/* ===== 页面 faq 专属样式 ===== */
.page-faq {
  --faq-hero-min-height: 240px;
  --faq-sidebar-width: 180px;
  --faq-item-radius: 10px;
  --faq-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --faq-grid-color: rgba(255, 255, 255, 0.03);
  --faq-glow-accent: 0 0 16px rgba(255, 107, 53, 0.35);
  display: block;
  width: 100%;
  background-color: var(--color-bg, #0D1117);
  color: var(--color-text, #FFFFFF);
  font-family: var(--font-body, 'Roboto Condensed', Arial, sans-serif);
  line-height: 1.6;
}

/* ===== 顶部英雄区 ===== */
.page-faq .faq-hero {
  position: relative;
  min-height: var(--faq-hero-min-height);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background-color: var(--color-primary-darker, #062050);
}

.page-faq .faq-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

.page-faq .faq-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(6, 32, 80, 0.85) 0%, rgba(13, 17, 23, 0.75) 100%);
}

.page-faq .faq-hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--content-max-width, 1200px);
  padding: var(--space-xl, 32px) var(--space-md, 16px);
  text-align: center;
}

.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs, 4px);
  margin-bottom: var(--space-md, 16px);
  font-size: 0.85rem;
  font-family: var(--font-body, 'Roboto Condensed', Arial, sans-serif);
  color: var(--color-text-secondary, #B0B8C5);
}

.page-faq .faq-breadcrumb-link {
  color: var(--color-accent, #FF6B35);
  text-decoration: none;
  transition: opacity var(--transition-speed, 0.3s);
}
.page-faq .faq-breadcrumb-link:hover,
.page-faq .faq-breadcrumb-link:focus-visible {
  opacity: 0.8;
  text-decoration: underline;
}

.page-faq .faq-breadcrumb-sep {
  color: var(--color-text-secondary, #B0B8C5);
  margin: 0 var(--space-xs, 4px);
}

.page-faq .faq-breadcrumb-current {
  color: var(--color-text, #FFFFFF);
  font-weight: 600;
}

.page-faq .faq-hero-title {
  font-family: var(--font-heading, 'Inter', system-ui, sans-serif);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-sm, 8px);
  color: var(--color-text, #FFFFFF);
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
  /* 动态倾斜切割效果 */
  display: inline-block;
  transform: skewX(-2deg);
  background: linear-gradient(135deg, var(--color-text, #FFFFFF) 60%, var(--color-accent, #FF6B35) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-faq .faq-hero-desc {
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  color: var(--color-text-secondary, #B0B8C5);
  margin: 0 auto var(--space-lg, 24px);
  max-width: 600px;
  font-weight: 400;
}

.page-faq .faq-search {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
}

.page-faq .faq-search-input {
  width: 100%;
  padding: 12px 20px 12px 44px;
  border: 2px solid var(--color-surface-glass, rgba(10, 61, 145, 0.15));
  border-radius: 50px;
  background: rgba(13, 17, 23, 0.7);
  backdrop-filter: blur(8px);
  color: var(--color-text, #FFFFFF);
  font-family: var(--font-body, 'Roboto Condensed', Arial, sans-serif);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition-speed, 0.3s), box-shadow var(--transition-speed, 0.3s);
  box-sizing: border-box;
}

.page-faq .faq-search-input::placeholder {
  color: var(--color-text-secondary, #B0B8C5);
  opacity: 0.7;
}

.page-faq .faq-search-input:focus {
  border-color: var(--color-accent, #FF6B35);
  box-shadow: var(--faq-glow-accent);
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  color: var(--color-text-secondary, #B0B8C5);
  pointer-events: none;
}

/* ===== 主内容区 ===== */
.page-faq .faq-main {
  display: flex;
  flex-direction: column;
  max-width: var(--content-max-width, 1200px);
  margin: 0 auto;
  padding: var(--space-2xl, 48px) var(--space-md, 16px) var(--space-3xl, 64px);
  gap: var(--space-xl, 32px);
  /* 深色网格背景 */
  background-image:
    linear-gradient(var(--faq-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
}

/* ===== 分类导航 (竖向) ===== */
.page-faq .faq-categories {
  display: flex;
  flex-direction: row;
  gap: var(--space-sm, 8px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: var(--space-xs, 4px) 0;
  flex-shrink: 0;
}

.page-faq .faq-categories::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-category {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding: var(--space-sm, 8px) var(--space-md, 16px);
  border: var(--glass-border, 1px solid rgba(255,255,255,0.08));
  border-radius: 50px;
  background: var(--color-surface-glass, rgba(10, 61, 145, 0.15));
  backdrop-filter: blur(8px);
  color: var(--color-text-secondary, #B0B8C5);
  font-family: var(--font-heading, 'Inter', system-ui, sans-serif);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-speed, 0.3s);
  user-select: none;
  flex-shrink: 0;
}

.page-faq .faq-category:hover,
.page-faq .faq-category:focus-visible {
  color: var(--color-text, #FFFFFF);
  border-color: var(--color-primary, #0A3D91);
  box-shadow: var(--neon-glow, 0 0 12px rgba(10,61,145,0.5));
}

.page-faq .faq-category.active {
  background: var(--color-accent, #FF6B35);
  border-color: var(--color-accent, #FF6B35);
  color: #FFFFFF;
  box-shadow: var(--faq-glow-accent);
}

