/* 现代极简风格主题 - 2023版 */
:root {
  /* 主色调 - 渐变蓝 */
  --primary-color: #4361ee;
  --primary-hover: #3a56d4;
  --primary-light: #eef2ff;
  --secondary-color: #f72585;
  --secondary-hover: #e91e63;
  --secondary-light: #fce7f3;
  
  /* 中性色调 - 高对比度 */
  --text-color: #111827;
  --text-light: #4b5563;
  --text-muted: #9ca3af;
  --bg-color: #f9fafb;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  
  /* 阴影和圆角 - 柔和阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  
  /* 动画 - 平滑过渡 */
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 布局 - 现代布局 */
  --max-width: 1140px;
  --content-padding: 1.25rem;
  --section-spacing: 2.5rem;
  --card-spacing: 1.25rem;
  --header-height: 64px;
  --nav-height: 48px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

/* 布局容器 */
.content {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

main {
  padding: var(--section-spacing) 0;
}

/* 头部样式 */
header {
  background-color: var(--card-bg);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

.logo a {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-form {
  position: relative;
  display: flex;
  align-items: center;
}

.search-form input {
  padding: 0.5rem 1rem 0.5rem 2.5rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--bg-color);
  font-size: 0.875rem;
  width: 200px;
  transition: var(--transition-fast);
}

.search-form input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-light);
  width: 240px;
}

.search-form button {
  position: absolute;
  left: 0.75rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1rem;
  cursor: pointer;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 30px;
  height: 24px;
  position: relative;
  cursor: pointer;
  z-index: 110;
}

.mobile-menu-toggle span {
  display: block;
  position: absolute;
  height: 3px;
  width: 100%;
  background: var(--primary-color);
  border-radius: 3px;
  opacity: 1;
  left: 0;
  transform: rotate(0deg);
  transition: var(--transition-fast);
}

.mobile-menu-toggle span:nth-child(1) {
  top: 0px;
}

.mobile-menu-toggle span:nth-child(2) {
  top: 10px;
}

.mobile-menu-toggle span:nth-child(3) {
  top: 20px;
}

.mobile-menu-toggle.menu-open span:nth-child(1) {
  top: 10px;
  transform: rotate(135deg);
}

.mobile-menu-toggle.menu-open span:nth-child(2) {
  opacity: 0;
  left: -60px;
}

.mobile-menu-toggle.menu-open span:nth-child(3) {
  top: 10px;
  transform: rotate(-135deg);
}

/* 导航栏样式 */
nav {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: var(--header-height);
  z-index: 90;
  max-height: var(--nav-height);
}

.nav-container {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
}

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

.nav-item {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  margin-right: 0.75rem;
  color: var(--text-light);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-lg);
  white-space: nowrap;
  transition: var(--transition);
}

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

.nav-item i {
  margin-right: 0.35rem;
  font-size: 1rem;
}

.nav-item:first-child {
  color: var(--primary-color);
  font-weight: 600;
}

/* 英雄区域 */
.hero-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  margin-bottom: var(--section-spacing);
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.hero-content h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.hero-content p {
  font-size: 1.1rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* 精选区域 */
.featured-section {
  margin-bottom: var(--section-spacing);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-color);
  display: flex;
  align-items: center;
}

.section-header h2 i {
  margin-right: 0.5rem;
  color: var(--primary-color);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-spacing);
}

/* 分类部分样式 */
.categories-container {
  display: flex;
  flex-direction: column;
  gap: var(--section-spacing);
}

.category-section {
  margin-bottom: var(--section-spacing);
}

.category-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--primary-light);
}

.category-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-color);
  display: flex;
  align-items: center;
}

.category-title i {
  margin-right: 0.5rem;
  color: var(--primary-color);
}

.view-more {
  font-size: 0.9rem;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  transition: var(--transition);
  font-weight: 500;
}

.view-more i {
  margin-left: 0.25rem;
  transition: transform 0.2s ease;
}

.view-more:hover i {
  transform: translateX(3px);
}

/* 文章网格布局 */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--card-spacing);
  margin-bottom: var(--section-spacing);
}

/* 文章卡片样式 */
.article {
  background-color: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--border-color);
}

.article:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.article-image {
  position: relative;
  overflow: hidden;
}

