.page-faq {
  --faq-line: #223c53;
  --faq-hair: rgba(44, 74, 102, .7);
  color: var(--frost);
  font-family: var(--font-body);
  padding: clamp(22px, 4vw, 44px) 0 clamp(64px, 9vw, 112px);
  background:
    radial-gradient(1100px 520px at 88% -12%, rgba(25, 211, 230, .10), transparent 62%),
    radial-gradient(820px 460px at -6% 24%, rgba(245, 169, 63, .06), transparent 60%);
}

.page-faq .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-faq .faq-hero {
  max-width: 880px;
  border-left: 1px solid var(--faq-line);
  padding-left: clamp(16px, 3vw, 26px);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 6.6vw, 58px);
  line-height: 1.02;
  letter-spacing: -.01em;
  margin: 12px 0 18px;
  color: var(--frost);
}

.page-faq .faq-lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--dim);
  margin: 0;
  max-width: 64ch;
}

.page-faq .faq-hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 24px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--faq-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dim);
}

.page-faq .faq-hero-meta .mono {
  color: var(--cyan);
  font-weight: 500;
}

/* 主体：左目录 + 右答案 */
.page-faq .faq-body {
  display: grid;
  gap: 30px;
  margin-top: clamp(34px, 5vw, 58px);
  min-width: 0;
}

.page-faq .faq-index {
  background: var(--deck);
  border: 1px solid var(--faq-line);
  border-radius: var(--r);
  padding: 18px 16px 20px;
}

.page-faq .faq-index .label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dim);
  text-transform: uppercase;
}

.page-faq .faq-index ol {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 10px;
  border-left: 2px solid transparent;
  color: var(--dim);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: color 120ms var(--ease), background 120ms var(--ease), border-color 120ms var(--ease);
}

.page-faq .faq-index a .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: .06em;
  flex: 0 0 auto;
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  color: var(--frost);
  background: rgba(25, 211, 230, .07);
}

.page-faq .faq-index a.is-active {
  color: var(--frost);
  border-left-color: var(--amber);
  background: rgba(25, 211, 230, .09);
}

.page-faq .faq-index-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dim);
}

.page-faq .faq-answers {
  display: grid;
  gap: clamp(42px, 6vw, 76px);
  min-width: 0;
}

/* 分组标题 */
.page-faq .faq-group {
  min-width: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--faq-line);
  margin: 0;
}

.page-faq .faq-group-head .chapter-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--amber);
  flex: 0 0 auto;
}

.page-faq .faq-group-head h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -.005em;
  margin: 0;
  color: var(--frost);
}

.page-faq .faq-group-lead {
  margin: 16px 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--dim);
  max-width: 58ch;
}

/* 折叠问答 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-item summary {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 32px 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: 1px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-qnum {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-faq .faq-qtext {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--frost);
}

.page-faq .faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 24px;
  width: 7px;
  height: 7px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: rotate(-45deg);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(45deg);
  border-right-color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-faq .faq-item[open] summary {
  padding-bottom: 10px;
}

.page-faq .faq-a {
  margin: 0 0 20px 34px;
  padding: 0 0 0 16px;
  border-left: 1px solid var(--faq-hair);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--dim);
}

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

.page-faq .faq-a .faq-key {
  position: relative;
  padding-left: 12px;
  color: var(--frost);
}

.page-faq .faq-a .faq-key::before {
  content: "";
  position: absolute;
  left: 0;
  top: .5em;
  width: 2px;
  height: 1.05em;
  background: var(--amber);
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 211, 230, .45);
}

.page-faq .faq-a a:hover {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

/* 图与版本对照 */
.page-faq .faq-figure {
  margin: 20px 0 24px;
  border: 1px solid var(--faq-line);
  background: var(--deck);
  border-radius: var(--r);
  overflow: hidden;
}

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

.page-faq .faq-figure--tall img {
  aspect-ratio: 3 / 4;
}

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

.page-faq .faq-figure figcaption {
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--dim);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-entry-media {
  display: grid;
  gap: 18px;
  margin-bottom: 8px;
}

.page-faq .faq-entry-media .faq-figure {
  margin: 0;
}

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

.page-faq .segmented.faq-switch {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 3px;
  padding: 3px;
  background: var(--hull);
  border: 1px solid var(--faq-line);
  border-radius: var(--r);
  margin-bottom: 14px;
}

.page-faq .faq-switch button {
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 0;
  border-radius: var(--r);
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 9px 13px;
  cursor: pointer;
  transition: background 140ms var(--ease), color 140ms var(--ease);
}

.page-faq .faq-switch button:hover {
  color: var(--frost);
}

.page-faq .faq-switch button[aria-selected="true"] {
  background: var(--cyan);
  color: var(--on-cyan);
}

.page-faq .faq-switch-panel {
  background: var(--deck);
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--r);
  padding: 16px 16px 18px;
}

.page-faq .faq-switch-panel + .faq-switch-panel {
  margin-top: 10px;
  border-left-color: var(--amber);
}

.page-faq .faq-switch-panel .label {
  display: block;
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--amber);
  text-transform: uppercase;
}

.page-faq .faq-switch-panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--dim);
}

/* 求助区 */
.page-faq .faq-help {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.page-faq .faq-help-card {
  background: var(--deck);
  border: 1px solid var(--faq-line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--r);
  padding: 20px 18px 22px;
}

.page-faq .faq-help-card:last-child {
  border-top-color: var(--amber);
}

.page-faq .faq-help-card .label {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--dim);
  text-transform: uppercase;
}

.page-faq .faq-help-card h3 {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 24px);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 12px;
  color: var(--frost);
}

.page-faq .faq-help-card p {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--dim);
}

.page-faq .faq-help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
}

.page-faq .faq-help-links a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(25, 211, 230, .45);
  padding-bottom: 2px;
}

.page-faq .faq-help-links a:hover {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

@media (min-width: 720px) {
  .page-faq .faq-entry-media {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    align-items: start;
    gap: 22px;
  }

  .page-faq .faq-switch-panel {
    padding: 18px 20px 20px;
  }

  .page-faq .faq-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-item summary {
    padding-right: 38px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 96px;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item summary::after,
  .page-faq .faq-index a,
  .page-faq .faq-switch button {
    transition: none;
  }
}
<<<END>>>