.page-faq {
  --faq-gap: clamp(1.5rem, 4vw, 3.25rem);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  overflow-x: clip;
}

.page-faq .shell {
  width: min(1180px, 100% - 2.5rem);
  margin-inline: auto;
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 3vw, 1.75rem);
  padding-block: clamp(1.25rem, 3vw, 2.5rem);
}

.page-faq .faq-hero-frame {
  position: relative;
  background: var(--deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  padding: clamp(1.5rem, 4vw, 3rem);
  overflow: hidden;
  isolation: isolate;
}

.page-faq .faq-hero-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid var(--line-soft);
  border-radius: calc(var(--radius-l) - 10px);
  pointer-events: none;
  z-index: 1;
}

.page-faq .faq-hero-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line-soft) 0 1px,
    transparent 1px 26px
  );
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 42%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 42%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero-frame > * {
  position: relative;
  z-index: 2;
}

.page-faq .faq-kicker {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--mint);
  text-transform: uppercase;
}

.page-faq .faq-hero-title {
  margin: 0 0 1rem;
  font-size: clamp(1.85rem, 4.6vw, 3.1rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.page-faq .faq-hero-lede {
  margin: 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .faq-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-hero-stats .stat {
  flex: 1 1 8.5rem;
  min-width: 0;
  padding: 0.8rem 1rem;
  border-radius: var(--radius-m);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-faq .faq-hero-stats .stat-value {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-hero-stats .stat-label {
  font-size: 0.78rem;
  color: var(--mist);
  letter-spacing: 0.03em;
}

.page-faq .faq-hero-media {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  min-height: 200px;
}

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

/* ---------- 分类索引条 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: 0;
  z-index: 6;
  margin-block: clamp(0.75rem, 2vw, 1.5rem);
  padding-block: 0.7rem;
  background: rgba(10, 18, 16, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-block: 1px solid var(--line-soft);
}

.page-faq .faq-index-inner {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.page-faq .faq-index-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .faq-index-list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-chip {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.95rem;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--mist);
  font-size: 0.85rem;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  color: var(--ink);
  background: var(--mint);
  border-color: var(--mint);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
  align-items: start;
  padding-top: clamp(1rem, 3vw, 2rem);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-main-h) + 84px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.5rem, 6vw, 4.25rem);
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  gap: 0.25rem 0.75rem;
  align-items: baseline;
  margin-bottom: 1.15rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group-kicker {
  grid-column: 1;
  grid-row: 1 / span 2;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-faq .faq-group-title {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-faq .faq-group-note {
  grid-column: 2;
  grid-row: 2;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 问答卡片 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0.6rem;
}

.page-faq .qa {
  border-radius: var(--radius-m);
  background: var(--deep);
  border: 1px solid var(--line-soft);
  border-left: 3px solid rgba(47, 227, 154, 0.35);
  transition: background 0.24s ease, border-color 0.24s ease;
}

.page-faq .qa:has(.qa-trigger[aria-expanded="true"]) {
  background: var(--panel);
  border-left-color: var(--mint);
}

.page-faq .qa-heading {
  margin: 0;
  font-size: 1rem;
  font-weight: inherit;
}

.page-faq .qa-trigger {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  background: none;
  border: 0;
  border-radius: var(--radius-m);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: color 0.2s ease;
}

.page-faq .qa-trigger:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -2px;
}

.page-faq .qa-text {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0.005em;
}

.page-faq .qa-trigger[aria-expanded="true"] .qa-text {
  color: var(--mint);
}

.page-faq .qa-mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border-radius: 50%;
  border: 1px solid var(--line);
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  background: var(--mint);
  transform: translateY(-50%);
  transition: transform 0.24s ease, opacity 0.24s ease;
}

.page-faq .qa-mark::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .qa-trigger[aria-expanded="true"] .qa-mark::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0.35;
}

.page-faq .qa-panel {
  padding: 0 1.1rem 1.15rem;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-faq .qa-panel::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: 0.9rem;
  background: var(--line-soft);
}

.page-faq .qa-panel p {
  margin: 0 0 0.55rem;
  max-width: 34em;
}

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

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

.page-faq .qa-steps {
  counter-reset: qa-step;
  display: grid;
  gap: 0.45rem;
  margin: 0.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa-steps li {
  counter-increment: qa-step;
  display: grid;
  grid-template-columns: 1.4rem 1fr;
  gap: 0.6rem;
  align-items: start;
  font-size: 0.9rem;
  line-height: 1.7;
}

.page-faq .qa-steps li::before {
  content: counter(qa-step);
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  background: var(--mint-soft);
  color: var(--mint);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.4rem;
  text-align: center;
}

/* ---------- 区内配图 ---------- */
.page-faq .faq-figure {
  margin: 1rem 0 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--panel);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  padding: 0.7rem 1rem 0.85rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 侧栏 ---------- */
.page-faq .faq-aside {
  display: grid;
  gap: 1rem;
}

.page-faq .faq-contact {
  position: relative;
  padding: 1.35rem 1.25rem 1.35rem 1.5rem;
  border-radius: var(--radius-l);
  background: var(--deep);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--amber);
}

.page-faq .faq-contact--alt::before {
  background: var(--aqua);
}

.page-faq .faq-contact-kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-faq .faq-contact--alt .faq-contact-kicker {
  color: var(--aqua);
}

.page-faq .faq-contact-title {
  margin: 0 0 0.6rem;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-contact-note {
  margin: 0 0 1rem;
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-contact-list {
  display: grid;
  gap: 0.7rem;
  margin: 0 0 1.1rem;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-contact-row {
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-contact-label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-contact-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact-value--amber {
  color: var(--amber);
}

.page-faq .faq-contact-action {
  width: 100%;
  justify-content: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-index-inner {
    flex-direction: row;
    align-items: center;
    gap: 1.25rem;
  }

  .page-faq .faq-index-label {
    flex: 0 0 auto;
  }

  .page-faq .qa-trigger {
    padding: 1.1rem 1.35rem;
  }

  .page-faq .qa-panel {
    padding: 0 1.35rem 1.3rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: stretch;
  }

  .page-faq .faq-hero-media img {
    aspect-ratio: auto;
    height: 100%;
  }

  .page-faq .faq-figure {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-figure img {
    aspect-ratio: 9 / 7;
    height: 100%;
  }

  .page-faq .faq-figure figcaption {
    border-top: 0;
    border-left: 1px solid var(--line-soft);
    padding: 1rem 1.15rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-aside {
    position: sticky;
    top: calc(var(--header-main-h) + 96px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .qa,
  .page-faq .qa-trigger,
  .page-faq .faq-chip {
    transition: none;
  }
}