.page-faq {
  --faq-glass-bg: rgba(10, 25, 47, 0.7);
  --faq-glass-border: rgba(0, 255, 127, 0.25);
  --faq-glow: 0 0 20px rgba(0, 255, 127, 0.08);
  --faq-radius-lg: 16px;
  --faq-radius-sm: 8px;
  --faq-category-accent: #00FF7F;
  --faq-text-dim: #8899AA;
}

/* ===== 容器与面包屑 ===== */
.page-faq .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--space-md, 24px) var(--space-sm, 16px);
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body, "Inter", Helvetica, Arial, sans-serif);
  font-size: var(--caption, 0.875rem);
  color: var(--text-body, #B0BEC5);
  margin-bottom: var(--space-lg, 32px);
  padding-bottom: var(--space-sm, 16px);
  border-bottom: 1px solid rgba(0, 255, 127, 0.08);
}

.page-faq .breadcrumb a {
  color: var(--primary, #00FF7F);
  text-decoration: none;
  transition: opacity 0.25s ease;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  opacity: 0.75;
  outline: 2px solid var(--primary, #00FF7F);
  outline-offset: 2px;
  border-radius: 2px;
}

.page-faq .breadcrumb .sep {
  color: var(--text-body, #B0BEC5);
  opacity: 0.5;
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--text-primary, #E6F7FF);
  font-weight: 500;
}

/* ===== 页面英雄区 ===== */
.page-faq .faq-hero {
  margin-bottom: var(--space-xl, 48px);
  position: relative;
}

.page-faq .faq-hero-inner {
  display: flex;
  align-items: center;
  gap: var(--space-lg, 32px);
  flex-wrap: wrap;
}

.page-faq .faq-hero-icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-lg, 16px);
  box-shadow: var(--shadow-glass, 0 4px 24px rgba(0,255,127,0.08));
  background: var(--card-bg, rgba(10,25,47,0.85));
  object-fit: contain;
  padding: 8px;
  flex-shrink: 0;
}

.page-faq .faq-hero-text {
  flex: 1;
  min-width: 220px;
}

.page-faq .faq-hero-text .h1 {
  font-family: var(--font-heading, "Oswald", "Impact", "Arial Black", sans-serif);
  font-size: var(--h1, 2.25rem);
  line-height: var(--h1-line, 1.1);
  color: var(--text-primary, #E6F7FF);
  margin: 0 0 var(--space-xs, 8px) 0;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  display: inline-block;
}

.page-faq .faq-hero-text .h1::after {
  content: '';
  display: block;
  width: 60%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary, #00FF7F), transparent);
  margin-top: 6px;
  border-radius: 2px;
}

.page-faq .page-desc {
  font-family: var(--font-body, "Inter", Helvetica, Arial, sans-serif);
  font-size: var(--body, 1rem);
  line-height: var(--body-line, 1.6);
  color: var(--text-body, #B0BEC5);
  margin: var(--space-sm, 16px) 0 0 0;
  max-width: 580px;
}

.page-faq .divider-skew {
  height: 4px;
  background: linear-gradient(135deg, var(--primary, #00FF7F) 30%, transparent 70%);
  margin-top: var(--space-lg, 32px);
  transform: skewX(-8deg);
  border-radius: 2px;
  opacity: 0.6;
}

/* ===== 搜索框 ===== */
.page-faq .search-box-wrap {
  position: relative;
  margin-bottom: var(--space-xl, 48px);
  max-width: 640px;
}

.page-faq .search-input {
  width: 100%;
  padding: 16px 20px 16px 52px;
  font-family: var(--font-body, "Inter", Helvetica, Arial, sans-serif);
  font-size: var(--body, 1rem);
  color: var(--text-primary, #E6F7FF);
  background: var(--card-bg, rgba(10,25,47,0.85));
  border: 2px solid var(--faq-glass-border, rgba(0,255,127,0.25));
  border-radius: var(--radius-lg, 16px);
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  box-sizing: border-box;
}

.page-faq .search-input::placeholder {
  color: var(--faq-text-dim, #8899AA);
  opacity: 0.8;
}

.page-faq .search-input:focus {
  border-color: var(--primary, #00FF7F);
  box-shadow: 0 0 0 3px rgba(0, 255, 127, 0.15), var(--faq-glow);
}

.page-faq .search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.6rem;
  color: var(--primary, #00FF7F);
  opacity: 0.7;
  pointer-events: none;
  line-height: 1;
}

/* ===== 双列布局 ===== */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md, 24px);
  position: relative;
}

/* ===== 左侧分类导航 ===== */
.page-faq .faq-categories {
  position: sticky;
  top: 24px;
  align-self: start;
  background: var(--faq-glass-bg);
  border: 1px solid var(--faq-glass-border);
  border-radius: var(--faq-radius-lg, 16px);
  padding: var(--space-sm, 16px);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--faq-glow);
}

.page-faq .category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .cat-link {
  display: block;
  padding: 10px 20px;
  font-family: var(--font-heading, "Oswald", "Impact", "Arial Black", sans-serif);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-body, #B0BEC5);
  text-decoration: none;
  border-radius: var(--faq-radius-sm, 8px);
  background: transparent;
  border: 1px solid transparent;
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

.page-faq .cat-link:hover,
.page-faq .cat-link:focus-visible {
  color: var(--text-primary, #E6F7FF);
  background: rgba(0, 255, 127, 0.08);
  border-color: var(--faq-glass-border);
  transform: translateY(-1px);
  outline: none;
}

.page-faq .cat-link:focus-visible {
  box-shadow: 0 0 0 2px var(--primary, #00FF7F);
}

.page-faq .cat-link:active {
  transform: translateY(0);
}

.page-faq .categories-mask {
  display: none;
}

/* ===== 右侧问题列表 ===== */
.page-faq .faq-questions {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl, 48px);
}

