.page-faq {
  --faq-cut: 14px;
  --faq-rail-top: 104px;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
}

/* 面包屑呼吸位 */
.page-faq .breadcrumbs {
  padding: 18px 0 0;
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(26px, 4vw, 40px);
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  background-position: center top;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(247, 250, 252, 0) 38%, var(--paper) 100%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 4vw, 40px);
  align-items: end;
}

.page-faq .faq-hero .eyebrow {
  margin: 0 0 8px;
  letter-spacing: .14em;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--indigo);
  max-width: 16em;
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--grad-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

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

/* 类别筛选条 */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 18px 0 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-filter__label {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .faq-filter__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-filter__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  font-size: 13.5px;
  color: var(--indigo);
  text-decoration: none;
  background: var(--sky);
  border: 1px solid transparent;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  transition: background .22s var(--ease), color .22s var(--ease);
}

.page-faq .faq-filter__link:hover,
.page-faq .faq-filter__link:focus-visible {
  background: var(--sand);
  color: var(--coral-ink);
}

.page-faq .faq-filter__no {
  font-size: 11px;
  color: var(--steel);
}

.page-faq .faq-filter__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--indigo);
  background: rgba(255, 255, 255, .7);
  border-radius: 999px;
  padding: 1px 7px;
}

/* 主体两栏 */
.page-faq .faq-main {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  padding: clamp(26px, 4vw, 46px) 0 clamp(34px, 5vw, 60px);
}

.page-faq .faq-rail__inner {
  padding-left: 16px;
  border-left: 2px solid var(--line-strong);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 12px;
  font-size: 13.5px;
  color: var(--steel);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--line);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-rail__link .mono {
  font-size: 11.5px;
  color: inherit;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--indigo);
  border-color: var(--line-strong);
}

.page-faq .faq-rail__link[data-active="true"] {
  color: var(--indigo);
  font-weight: 700;
  background: var(--sand);
  border-color: var(--line-strong);
}

.page-faq .faq-rail__hint {
  display: none;
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--indigo);
}

.page-faq .faq-group__index {
  font-size: 12.5px;
  color: var(--coral-ink);
  letter-spacing: .08em;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 30px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--indigo);
}

.page-faq .faq-group__lead {
  margin: 14px 0 6px;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--steel);
}

/* 手风琴条目 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: background .24s var(--ease);
}

.page-faq .faq-item[open] {
  background: linear-gradient(to right, var(--sky), rgba(221, 246, 247, 0));
  border-bottom-color: var(--line-strong);
}

.page-faq .faq-item__summary {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: start;
  padding: 15px 10px 15px 4px;
  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: 2px;
}

.page-faq .faq-item__num {
  padding-top: 4px;
  font-size: 12.5px;
  color: var(--coral-ink);
  letter-spacing: .04em;
}

.page-faq .faq-item__q {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15.5px, 2.2vw, 17.5px);
  line-height: 1.6;
  color: var(--indigo);
  overflow-wrap: break-word;
}

.page-faq .faq-item__icon {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 7px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .faq-item__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

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

.page-faq .faq-item__body {
  padding: 0 10px 18px 48px;
}

.page-faq .faq-item__body p {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink);
}

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

.page-faq .faq-item__body a {
  color: var(--coral-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__body a:hover {
  color: var(--indigo);
}

.page-faq .faq-item__path {
  display: inline-block;
  padding: 6px 12px;
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: .02em;
  color: var(--indigo);
  background: var(--sand);
  border-left: 3px solid var(--coral);
}

/* 收藏组插图 */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-top: 18px;
  border-top: 1px dashed var(--line-strong);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--grad-soft);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* 更新说明带 */
.page-faq .faq-brief {
  background: var(--sand);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(30px, 5vw, 54px) 0;
}

.page-faq .faq-brief__inner {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-faq .faq-brief__index {
  margin: 0 0 10px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--coral-ink);
  text-transform: uppercase;
}

.page-faq .faq-brief__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--indigo);
}

.page-faq .faq-brief__lead {
  margin: 12px 0 0;
  max-width: 30em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-brief__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-brief__list li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  padding: 11px 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
  border-top: 1px solid rgba(31, 58, 138, .14);
}

.page-faq .faq-brief__list li:last-child {
  border-bottom: 1px solid rgba(31, 58, 138, .14);
}

.page-faq .faq-brief__list .mono {
  font-size: 12px;
  color: var(--steel);
  padding-top: 2px;
}

.page-faq .faq-brief__body .btn {
  margin-top: 18px;
}

/* 联系引导 */
.page-faq .faq-help {
  padding: clamp(30px, 5vw, 58px) 0 clamp(38px, 6vw, 76px);
}

.page-faq .faq-help__panel {
  display: grid;
  gap: 16px;
  padding: clamp(20px, 4vw, 38px);
  background: var(--sky);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-help__index {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3.2vw, 30px);
  line-height: 1.3;
  color: var(--indigo);
}

.page-faq .faq-help__lead {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--ink);
}

.page-faq .faq-help__list {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-help__row {
  display: grid;
  gap: 2px;
  padding: 12px 0;
  border-top: 1px solid rgba(31, 58, 138, .14);
}

.page-faq .faq-help__row dt {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-faq .faq-help__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: break-word;
}

.page-faq .faq-help__row dd.mono {
  color: var(--indigo);
  letter-spacing: .01em;
}

.page-faq .faq-help__panel .btn {
  justify-self: start;
}

/* 平板及以上 */
@media (min-width: 760px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-brief__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-help__row {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }

  .page-faq .faq-help__panel {
    padding: clamp(24px, 4vw, 40px) clamp(24px, 4vw, 48px);
  }
}

/* 桌面：左侧粘性索引 */
@media (min-width: 960px) {
  .page-faq .faq-main {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: var(--faq-rail-top);
    padding-left: 18px;
  }

  .page-faq .faq-rail__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail__link {
    position: relative;
    padding: 9px 10px 9px 14px;
    border: 1px solid transparent;
    border-radius: 0;
    clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  }

  .page-faq .faq-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 0;
    height: 0;
    transform: translateY(-50%);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 6px solid var(--coral);
    opacity: 0;
    transition: opacity .2s var(--ease);
  }

  .page-faq .faq-rail__link[data-active="true"]::before {
    opacity: 1;
  }

  .page-faq .faq-rail__link:hover {
    background: var(--sky);
  }

  .page-faq .faq-rail__hint {
    display: block;
  }

  .page-faq .faq-item__summary {
    grid-template-columns: 40px minmax(0, 1fr) 16px;
    gap: 14px;
    padding: 17px 14px 17px 10px;
  }

  .page-faq .faq-item__body {
    padding: 0 18px 20px 60px;
  }
}

/* 窄屏收口 */
@media (max-width: 480px) {
  .page-faq .faq-hero__actions .btn {
    width: 100%;
    text-align: center;
  }

  .page-faq .faq-filter {
    gap: 8px;
  }

  .page-faq .faq-filter__label {
    width: 100%;
  }

  .page-faq .faq-item__summary {
    grid-template-columns: 26px minmax(0, 1fr) 14px;
    gap: 8px;
  }

  .page-faq .faq-item__body {
    padding: 0 6px 16px 34px;
  }

  .page-faq .faq-brief__list li {
    grid-template-columns: 24px minmax(0, 1fr);
  }
}

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