/* 简约现代主题 - 2023 */
:root {
  /* 主色调 */
  --primary-color: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-dark: #2563eb;
  --secondary-color: #10b981;
  --accent-color: #f43f5e;
  
  /* 中性色调 */
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --card-bg-hover: #f1f5f9;
  --border-color: #e2e8f0;
  --text-color: #1e293b;
  --text-muted: #64748b;
  --text-light: #475569;
  
  /* 阴影和圆角 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.05);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* 动画 */
  --transition: all 0.2s ease;
  
  /* 布局 */
  --max-width: 1100px;
  --header-height: 60px;
  --content-padding: 16px;
  --section-spacing: 24px;
  --card-spacing: 12px;
  --thumbnail-size: 80px;
}

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

ul, ol {
  list-style: none;
}

/* 布局容器 */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

/* 头部样式 */
header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  height: var(--header-height);
  box-shadow: var(--shadow-sm);
  display: flex;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo a {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-color);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-form {
  position: relative;
}

.search-form input {
  background-color: var(--card-bg-hover);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 8px 16px 8px 36px;
  color: var(--text-color);
  font-size: 0.9rem;
  width: 200px;
  transition: var(--transition);
}

.search-form input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.search-form button {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  width: 32px;
  height: 32px;
}

/* 导航栏 */
nav {
  margin-top: var(--header-height);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--card-bg);
}

.nav-container {
  display: flex;
  align-items: center;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-container::-webkit-scrollbar {
  display: none;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  margin-right: 8px;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 20px;
  white-space: nowrap;
  transition: var(--transition);
}

.nav-item:hover {
  background-color: var(--card-bg-hover);
  color: var(--primary-hover);
}

.nav-item .icon {
  margin-right: 6px;
}

.nav-item.active {
  background-color: var(--primary-dark);
  color: white;
}

/* 主内容区 */
main {
  padding-top: 16px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

/* 左侧主要内容 */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--section-spacing);
}

/* 右侧边栏 */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--section-spacing);
}

/* 分类标题 */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.section-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-color);
  display: flex;
  align-items: center;
  position: relative;
  padding-left: 10px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 16px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.section-title .icon {
  margin-right: 6px;
  color: var(--primary-color);
}

.view-more {
  display: flex;
  align-items: center;
  color: var(--primary-color);
  font-size: 0.85rem;
  font-weight: 500;
}

.view-more .icon {
  margin-left: 4px;
}

/* 文章网格 */
.articles-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background-color: var(--card-bg);
  padding: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

/* 文章项 */
.article-item {
  display: flex;
  gap: 12px;
  padding: 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border-bottom: 1px solid var(--border-color);
}

.article-item:last-child {
  border-bottom: none;
}

.article-item:hover {
  background-color: var(--card-bg-hover);
}

/* 缩略图 */
.article-thumbnail {
  flex-shrink: 0;
  width: var(--thumbnail-size);
  height: var(--thumbnail-size);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.article-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 文章信息 */
.article-info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}

.article-title {
  margin-bottom: 6px;
  line-height: 1.3;
}

.article-title a {
  color: var(--text-color);
  font-size: 0.95rem;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.article-date {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.75rem;
}

.article-date .icon {
  margin-right: 4px;
}

/* 热门标签卡片 */
.tags-card {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid var(--border-color);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tag-item {
  display: inline-block;
  padding: 4px 10px;
  background-color: var(--card-bg-hover);
  color: var(--text-light);
  border-radius: 20px;
  font-size: 0.8rem;
  transition: var(--transition);
}

.tag-item:hover {
  background-color: var(--primary-color);
  color: white;
}

/* 响应式设计 */
@media (max-width: 900px) {
  main {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    order: -1;
  }
}

@media (max-width: 768px) {
  :root {
    --thumbnail-size: 70px;
  }
  
  .article-title a {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  :root {
    --thumbnail-size: 60px;
  }
  
  .article-item {
    padding: 8px;
    gap: 10px;
  }
  
  .article-title a {
    font-size: 0.85rem;
  }
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 24px;
}

.page-link {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border-radius: var(--radius-md);
  background-color: var(--card-bg);
  color: var(--text-color);
  font-weight: 500;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.page-link:hover {
  background-color: var(--card-bg-hover);
  color: var(--primary-color);
}

.page-link.active {
  background-color: var(--primary-color);
  color: white;
}

/* 文章详情页 */
.post-article {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

.article-header {
  margin-bottom: 16px;
}

.post-article h1 {
  font-size: 1.8rem;
  margin-bottom: 12px;
  line-height: 1.3;
  color: var(--text-color);
  font-weight: 700;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.article-tag {
  display: inline-block;
  padding: 4px 10px;
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--primary-color);
  border-radius: 20px;
  font-size: 0.8rem;
  transition: var(--transition);
}

.article-tag:hover {
  background-color: var(--primary-color);
  color: white;
}

.article-featured-image {
  margin: 16px -24px;
  position: relative;
}

.article-featured-image img {
  width: 100%;
  max-height: 450px;
  object-fit: cover;
  border-radius: 0;
}

.article-content {
  line-height: 1.7;
  color: var(--text-color);
}

.article-content p {
  margin-bottom: 16px;
  font-size: 1rem;
}

/* 页脚 */
footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 30px 0 20px;
  margin-top: var(--section-spacing);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
}

.footer-logo {
  flex: 1;
  min-width: 220px;
}

.footer-logo h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.footer-logo p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links-column h3 {
  font-size: 1rem;
  color: var(--text-color);
  margin-bottom: 10px;
  font-weight: 600;
}

.footer-links-column ul li {
  margin-bottom: 8px;
}

.footer-links-column ul li a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links-column ul li a:hover {
  color: var(--primary-hover);
}

.footer-bottom {
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}