.page-faq {
  --faq-line: rgba(217, 205, 232, 0.9);
  --faq-shadow: 0 18px 40px -30px rgba(36, 22, 54, 0.55);
}

.page-faq .faq-stage {
  background:
    radial-gradient(900px 420px at 94% -6%, rgba(75, 46, 131, 0.10), transparent 62%),
    radial-gradient(720px 380px at -10% 38%, rgba(201, 162, 39, 0.11), transparent 64%),
    var(--cream);
  padding-block: clamp(24px, 4vw, 48px) clamp(56px, 8vw, 104px);
  border-end-start-radius: 48px;
  border-end-end-radius: 48px;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  gap: clamp(22px, 3vw, 38px);
  margin-top: clamp(22px, 3.4vw, 40px);
  padding-bottom: clamp(28px, 4vw, 52px);
  border-bottom: 1px solid var(--line-gold);
}

.page-faq .faq-hero-copy {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(0.98rem, 1.1vw, 1.08rem);
  line-height: 1.9;
  color: #4A4358;
}

.page-faq .faq-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
}

.page-faq .faq-hero-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-plate);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-faq .faq-hero-figure .figure-cap {
  padding: 12px 20px 14px;
  background: var(--ivory);
  color: var(--mauve);
  font-size: 0.82rem;
}

@media (min-width: 1000px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    align-items: center;
  }
}

/* ---------- 标签与切换 ---------- */

.page-faq .faq-board {
  position: relative;
  margin-top: clamp(28px, 4vw, 48px);
}

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

.page-faq .faq-tabbar {
  position: sticky;
  top: 0;
  z-index: 6;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 12px 2px 14px;
  margin-bottom: clamp(20px, 3vw, 32px);
  background: linear-gradient(180deg, var(--cream) 62%, rgba(247, 241, 228, 0));
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-tabbar label {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--ivory);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.page-faq .faq-tabbar label:hover {
  border-color: var(--line-gold-strong);
  color: var(--violet);
}

.page-faq .faq-tab-idx {
  font-size: 0.7rem;
  color: var(--mauve);
  letter-spacing: 0.06em;
}

.page-faq #faq-tab-rank:checked ~ .faq-tabbar [for="faq-tab-rank"],
.page-faq #faq-tab-sync:checked ~ .faq-tabbar [for="faq-tab-sync"],
.page-faq #faq-tab-install:checked ~ .faq-tabbar [for="faq-tab-install"],
.page-faq #faq-tab-service:checked ~ .faq-tabbar [for="faq-tab-service"],
.page-faq #faq-tab-update:checked ~ .faq-tabbar [for="faq-tab-update"] {
  border-color: var(--gold);
  background: linear-gradient(180deg, var(--ivory), var(--gold-soft));
  color: var(--violet);
  box-shadow: inset 0 0 0 1px rgba(201, 162, 39, 0.5), 0 10px 20px -14px rgba(75, 46, 131, 0.7);
}

.page-faq #faq-tab-rank:checked ~ .faq-tabbar [for="faq-tab-rank"] .faq-tab-idx,
.page-faq #faq-tab-sync:checked ~ .faq-tabbar [for="faq-tab-sync"] .faq-tab-idx,
.page-faq #faq-tab-install:checked ~ .faq-tabbar [for="faq-tab-install"] .faq-tab-idx,
.page-faq #faq-tab-service:checked ~ .faq-tabbar [for="faq-tab-service"] .faq-tab-idx,
.page-faq #faq-tab-update:checked ~ .faq-tabbar [for="faq-tab-update"] .faq-tab-idx {
  color: var(--vermilion);
}

/* ---------- 主体两列 ---------- */

.page-faq .faq-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 42px);
  align-items: start;
}

.page-faq .faq-panel {
  display: none;
}

.page-faq #faq-tab-rank:checked ~ .faq-main .faq-panel--rank,
.page-faq #faq-tab-sync:checked ~ .faq-main .faq-panel--sync,
.page-faq #faq-tab-install:checked ~ .faq-main .faq-panel--install,
.page-faq #faq-tab-service:checked ~ .faq-main .faq-panel--service,
.page-faq #faq-tab-update:checked ~ .faq-main .faq-panel--update {
  display: block;
}

/* ---------- 面板头部 ---------- */

.page-faq .faq-panel-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 2.4vw, 26px);
  padding-left: 18px;
  border-left: 3px solid var(--gold);
}

.page-faq .faq-panel-num {
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-faq .faq-panel-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.32rem, 2.6vw, 1.92rem);
  line-height: 1.3;
  color: var(--ink);
}

.page-faq .faq-panel-lead {
  margin: 0;
  max-width: 52ch;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mauve);
}

