.page-faq {
  --faq-rail: 260px;
  --faq-sticky-top: 118px;
}

/* 面包屑与首屏 */
.page-faq .faq-hero {
  padding-top: clamp(22px, 3.6vw, 44px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
}

.page-faq .faq-hero__text .section-kicker {
  color: var(--lime);
}

.page-faq .faq-hero__text h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(30px, 6.6vw, 62px);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-faq .faq-hero__text .lede {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 60ch;
  color: var(--text);
}

.page-faq .faq-hero__text .index-note {
  margin: 18px 0 0;
  color: var(--mist);
}

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

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

.page-faq .media-frame .media-caption {
  color: var(--mist);
}

@media (min-width: 880px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-hero__media {
    grid-column: 1;
    grid-row: 1;
  }

  .page-faq .faq-hero__text {
    grid-column: 2;
    grid-row: 1;
  }
}

/* 索引 + 问答 双栏骨架 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  margin-top: clamp(44px, 7vw, 84px);
}

.page-faq .faq-index {
  border-top: 2px solid var(--line);
  padding-top: 14px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  max-height: 246px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 7px 8px 7px 7px;
  border-left: 2px solid transparent;
  color: var(--text);
  font-size: 13px;
  line-height: 1.5;
  text-decoration: none;
  transition: color var(--t), border-color var(--t), background-color var(--t);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color var(--t);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--lime);
  border-left-color: var(--lime);
  background-color: rgba(200, 255, 77, 0.08);
  outline: none;
}

.page-faq .faq-index__link:hover .faq-index__num,
.page-faq .faq-index__link:focus-visible .faq-index__num {
  color: var(--lime);
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 76px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
  }

  .page-faq .faq-index__list {
    max-height: calc(100vh - 220px);
  }
}

/* 分组 */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(52px, 8vw, 92px);
}

.page-faq .faq-group .section-head {
  margin-bottom: clamp(12px, 2vw, 20px);
}

.page-faq .faq-group .section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.22;
  color: var(--paper);
}

.page-faq .faq-group .section-kicker {
  color: var(--lime);
}

/* 手风琴 */
.page-faq .faq-item {
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 130px;
}

.page-faq .faq-item:first-of-type {
  border-top: 0;
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 26px;
  gap: 12px;
  align-items: start;
  padding: clamp(16px, 2.6vw, 26px) 0;
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-faq .faq-item__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  padding-top: 7px;
  transition: color var(--t);
}

.page-faq .faq-item__text {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(19px, 2.7vw, 26px);
  line-height: 1.34;
  letter-spacing: 0.01em;
  color: var(--paper);
  transition: color var(--t);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 6px;
  border: 2px solid var(--mist);
  transition: border-color var(--t);
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background-color: var(--mist);
  transition: transform var(--t), background-color var(--t), opacity var(--t);
}

.page-faq .faq-item__mark::before {
  left: 50%;
  top: 4px;
  bottom: 4px;
  width: 2px;
  transform: translateX(-50%);
}

.page-faq .faq-item__mark::after {
  top: 50%;
  left: 4px;
  right: 4px;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item > summary:hover .faq-item__text,
.page-faq .faq-item[open] > summary .faq-item__no {
  color: var(--lime);
}

.page-faq .faq-item[open] > summary .faq-item__mark {
  border-color: var(--lime);
}

.page-faq .faq-item[open] .faq-item__mark::before,
.page-faq .faq-item[open] .faq-item__mark::after {
  background-color: var(--lime);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  opacity: 0;
}

.page-faq .faq-item:target {
  outline: 2px solid var(--lime);
  outline-offset: 6px;
}

/* 答案区：米白纸面 */
.page-faq .faq-item__a {
  margin: 0 0 clamp(10px, 1.6vw, 18px);
  padding: clamp(20px, 3vw, 32px) clamp(18px, 3.4vw, 36px) clamp(22px, 3.4vw, 34px);
  background-color: var(--paper);
  color: var(--noir);
  border-top: 2px solid var(--noir);
}

.page-faq .faq-item__a > p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
}

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

.page-faq .faq-item__a strong {
  font-weight: 600;
  color: var(--noir);
}

.page-faq .faq-item__a a {
  color: var(--rust);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 6px 18px;
  max-width: 66ch;
}

.page-faq .faq-list li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 14px;
  position: relative;
  color: var(--noir);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 7px;
  height: 7px;
  background-color: var(--rust);
}

.page-faq .faq-chip {
  display: inline-block;
  min-width: 62px;
  margin-right: 6px;
  padding: 1px 7px 2px;
  border: 2px solid var(--noir);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  text-align: center;
  color: var(--noir);
  background-color: transparent;
}

.page-faq .faq-chip--ok {
  background-color: var(--lime);
}

.page-faq .faq-chip--todo {
  background-color: var(--lava);
}

.page-faq .faq-chip--risk {
  background-color: var(--rust);
  color: var(--paper);
}

.page-faq .faq-top {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--rust);
  border-bottom: 1px solid currentColor;
}

/* 流程示意 */
.page-faq .faq-flow-wrap {
  margin: 0 0 clamp(20px, 3vw, 30px);
  padding: clamp(16px, 2.4vw, 26px);
  border: 2px solid var(--line);
  background-color: var(--ink-2);
}

.page-faq .faq-flow-scroll {
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-faq .faq-flow {
  display: block;
  width: 100%;
  min-width: 460px;
  height: auto;
}

.page-faq .faq-flow-wrap .index-note {
  display: block;
  margin: 14px 0 0;
  color: var(--mist);
}

/* 尾部帮助区 */
.page-faq .faq-help {
  margin-top: clamp(64px, 10vw, 116px);
  padding: clamp(40px, 6vw, 76px) 0;
  border-top: 3px solid var(--lime);
  background-color: var(--ink-2);
}

.page-faq .faq-help .section-kicker {
  color: var(--lime);
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.14;
  color: var(--paper);
}

.page-faq .faq-help__text {
  margin: clamp(14px, 2.2vw, 22px) 0 0;
  max-width: 62ch;
  color: var(--text);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

@media (max-width: 520px) {
  .page-faq .faq-index__list {
    max-height: 208px;
  }

  .page-faq .faq-item > summary {
    grid-template-columns: 30px minmax(0, 1fr) 22px;
    gap: 10px;
  }

  .page-faq .faq-item__mark {
    width: 18px;
    height: 18px;
    margin-top: 5px;
  }

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

  .page-faq .faq-help__actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__no,
  .page-faq .faq-item__text,
  .page-faq .faq-item__mark,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>