/* ===== CSS变量定义 ===== */
:root {
  /* 主色调 - 蓝白主题 */
  --primary-color: #4A90E2;
  --primary-light: #6BA3E8;
  --primary-dark: #3A7BC8;
  --secondary-color: #E8F4FD;
  --accent-color: #2E86AB;
  
  /* 背景色 */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FBFF;
  --bg-tertiary: #EEF7FF;
  --bg-card: #FFFFFF;
  --bg-overlay: rgba(255, 255, 255, 0.95);
  
  /* 文字颜色 */
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --text-inverse: #FFFFFF;
  
  /* 边框颜色 */
  --border-light: #E5F1FF;
  --border-medium: #CCE7FF;
  --border-dark: #B3DDFF;
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(74, 144, 226, 0.08);
  --shadow-md: 0 4px 16px rgba(74, 144, 226, 0.12);
  --shadow-lg: 0 8px 32px rgba(74, 144, 226, 0.16);
  --shadow-xl: 0 16px 64px rgba(74, 144, 226, 0.2);
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #4A90E2 0%, #2E86AB 100%);
  --gradient-secondary: linear-gradient(135deg, #E8F4FD 0%, #FFFFFF 100%);
  --gradient-hero: linear-gradient(135deg, #4A90E2 0%, #6BA3E8 50%, #2E86AB 100%);
  
  /* 动画时长 */
  --transition-fast: 0.2s;
  --transition-normal: 0.3s;
  --transition-slow: 0.5s;
  
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 50%;
}

/* 暗黑模式变量 */
[data-theme="dark"] {
  --bg-primary: #0F1419;
  --bg-secondary: #1A1F2E;
  --bg-tertiary: #252B3A;
  --bg-card: #1E2532;
  --bg-overlay: rgba(15, 20, 25, 0.95);
  
  --text-primary: #FFFFFF;
  --text-secondary: #B8C5D1;
  --text-tertiary: #8A9BA8;
  --text-inverse: #1A1A1A;
  
  --border-light: #2A3441;
  --border-medium: #3A4553;
  --border-dark: #4A5565;
  
  --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 64px rgba(0, 0, 0, 0.6);
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-fast);
}

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

ul, ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===== 导航栏样式 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-overlay);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
}

.nav-brand i {
  font-size: 1.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  position: relative;
  padding: var(--spacing-sm) 0;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

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

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

.search-btn:hover,
.theme-toggle:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== 搜索覆盖层 ===== */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-overlay);
  backdrop-filter: blur(20px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.search-container {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 var(--spacing-lg);
}

.search-input {
  width: 100%;
  height: 60px;
  padding: 0 var(--spacing-xl);
  font-size: 1.25rem;
  border: 2px solid var(--border-medium);
  border-radius: var(--radius-xl);
  background: var(--bg-card);
  color: var(--text-primary);
  outline: none;
  transition: all var(--transition-fast);
}

.search-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

.search-close {
  position: absolute;
  top: 50%;
  right: var(--spacing-lg);
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--text-tertiary);
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.search-close:hover {
  background: var(--primary-color);
  transform: translateY(-50%) scale(1.1);
}

/* ===== 英雄区域 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  opacity: 0.1;
}

.hero-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.3) 1px, transparent 1px),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.3) 1px, transparent 1px),
    radial-gradient(circle at 40% 60%, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
  background-size: 100px 100px, 150px 150px, 200px 200px;
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
  position: relative;
  text-align: center;
  color: var(--text-inverse);
  z-index: 2;
  max-width: 800px;
  padding: 0 var(--spacing-lg);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.title-line {
  display: block;
  opacity: 0;
  transform: translateY(30px);
  animation: slideInUp 0.8s ease-out forwards;
}

.title-line:nth-child(2) {
  animation-delay: 0.2s;
}

@keyframes slideInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
  animation: fadeInUp 0.8s ease-out 0.4s forwards;
  opacity: 0;
}

@keyframes fadeInUp {
  to {
    opacity: 0.9;
    transform: translateY(0);
  }
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2xl);
  margin-top: var(--spacing-2xl);
}

.stat-item {
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  animation: slideInUp 0.6s ease-out forwards;
}

