.page-faq {
  --faq-card-gap: 18px;
  --faq-measure: 68ch;
  --faq-aside-w: 268px;
  --faq-depth: 6px 6px 0 rgba(154, 166, 188, 0.22);
  background: var(--c-ink);
  color: var(--c-white);
  overflow-x: hidden;
}

.page-faq .container {
  width: 100%;
}

.page-faq .section {
  padding: 60px 0;
}

.page-faq .section-head {
  margin-bottom: 30px;
}

.page-faq .section-title {
  color: var(--c-white);
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--c-gold);
  margin: 0 0 10px;
}

.page-faq .lede {
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--c-white-70);
  max-width: var(--faq-measure);
  margin: 14px 0 0;
}

.page-faq .faq-note {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--c-gold);
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--c-white-70);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 34px 0 52px;
  border-bottom: 1px solid var(--c-silver-22);
  background:
    radial-gradient(130% 150% at 90% -12%, rgba(224, 163, 60, 0.14), transparent 56%),
    linear-gradient(180deg, var(--c-ink-mid), var(--c-ink) 82%);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--c-silver-22) 0 1px, transparent 1px 88px);
  opacity: 0.55;
  pointer-events: none;
}

.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}

.page-faq .crumbs {
  margin-bottom: 26px;
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
  max-width: 19ch;
}

.page-faq .faq-lede {
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--c-white-88);
  max-width: 58ch;
  margin: 0 0 26px;
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.page-faq .faq-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  max-width: 520px;
  border: 1px solid var(--c-silver-22);
  background: var(--c-silver-22);
}

.page-faq .faq-hero-stats > div {
  background: var(--c-ink);
  padding: 13px 14px;
}

.page-faq .faq-hero-stats dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-silver);
  margin-bottom: 8px;
}

.page-faq .faq-hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
}

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-hero-figure .figure-frame {
  border: 3px solid var(--c-ink-deep);
  background: var(--c-ink-mid);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.42);
  overflow: hidden;
}

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

.page-faq .figure-caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--c-white-52);
}

/* ---------- 六类场景 ---------- */
.page-faq .faq-scenes {
  background: var(--c-ink);
  border-bottom: 1px solid var(--c-silver-22);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-silver-22);
}

.page-faq .filter-btn {
  appearance: none;
  border: 1px solid var(--c-silver-40);
  background: transparent;
  color: var(--c-white-70);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  padding: 7px 14px;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease, border-color 120ms ease;
}

.page-faq .filter-btn:hover,
.page-faq .filter-btn:focus-visible {
  color: var(--c-white);
  border-color: var(--c-gold);
  outline: none;
}

.page-faq .filter-btn.is-active,
.page-faq .filter-btn[aria-pressed="true"] {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-ink-deep);
}

.page-faq .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--c-silver);
}

.page-faq .faq-scene-list {
  display: grid;
  gap: var(--faq-card-gap);
}

.page-faq .faq-scene-card {
  background: var(--c-paper);
  color: var(--c-ink-deep);
  border: 3px solid var(--c-ink-deep);
  box-shadow: var(--faq-depth);
  padding: 20px 20px 22px;
}

.page-faq .faq-scene-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.page-faq .faq-scene-top .u-label {
  color: rgba(28, 23, 18, 0.58);
}

.page-faq .faq-scene-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--c-ink-deep);
}

.page-faq .faq-scene-desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-inktext-72);
  margin: 0 0 16px;
}

.page-faq .faq-scene-meta {
  margin: 0;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-scene-meta > div {
  display: grid;
  grid-template-columns: minmax(0, 8ch) minmax(0, 1fr);
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-scene-meta > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-scene-meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(28, 23, 18, 0.55);
  padding-top: 3px;
}

.page-faq .faq-scene-meta dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--c-ink-deep);
}

.page-faq .faq-scene-meta .u-mono {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
}

/* ---------- 保养周期 ---------- */
.page-faq .faq-care {
  background: var(--c-paper);
  color: var(--c-ink-deep);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-care .eyebrow {
  color: var(--c-orange);
}

.page-faq .faq-care .section-title {
  color: var(--c-ink-deep);
}

.page-faq .faq-care .lede {
  color: var(--c-inktext-72);
}

.page-faq .faq-care-grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-care-visual {
  display: grid;
  gap: 18px;
}

.page-faq .faq-care-figure {
  margin: 0;
}

.page-faq .faq-care-figure .figure-frame {
  border: 3px solid var(--c-ink-deep);
  background: var(--c-ink-mid);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
}

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

.page-faq .faq-care-figure .figure-caption {
  color: var(--c-inktext-72);
}

.page-faq .faq-rings {
  width: 150px;
  height: 150px;
  justify-self: end;
  opacity: 0.9;
}

.page-faq .faq-care-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: carestep;
  border-top: 3px solid var(--c-ink-deep);
}

.page-faq .faq-care-steps > li {
  position: relative;
  padding: 20px 0 20px 50px;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-care-steps > li::before {
  counter-increment: carestep;
  content: counter(carestep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 21px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-orange);
}

.page-faq .faq-care-name {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--c-ink-deep);
}

.page-faq .faq-care-scope {
  font-size: var(--fs-14);
  line-height: 1.78;
  margin: 0 0 8px;
  color: var(--c-inktext-72);
}

.page-faq .faq-care-trigger {
  font-size: var(--fs-14);
  line-height: 1.78;
  margin: 0;
  color: var(--c-ink-deep);
}

.page-faq .faq-care-trigger .u-label {
  display: inline-block;
  margin-right: 6px;
  color: var(--c-orange);
}

/* ---------- 条款核对 ---------- */
.page-faq .faq-checklist {
  background: var(--c-ink-mid);
  border-bottom: 1px solid var(--c-silver-22);
}

.page-faq .faq-check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-silver-22);
  border: 1px solid var(--c-silver-22);
}

.page-faq .faq-check-list > li {
  display: grid;
  gap: 8px;
  align-content: start;
  background: var(--c-ink-mid);
  padding: 22px 20px;
}

.page-faq .faq-check-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--c-gold);
}

.page-faq .faq-check-title {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.32;
  margin: 0;
  color: var(--c-white);
}

.page-faq .faq-check-body {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--c-white-70);
}

/* ---------- 问答 + 术语 ---------- */
.page-faq .faq-qa {
  background: var(--c-paper);
  color: var(--c-ink-deep);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-qa .eyebrow {
  color: var(--c-orange);
}

.page-faq .faq-qa .section-title {
  color: var(--c-ink-deep);
}

.page-faq .faq-qa .lede {
  color: var(--c-inktext-72);
}

.page-faq .faq-qa-layout {
  display: grid;
  gap: 34px;
}

.page-faq .faq-group {
  margin-bottom: 30px;
}

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

.page-faq .faq-group-title {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--c-orange);
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--c-ink-deep);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-item > summary {
  list-style: none;
  display: block;
  position: relative;
  cursor: pointer;
  padding: 15px 34px 15px 46px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.62;
  color: var(--c-ink-deep);
  transition: color 120ms ease;
}

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

.page-faq .faq-item > summary::before {
  content: attr(data-q);
  position: absolute;
  left: 0;
  top: 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-orange);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 12px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-inktext-72);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--c-orange);
  outline: none;
}

.page-faq .faq-item-body {
  margin: 0 0 16px 14px;
  padding: 2px 0 2px 18px;
  border-left: 2px solid var(--c-gold);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-inktext-72);
}

.page-faq .faq-glossary-title {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--c-ink-deep);
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--c-ink-deep);
}

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

.page-faq .faq-glossary > div {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-glossary > div:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-glossary dt {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 15px;
  color: var(--c-ink-deep);
  margin-bottom: 6px;
}

.page-faq .faq-glossary dt::before {
  content: "§";
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--c-orange);
}

.page-faq .faq-glossary dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.78;
  color: var(--c-inktext-72);
}

/* ---------- 人工确认 ---------- */
.page-faq .faq-manual {
  background: var(--c-ink);
}

.page-faq .faq-manual-grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-manual-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-manual-list li {
  position: relative;
  padding: 13px 0 13px 24px;
  border-bottom: 1px solid var(--c-silver-22);
  font-size: 15px;
  line-height: 1.76;
  color: var(--c-white-88);
}

.page-faq .faq-manual-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  color: var(--c-silver);
}

.page-faq .faq-manual-note {
  border: 3px solid var(--c-gold);
  background: rgba(224, 163, 60, 0.08);
  padding: 24px 22px;
}

.page-faq .faq-manual-note h3 {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.35;
  margin: 0 0 14px;
  color: var(--c-gold);
}

.page-faq .faq-manual-note ol {
  margin: 0 0 18px;
  padding-left: 20px;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-white-88);
}

.page-faq .faq-manual-note li {
  margin-bottom: 6px;
}

.page-faq .faq-manual-mail {
  display: block;
  padding-top: 14px;
  border-top: 1px solid var(--c-silver-40);
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.02em;
  color: var(--c-white);
  word-break: break-all;
}

.page-faq .faq-manual-meta {
  margin: 10px 0 0;
  font-size: var(--fs-12);
  line-height: 1.75;
  color: var(--c-white-52);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-scene-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-faq .faq-scene-list > .faq-scene-card:nth-child(even) {
    margin-top: 42px;
  }
}

@media (min-width: 900px) {
  .page-faq .section {
    padding: 84px 0;
  }

  .page-faq .faq-hero {
    padding: 44px 0 70px;
  }

  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 1.38fr) minmax(0, 1fr);
    gap: 46px;
    align-items: end;
  }

  .page-faq .faq-lede {
    font-size: var(--fs-16);
  }

  .page-faq .section-head--split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 30ch);
    gap: 44px;
    align-items: end;
  }

  .page-faq .faq-care-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .faq-manual-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-check-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-qa-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-aside-w);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-qa-aside {
    position: sticky;
    top: 104px;
    align-self: start;
  }
}

@media (max-width: 420px) {
  .page-faq .faq-hero-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-scene-meta > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 3px;
  }

  .page-faq .faq-scene-meta dt {
    padding-top: 0;
  }

  .page-faq .faq-item > summary {
    padding-right: 26px;
  }

  .page-faq .filter-count {
    margin-left: 0;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .filter-btn,
  .page-faq .faq-item > summary {
    transition: none;
  }
}