/* ==========================================================================
   components.css — 组件样式
   包含：Banner轮播、教程卡片、文章列表、代码块、提示框、
         侧栏组件、标签云、在线工具、广告位、分页等
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Banner 轮播图
   -------------------------------------------------------------------------- */
.banner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-dark);
  aspect-ratio: 16 / 5;
  min-height: 180px;
}

.banner__track {
  display: flex;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.banner__slide {
  min-width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  align-items: center;
  padding: var(--space-xl) var(--space-2xl);
}

/* 幻灯片渐变背景 */
.banner__slide:nth-child(1) {
  background: linear-gradient(135deg, #1a3a2a 0%, #2d6a4f 50%, #1b4332 100%);
}
.banner__slide:nth-child(2) {
  background: linear-gradient(135deg, #1a2a4a 0%, #2d4a8f 50%, #1b2b5a 100%);
}
.banner__slide:nth-child(3) {
  background: linear-gradient(135deg, #3a1a2a 0%, #7b2d8f 50%, #4a1b3a 100%);
}

.banner__content {
  position: relative;
  z-index: 1;
  max-width: 500px;
}

.banner__tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-xs);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
  backdrop-filter: blur(4px);
}

.banner__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.banner__desc {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: var(--space-lg);
  line-height: var(--line-height-normal);
}

.banner__actions {
  display: flex;
  gap: var(--space-sm);
}

.banner__btn {
  padding: 9px 22px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  border: 2px solid transparent;
}
.banner__btn--primary {
  background: var(--primary);
  color: #fff;
}
.banner__btn--primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}
.banner__btn--ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: rgba(255, 255, 255, 0.9);
  background: transparent;
}
.banner__btn--ghost:hover {
  border-color: #fff;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

/* 装饰图形（右侧） */
.banner__deco {
  position: absolute;
  right: var(--space-2xl);
  top: 50%;
  transform: translateY(-50%);
  font-size: 110px;
  opacity: 0.18;
  user-select: none;
  pointer-events: none;
  filter: drop-shadow(0 0 20px rgba(255,255,255,0.2));
}

/* 左右箭头 */
.banner__arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  border: none;
  font-size: 18px;
  transition: background var(--transition-fast);
  backdrop-filter: blur(4px);
}
.banner__arrow:hover {
  background: rgba(255, 255, 255, 0.3);
}
.banner__arrow--prev { left: var(--space-md); }
.banner__arrow--next { right: var(--space-md); }

/* 底部圆点 */
.banner__dots {
  position: absolute;
  bottom: var(--space-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-xs);
  z-index: 10;
}
.banner__dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}
.banner__dot.active {
  background: #fff;
  width: 24px;
}

/* --------------------------------------------------------------------------
   2. 快捷入口图标栏
   -------------------------------------------------------------------------- */
.quick-entry {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.quick-entry__grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: var(--space-xs);
}

.quick-entry__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: var(--space-sm) var(--space-xs);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.quick-entry__item:hover {
  background: var(--bg-page);
  transform: translateY(-2px);
}

.quick-entry__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.quick-entry__label {
  font-size: var(--font-size-xs);
  color: var(--text-sub);
  text-align: center;
  white-space: nowrap;
}

/* 快捷入口图标颜色 */
.icon-bg-1 { background: #FFF3E0; }
.icon-bg-2 { background: #E3F2FD; }
.icon-bg-3 { background: #E8F5E9; }
.icon-bg-4 { background: #FCE4EC; }
.icon-bg-5 { background: #F3E5F5; }
.icon-bg-6 { background: #E0F7FA; }
.icon-bg-7 { background: #FFF8E1; }
.icon-bg-8 { background: #EFEBE9; }

/* --------------------------------------------------------------------------
   3. 区块标题（section-header）
   -------------------------------------------------------------------------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-main);
  position: relative;
  padding-left: 12px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 1.1em;
  background: var(--primary);
  border-radius: var(--radius-sm);
}

.section-more {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.section-more:hover {
  color: var(--primary);
}

/* --------------------------------------------------------------------------
   4. 教程卡片
   -------------------------------------------------------------------------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.tutorial-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  text-decoration: none;
  color: inherit;
}
.tutorial-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
  border-color: transparent;
}

