.page-faq {
  --faq-rail: 176px;
  --faq-line: var(--surface-line);
  --faq-gap: 32px;
  min-width: 0;
}

.page-faq img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq button:focus-visible {
  outline: 2px solid var(--acid-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 首屏框景 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: 30px 0 40px;
  background:
    radial-gradient(120% 88% at 6% 0%, rgba(53, 242, 192, 0.07), transparent 58%),
    linear-gradient(180deg, var(--ink-800), rgba(6, 10, 18, 0));
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__frame {
  position: relative;
  padding: 26px 20px 24px;
  border: 1px solid var(--faq-line);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(20, 24, 29, 0.88), rgba(6, 10, 18, 0.5));
  overflow: hidden;
}

.page-faq .faq-hero__frame::before,
.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 9px;
  background-image: repeating-linear-gradient(90deg, var(--blueprint-line) 0 1px, transparent 1px 15px);
  pointer-events: none;
  opacity: 0.85;
}

.page-faq .faq-hero__frame::before { top: 0; }
.page-faq .faq-hero__frame::after { bottom: 0; }

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 18ch;
  color: var(--text-primary);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--surface-line-soft);
}

.page-faq .faq-hero__meta-item {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid var(--blueprint-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ---------- 快速自查三问 ---------- */

.page-faq .faq-asks__grid {
  display: grid;
  gap: 30px;
  margin-top: 26px;
}

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

.page-faq .faq-asks__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding: 20px 0;
  border-top: 1px solid var(--surface-line-soft);
}

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

.page-faq .faq-asks__num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--orange-500);
  padding-top: 3px;
}

.page-faq .faq-asks__q {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.5;
  color: var(--text-primary);
}

.page-faq .faq-asks__a {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-faq .faq-asks__media {
  margin: 0;
}

.page-faq .faq-asks__media img {
  width: 100%;
  border-radius: var(--r-sm);
  border: 1px solid var(--surface-line-soft);
  object-fit: cover;
}

.page-faq .faq-asks__cap {
  margin-top: 12px;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--text-faint);
}

@media (min-width: 900px) {
  .page-faq .faq-asks__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
}

/* ---------- 分类排查主体 ---------- */

.page-faq .faq-body__grid {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

.page-faq .faq-rail {
  min-width: 0;
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--blueprint-line);
  border-radius: 999px;
  font-size: 0.83rem;
  line-height: 1.4;
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--orange-500);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text-primary);
  border-color: var(--acid-cyan);
}

.page-faq .faq-panels {
  display: grid;
  gap: 52px;
  min-width: 0;
}

.page-faq .faq-group {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--orange-500);
  flex: 0 0 auto;
}

.page-faq .faq-group__title {
  margin: 0;
  color: var(--text-primary);
}

.page-faq .faq-group__lede {
  margin: 18px 0 6px;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-muted);
}

@media (min-width: 1024px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 60px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    padding: 0 0 0 0;
    overflow: visible;
    border-left: 1px solid var(--blueprint-line);
  }

  .page-faq .faq-rail__link {
    position: relative;
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    align-items: center;
    gap: 4px;
    padding: 15px 0 15px 22px;
    border: 0;
    border-radius: 0;
    white-space: normal;
    background: none;
  }

  .page-faq .faq-rail__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 9px;
    height: 1px;
    background: var(--blueprint-line);
    transform: translateY(-50%);
    transition: width 200ms var(--ease), background 200ms var(--ease);
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-color: transparent;
  }

  .page-faq .faq-rail__link:hover::before,
  .page-faq .faq-rail__link:focus-visible::before {
    width: 16px;
    background: var(--acid-cyan);
  }

  .page-faq .faq-rail__label {
    font-size: 0.88rem;
    line-height: 1.5;
  }
}

/* ---------- 问答折叠行 ---------- */

.page-faq .faq-q {
  border-bottom: 1px solid var(--surface-line-soft);
  transition: background 240ms var(--ease);
}

.page-faq .faq-q__ask {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 4px 20px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.5;
  color: var(--text-primary);
  transition: color 200ms var(--ease);
}

.page-faq .faq-q__ask::-webkit-details-marker { display: none; }
.page-faq .faq-q__ask::marker { content: ""; }

.page-faq .faq-q__ask::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 2px;
  border-radius: 2px;
  background: var(--acid-cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 240ms var(--ease);
}

