.page-faq {
  --faq-border-glow: var(--border-highlight, #00D4FF);
  --faq-accent-fire: var(--accent-blood-orange, #FF4500);
  --faq-card-bg: var(--bg-card, #1F2833);
  --faq-bg-deep: var(--bg-dark, #0B0C10);
  --faq-text-light: var(--text-primary, #FFFFFF);
  --faq-text-muted: var(--text-secondary, #C5C6C7);
  --faq-shadow-hard: var(--shadow-hard, 6px 6px 0px 0px #FF4500);
  --faq-hover-glow: var(--hover-glow, rgba(0, 212, 255, 0.6));
  --faq-font-head: var(--font-heading, 'Orbitron', 'Rajdhani', sans-serif);
  --faq-font-body: var(--font-body, 'Exo 2', 'Source Sans Pro', sans-serif);
  display: block;
  width: 100%;
  background-color: var(--faq-bg-deep);
  color: var(--faq-text-light);
  font-family: var(--faq-font-body);
  line-height: 1.8;
  position: relative;
}

/* 滚动进度条 */
.page-faq .faq-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 4px;
  background: linear-gradient(90deg, var(--faq-border-glow), var(--faq-accent-fire));
  z-index: 1000;
  transition: width 0.1s linear;
  pointer-events: none;
}

/* 内部容器 */
.page-faq .faq-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 1rem 3rem;
}

/* 面包屑 */
.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  font-size: 0.85rem;
  color: var(--faq-text-muted);
  border-bottom: 2px solid rgba(0, 212, 255, 0.15);
  margin-bottom: 1.5rem;
}
.page-faq .faq-breadcrumb a {
  color: var(--faq-border-glow);
  text-decoration: none;
  transition: color 0.2s, text-shadow 0.2s;
}
.page-faq .faq-breadcrumb a:hover,
.page-faq .faq-breadcrumb a:focus-visible {
  color: var(--faq-accent-fire);
  text-shadow: 0 0 8px var(--faq-hover-glow);
}
.page-faq .faq-breadcrumb-sep {
  color: var(--faq-text-muted);
  font-weight: 700;
}

/* Hero 区 */
.page-faq .faq-hero {
  padding: 1.5rem 0 2rem;
  border-left: 6px solid var(--faq-border-glow);
  padding-left: 1.25rem;
  margin-bottom: 2rem;
}
.page-faq .faq-hero h1 {
  font-family: var(--faq-font-head);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 3.2rem);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, var(--faq-border-glow), var(--faq-accent-fire));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}
.page-faq .faq-hero-sub {
  font-size: 1.1rem;
  color: var(--faq-text-muted);
  margin: 0;
  max-width: 600px;
}

/* 两列布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
}

/* 左侧索引 */
.page-faq .faq-index {
  order: -1;
}
.page-faq .faq-index-inner {
  background-color: var(--faq-card-bg);
  border: var(--border-thick, 3px) solid rgba(0, 212, 255, 0.25);
  box-shadow: var(--faq-shadow-hard);
  padding: 1.5rem 1.25rem;
  position: sticky;
  top: 1rem;
}
.page-faq .faq-index-title {
  font-family: var(--faq-font-head);
  font-weight: 700;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--faq-border-glow);
  margin: 0 0 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid rgba(255, 69, 0, 0.3);
}
.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-index-list > li {
  margin-bottom: 1.25rem;
}
.page-faq .faq-index-cat {
  display: block;
  font-family: var(--faq-font-head);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--faq-accent-fire);
  margin-bottom: 0.4rem;
}
.page-faq .faq-index-sublist {
  list-style: none;
  margin: 0 0 0 0.5rem;
  padding: 0;
}
.page-faq .faq-index-sublist li {
  margin-bottom: 0.3rem;
}
.page-faq .faq-index-sublist a {
  display: inline-block;
  color: var(--faq-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 0.2rem 0.4rem;
  border-left: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s, background-color 0.2s;
}
.page-faq .faq-index-sublist a:hover,
.page-faq .faq-index-sublist a:focus-visible {
  color: var(--faq-text-light);
  border-left-color: var(--faq-border-glow);
  background-color: rgba(0, 212, 255, 0.08);
  text-shadow: 0 0 6px var(--faq-hover-glow);
}
.page-faq .faq-index-cta {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}
.page-faq .faq-index-cta-text {
  font-size: 0.9rem;
  color: var(--faq-text-muted);
  margin: 0 0 0.75rem;
}

/* 右侧答案区 */
.page-faq .faq-answers {
  min-width: 0;
}

/* 问答区块 */
.page-faq .faq-section {
  margin-bottom: 3rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px dashed rgba(0, 212, 255, 0.15);
}
.page-faq .faq-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}
.page-faq .faq-section-title {
  font-family: var(--faq-font-head);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin: 0 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--faq-text-light);
  border-bottom: 3px solid var(--faq-border-glow);
  padding-bottom: 0.6rem;
}
.page-faq .faq-section-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background-color: var(--faq-accent-fire);
  color: var(--faq-bg-deep);
  font-family: var(--faq-font-head);
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(255, 69, 0, 0.4);
}
.page-faq .faq-section-intro {
  background-color: rgba(0, 212, 255, 0.06);
  border-left: 4px solid var(--faq-border-glow);
  padding: 0.8rem 1rem;
  margin: -0.5rem 0 1.25rem;
  font-size: 0.95rem;
  color: var(--faq-text-muted);
}

/* 折叠卡片 */
.page-faq .faq-card {
  margin-bottom: 0.75rem;
  background-color: var(--faq-card-bg);
  border: var(--border-thick, 3px) solid rgba(0, 212, 255, 0.12);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-faq .faq-card:hover {
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.08);
}
.page-faq .faq-card-toggle {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}
.page-faq .faq-card-question {
  display: block;
  padding: 1rem 3rem 1rem 1.25rem;
  font-family: var(--faq-font-head);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.5px;
  color: var(--faq-text-light);
  cursor: pointer;
  position: relative;
  transition: background-color 0.25s, color 0.25s;
  user-select: none;
  border-bottom: 1px solid transparent;
}
.page-faq .faq-card-question::after {
  content: "+";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--faq-border-glow);
  transition: transform 0.3s, color 0.3s;
  line-height: 1;
}
.page-faq .faq-card-question:hover,
.page-faq .faq-card-question:focus-visible {
  background-color: rgba(0, 212, 255, 0.06);
  color: var(--faq-border-glow);
}
.page-faq .faq-card-question:hover::after {
  color: var(--faq-accent-fire);
  transform: translateY(-50%) scale(1.2);
}
.page-faq .faq-card-toggle:checked + .faq-card-question {
  border-bottom-color: rgba(0, 212, 255, 0.2);
  background-color: rgba(0, 212, 255, 0.04);
}
.page-faq .faq-card-toggle:checked + .faq-card-question::after {
  content: "−";
  color: var(--faq-accent-fire);
  transform: translateY(-50%) rotate(0deg);
}
.page-faq .faq-card-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 1.25rem;
  color: var(--faq-text-muted);
  font-size: 0.95rem;
  background-color: rgba(0, 0, 0, 0.15);
}
.page-faq .faq-card-toggle:checked ~ .faq-card-answer {
  max-height: 600px;
  padding: 1rem 1.25rem 1.25rem;
}
.page-faq .faq-card-answer a {
  color: var(--faq-border-glow);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.page-faq .faq-card-answer a:hover {
  color: var(--faq-accent-fire);
}

/* 图片区 */
.page-faq .faq-figure {
  margin: 1.5rem 0 0.5rem;
  padding: 0.75rem;
  border: 2px solid rgba(255, 69, 0, 0.2);
  background-color: rgba(31, 40, 51, 0.5);
  display: inline-block;
  max-width: 100%;
}
.page-faq .faq-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid rgba(0, 212, 255, 0.15);
}
.page-faq .faq-figure figcaption {
  font-size: 0.8rem;
  color: var(--faq-text-muted);
  margin-top: 0.5rem;
  text-align: center;
  font-style: italic;
  letter-spacing: 0.3px;
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 768px) {
  .page-faq .faq-inner {
    padding: 1.5rem 2rem 4rem;
  }
  .page-faq .faq-layout {
    grid-template-columns: 280px 1fr;
    gap: 2.5rem;
  }
  .page-faq .faq-index {
    order: 0;
  }
  .page-faq .faq-index-inner {
    padding: 1.75rem 1.5rem;
  }
  .page-faq .faq-hero {
    padding: 2rem 0 2.5rem;
    padding-left: 1.75rem;
    margin-bottom: 2.5rem;
  }
  .page-faq .faq-card-question {
    padding: 1.1rem 3.5rem 1.1rem 1.5rem;
    font-size: 1.05rem;
  }
  .page-faq .faq-card-answer {
    padding: 0 1.5rem;
  }
  .page-faq .faq-card-toggle:checked ~ .faq-card-answer {
    padding: 1rem 1.5rem 1.25rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.6rem;
  }
  .page-faq .faq-section-icon {
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.1rem;
  }
}

/* ===== 桌面大屏 ===== */
@media (min-width: 1024px) {
  .page-faq .faq-inner {
    padding: 2rem 2.5rem 5rem;
  }
  .page-faq .faq-layout {
    grid-template-columns: 300px 1fr;
    gap: 3rem;
  }
  .page-faq .faq-hero h1 {
    font-size: 3rem;
  }
  .page-faq .faq-index-inner {
    padding: 2rem 1.75rem;
  }
  .page-faq .faq-card {
    margin-bottom: 0.9rem;
  }
}

/* ===== 确保窄屏不溢出 ===== */
.page-faq * {
  box-sizing: border-box;
}
.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ===== 滚动显现动画（渐进增强） ===== */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.page-faq [data-reveal][data-revealed] {
  opacity: 1;
  transform: translateY(0);
}
.page-faq [data-reveal][data-revealed] .faq-section-icon {
  animation: faq-pulse-glow 0.8s ease-out;
}
@keyframes faq-pulse-glow {
  0% { box-shadow: 0 0 0 0 rgba(255, 69, 0, 0.6); }
  70% { box-shadow: 0 0 20px 8px rgba(255, 69, 0, 0.2); }
  100% { box-shadow: 0 0 12px rgba(255, 69, 0, 0.4); }
}

/* ===== 聚焦可见 ===== */
.page-faq a:focus-visible,
.page-faq .faq-card-question:focus-visible {
  outline: 2px dashed var(--faq-border-glow);
  outline-offset: 4px;
}
.page-faq .faq-card-toggle:focus-visible + .faq-card-question {
  outline: 2px dashed var(--faq-border-glow);
  outline-offset: 2px;
}