.page-faq {
  display: block;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  padding: 32px 0 56px;
  background:
    linear-gradient(180deg, rgba(7, 13, 21, .96) 0%, rgba(7, 13, 21, .82) 60%, rgba(7, 13, 21, .96) 100%),
    repeating-linear-gradient(180deg, rgba(30, 48, 72, .28) 0 1px, transparent 1px 96px);
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 24px;
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 16px;
}

.page-faq h1.display-xl {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 8.5vw, 52px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 0 0 20px;
  max-width: 20ch;
}

.page-faq .lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-hero-side {
  border-left: 2px solid var(--lime);
  padding: 4px 0 4px 18px;
}

.page-faq .faq-side-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 42ch;
}

.page-faq .faq-hero-media.media-frame {
  margin: 0;
  border: 2px solid var(--rule);
  box-shadow: var(--shadow);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1400 / 600;
  object-fit: cover;
  filter: saturate(.88) contrast(1.05);
}

/* ============ 分类标签跳转条 ============ */
.page-faq .faq-jump {
  border-top: 2px solid var(--rule);
  border-bottom: 2px solid var(--rule);
  background: rgba(14, 26, 43, .72);
}

.page-faq .faq-tags {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 16px 0;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-tag {
  flex: 0 0 auto;
  scroll-snap-align: start;
  padding: 9px 18px;
  border: 2px solid var(--rule);
  border-radius: 999px;
  background: transparent;
  color: var(--paper);
  font-size: 13px;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-tag:hover,
.page-faq .faq-tag:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(200, 247, 81, .06);
  box-shadow: var(--shadow-sm);
  outline: none;
}

/* ============ 区块通用 ============ */
.page-faq .faq-block {
  padding: 64px 0;
  border-bottom: 1px solid var(--rule-soft);
}

.page-faq .faq-block:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-block-head {
  margin-bottom: 32px;
  max-width: 62ch;
}

.page-faq .index-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--lime);
  margin-bottom: 10px;
}

.page-faq h2.display-m {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.6vw, 34px);
  line-height: 1.1;
  letter-spacing: -.01em;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-faq .faq-block-lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* ============ 三步自检 ============ */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--rule);
  counter-reset: faq-step;
}

.page-faq .faq-step {
  padding: 24px 0 24px 0;
  border-bottom: 1px solid var(--rule-soft);
  position: relative;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 56px;
  height: 2px;
  background: var(--lime);
}

.page-faq .faq-step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime);
  margin-bottom: 10px;
}

.page-faq .faq-step-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  color: var(--paper);
  margin: 0 0 10px;
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 68ch;
}

/* ============ 问答展开组 ============ */
.page-faq .faq-list {
  border-top: 2px solid var(--rule);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--rule-soft);
  transition: background var(--dur) var(--ease);
}

.page-faq .faq-item[data-open="true"] {
  background: var(--teal);
}

.page-faq .faq-q-heading {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-q {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 16px;
  background: transparent;
  border: 0;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color var(--dur) var(--ease), padding var(--dur) var(--ease);
}

.page-faq .faq-q:hover .faq-q-text,
.page-faq .faq-q:focus-visible .faq-q-text {
  color: var(--lime);
}

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

.page-faq .faq-icon {
  flex: 0 0 auto;
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-icon::before,
.page-faq .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--lime);
}

.page-faq .faq-icon::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .faq-icon::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
  transition: opacity var(--dur) var(--ease);
}

.page-faq .faq-item[data-open="true"] .faq-icon {
  transform: rotate(90deg);
}

.page-faq .faq-item[data-open="true"] .faq-icon::after {
  opacity: 0;
}

.page-faq .faq-q-text {
  transition: color var(--dur) var(--ease);
}

.page-faq .expand-panel {
  padding: 0 16px 20px 46px;
}

.page-faq .expand-body p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 68ch;
}

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

.page-faq .expand-body a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--lime-deep);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .expand-body a:hover,
.page-faq .expand-body a:focus-visible {
  color: var(--lime-deep);
  border-color: var(--lime);
  outline: none;
}

/* ============ 换设备区 ============ */
.page-faq .faq-device-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-device-media.media-frame {
  margin: 0;
  border: 2px solid var(--rule);
  box-shadow: var(--shadow);
  background: var(--ink-2);
  align-self: start;
}

.page-faq .faq-device-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1100 / 740;
  object-fit: cover;
}

.page-faq .faq-device-media .media-caption {
  display: block;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
  border-top: 1px solid var(--rule);
}

/* ============ 人工协助区 ============ */
.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 32px;
}

.page-faq .faq-contact-card {
  border: 2px solid var(--rule);
  border-left: 4px solid var(--lime);
  padding: 22px 20px;
  background: rgba(7, 13, 21, .5);
}

.page-faq .faq-contact-card .tag {
  display: inline-block;
  margin-bottom: 14px;
}

.page-faq .faq-contact-card p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  max-width: 60ch;
}

.page-faq .faq-contact-card p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.page-faq .faq-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 2px solid var(--rule);
  border-bottom: 2px solid var(--rule);
}

.page-faq .faq-channel {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule-soft);
}

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

.page-faq .faq-channel-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-channel-value {
  font-family: var(--font-mono);
  font-size: clamp(17px, 4.4vw, 22px);
  font-weight: 600;
  color: var(--lime);
  word-break: break-word;
}

.page-faq .faq-more {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 68ch;
}

.page-faq .faq-more a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--rule);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-more a:hover,
.page-faq .faq-more a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  outline: none;
}

/* ============ 平板 ============ */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 48px 0 72px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: 32px;
    align-items: end;
  }

  .page-faq .faq-block {
    padding: 80px 0;
  }

  .page-faq .faq-step {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 8px 24px;
    align-items: start;
    padding: 26px 0;
  }

  .page-faq .faq-step-num {
    margin-bottom: 0;
    padding-top: 4px;
  }

  .page-faq .faq-step-title {
    grid-column: 2;
    margin-bottom: 8px;
  }

  .page-faq .faq-step p {
    grid-column: 2;
  }

  .page-faq .faq-q {
    padding: 20px 24px;
  }

  .page-faq .expand-panel {
    padding: 0 24px 22px 58px;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-faq .faq-channels {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-channel {
    padding: 20px 24px 20px 0;
    border-bottom: 0;
    border-right: 1px solid var(--rule-soft);
  }

  .page-faq .faq-channel:last-child {
    padding-left: 24px;
    border-right: 0;
  }
}

/* ============ 桌面 ============ */
@media (min-width: 1080px) {
  .page-faq .faq-hero {
    padding: 56px 0 88px;
  }

  .page-faq h1.display-xl {
    font-size: clamp(40px, 4.2vw, 54px);
  }

  .page-faq .faq-block {
    padding: 96px 0;
  }

  .page-faq .faq-device-grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-device-media.media-frame {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-tags {
    flex-wrap: wrap;
    overflow-x: visible;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: 8fr 4fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-icon,
  .page-faq .faq-tag,
  .page-faq .faq-q,
  .page-faq .faq-item {
    transition: none;
  }
}