/* ============================================
   page-faq · 帮助中心专属样式
   作用域限定：.page-faq
   移动端优先 + 桌面媒体查询
   ============================================ */
.page-faq {
  --faq-bg: #F5F7FA;
  --faq-card-bg: #FFFFFF;
  --faq-text: #0B1D3A;
  --faq-text-secondary: #4A5568;
  --faq-accent: #FF6B35;
  --faq-accent-light: #FF8C5A;
  --faq-border: #E2E8F0;
  --faq-shadow: 0 2px 8px rgba(11,29,58,0.06);
  --faq-radius: 12px;
  --faq-gap: 1rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  color: var(--faq-text);
  background: var(--faq-bg);
  padding: 2rem 0 3rem;
}

/* ---- 面包屑 ---- */
.page-faq .breadcrumb {
  font-size: 0.875rem;
  color: var(--faq-text-secondary);
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}
.page-faq .breadcrumb a {
  color: var(--faq-text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .breadcrumb a:hover {
  color: var(--faq-accent);
}
.page-faq .breadcrumb .sep {
  color: var(--faq-border);
  user-select: none;
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--faq-text);
  font-weight: 500;
}

/* ---- 英雄区 ---- */
.page-faq .faq-hero {
  margin-bottom: 2rem;
}
.page-faq .faq-hero-title {
  font-family: var(--font-heading, 'Playfair Display', serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--faq-text);
  margin: 0 0 0.5rem;
  line-height: 1.2;
  position: relative;
}
.page-faq .faq-hero-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--faq-accent);
  margin-top: 0.4rem;
  border-radius: 2px;
}
.page-faq .faq-hero-desc {
  font-size: 1rem;
  color: var(--faq-text-secondary);
  line-height: 1.7;
  max-width: 680px;
  margin: 0.75rem 0 0;
}

/* ---- 搜索条 ---- */
.page-faq .faq-search {
  position: relative;
  margin-bottom: 2.5rem;
  max-width: 520px;
  display: flex;
  align-items: center;
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border);
  border-radius: 50px;
  padding: 0 1.25rem;
  box-shadow: var(--faq-shadow);
  transition: border-color 0.25s, box-shadow 0.25s;
}
.page-faq .faq-search:focus-within {
  border-color: var(--faq-accent);
  box-shadow: 0 0 0 3px rgba(255,107,53,0.15);
}
.page-faq .faq-search-icon {
  font-size: 1.1rem;
  line-height: 1;
  color: var(--faq-text-secondary);
  margin-right: 0.6rem;
  flex-shrink: 0;
}
.page-faq .faq-search-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 0.95rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  color: var(--faq-text);
  padding: 0.75rem 0;
  outline: none;
  min-width: 0;
}
.page-faq .faq-search-input::placeholder {
  color: var(--faq-text-secondary);
  opacity: 0.65;
}

/* ---- 章节 ---- */
.page-faq .faq-chapter {
  margin-bottom: 3rem;
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius);
  padding: 1.5rem 1.25rem;
  box-shadow: var(--faq-shadow);
}
.page-faq .faq-chapter-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  border-bottom: 2px solid var(--faq-bg);
  padding-bottom: 0.75rem;
}
.page-faq .section-number {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--faq-accent);
  line-height: 1;
  flex-shrink: 0;
}
.page-faq .faq-chapter-title {
  font-family: var(--font-heading, 'Playfair Display', serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--faq-text);
  margin: 0;
  line-height: 1.2;
}
.page-faq .faq-chapter-intro {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.page-faq .faq-chapter-img {
  width: 100%;
  height: auto;
  max-width: 600px;
  border-radius: 8px;
  object-fit: cover;
  background: var(--faq-bg);
  border: 1px solid var(--faq-border);
}
.page-faq .faq-chapter-desc {
  font-size: 0.95rem;
  color: var(--faq-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ---- 手风琴列表 ---- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

/* ---- 单个手风琴项 ---- */
.page-faq .faq-item {
  border: 1px solid var(--faq-border);
  border-radius: 10px;
  background: var(--faq-bg);
  overflow: hidden;
  transition: border-color 0.25s, box-shadow 0.25s;
}
/* 悬停高亮 */
.page-faq .faq-item:hover {
  border-color: var(--faq-accent-light);
  box-shadow: 0 2px 12px rgba(255,107,53,0.08);
}

/* ---- 问题（summary） ---- */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--faq-text);
  background: var(--faq-card-bg);
  transition: background 0.2s, color 0.2s;
  user-select: none;
}
.page-faq .faq-question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-question::marker {
  display: none;
  content: '';
}
/* 悬停高亮 */
.page-faq .faq-item:hover .faq-question {
  background: #FFF8F5;
  color: var(--faq-accent);
}

