.page-faq {
  --faq-rule: rgba(13, 21, 38, 0.16);
  --faq-rule-strong: rgba(13, 21, 38, 0.32);
  --faq-num-col: 2.6rem;
  background: var(--paper);
  color: var(--ink-text);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink-800);
  color: var(--text-on-dark);
  padding: clamp(40px, 7vw, 88px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(42, 63, 99, 0.55) 1px, transparent 1px),
    linear-gradient(0deg, rgba(42, 63, 99, 0.32) 1px, transparent 1px);
  background-size: 84px 84px, 84px 84px;
  -webkit-mask-image: linear-gradient(120deg, #000 18%, transparent 76%);
  mask-image: linear-gradient(120deg, #000 18%, transparent 76%);
}

.page-faq .faq-hero__slice {
  position: absolute;
  top: 24%;
  right: -10%;
  width: 64%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--signal));
  transform: rotate(-11deg);
  pointer-events: none;
  opacity: 0.9;
}

.page-faq .faq-hero__slice--b {
  top: auto;
  bottom: 14%;
  right: auto;
  left: -6%;
  width: 46%;
  background: linear-gradient(90deg, var(--ice), transparent);
  opacity: 0.45;
}

.page-faq .faq-hero .breadcrumb {
  position: relative;
  color: var(--muted);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--text-on-dark);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
  margin-top: clamp(20px, 4vw, 44px);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 5.6vw, 60px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-on-dark);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 16.5px;
  line-height: 1.85;
  color: rgba(234, 240, 248, 0.86);
}

.page-faq .faq-hero__side {
  border-left: 1px solid var(--line);
  padding-left: clamp(16px, 2vw, 26px);
}

.page-faq .faq-hero__ruler {
  height: 16px;
  width: 100%;
  max-width: 220px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 12px);
  opacity: 0.9;
}

.page-faq .faq-hero__count {
  margin: 14px 0 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-hero__count .mono {
  font-size: 28px;
  font-weight: 600;
  color: var(--signal);
  margin-right: 6px;
  letter-spacing: 0;
}

.page-faq .faq-hero__note {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(234, 240, 248, 0.7);
  max-width: 26em;
}

/* ---------- 分组切换 ---------- */

.page-faq .faq-deck {
  padding: clamp(28px, 5vw, 60px) 0 clamp(56px, 8vw, 104px);
  background: var(--paper);
}

.page-faq .faq-tabs {
  display: flex;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
  border-bottom: 1px solid var(--faq-rule);
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-tabs::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  min-height: 48px;
  padding: 12px 14px 14px;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-text-2);
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-tab__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--ink-text);
  border-bottom-color: var(--signal);
}

.page-faq .faq-tab[aria-selected="true"] .faq-tab__num {
  color: var(--signal);
}

/* ---------- 面板 ---------- */

.page-faq .faq-panel {
  padding-top: clamp(26px, 4vw, 52px);
}

.page-faq .faq-panel[hidden],
.page-faq .faq-panel[aria-hidden="true"] {
  display: none;
}

.page-faq .faq-panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--faq-rule);
  margin-bottom: clamp(14px, 2vw, 24px);
}

.page-faq .faq-panel__title {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 34px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink-text);
}

.page-faq .faq-panel__ticks {
  align-self: center;
  width: 56px;
  height: 12px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 8px);
  opacity: 0.8;
}

.page-faq .faq-panel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ink-text-2);
}

.page-faq .faq-panel__body {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
  align-items: start;
}

/* ---------- 问答条目 ---------- */

.page-faq .faq-list {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

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

.page-faq .faq-q__head {
  display: grid;
  grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 18px;
  align-items: center;
  gap: 10px 12px;
  min-height: 56px;
  padding: 20px 2px;
  cursor: pointer;
  list-style: none;
  transition: transform 0.18s var(--ease);
}

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

.page-faq .faq-q__num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-q__text {
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-text);
  overflow-wrap: break-word;
}

.page-faq .faq-q__icon {
  position: relative;
  justify-self: end;
  width: 16px;
  height: 16px;
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-q__icon::before,
.page-faq .faq-q__icon::after {
  content: "";
  position: absolute;
  background: var(--ink-text-2);
  transition: background 0.2s var(--ease);
}

.page-faq .faq-q__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
}

.page-faq .faq-q__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
}

.page-faq .faq-q[open] .faq-q__icon {
  transform: rotate(45deg);
}

.page-faq .faq-q[open] .faq-q__icon::before,
.page-faq .faq-q[open] .faq-q__icon::after {
  background: var(--signal);
}

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

.page-faq .faq-q__body {
  padding: 0 0 22px calc(var(--faq-num-col) + 12px);
}

.page-faq .faq-q__body p {
  margin: 0;
  max-width: 62ch;
  padding: 18px 20px;
  background: var(--paper-2);
  border-left: 2px solid var(--signal);
  border-radius: 2px 16px 2px 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-text);
}

/* ---------- 侧栏 ---------- */

.page-faq .faq-side {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.page-faq .faq-side .figure {
  margin: 0;
}

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

.page-faq .faq-side__note {
  padding-top: 16px;
  border-top: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-side__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

.page-faq .faq-side__note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-text-2);
}

.page-faq .faq-side__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 6px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-text);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-rule-strong);
}

.page-faq .faq-side__link:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 联系区 ---------- */

.page-faq .faq-help {
  background: var(--ink-900);
  color: var(--text-on-dark);
  padding: clamp(44px, 7vw, 96px) 0 clamp(52px, 7vw, 96px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text-on-dark);
}

.page-faq .faq-help__text {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(234, 240, 248, 0.82);
}

.page-faq .faq-links {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin-top: 22px;
}

.page-faq .faq-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-on-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-links a:hover {
  color: var(--signal-soft);
  border-bottom-color: var(--signal-soft);
}

.page-faq .faq-help__item {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-help__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-faq .faq-help__value {
  margin: 0;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-on-dark);
  overflow-wrap: break-word;
}

.page-faq .faq-help__value--mono {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--signal-soft);
}

/* ---------- 响应式 ---------- */

@media (hover: hover) and (pointer: fine) {
  .page-faq .faq-q__head:hover {
    transform: translateX(4px);
  }
}

@media (min-width: 720px) {
  .page-faq .faq-q__text {
    font-size: 17.5px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-panel__body {
    grid-template-columns: minmax(0, 1fr) 292px;
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-tab {
    font-size: 15.5px;
    padding: 14px 18px 16px;
  }
}

@media (max-width: 899px) {
  .page-faq .faq-hero__side {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 20px;
  }

  .page-faq .faq-hero__note {
    max-width: none;
  }
}

@media (max-width: 599px) {
  .page-faq {
    --faq-num-col: 2.1rem;
  }

  .page-faq .faq-q__num {
    font-size: 11.5px;
  }

  .page-faq .faq-q__head {
    grid-template-columns: var(--faq-num-col) minmax(0, 1fr) 16px;
    gap: 8px;
    padding: 18px 0;
  }

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

  .page-faq .faq-q__body {
    padding: 0 0 20px calc(var(--faq-num-col) + 8px);
  }

  .page-faq .faq-q__body p {
    padding: 16px 16px;
    border-radius: 2px 12px 2px 12px;
  }

  .page-faq .faq-panel__ticks {
    width: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tab,
  .page-faq .faq-q__head,
  .page-faq .faq-q__icon,
  .page-faq .faq-q__icon::before,
  .page-faq .faq-q__icon::after,
  .page-faq .faq-links a {
    transition: none;
  }

  .page-faq .faq-q__head:hover {
    transform: none;
  }
}
<<<END>>>