/* ===== 页面专属样式：.page-faq (帮助中心) ===== */
.page-faq {
  --faq-sidebar-width: 260px;
  --faq-gap: var(--spacing-xl, 2.5rem);
  --faq-border-color: var(--color-secondary, #A8B2C1);
  --faq-active-color: var(--color-primary, #E63946);
  --faq-accent-color: var(--color-accent, #06D6A0);
  --faq-bg-panel: var(--color-bg-panel, #2B2D42);
  --faq-text-light: var(--color-text-light, #F1FAEE);
  --faq-text-muted: var(--color-text-muted, #A8B2C1);
  --faq-radius: var(--border-radius, 4px);
  --faq-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.4));
  --faq-font-heading: var(--font-heading, 'Bebas Neue', Impact, sans-serif);
  --faq-font-body: var(--font-body, 'Open Sans', sans-serif);
  --faq-font-mono: var(--font-mono, monospace);

  display: block;
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: var(--spacing-md, 1rem) var(--spacing-md, 1rem) var(--spacing-xl, 2.5rem);
  color: var(--faq-text-light);
  font-family: var(--faq-font-body);
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs, 0.25rem);
  font-size: 0.8rem;
  color: var(--faq-text-muted);
  margin-bottom: var(--spacing-md, 1rem);
  flex-wrap: wrap;
}
.page-faq .breadcrumb__item {
  color: var(--faq-text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .breadcrumb__item:hover {
  color: var(--faq-active-color);
}
.page-faq .breadcrumb__item--current {
  color: var(--faq-text-light);
  font-weight: 600;
}
.page-faq .breadcrumb__sep {
  color: var(--faq-text-muted);
  margin: 0 var(--spacing-xs, 0.25rem);
}

/* ===== Hero 区 ===== */
.page-faq .faq-hero {
  margin-bottom: var(--spacing-xl, 2.5rem);
  border-bottom: 1px solid var(--faq-border-color);
  padding-bottom: var(--spacing-lg, 1.5rem);
}
.page-faq .faq-hero__title {
  font-family: var(--faq-font-heading);
  font-size: var(--font-size-h1, 3rem);
  font-weight: 700;
  font-style: italic;
  letter-spacing: 2px;
  color: var(--faq-active-color);
  margin: 0 0 var(--spacing-xs, 0.25rem);
  line-height: 1.1;
  text-transform: uppercase;
}
.page-faq .faq-hero__subtitle {
  font-size: 1.05rem;
  color: var(--faq-text-muted);
  margin: 0 0 var(--spacing-md, 1rem);
  max-width: 640px;
  line-height: 1.5;
}

/* ===== 搜索框 ===== */
.page-faq .faq-search {
  position: relative;
  max-width: 480px;
}
.page-faq .faq-search__icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--faq-text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
}
.page-faq .faq-search__input {
  display: block;
  width: 100%;
  padding: 0.65rem 0.65rem 0.65rem 2.4rem;
  background: var(--faq-bg-panel);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-radius);
  color: var(--faq-text-light);
  font-family: var(--faq-font-body);
  font-size: 0.95rem;
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
  box-sizing: border-box;
}
.page-faq .faq-search__input::placeholder {
  color: var(--faq-text-muted);
  opacity: 0.7;
}
.page-faq .faq-search__input:focus {
  border-color: var(--faq-accent-color);
  box-shadow: 0 0 0 2px rgba(6, 214, 160, 0.2);
}

/* ===== 隐藏的 radio ===== */
.page-faq .faq-cat-radio {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* ===== 左右布局容器 ===== */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg, 1.5rem);
  position: relative;
}

/* ===== 左侧边栏（分类索引） ===== */
.page-faq .faq-sidebar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm, 0.5rem);
  background: var(--faq-bg-panel);
  padding: var(--spacing-md, 1rem);
  border-radius: var(--faq-radius);
  border: 1px solid var(--faq-border-color);
  position: relative;
  flex-shrink: 0;
}
.page-faq .faq-sidebar__label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm, 0.5rem);
  padding: 0.6rem 1rem;
  border-radius: var(--faq-radius);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--faq-text-muted);
  background: transparent;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  user-select: none;
  font-family: var(--faq-font-body);
  line-height: 1.3;
  white-space: nowrap;
}
.page-faq .faq-sidebar__label:hover {
  color: var(--faq-text-light);
  background: rgba(168, 178, 193, 0.08);
}
.page-faq .faq-sidebar__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  color: currentColor;
}

