/* ===== 页面专属：支持中心 (page-faq) ===== */
.page-faq {
  --faq-nav-width: 230px;
  --faq-gap: 2rem;
  --faq-category-gap: 1.25rem;
  --faq-item-radius: 8px;
  position: relative;
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: var(--color-text-primary, #E0E6F0);
  font-family: var(--font-body, 'Inter', 'PingFang SC', sans-serif);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary, #8899B0);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}
.page-faq .breadcrumb__link {
  color: var(--color-text-secondary, #8899B0);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .breadcrumb__link:hover,
.page-faq .breadcrumb__link:focus-visible {
  color: var(--color-accent-cyan, #00E5FF);
  outline: none;
}
.page-faq .breadcrumb__separator {
  color: var(--color-border, #2A3A50);
  user-select: none;
}
.page-faq .breadcrumb__item {
  color: var(--color-text-primary, #E0E6F0);
  font-weight: 400;
}

/* ---------- 英雄区 ---------- */
.page-faq .faq-hero {
  margin-bottom: 2.25rem;
  position: relative;
}
.page-faq .faq-hero::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-accent-cyan, #00E5FF);
  margin-top: 0.75rem;
  border-radius: 2px;
}
.page-faq .faq-hero__title {
  font-family: var(--font-headings, 'Poppins', sans-serif);
  font-weight: 700;
  font-size: 2rem;
  line-height: 1.15;
  color: var(--color-text-primary, #E0E6F0);
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}
.page-faq .faq-hero__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary, #8899B0);
  line-height: 1.6;
  max-width: 580px;
  margin: 0;
}

/* ---------- 搜索框 ---------- */
.page-faq .faq-search-wrap {
  position: relative;
  margin-bottom: 2rem;
  max-width: 480px;
}
.page-faq .faq-search {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem 0.75rem 2.75rem;
  background: var(--color-bg-card, #141C2B);
  border: 1px solid var(--color-border, #2A3A50);
  border-radius: 6px;
  color: var(--color-text-primary, #E0E6F0);
  font-family: var(--font-body, 'Inter', 'PingFang SC', sans-serif);
  font-size: 0.9375rem;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.page-faq .faq-search::placeholder {
  color: var(--color-text-secondary, #8899B0);
  opacity: 0.7;
}
.page-faq .faq-search:focus {
  border-color: var(--color-accent-cyan, #00E5FF);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.12);
}
.page-faq .faq-search__icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--color-text-secondary, #8899B0);
  pointer-events: none;
  line-height: 1;
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--faq-gap, 2rem);
}

/* ---------- 左侧导航 ---------- */
.page-faq .faq-nav {
  flex-shrink: 0;
  position: relative;
}
.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.page-faq .faq-nav__item {
  flex: 0 0 auto;
}
.page-faq .faq-nav__link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary, #8899B0);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 6px;
  background: var(--color-bg-surface, #1A2638);
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  white-space: nowrap;
}
.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--color-accent-cyan, #00E5FF);
  border-color: var(--color-accent-cyan, #00E5FF);
  background: rgba(0, 229, 255, 0.06);
  outline: none;
}
.page-faq .faq-nav__num {
  font-family: var(--font-numbers, 'JetBrains Mono', monospace);
  font-size: 0.75rem;
  color: var(--color-accent-cyan, #00E5FF);
  opacity: 0.7;
}
.page-faq .faq-nav__guide-line {
  display: none;
}

/* ---------- 右侧内容区 ---------- */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-category {
  margin-bottom: 2.75rem;
}
.page-faq .faq-category:last-child {
  margin-bottom: 0;
}
.page-faq .faq-category__title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-headings, 'Poppins', sans-serif);
  font-weight: 600;
  font-size: 1.375rem;
  color: var(--color-text-primary, #E0E6F0);
  margin: 0 0 1.25rem;
  letter-spacing: -0.01em;
}
.page-faq .faq-category__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-family: var(--font-numbers, 'JetBrains Mono', monospace);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-bg-dark, #0A0F1A);
  background: var(--color-accent-cyan, #00E5FF);
  border-radius: 4px;
  flex-shrink: 0;
}
.page-faq .faq-category__items {
  display: flex;
  flex-direction: column;
  gap: var(--faq-category-gap, 1.25rem);
}

