.page-faq {
  --faq-rail-w: 246px;
  background: var(--night);
  color: var(--text);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 46px) 0 clamp(36px, 6vw, 68px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(72% 62% at 86% 0%, rgba(242, 163, 58, 0.16), transparent 62%),
    linear-gradient(170deg, rgba(14, 38, 32, 0) 44%, var(--moss) 44%, var(--moss) 100%);
  pointer-events: none;
}

.page-faq .faq-hero .container {
  position: relative;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-size: clamp(29px, 5.4vw, 56px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 15em;
}

.page-faq .faq-hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 3px;
  margin-top: 20px;
  background: var(--amber);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text-mid);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

.page-faq .faq-hero__figure .figure__media {
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--amber);
  background: linear-gradient(150deg, var(--stand), var(--archive));
  overflow: hidden;
}

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

.page-faq .faq-hero__figure .figure__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 索引轨 + 问答 ---------- */
.page-faq .faq-body {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(7, 17, 15, 0.55), rgba(11, 27, 43, 0));
}

.page-faq .faq-layout {
  display: grid;
  gap: 22px;
  padding: clamp(28px, 5vw, 56px) 0 clamp(34px, 6vw, 66px);
}

.page-faq .faq-rail {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 38, 32, 0.94), rgba(7, 17, 15, 0.94));
  padding: 18px 16px;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail__item {
  flex: 0 0 auto;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  color: var(--text-mid);
  font-size: 13px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: var(--amber);
  color: var(--text);
  background: rgba(28, 42, 51, 0.6);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-list {
  min-width: 0;
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .faq-item__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  width: 100%;
  padding: 20px 14px 20px 16px;
  background: none;
  border: 0;
  border-left: 2px solid transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-item__trigger:hover {
  background: rgba(28, 42, 51, 0.42);
}

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

.page-faq .faq-item__trigger[aria-expanded="true"] {
  border-left-color: var(--amber);
  background: rgba(28, 42, 51, 0.58);
}

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  color: var(--amber);
  padding-top: 2px;
}

.page-faq .faq-item__q {
  display: block;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.01em;
}

.page-faq .faq-item__q .tag {
  margin-left: 8px;
  vertical-align: 2px;
  font-weight: 400;
}

.page-faq .faq-item .disclosure__mark {
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--amber);
  transition: transform 0.2s ease;
}

.page-faq .faq-item__trigger[aria-expanded="true"] .disclosure__mark {
  transform: rotate(45deg);
}

.page-faq .faq-answer {
  padding: 2px 16px 24px 30px;
  margin-left: 2px;
  border-left: 1px solid var(--line-strong);
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-mid);
}

.page-faq .faq-answer p {
  margin: 0 0 12px;
}

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

.page-faq .faq-inline-link {
  color: var(--celadon);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 163, 154, 0.42);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--amber-soft);
  border-bottom-color: var(--amber-soft);
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--amber-soft);
  word-break: break-all;
}

.page-faq .faq-points {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-faq .faq-points li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.65;
}

.page-faq .faq-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--amber);
}

.page-faq .faq-excerpt {
  margin: 14px 0;
  padding: 13px 16px;
  background: var(--paper);
  color: #14211e;
  border-left: 3px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}

/* ---------- 底部横向带 ---------- */
.page-faq .faq-band {
  position: relative;
  border-top: 1px solid var(--line);
  background: linear-gradient(108deg, var(--moss) 0%, var(--archive) 58%, var(--indigo) 58%, var(--indigo) 100%);
}

.page-faq .faq-band__inner {
  display: grid;
  gap: 26px;
  padding: clamp(32px, 5vw, 62px) 0;
}

.page-faq .faq-band__copy h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-faq .faq-band__copy p {
  margin: 16px 0 24px;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-mid);
}

.page-faq .faq-band__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  overflow: hidden;
}

.page-faq .faq-band__figure .figure__media {
  background: linear-gradient(160deg, var(--stand), var(--archive));
}

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

/* ---------- 桌面布局 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
    gap: 48px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
    padding: 22px 20px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 2px;
  }

  .page-faq .faq-rail__link {
    white-space: normal;
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 9px 8px 9px 10px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--amber);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    background: rgba(28, 42, 51, 0.55);
  }

  .page-faq .faq-band__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 44px;
  }

  .page-faq .faq-item__q {
    font-size: 18px;
  }

  .page-faq .faq-answer {
    padding-left: 34px;
    max-width: 68ch;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-rail {
    width: var(--faq-rail-w);
  }
}

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