.page-faq {
  --faq-rail-w: 176px;
}

/* 顶部标题区 */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(24px, 5vw, 52px) clamp(32px, 6vw, 72px);
}

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

.page-faq .faq-hero__text > * + * {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-faq .faq-hero__text .mono-index {
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 5.4vw, 56px);
  line-height: 1.14;
  letter-spacing: 0.04em;
  color: var(--ink);
  max-width: 13em;
}

.page-faq .faq-hero__text .lede {
  margin-top: clamp(14px, 2vw, 20px);
  max-width: 36ch;
  color: var(--ink-soft);
}

.page-faq .faq-hero__hint {
  margin-top: clamp(14px, 2vw, 20px);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-hero__hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

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

.page-faq .faq-hero__media {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__media .media-frame {
  background: var(--grad-media);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-faq .faq-hero__media .media-frame__caption {
  color: var(--mist);
  margin-top: 10px;
}

/* 索引区 */
.page-faq .faq-index {
  background: var(--grad-stand);
  border-block: 1px solid var(--line-soft);
}

.page-faq .faq-index__head {
  max-width: 48ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-index__head .mono-index {
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-index__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(23px, 3.4vw, 34px);
  letter-spacing: 0.04em;
  line-height: 1.25;
  color: var(--ink);
}

.page-faq .faq-index__lede {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .index-band {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(12px, 2.4vw, 28px);
  padding: clamp(14px, 2vw, 20px) clamp(2px, 1.2vw, 14px);
  border-bottom: 1px solid var(--line-soft);
  text-decoration: none;
  color: var(--ink);
  transition: background-color 0.28s var(--ease);
}

.page-faq .index-band:hover,
.page-faq .index-band:focus-visible {
  background: var(--cyan-a08);
}

.page-faq .index-band__num {
  color: var(--cyan);
  white-space: nowrap;
}

.page-faq .index-band__body {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  min-width: 0;
}

.page-faq .index-band__title {
  font-weight: 700;
  font-size: clamp(16px, 2vw, 20px);
  letter-spacing: 0.02em;
  line-height: 1.45;
}

.page-faq .index-band__meta {
  color: var(--mist);
}

.page-faq .index-band__go {
  flex: none;
  color: var(--line);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.page-faq .index-band:hover .index-band__go,
.page-faq .index-band:focus-visible .index-band__go {
  transform: translateX(5px);
  color: var(--cyan);
}

/* 索引栏 + 问答组 */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding-block: clamp(36px, 6vw, 80px) clamp(48px, 7vw, 96px);
}

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

.page-faq .rail-label {
  color: var(--mist);
  margin: 0 0 14px;
}

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

.page-faq .rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px 9px 13px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--mist);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .rail-link .mono-index {
  font-size: 11px;
  color: inherit;
  opacity: 0.72;
}

.page-faq .rail-link:hover {
  color: var(--mint);
  background: var(--cyan-a08);
}

.page-faq .rail-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--cyan-a08);
}

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

/* 分组 */
.page-faq .faq-group {
  padding-block: clamp(28px, 4.5vw, 52px);
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px clamp(12px, 2vw, 20px);
  align-items: baseline;
  margin-bottom: clamp(12px, 2vw, 20px);
}

.page-faq .group-num {
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1;
  letter-spacing: 0;
  color: var(--cyan);
  opacity: 0.82;
}

.page-faq .group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 3vw, 30px);
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .group-lede {
  grid-column: 1 / -1;
  margin: 8px 0 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* 问答条目 */
.page-faq .qa-list {
  min-width: 0;
}

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

.page-faq .qa:last-child {
  border-bottom: 0;
}

.page-faq .qa summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(10px, 1.8vw, 18px);
  padding: 16px 4px 16px 0;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa-num {
  color: var(--mist);
  white-space: nowrap;
}

.page-faq .qa-q {
  min-width: 0;
  font-size: clamp(16px, 1.9vw, 18px);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--ink);
  transition: color 0.24s var(--ease);
}

.page-faq .qa summary:hover .qa-q,
.page-faq .qa summary:focus-visible .qa-q {
  color: var(--mint);
}

.page-faq .qa-icon {
  flex: none;
  color: var(--mist);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease);
}

.page-faq .qa[open] .qa-icon {
  transform: rotate(180deg);
  color: var(--cyan);
}

.page-faq .qa-answer {
  padding: 0 0 clamp(16px, 2.4vw, 24px);
}

.page-faq .qa-answer p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .qa-answer p + p {
  margin-top: 10px;
}

.page-faq .qa-answer a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-answer a:hover {
  color: var(--mint);
  border-bottom-color: var(--cyan);
}

.page-faq .qa[open] > .qa-answer {
  animation: faq-open 0.32s var(--ease) both;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* 中段通栏图 */
.page-faq .faq-plate {
  margin: 0;
  padding-block: clamp(20px, 3.4vw, 36px);
}

.page-faq .faq-plate .media-frame {
  background: var(--grad-media);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-faq .faq-plate .media-frame__caption {
  margin-top: 10px;
  color: var(--mist);
}

/* 收尾 */
.page-faq .faq-cta {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--grad-panel);
}

.page-faq .faq-cta .mono-index {
  color: var(--coral);
  margin: 0;
}

.page-faq .faq-cta__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 2.8vw, 27px);
  letter-spacing: 0.04em;
  line-height: 1.35;
  color: var(--ink);
}

.page-faq .faq-cta__text {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 26px);
}

/* 平板以上 */
@media (min-width: 640px) {
  .page-faq .faq-hero__media .media-frame {
    aspect-ratio: 3 / 2;
  }

  .page-faq .faq-hero__media img {
    height: 100%;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-faq .faq-hero__text {
    padding-bottom: 8px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

  .page-faq .faq-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .qa summary {
    padding: 18px 4px 18px 0;
  }
}

@media (min-width: 1200px) {
  .page-faq .index-band {
    grid-template-columns: 3.4rem minmax(0, 1fr) auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa[open] > .qa-answer {
    animation: none;
  }

  .page-faq .index-band__go,
  .page-faq .qa-icon,
  .page-faq .rail-link {
    transition: none;
  }
}
<<<END>>>