/* 选中态 */
#faq-cat-1:checked ~ .faq-layout .faq-sidebar__label[for="faq-cat-1"],
#faq-cat-2:checked ~ .faq-layout .faq-sidebar__label[for="faq-cat-2"],
#faq-cat-3:checked ~ .faq-layout .faq-sidebar__label[for="faq-cat-3"],
#faq-cat-4:checked ~ .faq-layout .faq-sidebar__label[for="faq-cat-4"] {
  color: var(--faq-active-color);
  background: rgba(230, 57, 70, 0.12);
  border-color: var(--faq-active-color);
}

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

/* 所有面板默认隐藏 */
.page-faq .faq-panel {
  display: none;
  animation: faq-fadeIn 0.35s ease;
}
@keyframes faq-fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* radio 切换显示对应面板 */
#faq-cat-1:checked ~ .faq-layout .faq-panel[data-cat="1"],
#faq-cat-2:checked ~ .faq-layout .faq-panel[data-cat="2"],
#faq-cat-3:checked ~ .faq-layout .faq-panel[data-cat="3"],
#faq-cat-4:checked ~ .faq-layout .faq-panel[data-cat="4"] {
  display: block;
}

/* ===== 面板头部 ===== */
.page-faq .faq-panel__heading {
  font-family: var(--faq-font-heading);
  font-size: var(--font-size-h2, 2.25rem);
  font-weight: 700;
  font-style: italic;
  letter-spacing: 1.5px;
  color: var(--faq-active-color);
  margin: 0 0 var(--spacing-xs, 0.25rem);
  line-height: 1.15;
  text-transform: uppercase;
}
.page-faq .faq-panel__desc {
  color: var(--faq-text-muted);
  font-size: 0.95rem;
  margin: 0 0 var(--spacing-lg, 1.5rem);
  line-height: 1.5;
}

/* ===== 图片封装 ===== */
.page-faq .faq-panel__image-wrap {
  margin: 0 0 var(--spacing-lg, 1.5rem);
  max-width: 500px;
  border-radius: var(--faq-radius);
  overflow: hidden;
  border: 1px solid var(--faq-border-color);
  background: var(--faq-bg-panel);
  box-shadow: var(--faq-shadow);
}
.page-faq .faq-panel__image-wrap--portrait {
  max-width: 320px;
}
.page-faq .faq-panel__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: attr(width) / attr(height);
}

/* ===== 折叠问答列表 ===== */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
}

/* 单个问答项 - 使用 details/summary */
.page-faq .faq-item {
  background: var(--faq-bg-panel);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color 0.25s;
}
.page-faq .faq-item[open] {
  border-color: rgba(6, 214, 160, 0.3);
}

.page-faq .faq-item__question {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm, 0.5rem);
  padding: 1rem 1.2rem;
  font-family: var(--faq-font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--faq-text-light);
  cursor: pointer;
  list-style: none;
  transition: background 0.2s, color 0.2s;
  user-select: none;
  line-height: 1.4;
}
.page-faq .faq-item__question::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__question::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--faq-border-color);
  color: var(--faq-bg-dark, #1A1A1A);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.3s, background 0.3s, color 0.3s;
}
.page-faq .faq-item[open] .faq-item__question::before {
  transform: rotate(45deg);
  background: var(--faq-accent-color);
  color: #fff;
}
.page-faq .faq-item__question:hover {
  background: rgba(168, 178, 193, 0.05);
}

.page-faq .faq-item__answer {
  padding: 0 1.2rem 1.2rem 1.2rem;
  color: var(--faq-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid transparent;
}
.page-faq .faq-item[open] .faq-item__answer {
  border-top-color: rgba(6, 214, 160, 0.15);
}
.page-faq .faq-item__answer p {
  margin: 0 0 0.6rem;
}
.page-faq .faq-item__answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item__answer a {
  color: var(--faq-accent-color);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.page-faq .faq-item__answer a:hover {
  color: var(--faq-active-color);
}

