/* ========================================
   马拉松 - 马赛克杂志风格样式
   www.chengpao.cn
   ======================================== */

/* CSS 变量定义 */
:root {
  --accent-color: #673ab7;
  --accent-light: #7e57c2;
  --accent-dark: #512da8;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-light: #9e9e9e;
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-dark: #212121;
  --border-color: #e0e0e0;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
}

/* 重置样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

/* ========================================
   通用组件
   ======================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--accent-color);
  display: inline-block;
}

.card {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.card-content {
  padding: 1rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card-meta {
  font-size: 0.75rem;
  color: var(--text-light);
}

.category-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--accent-color);
  color: white;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--accent-color);
  font-weight: 500;
  font-size: 0.875rem;
}

.read-more:hover {
  color: var(--accent-dark);
}

/* ========================================
   页头
   ======================================== */

.header {
  background: var(--bg-primary);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-color);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav-link {
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-color);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-color);
}

/* ========================================
   面包屑
   ======================================== */

.breadcrumb {
  background: var(--bg-primary);
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.breadcrumb-list a:hover {
  color: var(--accent-color);
}

.breadcrumb-separator {
  color: var(--text-light);
}

.breadcrumb-current {
  color: var(--text-primary);
  font-weight: 500;
}

/* ========================================
   首页布局
   ======================================== */

.home-main {
  padding: 2rem 0;
}

/* 头条区域 */
.headline-section {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.headline-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 400px;
}

.headline-main .card-image {
  position: absolute;
  inset: 0;
}

.headline-main .card-image img {
  height: 100%;
}

.headline-main .card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: white;
  padding: 2rem;
}

.headline-main .card-title {
  font-size: 1.75rem;
  color: white;
  margin-bottom: 0.75rem;
}

.headline-main .card-meta {
  color: rgba(255,255,255,0.8);
}

.headline-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.headline-sidebar .card {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.headline-sidebar .card-image {
  height: 120px;
}

/* 特色内容区域 */
.features-section {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.feature-large {
  grid-row: span 2;
}

.feature-large .card-image {
  height: 300px;
}

.feature-item .card-image {
  height: 160px;
}

/* 三栏文章列表 */
.articles-section {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 2rem 0;
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
}

.article-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.article-list-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.article-list-item:hover {
  background: var(--bg-secondary);
}

.article-list-thumb {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

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

.article-list-content {
  flex: 1;
  min-width: 0;
}

.article-list-title {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-list-meta {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* ========================================
   分类页布局
   ======================================== */

.category-main {
  padding: 2rem 0;
}

.category-hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.category-hero-main {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 300px;
}

.category-hero-main .card-image {
  position: absolute;
  inset: 0;
}

.category-hero-main .card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: white;
  padding: 2rem;
}

.category-hero-main .card-title {
  font-size: 1.5rem;
  color: white;
}

.category-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.category-sidebar .card {
  flex: 1;
}

.category-sidebar .card-image {
  height: 100px;
}

/* 分类内容网格 */
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.category-grid .card-image {
  height: 160px;
}

.category-grid .lead-story {
  grid-column: span 1;
  grid-row: span 2;
}

.category-grid .lead-story .card-image {
  height: 100%;
  min-height: 340px;
}

/* 推荐文章区域 */
.recommended-section {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
}

.recommended-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.tag {
  padding: 0.5rem 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: var(--transition);
}

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

.recommended-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

/* ========================================
   文章详情页布局
   ======================================== */

.article-main {
  padding: 2rem 0;
}

.article-wrapper {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
}

.article-content {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.article-header {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.article-category {
  margin-bottom: 1rem;
}

.article-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.article-featured-image {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
}

.article-body {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 1.5rem 0 0.75rem;
  color: var(--text-primary);
}

.article-body ul,
.article-body ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.article-body ul li {
  list-style: disc;
  margin-bottom: 0.5rem;
}

.article-body ol li {
  list-style: decimal;
  margin-bottom: 0.5rem;
}

.article-inline-media {
  margin: 2rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-inline-media img {
  width: 100%;
  height: auto;
}

.article-inline-caption {
  padding: 1rem;
  background: var(--bg-secondary);
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-align: center;
}

/* 侧边栏 */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sidebar-widget {
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.widget-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--accent-color);
}

.author-card {
  text-align: center;
}

.author-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  object-fit: cover;
}

.author-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.author-bio {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.author-stats {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.author-stat {
  text-align: center;
}

.author-stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-color);
}

.author-stat-label {
  font-size: 0.75rem;
  color: var(--text-light);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.related-item {
  display: flex;
  gap: 0.75rem;
}

.related-thumb {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-content {
  flex: 1;
}

.related-title {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-meta {
  font-size: 0.75rem;
  color: var(--text-light);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-sm {
  padding: 0.25rem 0.75rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.tag-sm:hover {
  background: var(--accent-color);
  color: white;
}

/* ========================================
   404页面
   ======================================== */

.error-page {
  min-height: calc(100vh - 64px - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 0;
}

.error-content {
  text-align: center;
  max-width: 500px;
}

.error-code {
  font-size: 8rem;
  font-weight: 800;
  color: var(--accent-color);
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.8;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.error-message {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.error-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: var(--transition);
}

.btn-primary {
  background: var(--accent-color);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-dark);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--border-color);
}

/* ========================================
   页脚
   ======================================== */

.footer {
  background: var(--bg-dark);
  color: white;
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 1rem;
}

.footer-brand .logo-icon {
  background: var(--accent-light);
}

.footer-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
  .headline-section,
  .category-hero {
    grid-template-columns: 1fr;
  }

  .headline-sidebar {
    flex-direction: row;
  }

  .headline-sidebar .card {
    flex: 1;
  }

  .features-section {
    grid-template-columns: 1fr 1fr;
  }

  .feature-large {
    grid-row: span 1;
    grid-column: span 2;
  }

  .articles-section {
    grid-template-columns: 1fr;
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-grid .lead-story {
    grid-column: span 2;
    grid-row: span 1;
  }

  .category-grid .lead-story .card-image {
    height: 200px;
    min-height: auto;
  }

  .article-wrapper {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .headline-main {
    min-height: 300px;
  }

  .headline-main .card-title {
    font-size: 1.25rem;
  }

  .headline-sidebar {
    flex-direction: column;
  }

  .features-section {
    grid-template-columns: 1fr;
  }

  .feature-large {
    grid-column: span 1;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .category-grid .lead-story {
    grid-column: span 1;
  }

  .recommended-columns {
    grid-template-columns: 1fr;
  }

  .article-title {
    font-size: 1.5rem;
  }

  .article-featured-image {
    height: 200px;
  }

  .error-code {
    font-size: 5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}