.page-faq {
  --faq-shadow: 4px 4px 0 rgba(36, 28, 23, 0.88);
  --faq-shadow-lg: 6px 6px 0 rgba(36, 28, 23, 0.9);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 28px) 0 40px;
  background: linear-gradient(180deg, var(--paper-deep) 0%, var(--paper) 72%);
  border-bottom: 3px solid var(--ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(201, 154, 46, 0.16) 0 1px,
    transparent 1px 16px
  );
}

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

.page-faq .breadcrumb {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: end;
}

.page-faq .faq-hero-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.page-faq .faq-vertical {
  display: none;
  color: var(--gold-dark);
  font-size: 12px;
  letter-spacing: 0.16em;
  margin: 4px 0 0;
  flex: 0 0 auto;
}

.page-faq .faq-hero-titlewrap {
  min-width: 0;
}

.page-faq .section-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--red);
}

.page-faq .faq-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 8vw, 58px);
  line-height: 1.14;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-title .hl {
  color: var(--red);
  position: relative;
}

.page-faq .faq-title .hl::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 8px;
  background: rgba(201, 154, 46, 0.4);
  z-index: -1;
}

.page-faq .faq-lede {
  margin: 20px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-faq .faq-hero-side {
  position: relative;
  background: var(--ink);
  color: var(--cream);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--red);
  padding: 22px 20px 20px;
}

.page-faq .faq-side-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-faq .faq-side-version {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-faq .faq-hero-side .gold-rule {
  margin: 16px 0 4px;
  border: 0;
  border-top: 1px solid rgba(201, 154, 46, 0.55);
}

.page-faq .faq-side-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(255, 251, 243, 0.88);
}

.page-faq .faq-side-list li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(201, 154, 46, 0.32);
}

.page-faq .faq-side-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-side-list .num {
  flex: 0 0 auto;
  min-width: 2.4ch;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--gold);
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  padding: 40px 0 64px;
}

.page-faq .faq-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

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

.page-faq .faq-rail-title {
  display: none;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-dark);
}

.page-faq .faq-tablist {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 0 0 8px;
  scrollbar-width: thin;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 11px 15px;
  background: var(--cream);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 rgba(36, 28, 23, 0.85);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.3;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease,
    box-shadow 160ms ease;
}

.page-faq .faq-tab:hover {
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(36, 28, 23, 0.85);
}

.page-faq .faq-tab-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gold-dark);
}

.page-faq .faq-tab-name {
  display: inline-block;
}

.page-faq .faq-rail-note {
  display: none;
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-strong);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 选中态 */
.page-faq #faq-tab-records:checked ~ .faq-layout .faq-tab[for="faq-tab-records"],
.page-faq #faq-tab-ranks:checked ~ .faq-layout .faq-tab[for="faq-tab-ranks"],
.page-faq #faq-tab-android:checked ~ .faq-layout .faq-tab[for="faq-tab-android"],
.page-faq #faq-tab-versions:checked ~ .faq-layout .faq-tab[for="faq-tab-versions"],
.page-faq #faq-tab-contact:checked ~ .faq-layout .faq-tab[for="faq-tab-contact"] {
  background: var(--red);
  color: #fff;
  border-color: var(--red-deep);
  box-shadow: 3px 3px 0 rgba(140, 26, 20, 0.55);
}

.page-faq #faq-tab-records:checked ~ .faq-layout .faq-tab[for="faq-tab-records"] .faq-tab-num,
.page-faq #faq-tab-ranks:checked ~ .faq-layout .faq-tab[for="faq-tab-ranks"] .faq-tab-num,
.page-faq #faq-tab-android:checked ~ .faq-layout .faq-tab[for="faq-tab-android"] .faq-tab-num,
.page-faq #faq-tab-versions:checked ~ .faq-layout .faq-tab[for="faq-tab-versions"] .faq-tab-num,
.page-faq #faq-tab-contact:checked ~ .faq-layout .faq-tab[for="faq-tab-contact"] .faq-tab-num {
  color: rgba(255, 251, 243, 0.75);
}

/* 键盘焦点 */
.page-faq #faq-tab-records:focus-visible ~ .faq-layout .faq-tab[for="faq-tab-records"],
.page-faq #faq-tab-ranks:focus-visible ~ .faq-layout .faq-tab[for="faq-tab-ranks"],
.page-faq #faq-tab-android:focus-visible ~ .faq-layout .faq-tab[for="faq-tab-android"],
.page-faq #faq-tab-versions:focus-visible ~ .faq-layout .faq-tab[for="faq-tab-versions"],
.page-faq #faq-tab-contact:focus-visible ~ .faq-layout .faq-tab[for="faq-tab-contact"] {
  outline: 3px solid var(--jade);
  outline-offset: 3px;
}

/* ---------- 面板 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-panel {
  display: none;
  animation: faq-panel-in 220ms ease both;
  min-width: 0;
}

