/**
 * Lufer Theme - Main Styles
 *
 * @package Lufer_Theme
 * @version 1.0.0
 */

/* ============================================
   暗色主题配色（备份）
   ============================================
   :root {
     --bg-primary: #0a0e18;
     --bg-secondary: #0f1420;
     --bg-tertiary: #151c2c;
     --bg-card: #0f1420;
     --bg-card-hover: #151c2c;
     --accent-primary: #00d4ff;
     --accent-secondary: #0099cc;
     --accent-tertiary: #0066ff;
     --accent-glow: rgba(0, 212, 255, 0.15);
     --accent-glow-strong: rgba(0, 212, 255, 0.3);
     --accent-glow-subtle: rgba(0, 212, 255, 0.08);
     --text-primary: #e0e0e0;
     --text-secondary: #888888;
     --text-muted: #555555;
     --text-accent: #00d4ff;
     --border-color: rgba(255, 255, 255, 0.06);
     --border-color-hover: rgba(255, 255, 255, 0.12);
     --border-glow: rgba(0, 212, 255, 0.2);
     --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
     --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
     --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
     --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
     --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
     --shadow-glow-lg: 0 0 40px rgba(0, 212, 255, 0.2);
   }
   ============================================ */

/* ============================================
   CSS 变量定义 - 亮色主题
   ============================================ */
:root {
  /* 背景色 - 亮色 */
  --bg-primary: #f8f9fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f0f2f5;
  --bg-card: #ffffff;
  --bg-card-hover: #f8f9fa;
  
  /* 强调色 */
  --accent-primary: #2563eb;
  --accent-secondary: #1d4ed8;
  --accent-tertiary: #3b82f6;
  --accent-glow: rgba(37, 99, 235, 0.1);
  --accent-glow-strong: rgba(37, 99, 235, 0.2);
  --accent-glow-subtle: rgba(37, 99, 235, 0.05);
  
  /* 文字色 */
  --text-primary: #1a1a2e;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --text-accent: #2563eb;
  
  /* 边框 */
  --border-color: rgba(0, 0, 0, 0.08);
  --border-color-hover: rgba(0, 0, 0, 0.15);
  --border-glow: rgba(37, 99, 235, 0.3);
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 4px 20px rgba(37, 99, 235, 0.1);
  --shadow-glow-lg: 0 8px 40px rgba(37, 99, 235, 0.15);
  
  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-display: 'Inter', sans-serif;
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
  --transition-spring: 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  
  /* 布局 */
  --nav-height: 64px;
  --max-width: 1200px;
  --content-padding: clamp(1rem, 3vw, 2rem);
  --sidebar-width: 250px;
}

/* ============================================
   全局重置与基础样式
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* 选中文本样式 */
::selection {
  background: var(--accent-glow-strong);
  color: var(--text-primary);
}

/* 辅助类 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

/* ============================================
   导航栏
   ============================================ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-normal);
}

.site-nav.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.8;
}

.logo-image {
  height: 40px;
  width: auto;
  max-width: 150px;
  object-fit: contain;
}

.logo-icon {
  font-size: 1.5rem;
  filter: drop-shadow(0 0 8px var(--accent-glow-strong));
}

.logo-text {
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-main {
  display: flex;
  align-items: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-item.active .nav-link {
  color: var(--accent-primary);
}

.nav-item.active .nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  color: var(--text-primary);
  background: var(--accent-glow-subtle);
}

.mobile-menu-toggle {
  display: none;
}

/* 移动端导航 */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.mobile-nav.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-inner {
  padding: var(--space-2xl) var(--content-padding);
}

.mobile-nav-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav-link {
  display: block;
  padding: var(--space-md) var(--space-lg);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
}

.mobile-nav-link:hover {
  color: var(--text-primary);
}

.mobile-nav-item.active .mobile-nav-link {
  color: var(--accent-primary);
}

.mobile-nav-item.active .mobile-nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-lg);
  right: var(--space-lg);
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  border-radius: 1px;
}

/* ============================================
   搜索弹窗
   ============================================ */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 20vh;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.search-overlay.active {
  opacity: 1;
  visibility: visible;
}

