/* ===== 页面专属：帮助中心 ===== */
.page-faq {
  --faq-icon-size: 28px;
  --faq-icon-bg: var(--color-secondary, #1E88E5);
  --faq-accent-line: var(--color-primary, #FF6B35);
  --faq-border-color: rgba(255, 255, 255, 0.08);
  --faq-radius: 10px;
  --faq-anim-duration: 0.35s;
  --faq-card-bg: var(--glass-bg, rgba(255, 255, 255, 0.05));
}

/* ----- 通用容器 ----- */
.page-faq .content-container {
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  width: 100%;
  box-sizing: border-box;
}

/* ----- 面包屑 ----- */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--small, 0.875rem);
  color: var(--color-secondary-light, #64B5F6);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}
.page-faq .breadcrumb a {
  color: var(--color-secondary-light, #64B5F6);
  text-decoration: none;
  transition: color var(--transition, 0.3s);
}
.page-faq .breadcrumb a:hover {
  color: var(--color-primary, #FF6B35);
}
.page-faq .breadcrumb-sep {
  color: var(--color-border, rgba(255,255,255,0.08));
  font-weight: 300;
}
.page-faq .breadcrumb [aria-current="page"] {
  color: var(--color-text, #FFFFFF);
  opacity: 0.8;
}

/* ----- 页面标题 ----- */
.page-faq .page-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--faq-border-color);
  position: relative;
}
.page-faq .page-header::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 72px;
  height: 2px;
  background: var(--faq-accent-line);
}
.page-faq .page-header h1 {
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: var(--h1, 2rem);
  color: var(--color-text, #FFFFFF);
  margin: 0 0 0.5rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.page-faq .page-desc {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--body, 1rem);
  color: var(--color-text, #FFFFFF);
  opacity: 0.7;
  margin: 0;
  max-width: 540px;
  line-height: 1.5;
}

/* ----- 筛选按钮栏 ----- */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2.5rem;
  padding: 0.25rem 0;
}
.page-faq .filter-btn {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--small, 0.875rem);
  font-weight: 600;
  padding: 0.5rem 1.125rem;
  border: 1.5px solid var(--faq-border-color);
  border-radius: 999px;
  background: var(--color-card, #3A3A3A);
  color: var(--color-text, #FFFFFF);
  cursor: pointer;
  transition: all var(--transition, 0.3s);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  line-height: 1.4;
}
.page-faq .filter-btn:hover {
  border-color: var(--color-primary-light, #FF8A65);
  background: rgba(255, 107, 53, 0.12);
  color: var(--color-primary-light, #FF8A65);
}
.page-faq .filter-btn.is-active {
  background: var(--color-primary, #FF6B35);
  border-color: var(--color-primary, #FF6B35);
  color: #fff;
  box-shadow: 0 0 20px rgba(255, 107, 53, 0.25);
}
.page-faq .filter-btn:focus-visible {
  outline: 2px solid var(--color-secondary, #1E88E5);
  outline-offset: 2px;
}

/* ----- FAQ 列表区域 ----- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

/* ----- 分类区块 ----- */
.page-faq .faq-category {
  position: relative;
}
.page-faq .category-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  position: relative;
  padding-left: 1rem;
  border-left: 3px solid var(--faq-accent-line);
}
.page-faq .category-num {
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: 0.875rem;
  color: var(--faq-accent-line);
  opacity: 0.5;
  letter-spacing: 0.04em;
  line-height: 1;
}
.page-faq .category-head h2 {
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: var(--h2, 1.5rem);
  color: var(--color-text, #FFFFFF);
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.page-faq .category-brief {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--body, 1rem);
  color: var(--color-text, #FFFFFF);
  opacity: 0.6;
  margin: 0 0 1.25rem 1rem;
  line-height: 1.5;
  max-width: 520px;
}

/* ----- 分类内容（手风琴 + 图片） ----- */
.page-faq .category-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.page-faq .faq-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1 1 100%;
}

/* ----- 手风琴项 ----- */
.page-faq .faq-item {
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-radius, 10px);
  background: var(--faq-card-bg);
  overflow: hidden;
  transition: border-color var(--transition, 0.3s);
}
.page-faq .faq-item[open] {
  border-color: rgba(255, 107, 53, 0.25);
  background: var(--color-card, #3A3A3A);
}
.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.125rem;
  cursor: pointer;
  list-style: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  transition: background var(--transition, 0.3s);
}
.page-faq .faq-item summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item summary:hover {
  background: rgba(255, 255, 255, 0.03);
}
.page-faq .faq-item[open] summary {
  background: rgba(255, 107, 53, 0.06);
  border-bottom: 1px solid var(--faq-border-color);
}
.page-faq .faq-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--faq-icon-size, 28px);
  height: var(--faq-icon-size, 28px);
  border-radius: 50%;
  background: var(--faq-icon-bg, #1E88E5);
  color: #fff;
  font-family: var(--font-heading, 'Montserrat Black', sans-serif);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1;
  transition: transform var(--faq-anim-duration);
}
.page-faq .faq-item[open] .faq-icon {
  background: var(--color-primary, #FF6B35);
  transform: scale(1.05);
}
.page-faq .faq-question {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--body, 1rem);
  font-weight: 600;
  color: var(--color-text, #FFFFFF);
  flex: 1 1 auto;
  line-height: 1.4;
}
.page-faq .faq-toggle {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--faq-anim-duration);
}
.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: '';
  position: absolute;
  background: var(--color-text, #FFFFFF);
  opacity: 0.6;
  transition: transform var(--faq-anim-duration);
  border-radius: 1px;
}
.page-faq .faq-toggle::before {
  width: 2px;
  height: 14px;
  top: 3px;
  left: 9px;
}
.page-faq .faq-toggle::after {
  width: 14px;
  height: 2px;
  top: 9px;
  left: 3px;
}
.page-faq .faq-item[open] .faq-toggle {
  transform: rotate(45deg);
}
.page-faq .faq-item[open] .faq-toggle::before {
  opacity: 0;
  transform: scaleY(0);
}

