/* ===== CSS 变量 ===== */
:root {
  --accent-color: #4a7c59;
  --accent-light: #6b9b7a;
  --accent-dark: #2d5a3d;
  --text-primary: #333;
  --text-secondary: #666;
  --text-muted: #999;
  --bg-primary: #fff;
  --bg-secondary: #f8f9f5;
  --bg-dark: #2c3e2d;
  --border-color: #e8ebe3;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
  --radius: 8px;
  --max-width: 1200px;
  --header-height: 70px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
}

a {
  text-decoration: none;
  color: var(--accent-color);
  transition: color 0.3s;
}

a:hover {
  color: var(--accent-dark);
}

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

ul {
  list-style: none;
}

/* ===== 布局容器 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo::before {
  content: "🍃";
  font-size: 28px;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
}

.nav a:hover,
.nav a.active {
  color: var(--accent-color);
  border-bottom-color: var(--accent-color);
}

/* ===== Main 布局 ===== */
.main {
  padding: 40px 0;
}

/* ===== 网格布局 ===== */
.grid-hero {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

.grid-featured {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

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

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

/* ===== 卡片组件 ===== */
.card {
  background: var(--bg-primary);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

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

.card-body {
  padding: 20px;
}

.card-category {
  display: inline-block;
  font-size: 12px;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-title a {
  color: inherit;
}

.card-title a:hover {
  color: var(--accent-color);
}

.card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 头条卡片 ===== */
.headline-card {
  position: relative;
  height: 100%;
  min-height: 400px;
  border-radius: var(--radius);
  overflow: hidden;
}

.headline-card .card-image {
  position: absolute;
  inset: 0;
  aspect-ratio: auto;
}

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

.headline-card .card-body {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: #fff;
  padding: 40px;
}

.headline-card .card-title {
  font-size: 28px;
  color: #fff;
  margin-bottom: 16px;
}

.headline-card .card-excerpt {
  color: rgba(255,255,255,0.8);
  font-size: 15px;
  -webkit-line-clamp: 2;
}

.headline-card .card-meta {
  color: rgba(255,255,255,0.7);
}

/* ===== 侧边栏 ===== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.widget {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 24px;
}

.widget-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent-color);
  display: inline-block;
}

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

.widget-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.widget-list .num {
  width: 24px;
  height: 24px;
  background: var(--accent-color);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.widget-list a {
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
}

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

/* ===== 区块标题 ===== */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.section-title {
  font-size: 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-title::before {
  content: "";
  width: 4px;
  height: 24px;
  background: var(--accent-color);
  border-radius: 2px;
}

.section-more {
  font-size: 14px;
  color: var(--text-muted);
}

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

/* ===== 推荐区块 ===== */
.recommended-section {
  background: var(--bg-secondary);
  padding: 40px 0;
  margin-bottom: 40px;
}

.recommended-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.recommended-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-color);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.recommended-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.recommended-col li {
  display: flex;
  gap: 12px;
  align-items: center;
}

.recommended-col .dot {
  width: 6px;
  height: 6px;
  background: var(--accent-light);
  border-radius: 50%;
  flex-shrink: 0;
}

.recommended-col a {
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
}

.recommended-col a:hover {
  color: var(--accent-color);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-dark);
  color: #fff;
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  line-height: 1.8;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 30px;
  text-align: center;
  color: rgba(255,255,255,0.5);
  font-size: 13px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  background: var(--bg-secondary);
  padding: 16px 0;
  margin-bottom: 30px;
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.breadcrumb a {
  color: var(--text-secondary);
}

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

.breadcrumb .sep {
  color: var(--text-muted);
}

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

/* ===== 分类页 Hero ===== */
.category-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--accent-dark) 100%);
  color: #fff;
  padding: 60px;
  border-radius: var(--radius);
  margin-bottom: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.category-hero-content h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.category-hero-content p {
  font-size: 16px;
  opacity: 0.9;
  max-width: 500px;
}

.category-hero-stats {
  display: flex;
  gap: 40px;
}

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

.stat-num {
  font-size: 36px;
  font-weight: 700;
  display: block;
}

.stat-label {
  font-size: 14px;
  opacity: 0.8;
}

/* ===== 文章页 ===== */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
}

.article-header {
  margin-bottom: 30px;
}

.article-category {
  display: inline-block;
  background: var(--accent-color);
  color: #fff;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 16px;
}

.article-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 14px;
}

.article-meta .author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-meta .author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 600;
}

.article-featured-image {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 30px;
}

.article-content {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-content h2 {
  font-size: 24px;
  margin: 40px 0 20px;
  color: var(--text-primary);
}

.article-content h3 {
  font-size: 20px;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

.article-content p {
  margin-bottom: 20px;
}

.article-content img {
  border-radius: var(--radius);
  margin: 30px 0;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 24px;
  margin: 30px 0;
  font-style: italic;
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin: 20px 0;
  padding-left: 24px;
}

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

.article-content ul li {
  list-style: disc;
}

.article-content ol li {
  list-style: decimal;
}

/* ===== 侧边栏组件 ===== */
.author-card {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-bottom: 24px;
}

.author-card-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: #fff;
  font-size: 32px;
  font-weight: 600;
}

.author-card h4 {
  font-size: 18px;
  margin-bottom: 8px;
}

.author-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.author-card-social {
  display: flex;
  justify-content: center;
  gap: 16px;
}

.author-card-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 14px;
}

.author-card-social a:hover {
  background: var(--accent-color);
  color: #fff;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-cloud a {
  display: inline-block;
  padding: 6px 14px;
  background: var(--bg-primary);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.tag-cloud a:hover {
  background: var(--accent-color);
  color: #fff;
  border-color: var(--accent-color);
}

/* ===== 404 页面 ===== */
.page-404 {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.page-404-icon {
  font-size: 120px;
  margin-bottom: 24px;
}

.page-404 h1 {
  font-size: 48px;
  margin-bottom: 16px;
}

.page-404 p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--accent-color);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 500;
  transition: all 0.3s;
}

.btn:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .grid-hero {
    grid-template-columns: 1fr;
  }

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

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

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .sidebar {
    display: none;
  }

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

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

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

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

  .grid-4,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .recommended-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .category-hero {
    flex-direction: column;
    text-align: center;
    padding: 40px 24px;
  }

  .category-hero-content h1 {
    font-size: 28px;
  }

  .article-title {
    font-size: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .headline-card .card-body {
    padding: 24px;
  }

  .headline-card .card-title {
    font-size: 20px;
  }
}