.page-faq {
  --faq-body: #3B4650;
  --faq-quiet: #6B747C;
  --faq-soft: #E7ECF1;
  --faq-dark-line: rgba(198, 206, 214, 0.28);
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-faq .wrap {
  max-width: var(--wide);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  padding-top: clamp(1rem, 2.5vw, 1.75rem);
  padding-bottom: 0.6rem;
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.6rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.8125rem;
  color: var(--faq-quiet);
}

.page-faq .breadcrumb-list li {
  display: inline-flex;
  align-items: center;
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 0.6rem;
  color: var(--line);
}

.page-faq .breadcrumb-list a {
  color: var(--blue-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 140ms var(--ease);
}

.page-faq .breadcrumb-list a:hover,
.page-faq .breadcrumb-list a:focus-visible {
  border-bottom-color: var(--blue-light);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--deep);
  color: var(--text-inv);
  padding: clamp(2.25rem, 6vw, 4.75rem) 0 clamp(2.25rem, 6vw, 4.25rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(198, 206, 214, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(198, 206, 214, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -32%;
  right: -14%;
  width: 54%;
  height: 165%;
  z-index: -1;
  background: var(--blue);
  transform: rotate(11deg);
  pointer-events: none;
}

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

.page-faq .faq-hero-main {
  display: grid;
  gap: clamp(0.9rem, 1.8vw, 1.4rem);
  max-width: 44rem;
}

.page-faq .faq-hero .eyebrow {
  margin: 0;
  color: rgba(247, 248, 250, 0.62);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: 0.01em;
}

.page-faq .faq-hero .lead {
  margin: 0;
  max-width: 40rem;
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.78;
  color: rgba(247, 248, 250, 0.82);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  margin-top: 0.4rem;
  border-top: 1px solid var(--faq-dark-line);
  border-bottom: 1px solid var(--faq-dark-line);
}

.page-faq .faq-hero-meta span {
  padding: 0.7rem 1.1rem 0.7rem 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: rgba(247, 248, 250, 0.74);
}

.page-faq .faq-hero-meta span + span {
  padding-left: 1.1rem;
  border-left: 1px solid var(--faq-dark-line);
}

.page-faq .vertical-note {
  display: none;
  position: absolute;
  right: clamp(0.75rem, 3vw, 2.25rem);
  top: 50%;
  transform: translateY(-50%);
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.4em;
  color: rgba(247, 248, 250, 0.5);
}

/* ---------- 快速定位索引 ---------- */
.page-faq .faq-index {
  padding: clamp(2.25rem, 5vw, 3.75rem) 0 clamp(0.5rem, 2vw, 1.25rem);
}

.page-faq .section-head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: clamp(1.25rem, 2.5vw, 2rem);
}

.page-faq .section-head .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq h2.display {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: 0.01em;
}

.page-faq .faq-index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-index-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-height: 13.5rem;
  padding: 1.5rem 1.35rem 1.25rem;
  background: #FFFFFF;
  color: var(--text);
  text-decoration: none;
  border-top: 4px solid var(--blue-light);
  transition: background 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-index-card--auth {
  border-top-color: var(--indigo);
}

.page-faq .faq-index-card--spec {
  border-top-color: var(--wine);
}

.page-faq .faq-index-card:hover,
.page-faq .faq-index-card:focus-visible {
  background: var(--faq-soft);
}

.page-faq .faq-index-card:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

.page-faq .faq-index-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--faq-quiet);
}

.page-faq .faq-index-title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  font-weight: 800;
  line-height: 1.35;
}

.page-faq .faq-index-desc {
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--faq-body);
}

.page-faq .faq-index-count {
  margin-top: auto;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--blue-light);
}

/* ---------- 图形 ---------- */
.page-faq .faq-figure {
  margin: clamp(1.75rem, 3.5vw, 3rem) auto 0;
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-figure--spec {
  margin-top: clamp(1.75rem, 3.5vw, 2.75rem);
}

.page-faq .faq-figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--faq-soft);
}

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

.page-faq .faq-figure .media-caption {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--faq-quiet);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding: clamp(2.25rem, 5vw, 4rem) 0 0;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.85rem 1.1rem;
  align-items: start;
  padding-bottom: clamp(1.1rem, 2.2vw, 1.6rem);
  margin-bottom: 0.25rem;
  border-bottom: 2px solid var(--deep);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
}

.page-faq .faq-group-sub {
  margin: 0.4rem 0 0;
  max-width: 46rem;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--faq-quiet);
}

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

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

.page-faq .faq-item {
  display: block;
}

.page-faq .faq-q {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem 0.85rem;
  align-items: baseline;
  padding: 1.05rem 0.25rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: clamp(0.95rem, 1.7vw, 1.0625rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--text);
  transition: color 140ms var(--ease);
}

.page-faq .faq-q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q::marker {
  content: "";
}

.page-faq .faq-q:hover {
  color: var(--blue-light);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
}

.page-faq .faq-q::after {
  content: "";
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--blue-light);
  border-bottom: 2px solid var(--blue-light);
  transform: rotate(45deg);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease);
}

