.page-faq {
  --faq-diff: var(--amber);
}

.page-faq a {
  color: var(--cyan);
}

.page-faq .breadcrumb {
  padding-block: 18px 0;
}

/* ---------- 首屏 ---------- */
.page-faq__hero {
  padding-top: 8px;
}

.page-faq__hero-grid {
  display: grid;
  gap: 28px;
}

.page-faq__hero-copy h1 {
  margin: 10px 0 16px;
  font-size: clamp(2.05rem, 1.2rem + 3.8vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-faq__hero-copy .lede {
  max-width: 46ch;
}

.page-faq__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq__hero-panel {
  display: grid;
  gap: 16px;
  padding: 22px 20px;
  background:
    radial-gradient(120% 90% at 10% 0%, rgba(47, 243, 214, 0.08), transparent 60%),
    var(--panel);
  border: 1px solid var(--line);
}

.page-faq__hero-panel .panel__title {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq__ticks {
  width: 100%;
  height: 32px;
  color: var(--cyan);
  opacity: 0.5;
}

.page-faq__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq__stats .stat {
  display: grid;
  gap: 4px;
  padding: 14px 12px;
  background: var(--panel);
}

.page-faq__stats .stat__value {
  font-size: clamp(1.4rem, 1.1rem + 1vw, 1.9rem);
  line-height: 1;
}

.page-faq__stats .stat__label {
  font-size: 12px;
  line-height: 1.4;
  color: var(--muted);
}

.page-faq__hero-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 索引区 ---------- */
.page-faq__index {
  padding-top: 8px;
}

.page-faq .index-map {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .index-map__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  text-decoration: none;
  transition: border-color 220ms var(--ease), background 220ms var(--ease), transform 220ms var(--ease);
}

.page-faq .index-map__item:hover,
.page-faq .index-map__item:focus-visible {
  border-color: var(--cyan);
  background: #0c1c33;
  transform: translateY(-2px);
}

.page-faq .index-map__label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-faq .index-map__title {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
}

.page-faq .index-map__desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 常见问题 ---------- */
.page-faq__filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 22px 0 20px;
}

.page-faq__filter .filter-btn {
  padding: 7px 14px;
  font-size: 13px;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-faq__filter .filter-btn:hover,
.page-faq__filter .filter-btn:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
}

.page-faq__filter .filter-btn[aria-pressed="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 600;
}

.page-faq__filter .filter-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}

.page-faq__faq-list {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 220ms var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(47, 243, 214, 0.55);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-item__mark {
  flex: 0 0 auto;
  position: relative;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 1px;
  background: var(--cyan);
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 200ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item__a {
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
  border-top: none;
  padding-top: 0;
}

/* ---------- 版本对照 ---------- */
.page-faq__compare-media {
  margin: 0 0 20px;
}

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

.page-faq__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  align-items: center;
  margin-bottom: 20px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
}

.page-faq__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-faq__swatch {
  width: 14px;
  height: 14px;
  border-left: 3px solid var(--faq-diff);
  background: rgba(255, 194, 75, 0.12);
}

.page-faq__rows {
  display: grid;
  gap: 14px;
}

.page-faq .compare-row {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 220ms var(--ease);
}

.page-faq .compare-row--diff {
  border-left: 3px solid var(--faq-diff);
}

.page-faq .compare-row:hover,
.page-faq .compare-row:focus-within {
  border-color: rgba(47, 243, 214, 0.4);
}

.page-faq .compare-row__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .compare-row__no {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .compare-row__title {
  flex: 1 1 16ch;
  margin: 0;
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.page-faq .compare-row__body {
  display: grid;
}

.page-faq .compare-row__cell {
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.8;
  transition: background 220ms var(--ease);
}

.page-faq .compare-row__cell p {
  margin: 8px 0 0;
  color: var(--muted);
}

.page-faq .compare-row__ver {
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-faq .compare-row__cell--new .compare-row__ver {
  color: var(--cyan);
}

.page-faq .compare-row__cell--old .compare-row__ver {
  color: var(--muted);
}

.page-faq .compare-row:hover .compare-row__cell,
.page-faq .compare-row:focus-within .compare-row__cell {
  background: rgba(47, 243, 214, 0.05);
}

/* ---------- 操作步骤 ---------- */
.page-faq__steps-grid {
  display: grid;
  gap: 28px;
}

.page-faq .step-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  counter-reset: step;
}

.page-faq .step-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: border-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-faq .step-item:hover {
  border-color: rgba(47, 243, 214, 0.45);
  transform: translateY(-2px);
}

.page-faq .step-item__no {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 214, 0.07);
}

.page-faq .step-item__title {
  margin: 2px 0 6px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.page-faq .step-item__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq__steps-media {
  margin: 0;
}

/* ---------- 术语 ---------- */
.page-faq .terms {
  margin: 24px 0 0;
  border-top: 1px solid var(--line);
}

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

.page-faq .term__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.page-faq .term__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 联系 ---------- */
.page-faq__help {
  display: grid;
  gap: 18px;
}

.page-faq__help-panel {
  display: grid;
  gap: 14px;
  padding: 20px;
}

.page-faq__help-panel .panel__title {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

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

.page-faq .contact-item {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .contact-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.page-faq .contact-item__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .contact-item__value {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  word-break: break-word;
}

.page-faq .help-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .help-links a {
  font-weight: 600;
}

.page-faq__help-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

.page-faq__help-panel .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .index-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 44px;
  }

  .page-faq .compare-row__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-faq .compare-row__cell--old {
    border-left: 1px solid var(--line);
  }

  .page-faq .term {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 26px;
    align-items: baseline;
  }

  .page-faq__help {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-faq .index-map {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq__steps-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
    gap: 40px;
  }

  .page-faq__steps-media {
    position: sticky;
    top: 96px;
  }

  .page-faq__hero-panel {
    padding: 26px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .index-map__item,
  .page-faq .step-item,
  .page-faq .faq-item__mark::after,
  .page-faq .compare-row__cell,
  .page-faq .filter-btn {
    transition: none;
  }

  .page-faq .index-map__item:hover,
  .page-faq .step-item:hover {
    transform: none;
  }
}