.page-faq {
  --faq-line: rgba(44, 58, 51, 0.95);
  --faq-soft: rgba(44, 58, 51, 0.55);
  --faq-veil: rgba(198, 255, 61, 0.05);
  --faq-dim: #cfd9d2;
  background: var(--bg);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(40px, 7vw, 96px) 0 clamp(36px, 5vw, 64px);
  background: var(--night-soft);
  border-bottom: 1px solid var(--faq-line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--faq-veil) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-veil) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.7;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: var(--step-xl);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin-top: 20px;
  max-width: 62ch;
  color: var(--faq-dim);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 34px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-hero__meta .mono {
  font-size: 20px;
  color: var(--lime);
  letter-spacing: 0;
}

/* ---------- 分组标签条 ---------- */
.page-faq .faq-tabs {
  border-bottom: 1px solid var(--faq-line);
  background: var(--bg);
}

.page-faq .faq-filterbar {
  display: flex;
  gap: 8px;
  padding: 14px 0;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}

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

.page-faq .faq-filterbar .filter-btn {
  flex: 0 0 auto;
  white-space: nowrap;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-list {
  padding-top: clamp(34px, 5vw, 60px);
}

.page-faq .faq-group {
  margin-bottom: clamp(40px, 6vw, 76px);
}

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

.page-faq .faq-group__head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-size: var(--step-l);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-faq .faq-group__desc {
  margin: 10px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--faq-line);
  padding-left: 20px;
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: var(--lime);
  opacity: 0;
  transform: scaleY(0.35);
  transform-origin: top center;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.page-faq .qa[open]::before {
  opacity: 1;
  transform: scaleY(1);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  list-style: none;
  cursor: pointer;
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
  transition: color 0.18s ease;
}

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

.page-faq .qa__q:hover {
  color: var(--lime);
}

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 7px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--lime);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-faq .qa__sign::before {
  left: 0;
  right: 0;
  top: 7px;
  height: 2px;
}

.page-faq .qa__sign::after {
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding-bottom: 26px;
  max-width: 68ch;
}

.page-faq .qa__a p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-dim);
}

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

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

.page-faq .qa__anchor {
  display: inline-flex;
  align-items: center;
  margin-top: 6px;
  padding: 5px 13px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--faq-soft);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .qa__anchor:hover {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 四步排查 ---------- */
.page-faq .faq-steps-section {
  padding-top: clamp(30px, 4vw, 48px);
}

.page-faq .steps {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
}

.page-faq .step {
  position: relative;
  padding: 26px 0;
  border-top: 1px solid var(--faq-line);
}

.page-faq .step:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .step__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-faq .step__head {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: var(--step-m);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-faq .step__body p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--faq-dim);
}

/* ---------- 图 ---------- */
.page-faq .faq-fig {
  margin: 34px 0 0;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

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

.page-faq .faq-fig figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--faq-line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-faq .faq-fig--square {
  margin: 0;
  max-width: 280px;
}

.page-faq .faq-fig--square img {
  aspect-ratio: 1 / 1;
}

/* ---------- 口径速查表 ---------- */
.page-faq .faq-layers {
  position: relative;
  padding-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-table {
  margin-top: 28px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-table .data-table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
}

.page-faq .faq-table .data-table th,
.page-faq .faq-table .data-table td {
  padding: 16px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--faq-soft);
  font-size: 15px;
  line-height: 1.65;
}

.page-faq .faq-table .data-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--raise);
  white-space: nowrap;
}

.page-faq .faq-table .data-table tbody th {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--lime);
  white-space: nowrap;
}

.page-faq .faq-table .data-table tbody td {
  color: var(--faq-dim);
}

.page-faq .faq-table .data-table tbody tr {
  transition: background 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .faq-table .data-table tbody tr:hover {
  background: var(--faq-veil);
  box-shadow: inset 2px 0 0 0 var(--lime);
}

.page-faq .faq-table .data-table tbody tr:last-child th,
.page-faq .faq-table .data-table tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- 人工核对 ---------- */
.page-faq .faq-manual {
  position: relative;
  padding-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-manual__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-manual__intro h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: var(--step-l);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-faq .manual-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .manual-list li {
  position: relative;
  padding: 16px 18px 16px 42px;
  background: var(--panel);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.72;
  color: var(--faq-dim);
  transition: border-color 0.18s ease;
}

.page-faq .manual-list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 24px;
  width: 10px;
  height: 3px;
  background: var(--orange);
}

.page-faq .manual-list li:hover {
  border-color: rgba(255, 75, 36, 0.5);
}

/* ---------- 反馈入口 ---------- */
.page-faq .faq-contact {
  padding-top: clamp(34px, 5vw, 56px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: 30px;
  padding: clamp(24px, 4vw, 48px);
  background: var(--night);
  border: 1px solid var(--faq-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-faq .faq-contact__body h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-size: var(--step-l);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.page-faq .faq-contact__body .btn {
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero h1 {
    max-width: 24ch;
  }

  .page-faq .step {
    display: grid;
    grid-template-columns: 84px 1fr;
    gap: 0 20px;
    align-items: start;
    padding: 30px 0;
  }

  .page-faq .step__num {
    margin-bottom: 0;
    padding-top: 5px;
    font-size: 14px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-manual__grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: 1fr 280px;
    align-items: center;
  }

  .page-faq .faq-fig--square {
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa::before,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .qa__q,
  .page-faq .qa__anchor,
  .page-faq .faq-table .data-table tbody tr,
  .page-faq .manual-list li {
    transition: none;
  }

  .page-faq .qa[open]::before {
    transform: none;
  }
}