(22px, 3.2vw, 36px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(142deg, rgba(255, 90, 31, .18) 0%, rgba(18, 62, 92, .58) 52%, rgba(51, 242, 192, .12) 100%);
}

.page-faq .faq-next__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
}

.page-faq .faq-next__text {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 235, 221, .84);
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.page-faq .faq-next__actions .link-more {
  font-size: 14.5px;
  color: var(--mint);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  .page-faq .faq-item > summary {
    padding: 17px 20px;
  }

  .page-faq .faq-q {
    font-size: 16.5px;
  }

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

  .page-faq .faq-a p {
    font-size: 15.5px;
    line-height: 1.95;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
  }

  .page-faq .faq-index__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-group__band {
    padding: 15px 20px;
    font-size: 15px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail: 300px;
  }

  .page-faq .faq-title {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-index__list a,
  .page-faq .faq-sign {
    transition: none;
  }

  .page-faq .faq-item:hover,
  .page-faq .faq-index__list a:hover {
    transform: none;
  }
}
<<<END>>>