.page-faq {
  --faq-rail-w: 208px;
  --faq-line: var(--hairline);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 40px) 0 clamp(34px, 6vw, 60px);
  background:
    radial-gradient(120% 90% at 82% -12%, rgba(108, 75, 216, 0.3), transparent 62%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 82%);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(242, 236, 224, 0.035) 0 1px, transparent 1px 42px);
}

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

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--mute);
}

.page-faq .faq-tabs {
  display: flex;
  gap: 8px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-tabs::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tab {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex: 0 0 auto;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--faq-line);
  background: rgba(24, 34, 74, 0.55);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 240, 208, 0.1);
  outline: none;
}

.page-faq .faq-tab .num {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
  font-size: var(--fs-small);
  color: var(--mute);
}

.page-faq .faq-status__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-status__item .num {
  color: var(--paper);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(28px, 5vw, 56px);
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .faq-rail {
  display: none;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-faq .faq-rail__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-rail__link {
  display: block;
  padding: 11px 0 11px 16px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--mute);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--paper);
  outline: none;
}

.page-faq .faq-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 120px;
  padding-bottom: clamp(26px, 4vw, 44px);
  margin-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-main > .faq-section:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-section__head {
  max-width: 66ch;
}

.page-faq .faq-section__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-faq .faq-section__title {
  margin: 10px 0 0;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-section__lede {
  margin: 12px 0 0;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--mute);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 8px;
  border: 1px solid var(--faq-line);
  background: var(--ink-700);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-faq .faq-figure--3x2 img {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure .media-caption {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  font-size: 12px;
  line-height: 1.6;
  color: var(--mute);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  margin-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item__summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

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

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

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

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

.page-faq .faq-item[open] > .faq-item__body {
  padding-left: 12px;
  margin-left: 2px;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-answer {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
}

.page-faq .faq-steps {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 38px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mute);
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  padding: 1px 5px;
  border: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-faq .faq-item__more {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--mute);
}

.page-faq .faq-item__more a,
.page-faq .faq-answer a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-underline-offset: 4px;
}

/* ---------- 浅色章节 ---------- */
.page-faq .faq-paper {
  background: var(--paper);
  color: var(--paper-ink);
  padding: clamp(24px, 4vw, 40px) clamp(18px, 3vw, 32px);
  border: 1px solid rgba(22, 27, 46, 0.12);
}

.page-faq .faq-paper .faq-section__index {
  color: var(--ink-700);
}

.page-faq .faq-paper .faq-section__title {
  color: var(--paper-ink);
}

.page-faq .faq-paper .faq-section__lede,
.page-faq .faq-paper .faq-answer,
.page-faq .faq-paper .faq-steps li,
.page-faq .faq-paper .faq-item__more {
  color: rgba(22, 27, 46, 0.74);
}

.page-faq .faq-paper .faq-list,
.page-faq .faq-paper .faq-item {
  border-color: rgba(22, 27, 46, 0.18);
}

.page-faq .faq-paper .faq-item__q {
  color: var(--paper-ink);
}

.page-faq .faq-paper .faq-item__mark::before,
.page-faq .faq-paper .faq-item__mark::after {
  background: var(--ink-700);
}

.page-faq .faq-paper .faq-item[open] > .faq-item__body {
  border-left-color: var(--ink-700);
}

.page-faq .faq-paper .faq-steps li::before {
  border-color: rgba(22, 27, 46, 0.22);
  color: var(--ink-700);
}

.page-faq .faq-paper .faq-item__more a,
.page-faq .faq-paper .faq-answer a {
  color: var(--ink-700);
  text-decoration-color: var(--ink-700);
}

.page-faq .faq-paper .faq-item__summary:focus-visible {
  outline-color: var(--ink-700);
}

/* ---------- 反馈模板 ---------- */
.page-faq .faq-snippet {
  margin-top: 22px;
  border: 1px solid var(--faq-line);
  background: var(--ink-800);
}

.page-faq .faq-snippet__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
  padding: 9px 14px;
  border-bottom: 1px solid var(--faq-line);
  font-size: 12px;
  color: var(--mute);
}

.page-faq .faq-snippet__bar .num {
  color: var(--cyan);
  letter-spacing: 0.12em;
}

.page-faq .faq-snippet pre {
  margin: 0;
  padding: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--paper);
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 108px;
  }

  .page-faq .faq-figure {
    margin-top: 26px;
  }

  .page-faq .faq-item[open] > .faq-item__body {
    padding-left: 18px;
    margin-left: 4px;
  }
}

@media (min-width: 1120px) {
  .page-faq .faq-hero__lede {
    font-size: 18px;
  }

  .page-faq .faq-item__q {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-tab,
  .page-faq .faq-rail__link {
    transition: none;
  }
}
<<<END>>>