.stat-item:nth-child(1) { animation-delay: 0.6s; }
.stat-item:nth-child(2) { animation-delay: 0.8s; }
.stat-item:nth-child(3) { animation-delay: 1s; }

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* ===== 分类区域 ===== */
.categories {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-secondary);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  color: var(--text-primary);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(74, 144, 226, 0.1), transparent);
  transition: left var(--transition-slow);
}

.category-card:hover::before {
  left: 100%;
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.category-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--text-inverse);
  transition: all var(--transition-normal);
}

.category-card:hover .category-icon {
  transform: scale(1.1) rotate(5deg);
}

.category-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.category-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.5;
}

.category-count {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--secondary-color);
  color: var(--primary-color);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ===== 精选源码区域 ===== */
.featured {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-primary);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.filter-tabs {
  display: flex;
  gap: var(--spacing-sm);
  background: var(--bg-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--radius-lg);
}

.filter-tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.filter-tab.active,
.filter-tab:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl);
}

.source-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
}

.source-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.source-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: var(--gradient-secondary);
}

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

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

.source-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--primary-color);
  color: var(--text-inverse);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
}

.source-content {
  padding: var(--spacing-lg);
}

.source-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  line-height: 1.4;
}

.source-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: var(--spacing-lg);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.source-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
}

.tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--secondary-color);
  color: var(--primary-color);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 500;
}

.source-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.source-stats {
  display: flex;
  gap: var(--spacing-md);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.stat {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.source-price {
  font-weight: 600;
  color: var(--primary-color);
}

.load-more {
  text-align: center;
  margin-top: var(--spacing-2xl);
}

.load-more-btn {
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-fast);
}

.load-more-btn:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

/* ===== 页脚样式 ===== */
.footer {
  background: var(--bg-tertiary);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  border-top: 1px solid var(--border-light);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.footer-section ul li {
  margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-lg);
}

.footer-brand i {
  font-size: 1.5rem;
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-links a {
  width: 40px;
  height: 40px;
  background: var(--bg-card);
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

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

/* ===== 详情页样式 ===== */
.breadcrumb {
  background: var(--bg-secondary);
  padding: var(--spacing-lg) 0;
  margin-top: 70px;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
}

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

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

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

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

.detail-main {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-primary);
}

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 350px;
  gap: var(--spacing-2xl);
}

.detail-content {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.detail-header {
  margin-bottom: var(--spacing-2xl);
}

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

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

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

.meta-item i {
  color: var(--primary-color);
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.detail-preview {
  margin-bottom: var(--spacing-2xl);
}

.preview-gallery {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-secondary);
}

.preview-main {
  position: relative;
  height: 500px;
  overflow: hidden;
}

.preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--transition-normal);
}

.preview-controls {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.preview-main:hover .preview-controls {
  opacity: 1;
}

.preview-btn {
  width: 50px;
  height: 50px;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.preview-btn:hover {
  background: var(--primary-color);
  transform: scale(1.1);
}

.preview-thumbnails {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: var(--bg-card);
}

.thumbnail {
  width: 120px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-md);
  cursor: pointer;
  opacity: 0.6;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.thumbnail.active,
.thumbnail:hover {
  opacity: 1;
  border-color: var(--primary-color);
  transform: scale(1.05);
}

.detail-description {
  margin-bottom: var(--spacing-2xl);
}

.description-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-lg) 0 var(--spacing-md);
}

.description-content p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.feature-list {
  list-style: none;
  margin: var(--spacing-md) 0;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.feature-list li i {
  color: var(--primary-color);
  font-size: 0.875rem;
}

.code-block {
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-md) 0;
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-primary);
}

.tech-stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
}

.tech-item i {
  font-size: 1.25rem;
  color: var(--primary-color);
}

.detail-comments {
  margin-bottom: var(--spacing-2xl);
}

.comment-count {
  color: var(--text-tertiary);
  font-weight: normal;
}

.comment-form {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
}

.rating-input {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.stars {
  display: flex;
  gap: var(--spacing-xs);
}

.stars i {
  font-size: 1.25rem;
  color: var(--text-tertiary);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.stars i:hover,
.stars i.active {
  color: #FFD700;
}

