/* ===== page-faq 专属样式 ===== */
.page-faq {
  --faq-gap: var(--spacing-lg);
  --faq-chapter-gap: var(--spacing-xl);
  --faq-border-color: var(--color-border);
  --faq-accent: var(--color-accent1);
  --faq-label-bg: rgba(155, 89, 182, 0.12);
  --faq-hero-border: var(--color-accent2);
  display: block;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
}

/* 面包屑 */
.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.page-faq .faq-breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-faq .faq-breadcrumb a:hover {
  color: var(--faq-accent);
}
.page-faq .breadcrumb-sep {
  color: var(--color-border);
  margin: 0 0.125rem;
}
.page-faq .breadcrumb-current {
  color: var(--color-text);
}

/* 英雄区 */
.page-faq .faq-hero {
  position: relative;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--faq-hero-border);
}
.page-faq .faq-hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 80px;
  height: 2px;
  background: var(--faq-accent);
}
.page-faq .faq-hero-title {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text);
  margin: 0 0 var(--spacing-sm);
  line-height: 1.1;
}
.page-faq .faq-hero-desc {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 680px;
  margin: 0;
}

/* 章节列表容器 */
.page-faq .faq-chapter-list {
  display: flex;
  flex-direction: column;
  gap: var(--faq-chapter-gap);
}

/* 单个章节 */
.page-faq .faq-chapter {
  background: rgba(18, 28, 42, 0.45);
  border: 1px solid var(--faq-border-color);
  border-left: 4px solid var(--faq-accent);
  padding: var(--spacing-lg) var(--spacing-md);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}
.page-faq .faq-chapter:hover {
  border-color: var(--faq-accent);
  box-shadow: 0 0 16px rgba(57, 255, 20, 0.06);
}

/* 章节头部 */
.page-faq .chapter-head {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}
.page-faq .chapter-num {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
  color: var(--faq-accent);
  opacity: 0.7;
  flex-shrink: 0;
  margin-right: var(--spacing-sm);
}
.page-faq .chapter-icon {
  width: 50px;
  height: 50px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: var(--border-radius);
  background: var(--faq-label-bg);
  padding: 4px;
  box-sizing: border-box;
}
.page-faq .chapter-title-group {
  flex: 1;
  min-width: 160px;
}
.page-faq .chapter-title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.125rem;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: 0.01em;
}
.page-faq .chapter-sub {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin: 0;
}

/* 章节主体（问题和图片） */
.page-faq .chapter-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* 折叠面板列表 */
.page-faq .faq-items {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* 单个问题 */
.page-faq .faq-item {
  border: 1px solid var(--faq-border-color);
  background: rgba(10, 31, 63, 0.5);
  transition: border-color var(--transition-fast), background var(--transition-fast);
  border-radius: var(--border-radius);
  overflow: hidden;
}
.page-faq .faq-item:hover {
  border-color: var(--color-text-secondary);
  background: rgba(10, 31, 63, 0.75);
}
.page-faq .faq-item[open] {
  border-color: var(--faq-accent);
  background: rgba(10, 31, 63, 0.85);
}

/* 问题摘要 */
.page-faq .faq-q {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  color: var(--color-text);
  list-style: none;
  user-select: none;
  transition: color var(--transition-fast);
  position: relative;
}
.page-faq .faq-q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-q::before {
  content: '+';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--faq-accent);
  border: 1px solid var(--faq-accent);
  border-radius: var(--border-radius);
  flex-shrink: 0;
  transition: transform var(--transition-base), background var(--transition-base);
  line-height: 1;
}
.page-faq .faq-item[open] .faq-q::before {
  content: '−';
  transform: rotate(90deg);
  background: var(--faq-accent);
  color: var(--color-primary);
}
.page-faq .q-num {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  color: var(--faq-accent);
  opacity: 0.8;
  min-width: 2.25rem;
  flex-shrink: 0;
}
.page-faq .faq-q:hover {
  color: var(--faq-accent);
}

/* 答案内容 */
.page-faq .faq-a {
  padding: 0 var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) + 2.25rem);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  border-top: 1px solid rgba(57, 255, 20, 0.15);
  margin-top: 0;
  animation: faqFadeIn 0.25s ease-out;
}
@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-faq .faq-a p {
  margin: var(--spacing-sm) 0 0;
}
.page-faq .faq-a a {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}
.page-faq .faq-a a:hover {
  color: var(--color-accent2);
}

/* 章节配图 */
.page-faq .chapter-figure {
  margin: 0;
  padding: var(--spacing-sm);
  border: 1px dashed var(--faq-border-color);
  background: rgba(18, 28, 42, 0.3);
  border-radius: var(--border-radius);
  max-width: 100%;
  box-sizing: border-box;
}
.page-faq .chapter-figure--wide {
  max-width: 100%;
}
.page-faq .chapter-figure--small {
  max-width: 220px;
}
.page-faq .figure-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: calc(var(--border-radius) - 1px);
}
.page-faq .figure-cap {
  margin-top: var(--spacing-xs);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  text-align: right;
  letter-spacing: 0.02em;
  opacity: 0.7;
}

/* ===== 响应式：桌面 ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: var(--spacing-xl) var(--spacing-lg);
  }
  .page-faq .faq-hero-title {
    font-size: 4rem;
  }
  .page-faq .faq-hero-desc {
    font-size: 1.125rem;
  }
  .page-faq .faq-chapter {
    padding: var(--spacing-lg) var(--spacing-xl);
  }
  .page-faq .chapter-num {
    font-size: 3.75rem;
  }
  .page-faq .chapter-title {
    font-size: 2rem;
  }
  .page-faq .chapter-body {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
  }
  .page-faq .faq-items {
    flex: 1 1 60%;
    min-width: 320px;
  }
  .page-faq .chapter-figure {
    flex: 0 0 auto;
    max-width: 380px;
    margin-left: auto;
  }
  .page-faq .chapter-figure--wide {
    flex: 1 1 100%;
    max-width: 100%;
    margin-left: 0;
    margin-top: var(--spacing-md);
  }
  .page-faq .chapter-figure--small {
    max-width: 220px;
  }
  .page-faq .faq-q {
    font-size: 1.0625rem;
    padding: var(--spacing-md) var(--spacing-lg);
  }
  .page-faq .faq-a {
    padding: 0 var(--spacing-lg) var(--spacing-md) calc(var(--spacing-lg) + 2.25rem);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-chapter {
    padding: var(--spacing-xl) var(--spacing-xl);
  }
  .page-faq .faq-items {
    flex: 1 1 65%;
  }
  .page-faq .chapter-figure {
    max-width: 420px;
  }
  .page-faq .chapter-figure--wide {
    max-width: 100%;
  }
}

/* ===== 响应式：极小屏安全 ===== */
@media (max-width: 380px) {
  .page-faq {
    padding: var(--spacing-sm);
  }
  .page-faq .faq-hero-title {
    font-size: 2rem;
  }
  .page-faq .chapter-head {
    gap: var(--spacing-sm);
  }
  .page-faq .chapter-num {
    font-size: 2.25rem;
  }
  .page-faq .chapter-title {
    font-size: 1.375rem;
  }
  .page-faq .faq-q {
    padding: var(--spacing-sm) var(--spacing-sm);
    font-size: 0.9375rem;
  }
  .page-faq .faq-a {
    padding: 0 var(--spacing-sm) var(--spacing-sm) var(--spacing-sm);
  }
}