/* 全局样式 */
:root {
  /* 颜色变量 */
  --color-primary: #7359ff;
  --color-primary-dark: #5a4acc;
  --color-background: #1f1f2b;
  --color-card: #2a2b36;
  --color-sidebar: #16171d;
  --color-text: #ffffff;
  --color-text-secondary: #8f90a2;
  --color-badge-new: #7359ff;
  --color-badge-hot: #ff4757;
  --color-success: #4caf50;
  --color-error: #ff5252;
  
  /* 尺寸变量 */
  --border-radius-sm: 8px;
  --border-radius: 12px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing: 16px;
  --spacing-md: 20px;
  --spacing-lg: 32px;
  --sidebar-width: 240px;
  
  /* 阴影变量 */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow: 0 4px 8px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
  
  /* 过渡变量 */
  --transition-fast: 0.2s ease;
  --transition: 0.3s ease;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}

a {
  text-decoration: none;
  color: inherit;
}

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

ul {
  list-style: none;
}

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

/* 移动端菜单切换按钮 */
.menu-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1100;
  box-shadow: var(--shadow);
  display: none;
}

/* 侧边栏样式 */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar);
  color: var(--color-text);
  padding: var(--spacing-md) 0;
  overflow-y: auto;
  z-index: 1000;
  transition: transform var(--transition);
}

/* Logo样式 */
.sidebar-logo {
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.sidebar-logo img {
  width: 32px;
  height: 32px;
  margin-right: 12px;
  border-radius: 8px;
}

.sidebar-logo span {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

/* 导航区块样式 */
.nav-section {
  margin-bottom: var(--spacing-lg);
  padding: 0 var(--spacing);
}

.nav-section h3 {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 0 var(--spacing-sm);
  margin-bottom: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

/* 导航项样式 */
.nav-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  margin-bottom: 4px;
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--border-radius-sm);
  transition: all var(--transition-fast);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item:hover, 
.nav-item:focus {
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}

.nav-item.active {
  background: var(--color-primary);
  color: white;
}

.nav-item i {
  width: 20px;
  margin-right: 12px;
  font-size: 16px;
  text-align: center;
  min-width: 20px;
}

.nav-item span {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 分隔线 */
.nav-section:not(:last-child) {
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: var(--spacing);
}

/* 滚动条样式 */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* 侧边栏描述文本 */
.sidebar-description {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.5;
  padding: 0 var(--spacing-sm);
  margin-bottom: var(--spacing);
}

/* 侧边栏特性 */
.sidebar-features {
  padding: 0 var(--spacing-sm);
}

.sidebar-features .feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.sidebar-features .feature i {
  color: var(--color-primary);
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.sidebar-features .feature span {
  font-size: 14px;
}

/* 主内容区域调整 */
.main-content {
  margin-left: var(--sidebar-width);
  padding: var(--spacing-md);
  flex: 1 0 auto;
  background: var(--color-background);
  width: calc(100% - var(--sidebar-width));
  transition: margin var(--transition);
  display: flex;
  flex-direction: column;
}

/* 顶部搜索栏 */
.top-bar {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-md);
}

.search-bar {
  flex: 1;
  max-width: 600px;
  position: relative;
}

.search-bar input {
  width: 100%;
  padding: 12px 20px;
  padding-left: 45px;
  border-radius: var(--border-radius-sm);
  border: none;
  background-color: var(--color-card);
  color: var(--color-text);
  font-size: 16px;
  transition: box-shadow var(--transition-fast);
}

.search-bar input:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-primary);
}

.search-bar i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-secondary);
}

/* 搜索建议 */
.search-suggestions {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background-color: var(--color-card);
  border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
  box-shadow: var(--shadow);
  z-index: 10;
  max-height: 300px;
  overflow-y: auto;
  display: none;
}

.search-suggestions.active {
  display: block;
}

.search-suggestion-item {
  padding: var(--spacing-sm) var(--spacing);
  cursor: pointer;
  transition: background var(--transition-fast);
}

.search-suggestion-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* 特色游戏轮播 */
.featured-games {
  margin-bottom: 30px;
}

.featured-slider {
  border-radius: var(--border-radius);
  overflow: hidden;
  position: relative;
  height: 300px;
}

.featured-slide {
  position: relative;
  height: 100%;
}

.featured-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 游戏网格 */
.games-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
}