/* 顶部彩色条 */
.tutorial-card__top {
  height: 4px;
}
.card-color-1 { background: linear-gradient(90deg, #FF5722, #FF8A65); }
.card-color-2 { background: linear-gradient(90deg, #2196F3, #64B5F6); }
.card-color-3 { background: linear-gradient(90deg, #4CAF50, #81C784); }
.card-color-4 { background: linear-gradient(90deg, #9C27B0, #CE93D8); }
.card-color-5 { background: linear-gradient(90deg, #FF9800, #FFB74D); }
.card-color-6 { background: linear-gradient(90deg, #009688, #4DB6AC); }
.card-color-7 { background: linear-gradient(90deg, #E91E63, #F48FB1); }
.card-color-8 { background: linear-gradient(90deg, #607D8B, #90A4AE); }

.tutorial-card__body {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tutorial-card__icon {
  font-size: 36px;
  margin-bottom: var(--space-sm);
  line-height: 1;
}

.tutorial-card__name {
  font-size: var(--font-size-md);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: var(--space-xs);
}

.tutorial-card__desc {
  font-size: var(--font-size-xs);
  color: var(--text-sub);
  line-height: var(--line-height-normal);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.tutorial-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-md);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--border-color);
}

.tutorial-card__count {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

.tutorial-card__btn {
  font-size: var(--font-size-xs);
  color: var(--primary);
  font-weight: 500;
  padding: 3px 10px;
  border: 1px solid var(--primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}
.tutorial-card:hover .tutorial-card__btn {
  background: var(--primary);
  color: #fff;
}

/* --------------------------------------------------------------------------
   5. 文章列表行
   -------------------------------------------------------------------------- */
.article-list {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 13px var(--space-md);
  border-bottom: 1px solid var(--border-color);
  transition: background var(--transition-fast), padding-left var(--transition-fast);
  text-decoration: none;
  color: inherit;
}
.article-list__item:last-child {
  border-bottom: none;
}
.article-list__item:hover {
  background: var(--primary-light);
  padding-left: 20px;
}

.article-list__tag {
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
  color: #fff;
}

.tag-frontend  { background: #FF5722; }
.tag-backend   { background: #2196F3; }
.tag-cloud     { background: #009688; }
.tag-ai        { background: #9C27B0; }
.tag-database  { background: #FF9800; }
.tag-tool      { background: #607D8B; }

.article-list__title {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--text-main);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.article-list__item:hover .article-list__title {
  color: var(--primary);
}

.article-list__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-shrink: 0;
  font-size: var(--font-size-xs);
  color: var(--text-light);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   6. 专题卡片（横向滚动）
   -------------------------------------------------------------------------- */
.topic-scroll {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  padding-bottom: var(--space-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}
.topic-scroll::-webkit-scrollbar {
  height: 4px;
}
.topic-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.topic-scroll::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}

.topic-card {
  min-width: 160px;
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  flex-shrink: 0;
}
.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.topic-card__cover {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
}
.topic-card__cover-1 { background: linear-gradient(135deg, #E3F2FD, #BBDEFB); }
.topic-card__cover-2 { background: linear-gradient(135deg, #E8F5E9, #C8E6C9); }
.topic-card__cover-3 { background: linear-gradient(135deg, #FCE4EC, #F8BBD0); }
.topic-card__cover-4 { background: linear-gradient(135deg, #FFF3E0, #FFE0B2); }
.topic-card__cover-5 { background: linear-gradient(135deg, #F3E5F5, #E1BEE7); }
.topic-card__cover-6 { background: linear-gradient(135deg, #E0F7FA, #B2EBF2); }

.topic-card__info {
  padding: var(--space-sm);
}
.topic-card__name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}
.topic-card__count {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

/* --------------------------------------------------------------------------
   7. 广告位
   -------------------------------------------------------------------------- */
.ad-block {
  background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ad-block::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}
.ad-block__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}
.ad-block__desc {
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-md);
}
.ad-block__btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  background: #fff;
  color: var(--primary-dark);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
}
.ad-block__btn:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

/* 侧栏小广告 */
.ad-block--small {
  padding: var(--space-md);
  border-radius: var(--radius-md);
}
.ad-block--small .ad-block__title {
  font-size: var(--font-size-md);
}

