.page-faq {
  --faq-line: rgba(217, 160, 60, .3);
  --faq-line-soft: rgba(143, 163, 155, .26);
  --faq-text-dim: #C6C1B3;
  --faq-paper-ink: #23302A;
  background: var(--se-ink);
  color: var(--se-warm-white);
  font-family: var(--se-sans);
  font-size: var(--se-fs-16);
  line-height: 1.75;
}

.page-faq a {
  color: inherit;
  text-decoration: none;
}

.page-faq .page-shell {
  max-width: var(--se-maxw);
  margin: 0 auto;
  padding: 28px var(--se-gutter) 72px;
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  padding-bottom: 8px;
}

.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  font-size: var(--se-fs-12);
  color: var(--se-neutral);
  letter-spacing: .04em;
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--se-gold);
}

.page-faq .faq-chapter {
  margin: 0 0 10px;
  font-size: var(--se-fs-12);
  letter-spacing: .18em;
  color: var(--se-cinnabar);
}

.page-faq h1 {
  margin: 0 0 18px;
  max-width: 20em;
  font-family: var(--se-serif);
  font-weight: 800;
  font-size: clamp(28px, 6.2vw, 54px);
  line-height: 1.2;
  letter-spacing: .02em;
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 44em;
  color: var(--se-paper-deep);
  font-size: var(--se-fs-16);
}

.page-faq .faq-hero {
  margin: 26px 0 0;
  border: 1px solid var(--faq-line-soft);
  background: var(--se-ink-layer);
}

.page-faq .faq-hero img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 栅格 ---------- */
.page-faq .page-grid {
  margin-top: 34px;
}

.page-faq .faq-index {
  padding-top: 14px;
  margin-bottom: 30px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-size: var(--se-fs-12);
  letter-spacing: .22em;
  color: var(--se-neutral);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 11px;
  border: 1px solid var(--faq-line-soft);
  border-radius: 2px;
  font-size: var(--se-fs-14);
  color: var(--se-paper);
  transition: border-color 200ms var(--se-ease), color 200ms var(--se-ease);
}

.page-faq .faq-index__list a .mono {
  font-size: var(--se-fs-12);
  color: var(--se-gold);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible,
.page-faq .faq-index__list a[aria-current] {
  border-color: var(--se-cinnabar);
  color: var(--se-warm-white);
}

.page-faq .faq-index__note {
  margin: 16px 0 0;
  font-size: var(--se-fs-12);
  line-height: 1.9;
  color: var(--se-neutral);
}

.page-faq .faq-index__note .mono {
  color: var(--se-gold);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  margin-top: 44px;
}

.page-faq .faq-sec:first-child {
  margin-top: 0;
}

.page-faq .sec-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  margin-bottom: 20px;
}

.page-faq .sec-head .section-num {
  font-family: var(--se-mono);
  font-size: var(--se-fs-40);
  line-height: 1;
  color: var(--se-cinnabar);
  letter-spacing: .04em;
}

.page-faq .sec-head h2 {
  margin: 0;
  font-family: var(--se-serif);
  font-weight: 800;
  font-size: var(--se-fs-28);
  line-height: 1.3;
  letter-spacing: .02em;
}

.page-faq .sec-head p {
  margin: 6px 0 0;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

/* ---------- 症状卡 ---------- */
.page-faq .symptom-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .sym-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 18px 16px 22px;
  background: var(--se-ink-layer);
  border: 1px solid var(--faq-line-soft);
  border-left: 3px solid var(--se-cinnabar);
  border-radius: var(--se-radius);
  transition: transform 200ms var(--se-ease), border-color 200ms var(--se-ease), background 200ms var(--se-ease);
}

.page-faq .sym-card--b { border-left-color: var(--se-gold); }
.page-faq .sym-card--c { border-left-color: var(--se-blue); }
.page-faq .sym-card--d { border-left-color: var(--se-neutral); }

.page-faq .sym-card__mark {
  font-size: var(--se-fs-12);
  letter-spacing: .18em;
  color: var(--se-gold);
}

.page-faq .sym-card h3 {
  margin: 0;
  font-family: var(--se-serif);
  font-weight: 700;
  font-size: var(--se-fs-20);
  line-height: 1.35;
}

.page-faq .sym-card p {
  margin: 0;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

