/* ===== 页面作用域：.page-faq ===== */
.page-faq {
  position: relative;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  padding: 0 var(--space-sm) var(--space-xl);
  overflow: hidden;
  min-height: 100vh;
}

/* 背景装饰图 — 全幅固定底层 */
.page-faq .faq-bg-deco {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  opacity: 0.07;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

/* 所有内容置于背景之上 */
.page-faq .container {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

/* ---- 面包屑 ---- */
.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-family: var(--font-heading);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
  flex-wrap: wrap;
}
.page-faq .faq-breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .faq-breadcrumb a:hover {
  color: var(--color-accent-highlight);
}
.page-faq .faq-breadcrumb-sep {
  color: var(--color-accent-secondary);
  opacity: 0.6;
}

/* ---- 标题区 ---- */
.page-faq .faq-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}
.page-faq .faq-hero-text {
  flex: 1 1 280px;
}
.page-faq .faq-title {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 var(--space-xs);
  text-transform: uppercase;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.page-faq .faq-title.glow-text {
  text-shadow: 0 0 12px var(--color-accent), 0 0 40px var(--color-accent-secondary);
}
.page-faq .faq-subtitle {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  margin: 0;
}
.page-faq .faq-hero-icon {
  width: 120px;
  height: 120px;
  object-fit: contain;
  flex-shrink: 0;
  opacity: 0.85;
  filter: drop-shadow(0 0 20px var(--color-accent-secondary));
  transition: transform 0.3s ease;
}
.page-faq .faq-hero-icon:hover {
  transform: scale(1.04) rotate(-2deg);
}

/* ---- 主体布局：侧边栏 + 手风琴 ---- */
.page-faq .faq-layout {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}

/* ---- 侧边导航（移动端横向滚动标签） ---- */
.page-faq .faq-sidebar {
  flex-shrink: 0;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  margin-bottom: var(--space-md);
}
.page-faq .faq-sidebar::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-sidebar-heading {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-secondary);
  margin: 0 0 var(--space-sm);
  display: block;
}
.page-faq .faq-sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.5rem;
  flex-wrap: nowrap;
  min-width: max-content;
}
.page-faq .faq-sidebar-link {
  display: block;
  padding: 0.5rem 1.2rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--glass);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  text-decoration: none;
  white-space: nowrap;
  transition: all 0.25s ease;
}
.page-faq .faq-sidebar-link:hover,
.page-faq .faq-sidebar-link:focus {
  color: var(--color-text);
  background: rgba(26,92,255,0.15);
  border-color: var(--color-accent);
  box-shadow: 0 0 18px rgba(26,92,255,0.2);
}

/* ---- 手风琴容器 ---- */
.page-faq .faq-accordion {
  flex: 1;
  min-width: 0;
}

/* ---- 分组 ---- */
.page-faq .faq-group {
  margin-bottom: var(--space-lg);
  scroll-margin-top: 80px;
}
.page-faq .faq-group-title {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid;
  border-image: linear-gradient(90deg, var(--color-accent), var(--color-accent-secondary)) 1;
  display: inline-block;
  letter-spacing: -0.01em;
  color: var(--color-text);
}
.page-faq .faq-group-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

/* ---- 手风琴单项 ---- */
.page-faq .faq-item {
  background: var(--glass);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  transition: border-color 0.3s, box-shadow 0.3s;
  overflow: hidden;
}
.page-faq .faq-item:hover {
  border-color: rgba(26,92,255,0.2);
}

/* 触发按钮 */
.page-faq .faq-item-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-md) var(--space-md);
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--color-text);
  font-family: var(--font-heading);
  gap: var(--space-sm);
  transition: background 0.25s;
}
.page-faq .faq-item-trigger:hover {
  background: rgba(26,92,255,0.06);
}
.page-faq .faq-item-trigger:focus-visible {
  outline: 2px solid var(--color-accent-highlight);
  outline-offset: -2px;
}

/* 问题标题（h3 内嵌于按钮） */
.page-faq .faq-item-question {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-text);
  line-height: 1.4;
  flex: 1;
  min-width: 0;
}

/* 展开/折叠图标 */
.page-faq .faq-item-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform 0.35s ease;
}
.page-faq .faq-item-icon::before,
.page-faq .faq-item-icon::after {
  content: "";
  position: absolute;
  background: var(--color-accent-highlight);
  border-radius: 2px;
  transition: transform 0.35s ease;
}
.page-faq .faq-item-icon::before {
  width: 2px;
  height: 16px;
  top: 4px;
  left: 11px;
}
.page-faq .faq-item-icon::after {
  width: 16px;
  height: 2px;
  top: 11px;
  left: 4px;
}

/* 展开状态：图标旋转（竖线消失或旋转） */
.page-faq .faq-item-trigger[aria-expanded="true"] .faq-item-icon {
  transform: rotate(45deg);
}
.page-faq .faq-item-trigger[aria-expanded="true"] .faq-item-icon::before {
  transform: rotate(90deg);
}

/* 内容区域（默认折叠隐藏，展开显示） */
.page-faq .faq-item-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s ease, padding 0.35s ease, opacity 0.3s ease;
  opacity: 0;
  padding: 0 var(--space-md);
}
.page-faq .faq-item-trigger[aria-expanded="true"] + .faq-item-content {
  max-height: 400px;
  opacity: 1;
  padding: 0 var(--space-md) var(--space-md);
}
.page-faq .faq-item-content p {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}
.page-faq .faq-item-content p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.page-faq .faq-item-content a:hover {
  color: var(--color-accent-highlight);
}

/* 特殊提示 */
.page-faq .faq-note {
  font-size: 0.85rem;
  color: var(--color-accent-secondary) !important;
  border-left: 2px solid var(--color-accent-secondary);
  padding-left: var(--space-sm);
  margin-top: var(--space-xs);
}

/* ---- 信任声明 ---- */
.page-faq .faq-trust {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--radius);
}
.page-faq .faq-trust p {
  margin: 0;
}

/* ===== 响应式：桌面端 ≥ 768px ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: 0 var(--space-md) var(--space-xl);
  }
  .page-faq .faq-hero {
    flex-wrap: nowrap;
  }
  .page-faq .faq-title {
    font-size: 3.6rem;
  }
  .page-faq .faq-hero-icon {
    width: 160px;
    height: 160px;
  }

  /* 侧边栏：竖向固定宽度 */
  .page-faq .faq-sidebar {
    width: 200px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--nav-height) + var(--space-md));
    overflow: visible;
    margin-bottom: 0;
  }
  .page-faq .faq-sidebar-list {
    flex-direction: column;
    gap: 0.4rem;
    min-width: auto;
  }
  .page-faq .faq-sidebar-link {
    padding: 0.65rem 1.2rem;
    font-size: 0.9rem;
    white-space: normal;
  }

  /* 手风琴内容间距 */
  .page-faq .faq-group-title {
    font-size: 1.8rem;
  }
  .page-faq .faq-item-question {
    font-size: 1.1rem;
  }
  .page-faq .faq-item-content p {
    font-size: 1rem;
  }
}

/* ===== 大桌面端 ≥ 1024px ===== */
@media (min-width: 1024px) {
  .page-faq .faq-title {
    font-size: 4.2rem;
  }
  .page-faq .faq-hero-icon {
    width: 200px;
    height: 200px;
  }
  .page-faq .faq-sidebar {
    width: 220px;
  }
}