.page-faq {
  --faq-track: 248px;
  position: relative;
  overflow-x: clip;
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-cn);
}

.page-faq .breadcrumb {
  padding-top: var(--step-3);
  font-size: 13px;
  color: var(--mist);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

.page-faq .breadcrumb-sep {
  margin: 0 8px;
  color: rgba(242, 239, 245, .3);
}

/* ---------- 标题区 ---------- */

.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--step-4);
  padding: var(--step-4) 0 var(--step-5);
  border-bottom: 1px solid var(--line);
}

@keyframes faq-rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@keyframes faq-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(75, 240, 214, .45); }
  50% { opacity: .5; box-shadow: 0 0 0 6px rgba(75, 240, 214, 0); }
}

.page-faq .faq-hero__text {
  display: flex;
  flex-direction: column;
  gap: var(--step-3);
  animation: faq-rise .5s ease both;
}

.page-faq .faq-hero__text .eyebrow {
  color: var(--red-bright);
  letter-spacing: .18em;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 48ch;
  color: var(--mist);
}

.page-faq .faq-hero__meta {
  margin: 0;
  padding-top: var(--step-2);
  border-top: 1px solid var(--line-soft);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-hero__meta::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--cyan);
  vertical-align: middle;
  animation: faq-pulse 2.4s ease-in-out infinite;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(135deg, var(--red-glass), var(--midnight));
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.5) contrast(1.1);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--step-5);
  padding: var(--step-5) 0;
  border-bottom: 1px solid var(--line);
}

/* ---------- 左侧索引轨道 ---------- */

.page-faq .faq-track {
  display: grid;
  gap: 2px;
  align-content: start;
  border-left: 1px solid var(--line);
}

.page-faq .faq-track__item {
  display: flex;
  gap: 10px;
  align-items: baseline;
  margin-left: -1px;
  padding: 12px 14px;
  border-left: 2px solid transparent;
  color: var(--mist);
  text-decoration: none;
  transition: color .18s ease, background .18s ease, border-color .18s ease;
}

.page-faq .faq-track__item:hover {
  color: var(--bone);
  background: var(--glass);
  border-left-color: var(--red);
}

.page-faq .faq-track__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-track__no {
  flex: 0 0 24px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--red-bright);
}

.page-faq .faq-track__text {
  display: block;
  min-width: 0;
}

.page-faq .faq-track__label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq .faq-track__desc {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
  opacity: .75;
}

/* ---------- 右侧问答流 ---------- */

.page-faq .faq-stream {
  display: grid;
  gap: var(--step-4);
  min-width: 0;
}

.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--step-2);
  padding-bottom: var(--step-3);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-filters .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .chip {
  font-family: inherit;
  font-size: 13px;
  line-height: 1;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--mist);
  cursor: pointer;
  transition: color .18s ease, border-color .18s ease, background .18s ease;
}

.page-faq .chip:hover {
  color: var(--bone);
  border-color: var(--line-strong);
}

.page-faq .chip[aria-pressed="true"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(75, 240, 214, .08);
}

.page-faq .chip:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-filters__status {
  margin: 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .faq-list {
  display: grid;
  gap: var(--step-5);
}

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

.page-faq .faq-group:not(:has([data-filter-item]:not(.is-filtered-out))) {
  display: none;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: var(--step-2);
  padding-bottom: var(--step-3);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-group__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--red-bright);
}

.page-faq .faq-group__title {
  flex: 1 1 auto;
  margin: 0;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -.01em;
}

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

/* ---------- 折叠条目 ---------- */

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

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) 14px;
  gap: 16px;
  align-items: start;
  padding: var(--step-3) 16px;
  cursor: pointer;
  list-style: none;
  transition: background .18s ease, box-shadow .18s ease, padding-left .18s ease;
}

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

.page-faq .faq-item > summary:hover {
  background: var(--glass);
}

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

.page-faq .faq-item[open] > summary {
  background: var(--glass);
  box-shadow: inset 2px 0 0 var(--cyan);
  padding-left: var(--step-3);
}

.page-faq .faq-item__no {
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

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

.page-faq .faq-item__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--bone);
}

.page-faq .faq-item__icon {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--mist);
  transition: transform .18s ease, opacity .18s ease, background .18s ease;
}

.page-faq .faq-item__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-item__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__icon::before,
.page-faq .faq-item[open] .faq-item__icon::after {
  background: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 16px var(--step-4) 56px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 68ch;
}

/* ---------- 求助区 ---------- */

.page-faq .faq-help {
  position: relative;
  margin: var(--step-5) 0 var(--step-6);
  padding: var(--step-4) var(--step-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--teal);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--step-4);
  align-items: center;
}

.page-faq .faq-help__media {
  margin: 0;
  max-width: 240px;
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-help__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.4) contrast(1.15);
  opacity: .85;
}

.page-faq .faq-help__text .eyebrow {
  color: var(--amber);
  letter-spacing: .16em;
}

.page-faq .faq-help h2 {
  margin: var(--step-2) 0 var(--step-3);
}

.page-faq .faq-help__text > p {
  margin: 0 0 var(--step-3);
  max-width: 58ch;
  color: rgba(242, 239, 245, .78);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0 0 var(--step-4);
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}

.page-faq .faq-help__label {
  flex: 0 0 56px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-help__value {
  color: var(--bone);
  word-break: break-word;
}

.page-faq .copy-btn {
  font-family: inherit;
  font-size: 12px;
  line-height: 1;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  transition: border-color .18s ease, background .18s ease;
}

.page-faq .copy-btn:hover {
  border-color: var(--cyan);
  background: rgba(75, 240, 214, .08);
}

.page-faq .copy-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .copy-hint {
  font-size: 12px;
  color: var(--cyan);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--step-2);
  margin-bottom: var(--step-3);
}

.page-faq .faq-help__note {
  margin: 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--step-5);
    align-items: end;
    padding-top: var(--step-5);
  }

  .page-faq .faq-help {
    padding: var(--step-6);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: var(--step-5);
  }

  .page-faq .faq-help__media {
    max-width: 100%;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-track) minmax(0, 1fr);
    gap: var(--step-5);
    align-items: start;
  }

  .page-faq .faq-track {
    position: sticky;
    top: 88px;
  }
}

@media (max-width: 599px) {
  .page-faq .faq-item > summary {
    grid-template-columns: 20px minmax(0, 1fr) 14px;
    gap: 10px;
    padding: 18px 8px;
  }

  .page-faq .faq-item[open] > summary {
    padding-left: 12px;
  }

  .page-faq .faq-item__a {
    padding: 0 8px var(--step-3) 30px;
    font-size: 14px;
  }

  .page-faq .faq-group__title {
    font-size: 18px;
  }

  .page-faq .faq-filters .filter-bar {
    gap: 6px;
  }

  .page-faq .chip {
    padding: 7px 12px;
    font-size: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__text {
    animation: none;
  }

  .page-faq .faq-hero__meta::before {
    animation: none;
  }

  .page-faq .faq-item > summary,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-track__item,
  .page-faq .chip,
  .page-faq .copy-btn {
    transition: none;
  }
}