.page-faq {
  --faq-accent: var(--ob-neon-green);
  --faq-orange-accent: var(--ob-orange);
  --faq-item-bg: rgba(255, 255, 255, 0.045);
  --faq-item-border: rgba(255, 255, 255, 0.13);
  --faq-text-dim: rgba(248, 249, 250, 0.78);
  background: var(--ob-deep-blue);
  color: var(--ob-soft-white);
  overflow-x: hidden;
}

/* ===== Hero 区域 ===== */
.page-faq .ob-faq-hero {
  position: relative;
  padding-top: 1.5rem;
  padding-bottom: 0;
  background:
    radial-gradient(ellipse at 88% 18%, rgba(57, 255, 20, 0.14), transparent 52%),
    linear-gradient(135deg, rgba(57, 255, 20, 0.06) 0%, transparent 60%),
    var(--ob-deep-blue);
}

.page-faq .ob-faq-hero .ob-breadcrumb {
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
}

.page-faq .ob-faq-hero-grid {
  display: grid;
  gap: 1.5rem;
  padding-bottom: 2rem;
}

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

.page-faq .ob-faq-hero-copy .ob-section-kicker {
  color: var(--faq-accent);
  font-family: var(--ob-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.page-faq .ob-faq-hero-copy .ob-page-title {
  font-size: clamp(2rem, 6vw, 3.25rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0.625rem 0 0.875rem;
  color: var(--ob-soft-white);
}

.page-faq .ob-faq-hero-copy .ob-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--faq-text-dim);
  max-width: 38rem;
}

.page-faq .ob-faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-top: 1.25rem;
}

.page-faq .ob-faq-hero-visual {
  margin-top: 0.25rem;
}

.page-faq .ob-faq-hero-visual img,
.page-faq .ob-sync-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--ob-radius);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
}

/* ===== 主题索引 ===== */
.page-faq .ob-faq-index {
  border-top: 1px solid rgba(248, 249, 250, 0.08);
  border-bottom: 1px solid rgba(248, 249, 250, 0.08);
  margin-top: 0.5rem;
}

.page-faq .ob-faq-index .ob-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-bottom: 1.5rem;
}

.page-faq .ob-faq-topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.75rem;
  padding-bottom: 0.25rem;
}

.page-faq .ob-faq-topic {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.125rem;
  border-radius: var(--ob-radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--faq-item-border);
  color: var(--ob-soft-white);
  text-decoration: none;
  transition: border-color 0.25s ease, transform 0.25s ease, background 0.25s ease;
}

.page-faq .ob-faq-topic:hover {
  border-color: var(--faq-accent);
  transform: translateY(-3px);
  background: rgba(57, 255, 20, 0.07);
}

.page-faq .ob-faq-topic--orange:hover {
  border-color: var(--faq-orange-accent);
  background: rgba(255, 107, 0, 0.08);
}

.page-faq .ob-faq-topic--teal:hover {
  border-color: var(--ob-teal);
  background: rgba(42, 157, 143, 0.1);
}

.page-faq .ob-faq-topic-num {
  font-family: var(--ob-font-mono);
  font-size: 0.75rem;
  color: var(--faq-accent);
  letter-spacing: 0.06em;
}

.page-faq .ob-faq-topic--orange .ob-faq-topic-num {
  color: var(--faq-orange-accent);
}

.page-faq .ob-faq-topic--teal .ob-faq-topic-num {
  color: var(--ob-teal);
}

.page-faq .ob-faq-topic-name {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.35;
}

.page-faq .ob-faq-topic-desc {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--faq-text-dim);
}

/* ===== FAQ 区块通用 ===== */
.page-faq .ob-faq-block {
  position: relative;
  padding-top: 3rem;
  padding-bottom: 3rem;
}

.page-faq .ob-faq-block .ob-section-head {
  margin-bottom: 1.5rem;
}

.page-faq .ob-faq-block .ob-section-title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0.5rem;
  color: var(--ob-soft-white);
}

.page-faq .ob-faq-block .ob-section-desc {
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--faq-text-dim);
  max-width: 40rem;
}

.page-faq .ob-faq-block--wine {
  background:
    linear-gradient(155deg, rgba(155, 34, 38, 0.38) 0%, transparent 65%),
    var(--ob-deep-blue);
  border-top: 1px solid rgba(155, 34, 38, 0.45);
  border-bottom: 1px solid rgba(155, 34, 38, 0.45);
}

.page-faq .ob-faq-block--wine .ob-section-title {
  color: var(--ob-soft-white);
}

.page-faq .ob-faq-block--teal {
  background:
    linear-gradient(155deg, rgba(42, 157, 143, 0.24) 0%, transparent 65%),
    var(--ob-deep-blue);
  border-top: 1px solid rgba(42, 157, 143, 0.45);
  border-bottom: 1px solid rgba(42, 157, 143, 0.45);
}

.page-faq .ob-faq-block--teal .ob-section-title {
  color: var(--ob-soft-white);
}

/* ===== FAQ 手风琴 ===== */
.page-faq .ob-faq-list {
  display: grid;
  gap: 0.75rem;
}

.page-faq .ob-faq-item {
  border-radius: var(--ob-radius-sm);
  background: var(--faq-item-bg);
  border: 1px solid var(--faq-item-border);
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-faq .ob-faq-item:hover {
  border-color: rgba(57, 255, 20, 0.35);
  transform: translateX(4px);
}

.page-faq .ob-faq-item[open] {
  border-color: rgba(57, 255, 20, 0.45);
  background: rgba(57, 255, 20, 0.05);
}

.page-faq .ob-faq-block--wine .ob-faq-item[open] {
  border-color: rgba(255, 107, 0, 0.45);
  background: rgba(255, 107, 0, 0.05);
}

.page-faq .ob-faq-block--teal .ob-faq-item[open] {
  border-color: rgba(42, 157, 143, 0.55);
  background: rgba(42, 157, 143, 0.07);
}

.page-faq .ob-faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.0625rem 1.125rem;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ob-soft-white);
}

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

.page-faq .ob-faq-item summary::after {
  content: '+';
  flex-shrink: 0;
  font-size: 1.375rem;
  font-weight: 400;
  line-height: 1;
  color: var(--faq-accent);
  transition: transform 0.35s ease;
}

.page-faq .ob-faq-block--wine .ob-faq-item summary::after {
  color: var(--faq-orange-accent);
}

.page-faq .ob-faq-item[open] summary::after {
  transform: rotate(45deg);
}

.page-faq .ob-faq-item .ob-faq-body {
  padding: 0 1.125rem 1.125rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--faq-text-dim);
}

.page-faq .ob-faq-item[open] .ob-faq-body {
  animation: obFaqFade 0.35s ease;
}

.page-faq .ob-faq-item .ob-faq-body ul {
  margin: 0.375rem 0 0;
  padding-left: 1.125rem;
  display: grid;
  gap: 0.375rem;
}

.page-faq .ob-faq-item .ob-faq-body li::marker {
  color: var(--faq-accent);
}

/* ===== 换设备流程 ===== */
.page-faq .ob-sync-path {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: 0.5rem;
  margin: 1.75rem 0 1.25rem;
  padding: 1.25rem;
  border-radius: var(--ob-radius);
  background:
    linear-gradient(120deg, rgba(57, 255, 20, 0.1) 0%, transparent 60%),
    rgba(255, 255, 255, 0.02);
  border: 1px dashed rgba(57, 255, 20, 0.3);
}

.page-faq .ob-sync-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  padding: 0.875rem 0.75rem;
  min-width: 0;
  border-radius: var(--ob-radius-sm);
  background: rgba(11, 31, 58, 0.72);
  border: 1px solid rgba(57, 255, 20, 0.2);
}

.page-faq .ob-sync-step p {
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ob-soft-white);
  margin: 0;
}

.page-faq .ob-sync-num {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--faq-accent);
  color: var(--ob-deep-blue);
  font-weight: 900;
  font-size: 0.875rem;
  line-height: 1;
}

.page-faq .ob-sync-arrow {
  display: grid;
  place-items: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--faq-accent);
}

.page-faq .ob-sync-img {
  margin-bottom: 1.5rem;
}

/* ===== 版本适配表格 ===== */
.page-faq .ob-version-table {
  margin: 0 0 1.5rem;
  overflow-x: auto;
  border-radius: var(--ob-radius-sm);
  border: 1px solid var(--faq-item-border);
  background: rgba(11, 31, 58, 0.55);
}

.page-faq .ob-version-table table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 0.9rem;
  color: var(--ob-soft-white);
}

.page-faq .ob-version-table th,
.page-faq .ob-version-table td {
  padding: 0.8125rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-faq .ob-version-table tr:last-child td {
  border-bottom: none;
}

