/* ===== page-faq 专属样式 ===== */
.page-faq {
  --faq-number-size: 3.2rem;
  --faq-border-radius: 8px;
  --faq-transition: 0.35s ease;
  --faq-gap: 1.2rem;
  --faq-nav-width: 220px;
  background-color: var(--color-primary-dark-green, #1a3c2a);
  color: var(--color-text-white, #ffffff);
  position: relative;
  padding: 2rem 1rem 4rem;
  min-height: 70vh;
}

/* 滚动进度条 */
.page-faq .scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 0%;
  height: var(--scroll-progress-height, 4px);
  background: linear-gradient(90deg, var(--color-accent-dark-gold, #b8860b), var(--color-accent-neon-green, #39ff14));
  z-index: 10;
  transition: width 0.1s linear;
}

/* 面包屑 */
.page-faq .faq-breadcrumb {
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 0.85rem;
  color: var(--color-accent-dark-gold, #b8860b);
  margin-bottom: 1.5rem;
  opacity: 0.85;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.page-faq .faq-breadcrumb a {
  color: var(--color-accent-dark-gold, #b8860b);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--faq-transition);
}
.page-faq .faq-breadcrumb a:hover,
.page-faq .faq-breadcrumb a:focus {
  border-bottom-color: var(--color-accent-neon-green, #39ff14);
}
.page-faq .faq-breadcrumb-sep {
  color: var(--color-accent-dark-gold, #b8860b);
  font-size: 1.1rem;
  line-height: 1;
}

/* Hero 区域 */
.page-faq .faq-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.page-faq .faq-hero-text {
  flex: 1 1 240px;
}
.page-faq .faq-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--color-accent-dark-gold, #b8860b);
  margin: 0 0 0.4rem;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.page-faq .faq-subtitle {
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 1rem;
  color: var(--color-text-white, #ffffff);
  opacity: 0.8;
  margin: 0;
}
.page-faq .faq-hero-image {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-faq .faq-hero-img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border: 2px solid var(--color-accent-dark-gold, #b8860b);
  border-radius: var(--faq-border-radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  background-color: var(--color-background-cream, #f5f0e1);
}

/* 主布局 */
.page-faq .faq-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
}

/* 侧栏导航 */
.page-faq .faq-nav {
  flex: 0 0 var(--faq-nav-width);
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-accent-dark-gold, #b8860b);
  border-radius: var(--faq-border-radius);
  padding: 1.2rem 0.8rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  position: sticky;
  top: calc(var(--header-height, 70px) + 1.5rem);
}
.page-faq .faq-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.page-faq .faq-nav-link {
  display: block;
  padding: 0.6rem 0.8rem;
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 0.95rem;
  color: var(--color-accent-dark-gold, #b8860b);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background-color var(--faq-transition), border-color var(--faq-transition), color var(--faq-transition);
  border-radius: 0 4px 4px 0;
}
.page-faq .faq-nav-link:hover,
.page-faq .faq-nav-link:focus {
  background-color: rgba(57, 255, 20, 0.08);
  border-left-color: var(--color-accent-neon-green, #39ff14);
  color: var(--color-accent-neon-green, #39ff14);
}
.page-faq .faq-nav-link:focus-visible {
  outline: 2px solid var(--color-accent-neon-green, #39ff14);
  outline-offset: 2px;
}

/* 内容区 */
.page-faq .faq-content {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2.8rem;
}

/* 每个章节 */
.page-faq .faq-section {
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: var(--faq-border-radius);
  padding: 1.5rem 1.2rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: border-color var(--faq-transition);
}
.page-faq .faq-section:hover {
  border-color: rgba(212, 175, 55, 0.5);
}

/* 章节标题 */
.page-faq .faq-section-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.6rem;
  color: var(--color-accent-dark-gold, #b8860b);
  margin: 0 0 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  line-height: 1.2;
}
.page-faq .faq-section-number {
  font-family: var(--font-data, 'Oswald', sans-serif);
  font-size: var(--faq-number-size);
  color: var(--color-accent-dark-gold, #b8860b);
  line-height: 1;
  opacity: 0.7;
  flex-shrink: 0;
}
.page-faq .faq-section-desc {
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 0.92rem;
  color: var(--color-text-white, #ffffff);
  opacity: 0.7;
  margin: 0 0 1.2rem;
  padding-left: calc(var(--faq-number-size) + 0.6rem);
}
.page-faq .faq-section-desc p {
  margin: 0;
}

