.page-faq {
  --faq-gap: clamp(20px, 4vw, 56px);
  --faq-rule: 1px solid var(--line);
}

.page-faq .breadcrumbs {
  padding-top: clamp(14px, 2vw, 22px);
}

.page-faq .faq-hero {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 4vw, 52px) 0 clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 72px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-faq .faq-hero__hl {
  color: var(--cyan);
  box-shadow: inset 0 -0.12em 0 0 rgba(34, 224, 214, 0.28);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 4px 0 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-hero__meta li {
  padding-left: 10px;
  border-left: 2px solid var(--graphite);
}

.page-faq .faq-index__grid {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-index__intro h2 {
  margin: 10px 0 12px;
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-index__intro p {
  margin: 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

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

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

.page-faq .topic-band {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
}

.page-faq .topic-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 14px;
  border: var(--edge);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  box-shadow: var(--shadow-hard);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .topic-chip:hover,
.page-faq .topic-chip:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  outline: none;
}

.page-faq .topic-chip[data-active="true"] {
  border-color: var(--cyan);
  color: var(--cyan-hi);
}

.page-faq .topic-chip__num {
  font-size: 12px;
  color: var(--orange);
  flex: none;
}

.page-faq .topic-chip__label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-faq .topic-chip__count {
  margin-left: auto;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  flex: none;
}

.page-faq .faq-chapter__head {
  display: grid;
  gap: 8px;
  max-width: 46rem;
}

.page-faq .faq-chapter__head h2 {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.page-faq .faq-chapter__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-list {
  margin-top: clamp(20px, 3vw, 32px);
  border-top: 2px solid var(--graphite);
}

.page-faq .faq-item {
  border-bottom: var(--faq-rule);
  border-left: 2px solid transparent;
  padding-left: 14px;
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--red);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  color: var(--text);
}

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

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-item__num {
  flex: none;
  padding-top: 3px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-faq .faq-item__q {
  font-size: 15.5px;
  line-height: 1.55;
  font-weight: 600;
  transition: color 160ms var(--ease);
}

.page-faq .faq-item > summary:hover .faq-item__q {
  color: var(--cyan-hi);
}

.page-faq .faq-item__mark {
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.4;
  color: var(--muted);
}

.page-faq .faq-item__mark::after {
  content: "+";
}

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

.page-faq .faq-item[open] .faq-item__mark {
  color: var(--red);
}

.page-faq .faq-item__answer {
  padding: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-item__answer p {
  margin: 0;
  max-width: 30em;
}

/* 主题 04：四步自查 + 示意图 */
.page-faq .adapt-grid {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-faq .adapt-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .adapt-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  padding: 12px 0;
  border-top: var(--faq-rule);
}

.page-faq .adapt-steps li:last-child {
  border-bottom: var(--faq-rule);
}

.page-faq .adapt-steps__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
  padding-top: 3px;
}

.page-faq .adapt-steps__text {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-faq .adapt-steps__text strong {
  color: var(--text);
  font-weight: 700;
}

.page-faq .adapt-grid .figure {
  margin: 0;
}

/* 留白呼吸区 */
.page-faq .faq-breath {
  height: clamp(38px, 6vw, 84px);
  margin-top: clamp(24px, 4vw, 48px);
  border-top: var(--faq-rule);
  border-bottom: var(--faq-rule);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.42;
}

/* 主题 06：联系面板 */
.page-faq .support-panel {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 3.4vw, 40px);
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-faq .support-panel__title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--cyan-hi);
}

.page-faq .support-panel__text {
  margin: 0 0 14px;
  max-width: 30em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

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

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

.page-faq .support-row {
  display: grid;
  gap: 4px;
  padding-bottom: 10px;
  border-bottom: var(--faq-rule);
}

.page-faq .support-row__key {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-faq .support-row__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-faq .support-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 6px;
}

.page-faq .faq-next {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(26px, 4vw, 42px);
}

@media (min-width: 560px) {
  .page-faq .topic-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

  .page-faq .topic-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .adapt-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .support-panel {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
}

@media (min-width: 940px) {
  .page-faq .faq-item {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: clamp(24px, 3vw, 56px);
    align-items: start;
  }

  .page-faq .faq-item > summary {
    grid-column: 1;
    grid-row: 1;
    padding: 20px 0;
  }

  .page-faq .faq-item__answer {
    grid-column: 2;
    grid-row: 1;
    padding: 22px 0 22px clamp(20px, 2.4vw, 34px);
    border-left: var(--faq-rule);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic-chip,
  .page-faq .faq-item,
  .page-faq .faq-item__q {
    transition: none;
  }

  .page-faq .topic-chip:hover,
  .page-faq .topic-chip:focus-visible {
    transform: none;
  }
}