.page-faq .sym-card__go {
  margin-top: 4px;
  font-size: var(--se-fs-12);
  letter-spacing: .06em;
  color: var(--se-gold);
}

.page-faq .sym-card:hover,
.page-faq .sym-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--se-gold);
  background: #1B3025;
}

/* ---------- 折叠块 ---------- */
.page-faq .faq-item {
  background: var(--se-ink-layer);
  border: 1px solid var(--faq-line-soft);
  border-radius: var(--se-radius);
  overflow: hidden;
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--se-paper);
  color: var(--faq-paper-ink);
  transition: background 200ms var(--se-ease);
}

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

.page-faq .faq-item > summary:hover {
  background: var(--se-paper-deep);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--se-cinnabar);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  font-size: var(--se-fs-20);
  line-height: 1;
  color: var(--se-cinnabar);
}

.page-faq .faq-item__title {
  margin: 0;
  font-family: var(--se-serif);
  font-weight: 700;
  font-size: var(--se-fs-16);
  line-height: 1.4;
  letter-spacing: .02em;
  color: var(--faq-paper-ink);
}

.page-faq .faq-item__hint {
  display: none;
  font-size: var(--se-fs-12);
  color: #6B5C43;
  white-space: nowrap;
}

.page-faq .faq-item > summary::after {
  content: "+";
  font-family: var(--se-mono);
  font-size: var(--se-fs-20);
  line-height: 1;
  color: var(--se-cinnabar);
}

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

.page-faq .faq-item__body {
  padding: 20px 16px 22px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-intro {
  margin: 0 0 16px;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

.page-faq .faq-intro--tight {
  margin: 18px 0 0;
}

.page-faq .faq-next {
  margin: 16px 0 0;
  font-size: var(--se-fs-14);
  color: var(--se-paper-deep);
}

.page-faq .faq-next a {
  color: var(--se-gold);
  border-bottom: 1px solid var(--faq-line);
  padding-bottom: 1px;
}

.page-faq .faq-next a:hover,
.page-faq .faq-next a:focus-visible {
  color: var(--se-warm-white);
  border-bottom-color: var(--se-cinnabar);
}

.page-faq .rule-line {
  margin: 20px 0 0;
  height: 1px;
  background: var(--faq-line);
}

/* ---------- 三步清单 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .step-list > li {
  position: relative;
  padding: 0 0 22px 46px;
}

.page-faq .step-list > li:last-child {
  padding-bottom: 0;
}

.page-faq .step-list > li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 28px;
  bottom: 2px;
  width: 1px;
  background: var(--faq-line);
}

.page-faq .step-list > li:last-child::before {
  display: none;
}

.page-faq .step-list__no {
  position: absolute;
  left: 0;
  top: 0;
  width: 31px;
  padding: 2px 0;
  text-align: center;
  font-size: var(--se-fs-12);
  line-height: 1.5;
  color: var(--se-gold);
  background: var(--se-ink);
  border: 1px solid var(--faq-line);
  border-radius: 2px;
}

.page-faq .step-list h3 {
  margin: 2px 0 6px;
  font-family: var(--se-serif);
  font-weight: 700;
  font-size: var(--se-fs-16);
  line-height: 1.4;
}

.page-faq .step-list p {
  margin: 0;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

/* ---------- 房间清单 ---------- */
.page-faq .room-list {
  margin: 0;
  padding: 0;
}

.page-faq .room-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--faq-line-soft);
}

.page-faq .room-row:first-child {
  border-top: 1px dashed var(--faq-line-soft);
}

.page-faq .room-row dt {
  font-family: var(--se-serif);
  font-weight: 700;
  font-size: var(--se-fs-16);
  color: var(--se-gold);
  letter-spacing: .04em;
}

.page-faq .room-row dd {
  margin: 0;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

/* ---------- 下载原因 ---------- */
.page-faq .download-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-faq .cause-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .cause-list li {
  padding-left: 14px;
  border-left: 2px solid var(--se-blue);
}

.page-faq .cause-list h3 {
  margin: 0 0 4px;
  font-family: var(--se-serif);
  font-weight: 700;
  font-size: var(--se-fs-16);
  line-height: 1.4;
}