/* ===== 底部CTA ===== */
.page-faq .faq-cta {
  margin-top: var(--spacing-xl, 2.5rem);
  padding: var(--spacing-lg, 1.5rem) var(--spacing-md, 1rem);
  text-align: center;
  border-top: 1px solid var(--faq-border-color);
}
.page-faq .faq-cta__title {
  font-family: var(--faq-font-heading);
  font-size: var(--font-size-h3, 1.5rem);
  font-weight: 700;
  font-style: italic;
  letter-spacing: 1px;
  color: var(--faq-text-light);
  margin: 0 0 var(--spacing-xs, 0.25rem);
}
.page-faq .faq-cta__text {
  color: var(--faq-text-muted);
  margin: 0 0 var(--spacing-md, 1rem);
  font-size: 0.95rem;
}
.page-faq .faq-cta__btn {
  display: inline-block;
  padding: 0.7rem 2rem;
  background: var(--faq-active-color);
  color: #fff;
  border: none;
  border-radius: var(--faq-radius);
  font-family: var(--faq-font-body);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.25s, transform 0.2s, box-shadow 0.25s;
  box-shadow: 0 2px 12px rgba(230, 57, 70, 0.3);
}
.page-faq .faq-cta__btn:hover {
  background: var(--color-primary-hover, #ff4d5a);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(230, 57, 70, 0.4);
}

/* ===== 响应式：平板及以上 ===== */
@media (min-width: 640px) {
  .page-faq {
    padding: var(--spacing-md, 1rem) var(--spacing-lg, 1.5rem) var(--spacing-xl, 2.5rem);
  }
  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
  }
  .page-faq .faq-sidebar {
    flex-direction: column;
    width: var(--faq-sidebar-width);
    min-width: var(--faq-sidebar-width);
    padding: var(--spacing-md, 1rem);
    position: sticky;
    top: calc(var(--header-height, 4rem) + var(--spacing-md, 1rem));
    align-self: flex-start;
    gap: var(--spacing-xs, 0.25rem);
  }
  .page-faq .faq-sidebar__label {
    white-space: normal;
    padding: 0.7rem 1rem;
    font-size: 0.85rem;
  }
  .page-faq .faq-panel__image-wrap--portrait {
    max-width: 280px;
  }
}

/* ===== 响应式：桌面 1024px+ ===== */
@media (min-width: 1024px) {
  .page-faq {
    padding: var(--spacing-lg, 1.5rem) var(--spacing-xl, 2.5rem) var(--spacing-xl, 2.5rem);
  }
  .page-faq .faq-hero__title {
    font-size: var(--font-size-h1, 3rem);
  }
  .page-faq .faq-panel__heading {
    font-size: var(--font-size-h2, 2.25rem);
  }
  .page-faq .faq-sidebar {
    width: 280px;
    min-width: 280px;
    padding: var(--spacing-lg, 1.5rem);
  }
  .page-faq .faq-sidebar__label {
    font-size: 0.9rem;
    padding: 0.8rem 1.1rem;
  }
}

/* ===== 窄屏安全约束 ===== */
@media (max-width: 400px) {
  .page-faq {
    padding-left: var(--spacing-sm, 0.5rem);
    padding-right: var(--spacing-sm, 0.5rem);
  }
  .page-faq .faq-hero__title {
    font-size: 2rem;
  }
  .page-faq .faq-panel__heading {
    font-size: 1.5rem;
  }
  .page-faq .faq-item__question {
    font-size: 0.9rem;
    padding: 0.8rem 1rem;
  }
  .page-faq .faq-item__answer {
    padding: 0 1rem 1rem 1rem;
    font-size: 0.88rem;
  }
  .page-faq .faq-panel__image-wrap {
    max-width: 100%;
  }
  .page-faq .faq-panel__image-wrap--portrait {
    max-width: 100%;
  }
}

.page-faq {
  --faq-bg-dark: var(--faq-bg-panel);
}