.page-faq {
  --faq-indent: 24px;
  --faq-flow: 44px;
  padding-block: 28px 88px;
}

.page-faq .faq-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--faq-flow);
}

/* 焦点反馈 */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 2px;
}

/* 首屏声明 */
.page-faq .faq-head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 24px;
}

.page-faq .faq-head .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--violet);
}

.page-faq .faq-head h1 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
  max-width: 22em;
}

.page-faq .faq-head .lede {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 38em;
}

/* 分组索引条 */
.page-faq .faq-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.page-faq .faq-index::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-index::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex: none;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 120ms var(--ease), border-color 120ms var(--ease), background-color 120ms var(--ease);
}

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-faq .faq-index-link:hover {
  border-color: var(--signal);
  color: var(--text);
}

.page-faq .faq-index-link[aria-current="true"],
.page-faq .faq-index-link.is-current {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--on-amber);
}

.page-faq .faq-index-link[aria-current="true"] .faq-index-num,
.page-faq .faq-index-link.is-current .faq-index-num {
  color: var(--on-amber);
}

/* 分组画板 */
.page-faq .faq-group {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-faq .faq-group-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-group-head .panel-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--signal);
}

.page-faq .faq-group-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 34em;
}

.page-faq .faq-marginal {
  display: none;
}

/* 图形 */
.page-faq .faq-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  background: var(--panel);
  object-fit: cover;
}

.page-faq .faq-figure--wide img {
  aspect-ratio: 880 / 260;
}

.page-faq .faq-figure .media-caption {
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* 问答列表 */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item > .faq-q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
  transition: color 120ms var(--ease), padding-left 120ms var(--ease);
}

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

.page-faq .faq-item > .faq-q:hover {
  color: var(--haze);
  padding-left: 6px;
}

.page-faq .faq-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--violet);
  transition: color 120ms var(--ease);
}

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

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

.page-faq .faq-a {
  padding: 0 2px 20px var(--faq-indent);
  border-left: 1px solid var(--line);
  margin-left: 2px;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 40em;
}

.page-faq .faq-a a {
  color: var(--signal);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  color: var(--text);
  letter-spacing: 0.02em;
}

.page-faq kbd {
  display: inline-block;
  padding: 1px 6px;
  border: 1px solid var(--line);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
}

.page-faq .faq-tiers {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
}

.page-faq .faq-tier {
  padding: 4px 10px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* 筛选分组的分栏 */
.page-faq .faq-split {
  align-items: start;
}

.page-faq .faq-split > * {
  min-width: 0;
}

.page-faq .faq-split-side {
  border-left: 1px solid var(--line);
  padding-left: 0;
}

/* 出口面板 */
.page-faq .faq-exit {
  padding: 26px 20px 30px;
  color: var(--on-amber);
  position: relative;
}

.page-faq .faq-exit .panel-num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: #8a4a1c;
}

.page-faq .faq-exit h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.3;
  color: var(--on-amber);
}

.page-faq .faq-exit-lede {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.7;
  color: #3a3f47;
  max-width: 36em;
}

.page-faq .faq-contact {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0 0 24px;
  border-top: 1px solid rgba(16, 24, 32, 0.22);
}

.page-faq .faq-contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(16, 24, 32, 0.22);
}

.page-faq .faq-contact-item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: #6a5138;
}

.page-faq .faq-contact-item .faq-contact-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--on-amber);
  word-break: break-all;
}

.page-faq .faq-contact-item .faq-contact-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: #4a5058;
}

.page-faq .faq-exit-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* 窄屏保护 */
@media (max-width: 899px) {
  .page-faq .faq-split-side {
    border-left: 0;
  }

  .page-faq .faq-a {
    padding-bottom: 18px;
  }
}

/* 桌面端节奏 */
@media (min-width: 900px) {
  .page-faq .faq-head h1 {
    font-size: 40px;
    line-height: 1.18;
  }

  .page-faq .faq-head .lede {
    font-size: 16px;
  }

  .page-faq .faq-group-head h2 {
    font-size: 26px;
  }

  .page-faq .faq-item > .faq-q {
    font-size: 19px;
    padding: 22px 2px;
  }

  .page-faq .faq-exit {
    padding: 36px 40px 40px;
  }

  .page-faq .faq-exit h2 {
    font-size: 26px;
  }

  .page-faq .faq-contact-item {
    flex-direction: row;
    align-items: baseline;
    gap: 20px;
  }

  .page-faq .faq-contact-item dt {
    flex: none;
    width: 108px;
  }

  .page-faq .faq-contact-item .faq-contact-note {
    flex: 1 1 100%;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-group {
    padding-left: 56px;
  }

  .page-faq .faq-marginal {
    display: block;
    position: absolute;
    left: 0;
    top: 6px;
    margin: 0;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.22em;
    color: var(--line);
    transition: color 120ms var(--ease), transform 120ms var(--ease);
  }

  .page-faq .faq-group:hover .faq-marginal {
    color: var(--violet);
    transform: rotate(180deg) translateY(-6px);
  }

  .page-faq .faq-split-side {
    padding-left: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .faq-item > .faq-q,
  .page-faq .faq-num,
  .page-faq .faq-marginal {
    transition: none;
  }

  .page-faq .faq-item > .faq-q:hover {
    padding-left: 2px;
  }

  .page-faq .faq-group:hover .faq-marginal {
    transform: rotate(180deg);
  }
}