.page-faq {
  --faq-gold: #F4A261;
  --faq-red: #E63946;
  --faq-deep-blue: #1D3557;
  --faq-light-bg: #F5F5F5;
  --faq-border: #457B9D;
  --faq-text-dark: #1D3557;
  --faq-white: #FFFFFF;
  --faq-font-heading: Impact, 'Arial Black', sans-serif;
  --faq-font-body: 'Helvetica Neue', Arial, sans-serif;
  --faq-font-data: 'Courier New', monospace;
  --faq-transition: 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  --faq-radius: 0;
}

.page-faq .container {
  max-width: var(--content-max, 1200px);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* 头部装饰条 */
.page-faq .faq-header-strip {
  position: relative;
  background: var(--faq-deep-blue);
  overflow: hidden;
  margin-top: var(--nav-height, 64px);
}

.page-faq .faq-hero-graphic {
  display: block;
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: cover;
  opacity: 0.3;
  mix-blend-mode: overlay;
}

.page-faq .faq-header-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem 1.25rem;
  background: linear-gradient(135deg, rgba(230,57,70,0.25) 0%, rgba(29,53,87,0.6) 100%);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--faq-font-body);
  font-size: 0.8125rem;
  color: var(--faq-white);
  opacity: 0.8;
  margin-bottom: 0.75rem;
}

.page-faq .breadcrumb a {
  color: var(--faq-white);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--faq-transition);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus {
  border-bottom-color: var(--faq-gold);
}

.page-faq .breadcrumb .sep {
  margin: 0 0.25rem;
  color: var(--faq-gold);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--faq-gold);
  font-weight: 700;
}

.page-faq .section-title {
  font-family: var(--faq-font-heading);
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--faq-white);
  margin: 0 0 0.25rem;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.page-faq .section-sub {
  font-family: var(--faq-font-body);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--faq-white);
  opacity: 0.9;
  margin: 0;
  max-width: 600px;
}

/* 工具栏：搜索 + 标签 */
.page-faq .faq-toolbar {
  background: var(--faq-light-bg);
  border-bottom: 2px solid var(--faq-border);
  padding: 1.5rem 0 0.75rem;
  position: sticky;
  top: var(--nav-height, 64px);
  z-index: 20;
}

.page-faq .faq-search-wrap {
  position: relative;
  margin-bottom: 1rem;
}

.page-faq .faq-search-input {
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  font-family: var(--faq-font-body);
  font-size: 1rem;
  border: 2px solid var(--faq-border);
  border-radius: var(--faq-radius);
  background: var(--faq-white);
  color: var(--faq-text-dark);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  -webkit-appearance: none;
  appearance: none;
}

.page-faq .faq-search-input:focus {
  outline: none;
  border-color: var(--faq-red);
  box-shadow: 0 0 0 3px rgba(230,57,70,0.15);
}

.page-faq .faq-search-input::placeholder {
  color: #888;
  opacity: 1;
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--faq-red);
  pointer-events: none;
}

.page-faq .faq-tabs {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.5rem;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  padding: 0.5rem 1.125rem;
  font-family: var(--faq-font-heading);
  font-size: 0.8125rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 2px solid transparent;
  border-radius: var(--faq-radius);
  background: transparent;
  color: var(--faq-text-dark);
  cursor: pointer;
  transition: all var(--faq-transition);
  white-space: nowrap;
}

.page-faq .faq-tab:hover {
  border-color: var(--faq-border);
  background: rgba(69,123,157,0.08);
}

.page-faq .faq-tab:focus {
  outline: 2px solid var(--faq-red);
  outline-offset: 2px;
}

.page-faq .faq-tab.active {
  background: var(--faq-red);
  color: var(--faq-white);
  border-color: var(--faq-red);
}

/* 面板容器 */
.page-faq .faq-panels {
  padding-top: 2rem;
  padding-bottom: 3rem;
}

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

.page-faq .faq-panel.active {
  display: block;
  animation: faqFadeIn 0.35s ease-out;
}

@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-faq .faq-panel-heading {
  font-family: var(--faq-font-heading);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--faq-deep-blue);
  margin: 0 0 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--faq-red);
  display: inline-block;
}