.page-faq .ob-version-table th {
  background: rgba(57, 255, 20, 0.12);
  font-weight: 800;
  letter-spacing: 0.03em;
  font-size: 0.8125rem;
  color: var(--ob-soft-white);
}

.page-faq .ob-version-table td:first-child {
  font-family: var(--ob-font-mono);
  font-weight: 700;
}

.page-faq .ob-version-table td:nth-child(2) {
  color: var(--faq-accent);
  font-weight: 700;
}

.page-faq .ob-version-table td:last-child {
  text-align: right;
  color: var(--faq-text-dim);
  font-size: 0.8125rem;
}

/* ===== 支持卡片 ===== */
.page-faq .ob-faq-support {
  padding-top: 2.5rem;
  padding-bottom: 2.5rem;
}

.page-faq .ob-faq-support-card {
  display: grid;
  gap: 1.25rem;
  padding: 1.75rem 1.5rem;
  border-radius: var(--ob-radius);
}

.page-faq .ob-faq-support-copy .ob-section-kicker {
  font-family: var(--ob-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ob-deep-blue);
}

.page-faq .ob-faq-support-copy .ob-section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  color: var(--ob-deep-blue);
  margin: 0.375rem 0 0.375rem;
}

.page-faq .ob-faq-support-copy .ob-section-desc {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(11, 31, 58, 0.72);
  max-width: 36rem;
  margin: 0;
}

.page-faq .ob-faq-support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.page-faq .ob-faq-support-meta {
  display: grid;
  gap: 0.375rem;
  padding-top: 0.5rem;
  border-top: 1px solid rgba(11, 31, 58, 0.12);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: rgba(11, 31, 58, 0.68);
}

.page-faq .ob-faq-support-meta p {
  margin: 0;
}

.page-faq .ob-faq-support-meta a {
  color: var(--ob-deep-blue);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ===== 动效 ===== */
@keyframes obFaqFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 桌面端适配 ===== */
@media (min-width: 768px) {
  .page-faq .ob-faq-hero {
    padding-top: 2.5rem;
  }

  .page-faq .ob-faq-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 2.5rem;
    padding-bottom: 3rem;
  }

  .page-faq .ob-faq-hero-visual img {
    max-height: 340px;
  }

  .page-faq .ob-faq-hero-actions {
    gap: 0.75rem;
  }

  .page-faq .ob-faq-topic-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
  }

  .page-faq .ob-faq-topic {
    padding: 1.375rem 1.25rem;
  }

  .page-faq .ob-faq-block {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }

  .page-faq .ob-faq-block--shift-right .ob-faq-list {
    margin-left: 4%;
    margin-right: 12%;
  }

  .page-faq .ob-faq-block--shift-left .ob-faq-list {
    margin-left: 12%;
    margin-right: 4%;
  }

  .page-faq .ob-faq-item summary {
    padding: 1.25rem 1.375rem;
    font-size: 1.0625rem;
  }

  .page-faq .ob-faq-item .ob-faq-body {
    padding: 0 1.375rem 1.375rem;
    font-size: 1rem;
  }

  .page-faq .ob-sync-path {
    gap: 1rem;
    padding: 1.75rem 2rem;
    margin: 2.25rem 0 1.75rem;
  }

  .page-faq .ob-sync-step {
    padding: 1.25rem 1rem;
  }

  .page-faq .ob-sync-step p {
    font-size: 0.9375rem;
  }

  .page-faq .ob-sync-arrow {
    font-size: 1.5rem;
  }

  .page-faq .ob-sync-img {
    max-height: 480px;
    margin-bottom: 2rem;
  }

  .page-faq .ob-version-table {
    margin-bottom: 2rem;
  }

  .page-faq .ob-faq-support-card {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 2rem;
    padding: 2.5rem;
  }

  .page-faq .ob-faq-support-meta {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, auto);
    align-items: center;
    gap: 1.5rem;
    padding-top: 0.875rem;
  }
}

@media (min-width: 1080px) {
  .page-faq .ob-faq-hero-actions {
    margin-top: 1.75rem;
  }

  .page-faq .ob-faq-block--shift-right .ob-faq-list {
    margin-left: 8%;
    margin-right: 14%;
  }

  .page-faq .ob-faq-block--shift-left .ob-faq-list {
    margin-left: 14%;
    margin-right: 8%;
  }
}