.page-faq .faq-cat-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  border-radius: 50%;
  flex-shrink: 0;
  display: block;
}

.page-faq .faq-cat-label {
  font-size: 0.9rem;
  line-height: 1.2;
}

/* ===== 手风琴内容区 ===== */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-category-content {
  display: none;
  animation: faqFadeIn 0.4s ease-out;
}

.page-faq .faq-category-content.active {
  display: block;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-category-heading {
  font-family: var(--font-heading, 'Inter', system-ui, sans-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  margin: 0 0 var(--space-lg, 24px);
  color: var(--color-text, #FFFFFF);
  padding-bottom: var(--space-sm, 8px);
  border-bottom: 2px solid var(--color-accent, #FF6B35);
  display: inline-block;
  transform: skewX(-1deg);
}

/* ===== 单个问答项 ===== */
.page-faq .faq-item {
  border: var(--glass-border, 1px solid rgba(255,255,255,0.08));
  border-radius: var(--faq-item-radius);
  background: var(--color-surface-glass, rgba(10, 61, 145, 0.15));
  backdrop-filter: blur(8px);
  margin-bottom: var(--space-md, 16px);
  overflow: hidden;
  transition: border-color var(--transition-speed, 0.3s), box-shadow var(--transition-speed, 0.3s);
}

.page-faq .faq-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.page-faq .faq-item[open] {
  border-color: var(--color-accent, #FF6B35);
  box-shadow: var(--faq-glow-accent);
}

.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  padding: var(--space-md, 16px) var(--space-lg, 24px);
  font-family: var(--font-heading, 'Inter', system-ui, sans-serif);
  font-weight: 600;
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
  color: var(--color-text, #FFFFFF);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color var(--transition-speed, 0.3s);
  position: relative;
}

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

.page-faq .faq-question::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary, #0A3D91);
  color: #FFFFFF;
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: transform var(--faq-transition), background var(--transition-speed, 0.3s);
  line-height: 1;
}

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

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

.page-faq .faq-item[open] .faq-question {
  color: var(--color-accent, #FF6B35);
}

.page-faq .faq-answer {
  padding: 0 var(--space-lg, 24px) var(--space-lg, 24px) calc(var(--space-lg, 24px) + 32px);
  font-size: clamp(0.9rem, 1vw, 1rem);
  color: var(--color-text-secondary, #B0B8C5);
  line-height: 1.7;
}

.page-faq .faq-answer p {
  margin: 0 0 var(--space-sm, 8px);
}

.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer a {
  color: var(--color-accent, #FF6B35);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--transition-speed, 0.3s);
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  opacity: 0.8;
}

/* ===== 桌面端：侧边栏布局 ===== */
@media (min-width: 768px) {
  .page-faq .faq-hero {
    min-height: 280px;
  }

  .page-faq .faq-hero-content {
    padding: var(--space-2xl, 48px) var(--space-xl, 32px);
  }

  .page-faq .faq-main {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--space-2xl, 48px);
    padding: var(--space-3xl, 64px) var(--space-xl, 32px);
  }

  .page-faq .faq-categories {
    flex-direction: column;
    width: var(--faq-sidebar-width);
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height, 64px) + var(--space-md, 16px));
    gap: var(--space-sm, 8px);
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-category {
    border-radius: var(--radius-md, 8px);
    padding: var(--space-md, 16px);
    white-space: normal;
    width: 100%;
    box-sizing: border-box;
  }

  .page-faq .faq-cat-icon {
    width: 28px;
    height: 28px;
  }

  .page-faq .faq-category-heading {
    font-size: 1.5rem;
  }

  .page-faq .faq-question {
    padding: var(--space-md, 16px) var(--space-xl, 32px);
    font-size: 1.05rem;
  }

  .page-faq .faq-answer {
    padding: 0 var(--space-xl, 32px) var(--space-xl, 32px) calc(var(--space-xl, 32px) + 32px);
  }
}

/* ===== 大屏额外优化 ===== */
@media (min-width: 1024px) {
  .page-faq .faq-hero {
    min-height: 320px;
  }

  .page-faq .faq-hero-title {
    font-size: 3.2rem;
  }

  .page-faq .faq-main {
    gap: var(--space-3xl, 64px);
  }

  .page-faq .faq-categories {
    width: 200px;
  }

  .page-faq .faq-category {
    font-size: 1rem;
    padding: var(--space-md, 16px) var(--space-lg, 24px);
  }

  .page-faq .faq-cat-icon {
    width: 32px;
    height: 32px;
  }
}

/* ===== 窄屏安全间距 ===== */
@media (max-width: 380px) {
  .page-faq .faq-hero-content {
    padding: var(--space-lg, 24px) var(--space-sm, 8px);
  }

  .page-faq .faq-main {
    padding: var(--space-lg, 24px) var(--space-sm, 8px);
  }

  .page-faq .faq-question {
    padding: var(--space-sm, 8px) var(--space-md, 16px);
    font-size: 0.9rem;
  }

  .page-faq .faq-answer {
    padding: 0 var(--space-md, 16px) var(--space-md, 16px) calc(var(--space-md, 16px) + 28px);
    font-size: 0.85rem;
  }
}