.page-faq {
  --faq-accent: var(--cyan);
  --faq-block: clamp(44px, 6vw, 84px);
  background: var(--bg-void);
  color: var(--text);
  padding-bottom: var(--faq-block);
}

.page-faq .breadcrumb {
  padding-top: clamp(18px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
  padding: clamp(20px, 3vw, 36px) 0 var(--faq-block);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 6.4vw, 64px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero__lede {
  max-width: 38em;
  margin: 0 0 20px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-hero__note {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-hero__note::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--cyan);
  flex: none;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg-panel);
  overflow: hidden;
}

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 72px);
  }
}

/* ---------- 筛选与分组跳转 ---------- */
.page-faq .faq-controls {
  display: grid;
  gap: 14px;
  padding: 14px 0;
  background: var(--bg-void);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .filter-bar {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: none;
}

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

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

.page-faq .filter-btn[aria-pressed="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(0, 229, 192, 0.08);
}

.page-faq .filter-btn[aria-pressed="true"]::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  vertical-align: middle;
  background: var(--cyan);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .faq-jump a {
  color: var(--text-dim);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

@media (min-width: 1024px) {
  .page-faq .faq-controls {
    position: sticky;
    top: var(--header-h);
    z-index: 6;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 28px;
  }

  .page-faq .faq-jump {
    justify-content: flex-end;
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(40px, 5vw, 72px);
  scroll-margin-top: calc(var(--header-h) + 96px);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--line);
}

.page-faq .faq-group--access,
.page-faq .faq-group--service {
  --faq-accent: var(--cyan);
}

.page-faq .faq-group--version,
.page-faq .faq-group--reply {
  --faq-accent: var(--legacy);
}

.page-faq .faq-group--space {
  --faq-accent: var(--gold);
}

.page-faq .faq-group__bar {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-left: 16px;
  border-left: 2px solid var(--faq-accent);
  margin-bottom: 12px;
}

.page-faq .faq-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--faq-accent);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group__desc {
  margin: 0 0 20px 18px;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-group__figure {
  margin: 0 0 24px;
  max-width: 520px;
  border: 1px solid var(--line);
  background: var(--bg-panel);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 46px 16px 12px;
  list-style: none;
  cursor: pointer;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  transition: background-color 0.24s var(--ease), color 0.24s var(--ease);
}

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

.page-faq .faq-q:hover {
  background-image: linear-gradient(90deg, rgba(0, 229, 192, 0.08), rgba(0, 229, 192, 0) 72%);
}

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

.page-faq .faq-q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 16px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--text-dim);
  transition: color 0.24s var(--ease);
}

.page-faq .faq-item[open] > .faq-q::after {
  content: "-";
  color: var(--faq-accent);
}

.page-faq .faq-q__no {
  flex: none;
  min-width: 36px;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--faq-accent);
}

.page-faq .faq-a {
  padding: 0 12px 24px 12px;
  max-width: 74ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 192, 0.35);
  transition: border-color 0.24s var(--ease);
}

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

@media (min-width: 720px) {
  .page-faq .faq-q {
    padding-left: 18px;
  }

  .page-faq .faq-a {
    padding-left: 62px;
    padding-right: 46px;
  }
}

/* ---------- 筛选状态 ---------- */
.page-faq [data-filter-item][hidden] {
  display: none;
}

.page-faq .filter-empty {
  margin: 0;
  padding: 40px 4px;
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.85;
}

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

.page-faq .filter-empty a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 192, 0.35);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta {
  position: relative;
  margin-top: var(--faq-block);
  padding: clamp(28px, 4vw, 48px) clamp(20px, 3vw, 44px);
  background: var(--bg-section);
  border: 1px solid var(--line);
}

.page-faq .faq-cta::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 100%;
  background: var(--cyan);
}

.page-faq .faq-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-cta p {
  margin: 0 0 24px;
  max-width: 52em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .faq-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (prefers-reduced-motion: reduce) {
  .page-faq * {
    transition-duration: 0.01ms !important;
  }
}