@keyframes faq-panel-in {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq #faq-tab-records:checked ~ .faq-layout #faq-panel-records,
.page-faq #faq-tab-ranks:checked ~ .faq-layout #faq-panel-ranks,
.page-faq #faq-tab-android:checked ~ .faq-layout #faq-panel-android,
.page-faq #faq-tab-versions:checked ~ .faq-layout #faq-panel-versions,
.page-faq #faq-tab-contact:checked ~ .faq-layout #faq-panel-contact {
  display: block;
}

.page-faq .faq-panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-bottom: 14px;
  border-bottom: 3px solid var(--ink);
  margin-bottom: 20px;
}

.page-faq .faq-panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--ink);
}

.page-faq .faq-panel-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 46ch;
}

.page-faq .faq-panel-head .seal-tag {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
  padding: 8px;
  background: var(--cream);
  border: 2px solid var(--ink);
  box-shadow: var(--faq-shadow);
}

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

.page-faq .faq-figure figcaption {
  margin-top: 9px;
  padding: 8px 4px 2px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa-item {
  margin: 0 0 14px;
  background: var(--cream);
  border: 2px solid var(--ink);
  box-shadow: var(--faq-shadow);
  transition: box-shadow 180ms ease;
}

.page-faq .qa-item[open] {
  box-shadow: 6px 6px 0 rgba(179, 38, 30, 0.28);
}

.page-faq .qa-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  margin: 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

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

.page-faq .qa-item[open] .qa-q {
  color: var(--red-deep);
}

.page-faq .qa-index {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold-dark);
}

.page-faq .qa-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-mark {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  transition: transform 180ms ease, border-color 180ms ease;
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--gold-dark);
  transform: translate(-50%, -50%);
}

.page-faq .qa-mark::before {
  width: 9px;
  height: 2px;
}

.page-faq .qa-mark::after {
  width: 2px;
  height: 9px;
  transition: opacity 180ms ease;
}

.page-faq .qa-item[open] .qa-mark {
  border-color: var(--red);
  transform: rotate(180deg);
}

.page-faq .qa-item[open] .qa-mark::after {
  opacity: 0;
}

.page-faq .qa-item[open] .qa-mark::before,
.page-faq .qa-item[open] .qa-mark::after {
  background: var(--red);
}

.page-faq .qa-a {
  padding: 0 16px 18px;
  border-top: 1px solid var(--line);
  margin: 0 16px;
}

.page-faq .qa-a p {
  margin: 13px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-faq .qa-a .qa-note {
  display: block;
  padding: 8px 12px;
  background: var(--jade-light);
  border-left: 3px solid var(--jade);
  color: var(--jade);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 组尾按钮 ---------- */
.page-faq .faq-panel-more {
  margin: 22px 0 0;
}

.page-faq .faq-panel-more .btn {
  display: inline-block;
}

/* ---------- 页尾条 ---------- */
.page-faq .faq-tail {
  margin-top: 44px;
  padding: 26px 22px;
  background: var(--ink);
  color: var(--cream);
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 var(--gold);
}

.page-faq .faq-tail-text {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 251, 243, 0.9);
}

.page-faq .faq-tail-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-tail-actions .btn {
  display: inline-block;
}

.page-faq .faq-tail-legal {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(201, 154, 46, 0.4);
  font-size: 13px;
  color: rgba(255, 251, 243, 0.7);
}

.page-faq .faq-tail-legal a {
  color: var(--gold);
  text-decoration: none;
}

.page-faq .faq-tail-legal a:hover,
.page-faq .faq-tail-legal a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-tail-legal span {
  margin: 0 8px;
  color: rgba(201, 154, 46, 0.6);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 34px) 0 52px;
  }

  .page-faq .faq-body {
    padding: 52px 0 80px;
  }

  .page-faq .faq-title {
    font-size: clamp(38px, 5.4vw, 58px);
  }

  .page-faq .faq-lede {
    font-size: 17px;
  }

  .page-faq .faq-panel-title {
    font-size: 30px;
  }

  .page-faq .qa-q {
    padding: 17px 20px;
    font-size: 17px;
  }

  .page-faq .qa-a {
    padding: 0 20px 20px;
    margin: 0 20px;
  }

  .page-faq .qa-a p {
    font-size: 16px;
  }

  .page-faq .faq-figure {
    padding: 10px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 34px;
  }

  .page-faq .faq-vertical {
    display: block;
  }

  .page-faq .faq-hero-side {
    padding: 26px 24px 24px;
  }

  .page-faq .faq-side-version {
    font-size: 46px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 38px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-rail-title {
    display: block;
  }

  .page-faq .faq-rail-note {
    display: block;
  }

  .page-faq .faq-tablist {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-tab {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    padding: 13px 16px;
    white-space: normal;
  }

  .page-faq .faq-tail {
    margin-top: 56px;
    padding: 32px 30px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-layout {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 46px;
  }

  .page-faq .faq-lede {
    font-size: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-panel {
    animation: none;
  }

  .page-faq .faq-tab,
  .page-faq .qa-item,
  .page-faq .qa-mark,
  .page-faq .qa-mark::after {
    transition: none;
  }

  .page-faq .faq-tab:hover {
    transform: none;
  }
}