.page-faq {
  --faq-rail-w: 320px;
  --faq-border: 1px solid var(--base-700);
}

.page-faq .breadcrumb {
  margin-top: clamp(18px, 3vw, 30px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  padding: clamp(22px, 4vw, 42px) 0 clamp(34px, 5vw, 68px);
}

.page-faq .faq-hero__head {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-hero__head .lead {
  max-width: 34em;
  margin: 0;
}

.page-faq .faq-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

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

.page-faq .faq-note {
  background: var(--base-900);
  border: var(--faq-border);
  border-left: 3px solid var(--cyan);
  border-radius: 6px;
  padding: 16px 18px;
}

.page-faq .faq-note__k {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-note p {
  margin: 9px 0 0;
  font-family: var(--font-data);
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--text);
}

.page-faq .faq-legend {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-legend .legend__item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

.page-faq .faq-legend .legend__swatch {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex: none;
}

.page-faq .faq-legend .legend__swatch--cyan { background: var(--cyan); }
.page-faq .faq-legend .legend__swatch--dim { background: var(--cyan-dim); }
.page-faq .faq-legend .legend__swatch--amber { background: var(--amber); }
.page-faq .faq-legend .legend__swatch--alert { background: var(--alert); }

/* ---------- 区块骨架 ---------- */
.page-faq .faq-section {
  padding: clamp(38px, 5.5vw, 72px) 0;
  border-top: var(--faq-border);
}

.page-faq .faq-sec-head {
  display: grid;
  gap: 12px;
  max-width: 46em;
}

.page-faq .faq-sec-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-faq .faq-sec-desc {
  margin: 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 四类问题 ---------- */
.page-faq .faq-triage {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-q {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 18px;
  background: var(--base-900);
  border: var(--faq-border);
  border-radius: 6px;
  text-decoration: none;
  overflow: hidden;
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .faq-q::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent 72%);
  opacity: 0;
  transition: opacity 0.24s var(--ease);
}

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  transform: translateY(-4px);
  border-color: var(--cyan-dim);
  background: var(--base-800);
}

.page-faq .faq-q:hover::after,
.page-faq .faq-q:focus-visible::after {
  opacity: 1;
}

.page-faq .faq-q__num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-q h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.4;
  color: var(--text);
}

.page-faq .faq-q p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-q__go {
  margin-top: auto;
  padding-top: 4px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

/* ---------- 工作台：左对照 / 右流程 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-rail__inner {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--text);
}

.page-faq .faq-rail__note,
.page-faq .faq-rail__foot {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .faq-rail__foot {
  border-left: 2px solid var(--alert);
  padding-left: 12px;
}

.page-faq .faq-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: var(--faq-border);
  border-radius: 6px;
  background: var(--base-900);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 300px;
  border-collapse: collapse;
  font-size: 12.5px;
}

.page-faq .faq-table__cap {
  caption-side: top;
  text-align: left;
  padding: 12px 12px 0;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--base-700);
}

.page-faq .faq-table thead th {
  background: var(--base-800);
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan-dim);
}

.page-faq .faq-table tbody th {
  font-family: var(--font-data);
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.page-faq .faq-table td {
  color: var(--muted);
  line-height: 1.65;
}

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

.page-faq .faq-table tbody tr:last-child td {
  color: var(--alert-soft);
}

.page-faq .faq-flow {
  display: grid;
  gap: clamp(44px, 6vw, 78px);
}

.page-faq .faq-block {
  display: grid;
  gap: 14px;
}

.page-faq .faq-block__lead {
  margin: 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-block__foot {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-dim);
  font-size: 14px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 8px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: var(--faq-border);
  border-radius: 8px;
  background: var(--base-900);
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06) brightness(0.94);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 五步排查 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  background: var(--base-900);
  border: var(--faq-border);
  border-left: 3px solid var(--cyan-dim);
  border-radius: 6px;
  transition: border-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-faq .faq-step:hover {
  border-left-color: var(--cyan);
  transform: translateX(3px);
}

.page-faq .faq-step__num {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-faq .faq-step h3 {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.45;
  color: var(--text);
}

.page-faq .faq-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--muted);
}

.page-faq .faq-step__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.page-faq .faq-step:last-child {
  border-left-color: var(--alert);
}

.page-faq .faq-step:last-child:hover {
  border-left-color: var(--alert-soft);
}

.page-faq .faq-step:last-child .faq-step__num {
  color: var(--alert-soft);
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: var(--faq-border);
  border-radius: 999px;
  background: var(--base-800);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-chip--cyan {
  border-color: var(--cyan-dim);
  color: var(--cyan);
}

.page-faq .faq-chip--amber {
  border-color: var(--amber);
  color: var(--amber);
}

.page-faq .faq-chip--alert {
  border-color: var(--alert);
  color: var(--alert-soft);
}

/* ---------- 纸面阅读块 ---------- */
.page-faq .faq-paper {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid #D8CFC0;
  border-radius: 8px;
  padding: clamp(20px, 3vw, 30px);
}

.page-faq .faq-paper p {
  margin: 0 0 14px;
  font-family: var(--font-editorial);
  font-size: 15px;
  line-height: 1.86;
  color: #4A3B33;
  max-width: 36em;
}

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

.page-faq .faq-paper__list {
  margin: 0 0 14px;
  padding-left: 20px;
  display: grid;
  gap: 10px;
  max-width: 36em;
}

.page-faq .faq-paper__list li {
  font-size: 14.5px;
  line-height: 1.8;
  color: #4A3B33;
}

.page-faq .faq-paper__list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 换设备自检 ---------- */
.page-faq .faq-check {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-check li {
  position: relative;
  padding: 13px 16px 13px 44px;
  background: var(--base-900);
  border: 1px dashed var(--base-700);
  border-radius: 6px;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--muted);
}

.page-faq .faq-check li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 17px;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan-dim);
  border-radius: 3px;
}

/* ---------- 提交问题 ---------- */
.page-faq .faq-submit {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

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

.page-faq .faq-submit__intro p {
  margin: 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-submit__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.page-faq .faq-submit__card {
  display: grid;
  gap: 14px;
  align-content: start;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--base-900);
  border: var(--faq-border);
  border-top: 3px solid var(--amber);
  border-radius: 8px;
}

.page-faq .faq-submit__k {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-submit__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-submit__list li {
  display: grid;
  gap: 3px;
  padding: 11px 0;
  border-bottom: 1px solid var(--base-700);
}

.page-faq .faq-submit__list li:first-child {
  padding-top: 0;
}

.page-faq .faq-submit__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-submit__list span {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text);
}

.page-faq .faq-submit__list em {
  font-style: normal;
  font-size: 13px;
  line-height: 1.66;
  color: var(--muted);
}

.page-faq .faq-submit__note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--base-700);
  font-size: 13px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-triage {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 1fr);
    align-items: end;
  }

  .page-faq .faq-submit {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-triage {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: relative;
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: 28px;
  }
}

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

  .page-faq .faq-q:hover,
  .page-faq .faq-q:focus-visible,
  .page-faq .faq-step:hover {
    transform: none;
  }
}