.page-faq .cause-list p {
  margin: 0;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--faq-line-soft);
  background: var(--se-coal);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 编号说明 ---------- */
.page-faq .num-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .num-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 16px;
  background: var(--se-coal);
  border: 1px solid var(--faq-line);
  border-radius: var(--se-radius);
}

.page-faq .num-list__code {
  font-size: var(--se-fs-20);
  line-height: 1.2;
  letter-spacing: .06em;
  color: var(--se-cinnabar);
}

.page-faq .num-list p {
  margin: 0;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

/* ---------- 反馈 ---------- */
.page-faq .faq-tpl {
  margin: 0;
  padding: 16px;
  font-family: var(--se-sans);
  font-size: var(--se-fs-14);
  line-height: 1.95;
  color: var(--se-warm-white);
  background: var(--se-coal);
  border: 1px dashed var(--faq-line);
  border-radius: var(--se-radius);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow-x: auto;
}

.page-faq .faq-contact {
  margin-top: 18px;
  padding: 16px;
  border-left: 3px solid var(--se-blue);
  background: var(--se-ink-layer);
}

.page-faq .faq-contact p {
  margin: 0 0 8px;
  font-size: var(--se-fs-14);
  overflow-wrap: anywhere;
}

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

.page-faq .faq-contact .mono {
  display: inline-block;
  min-width: 3.4em;
  margin-right: 10px;
  font-size: var(--se-fs-12);
  letter-spacing: .12em;
  color: var(--se-blue);
}

.page-faq .faq-contact a {
  color: var(--se-warm-white);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-contact a:hover,
.page-faq .faq-contact a:focus-visible {
  color: var(--se-gold);
  border-bottom-color: var(--se-gold);
}

.page-faq .faq-contact .faq-contact__note {
  margin-top: 10px;
  font-size: var(--se-fs-12);
  line-height: 1.9;
  color: var(--se-neutral);
}

.page-faq .flow-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .flow-list li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  font-size: var(--se-fs-14);
  color: var(--faq-text-dim);
}

.page-faq .flow-list .mono {
  font-size: var(--se-fs-12);
  color: var(--se-gold);
  padding-top: 4px;
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-faq .page-shell {
    padding: 40px var(--se-gutter) 88px;
  }

  .page-faq .faq-item__hint {
    display: inline;
  }

  .page-faq .faq-item > summary {
    padding: 16px 22px;
    gap: 16px;
  }

  .page-faq .faq-item__title {
    font-size: var(--se-fs-20);
  }

  .page-faq .faq-item__body {
    padding: 24px 22px 26px;
  }

  .page-faq .sec-head {
    grid-template-columns: 84px minmax(0, 1fr);
    column-gap: 20px;
    align-items: start;
  }

  .page-faq .sec-head .section-num {
    grid-row: span 2;
    font-size: var(--se-fs-64);
  }

  .page-faq .symptom-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 14px;
  }

  .page-faq .sym-card--a,
  .page-faq .sym-card--d {
    grid-column: span 7;
  }

  .page-faq .sym-card--b,
  .page-faq .sym-card--c {
    grid-column: span 5;
  }

  .page-faq .room-row {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
    padding: 13px 0;
  }

  .page-faq .download-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 26px;
    align-items: start;
  }

  .page-faq .num-list li {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 18px;
    align-items: baseline;
  }

  .page-faq .num-list__code {
    font-size: var(--se-fs-28);
  }

  .page-faq .faq-tpl,
  .page-faq .faq-contact {
    padding: 20px 22px;
  }
}

@media (min-width: 1080px) {
  .page-faq .page-grid {
    display: grid;
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
    margin-top: 42px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--se-header-h) + 24px);
    margin-bottom: 0;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-faq .faq-index__list a {
    display: grid;
    grid-template-columns: 26px minmax(0, 1fr);
    width: 100%;
    padding: 8px 6px 8px 9px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible,
  .page-faq .faq-index__list a[aria-current] {
    border-left-color: var(--se-cinnabar);
    background: var(--se-ink-layer);
  }

  .page-faq .faq-sec {
    margin-top: 56px;
  }

  .page-faq .faq-sec:first-child {
    margin-top: 0;
  }

  .page-faq .sec-head h2 {
    font-size: var(--se-fs-40);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .sym-card,
  .page-faq .faq-item > summary,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .sym-card:hover,
  .page-faq .sym-card:focus-visible {
    transform: none;
  }
}