/* --------------------------------------------------------------------------
   8. 侧栏：教程分类列表
   -------------------------------------------------------------------------- */
.category-list {
  list-style: none;
}
.category-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 7px var(--space-xs);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
  text-decoration: none;
  color: inherit;
}
.category-list__item:hover {
  background: var(--bg-page);
}
.category-list__name {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--text-sub);
}
.category-list__item:hover .category-list__name {
  color: var(--primary);
}
.category-list__count {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

/* --------------------------------------------------------------------------
   9. 侧栏：在线工具快捷入口
   -------------------------------------------------------------------------- */
.tool-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs);
}
.tool-grid__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-sm) var(--space-xs);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  color: inherit;
}
.tool-grid__item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-dark);
}
.tool-grid__icon {
  font-size: 20px;
}
.tool-grid__label {
  font-size: var(--font-size-xs);
  color: var(--text-sub);
  text-align: center;
}
.tool-grid__item:hover .tool-grid__label {
  color: var(--primary-dark);
}

/* --------------------------------------------------------------------------
   10. 侧栏：热门排行
   -------------------------------------------------------------------------- */
.rank-list {
  list-style: none;
}
.rank-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 7px 0;
  border-bottom: 1px dashed var(--border-color);
  text-decoration: none;
  color: inherit;
}
.rank-list__item:last-child {
  border-bottom: none;
}
.rank-list__item:hover .rank-list__title {
  color: var(--primary);
}

.rank-list__num {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-sm);
  background: var(--border-color);
  color: var(--text-light);
  font-size: var(--font-size-xs);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
/* 前三名彩色 */
.rank-list__item:nth-child(1) .rank-list__num { background: #FFD700; color: #7d5c00; }
.rank-list__item:nth-child(2) .rank-list__num { background: #C0C0C0; color: #555; }
.rank-list__item:nth-child(3) .rank-list__num { background: #CD7F32; color: #fff; }

.rank-list__title {
  flex: 1;
  font-size: var(--font-size-xs);
  color: var(--text-sub);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  transition: color var(--transition-fast);
}
.rank-list__views {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   11. 右侧栏：推荐教程小卡片
   -------------------------------------------------------------------------- */
.rec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.rec-list__item {
  display: flex;
  gap: var(--space-sm);
  text-decoration: none;
  color: inherit;
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--border-color);
}
.rec-list__item:last-child {
  border-bottom: none;
}
.rec-list__item:hover .rec-list__title {
  color: var(--primary);
}

.rec-list__thumb {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.rec-list__info {
  flex: 1;
  min-width: 0;
}
.rec-list__title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 3px;
  transition: color var(--transition-fast);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.rec-list__desc {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   12. 右侧栏：标签云
   -------------------------------------------------------------------------- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}
.tag-cloud__item {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  color: var(--text-sub);
  text-decoration: none;
  transition: all var(--transition-fast);
  line-height: 1.6;
}
.tag-cloud__item:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
/* 不同大小的标签 */
.tag-cloud__item--sm  { font-size: 11px; }
.tag-cloud__item--md  { font-size: var(--font-size-xs); }
.tag-cloud__item--lg  { font-size: var(--font-size-sm); }

/* --------------------------------------------------------------------------
   13. 右侧栏：固定目录 TOC
   -------------------------------------------------------------------------- */
.toc-widget {
  position: sticky;
  top: 62px; /* 吸顶导航高度 */
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}
.toc-widget::-webkit-scrollbar {
  width: 3px;
}
.toc-widget::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-full);
}

.toc-list {
  list-style: none;
}
.toc-list__item {
  border-left: 2px solid var(--border-color);
  transition: border-color var(--transition-fast);
}
.toc-list__item.active {
  border-color: var(--primary);
}

.toc-list__link {
  display: block;
  padding: 5px var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--text-sub);
  text-decoration: none;
  transition: color var(--transition-fast);
  line-height: var(--line-height-tight);
}
.toc-list__link:hover,
.toc-list__item.active .toc-list__link {
  color: var(--primary);
}
/* h3 缩进 */
.toc-list__item--h3 {
  padding-left: var(--space-md);
}

/* --------------------------------------------------------------------------
   14. 代码块
   -------------------------------------------------------------------------- */
.code-block {
  position: relative;
  margin: var(--space-md) 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #1e1e2e;
  border: 1px solid #2d2d3f;
}

.code-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px var(--space-md);
  background: #16162a;
  border-bottom: 1px solid #2d2d3f;
}