.search-modal {
  position: relative;
  width: 90%;
  max-width: 600px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--space-md);
  box-shadow: var(--shadow-xl);
  transform: translateY(-20px);
  transition: transform var(--transition-normal);
}

.search-overlay.active .search-modal {
  transform: translateY(0);
}

.search-form {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.search-input {
  flex: 1;
  background: none;
  border: none;
  font-size: 1.1rem;
  color: var(--text-primary);
  padding: var(--space-sm);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--accent-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.search-submit:hover {
  background: var(--accent-glow);
}

.search-close {
  position: absolute;
  top: -48px;
  right: 0;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.search-close:hover {
  color: var(--text-primary);
}

/* ============================================
   页面英雄区
   ============================================ */
.page-hero {
  position: relative;
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-4xl);
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--space-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-greeting {
  display: block;
  font-size: 0.5em;
  font-weight: 400;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

.hero-name {
  display: block;
  font-size: 1.5em;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px var(--accent-glow));
  letter-spacing: -0.02em;
}

.hero-tagline {
  display: block;
  font-size: 0.6em;
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-top: var(--space-sm);
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin: 0 auto var(--space-2xl);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-primary);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* 装饰元素 */
.hero-decoration {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}

.glow-orb-1 {
  width: 300px;
  height: 300px;
  background: var(--accent-primary);
  top: 10%;
  left: 10%;
  animation: float 8s ease-in-out infinite;
}

.glow-orb-2 {
  width: 200px;
  height: 200px;
  background: var(--accent-tertiary);
  bottom: 20%;
  right: 15%;
  animation: float 6s ease-in-out infinite reverse;
}

.grid-pattern {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* ============================================
   筛选栏
   ============================================ */
.filter-section {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--border-color);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.filter-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
  background: var(--bg-tertiary);
}

.filter-btn.active {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
  box-shadow: 0 0 12px var(--accent-glow);
}

.filter-count {
  font-size: 0.75rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

/* ============================================
   文章卡片网格
   ============================================ */
.posts-section {
  padding: var(--space-3xl) 0;
}

.posts-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* 文章卡片 */
.post-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: row;
}

.post-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  background: var(--bg-card-hover);
}

.card-thumbnail {
  position: relative;
  width: 280px;
  min-height: 180px;
  overflow: hidden;
  flex-shrink: 0;
}

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

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

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, transparent 50%, rgba(0, 0, 0, 0.3));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.post-card:hover .card-overlay {
  opacity: 1;
}

.card-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.category-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent-primary);
  background: var(--accent-glow);
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.category-tag:hover {
  background: var(--accent-glow-strong);
  color: var(--accent-primary);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

.card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  display: -webkit-box;
  -webkit-line-clamp: 5;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.card-date,
.card-read-time {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-color);
}

.tag-item {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.card-glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--accent-glow) 0%, transparent 50%);
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.post-card:hover .card-glow {
  opacity: 1;
}

.card-link {
  position: absolute;
  inset: 0;
  z-index: 1;
}

/* ============================================
   分页
   ============================================ */
.pagination {
  display: flex;
  justify-content: center;
  margin-top: var(--space-3xl);
}

.pagination .nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.pagination .page-numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: var(--space-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.pagination .page-numbers:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
  background: var(--bg-tertiary);
}

.pagination .page-numbers.current {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
}

.pagination .prev,
.pagination .next {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.pagination .prev:hover,
.pagination .next:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
}

/* ============================================
   文章详情页
   ============================================ */
.single-post {
  padding-top: var(--nav-height);
}

.post-header {
  position: relative;
  padding: var(--space-4xl) 0 var(--space-2xl);
  border-bottom: 1px solid var(--border-color);
}

.post-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.post-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-lg);
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.post-date,
.post-author,
.post-read-time {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.post-thumbnail-wrapper {
  margin-top: var(--space-2xl);
}

.post-thumbnail {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.header-decoration {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0.5;
}

/* 文章内容布局 */
.post-content-wrapper {
  padding: var(--space-3xl) 0;
}

.post-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 250px;
  gap: var(--space-2xl);
  max-width: 1200px;
  margin: 0 auto;
  align-items: start;
}