/* 章节内图片 */
.page-faq .faq-section-img {
  margin: 1.2rem 0 0.8rem;
  display: flex;
  justify-content: center;
}
.page-faq .faq-steps-img,
.page-faq .faq-devices-img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--color-accent-dark-gold, #b8860b);
  border-radius: 6px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  background-color: var(--color-background-cream, #f5f0e1);
}

/* 折叠面板项 */
.page-faq .faq-item {
  display: block;
  margin-bottom: 0.6rem;
  background-color: rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: 6px;
  transition: border-color var(--faq-transition), box-shadow var(--faq-transition);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
  overflow: hidden;
}
.page-faq .faq-item[open] {
  border-color: var(--color-accent-dark-gold, #b8860b);
  box-shadow: 0 0 12px rgba(57, 255, 20, 0.08);
}
.page-faq .faq-item:hover {
  border-color: rgba(212, 175, 55, 0.5);
}

/* 问题行 */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1rem;
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-white, #ffffff);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background-color var(--faq-transition);
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question::marker {
  display: none;
  content: '';
}
.page-faq .faq-question:hover {
  background-color: rgba(57, 255, 20, 0.05);
}
.page-faq .faq-question:focus-visible {
  outline: 2px solid var(--color-accent-neon-green, #39ff14);
  outline-offset: -2px;
}

/* 箭头指示器 */
.page-faq .faq-question::after {
  content: '▾';
  margin-left: auto;
  font-size: 1.1rem;
  color: var(--color-accent-dark-gold, #b8860b);
  transition: transform var(--faq-transition);
  flex-shrink: 0;
}
.page-faq .faq-item[open] > .faq-question::after {
  transform: rotate(180deg);
}

/* Q图标 */
.page-faq .faq-q-icon {
  font-family: var(--font-data, 'Oswald', sans-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent-neon-green, #39ff14);
  background-color: rgba(57, 255, 20, 0.1);
  width: 1.8rem;
  height: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
  border: 1px solid var(--color-accent-neon-green, #39ff14);
}

/* 答案区 */
.page-faq .faq-answer {
  padding: 0 1rem 0.9rem calc(1rem + 2.4rem);
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 0.92rem;
  color: var(--color-text-white, #ffffff);
  opacity: 0.88;
  line-height: 1.6;
  border-top: 1px solid rgba(212, 175, 55, 0.15);
  margin-top: 0;
}
.page-faq .faq-answer p {
  margin: 0.6rem 0 0;
}
.page-faq .faq-answer a {
  color: var(--color-accent-neon-green, #39ff14);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--faq-transition);
}
.page-faq .faq-answer a:hover {
  color: var(--color-accent-dark-gold, #b8860b);
}
.page-faq .faq-answer strong {
  color: var(--color-accent-dark-gold, #b8860b);
  font-weight: 600;
}

/* CTA 区域 */
.page-faq .faq-support-cta {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  background-color: rgba(57, 255, 20, 0.06);
  border: 1px solid var(--color-accent-dark-gold, #b8860b);
  border-radius: 6px;
  text-align: center;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
}
.page-faq .faq-support-cta p {
  margin: 0;
  font-family: var(--font-body, 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif);
  font-size: 0.95rem;
  color: var(--color-text-white, #ffffff);
}
.page-faq .faq-support-cta a {
  color: var(--color-accent-neon-green, #39ff14);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 600;
  transition: color var(--faq-transition);
}
.page-faq .faq-support-cta a:hover {
  color: var(--color-accent-dark-gold, #b8860b);
}

/* 回到顶部按钮 */
.page-faq .faq-back-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--color-accent-dark-gold, #b8860b);
  background-color: var(--color-primary-dark-green, #1a3c2a);
  border: 2px solid var(--color-accent-dark-gold, #b8860b);
  border-radius: 50%;
  text-decoration: none;
  z-index: 100;
  transition: background-color var(--faq-transition), color var(--faq-transition), border-color var(--faq-transition), transform var(--faq-transition);
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.4);
}
.page-faq .faq-back-top:hover,
.page-faq .faq-back-top:focus {
  background-color: var(--color-accent-dark-gold, #b8860b);
  color: var(--color-primary-dark-green, #1a3c2a);
  border-color: var(--color-accent-neon-green, #39ff14);
  transform: translateY(-4px);
}
.page-faq .faq-back-top:focus-visible {
  outline: 2px solid var(--color-accent-neon-green, #39ff14);
  outline-offset: 4px;
}