.code-block__lang {
  font-size: var(--font-size-xs);
  color: #7c7c99;
  font-family: var(--font-code);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* 三个圆点装饰 */
.code-block__dots {
  display: flex;
  gap: 5px;
}
.code-block__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.code-block__dot:nth-child(1) { background: #FF5F57; }
.code-block__dot:nth-child(2) { background: #FFBD2E; }
.code-block__dot:nth-child(3) { background: #28C840; }

.code-block__copy {
  font-size: var(--font-size-xs);
  color: #7c7c99;
  cursor: pointer;
  background: none;
  border: 1px solid #3d3d55;
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
}
.code-block__copy:hover {
  color: var(--primary);
  border-color: var(--primary);
}
.code-block__copy.copied {
  color: var(--color-success);
  border-color: var(--color-success);
}

.code-block__body {
  overflow-x: auto;
  padding: var(--space-md);
}
.code-block__body::-webkit-scrollbar {
  height: 4px;
}
.code-block__body::-webkit-scrollbar-thumb {
  background: #3d3d55;
  border-radius: var(--radius-full);
}

.code-block pre {
  margin: 0;
  font-family: var(--font-code);
  font-size: 13.5px;
  line-height: 1.7;
  color: #cdd6f4;
  white-space: pre;
  tab-size: 2;
}

/* 行号 */
.code-block__line-nums {
  display: inline-block;
  user-select: none;
  color: #45475a;
  margin-right: var(--space-md);
  text-align: right;
  min-width: 2ch;
}

/* 简单语法色 */
.token-keyword  { color: #cba6f7; }
.token-string   { color: #a6e3a1; }
.token-comment  { color: #6c7086; font-style: italic; }
.token-number   { color: #fab387; }
.token-function { color: #89dceb; }
.token-operator { color: #89dceb; }
.token-punctuation { color: #cdd6f4; }

/* --------------------------------------------------------------------------
   15. 文章正文内容区
   -------------------------------------------------------------------------- */
.article-content {
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--text-main);
}

.article-content h2 {
  font-size: 20px;
  font-weight: 700;
  margin: var(--space-xl) 0 var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--border-color);
  color: var(--text-main);
  scroll-margin-top: 70px;
}
.article-content h2::before {
  content: '# ';
  color: var(--primary);
  font-weight: 400;
}

.article-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin: var(--space-lg) 0 var(--space-sm);
  color: var(--text-main);
  scroll-margin-top: 70px;
}
.article-content h3::before {
  content: '## ';
  color: var(--secondary);
  font-weight: 400;
  font-size: 14px;
}

.article-content p {
  margin-bottom: var(--space-md);
}

.article-content ul,
.article-content ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  margin-bottom: var(--space-xs);
  line-height: var(--line-height-normal);
}

.article-content a {
  color: var(--secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--secondary-dark);
}

.article-content strong { font-weight: 700; }
.article-content em     { font-style: italic; }

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-md) 0;
  font-size: var(--font-size-sm);
  overflow-x: auto;
  display: block;
}
.article-content th,
.article-content td {
  padding: 10px var(--space-md);
  border: 1px solid var(--border-color);
  text-align: left;
}
.article-content th {
  background: var(--bg-page);
  font-weight: 600;
  color: var(--text-main);
}
.article-content tr:nth-child(even) td {
  background: #fafafa;
}
.article-content tr:hover td {
  background: var(--primary-light);
}

.article-content img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: var(--space-md) auto;
  box-shadow: var(--shadow);
}

/* --------------------------------------------------------------------------
   16. 文章头部信息区
   -------------------------------------------------------------------------- */
.article-header {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}

.article-header__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: var(--space-md);
  line-height: var(--line-height-tight);
}

.article-header__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--font-size-xs);
  color: var(--text-light);
}

.article-header__author {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  color: var(--text-sub);
}

.article-header__avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.article-header__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-sm);
}

/* --------------------------------------------------------------------------
   17. 上一篇 / 下一篇
   -------------------------------------------------------------------------- */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.article-nav__item {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.article-nav__item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.article-nav__label {
  font-size: var(--font-size-xs);
  color: var(--text-light);
}
.article-nav__item--next .article-nav__label {
  text-align: right;
}

.article-nav__title {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-main);
  transition: color var(--transition-fast);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.article-nav__item--next .article-nav__title {
  text-align: right;
}
.article-nav__item:hover .article-nav__title {
  color: var(--primary-dark);
}

