.page-faq {
  --faq-rail: 236px;
  padding-top: var(--header-offset);
  background: var(--ink);
  overflow-x: hidden;
}

.page-faq h1,
.page-faq h2,
.page-faq p,
.page-faq li,
.page-faq a {
  overflow-wrap: break-word;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  padding: 2rem 0 2.1rem;
  border-bottom: 3px solid var(--line);
  background:
    radial-gradient(115% 85% at 100% 0%, rgba(43, 245, 196, 0.11), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, var(--carbon) 100%);
}

.page-faq .faq-hero__tag {
  display: inline-flex;
  align-items: center;
  margin: 1.15rem 0 0.9rem;
  padding: 0.34rem 0.72rem;
  border: 2px solid var(--neon);
  color: var(--neon);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-faq .faq-hero h1 {
  margin: 0;
  max-width: 26ch;
  color: var(--paper);
  font-size: var(--fs-h1);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
}

.page-faq .faq-hero__lead {
  margin: 1rem 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-faq .faq-route {
  display: flex;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  border: 2px solid var(--line);
  background: rgba(16, 20, 23, 0.72);
  scrollbar-width: thin;
}

.page-faq .faq-route__link {
  flex: 1 0 auto;
  min-width: 152px;
  display: grid;
  gap: 0.28rem;
  padding: 0.82rem 1rem;
  border-right: 2px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-route__link:last-child {
  border-right: 0;
}

.page-faq .faq-route__link:hover {
  background: var(--panel);
  color: var(--neon);
}

.page-faq .faq-route__idx {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-faq .faq-route__label {
  font-size: 0.86rem;
  font-weight: 700;
}

/* ============ 主体 ============ */
.page-faq .faq-body {
  padding: 2.4rem 0 3.4rem;
}

.page-faq .faq-layout {
  display: grid;
  gap: 1.9rem;
}

.page-faq .faq-flow {
  min-width: 0;
}

/* 左侧索引 */
.page-faq .faq-rail {
  border: 2px solid var(--line);
  background: var(--carbon);
}

.page-faq .faq-rail__head {
  margin: 0;
  padding: 0.72rem 0.9rem;
  border-bottom: 2px solid var(--line);
  color: var(--mist);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

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

.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  padding: 0.74rem 0.9rem;
  border-bottom: 1px solid var(--line);
  color: var(--paper);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-rail__list li:last-child .faq-rail__link {
  border-bottom: 0;
}

.page-faq .faq-rail__link:hover {
  background: var(--panel);
  color: var(--neon);
}

.page-faq .faq-rail__idx {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--mist);
}

.page-faq .faq-rail__count {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--amber);
}

/* 筛选 */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.9rem;
  padding: 0.85rem;
  border: 2px solid var(--line);
  background: var(--carbon);
}

.page-faq .faq-chip {
  appearance: none;
  border: 2px solid var(--line);
  background: transparent;
  color: var(--mist);
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.42rem 0.78rem;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-chip:hover {
  border-color: var(--neon);
  color: var(--paper);
}

.page-faq .faq-chip[aria-pressed="true"] {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--carbon);
}

/* 分组 */
.page-faq .faq-group {
  margin-bottom: 2.5rem;
  scroll-margin-top: calc(var(--header-offset) + 1rem);
}

.page-faq .faq-group:last-of-type {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding-bottom: 0.66rem;
  margin-bottom: 1.1rem;
  border-bottom: 3px solid var(--line);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-faq .faq-group__title {
  margin: 0;
  color: var(--paper);
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-group__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--mist);
}

/* 图片 */
.page-faq .faq-figure {
  margin: 0 0 1.1rem;
  border: 2px solid var(--line);
  background: var(--carbon);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 0.66rem 0.9rem;
  border-top: 2px solid var(--line);
  color: var(--mist);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* 手风琴 */
.page-faq .faq-item {
  margin-bottom: 0.6rem;
  border: 2px solid var(--line);
  border-left-width: 5px;
  background: var(--carbon);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

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

.page-faq .faq-item[open] {
  border-left-color: var(--neon);
  background: var(--panel);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 0.95rem 1.05rem;
  list-style: none;
  cursor: pointer;
  color: var(--paper);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
  transition: color 0.18s var(--ease);
}

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

.page-faq .faq-q:hover {
  color: var(--neon);
}

.page-faq .faq-q__num {
  flex: none;
  padding-top: 0.22rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--mist);
}

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

.page-faq .faq-q__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-q__sign {
  flex: none;
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 0.28rem;
  border: 2px solid var(--line);
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--paper);
  transition: opacity 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-q__sign::before {
  width: 8px;
  height: 2px;
}

.page-faq .faq-q__sign::after {
  width: 2px;
  height: 8px;
}

.page-faq .faq-item[open] .faq-q__sign {
  border-color: var(--neon);
}

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

.page-faq .faq-item[open] .faq-q__sign::after {
  opacity: 0;
}

.page-faq .faq-a {
  margin: 0;
  padding: 0.85rem 1.05rem 1.1rem;
  border-top: 1px dashed var(--line);
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.9;
}

.page-faq .faq-a p {
  margin: 0;
}

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

.page-faq .faq-empty {
  margin: 0;
  padding: 1.1rem 1.2rem;
  border: 2px dashed var(--line);
  color: var(--mist);
  font-size: 0.92rem;
}

/* 底部引导 */
.page-faq .faq-cta {
  display: grid;
  gap: 0.9rem;
  margin-top: 2.6rem;
  padding: 1.5rem 1.35rem;
  border: 3px solid var(--neon);
  background: var(--carbon);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-cta__title {
  margin: 0;
  color: var(--paper);
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ============ 响应式 ============ */
@media (min-width: 560px) {
  .page-faq .faq-a {
    padding-left: 4.05rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 2.6rem 0 2.5rem;
  }

  .page-faq .faq-body {
    padding: 3rem 0 4rem;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 2.6rem;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-offset) + 1.2rem);
  }

  .page-faq .faq-route__link {
    min-width: 0;
  }
}

@media (min-width: 780px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "title actions"
      "text actions";
    align-items: center;
    column-gap: 1.6rem;
    padding: 1.7rem 1.6rem;
  }

  .page-faq .faq-cta__title {
    grid-area: title;
  }

  .page-faq .faq-cta__text {
    grid-area: text;
  }

  .page-faq .faq-cta__actions {
    grid-area: actions;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-chip,
  .page-faq .faq-q,
  .page-faq .faq-item,
  .page-faq .faq-q__sign,
  .page-faq .faq-q__sign::before,
  .page-faq .faq-q__sign::after,
  .page-faq .faq-route__link {
    transition: none;
  }
}