.page-faq {
  --faq-rule: var(--line-600);
  --faq-pad: 64px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 44px 0 36px;
  border-bottom: 1px solid var(--line-600);
  overflow: hidden;
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.14;
  background-image:
    linear-gradient(var(--line-600) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-600) 1px, transparent 1px);
  background-size: 120px 120px;
}

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

.page-faq .faq-hero__title {
  margin: 16px 0 22px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.6rem, 13vw, 5.4rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--mist-200);
}

.page-faq .faq-hero__title-sub {
  display: block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: clamp(0.64rem, 2.8vw, 0.78rem);
  font-weight: 600;
  letter-spacing: 0.2em;
  line-height: 1.6;
  color: var(--gold-500);
}

.page-faq .faq-hero__lead {
  max-width: 68ch;
  margin: 0;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
}

/* 主题快速切换 */
.page-faq .faq-jump {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--line-600);
  background: var(--line-600);
}

.page-faq .faq-jump__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 14px;
  background: var(--ink-900);
  color: var(--mist-200);
  text-decoration: none;
  transition: background 240ms var(--ease), color 240ms var(--ease);
}

.page-faq .faq-jump__item:hover,
.page-faq .faq-jump__item:focus-visible {
  background: var(--ink-700);
  color: var(--gold-300);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--gold-500);
}

.page-faq .faq-jump__label {
  font-size: 0.88rem;
}

/* ---------- 通用章节部件 ---------- */
.page-faq .faq-section {
  padding: var(--faq-pad) 0;
  scroll-margin-top: calc(var(--head-h) + 20px);
}

.page-faq .faq-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-600);
  margin-bottom: 28px;
}

.page-faq .faq-head__main {
  min-width: 0;
}

.page-faq .faq-head__index {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--mist-400);
}

.page-faq .faq-intro {
  max-width: 70ch;
  margin: 0 0 26px;
  color: var(--mist-200);
}

.page-faq .faq-link {
  color: var(--jade-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 191, 159, 0.4);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--gold-300);
  border-bottom-color: var(--gold-300);
}

.page-faq .faq-figure {
  margin: 0 0 26px;
  width: 100%;
}

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

/* ---------- 01 高频问题 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 26px;
}

.page-faq .faq-index {
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  padding: 14px 14px 6px;
}

.page-faq .faq-index__group + .faq-index__group {
  margin-top: 16px;
}

.page-faq .faq-index__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--jade-400);
}

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

.page-faq .faq-index__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 6px;
  border-left: 1px solid transparent;
  color: var(--mist-400);
  text-decoration: none;
  font-size: 0.86rem;
  line-height: 1.5;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--gold-300);
  border-left-color: var(--magenta-500);
  background: var(--ink-700);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--gold-500);
  flex: 0 0 auto;
}

.page-faq .faq-index__text {
  min-width: 0;
}

.page-faq .qa-list {
  display: block;
}

.page-faq .qa {
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  transition: border-color 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 10px;
}

.page-faq .qa:hover,
.page-faq .qa:focus-within {
  border-color: var(--line-600);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

.page-faq .qa:target {
  border-color: var(--magenta-500);
  box-shadow: inset 0 0 0 1px rgba(224, 69, 123, 0.25);
}

.page-faq .qa__summary {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) 14px;
  gap: 12px;
  align-items: start;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--mist-200);
  font-size: 0.95rem;
  line-height: 1.6;
}

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

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--magenta-500);
  outline-offset: -2px;
}

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--gold-500);
  padding-top: 4px;
}

.page-faq .qa__title {
  min-width: 0;
}

.page-faq .qa__mark {
  position: relative;
  width: 13px;
  height: 13px;
  margin-top: 6px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--mist-400);
  transition: transform 240ms var(--ease), background 240ms var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1px;
}

.page-faq .qa__mark::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--gold-500);
}

.page-faq .qa__body {
  padding: 0 16px 18px;
}

.page-faq .qa__basis {
  margin: 0;
  padding-left: 12px;
  border-left: 1px solid var(--gold-500);
  color: var(--mist-400);
  font-size: 0.84rem;
  line-height: 1.8;
}

/* ---------- 02 V3 改设置 ---------- */
.page-faq .faq-setup-grid {
  display: grid;
  gap: 26px;
}

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

.page-faq .step {
  position: relative;
  padding: 0 0 26px 46px;
}

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

.page-faq .step::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--gold-500);
  opacity: 0.55;
}

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

.page-faq .step__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border: 1px solid var(--gold-500);
  border-radius: 50%;
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--gold-300);
}

.page-faq .step__title {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--mist-200);
}

.page-faq .step__text {
  margin: 0;
  max-width: 60ch;
  color: var(--mist-400);
  font-size: 0.88rem;
  line-height: 1.8;
}

.page-faq .prereq {
  align-self: start;
  padding: 20px 18px;
  border: 1px solid var(--line-600);
  border-top: 1px solid var(--gold-500);
  background: var(--ink-700);
}

.page-faq .prereq__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold-500);
}

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

.page-faq .prereq__list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 9px;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--mist-200);
}

.page-faq .prereq__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--jade-400);
}

.page-faq .prereq__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-600);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--mist-400);
}

/* ---------- 03 记录与分类 ---------- */
.page-faq .paths {
  display: grid;
  gap: 12px;
}

.page-faq .path {
  padding: 18px 16px;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  transition: border-color 240ms var(--ease);
}

.page-faq .path:hover {
  border-color: var(--jade-400);
}

.page-faq .path__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--jade-400);
}

.page-faq .path__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--mist-200);
}

.page-faq .path__text {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-faq .faq-note {
  margin-top: 22px;
  border: 1px solid var(--line-600);
  border-left: 2px solid var(--gold-500);
  background: var(--ink-900);
  padding: 6px 16px;
}

.page-faq .faq-note__line {
  margin: 12px 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-faq .faq-note__key {
  display: inline-block;
  min-width: 54px;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--gold-300);
}

/* ---------- 04 档位 ---------- */
.page-faq .faq-scale {
  display: block;
  width: 100%;
  height: 26px;
  margin-bottom: 18px;
}

.page-faq .tier {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  border: 1px solid var(--line-600);
  background: var(--ink-700);
  scroll-snap-align: start;
}

.page-faq .tier__code {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gold-500);
  font-variant-numeric: tabular-nums;
}

.page-faq .tier__name {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--mist-200);
}

.page-faq .tier__text {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-faq .faq-advice {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line-600);
}

.page-faq .faq-advice__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--mist-400);
}

.page-faq .faq-advice__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-advice__list li {
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--mist-200);
}

.page-faq .faq-advice__k {
  display: inline-block;
  margin-right: 10px;
  padding: 1px 8px;
  border: 1px solid var(--line-600);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--jade-400);
}

/* ---------- 05 结算与积分 ---------- */
.page-faq .flow {
  display: grid;
  gap: 14px;
}

.page-faq .flow__node {
  position: relative;
  padding: 20px 16px 18px;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
}

.page-faq .flow__node::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 46px;
  height: 1px;
  background: var(--jade-400);
}

.page-faq .flow__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--jade-400);
}

.page-faq .flow__title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--mist-200);
}

.page-faq .flow__text {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-faq .settle-notes {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .settle-note {
  padding: 16px 16px 18px;
  border: 1px solid var(--line-600);
  background: var(--ink-900);
}

.page-faq .settle-note__title {
  margin: 0 0 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--gold-300);
}

.page-faq .settle-note__text {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--mist-400);
}

/* ---------- 06 术语索引 ---------- */
.page-faq .terms-grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-figure--square {
  margin: 0;
  max-width: 420px;
}

.page-faq .terms {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .term {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 12px 14px;
  border: 1px solid var(--line-600);
  background: var(--ink-800);
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}

.page-faq .term:hover {
  border-color: var(--gold-500);
  background: var(--ink-700);
}

.page-faq .term__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--mist-400);
  padding-top: 5px;
}

.page-faq .term__key {
  position: relative;
  padding-left: 14px;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--mist-200);
}

.page-faq .term__key::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 1px;
  background: var(--jade-400);
}

.page-faq .term__def {
  grid-column: 2;
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-faq .faq-terms__foot {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-600);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--mist-400);
  max-width: 70ch;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 20px;
  border: 1px solid var(--line-600);
  border-left: 2px solid var(--magenta-500);
  background: var(--ink-800);
}

.page-faq .faq-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist-200);
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq {
    --faq-pad: 88px;
  }

  .page-faq .faq-hero {
    padding: 64px 0 52px;
  }

  .page-faq .faq-jump {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-head {
    margin-bottom: 34px;
  }

  .page-faq .faq-setup-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .settle-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .term {
    grid-template-columns: 30px 104px minmax(0, 1fr);
    align-items: baseline;
  }

  .page-faq .term__def {
    grid-column: 3;
  }

  .page-faq .qa__body {
    padding: 0 16px 20px 58px;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --faq-pad: 108px;
  }

  .page-faq .faq-split {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--head-h) + 24px);
  }

  .page-faq .terms-grid {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-faq .faq-figure--square {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__mark::after,
  .page-faq .qa__mark::before,
  .page-faq .faq-jump__item,
  .page-faq .faq-index__link,
  .page-faq .term,
  .page-faq .qa {
    transition: none;
  }

  .page-faq .qa[open] .qa__mark::after {
    transform: none;
    opacity: 0;
  }
}