/* 目录侧边栏 */
.post-toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
  max-height: calc(100vh - var(--nav-height) - var(--space-3xl));
  overflow-y: auto;
}

.toc-wrapper {
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.toc-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-color);
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.toc-link {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
}

.toc-link.toc-h1 {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.toc-link.toc-h2 {
  padding-left: var(--space-md);
  font-size: 0.85rem;
}

.toc-link:hover {
  color: var(--text-primary);
  background: var(--accent-glow-subtle);
}

.toc-link.active {
  color: var(--accent-primary);
  border-left-color: var(--accent-primary);
  background: var(--accent-glow);
}

.toc-link.toc-h3 {
  padding-left: var(--space-xl);
  font-size: 0.8rem;
}

/* 文章正文 */
.post-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  min-width: 0;
  overflow-wrap: break-word;
  word-break: break-word;
}

.post-content h2 {
  font-size: 1.5rem;
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-color);
}

.post-content h3 {
  font-size: 1.25rem;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
}

.post-content p {
  margin-bottom: var(--space-lg);
}

.post-content a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: all var(--transition-fast);
}

.post-content a:hover {
  color: var(--accent-secondary);
  text-shadow: 0 0 8px var(--accent-glow);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.post-content ul {
  list-style: disc;
}

.post-content ol {
  list-style: decimal;
}

.post-content li {
  margin-bottom: var(--space-sm);
}

.post-content li::marker {
  color: var(--accent-primary);
}

.post-content blockquote {
  margin: var(--space-xl) 0;
  padding: var(--space-lg) var(--space-xl);
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  padding: 2px 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--accent-primary);
}

.post-content pre {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow-x: auto;
  max-width: 100%;
}

.post-content pre code {
  padding: 0;
  background: none;
  border: none;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-all;
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin: var(--space-xl) 0;
}

.post-content table {
  width: 100%;
  margin: var(--space-xl) 0;
  border-collapse: collapse;
}

.post-content th,
.post-content td {
  padding: var(--space-md);
  border: 1px solid var(--border-color);
  text-align: left;
}

.post-content th {
  background: var(--bg-secondary);
  font-weight: 600;
}

.post-content hr {
  margin: var(--space-2xl) 0;
  border: none;
  border-top: 1px solid var(--border-color);
}

/* ============================================
   文章底部
   ============================================ */
.post-footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border-color);
}

.post-share {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.share-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

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

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.share-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-color-hover);
  background: var(--bg-tertiary);
}

.share-btn.twitter:hover {
  color: #1da1f2;
  border-color: #1da1f2;
  background: rgba(29, 161, 242, 0.1);
}

.share-btn.weibo:hover {
  color: #e6162d;
  border-color: #e6162d;
  background: rgba(230, 22, 45, 0.1);
}

/* 文章导航 */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.post-navigation .nav-link {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.post-navigation .nav-link:hover {
  border-color: var(--border-glow);
  background: var(--bg-tertiary);
}

.next-link {
  text-align: right;
}

.nav-direction {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.next-link .nav-direction {
  justify-content: flex-end;
}

.nav-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ============================================
   归档页面
   ============================================ */
.archive-header {
  position: relative;
  padding: calc(var(--nav-height) + var(--space-4xl)) 0 var(--space-3xl);
  border-bottom: 1px solid var(--border-color);
}

.archive-info {
  text-align: center;
}

.archive-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: var(--space-lg);
  color: var(--accent-primary);
  background: var(--accent-glow);
  border-radius: var(--radius-lg);
}

.archive-title {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: var(--space-md);
}

.archive-description {
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.archive-count {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.archive-decoration {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0.5;
}

/* 相关标签 */
.related-terms {
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--border-color);
}

.terms-cloud {
  text-align: center;
}

.terms-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

.tags-cloud .tag-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.tags-cloud .tag-item:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
}

.tag-count {
  font-size: 0.7rem;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
}

/* ============================================
   无文章提示
   ============================================ */
.no-posts {
  text-align: center;
  padding: var(--space-4xl) 0;
}

.no-posts-icon {
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  opacity: 0.5;
}

