.page-faq {
  --faq-number-size: 2.5rem;
  --faq-number-size-desktop: 3.25rem;
  --faq-accordion-border-color: #e0e0e0;
  --faq-diagonal-accent: linear-gradient(135deg, var(--color-accent) 40%, var(--color-primary) 40%, var(--color-primary) 52%, transparent 52%);
  --faq-trigger-hover-bg: #fafafa;

  padding-bottom: var(--spacing-xl);
  background-color: var(--color-neutral-light);
  color: var(--color-neutral-dark);
  font-family: var(--font-body);
  line-height: 1.6;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-md) 0;
  font-size: var(--font-size-small);
  color: var(--color-gray-medium);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}
.page-faq .breadcrumb-link {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}
.page-faq .breadcrumb-link:hover {
  color: var(--color-accent);
}
.page-faq .breadcrumb-sep {
  user-select: none;
  color: var(--color-gray-light);
}
.page-faq .breadcrumb-current {
  color: var(--color-gray-medium);
  font-weight: 500;
}

/* ---------- Hero ---------- */
.page-faq .faq-hero {
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-xl);
  text-align: center;
}
.page-faq .faq-hero-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h1);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-sm);
  letter-spacing: -0.02em;
}
.page-faq .faq-hero-desc {
  font-size: var(--font-size-body);
  color: var(--color-gray-medium);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- 手风琴组 ---------- */
.page-faq .faq-group {
  padding: var(--spacing-xl) var(--spacing-md);
}
.page-faq .faq-group + .faq-group {
  padding-top: 0;
}
.page-faq .faq-group-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}
.page-faq .faq-group-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  line-height: 1;
  color: var(--color-accent);
  display: inline-block;
  min-width: 2.4rem;
}

/* ---------- 手风琴项 ---------- */
.page-faq .accordion {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}
.page-faq .accordion-item {
  background-color: var(--color-white);
  border: 1px solid var(--faq-accordion-border-color);
  border-radius: 0;
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
  /* 切角装饰 */
  clip-path: polygon(16px 0, 100% 0, 100% 100%, 0 100%, 0 16px);
}
.page-faq .accordion-item[open] {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(26, 42, 106, 0.08);
}

/* ---------- 触发器 ---------- */
.page-faq .accordion-trigger {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background-color var(--transition-base);
  min-height: 3.5rem;
}
.page-faq .accordion-trigger::-webkit-details-marker {
  display: none;
}
.page-faq .accordion-trigger:hover {
  background-color: var(--faq-trigger-hover-bg);
}
.page-faq .accordion-number {
  font-family: var(--font-mono);
  font-size: var(--faq-number-size);
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  min-width: 2.8rem;
  flex-shrink: 0;
  letter-spacing: -0.02em;
}
.page-faq .accordion-question {
  font-family: var(--font-heading);
  font-size: var(--font-size-body);
  font-weight: 600;
  color: var(--color-neutral-dark);
  flex: 1;
  line-height: 1.4;
}
.page-faq .accordion-icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  position: relative;
  transition: transform var(--transition-base);
}
.page-faq .accordion-icon::before,
.page-faq .accordion-icon::after {
  content: '';
  position: absolute;
  background-color: var(--color-gray-medium);
  transition: background-color var(--transition-base), transform var(--transition-base);
}
.page-faq .accordion-icon::before {
  width: 2px;
  height: 100%;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}
.page-faq .accordion-icon::after {
  width: 100%;
  height: 2px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}
.page-faq .accordion-item[open] .accordion-icon::before {
  transform: translateX(-50%) rotate(90deg);
  background-color: var(--color-accent);
}
.page-faq .accordion-item[open] .accordion-icon::after {
  background-color: var(--color-accent);
}

/* ---------- 内容区 ---------- */
.page-faq .accordion-content {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--color-gray-medium);
  font-size: var(--font-size-body);
  line-height: 1.7;
  border-top: 0 solid transparent;
  position: relative;
  animation: faq-fade-in 0.3s ease-out;
}
.page-faq .accordion-content::before {
  content: '';
  display: block;
  height: 6px;
  background: var(--faq-diagonal-accent);
  margin-bottom: var(--spacing-md);
  background-size: 200% 100%;
  background-repeat: no-repeat;
}
.page-faq .accordion-content p {
  margin: 0 0 var(--spacing-sm);
}
.page-faq .accordion-content p:last-child {
  margin-bottom: 0;
}
.page-faq .accordion-content a:not(.btn) {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-base);
}
.page-faq .accordion-content a:not(.btn):hover {
  color: var(--color-accent);
}
.page-faq .accordion-btn {
  margin-top: var(--spacing-sm);
}

@keyframes faq-fade-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 功能使用 组内布局 ---------- */
.page-faq .faq-group-layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}
.page-faq .faq-group-image {
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}
.page-faq .faq-group-image img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--faq-accordion-border-color);
  clip-path: polygon(12px 0, 100% 0, 100% 100%, 0 100%, 0 12px);
  object-fit: cover;
}

/* ---------- CTA ---------- */
.page-faq .faq-cta {
  margin: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
  padding: var(--spacing-xl) var(--spacing-md);
  background-color: var(--color-primary);
  color: var(--color-white);
  text-align: center;
  clip-path: polygon(24px 0, 100% 0, 100% 100%, 0 100%, 0 24px);
}
.page-faq .faq-cta-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h3);
  font-weight: 700;
  margin: 0 0 var(--spacing-sm);
}
.page-faq .faq-cta-desc {
  font-size: var(--font-size-body);
  margin: 0 0 var(--spacing-lg);
  opacity: 0.85;
}
.page-faq .faq-cta-btn {
  display: inline-block;
}

/* ---------- 品牌标志 ---------- */
.page-faq .faq-brand {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-lg) var(--spacing-md) 0;
}
.page-faq .faq-brand img {
  max-width: 100%;
  height: auto;
  opacity: 0.7;
  transition: opacity var(--transition-base);
}
.page-faq .faq-brand img:hover {
  opacity: 1;
}

/* ---------- 响应式桌面 ---------- */
@media (min-width: 768px) {
  .page-faq {
    --faq-number-size: var(--faq-number-size-desktop);
  }

  .page-faq .breadcrumb {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }

  .page-faq .faq-hero {
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
  }
  .page-faq .faq-hero-title {
    font-size: 3.25rem;
  }
  .page-faq .faq-hero-desc {
    font-size: 1.125rem;
  }

  .page-faq .faq-group {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }
  .page-faq .faq-group-title {
    font-size: 2.25rem;
  }
  .page-faq .faq-group-number {
    font-size: 2.5rem;
  }

  .page-faq .accordion-trigger {
    padding: var(--spacing-lg) var(--spacing-xl);
    min-height: 4rem;
  }
  .page-faq .accordion-question {
    font-size: 1.0625rem;
  }
  .page-faq .accordion-content {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
  }

  .page-faq .faq-group-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-faq .faq-group-layout .accordion {
    flex: 1;
  }
  .page-faq .faq-group-image {
    width: 200px;
    margin-top: 0;
  }

  .page-faq .faq-cta {
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    padding: var(--spacing-xl) var(--spacing-lg);
  }
  .page-faq .faq-cta-title {
    font-size: 2rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .container {
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
  }
  .page-faq .faq-group {
    padding-left: 0;
    padding-right: 0;
  }
  .page-faq .faq-hero {
    padding-left: 0;
    padding-right: 0;
  }
  .page-faq .breadcrumb {
    padding-left: 0;
    padding-right: 0;
  }
  .page-faq .faq-group-layout .accordion {
    max-width: 780px;
  }
}