.page-faq {
  --faq-card: rgba(16, 30, 41, 0.72);
  --faq-card-open: rgba(16, 30, 41, 0.96);
  --faq-mint-line: rgba(143, 227, 208, 0.6);
  background: var(--ink-800);
  color: var(--paper);
  padding-bottom: clamp(48px, 7vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 5vw, 44px) 0 clamp(40px, 6vw, 72px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 90% at 88% -10%, rgba(255, 107, 53, 0.16), transparent 62%),
    radial-gradient(50% 70% at 4% 100%, rgba(143, 227, 208, 0.1), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb {
  color: var(--fog);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  margin-bottom: clamp(28px, 5vw, 56px);
}

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

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

.page-faq .faq-hero .breadcrumb__sep {
  margin: 0 8px;
  color: var(--slate-soft);
}

.page-faq .faq-hero__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 12ch;
  color: var(--paper-white);
}

.page-faq .faq-hero__lead {
  max-width: 56ch;
  color: var(--fog);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  margin: 0 0 clamp(24px, 4vw, 36px);
}

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

.page-faq .faq-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 107, 53, 0.55);
  background: rgba(255, 107, 53, 0.12);
  color: var(--paper-white);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-jump::after {
  content: "↓";
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-faq .faq-jump:hover,
.page-faq .faq-jump:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
}

.page-faq .faq-jump:hover::after,
.page-faq .faq-jump:focus-visible::after {
  color: var(--ink-900);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
  align-items: start;
}

/* ---------- 左侧分类轨道 ---------- */
.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
  margin: 0 0 12px;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line);
  color: var(--fog);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--orange);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--orange);
  color: var(--paper-white);
  background: rgba(255, 107, 53, 0.08);
}

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

.page-faq .faq-group {
  margin-bottom: clamp(40px, 6vw, 72px);
  scroll-margin-top: calc(var(--shell-top) + 24px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  margin: 0;
  color: var(--paper-white);
}

.page-faq .faq-media {
  margin: 0 0 22px;
}

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

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 20px;
}

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

.page-faq .faq-split__aside {
  margin: 0;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--faq-card);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(255, 107, 53, 0.4);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-mint-line);
  background: var(--faq-card-open);
  box-shadow: inset 3px 0 0 var(--mint);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--paper-white);
  font-size: clamp(15px, 1.7vw, 17px);
  font-weight: 700;
  line-height: 1.55;
}

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--orange);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--mint);
}

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

.page-faq .faq-item__body {
  padding: 0 18px 18px;
  color: var(--fog);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-item__body p {
  margin: 0 0 10px;
  max-width: 68ch;
}

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

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

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--paper-white);
}

/* ---------- 底部帮助块 ---------- */
.page-faq .faq-help {
  background: var(--paper);
  color: var(--ink-800);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 44px);
}

.page-faq .faq-help__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--ink-900);
}

.page-faq .faq-help__text {
  margin: 0 0 22px;
  max-width: 60ch;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-help__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--ink-800);
  background: var(--ink-800);
  color: var(--paper);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-help__btn:hover,
.page-faq .faq-help__btn:focus-visible {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-900);
}

.page-faq .faq-help__btn--ghost {
  background: transparent;
  color: var(--ink-800);
  border-color: rgba(11, 23, 32, 0.32);
}

.page-faq .faq-help__btn--ghost:hover,
.page-faq .faq-help__btn--ghost:focus-visible {
  background: var(--ink-800);
  border-color: var(--ink-800);
  color: var(--paper);
}

.page-faq .faq-help__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.page-faq .faq-help__meta a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 23, 32, 0.25);
  padding-bottom: 2px;
}

.page-faq .faq-help__meta a:hover,
.page-faq .faq-help__meta a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 中屏及以上 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-faq .faq-split__aside {
    position: sticky;
    top: calc(var(--shell-top) + 24px);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--shell-top) + 28px);
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__link {
    border-radius: var(--radius-md);
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 10px 14px;
    white-space: normal;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-color: var(--line);
    border-left-color: var(--orange);
  }

  .page-faq .faq-item__q {
    padding: 18px 22px;
  }

  .page-faq .faq-item__body {
    padding: 0 22px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump,
  .page-faq .faq-rail__link,
  .page-faq .faq-item,
  .page-faq .faq-help__btn {
    transition: none;
  }
}
<<<END>>>