/* 页面专属样式 - .page-faq */
.page-faq {
  --faq-bg: var(--gray);
  --faq-text: var(--white);
  --faq-accent: var(--red);
  --faq-gold: var(--gold);
  --faq-blue: var(--blue);
  background-color: var(--faq-bg);
  color: var(--faq-text);
  padding: 1rem 0;
}

.page-faq .breadcrumb {
  margin-bottom: 1rem;
}

.page-faq h1 {
  font-family: var(--font-title);
  font-size: 2.5rem;
  line-height: 1.2;
  color: var(--faq-accent);
  margin: 0 0 1.5rem;
  text-transform: uppercase;
}

/* 布局容器 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* 索引区域 */
.page-faq .faq-index {
  order: -1;
}

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

.page-faq .faq-index li a {
  display: block;
  padding: 0.5rem 1rem;
  background-color: var(--gray-light);
  color: var(--faq-text);
  text-decoration: none;
  font-weight: bold;
  font-family: var(--font-title);
  border-left: 3px solid var(--faq-gold);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.page-faq .faq-index li a:hover,
.page-faq .faq-index li a:focus {
  background-color: var(--faq-accent);
  border-left-color: var(--faq-blue);
}

/* 内容区域 */
.page-faq .faq-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* 类别标题 */
.page-faq .faq-category-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--gray-light);
  padding: 0.5rem 1rem;
  border-left: 6px solid var(--faq-accent);
  margin-bottom: 0.75rem;
}

.page-faq .faq-category-header img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  display: block;
}

.page-faq .faq-category-header h2 {
  margin: 0;
  font-family: var(--font-title);
  font-size: 1.3rem;
  color: var(--faq-text);
  text-transform: uppercase;
}

/* 流程图 */
.page-faq .faq-flowchart {
  width: 100%;
  max-width: 600px;
  height: auto;
  display: block;
  margin: 0 auto 1rem;
  border: 1px solid var(--faq-gold);
  border-radius: 4px;
  object-fit: cover;
}

/* 手风琴 (details) */
.page-faq details {
  background-color: var(--gray-light);
  border-radius: 4px;
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.page-faq details summary {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  cursor: pointer;
  background-color: var(--gray);
  color: var(--faq-accent);
  font-family: var(--font-title);
  font-size: 1rem;
  border-left: 4px solid var(--faq-accent);
  transition: background-color 0.3s ease, border-color 0.3s ease;
  list-style: none; /* 移除默认三角 */
  position: relative;
}

.page-faq details summary::-webkit-details-marker {
  display: none; /* 隐藏默认三角 */
}

.page-faq details summary::after {
  content: "+";
  position: absolute;
  right: 1rem;
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--faq-gold);
  transition: transform 0.3s ease;
}

.page-faq details[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}

.page-faq details[open] summary {
  border-left-color: var(--faq-blue);
  background-color: var(--gray);
}

.page-faq details summary:hover,
.page-faq details summary:focus {
  background-color: var(--faq-accent);
  color: var(--white);
  border-left-color: var(--faq-blue);
}

.page-faq details summary:hover::after,
.page-faq details summary:focus::after {
  color: var(--white);
}

/* 答案容器 */
.page-faq .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease, visibility 0.4s ease;
  padding: 0 1rem;
  visibility: hidden;
}

.page-faq details[open] .faq-answer {
  max-height: 500px;
  visibility: visible;
  padding: 1rem;
}

.page-faq .faq-answer p {
  margin: 0 0 0.5rem;
  color: var(--faq-text);
  line-height: 1.6;
}

.page-faq .faq-answer a {
  color: var(--faq-blue);
  text-decoration: underline;
  transition: color 0.3s ease;
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus {
  color: var(--faq-gold);
}

/* 响应式：桌面端侧边索引与内容并排 */
@media (min-width: 768px) {
  .page-faq {
    padding: 2rem 0;
  }

  .page-faq h1 {
    font-size: 3.5rem;
  }

  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-faq .faq-index {
    order: 0;
    position: sticky;
    top: 1rem;
    flex: 0 0 200px;
    max-width: 200px;
  }

  .page-faq .faq-index ul {
    flex-direction: column;
  }

  .page-faq .faq-index li a {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .page-faq .faq-content {
    flex: 1;
    min-width: 0;
  }

  .page-faq .faq-category-header h2 {
    font-size: 1.5rem;
  }
}

/* 更大屏幕可增加舒适度 */
@media (min-width: 1024px) {
  .page-faq h1 {
    font-size: 4rem;
  }

  .page-faq .faq-index {
    flex-basis: 240px;
    max-width: 240px;
  }
}