.page-faq {
  --faq-rail-w: 244px;
  background: var(--pitch);
  color: var(--bone);
  padding-bottom: clamp(48px, 8vw, 88px);
  overflow-x: hidden;
}

.page-faq .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 22px);
  font-size: 13px;
  color: var(--stone);
}

.page-faq .breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-faq .breadcrumb-list a {
  color: var(--stone);
  text-decoration: none;
}

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

.page-faq .breadcrumb-current {
  color: var(--bone);
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: clamp(18px, 3.4vw, 34px);
  padding-bottom: clamp(24px, 4vw, 38px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  align-items: end;
}

.page-faq .faq-h1 {
  margin: 14px 0 16px;
  font-size: clamp(30px, 5.6vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--chalk);
  max-width: 20ch;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.75;
  color: var(--stone);
}

.page-faq .faq-hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--turf);
  overflow: hidden;
}

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

.page-faq .faq-hero-media::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 58%;
  height: 4px;
  background: var(--lime);
}

.page-faq .faq-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
}

.page-faq .faq-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  font-size: 13px;
  color: var(--stone);
}

.page-faq .faq-stats .num {
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--lime);
}

/* ---------- 主栅格 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(26px, 5vw, 44px);
}

.page-faq .faq-rail {
  display: grid;
  gap: 18px;
  align-content: start;
  min-width: 0;
}

.page-faq .faq-rail-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--clay);
  text-transform: uppercase;
}

.page-faq .rail-nav {
  display: grid;
  gap: 2px;
}

.page-faq .rail-link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 10px 10px 10px 12px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  line-height: 1.4;
  color: var(--stone);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .rail-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clay);
}

.page-faq .rail-link:hover,
.page-faq .rail-link:focus-visible {
  border-left-color: var(--lime);
  background: rgba(198, 242, 74, 0.06);
  color: var(--chalk);
  outline: none;
}

.page-faq .rail-link:hover .rail-idx,
.page-faq .rail-link:focus-visible .rail-idx {
  color: var(--lime);
}

.page-faq .rail-links {
  display: grid;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-faq .rail-tile {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  background: var(--turf);
  border: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.4;
  color: var(--bone);
  text-decoration: none;
  clip-path: polygon(14px 0, 100% 0, 100% 100%, 0 100%, 0 14px);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .rail-arrow {
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .rail-tile:hover,
.page-faq .rail-tile:focus-visible {
  border-color: var(--lime);
  color: var(--chalk);
  outline: none;
}

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

.page-faq .faq-group {
  display: flow-root;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 54px);
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-bottom: 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group-idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--clay);
  padding-top: 5px;
}

.page-faq .faq-group-head h2 {
  margin: 0 0 4px;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--chalk);
}

.page-faq .faq-group-head .note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

.page-faq .faq-media {
  margin: 14px 0 16px;
}

.page-faq .faq-media img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--turf);
}

.page-faq .faq-media figcaption {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--clay);
}

/* ---------- 手风琴 ---------- */
.page-faq .acc-item {
  position: relative;
  padding-left: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .acc-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-faq .acc-item[open]::before {
  background: var(--lime);
}

.page-faq .faq-summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: start;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--clay);
  transition: color var(--dur) var(--ease);
}

.page-faq .acc-item[open] .faq-num {
  color: var(--lime);
}

.page-faq .faq-q {
  font-size: 16px;
  line-height: 1.55;
  font-weight: 700;
  color: var(--bone);
  transition: color var(--dur) var(--ease);
}

.page-faq .acc-item[open] .faq-q {
  color: var(--chalk);
}

.page-faq .faq-sign {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-sign::before,
.page-faq .faq-sign::after {
  content: "";
  position: absolute;
  background: var(--stone);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .faq-sign::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .acc-item[open] .faq-sign::before {
  background: var(--lime);
}

.page-faq .acc-item[open] .faq-sign::after {
  transform: scaleY(0);
}

.page-faq .acc-body {
  padding: 0 0 18px 44px;
}

.page-faq .acc-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
  max-width: 52ch;
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 26px;
  margin-top: clamp(34px, 5vw, 54px);
  padding: clamp(20px, 3.4vw, 30px);
  background: linear-gradient(118deg, var(--turf) 0%, var(--midnight) 100%);
  border: 1px solid var(--line-strong);
  clip-path: polygon(18px 0, 100% 0, 100% 100%, 0 100%, 0 18px);
}

.page-faq .faq-cta-copy {
  min-width: 0;
}

.page-faq .faq-cta-title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.page-faq .faq-cta-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--stone);
}

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

.page-faq .faq-cta-actions .btn {
  text-decoration: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-media {
    float: right;
    width: 178px;
    margin: 8px 0 14px 22px;
  }

  .page-faq .faq-summary {
    grid-template-columns: 42px minmax(0, 1fr) 16px;
    gap: 12px;
    padding: 17px 0;
  }

  .page-faq .acc-body {
    padding-left: 54px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-hero-media {
    margin-bottom: 4px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 60px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .rail-link,
  .page-faq .rail-tile,
  .page-faq .faq-num,
  .page-faq .faq-q,
  .page-faq .faq-sign::before,
  .page-faq .faq-sign::after,
  .page-faq .acc-item::before {
    transition: none;
  }
}
<<<END>>>