.page-faq {
  --faq-bg: var(--color-bg);
  --faq-text: var(--color-text);
  --faq-border: var(--color-border);
  --faq-primary: var(--color-primary);
  --faq-accent: var(--color-accent);
  --faq-secondary: var(--color-secondary);
  --faq-highlight: var(--color-highlight);
  --faq-font-heading: var(--font-heading);
  --faq-font-body: var(--font-body);
  --faq-shadow: var(--shadow);
  --faq-border-width: var(--border-width);
  --faq-question-bg: var(--color-bg);
  --faq-question-hover-bg: var(--color-accent);
  --faq-question-active-bg: var(--color-primary);
}

/* 基础布局 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    flex-direction: row;
    padding: 2rem;
    gap: 3rem;
  }
}

/* 侧边栏索引 */
.page-faq .faq-sidebar {
  flex: 0 0 280px;
  background: var(--color-bg-dark);
  border: var(--faq-border-width) solid var(--faq-border);
  box-shadow: var(--faq-shadow);
  padding: 1.5rem;
  align-self: flex-start;
  position: sticky;
  top: 1rem;
}

@media (min-width: 1024px) {
  .page-faq .faq-sidebar {
    top: 2rem;
  }
}

.page-faq .faq-sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-faq .faq-index-heading {
  font-family: var(--faq-font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--faq-accent);
  margin: 0;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--faq-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.page-faq .faq-index-link {
  display: block;
  font-family: var(--faq-font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--faq-text);
  padding: 0.6rem 0.8rem;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color 0.2s, background-color 0.2s, color 0.2s;
  background: transparent;
}

.page-faq .faq-index-link:hover {
  border-left-color: var(--faq-primary);
  background: rgba(255, 107, 53, 0.1);
  color: var(--faq-primary);
}

.page-faq .faq-index-link:focus {
  outline: 2px solid var(--faq-primary);
  outline-offset: 2px;
}

/* CTA区域 */
.page-faq .faq-index-cta {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--faq-border);
  text-align: center;
}

.page-faq .faq-index-cta-text {
  font-family: var(--faq-font-body);
  font-size: 0.9rem;
  color: var(--faq-text);
  margin: 0 0 0.75rem;
}

/* 按钮 */
.page-faq .btn--primary {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  font-family: var(--faq-font-heading);
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--faq-primary);
  color: var(--color-bg);
  border: 2px solid var(--faq-primary);
  text-decoration: none;
  transition: background-color 0.2s, color 0.2s;
}

.page-faq .btn--primary:hover {
  background: transparent;
  color: var(--faq-primary);
}

/* 主内容区 */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

/* 面包屑 */
.page-faq .breadcrumb {
  font-family: var(--faq-font-body);
  font-size: 0.85rem;
  color: var(--faq-text);
  margin-bottom: 1.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--faq-border);
}

.page-faq .breadcrumb a {
  color: var(--faq-primary);
  text-decoration: none;
}

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

.page-faq .breadcrumb-sep {
  margin: 0 0.4rem;
  color: var(--faq-border);
}

/* 页面标题 */
.page-faq .faq-title {
  font-family: var(--faq-font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--faq-text);
  margin: 0 0 0.5rem;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

@media (min-width: 768px) {
  .page-faq .faq-title {
    font-size: 3.5rem;
  }
}

.page-faq .faq-subtitle {
  font-family: var(--faq-font-body);
  font-size: 1.1rem;
  color: var(--faq-text);
  margin: 0 0 2.5rem;
  line-height: 1.5;
}

/* 章节 */
.page-faq .faq-section {
  margin-bottom: 3rem;
  padding: 1.5rem;
  border: 2px solid var(--faq-border);
  background: var(--faq-bg);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-section-heading {
  font-family: var(--faq-font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--faq-secondary);
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--faq-accent);
  text-transform: uppercase;
}

@media (min-width: 768px) {
  .page-faq .faq-section-heading {
    font-size: 2rem;
  }
}

.page-faq .faq-section-intro {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .page-faq .faq-section-intro {
    flex-direction: row;
    align-items: flex-start;
    gap: 1.5rem;
  }
}

.page-faq .faq-section-intro p {
  font-family: var(--faq-font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--faq-text);
  margin: 0;
  flex: 1;
}

/* 图片容器 */
.page-faq .img-container.faq-img {
  flex-shrink: 0;
  width: 100%;
  max-width: 400px;
}

.page-faq .faq-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--faq-border);
  box-shadow: var(--faq-shadow);
}

/* 折叠列表 */
.page-faq .faq-list {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-faq .faq-item {
  border: 2px solid var(--faq-border);
  background: var(--faq-bg);
  overflow: hidden;
  transition: border-color 0.2s;
}

.page-faq .faq-item:focus-within {
  border-color: var(--faq-primary);
}

/* 问题行 */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.2rem;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s;
  font-family: var(--faq-font-body);
  font-weight: 600;
  font-size: 1rem;
  color: var(--faq-text);
  background: var(--faq-question-bg);
  margin: 0;
  list-style: none;
}

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

.page-faq .faq-question:hover {
  background: var(--faq-question-hover-bg);
}

.page-faq .faq-question:focus {
  outline: 2px solid var(--faq-primary);
  outline-offset: -2px;
}

/* 展开状态 */
.page-faq .faq-item[aria-expanded="true"] .faq-question {
  background: var(--faq-question-active-bg);
  color: var(--color-bg);
}

.page-faq .faq-item[aria-expanded="true"] .faq-q-icon {
  background: var(--color-bg);
  color: var(--faq-primary);
}

.page-faq .faq-item[aria-expanded="true"] .faq-q-arrow::before {
  border-top-color: var(--color-bg);
  transform: rotate(180deg);
}

/* 问号图标 */
.page-faq .faq-q-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  background: var(--color-bg-dark);
  color: var(--faq-accent);
  font-family: var(--faq-font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
  border: 2px solid var(--faq-border);
  transition: background-color 0.2s, color 0.2s;
}

.page-faq .faq-q-text {
  flex: 1;
}

/* 展开箭头 */
.page-faq .faq-q-arrow {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s;
}

.page-faq .faq-q-arrow::before {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-left: 0.5rem solid transparent;
  border-right: 0.5rem solid transparent;
  border-top: 0.6rem solid var(--faq-text);
  transition: transform 0.3s, border-top-color 0.3s;
}

/* 答案 */
.page-faq .faq-answer {
  padding: 1rem 1.2rem;
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--faq-text);
  border-top: 1px solid var(--faq-border);
  background: var(--faq-bg);
}

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

.page-faq .faq-answer a {
  color: var(--faq-primary);
  text-decoration: underline;
  font-weight: 500;
}

.page-faq .faq-answer a:hover {
  color: var(--faq-secondary);
}

/* 章节链接 */
.page-faq .faq-section-link {
  margin-top: 1rem;
  text-align: right;
}

.page-faq .faq-section-link a {
  font-family: var(--faq-font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--faq-primary);
  text-decoration: none;
  transition: color 0.2s;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.page-faq .faq-section-link a:hover {
  color: var(--faq-secondary);
}

/* 响应式微调 */
@media (max-width: 1023px) {
  .page-faq .faq-sidebar {
    position: static;
    width: 100%;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-layout {
    padding: 0.5rem;
  }
  .page-faq .faq-section {
    padding: 1rem;
  }
  .page-faq .faq-question {
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }
  .page-faq .faq-answer {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
  .page-faq .faq-title {
    font-size: 2rem;
  }
  .page-faq .faq-section-heading {
    font-size: 1.5rem;
  }
}