/* 手风琴列表 */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.page-faq .faq-item {
  border: 2px solid var(--faq-border);
  border-radius: var(--faq-radius);
  background: var(--faq-white);
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
}

.page-faq .faq-item:focus-within {
  border-color: var(--faq-red);
  box-shadow: 0 0 0 3px rgba(230,57,70,0.1);
}

.page-faq .faq-item.open {
  border-color: var(--faq-gold);
  box-shadow: 0 2px 12px rgba(244,162,97,0.15);
}

.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  margin: 0;
  cursor: pointer;
  font-family: var(--faq-font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-text-dark);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--faq-transition);
}

.page-faq .faq-question:hover {
  background: rgba(69,123,157,0.05);
}

.page-faq .faq-q-mark {
  flex: 0 0 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--faq-font-heading);
  font-size: 0.875rem;
  font-weight: 900;
  color: var(--faq-white);
  background: var(--faq-red);
  border-radius: var(--faq-radius);
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
}

.page-faq .faq-toggle {
  flex: 0 0 1.5rem;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--faq-border);
  transition: transform var(--faq-transition), color var(--faq-transition);
  line-height: 1;
}

.page-faq .faq-item.open .faq-toggle {
  transform: rotate(45deg);
  color: var(--faq-gold);
}

.page-faq .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out, padding 0.3s ease-out;
  padding: 0 1.25rem;
  border-top: 0 solid var(--faq-border);
}

.page-faq .faq-item.open .faq-answer {
  max-height: 600px;
  padding: 1rem 1.25rem 1.25rem;
  border-top-width: 1px;
}

.page-faq .faq-answer p {
  margin: 0 0 0.75rem;
  font-family: var(--faq-font-body);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #333;
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer a {
  color: var(--faq-red);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--faq-transition);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus {
  color: var(--faq-gold);
}

/* 数据校准流程图 */
.page-faq .faq-image-block {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  background: var(--faq-light-bg);
  padding: 0.75rem 1rem;
  border-radius: var(--faq-radius);
  border-left: 4px solid var(--faq-gold);
}

.page-faq .faq-image-block img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-border);
  border-radius: var(--faq-radius);
}

.page-faq .faq-image-caption {
  font-family: var(--faq-font-data);
  font-size: 0.8125rem;
  color: var(--faq-deep-blue);
  opacity: 0.8;
}

/* 底部CTA */
.page-faq .faq-cta-strip {
  text-align: center;
  padding: 2.5rem 0;
}

.page-faq .faq-cta-strip .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.page-faq .faq-cta-text {
  font-family: var(--faq-font-heading);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--faq-white);
  margin: 0;
}

.page-faq .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  font-family: var(--faq-font-heading);
  font-size: 1rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--faq-white);
  background: var(--faq-red);
  border: 2px solid var(--faq-red);
  border-radius: var(--faq-radius);
  text-decoration: none;
  transition: all var(--faq-transition);
  cursor: pointer;
}

.page-faq .btn-primary:hover,
.page-faq .btn-primary:focus {
  background: transparent;
  color: var(--faq-red);
  outline: none;
}

.page-faq .btn-primary:focus {
  box-shadow: 0 0 0 3px rgba(230,57,70,0.3);
}

/* 响应式 */
@media (max-width: 639px) {
  .page-faq .faq-header-overlay {
    padding: 1.25rem 1rem;
  }

  .page-faq .faq-tabs {
    gap: 0.125rem;
  }

  .page-faq .faq-tab {
    padding: 0.375rem 0.75rem;
    font-size: 0.6875rem;
  }

  .page-faq .faq-question {
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
  }

  .page-faq .faq-item.open .faq-answer {
    padding: 0.75rem 1rem 1rem;
  }

  .page-faq .faq-image-block {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-faq .faq-cta-strip {
    padding: 2rem 1rem;
  }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .page-faq .faq-tab {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-panels {
    padding-top: 2.5rem;
    padding-bottom: 4rem;
  }

  .page-faq .faq-list {
    max-width: 900px;
  }
}

/* 隐藏辅助文字 */
.page-faq .sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}