.page-faq .faq-category {
  scroll-margin-top: 80px;
}

.page-faq .category-title {
  font-family: var(--font-heading, "Oswald", "Impact", "Arial Black", sans-serif);
  font-size: var(--h3, 1.5rem);
  line-height: var(--h3-line, 1.3);
  color: var(--text-primary, #E6F7FF);
  margin: 0 0 var(--space-md, 24px) 0;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-faq .cat-indicator {
  display: inline-block;
  width: 6px;
  height: 28px;
  background: var(--primary, #00FF7F);
  border-radius: 3px;
  flex-shrink: 0;
}

/* ===== 手风琴项 ===== */
.page-faq .faq-item {
  background: var(--faq-glass-bg);
  border: 1px solid var(--faq-glass-border);
  border-radius: var(--faq-radius-sm, 8px);
  margin-bottom: var(--space-sm, 16px);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--faq-glow);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 255, 127, 0.45);
  box-shadow: 0 0 30px rgba(0, 255, 127, 0.06);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-family: var(--font-body, "Inter", Helvetica, Arial, sans-serif);
  font-size: var(--body, 1rem);
  font-weight: 600;
  color: var(--text-primary, #E6F7FF);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background 0.25s ease;
  position: relative;
}

.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item summary::marker {
  display: none;
  content: '';
}

.page-faq .faq-item summary::after {
  content: '+';
  font-family: var(--font-heading, "Oswald", "Impact", "Arial Black", sans-serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--primary, #00FF7F);
  transition: transform 0.35s ease, color 0.25s ease;
  flex-shrink: 0;
  margin-left: 16px;
  line-height: 1;
}

.page-faq .faq-item[open] summary::after {
  transform: rotate(45deg);
  color: var(--accent, #FF6B35);
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:focus-visible {
  background: rgba(0, 255, 127, 0.04);
  outline: none;
}

.page-faq .faq-item summary:focus-visible {
  box-shadow: inset 0 0 0 2px var(--primary, #00FF7F);
  border-radius: var(--faq-radius-sm, 8px);
}

.page-faq .faq-answer {
  padding: 4px 22px 22px 22px;
  font-family: var(--font-body, "Inter", Helvetica, Arial, sans-serif);
  font-size: var(--body, 1rem);
  line-height: var(--body-line, 1.6);
  color: var(--text-body, #B0BEC5);
  border-top: 1px solid rgba(0, 255, 127, 0.06);
}

.page-faq .faq-answer p {
  margin: 12px 0;
}

.page-faq .faq-answer a {
  color: var(--primary, #00FF7F);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.25s ease;
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--accent, #FF6B35);
}

.page-faq .faq-step-img {
  width: 300px;
  max-width: 100%;
  height: auto;
  border-radius: var(--faq-radius-sm, 8px);
  margin-top: var(--space-sm, 16px);
  border: 1px solid var(--faq-glass-border);
  box-shadow: var(--shadow-card, 0 8px 32px rgba(0,0,0,0.4));
  display: block;
}

/* ===== 桌面端宽屏（≥900px） ===== */
@media (min-width: 900px) {
  .page-faq .container {
    padding: var(--space-lg, 32px) var(--space-xl, 48px);
  }

  .page-faq .faq-layout {
    grid-template-columns: 220px 1fr;
    gap: var(--space-xl, 48px);
  }

  .page-faq .faq-categories {
    padding: var(--space-md, 24px);
    position: sticky;
    top: 32px;
  }

  .page-faq .category-list {
    flex-direction: column;
    gap: 4px;
  }

  .page-faq .cat-link {
    padding: 12px 16px;
    font-size: 1rem;
    white-space: normal;
    width: 100%;
  }

  .page-faq .faq-hero-inner {
    flex-wrap: nowrap;
  }

  .page-faq .faq-hero-icon {
    width: 120px;
    height: 120px;
  }

  .page-faq .search-box-wrap {
    max-width: 560px;
  }
}

/* ===== 大桌面（≥1200px） ===== */
@media (min-width: 1200px) {
  .page-faq .faq-layout {
    grid-template-columns: 260px 1fr;
    gap: 56px;
  }

  .page-faq .faq-categories {
    padding: var(--space-lg, 32px);
  }

  .page-faq .cat-link {
    font-size: 1.05rem;
    padding: 14px 20px;
  }

  .page-faq .faq-hero-text .h1 {
    font-size: 3rem;
  }
}

/* ===== 移动端微调（<600px） ===== */
@media (max-width: 599px) {
  .page-faq .faq-hero-icon {
    width: 80px;
    height: 80px;
  }

  .page-faq .faq-hero-text .h1 {
    font-size: 1.8rem;
  }

  .page-faq .faq-categories {
    padding: 10px 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(0,255,127,0.2) transparent;
  }

  .page-faq .faq-categories::-webkit-scrollbar {
    height: 4px;
  }

  .page-faq .faq-categories::-webkit-scrollbar-thumb {
    background: rgba(0,255,127,0.25);
    border-radius: 4px;
  }

  .page-faq .category-list {
    flex-wrap: nowrap;
    gap: 6px;
  }

  .page-faq .cat-link {
    padding: 8px 14px;
    font-size: 0.85rem;
  }

  .page-faq .faq-item summary {
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  .page-faq .faq-answer {
    padding: 2px 16px 16px 16px;
    font-size: 0.95rem;
  }

  .page-faq .faq-step-img {
    width: 100%;
  }

  .page-faq .search-input {
    padding: 14px 16px 14px 46px;
    font-size: 0.95rem;
  }

  .page-faq .search-icon {
    left: 14px;
    font-size: 1.4rem;
  }
}