.page-faq {
  --faq-bg-texture: rgba(255, 255, 255, 0.02);
  --faq-card-gap: 1.2rem;
  --faq-icon-size: 24px;
  display: block;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--space-md, 1rem) var(--space-md, 1rem) var(--space-xl, 4rem);
  color: var(--text-primary, #ffffff);
  background: var(--faq-bg-texture);
  min-height: 60vh;
}

/* 面包屑 */
.page-faq .breadcrumb {
  font-family: var(--font-body, 'Roboto', sans-serif);
  font-size: 0.875rem;
  color: var(--text-secondary, #a0b0c0);
  margin-bottom: var(--space-lg, 2rem);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-faq .breadcrumb a {
  color: var(--link-color, #39ff14);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover {
  text-decoration: underline;
}

.page-faq .breadcrumb span[aria-hidden="true"] {
  color: var(--secondary-accent, #c0c0c0);
}

/* 简介区 */
.page-faq .faq-intro {
  margin-bottom: var(--space-xl, 4rem);
}

.page-faq .faq-intro h1 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-size: var(--headline-size-lg, 3.5rem);
  line-height: 1.1;
  letter-spacing: var(--letter-spacing-headline, -0.02em);
  margin-bottom: var(--space-md, 1rem);
  background: linear-gradient(135deg, var(--text-primary, #ffffff), var(--primary-accent, #39ff14));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-faq .faq-intro p {
  font-family: var(--font-body, 'Roboto', sans-serif);
  font-size: 1.125rem;
  color: var(--text-secondary, #a0b0c0);
  max-width: 700px;
  line-height: 1.6;
}

/* Q&A 分区 */
.page-faq .qanda {
  margin-bottom: var(--space-xl, 4rem);
}

.page-faq .qanda h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-size: var(--headline-size-md, 2rem);
  letter-spacing: var(--letter-spacing-headline, -0.02em);
  margin-bottom: var(--space-lg, 2rem);
  color: var(--primary-accent, #39ff14);
  position: relative;
  display: inline-block;
}

.page-faq .qanda h2::after {
  content: '';
  display: block;
  width: 60%;
  height: 3px;
  background: var(--primary-accent, #39ff14);
  margin-top: 0.3rem;
  transition: width 0.3s ease;
}

.page-faq .qanda-list {
  display: flex;
  flex-direction: column;
  gap: var(--faq-card-gap);
}

/* 问题卡片 */
.page-faq .question-card {
  background: var(--card-bg, rgba(255, 255, 255, 0.05));
  border: var(--card-border, 1px solid rgba(57, 255, 20, 0.3));
  border-radius: 8px;
  overflow: hidden;
  transition: transform var(--transition-speed, 0.3s) ease, box-shadow var(--transition-speed, 0.3s) ease;
  position: relative;
}

.page-faq .question-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(57, 255, 20, 0.1);
}

/* 隐藏 checkbox */
.page-faq .faq-toggle {
  position: absolute;
  opacity: 0;
  height: 0;
  width: 0;
}

/* label 样式（可点击区域） */
.page-faq .faq-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  cursor: pointer;
  font-family: var(--font-body, 'Roboto', sans-serif);
  font-weight: 500;
  font-size: 1.05rem;
  color: var(--text-primary, #ffffff);
  background: transparent;
  transition: background var(--transition-speed, 0.3s) ease;
  user-select: none;
}

.page-faq .faq-label:hover {
  background: rgba(57, 255, 20, 0.05);
}

/* 图标 */
.page-faq .faq-icon {
  width: var(--faq-icon-size);
  height: var(--faq-icon-size);
  flex-shrink: 0;
  border-radius: 4px;
  background: var(--primary-accent, #39ff14);
  object-fit: contain;
  transition: transform var(--transition-speed, 0.3s) ease;
}

/* checkbox 选中时图标旋转 */
.page-faq .faq-toggle:checked + .faq-label .faq-icon {
  transform: rotate(45deg);
}

/* 答案区域 */
.page-faq .faq-answer {
  max-height: 0;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.03);
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 1.2rem;
  font-family: var(--font-body, 'Roboto', sans-serif);
  font-size: 0.95rem;
  color: var(--text-secondary, #a0b0c0);
  line-height: 1.6;
  border-top: 1px solid transparent;
}

.page-faq .faq-answer p {
  margin: 0.8rem 0;
}

.page-faq .faq-answer a {
  color: var(--link-color, #39ff14);
  text-decoration: none;
}