/* --------------------------------------------------------------------------
   18. 评论区
   -------------------------------------------------------------------------- */
.comment-section {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-top: var(--space-md);
}

.comment-section__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-lg);
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.comment-section__count {
  font-size: var(--font-size-sm);
  color: var(--text-light);
  font-weight: 400;
}

.comment-input-wrap {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.comment-input-wrap textarea {
  flex: 1;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  color: var(--text-main);
  resize: vertical;
  min-height: 80px;
  transition: border-color var(--transition-fast);
  background: var(--bg-white);
}
.comment-input-wrap textarea:focus {
  border-color: var(--primary);
  outline: none;
}

.comment-list {
  list-style: none;
}
.comment-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border-color);
}
.comment-item:last-child {
  border-bottom: none;
}
.comment-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.comment-body { flex: 1; }
.comment-user {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}
.comment-time {
  font-size: var(--font-size-xs);
  color: var(--text-light);
  margin-left: var(--space-sm);
  font-weight: 400;
}
.comment-text {
  font-size: var(--font-size-sm);
  color: var(--text-sub);
  line-height: var(--line-height-normal);
}

/* --------------------------------------------------------------------------
   19. 分页组件
   -------------------------------------------------------------------------- */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xs);
  margin: var(--space-lg) 0;
}

.page-btn {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-white);
  color: var(--text-sub);
  font-size: var(--font-size-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  text-decoration: none;
}
.page-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
}
.page-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}
.page-btn--wide {
  width: auto;
  padding: 0 var(--space-sm);
}

/* --------------------------------------------------------------------------
   20. 收藏夹面板
   -------------------------------------------------------------------------- */
.favorites-panel {
  position: fixed;
  top: 0;
  right: -360px;
  width: 360px;
  height: 100vh;
  background: var(--bg-white);
  box-shadow: -4px 0 20px rgba(0,0,0,0.1);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: right 0.3s ease;
}
.favorites-panel.open {
  right: 0;
}

.favorites-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-color);
}
.favorites-panel__tabs {
  display: flex;
  gap: var(--space-sm);
}
.fav-tab {
  padding: var(--space-xs) var(--space-md);
  border: none;
  background: transparent;
  color: var(--text-sub);
  font-size: var(--font-size-sm);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.fav-tab.active {
  background: var(--primary);
  color: #fff;
}
.favorites-panel__close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 18px;
  color: var(--text-sub);
}

.favorites-panel__content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
}
.fav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}
.fav-list:empty {
  display: none;
}
.fav-empty {
  text-align: center;
  padding: var(--space-xl);
  color: var(--text-sub);
  font-size: var(--font-size-sm);
}
.fav-empty small {
  display: block;
  margin-top: var(--space-xs);
  opacity: 0.7;
}

.fav-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-sm);
  background: var(--bg-gray);
}
.fav-item:hover {
  background: var(--bg-gray-dark);
}
.fav-item__title {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--text);
  text-decoration: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.fav-item__title:hover {
  color: var(--primary);
}
.fav-item__remove {
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--text-sub);
  cursor: pointer;
  font-size: 12px;
  border-radius: var(--radius-sm);
}
.fav-item__remove:hover {
  background: var(--border-color);
  color: var(--error);
}
.fav-item__time {
  font-size: 12px;
  color: var(--text-sub);
  white-space: nowrap;
}

.favorites-panel__footer {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-top: 1px solid var(--border-color);
}
.fav-btn {
  flex: 1;
  padding: var(--space-sm);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-sub);
  font-size: var(--font-size-xs);
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.fav-btn:hover {
  border-color: var(--error);
  color: var(--error);
}

/* --------------------------------------------------------------------------
   21. 文章页收藏按钮
   -------------------------------------------------------------------------- */
.article-fav-btn {
  position: fixed;
  bottom: 100px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--bg-white);
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  font-size: 22px;
  cursor: pointer;
  z-index: 100;
  transition: all 0.2s;
}
.article-fav-btn:hover {
  transform: scale(1.1);
}
.article-fav-btn.active {
  background: var(--primary);
  color: #fff;
}

@media (max-width: 768px) {
  .favorites-panel {
    width: 100%;
    right: -100%;
  }
  .article-fav-btn {
    bottom: 80px;
    right: 16px;
    width: 44px;
    height: 44px;
    font-size: 18px;
  }
}