.no-posts-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  color: var(--text-primary);
}

.no-posts-text {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.btn-primary {
  color: var(--bg-primary);
  background: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-primary:hover {
  color: var(--bg-primary);
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
  box-shadow: 0 0 20px var(--accent-glow);
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

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

.footer-divider {
  height: 1px;
  background: var(--border-color);
  margin-bottom: var(--space-2xl);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

.copyright a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

.footer-powered {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-powered a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer-powered a:hover {
  color: var(--accent-primary);
}

.separator {
  margin: 0 var(--space-sm);
  color: var(--text-muted);
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 100;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
  box-shadow: var(--shadow-glow);
}

/* ============================================
   淡入动画
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   左右分栏布局
   ============================================ */
.main-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-3xl);
  align-items: start;
}

.main-content {
  min-width: 0;
}

/* 侧边栏 */
.sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

.sidebar-widget {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.widget-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-color);
}

.widget-title svg {
  color: var(--accent-primary);
}

/* 标签云 */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tags-cloud .tag-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.tags-cloud .tag-item:hover {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: var(--accent-glow);
}

.tag-count {
  font-size: 0.7rem;
  padding: 1px 5px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

/* 最新文章 */
.recent-posts-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.recent-posts-list li {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-sm);
}

.recent-posts-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.recent-posts-list a {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.recent-posts-list a:hover {
  color: var(--accent-primary);
}

.recent-post-title {
  font-size: 0.85rem;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
  transition: color var(--transition-fast);
}

.recent-posts-list a:hover .recent-post-title {
  color: var(--accent-primary);
}

.recent-post-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  font-family: var(--font-mono);
}

.post-card {
  animation: fadeInUp 0.5s ease forwards;
  opacity: 0;
}

.post-card:nth-child(1) { animation-delay: 0.1s; }
.post-card:nth-child(2) { animation-delay: 0.15s; }
.post-card:nth-child(3) { animation-delay: 0.2s; }
.post-card:nth-child(4) { animation-delay: 0.25s; }
.post-card:nth-child(5) { animation-delay: 0.3s; }
.post-card:nth-child(6) { animation-delay: 0.35s; }
.post-card:nth-child(7) { animation-delay: 0.4s; }
.post-card:nth-child(8) { animation-delay: 0.45s; }
.post-card:nth-child(9) { animation-delay: 0.5s; }

/* ============================================
   WordPress Admin Bar 兼容
   ============================================ */
body.admin-bar .site-nav {
  top: 32px;
}

body.admin-bar .search-overlay {
  top: 32px;
}

body.admin-bar .mobile-nav {
  top: calc(var(--nav-height) + 32px);
}

body.admin-bar .post-toc {
  top: calc(var(--nav-height) + 32px + var(--space-xl));
}

body.admin-bar .back-to-top {
  bottom: calc(var(--space-xl) + 32px);
}

@media (max-width: 782px) {
  body.admin-bar .site-nav {
    top: 46px;
  }
  
  body.admin-bar .search-overlay {
    top: 46px;
  }
  
  body.admin-bar .mobile-nav {
    top: calc(var(--nav-height) + 46px);
  }
  
  body.admin-bar .post-toc {
    top: calc(var(--nav-height) + 46px + var(--space-xl));
  }
  
  body.admin-bar .back-to-top {
    bottom: calc(var(--space-xl) + 46px);
  }
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
  .post-layout {
    grid-template-columns: 1fr;
  }
  
  .post-toc {
    position: static;
    margin-bottom: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }
  
  .nav-main {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .main-layout {
    grid-template-columns: 1fr;
  }
  
  .sidebar {
    position: static;
  }
  
  .posts-grid {
    flex-direction: column;
  }
  
  .post-card {
    flex-direction: column;
  }
  
  .card-thumbnail {
    width: 100%;
    min-height: 200px;
  }
  
  .hero-stats {
    gap: var(--space-xl);
  }
  
  .stat-number {
    font-size: 1.5rem;
  }
  
  .post-navigation {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .filter-bar {
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-md);
  }
  
  .filter-btn {
    white-space: nowrap;
  }
}