/* ========== 帮助中心专属样式 (page-faq) ========== */
.page-faq {
  --faq-accent-bg: rgba(0, 230, 118, 0.08);
  --faq-border-color: rgba(224, 224, 224, 0.15);
  --faq-item-radius: 8px;
  --faq-sidebar-width: 220px;

  background:
    radial-gradient(circle at 20% 30%, rgba(26, 35, 126, 0.6) 0%, transparent 60%),
    radial-gradient(circle at 80% 70%, rgba(0, 230, 118, 0.04) 0%, transparent 40%),
    var(--color-surface);
  color: var(--color-on-surface);
  font-family: var(--font-body);
  min-height: calc(100vh - var(--header-height));
  padding: 0 0 4rem;
}

/* 页面标题区 */
.page-faq .faq-hero {
  padding: 3rem 0 1.5rem;
  border-bottom: 1px solid var(--faq-border-color);
}
.page-faq .faq-hero .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  margin-bottom: 1rem;
  color: rgba(224, 224, 224, 0.6);
}
.page-faq .faq-breadcrumb a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .faq-breadcrumb a:hover {
  color: var(--color-accent-secondary);
}
.page-faq .faq-breadcrumb-sep {
  color: rgba(255, 255, 255, 0.3);
}
.page-faq .faq-hero-title {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--color-on-primary);
  margin: 0 0 0.5rem;
}
.page-faq .faq-hero-desc {
  font-size: 1.05rem;
  line-height: 1.6;
  color: rgba(224, 224, 224, 0.8);
  max-width: 600px;
}

/* 布局：侧栏 + 主内容 */
.page-faq .faq-layout {
  display: flex;
  gap: 2.5rem;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2rem 1.5rem 0;
  align-items: flex-start;
}

/* 左侧边栏 */
.page-faq .faq-sidebar {
  width: var(--faq-sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-height) + 1.5rem);
}
.page-faq .faq-sidebar-inner {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 1.5rem 1rem;
}
.page-faq .faq-sidebar-heading {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.page-faq .faq-sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.page-faq .faq-sidebar-link {
  display: block;
  padding: 0.5rem 0.75rem;
  color: var(--color-on-surface);
  text-decoration: none;
  font-size: 0.9rem;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s;
  border-left: 3px solid transparent;
}
.page-faq .faq-sidebar-link:hover {
  background: var(--faq-accent-bg);
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}
.page-faq .faq-sidebar-meta {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--faq-border-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: rgba(224, 224, 224, 0.5);
}
.page-faq .faq-sidebar-meta-icon {
  color: var(--color-accent-secondary);
}

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

/* 搜索框 */
.page-faq .faq-search {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  max-width: 500px;
}
.page-faq .faq-search-input {
  flex: 1;
  padding: 0.7rem 1rem;
  border: 1px solid var(--faq-border-color);
  border-radius: 8px;
  background: rgba(13, 27, 42, 0.8);
  color: var(--color-on-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.page-faq .faq-search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.15);
}
.page-faq .faq-search-input::placeholder {
  color: rgba(224, 224, 224, 0.4);
}
.page-faq .faq-search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: var(--color-on-accent);
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1.2rem;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.page-faq .faq-search-btn:hover {
  background: #00c853;
}

/* 问答区块 */
.page-faq .faq-section {
  margin-bottom: 3rem;
}
.page-faq .faq-section-title {
  font-family: var(--font-headline);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-accent);
  margin: 0 0 1.2rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--faq-border-color);
}

/* 单个问答项 */
.page-faq .faq-item {
  background: rgba(13, 27, 42, 0.5);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-item-radius);
  margin-bottom: 0.75rem;
  overflow: hidden;
  transition: border-color 0.3s;
}
.page-faq .faq-item:focus-within,
.page-faq .faq-item:hover {
  border-color: rgba(0, 230, 118, 0.3);
}