/* 问号图标 */
.page-faq .faq-q-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--faq-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
  line-height: 1;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
}
/* 问题文字 */
.page-faq .faq-q-text {
  flex: 1;
  line-height: 1.4;
}
/* 展开/收起箭头 */
.page-faq .faq-q-arrow {
  display: inline-block;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  position: relative;
  transition: transform 0.3s ease;
}
.page-faq .faq-q-arrow::before,
.page-faq .faq-q-arrow::after {
  content: '';
  position: absolute;
  background: var(--faq-text-secondary);
  border-radius: 1px;
  transition: background 0.2s;
}
.page-faq .faq-q-arrow::before {
  width: 2px;
  height: 10px;
  top: 4px;
  left: 8px;
  transform: rotate(0deg);
}
.page-faq .faq-q-arrow::after {
  width: 10px;
  height: 2px;
  top: 8px;
  left: 4px;
}
/* 展开时箭头旋转（通过 details[open] 控制） */
.page-faq .faq-item[open] .faq-q-arrow {
  transform: rotate(45deg);
}
.page-faq .faq-item[open] .faq-q-arrow::before,
.page-faq .faq-item[open] .faq-q-arrow::after {
  background: var(--faq-accent);
}

/* ---- 答案区域 ---- */
.page-faq .faq-answer {
  padding: 0 1.25rem 1rem;
  background: var(--faq-card-bg);
  border-top: 1px solid var(--faq-border);
  animation: faqFadeIn 0.3s ease;
}
.page-faq .faq-answer p {
  margin: 0.75rem 0 0;
  font-size: 0.925rem;
  line-height: 1.7;
  color: var(--faq-text-secondary);
}
.page-faq .faq-answer a {
  color: var(--faq-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.page-faq .faq-answer a:hover {
  color: var(--faq-accent-light);
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- 底部联系引导 ---- */
.page-faq .faq-cta {
  margin-top: 2.5rem;
  text-align: center;
  padding: 2rem 1.5rem;
  background: var(--faq-card-bg);
  border-radius: var(--faq-radius);
  box-shadow: var(--faq-shadow);
  border: 1px solid var(--faq-border);
}
.page-faq .faq-cta-text {
  font-size: 1.1rem;
  color: var(--faq-text);
  margin: 0 0 1rem;
  font-weight: 500;
}
.page-faq .faq-cta-btn {
  display: inline-block;
  padding: 0.7rem 2rem;
  background: var(--faq-accent);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 50px;
  text-decoration: none;
  transition: background 0.25s, transform 0.15s, box-shadow 0.25s;
  box-shadow: 0 4px 12px rgba(255,107,53,0.25);
}
.page-faq .faq-cta-btn:hover {
  background: var(--faq-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255,107,53,0.35);
}

/* ============================================
   桌面端媒体查询
   ============================================ */
@media (min-width: 720px) {
  .page-faq {
    padding: 2.5rem 0 4rem;
  }
  .page-faq .faq-hero-title {
    font-size: 2.8rem;
  }
  .page-faq .faq-hero-desc {
    font-size: 1.05rem;
  }
  .page-faq .faq-search {
    max-width: 560px;
  }
  .page-faq .faq-search-input {
    font-size: 1rem;
    padding: 0.85rem 0;
  }
  .page-faq .faq-chapter {
    padding: 2rem 2rem;
    margin-bottom: 2.5rem;
  }
  .page-faq .section-number {
    font-size: 2rem;
  }
  .page-faq .faq-chapter-title {
    font-size: 1.75rem;
  }
  .page-faq .faq-chapter-intro {
    flex-direction: row;
    align-items: flex-start;
    gap: 1.5rem;
  }
  .page-faq .faq-chapter-img {
    width: 280px;
    height: 186px;
    flex-shrink: 0;
  }
  .page-faq .faq-chapter-desc {
    font-size: 1rem;
    padding-top: 0.25rem;
  }
  .page-faq .faq-question {
    font-size: 1rem;
    padding: 1.1rem 1.5rem;
  }
  .page-faq .faq-answer {
    padding: 0 1.5rem 1.25rem;
  }
  .page-faq .faq-answer p {
    font-size: 0.95rem;
  }
  .page-faq .faq-cta {
    padding: 2.5rem 2rem;
  }
  .page-faq .faq-cta-text {
    font-size: 1.2rem;
  }
  .page-faq .faq-cta-btn {
    padding: 0.85rem 2.5rem;
    font-size: 1.05rem;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-chapter-img {
    width: 360px;
    height: 240px;
  }
  .page-faq .faq-chapter {
    padding: 2.5rem 2.5rem;
  }
  .page-faq .faq-list {
    gap: 0.75rem;
  }
}