.article-image img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform 0.5s ease;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.article-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.3), transparent);
  opacity: 0;
  transition: var(--transition);
}

.article:hover .article-image img {
  transform: scale(1.05);
}

.article:hover .article-overlay {
  opacity: 1;
}

.article-content {
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article h3 {
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.article h3 a {
  color: var(--text-color);
  font-size: 1.1rem;
  font-weight: 600;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}

.article h3 a:hover {
  color: var(--primary-color);
}

.article-meta {
  display: flex;
  align-items: center;
  margin-top: auto;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.article-date {
  display: flex;
  align-items: center;
}

.article-date i {
  margin-right: 0.35rem;
  font-size: 0.9rem;
}

/* 页面头部 */
.page-header {
  margin-bottom: 2rem;
  text-align: center;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-color);
  display: inline-flex;
  align-items: center;
}

.page-header h1 i {
  margin-right: 0.5rem;
  color: var(--primary-color);
}

.page-header p {
  color: var(--text-light);
  font-size: 1rem;
}

/* 文章详情页样式 */
.post-article {
  background-color: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 2.5rem;
  border: 1px solid var(--border-color);
}

.article-header {
  margin-bottom: 1.5rem;
}

.post-article h1 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  color: var(--text-color);
  font-weight: 700;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.article-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.85rem;
  transition: var(--transition);
}

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

.article-featured-image {
  margin: 1.5rem -2rem;
  position: relative;
}

.article-featured-image img {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: 0;
}

.article-content {
  line-height: 1.8;
  color: var(--text-color);
  margin-top: 1.5rem;
}

.article-content p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
}

.article-content a {
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 2px;
  text-decoration-color: var(--primary-light);
}

.article-content a:hover {
  color: var(--primary-hover);
  text-decoration-color: var(--primary-color);
}

/* 相关文章 */
.related-articles {
  margin-top: 3rem;
}

/* 分页样式 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin: 2rem 0;
  gap: 0.5rem;
}

.page-link {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-width: 2.5rem;
  height: 2.5rem;
  padding: 0 0.75rem;
  border-radius: var(--radius-md);
  background-color: var(--card-bg);
  color: var(--text-color);
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.page-link:hover {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-color: var(--primary-light);
}

.page-link.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
  font-weight: 600;
}

.page-link i {
  font-size: 1rem;
}

/* 页脚样式 */
footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  margin-top: var(--section-spacing);
  padding: 3rem 0 1.5rem;
}

.footer-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

.footer-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-logo {
  flex: 1;
  min-width: 250px;
}

.footer-logo h2 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-logo p {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 300px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer-links-column {
  min-width: 150px;
}

.footer-links-column h3 {
  font-size: 1.1rem;
  color: var(--text-color);
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer-links-column ul li {
  margin-bottom: 0.75rem;
}

.footer-links-column ul li a {
  color: var(--text-light);
  font-size: 0.95rem;
  transition: var(--transition);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

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

/* 响应式设计 */
@media (max-width: 1140px) {
  :root {
    --max-width: 100%;
  }
  
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --content-padding: 1rem;
    --section-spacing: 2rem;
    --card-spacing: 1rem;
  }
  
  html {
    font-size: 15px;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .featured-grid {
    grid-template-columns: 1fr;
  }
  
  .search-form {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-container {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: 0;
    flex-direction: column;
    background-color: var(--card-bg);
    overflow: hidden;
    transition: height 0.3s ease;
    padding: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
  }
  
  .nav-container.nav-open {
    height: calc(100vh - var(--header-height));
    padding: 1rem;
    overflow-y: auto;
  }
  
  .nav-item {
    width: 100%;
    margin: 0.5rem 0;
    padding: 0.75rem 1rem;
  }
  
  .footer-top {
    flex-direction: column;
    gap: 2rem;
  }
  
  .footer-links {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .post-article {
    padding: 1.5rem 1rem;
  }
  
  .article-featured-image {
    margin: 1.5rem -1rem;
  }
  
  .post-article h1 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-section {
    padding: 2rem 1rem;
  }
  
  .hero-content h1 {
    font-size: 1.75rem;
  }
  
  .section-header h2 {
    font-size: 1.25rem;
  }
  
  .category-title {
    font-size: 1.1rem;
  }
}