/* ===== 移动端优先适配 ===== */

/* 窄屏：侧栏变为水平滚动条，导航占用更少空间 */
@media (max-width: 768px) {
  .page-faq {
    padding: 1.2rem 0.8rem 3rem;
  }
  .page-faq .faq-title {
    font-size: 1.8rem;
  }
  .page-faq .faq-hero {
    gap: 1rem;
    margin-bottom: 1.5rem;
  }
  .page-faq .faq-hero-image {
    flex-basis: 100%;
    justify-content: flex-start;
  }
  .page-faq .faq-hero-img {
    width: 72px;
    height: 72px;
  }

  /* 侧栏导航：水平滚动 */
  .page-faq .faq-layout {
    flex-direction: column;
    gap: 1.2rem;
  }
  .page-faq .faq-nav {
    position: relative;
    top: auto;
    flex: none;
    width: 100%;
    padding: 0.6rem 0.4rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    clip-path: none;
    border-radius: 6px;
  }
  .page-faq .faq-nav-list {
    flex-direction: row;
    gap: 0.3rem;
    flex-wrap: nowrap;
    min-width: max-content;
  }
  .page-faq .faq-nav-link {
    font-size: 0.85rem;
    padding: 0.4rem 0.7rem;
    white-space: nowrap;
    border-left: none;
    border-bottom: 2px solid transparent;
    border-radius: 4px;
  }
  .page-faq .faq-nav-link:hover,
  .page-faq .faq-nav-link:focus {
    border-left-color: transparent;
    border-bottom-color: var(--color-accent-neon-green, #39ff14);
  }

  /* 内容区 */
  .page-faq .faq-content {
    gap: 1.8rem;
  }
  .page-faq .faq-section {
    padding: 1rem 0.8rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.3rem;
  }
  .page-faq .faq-section-number {
    font-size: 2.2rem;
  }
  .page-faq .faq-section-desc {
    padding-left: 0;
    font-size: 0.85rem;
  }
  .page-faq .faq-question {
    font-size: 0.92rem;
    padding: 0.7rem 0.8rem;
  }
  .page-faq .faq-q-icon {
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.95rem;
  }
  .page-faq .faq-answer {
    padding: 0 0.8rem 0.7rem calc(0.8rem + 2rem);
    font-size: 0.85rem;
  }
  .page-faq .faq-back-top {
    bottom: 1.2rem;
    right: 1rem;
    width: 2.6rem;
    height: 2.6rem;
    font-size: 1.3rem;
  }
  .page-faq .faq-support-cta {
    padding: 0.8rem;
    font-size: 0.88rem;
  }
  .page-faq .faq-section-img {
    margin: 0.8rem 0 0.4rem;
  }
}

/* 桌面端增强 */
@media (min-width: 1024px) {
  .page-faq {
    padding: 2.5rem 2rem 5rem;
  }
  .page-faq .faq-title {
    font-size: 3.2rem;
  }
  .page-faq .faq-subtitle {
    font-size: 1.1rem;
  }
  .page-faq .faq-layout {
    gap: 2.5rem;
  }
  .page-faq .faq-nav {
    padding: 1.5rem 1rem;
  }
  .page-faq .faq-nav-link {
    font-size: 1rem;
    padding: 0.7rem 1rem;
  }
  .page-faq .faq-section {
    padding: 2rem 1.8rem;
  }
  .page-faq .faq-section-title {
    font-size: 1.8rem;
  }
  .page-faq .faq-section-number {
    font-size: 3.6rem;
  }
  .page-faq .faq-question {
    font-size: 1.05rem;
    padding: 1rem 1.2rem;
  }
  .page-faq .faq-answer {
    font-size: 0.95rem;
    padding: 0 1.2rem 1rem calc(1.2rem + 2.4rem);
  }
  .page-faq .faq-back-top {
    bottom: 3rem;
    right: 2.5rem;
  }
}