.page-faq {
  --faq-gap: clamp(20px, 3vw, 40px);
  --faq-line: var(--archive);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  padding: clamp(22px, 4vw, 48px) 0 clamp(24px, 4vw, 44px);
  border-bottom: var(--bw-strong) solid var(--ink);
}

.page-faq .faq-intro-grid {
  display: grid;
  gap: 26px;
}

.page-faq .faq-intro-main h1 {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(32px, 6.2vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  max-width: 18ch;
}

.page-faq .faq-intro-main .lede {
  max-width: 62ch;
  margin: 0;
}

.page-faq .faq-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-line);
  border: var(--bw-strong) solid var(--ink);
  box-shadow: var(--shadow-sm);
}

.page-faq .faq-meta-item {
  background: var(--paper);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-faq .faq-meta-num {
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  color: var(--slate);
  letter-spacing: -0.02em;
}

.page-faq .faq-meta-label {
  font-size: 12px;
  line-height: 1.4;
  color: var(--graphite);
}

/* ---------- 通用图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 var(--faq-gap);
}

/* ---------- 矩阵 ---------- */
.page-faq .matrix-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  border: var(--bw-strong) solid var(--ink);
  box-shadow: var(--shadow);
  background: var(--paper);
  -webkit-overflow-scrolling: touch;
}

.page-faq .matrix-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 660px;
  font-size: 14px;
}

.page-faq .matrix-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--graphite);
  border-bottom: var(--bw) solid var(--faq-line);
  background: var(--paper);
}

.page-faq .matrix-table th,
.page-faq .matrix-table td {
  border-right: var(--bw) solid var(--faq-line);
  border-bottom: var(--bw) solid var(--faq-line);
  padding: 0;
  text-align: center;
  vertical-align: middle;
  height: 54px;
  font-weight: 400;
}

.page-faq .matrix-table thead th {
  background: var(--grid);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--graphite);
  height: 46px;
  letter-spacing: 0.04em;
}

.page-faq .matrix-table thead th:first-child {
  text-align: left;
  padding-left: 16px;
  font-size: 11.5px;
}

.page-faq .matrix-table tbody th {
  background: var(--grid);
  text-align: left;
  padding-left: 16px;
  width: 96px;
}

.page-faq .matrix-table th:last-child,
.page-faq .matrix-table td:last-child {
  border-right: 0;
}

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

.page-faq .matrix-table td {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  transition: box-shadow var(--dur) var(--ease);
}

.page-faq .matrix-table td:hover {
  box-shadow: inset 0 0 0 2px var(--ink);
}

.page-faq .cell--ok {
  background: var(--slate);
  color: var(--paper);
}

.page-faq .cell--limited {
  background: var(--slate-lite);
  color: var(--ink);
}

.page-faq .cell--pending {
  background: repeating-linear-gradient(135deg, transparent 0 5px, var(--grid) 5px 6px), var(--paper);
  color: var(--graphite);
}

.page-faq .matrix-table .copy-chip {
  border: 0;
  background: transparent;
  padding: 3px 5px;
  font-family: var(--font-mono);
  font-size: inherit;
  color: inherit;
  cursor: pointer;
  border-bottom: 1px dashed var(--faq-line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .matrix-table .copy-chip:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-faq .matrix-legend {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .matrix-legend li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 13px;
  line-height: 1.65;
  color: var(--graphite);
}

.page-faq .swatch {
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 4px;
  border: var(--bw) solid var(--ink);
}

.page-faq .swatch--ok {
  background: var(--slate);
}

.page-faq .swatch--limited {
  background: var(--slate-lite);
}

.page-faq .swatch--pending {
  background: repeating-linear-gradient(135deg, transparent 0 3px, var(--grid) 3px 4px), var(--paper);
}

.page-faq .matrix-foot {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--graphite);
}

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

.page-faq a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 安装步骤 ---------- */
.page-faq .setup-grid {
  display: grid;
  gap: 30px;
}

.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--bw-strong) solid var(--ink);
}

.page-faq .step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 20px 0 20px 0;
  border-bottom: var(--bw) solid var(--faq-line);
  border-left: var(--bw-strong) solid transparent;
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .step:hover {
  background: var(--grid);
  border-left-color: var(--gold);
  padding-left: 12px;
}

.page-faq .step-num {
  font-size: clamp(38px, 7vw, 62px);
  font-weight: 700;
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: var(--slate-lite);
}

.page-faq .step-body h3 {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 19px;
  margin: 0 0 6px;
}

.page-faq .step-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 62ch;
}

/* ---------- 对接说明 ---------- */
.page-faq .iface-notes {
  margin-top: 24px;
  display: grid;
  gap: 16px;
  border-left: var(--bw-strong) solid var(--slate-lite);
  padding-left: 18px;
}