.page-faq .faq-answer a:hover {
  text-decoration: underline;
}

/* 展开状态 */
.page-faq .faq-toggle:checked ~ .faq-answer {
  max-height: 300px;
  padding: 0.8rem 1.2rem;
  border-top-color: rgba(57, 255, 20, 0.2);
}

/* 技术支持区 */
.page-faq .support {
  margin-top: var(--space-lg, 2rem);
}

.page-faq .support h2 {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-size: var(--headline-size-md, 2rem);
  letter-spacing: var(--letter-spacing-headline, -0.02em);
  margin-bottom: var(--space-md, 1rem);
  color: var(--primary-accent, #39ff14);
  position: relative;
  display: inline-block;
}

.page-faq .support h2::after {
  content: '';
  display: block;
  width: 60%;
  height: 3px;
  background: var(--primary-accent, #39ff14);
  margin-top: 0.3rem;
  transition: width 0.3s ease;
}

.page-faq .support-card {
  background: var(--card-bg, rgba(255, 255, 255, 0.05));
  border: var(--card-border, 1px solid rgba(57, 255, 20, 0.3));
  border-radius: 12px;
  padding: var(--space-lg, 2rem);
  position: relative;
  overflow: hidden;
}

.page-faq .support-texture {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}

.page-faq .support-card p {
  position: relative;
  z-index: 1;
  font-family: var(--font-body, 'Roboto', sans-serif);
  font-size: 1rem;
  color: var(--text-secondary, #a0b0c0);
  line-height: 1.6;
  margin-bottom: var(--space-md, 1rem);
}

.page-faq .support-card ul {
  position: relative;
  z-index: 1;
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem var(--space-lg, 2rem);
  margin-bottom: var(--space-md, 1rem);
}

.page-faq .support-card li {
  font-family: var(--font-body, 'Roboto', sans-serif);
  font-size: 1rem;
  color: var(--text-primary, #ffffff);
}

.page-faq .support-card a {
  color: var(--link-color, #39ff14);
  text-decoration: none;
  font-weight: 500;
}

.page-faq .support-card a:hover {
  text-decoration: underline;
}

/* 滚动显现组件 */
.page-faq .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-faq .reveal[data-visible="true"] {
  opacity: 1;
  transform: translateY(0);
}

/* 卡片共享样式 */
.page-faq .card {
  background: var(--card-bg, rgba(255, 255, 255, 0.05));
  border: var(--card-border, 1px solid rgba(57, 255, 20, 0.3));
  border-radius: 12px;
}

/* 移动端优先 */
@media (max-width: 640px) {
  .page-faq {
    padding: var(--space-md, 1rem) 0.75rem var(--space-xl, 4rem);
  }

  .page-faq .faq-intro h1 {
    font-size: 2.2rem;
  }

  .page-faq .faq-intro p {
    font-size: 1rem;
  }

  .page-faq .faq-label {
    font-size: 0.95rem;
    padding: 0.85rem 1rem;
  }

  .page-faq .faq-answer {
    font-size: 0.9rem;
  }

  .page-faq .faq-icon {
    width: 20px;
    height: 20px;
  }

  .page-faq .support-card {
    padding: var(--space-md, 1rem);
  }

  .page-faq .support-card ul {
    flex-direction: column;
    gap: 0.5rem;
  }

  .page-faq .breadcrumb {
    font-size: 0.8rem;
    margin-bottom: var(--space-md, 1rem);
  }
}

/* 桌面端 */
@media (min-width: 768px) {
  .page-faq .qanda-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--faq-card-gap);
  }

  .page-faq .faq-answer {
    font-size: 0.95rem;
  }

  .page-faq .support-card {
    max-width: 700px;
  }
}

/* 大桌面 */
@media (min-width: 1200px) {
  .page-faq .qanda-list {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .question-card {
    transition: none;
  }

  .page-faq .faq-icon {
    transition: none;
  }

  .page-faq .faq-answer {
    transition: none;
  }

  .page-faq .reveal {
    transition: none;
    opacity: 1;
    transform: none;
  }

  .page-faq .faq-toggle:checked + .faq-label .faq-icon {
    transform: rotate(45deg);
  }

  .page-faq .question-card:hover {
    transform: none;
  }
}

.page-faq {
  --headline-size-lg: 1rem;
  --headline-size-md: 1rem;
  --letter-spacing-headline: normal;
  --link-color: currentColor;
}