/* ---------- 单个问题 (details/summary) ---------- */
.page-faq .faq-item {
  background: var(--color-bg-card, #141C2B);
  border: 1px solid var(--color-border, #2A3A50);
  border-radius: var(--faq-item-radius, 8px);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 255, 0.25);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.08), 0 4px 20px rgba(0, 0, 0, 0.3);
}
.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-primary, #E0E6F0);
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: color 0.2s;
  position: relative;
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q::marker {
  display: none;
  content: '';
}
.page-faq .faq-item__q::after {
  content: '+';
  font-family: var(--font-numbers, 'JetBrains Mono', monospace);
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--color-accent-cyan, #00E5FF);
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.3s ease, color 0.2s;
  line-height: 1;
}
.page-faq .faq-item[open] .faq-item__q::after {
  content: '−';
  transform: rotate(0deg);
  color: var(--color-accent-orange, #FF6B35);
}
.page-faq .faq-item__q:hover {
  color: var(--color-accent-cyan, #00E5FF);
}
.page-faq .faq-item[open] .faq-item__q {
  color: var(--color-accent-cyan, #00E5FF);
  border-bottom: 1px solid var(--color-border, #2A3A50);
}
.page-faq .faq-item__a {
  padding: 1rem 1.25rem 1.25rem;
  font-size: 0.9rem;
  color: var(--color-text-secondary, #8899B0);
  line-height: 1.7;
  border-top: none;
}
.page-faq .faq-item__a p {
  margin: 0 0 0.75rem;
}
.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

/* ---------- 内联链接 ---------- */
.page-faq .faq-inline-link {
  color: var(--color-accent-cyan, #00E5FF);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--color-accent-orange, #FF6B35);
  border-bottom-color: var(--color-accent-orange, #FF6B35);
  outline: none;
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 1rem 0 0;
  max-width: 300px;
}
.page-faq .faq-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  border: 1px solid var(--color-border, #2A3A50);
  background: var(--color-bg-surface, #1A2638);
  object-fit: cover;
}
.page-faq .faq-figure__cap {
  margin-top: 0.4rem;
  font-size: 0.75rem;
  color: var(--color-text-secondary, #8899B0);
  letter-spacing: 0.02em;
}

/* ---------- 底部脚注 ---------- */
.page-faq .faq-footnote {
  margin-top: 2.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border, #2A3A50);
}
.page-faq .faq-footnote__text {
  font-size: 0.8125rem;
  color: var(--color-text-secondary, #8899B0);
  opacity: 0.75;
  margin: 0;
  line-height: 1.6;
}

/* ========== 桌面端 (≥768px) ========== */
@media (min-width: 768px) {
  .page-faq {
    padding: 2rem 2rem 4rem;
  }
  .page-faq .faq-hero__title {
    font-size: 2.5rem;
  }
  .page-faq .faq-hero__desc {
    font-size: 1rem;
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  /* 导航：垂直侧边栏 */
  .page-faq .faq-nav {
    width: var(--faq-nav-width, 230px);
    position: sticky;
    top: calc(var(--header-height, 64px) + 1.5rem);
  }
  .page-faq .faq-nav__list {
    flex-direction: column;
    gap: 0.375rem;
    padding: 0.5rem 0;
    border-left: 1px solid var(--color-border, #2A3A50);
  }
  .page-faq .faq-nav__item {
    flex: none;
  }
  .page-faq .faq-nav__link {
    white-space: normal;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0.4rem 0.75rem 0.4rem 1.25rem;
    font-size: 0.875rem;
    border-left: 2px solid transparent;
    margin-left: -1px;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
  }
  .page-faq .faq-nav__link:hover,
  .page-faq .faq-nav__link:focus-visible {
    background: rgba(0, 229, 255, 0.04);
    border-left-color: var(--color-accent-cyan, #00E5FF);
    color: var(--color-accent-cyan, #00E5FF);
  }
  .page-faq .faq-nav__guide-line {
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-border, #2A3A50);
    opacity: 0.5;
  }
  /* 搜索框宽度 */
  .page-faq .faq-search-wrap {
    max-width: 400px;
  }
  /* 内容区与导航间距 */
  .page-faq .faq-content {
    padding-left: 0.5rem;
  }
  /* 图片可略大 */
  .page-faq .faq-figure {
    max-width: 320px;
  }
}

/* ========== 大桌面端 (≥1024px) ========== */
@media (min-width: 1024px) {
  .page-faq {
    padding: 2.5rem 2.5rem 5rem;
  }
  .page-faq .faq-hero__title {
    font-size: 2.75rem;
  }
  .page-faq .faq-nav {
    width: 250px;
  }
  .page-faq .faq-content {
    padding-left: 1.25rem;
  }
  .page-faq .faq-item__q {
    padding: 1.125rem 1.5rem;
    font-size: 1rem;
  }
  .page-faq .faq-item__a {
    padding: 1.125rem 1.5rem 1.375rem;
    font-size: 0.9375rem;
  }
}