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

.page-faq .faq-q__ask:hover {
  color: var(--acid-cyan);
}

.page-faq .faq-q__sign {
  position: relative;
  flex: 0 0 auto;
  width: 15px;
  height: 15px;
  margin-left: auto;
  margin-top: 5px;
  border: 1px solid var(--blueprint-line);
  border-radius: 3px;
  transition: border-color 200ms var(--ease);
}

.page-faq .faq-q__sign::before,
.page-faq .faq-q__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--text-muted);
  transition: transform 240ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-q__sign::before {
  width: 7px;
  height: 1px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-q__sign::after {
  width: 1px;
  height: 7px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-q[open] .faq-q__sign {
  border-color: var(--acid-cyan);
}

.page-faq .faq-q[open] .faq-q__sign::before {
  background: var(--acid-cyan);
}

.page-faq .faq-q[open] .faq-q__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-q__body {
  padding: 0 6px 24px 16px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-faq .faq-q__body p {
  margin: 0 0 12px;
}

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

.page-faq .faq-q__body a {
  color: var(--acid-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-q__body a:hover {
  color: var(--text-primary);
}

/* ---------- 口径对照标签页 ---------- */

.page-faq .faq-tabs {
  margin-top: 26px;
  padding: 22px 18px;
  border: 1px solid var(--blueprint-line);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(20, 24, 29, 0.9), rgba(6, 10, 18, 0.6));
}

.page-faq .faq-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}

.page-faq .faq-tabs__panel {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-cmp__col {
  margin: 0;
}

.page-faq .faq-cmp__col dt {
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-faq .faq-cmp__col dd {
  margin: 0 0 18px;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--text-muted);
}

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

@media (min-width: 760px) {
  .page-faq .faq-tabs {
    padding: 26px 26px;
  }

  .page-faq .faq-tabs__panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }

  .page-faq .faq-cmp__col {
    padding-right: 28px;
  }

  .page-faq .faq-cmp__col::before {
    content: "";
    display: block;
    height: 0;
  }
}

/* ---------- 提交差异与截图规范 ---------- */

.page-faq .faq-shot__grid {
  display: grid;
  gap: 34px;
  margin-top: 28px;
}

.page-faq .faq-shot__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-faq .faq-shot__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .faq-shot__list li {
  position: relative;
  padding: 12px 0 12px 26px;
  border-top: 1px solid var(--surface-line-soft);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-faq .faq-shot__list li:last-child {
  border-bottom: 1px solid var(--surface-line-soft);
}

.page-faq .faq-shot__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 12px;
  height: 1px;
  background: var(--acid-cyan);
}

.page-faq .faq-shot__note {
  margin: 22px 0 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text-muted);
}

.page-faq .faq-shot__note a {
  font-family: var(--font-mono);
  color: var(--acid-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  word-break: break-all;
}

.page-faq .faq-shot__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

.page-faq .faq-shot__media {
  margin: 0;
}

.page-faq .faq-shot__media img {
  width: 100%;
  border-radius: var(--r-sm);
  border: 1px solid var(--surface-line-soft);
  object-fit: cover;
}

.page-faq .faq-shot__cap {
  margin-top: 12px;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--text-faint);
}

.page-faq .faq-shot__sketch {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 24px;
  border-radius: var(--r-sm);
  background: linear-gradient(160deg, rgba(20, 24, 29, 0.9), rgba(6, 10, 18, 0.55));
}

.page-faq .faq-shot__sketch .sk-frame {
  fill: none;
  stroke: var(--blueprint-line);
  stroke-width: 1;
}

.page-faq .faq-shot__sketch .sk-hot {
  fill: none;
  stroke: var(--orange-500);
  stroke-width: 1.2;
}

.page-faq .faq-shot__sketch .sk-key {
  fill: none;
  stroke: var(--acid-cyan);
  stroke-width: 1.2;
}

.page-faq .faq-shot__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 14px 0 0;
}

.page-faq .faq-shot__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-faint);
}

.page-faq .faq-shot__legend-item::before {
  content: "";
  width: 16px;
  height: 2px;
  border-radius: 2px;
  flex: 0 0 auto;
}

.page-faq .faq-shot__legend-item--hot::before {
  background: var(--orange-500);
}

.page-faq .faq-shot__legend-item--key::before {
  background: var(--acid-cyan);
}

@media (min-width: 900px) {
  .page-faq .faq-shot__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 60px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}