.page-faq .faq-item[open] .faq-q::after {
  transform: rotate(-135deg);
  border-color: var(--signal);
}

.page-faq .faq-q-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--faq-quiet);
}

.page-faq .faq-item[open] .faq-q-num {
  color: var(--signal);
}

.page-faq .faq-a {
  padding: 0 0.25rem 1.5rem 1.05rem;
  margin-left: 0.15rem;
  border-left: 1px solid var(--line);
}

.page-faq .faq-a p {
  margin: 0 0 0.7rem;
  font-size: clamp(0.875rem, 1.5vw, 0.9375rem);
  line-height: 1.82;
  color: var(--faq-body);
}

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

.page-faq .faq-a a {
  color: var(--blue-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 111, 168, 0.35);
  transition: border-color 140ms var(--ease);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  border-bottom-color: var(--blue-light);
}

.page-faq .field {
  display: inline-block;
  padding: 0.08em 0.42em;
  background: var(--faq-soft);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--deep);
  white-space: nowrap;
}

/* ---------- 准备清单 ---------- */
.page-faq .faq-checklist {
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(2.25rem, 5vw, 3.75rem) 0;
  background: var(--teal);
  color: var(--text-inv);
}

.page-faq .faq-checklist-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: clamp(1.25rem, 2.5vw, 1.9rem);
}

.page-faq .faq-checklist-head .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-checklist h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  font-weight: 800;
  line-height: 1.22;
  color: var(--text-inv);
}

.page-faq .faq-checklist-lead {
  margin: 0;
  max-width: 44rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(247, 248, 250, 0.78);
}

.page-faq .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(247, 248, 250, 0.16);
  border: 1px solid rgba(247, 248, 250, 0.16);
}

.page-faq .check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  background: var(--teal);
  cursor: pointer;
  transition: background 140ms var(--ease);
}

.page-faq .check-item:hover {
  background: #113F48;
}

.page-faq .check-box {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  position: relative;
  border: 2px solid rgba(247, 248, 250, 0.6);
  background: transparent;
  cursor: pointer;
  transition: background 140ms var(--ease), border-color 140ms var(--ease);
}

.page-faq .check-box:checked {
  background: var(--signal);
  border-color: var(--signal);
}

.page-faq .check-box:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 6px;
  height: 11px;
  border-right: 2px solid #FFFFFF;
  border-bottom: 2px solid #FFFFFF;
  transform: rotate(40deg);
}

.page-faq .check-box:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-faq .check-body {
  display: grid;
  gap: 0.28rem;
}

.page-faq .check-title {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--text-inv);
}

.page-faq .check-desc {
  font-size: 0.845rem;
  line-height: 1.72;
  color: rgba(247, 248, 250, 0.76);
}

/* ---------- 收束 ---------- */
.page-faq .faq-cta {
  padding: clamp(2rem, 4.5vw, 3.5rem) 0 clamp(3rem, 6vw, 4.5rem);
}

.page-faq .faq-cta-inner {
  display: grid;
  gap: 1.4rem;
  padding-top: clamp(1.5rem, 3vw, 2.25rem);
  border-top: 2px solid var(--deep);
}

.page-faq .faq-cta-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 800;
  line-height: 1.3;
}

.page-faq .faq-cta-text {
  margin: 0;
  max-width: 46rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--faq-body);
}

.page-faq .faq-cta-text a {
  color: var(--blue-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 111, 168, 0.35);
}

.page-faq .faq-cta-text a:hover,
.page-faq .faq-cta-text a:focus-visible {
  border-bottom-color: var(--blue-light);
}

.page-faq .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background 140ms var(--ease), color 140ms var(--ease), border-color 140ms var(--ease);
}

.page-faq .btn-primary {
  background: var(--signal);
  color: #FFFFFF;
  border-color: var(--signal);
}

.page-faq .btn-primary:hover,
.page-faq .btn-primary:focus-visible {
  background: #E05D00;
  border-color: #E05D00;
}

.page-faq .btn-ghost {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}

.page-faq .btn-ghost:hover,
.page-faq .btn-ghost:focus-visible {
  background: var(--blue);
  color: var(--text-inv);
}

.page-faq .btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-index-grid {
    grid-template-columns: 1.1fr 1fr 0.72fr;
  }

  .page-faq .faq-a {
    padding-left: 3.4rem;
  }

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

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

@media (min-width: 900px) {
  .page-faq .vertical-note {
    display: block;
  }

  .page-faq .faq-hero-main {
    max-width: 41rem;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-group-head {
    gap: 1.4rem 2rem;
  }

  .page-faq .faq-q {
    padding: 1.15rem 0.5rem;
  }

  .page-faq .faq-a {
    padding-left: 0.5rem 0.5rem 1.6rem 3.9rem;
    padding: 0 0.5rem 1.6rem 3.9rem;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-hero-meta span {
    padding: 0.55rem 0.85rem 0.55rem 0;
    font-size: 0.72rem;
  }

  .page-faq .faq-hero-meta span + span {
    padding-left: 0.85rem;
  }

  .page-faq .faq-q {
    grid-template-columns: auto 1fr;
  }

  .page-faq .faq-q::after {
    display: none;
  }
}