/* ---------- 折叠问答 ---------- */

.page-faq .faq-item {
  margin-bottom: 12px;
  border: 1px solid var(--faq-line);
  border-radius: var(--radius-md);
  background: var(--ivory);
  overflow: hidden;
  transition: border-color 0.22s ease, box-shadow 0.22s ease;
}

.page-faq .faq-item:hover {
  border-color: var(--line-gold-strong);
}

.page-faq .faq-item[open] {
  border-color: rgba(201, 162, 39, 0.62);
  border-left: 3px solid var(--vermilion);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 20px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1.12rem;
  line-height: 1;
  color: var(--gold);
  transition: color 0.2s ease;
}

.page-faq .faq-item[open] summary::after {
  content: "\2212";
  color: var(--vermilion);
}

.page-faq .faq-item[open] summary {
  color: var(--violet);
}

.page-faq .faq-answer {
  margin: 0 20px;
  padding: 15px 0 19px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-answer p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.92;
  color: #4A4358;
}

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

.page-faq .faq-answer b {
  font-weight: 600;
  color: var(--violet);
  letter-spacing: 0.01em;
}

.page-faq .faq-answer a {
  color: var(--turf);
  border-bottom: 1px solid rgba(47, 122, 107, 0.4);
  text-decoration: none;
}

.page-faq .faq-answer a:hover {
  border-bottom-color: var(--turf);
}

/* ---------- 面板内插图 ---------- */

.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 2.6vw, 28px);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 11 / 7;
  object-fit: cover;
}

.page-faq .faq-figure .figure-cap {
  padding: 11px 18px 13px;
  background: var(--ivory);
  color: var(--mauve);
  font-size: 0.8rem;
}

/* ---------- 侧边索引 ---------- */

.page-faq .faq-index {
  order: 2;
  padding-top: 6px;
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--gold);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 12px;
  border-left: 2px solid var(--line);
  font-size: 0.84rem;
  line-height: 1.5;
  color: var(--mauve);
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-faq .faq-index-item span {
  font-size: 0.7rem;
  color: var(--mauve);
}

.page-faq #faq-tab-rank:checked ~ .faq-main .faq-index-item[data-idx="rank"],
.page-faq #faq-tab-sync:checked ~ .faq-main .faq-index-item[data-idx="sync"],
.page-faq #faq-tab-install:checked ~ .faq-main .faq-index-item[data-idx="install"],
.page-faq #faq-tab-service:checked ~ .faq-main .faq-index-item[data-idx="service"],
.page-faq #faq-tab-update:checked ~ .faq-main .faq-index-item[data-idx="update"] {
  border-left-color: var(--gold);
  background: rgba(201, 162, 39, 0.09);
  color: var(--ink);
}

.page-faq #faq-tab-rank:checked ~ .faq-main .faq-index-item[data-idx="rank"] span,
.page-faq #faq-tab-sync:checked ~ .faq-main .faq-index-item[data-idx="sync"] span,
.page-faq #faq-tab-install:checked ~ .faq-main .faq-index-item[data-idx="install"] span,
.page-faq #faq-tab-service:checked ~ .faq-main .faq-index-item[data-idx="service"] span,
.page-faq #faq-tab-update:checked ~ .faq-main .faq-index-item[data-idx="update"] span {
  color: var(--vermilion);
}

.page-faq .faq-index-note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--mauve);
}

.page-faq .faq-index-note a {
  color: var(--violet);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold-strong);
}

.page-faq .faq-index-note a:hover {
  border-bottom-color: var(--violet);
}

/* ---------- 桌面布局 ---------- */

@media (min-width: 1080px) {
  .page-faq .faq-main {
    grid-template-columns: minmax(0, 1fr) 216px;
    gap: 52px;
  }

  .page-faq .faq-index {
    order: 0;
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-tabbar {
    padding-top: 6px;
  }

  .page-faq .faq-tabbar label {
    font-size: 0.9rem;
    padding: 11px 20px;
  }

  .page-faq .faq-item summary {
    font-size: 1.02rem;
    padding: 19px 24px;
  }

  .page-faq .faq-answer {
    margin: 0 24px;
    padding: 17px 0 22px;
  }
}

/* ---------- 窄屏收敛 ---------- */

@media (max-width: 560px) {
  .page-faq .faq-stage {
    border-end-start-radius: 28px;
    border-end-end-radius: 28px;
  }

  .page-faq .faq-panel-head {
    padding-left: 14px;
  }

  .page-faq .faq-item summary {
    padding: 15px 16px;
    font-size: 0.94rem;
    gap: 10px;
  }

  .page-faq .faq-answer {
    margin: 0 16px;
  }

  .page-faq .faq-tabbar label {
    padding: 9px 14px;
    font-size: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-tabbar label,
  .page-faq .faq-index-item,
  .page-faq .faq-item summary::after {
    transition: none;
  }
}