.page-faq {
  --faq-index-w: 252px;
  --faq-line: rgba(168, 230, 207, 0.14);
  --faq-panel: rgba(14, 36, 64, 0.66);
  --faq-glow: rgba(255, 140, 66, 0.2);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(6px, 2vw, 18px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -200px;
  left: -140px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, var(--faq-glow), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -160px;
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(58, 175, 169, 0.16), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 6.2vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 14px 0 0;
  max-width: 22ch;
}

.page-faq .faq-hero__lede {
  margin-top: 20px;
  max-width: 62ch;
  color: var(--fg-muted);
  font-size: clamp(0.95rem, 2.4vw, 1.05rem);
  line-height: 1.8;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-faq .faq-hero__media {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero__frame {
  aspect-ratio: 3 / 1;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-faq .faq-hero__frame .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 筛选栏 ---------- */
.page-faq .faq-body {
  position: relative;
}

.page-faq .faq-filter {
  display: flex;
  gap: 8px;
  align-items: center;
  overflow-x: auto;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--faq-line);
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.page-faq .faq-filter::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-filter .filter-btn {
  flex: none;
  white-space: nowrap;
}

.page-faq .faq-filter .filter-btn[aria-pressed="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--ink-deep);
}

.page-faq .faq-filter .filter-count {
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--fg-dim);
  white-space: nowrap;
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(24px, 3.5vw, 40px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  background: var(--faq-panel);
  padding: 20px 18px;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0 0 14px;
}

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

.page-faq .faq-index__item {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 6px;
  border-bottom: 1px solid rgba(168, 230, 207, 0.08);
}

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

.page-faq .faq-index__no {
  font-size: 0.7rem;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-faq .faq-index__name {
  font-size: 0.9rem;
  color: var(--fg);
}

.page-faq .faq-index__num {
  font-size: 0.72rem;
  color: var(--jade);
}

.page-faq .faq-index__status {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-index__dot {
  flex: none;
  width: 7px;
  height: 7px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 10px rgba(58, 175, 169, 0.7);
}

.page-faq .faq-index__status p {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--fg-dim);
}

.page-faq .faq-index__status strong {
  color: var(--gold);
  font-weight: 500;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  min-width: 0;
  border-top: 1px solid var(--faq-line);
}

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

.page-faq .faq-item.is-filtered-out {
  display: none;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: 14px;
  align-items: start;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
  transition: color var(--speed);
}

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

.page-faq .faq-q:focus-visible {
  outline: 1px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .faq-q__no {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--jade);
  padding-top: 3px;
}

.page-faq .faq-q__text {
  font-size: clamp(0.98rem, 2.6vw, 1.08rem);
  font-weight: 500;
  line-height: 1.55;
  color: var(--fg);
  transition: color var(--speed);
}

.page-faq .faq-item[open] .faq-q__text {
  color: var(--amber);
}

.page-faq .faq-item:hover .faq-q__text {
  color: var(--gold);
}

.page-faq .faq-q__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  flex: none;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--amber);
  transition: transform var(--speed), background var(--speed);
}

.page-faq .faq-q__mark::before {
  width: 14px;
  height: 1px;
}

.page-faq .faq-q__mark::after {
  width: 1px;
  height: 14px;
}

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

.page-faq .faq-item[open] .faq-q__mark::before {
  background: var(--jade);
}

.page-faq .faq-a {
  padding: 0 8px 24px 46px;
  max-width: 64ch;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--fg-muted);
}

/* ---------- 换设备流程 ---------- */
.page-faq .faq-signin {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  border-top: 1px solid var(--faq-line);
  padding-top: clamp(28px, 4vw, 48px);
}

.page-faq .faq-signin__media {
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.page-faq .faq-signin__media .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-signin__body .section-title {
  margin: 12px 0 0;
}

.page-faq .faq-signin__body > p {
  margin: 16px 0 0;
  color: var(--fg-muted);
  font-size: 0.94rem;
  line-height: 1.85;
  max-width: 56ch;
}

.page-faq .faq-signin__steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-signin__steps li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 16px;
  border: 1px solid var(--faq-line);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius);
  background: rgba(31, 58, 95, 0.22);
}

.page-faq .faq-signin__num {
  font-size: 0.82rem;
  color: var(--gold);
  letter-spacing: 0.08em;
}

.page-faq .faq-signin__text {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--fg);
}

.page-faq .faq-signin__note {
  margin-top: 22px;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--fg-dim);
}

.page-faq .faq-signin__note a {
  color: var(--jade);
  text-decoration: none;
  border-bottom: 1px solid rgba(58, 175, 169, 0.4);
  transition: color var(--speed), border-color var(--speed);
}

.page-faq .faq-signin__note a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support__card {
  padding: clamp(24px, 4vw, 44px);
  background: rgba(14, 36, 64, 0.6);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-lg);
}

.page-faq .faq-support__card .section-title {
  margin: 12px 0 0;
}

.page-faq .faq-support__lede {
  margin: 16px 0 0;
  max-width: 58ch;
  color: var(--fg-muted);
  font-size: 0.94rem;
  line-height: 1.85;
}

.page-faq .faq-contact {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-contact__key {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--jade);
}

.page-faq .faq-contact__val {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--fg);
  word-break: break-word;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-contact__row {
    grid-template-columns: 96px 1fr;
    gap: 16px;
    align-items: baseline;
  }

  .page-faq .faq-signin {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-faq .faq-q {
    padding: 24px 6px;
  }

  .page-faq .faq-a {
    padding: 0 12px 28px 52px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero__frame {
    aspect-ratio: 16 / 9;
  }

  .page-faq .faq-q {
    grid-template-columns: 26px 1fr auto;
    gap: 10px;
  }

  .page-faq .faq-a {
    padding-left: 36px;
  }

  .page-faq .faq-signin__steps li {
    grid-template-columns: 32px 1fr;
    gap: 10px;
    padding: 12px;
  }
}
<<<END>>>