.page-faq .iface-notes p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 78ch;
}

.page-faq .iface-notes strong {
  color: var(--ink);
  font-weight: 500;
}

/* ---------- 故障排查 ---------- */
.page-faq .trouble-filter {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-faq .trouble-filter input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .trouble-filter label {
  display: inline-block;
  border: var(--bw-strong) solid var(--ink);
  background: var(--paper);
  padding: 7px 15px;
  font-size: 13.5px;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .trouble-filter label:hover {
  background: var(--grid);
}

.page-faq .trouble-filter input:checked + label {
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow-sm);
}

.page-faq .trouble-filter input:focus-visible + label {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .trouble-wrap:has(#tf-blank:checked) .trouble-item:not([data-cat="blank"]),
.page-faq .trouble-wrap:has(#tf-signal:checked) .trouble-item:not([data-cat="signal"]),
.page-faq .trouble-wrap:has(#tf-touch:checked) .trouble-item:not([data-cat="touch"]),
.page-faq .trouble-wrap:has(#tf-net:checked) .trouble-item:not([data-cat="net"]) {
  display: none;
}

.page-faq .trouble-list {
  border-top: var(--bw-strong) solid var(--ink);
}

.page-faq .trouble-item {
  border-bottom: var(--bw) solid var(--faq-line);
}

.page-faq .trouble-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

.page-faq .trouble-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .trouble-item summary::before {
  content: "+";
  flex: none;
  width: 14px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--slate);
}

.page-faq .trouble-item[open] summary::before {
  content: "−";
}

.page-faq .trouble-item summary:hover {
  color: var(--slate);
}

.page-faq .trouble-cat {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  border: var(--bw) solid var(--slate);
  color: var(--slate);
  padding: 2px 8px;
}

.page-faq .trouble-title {
  font-size: 16px;
  font-weight: 500;
}

.page-faq .trouble-steps {
  list-style: none;
  counter-reset: ts;
  margin: 0 0 20px 26px;
  padding: 0 0 0 18px;
  border-left: var(--bw) solid var(--slate-lite);
  display: grid;
  gap: 9px;
}

.page-faq .trouble-steps li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 74ch;
}

.page-faq .trouble-steps li::before {
  counter-increment: ts;
  content: counter(ts, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
}

/* ---------- 问题反馈 ---------- */
.page-faq .info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--faq-line);
}

.page-faq .info-list li {
  background: var(--paper);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .info-key {
  flex: none;
  width: 76px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--graphite);
  padding-top: 2px;
}

.page-faq .info-val {
  flex: 1 1 180px;
  color: var(--ink);
}

.page-faq .report-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .report-side p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 66ch;
}

.page-faq .report-contact {
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--ink);
  border-top: var(--bw) solid var(--faq-line);
  padding-top: 14px;
}

.page-faq .report-side .btn {
  justify-self: start;
}

/* ---------- 电脑端查询 ---------- */
.page-faq .lookup-index {
  border-left: var(--bw-strong) solid var(--slate);
  padding-left: 16px;
  align-self: start;
}

.page-faq .lookup-index-num {
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: var(--slate-lite);
  margin: 0 0 8px;
}

.page-faq .lookup-index-label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--graphite);
}

.page-faq .lookup-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--bw-strong) solid var(--ink);
}

.page-faq .lookup-list li {
  border-bottom: var(--bw) solid var(--faq-line);
  padding: 16px 0;
}

.page-faq .lookup-list h3 {
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 16.5px;
  margin: 0 0 6px;
}

.page-faq .lookup-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
  max-width: 72ch;
}

.page-faq .lookup-foot {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--graphite);
  border-left: var(--bw-strong) solid var(--celadon-lite);
  padding-left: 14px;
}

/* ---------- 结尾 ---------- */
.page-faq .faq-cta {
  border: var(--bw-strong) solid var(--ink);
  box-shadow: var(--shadow);
  background: linear-gradient(120deg, var(--paper) 0%, var(--paper) 46%, var(--slate-lite) 100%);
  padding: clamp(20px, 3.4vw, 34px);
  display: grid;
  gap: 20px;
}

.page-faq .faq-cta p {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 400;
  line-height: 1.5;
  max-width: 44ch;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .step {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }

  .page-faq .matrix-legend {
    gap: 12px;
  }
}

@media (min-width: 760px) {
  .page-faq .matrix-legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro-grid {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
    gap: 52px;
  }

  .page-faq .faq-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 1000px) {
  .page-faq .setup-grid {
    grid-template-columns: 380px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .faq-figure--side {
    margin-bottom: 0;
    position: sticky;
    top: 96px;
  }
}
<<<END>>>