/* ----- 答案区域 ----- */
.page-faq .faq-answer {
  padding: 1.125rem 1.125rem 1.25rem;
  animation: faqFadeIn var(--faq-anim-duration) ease-out;
}
.page-faq .faq-answer p {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--body, 1rem);
  color: var(--color-text, #FFFFFF);
  opacity: 0.85;
  line-height: 1.7;
  margin: 0 0 0.75rem;
}
.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-answer a {
  color: var(--color-secondary-light, #64B5F6);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition, 0.3s);
}
.page-faq .faq-answer a:hover {
  color: var(--color-primary, #FF6B35);
}
.page-faq .answer-tip {
  font-size: var(--small, 0.875rem) !important;
  opacity: 0.6 !important;
  padding-left: 0.75rem;
  border-left: 2px solid var(--color-secondary, #1E88E5);
}
.page-faq .contact-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}
.page-faq .contact-list li {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--body, 1rem);
  color: var(--color-text, #FFFFFF);
  opacity: 0.85;
  line-height: 1.6;
}
.page-faq .contact-list a {
  color: var(--color-secondary-light, #64B5F6);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ----- 分类图片 ----- */
.page-faq .category-image {
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 0.5rem;
}
.page-faq .faq-illustration {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius, 12px);
  object-fit: contain;
  background: var(--color-card, #3A3A3A);
  box-shadow: var(--shadow, 0 4px 24px rgba(0,0,0,0.3));
}

/* ----- 联系卡片（其他问题底部） ----- */
.page-faq .contact-card {
  margin-top: 0.75rem;
  padding: 1.5rem 1.5rem 1.75rem;
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-radius, 10px);
  background: var(--faq-card-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.page-faq .contact-card-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}
.page-faq .contact-card-icon {
  font-size: 1.5rem;
  color: var(--color-primary, #FF6B35);
  line-height: 1;
}
.page-faq .contact-card-content p {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--body, 1rem);
  color: var(--color-text, #FFFFFF);
  opacity: 0.8;
  margin: 0;
  line-height: 1.5;
}
.page-faq .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: var(--small, 0.875rem);
  font-weight: 700;
  border: none;
  border-radius: 8px;
  background: var(--color-primary, #FF6B35);
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition, 0.3s);
  box-shadow: 0 0 0 rgba(255, 107, 53, 0);
}
.page-faq .btn-primary:hover {
  background: var(--color-primary-light, #FF8A65);
  box-shadow: 0 0 24px rgba(255, 107, 53, 0.35);
  transform: translateY(-1px);
}
.page-faq .btn-primary:focus-visible {
  outline: 2px solid var(--color-secondary, #1E88E5);
  outline-offset: 2px;
}

/* ----- 关键词高亮 ----- */
.page-faq .faq-answer strong {
  color: var(--color-primary-light, #FF8A65);
  font-weight: 700;
}

/* ----- 动画 ----- */
@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-faq .content-container {
    padding: 2rem 2rem 4rem;
  }
  .page-faq .page-header h1 {
    font-size: var(--h1, 2rem);
  }
  .page-faq .page-header::after {
    width: 96px;
  }
  .page-faq .filter-bar {
    gap: 0.75rem;
    margin-bottom: 3rem;
  }
  .page-faq .filter-btn {
    padding: 0.55rem 1.375rem;
    font-size: var(--body, 1rem);
  }

  /* 分类内容：手风琴与图片并排 */
  .page-faq .category-content {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
  }
  .page-faq .faq-items {
    flex: 1 1 60%;
    min-width: 280px;
  }
  .page-faq .category-image {
    flex: 0 0 35%;
    max-width: 320px;
    margin-top: 0;
    justify-content: flex-end;
    align-self: center;
  }
  .page-faq .faq-illustration {
    width: 100%;
    height: auto;
    max-height: 320px;
  }
  .page-faq .faq-illustration[width="500"] {
    max-height: 400px;
  }

  /* 联系卡片 */
  .page-faq .contact-card {
    padding: 1.75rem 2rem 2rem;
  }
  .page-faq .contact-card-content {
    flex-direction: row;
    align-items: center;
    gap: 1.25rem;
  }
  .page-faq .contact-card-content p {
    flex: 1;
  }
  .page-faq .contact-card-icon {
    font-size: 2rem;
  }

  /* 问答间距微调 */
  .page-faq .faq-item summary {
    padding: 1.125rem 1.375rem;
  }
  .page-faq .faq-answer {
    padding: 1.25rem 1.375rem 1.5rem;
  }
  .page-faq .category-head h2 {
    font-size: var(--h2, 1.5rem);
  }
}

@media (min-width: 1024px) {
  .page-faq .content-container {
    padding: 2.5rem 3rem 5rem;
  }
  .page-faq .faq-items {
    flex: 1 1 65%;
  }
  .page-faq .category-image {
    flex: 0 0 30%;
    max-width: 360px;
  }
  .page-faq .faq-illustration[width="500"] {
    max-height: 440px;
  }
  .page-faq .faq-list {
    gap: 3.5rem;
  }
}