/* 问题按钮 */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  color: var(--color-on-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.page-faq .faq-question:hover {
  background: var(--faq-accent-bg);
}
.page-faq .faq-q-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-on-accent);
  font-family: var(--font-headline);
  font-weight: 900;
  font-size: 0.85rem;
  flex-shrink: 0;
}
.page-faq .faq-q-text {
  flex: 1;
  line-height: 1.4;
}
.page-faq .faq-q-toggle {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: transform 0.3s;
  flex-shrink: 0;
}

/* 展开状态 */
.page-faq .faq-item[data-expanded] .faq-q-toggle {
  transform: rotate(45deg);
}
.page-faq .faq-item[data-expanded] .faq-question {
  border-bottom: 1px solid var(--faq-border-color);
}

/* 答案区域 */
.page-faq .faq-answer {
  padding: 0.75rem 1.25rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(224, 224, 224, 0.85);
  animation: faqFadeIn 0.3s ease-out;
}
.page-faq .faq-answer p {
  margin: 0 0 0.7rem;
}
.page-faq .faq-answer p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-note {
  font-size: 0.85rem;
  color: rgba(255, 215, 0, 0.7);
  border-left: 3px solid var(--color-accent-secondary);
  padding-left: 0.75rem;
  margin-top: 0.5rem;
}
.page-faq .faq-answer a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.page-faq .faq-answer a:hover {
  color: var(--color-accent-secondary);
}
.page-faq .faq-answer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.7rem;
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--color-accent);
}
.page-faq .faq-answer-link:hover {
  text-decoration: underline;
}

/* 图片 */
.page-faq .faq-answer-figure {
  margin: 1rem 0;
}
.page-faq .faq-step-img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--faq-border-color);
  object-fit: cover;
}
.page-faq .faq-fig-caption {
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: rgba(224, 224, 224, 0.5);
  font-style: italic;
}

/* 无结果提示 */
.page-faq .faq-noresult {
  text-align: center;
  padding: 2rem;
  color: rgba(224, 224, 224, 0.6);
  font-style: italic;
}

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

/* 通用按钮 (btn-ghost 已存在全局，此处微调) */
.page-faq .btn-ghost {
  background: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: 0.45rem 1rem;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.page-faq .btn-ghost:hover {
  background: var(--color-accent);
  color: var(--color-on-accent);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .page-faq {
    padding: 0 0 3rem;
  }
  .page-faq .faq-hero {
    padding: 1.5rem 0 1rem;
  }
  .page-faq .faq-hero .container,
  .page-faq .faq-layout {
    padding-left: 1rem;
    padding-right: 1rem;
  }
  .page-faq .faq-layout {
    flex-direction: column;
    gap: 1.5rem;
  }
  .page-faq .faq-sidebar {
    width: 100%;
    position: static;
  }
  .page-faq .faq-sidebar-inner {
    padding: 1rem;
  }
  .page-faq .faq-sidebar-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.4rem;
  }
  .page-faq .faq-sidebar-link {
    padding: 0.4rem 0.6rem;
    font-size: 0.8rem;
    border-left: none;
    border-bottom: 2px solid transparent;
  }
  .page-faq .faq-sidebar-link:hover {
    border-bottom-color: var(--color-accent);
    border-left-color: transparent;
  }
  .page-faq .faq-search {
    max-width: 100%;
  }
  .page-faq .faq-section-title {
    font-size: 1.3rem;
  }
  .page-faq .faq-question {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
  .page-faq .faq-answer {
    padding: 0.6rem 1rem 1rem;
  }
  .page-faq .faq-step-img {
    width: 100%;
    height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-answer {
    animation: none;
  }
  .page-faq .faq-q-toggle {
    transition: none;
  }
  .page-faq .faq-search-input,
  .page-faq .faq-search-btn,
  .page-faq .faq-sidebar-link,
  .page-faq .faq-question {
    transition: none;
  }
}