/* 帮助中心专用样式 */
.help-layout {
  display: grid;
  grid-template-columns: 260px 1fr 240px;
  gap: 48px;
  max-width: 1600px;
  margin: 0 auto;
  padding: 48px 24px;
}

.help-sidebar-left {
  position: sticky;
  top: 100px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.help-nav-group {
  margin-bottom: 32px;
}

.help-nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-gray-200);
}

.help-nav-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.help-nav-item a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-gray-600);
  border-radius: 8px;
  transition: all 150ms ease;
}

.help-nav-item a:hover,
.help-nav-item a.active {
  background-color: var(--color-primary-lighter);
  color: var(--color-primary);
}

.help-content {
  min-width: 0;
}

.help-article {
  max-width: 800px;
}

.help-article h1 {
  font-size: 36px;
  margin-bottom: 24px;
}

.help-article-meta {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-gray-200);
}

.help-article-meta span {
  font-size: 14px;
  color: var(--color-gray-500);
}

.help-article-body {
  line-height: 1.8;
}

.help-article-body h2 {
  font-size: 24px;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-gray-200);
}

.help-article-body h3 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 12px;
}

.help-article-body p {
  margin-bottom: 16px;
  color: var(--color-gray-700);
}

.help-article-body ul,
.help-article-body ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.help-article-body li {
  margin-bottom: 8px;
}

.help-article-body img {
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  margin: 24px 0;
}

.help-article-body code {
  background-color: var(--color-gray-100);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Monaco', 'Consolas', monospace;
  font-size: 14px;
  color: var(--color-primary-dark);
}

.help-article-body pre {
  background-color: var(--color-gray-900);
  color: var(--color-gray-100);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 24px 0;
}

.help-article-body pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
}

.help-sidebar-right {
  position: sticky;
  top: 100px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.toc-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: 16px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toc-item a {
  display: block;
  font-size: 13px;
  color: var(--color-gray-600);
  padding-left: 12px;
  border-left: 2px solid var(--color-gray-200);
  transition: all 150ms ease;
  line-height: 1.5;
}

.toc-item a:hover,
.toc-item a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

.toc-item.toc-level-3 a {
  padding-left: 24px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  font-size: 14px;
}

.breadcrumb-item {
  color: var(--color-gray-500);
}

.breadcrumb-item a {
  color: var(--color-gray-500);
}

.breadcrumb-item a:hover {
  color: var(--color-primary);
}

.breadcrumb-item::after {
  content: '/';
  margin-left: 8px;
  color: var(--color-gray-400);
}

.breadcrumb-item:last-child::after {
  display: none;
}

.breadcrumb-item:last-child {
  color: var(--color-gray-800);
}

/* 帮助中心首页 */
.help-hero {
  padding: 80px 24px;
  background: linear-gradient(180deg, var(--color-primary-lighter) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.help-hero h1 {
  font-size: 42px;
  margin-bottom: 16px;
}

.help-hero p {
  font-size: 18px;
  color: var(--color-gray-600);
  margin-bottom: 32px;
}

.help-search {
  max-width: 600px;
  margin: 0 auto;
}

.help-search input {
  width: 100%;
  padding: 16px 24px;
  font-size: 16px;
  border: 2px solid var(--color-gray-300);
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  transition: all 150ms ease;
}

.help-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-xl);
}

.help-categories {
  padding: 60px 24px;
}

.help-categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.help-category-card {
  background: var(--bg-primary);
  border: 1px solid var(--color-gray-200);
  border-radius: 16px;
  padding: 32px;
  transition: all 200ms ease;
  cursor: pointer;
}

.help-category-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.help-category-icon {
  width: 64px;
  height: 64px;
  background: var(--color-primary-gradient);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.help-category-icon svg {
  width: 32px;
  height: 32px;
  color: white;
}

.help-category-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.help-category-card p {
  font-size: 14px;
  color: var(--color-gray-600);
  margin-bottom: 16px;
}

.help-category-link {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* 响应式 */
@media (max-width: 1200px) {
  .help-layout {
    grid-template-columns: 240px 1fr;
  }
  
  .help-sidebar-right {
    display: none;
  }
}

@media (max-width: 768px) {
  .help-layout {
    grid-template-columns: 1fr;
    padding: 24px 16px;
  }
  
  .help-sidebar-left {
    display: none;
  }
  
  .help-article h1 {
    font-size: 28px;
  }
  
  .help-categories-grid {
    grid-template-columns: 1fr;
  }
}