.comment-textarea {
  width: 100%;
  min-height: 100px;
  padding: var(--spacing-md);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  background: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  resize: vertical;
  margin-bottom: var(--spacing-md);
}

.comment-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.submit-comment-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--primary-color);
  color: var(--text-inverse);
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.submit-comment-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.comment-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.comment-avatar {
  flex-shrink: 0;
}

.comment-avatar i {
  font-size: 2.5rem;
  color: var(--text-tertiary);
}

.comment-content {
  flex: 1;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.comment-author {
  font-weight: 600;
  color: var(--text-primary);
}

.comment-rating {
  display: flex;
  gap: var(--spacing-xs);
}

.comment-rating i {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.comment-rating i.active {
  color: #FFD700;
}

.comment-time {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  margin-left: auto;
}

.comment-text {
  color: var(--text-secondary);
  line-height: 1.5;
}

.detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.download-card,
.author-card,
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
}

.download-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.download-header h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.price-tag {
  background: var(--primary-color);
  color: var(--text-inverse);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-weight: 600;
}

.download-info {
  margin-bottom: var(--spacing-lg);
}

.info-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
  font-size: 0.875rem;
}

.info-label {
  color: var(--text-secondary);
}

.info-value {
  color: var(--text-primary);
  font-weight: 500;
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.download-btn {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: all var(--transition-fast);
}

.download-btn.primary {
  background: var(--primary-color);
  color: var(--text-inverse);
}

.download-btn.primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.download-btn.secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.download-btn.secondary:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  border-color: var(--primary-color);
}

.action-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
}

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

.action-btn:hover {
  background: var(--primary-color);
  color: var(--text-inverse);
  transform: translateY(-2px);
}

.author-header {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.author-avatar {
  flex-shrink: 0;
}

.author-avatar i {
  font-size: 3rem;
  color: var(--primary-color);
}

.author-info h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.author-title {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.author-stats {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

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

.author-stats .stat-number {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

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

.follow-btn {
  width: 100%;
  padding: var(--spacing-sm);
  background: var(--primary-color);
  color: var(--text-inverse);
  border-radius: var(--radius-md);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  transition: all var(--transition-fast);
}

.follow-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.related-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

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

.related-thumb {
  flex-shrink: 0;
  border-radius: var(--radius-sm);
}

.related-info {
  flex: 1;
  min-width: 0;
}

.related-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.related-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-lg);
  }
  
  .section-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filter-tabs {
    justify-content: center;
  }
  
  .category-grid {
    grid-template-columns: 1fr;
  }
  
  .source-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .detail-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .preview-thumbnails {
    overflow-x: auto;
  }
  
  .tech-stack {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .nav-container {
    padding: 0 var(--spacing-md);
  }
  
  .hero-content {
    padding: 0 var(--spacing-md);
  }
  
  .detail-content {
    padding: var(--spacing-lg);
  }
  
  .preview-main {
    height: 300px;
  }
  
  .download-card,
  .author-card,
  .related-card {
    padding: var(--spacing-md);
  }
}

/* ===== 动画和过渡效果 ===== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -30px, 0);
  }
  70% {
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0, -4px, 0);
  }
}

@keyframes shake {
  10%, 90% {
    transform: translate3d(-1px, 0, 0);
  }
  20%, 80% {
    transform: translate3d(2px, 0, 0);
  }
  30%, 50%, 70% {
    transform: translate3d(-4px, 0, 0);
  }
  40%, 60% {
    transform: translate3d(4px, 0, 0);
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

.animate-shake {
  animation: shake 0.82s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}

/* ===== 选择文本样式 ===== */
::selection {
  background: rgba(74, 144, 226, 0.2);
  color: var(--text-primary);
}

::-moz-selection {
  background: rgba(74, 144, 226, 0.2);
  color: var(--text-primary);
}

/* ===== 焦点样式 ===== */
:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ===== 加载状态 ===== */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(74, 144, 226, 0.1),
    transparent
  );
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    left: -100%;
  }
  100% {
    left: 100%;
  }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none; }
.visible { display: block; }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

.pointer-events-none { pointer-events: none; }
.pointer-events-auto { pointer-events: auto; }

.select-none { user-select: none; }
.select-text { user-select: text; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }