.page-faq {
  --faq-panel: rgba(6, 26, 20, 0.6);
  --faq-panel-open: rgba(6, 26, 20, 0.94);
  --faq-wash: rgba(246, 248, 244, 0.045);
  --faq-neon-wash: rgba(203, 242, 76, 0.08);
  background-color: var(--pitch);
  color: var(--cold);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: 20px;
  padding-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cold-52);
}

.page-faq .faq-crumb a {
  color: var(--cold-70);
  text-decoration: none;
  border-bottom: 2px solid var(--neon);
  transition: color var(--dur) var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background-color: var(--pitch-deep);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(246, 248, 244, 0.045) 0 1px,
    transparent 1px 52px
  );
  border-top: var(--bw) solid var(--line-cold);
  border-bottom: var(--bw) solid var(--line-cold);
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: 32px;
  padding-bottom: 36px;
}

.page-faq .faq-hero__lead h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--cold);
}

.page-faq .faq-hero__text {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cold-70);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq .faq-hero__panel {
  border: var(--bw) solid var(--line-cold-strong);
  background-color: var(--faq-panel);
  box-shadow: var(--shadow-hard);
  padding: 18px;
}

.page-faq .faq-hero__panel-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-faq .faq-version {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--line-cold);
}

.page-faq .faq-version__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: baseline;
  gap: 12px;
  padding: 12px;
  background-color: var(--pitch-deep);
}

.page-faq .faq-version__label {
  font-size: 14px;
  color: var(--cold-70);
}

.page-faq .faq-version__num {
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
}

.page-faq .faq-version__size {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--cold-52);
}

.page-faq .faq-hero__panel-note {
  margin: 14px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--cold-52);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-top: 32px;
  padding-bottom: 60px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cold-52);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 12px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--cold-70);
  text-decoration: none;
  border: 2px solid var(--line-cold-strong);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
  background-color: var(--faq-neon-wash);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
}

/* ---------- 章节头 ---------- */
.page-faq .faq-group {
  margin-bottom: 52px;
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: var(--bw) solid var(--line-cold-strong);
}

.page-faq .faq-group__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 44px;
  line-height: 0.88;
  letter-spacing: -0.04em;
  color: var(--line-cold-strong);
  transition: color var(--dur) var(--ease);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-faq .faq-group__num {
    color: transparent;
    -webkit-text-stroke: 2px var(--line-cold-strong);
    transition: -webkit-text-stroke-color var(--dur) var(--ease);
  }

  .page-faq .faq-group.is-current .faq-group__num {
    -webkit-text-stroke-color: var(--neon);
  }
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--cold);
}

.page-faq .faq-group__lead {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cold-70);
}

/* ---------- 图片 ---------- */
.page-faq .media-frame {
  margin: 24px 0;
}

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

/* ---------- 三步排查 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.page-faq .faq-step {
  background-color: var(--faq-wash);
  border-left: var(--bw) solid var(--neon);
  padding: 16px 18px;
}

.page-faq .faq-step__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  font-variant-numeric: tabular-nums;
  color: var(--neon);
}

.page-faq .faq-step__title {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--cold);
}

.page-faq .faq-step__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cold-70);
}

.page-faq .faq-step__cue {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-cold-strong);
  font-size: 13px;
  line-height: 1.75;
  color: var(--cold-52);
}

.page-faq .faq-step__cue span {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--pitch-deep);
  background-color: var(--neon);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-qs {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.page-faq .faq-q {
  border: var(--bw) solid var(--line-cold-strong);
  background-color: var(--faq-panel);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-q[open] {
  border-color: var(--neon-40);
  background-color: var(--faq-panel-open);
}

.page-faq .faq-q__summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--cold);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-q__summary:hover {
  color: var(--neon);
}

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

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 2px solid var(--neon);
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background-color: var(--neon);
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-q__mark::before {
  left: 3px;
  right: 3px;
  top: 6px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  top: 3px;
  bottom: 3px;
  left: 6px;
  width: 2px;
}

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

.page-faq .faq-q__body {
  padding: 0 16px 16px 46px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cold-70);
}

.page-faq .faq-q__body p {
  margin: 0 0 10px;
}

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

/* ---------- 对照表 ---------- */
.page-faq .faq-table__title {
  margin: 30px 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon);
}

.page-faq .faq-table__caption {
  caption-side: top;
  padding-bottom: 8px;
  text-align: left;
  font-size: 12px;
  color: var(--cold-52);
}

.page-faq .faq-table__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--cold-52);
}

/* ---------- 节奏时间轴 ---------- */
.page-faq .faq-events {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-event {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 16px;
  background-color: var(--faq-wash);
  border-left: var(--bw) solid var(--teal);
}

.page-faq .faq-event__time {
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--neon);
}

.page-faq .faq-event__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cold-70);
}

/* ---------- 反馈区 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 24px;
}

.page-faq .faq-help__panel {
  border: var(--bw) solid var(--line-cold-strong);
  background-color: var(--faq-wash);
  padding: 18px;
}

.page-faq .faq-help__panel--contact {
  border-color: var(--neon-40);
  background-color: var(--faq-panel-open);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-help__panel-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--cold);
}

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

.page-faq .faq-help__list li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cold-70);
}

.page-faq .faq-help__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--neon);
}

.page-faq .faq-help__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-cold-strong);
  font-size: 12px;
  line-height: 1.7;
  color: var(--cold-52);
}

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

.page-faq .faq-contact__line {
  display: grid;
  gap: 4px;
}

.page-faq .faq-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cold-52);
}

.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  word-break: break-word;
  color: var(--cold);
}

.page-faq .faq-contact__note {
  margin: 14px 0 16px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--cold-52);
}

.page-faq .faq-help__tail {
  margin: 24px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cold-70);
}

/* ---------- 桌面 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-hero__inner {
    padding-top: 46px;
    padding-bottom: 50px;
  }

  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2px;
  }

  .page-faq .faq-event {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-faq .faq-help {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-q__summary {
    padding: 16px 20px;
  }

  .page-faq .faq-q__body {
    padding: 0 20px 18px 52px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
    padding-top: 56px;
    padding-bottom: 62px;
  }

  .page-faq .faq-body {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 52px;
    padding-top: 40px;
    padding-bottom: 76px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list a {
    border: 0;
    border-left: 3px solid transparent;
    padding: 10px 12px;
    white-space: normal;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--neon);
    background-color: var(--faq-neon-wash);
  }

  .page-faq .faq-group {
    margin-bottom: 66px;
  }

  .page-faq .faq-group__head {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 22px;
    padding-bottom: 20px;
  }

  .page-faq .faq-group__num {
    font-size: 72px;
  }

  .page-faq .faq-group__lead {
    font-size: 15px;
  }

  .page-faq .faq-steps {
    margin-top: 4px;
  }

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

  .page-faq .faq-help {
    grid-template-columns: 7fr 5fr;
    gap: 24px;
  }

  .page-faq .faq-help__panel {
    padding: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}