.page-faq {
  --faq-gap: clamp(24px, 4vw, 52px);
  --faq-answer-pad: 0px;
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(44px, 7vw, 92px);
}

.page-faq .breadcrumb {
  padding-top: clamp(14px, 3vw, 26px);
}

/* 顶部索引台 */
.page-faq .faq-desk {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding-top: clamp(18px, 3vw, 34px);
}

.page-faq .faq-desk__head h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-faq .faq-desk__lead {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-desk__figure {
  margin: 0;
  align-self: start;
}

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

.page-faq .media-frame__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist-dim);
  letter-spacing: 0.02em;
}

/* 快捷入口 */
.page-faq .quick-entry {
  display: grid;
  gap: 1px;
  margin-top: clamp(22px, 3.5vw, 32px);
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-faq .quick-entry__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "idx label"
    "idx meta";
  column-gap: 14px;
  align-items: center;
  padding: 14px 16px;
  background: var(--panel);
  color: var(--paper);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .quick-entry__item:hover,
.page-faq .quick-entry__item:focus-visible {
  background: var(--pitch);
}

.page-faq .quick-entry__idx {
  grid-area: idx;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-faq .quick-entry__label {
  grid-area: label;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-faq .quick-entry__meta {
  grid-area: meta;
  font-size: 12px;
  color: var(--mist);
}

.page-faq .quick-entry__item:hover .quick-entry__meta,
.page-faq .quick-entry__item:hover .quick-entry__idx {
  color: var(--paper);
}

/* 主体：分类栏 + 问题列表 */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(32px, 5.5vw, 68px);
}

.page-faq .faq-rail {
  border-top: 1px solid var(--rule);
  padding-top: 16px;
}

.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.page-faq .faq-filter__btn {
  appearance: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 13px;
  font: inherit;
  font-size: 14px;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--rule);
  border-left: 2px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease),
    border-color var(--dur-fast) var(--ease);
}

.page-faq .faq-filter__btn .mono {
  font-size: 12px;
  color: var(--mist-dim);
}

.page-faq .faq-filter__btn:hover {
  color: var(--paper);
  border-color: var(--signal);
}

.page-faq .faq-filter__btn[aria-pressed="true"] {
  color: var(--amber);
  background: var(--panel);
  border-color: var(--rule);
  border-left-color: var(--amber);
}

.page-faq .faq-filter__btn[aria-pressed="true"] .mono {
  color: var(--amber);
}

.page-faq .faq-rail__note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist-dim);
}

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

/* 问题分组 */
.page-faq .faq-block + .faq-block {
  margin-top: clamp(34px, 5vw, 60px);
}

.page-faq .faq-block[hidden] {
  display: none;
}

.page-faq .faq-block__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  row-gap: 6px;
  align-items: baseline;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-block__head h2 {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 28px);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-block__intro {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-block__figure {
  margin: 18px 0 4px;
}

/* 问题手风琴 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__no {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist-dim);
  padding-top: 4px;
}

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--paper);
  transition: color var(--dur-fast) var(--ease);
}

.page-faq .faq-item summary:hover .faq-item__q,
.page-faq .faq-item[open] .faq-item__q {
  color: var(--amber);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--signal);
  transition: transform var(--dur) var(--ease);
}

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

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

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

.page-faq .faq-item__a {
  padding: 0 2px 20px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-item__a strong.mono,
.page-faq .faq-item__a .mono {
  color: var(--amber);
  font-weight: 500;
  word-break: break-word;
}

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

/* 联系方式键值 */
.page-faq .faq-facts {
  display: grid;
  gap: 1px;
  margin: 22px 0 0;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.page-faq .faq-fact {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  background: var(--panel);
}

.page-faq .faq-fact dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist-dim);
}

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

.page-faq .faq-fact dd.mono {
  color: var(--amber);
}

/* 收尾 */
.page-faq .faq-tail {
  margin-top: clamp(34px, 5vw, 60px);
  padding: 20px 0 0;
  border-top: 2px solid var(--pitch);
  display: grid;
  gap: 14px;
}

.page-faq .faq-tail__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-tail__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 中等宽度 */
@media (min-width: 600px) {
  .page-faq {
    --faq-answer-pad: 46px;
  }

  .page-faq .quick-entry {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .quick-entry__item {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "idx"
      "label"
      "meta";
    row-gap: 6px;
    align-items: start;
    padding: 16px;
  }

  .page-faq .quick-entry__idx {
    padding-bottom: 2px;
  }

  .page-faq .faq-item__a {
    padding-left: var(--faq-answer-pad);
  }

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

/* 桌面：左栏粘性分类 */
@media (min-width: 960px) {
  .page-faq .faq-desk {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-faq .faq-body {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h-compact) + 20px);
    padding-top: 0;
  }

  .page-faq .faq-filter {
    display: grid;
    gap: 0;
    margin-top: 14px;
  }

  .page-faq .faq-filter__btn {
    width: 100%;
    padding: 11px 12px;
    border: 0;
    border-bottom: 1px solid var(--rule);
    border-left: 2px solid transparent;
    background: transparent;
  }

  .page-faq .faq-filter__btn[aria-pressed="true"] {
    background: var(--panel);
    border-bottom-color: var(--rule);
    border-left-color: var(--amber);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .quick-entry__item,
  .page-faq .faq-filter__btn,
  .page-faq .faq-item__q,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}
<<<END>>>