/* 游戏卡片 */
.game-card {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
  position: relative;
}

.game-card:hover, 
.game-card:focus {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.game-cover {
  position: relative;
  overflow: hidden;
  padding-top: 56.25%; /* 16:9 宽高比 */
}

.game-cover picture,
.game-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 游戏封面图片样式 */
.game-cover img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
  border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
}

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

.game-cover img[src$='.svg'] {
  object-fit: contain;
  padding: var(--spacing-sm);
}

.game-info {
  padding: var(--spacing-sm);
}

.game-info h3 {
  margin: 0 0 var(--spacing-sm);
  font-size: 1rem;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.game-rating {
  display: flex;
  align-items: center;
  gap: 4px;
}

.game-rating i {
  color: #ffd700;
}

.badge {
  position: absolute;
  top: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--spacing-xs);
  font-size: 0.75rem;
  font-weight: 500;
  z-index: 1;
}

.badge.new {
  right: var(--spacing-sm);
  top: var(--spacing-sm);
  background: var(--color-badge-new);
  color: white;
}

.badge.popular {
  right: var(--spacing-sm);
  top: calc(var(--spacing-sm) + 26px); /* 在"新游戏"标签下方 */
  background: var(--color-badge-hot);
  color: white;
}

/* 分类标签 */
.categories-bar {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  overflow-x: auto;
  padding-bottom: var(--spacing-sm);
  scrollbar-width: thin;
}

.categories-bar::-webkit-scrollbar {
  height: 4px;
}

.categories-bar::-webkit-scrollbar-track {
  background: transparent;
}

.categories-bar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
}

.category-tag {
  padding: var(--spacing-sm) var(--spacing);
  background-color: var(--color-card);
  border-radius: 20px;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}

.category-tag:hover,
.category-tag.active {
  background-color: var(--color-primary);
}

.category-tag:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* 游戏特性图标 */
.features-bar {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md);
  background-color: var(--color-card);
  border-radius: var(--border-radius);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text);
}

.feature-item i {
  font-size: 24px;
  color: var(--color-primary);
}

/* 加载更多按钮 */
.load-more-container {
  display: flex;
  justify-content: center;
  margin: var(--spacing-md) 0;
}

.load-more-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  transition: background-color var(--transition-fast);
}

.load-more-btn:hover {
  background-color: var(--color-primary-dark);
}

.load-more-btn:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--color-background), 0 0 0 4px var(--color-primary);
}

/* 加载状态 */
.loading-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 200px;
  grid-column: 1 / -1;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--color-primary);
  animation: spin 1s ease-in-out infinite;
  margin-bottom: var(--spacing-sm);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 模态框 */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--color-card);
  border-radius: var(--border-radius);
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition);
}

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

.close-modal {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  font-size: 24px;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1;
}

.modal-body {
  padding: var(--spacing-md);
}

/* 页脚 */
.main-footer {
  background-color: var(--color-sidebar);
  color: var(--color-text);
  padding: var(--spacing-md) 0;
  margin-left: var(--sidebar-width);
  width: calc(100% - var(--sidebar-width));
  transition: margin var(--transition), width var(--transition);
  margin-top: auto;
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-section h3 {
  font-size: 16px;
  margin-bottom: var(--spacing);
  color: var(--color-text);
}

.footer-section p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing);
  font-size: 14px;
}

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

.footer-section ul li a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  font-size: 14px;
}

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

.footer-section ul li a i {
  margin-right: var(--spacing-sm);
  width: 20px;
  text-align: center;
}

.contact-link {
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: color var(--transition-fast);
}

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

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

.social-links a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background var(--transition-fast);
}

.social-links a:hover {
  background: var(--color-primary);
}

.footer-bottom {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* 响应式设计 */
@media (max-width: 1200px) {
  .games-grid {
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 992px) {
  :root {
      --sidebar-width: 200px;
  }
  
  .featured-slider {
      height: 250px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
      display: flex;
  }
  
  .sidebar {
      transform: translateX(-100%);
  }
  
  .sidebar.active {
      transform: translateX(0);
  }
  
  .main-content, 
  .main-footer {
      margin-left: 0;
      width: 100%;
  }
  
  body {
      display: flex;
      flex-direction: column;
  }
  
  .main-content {
      flex: 1 0 auto;
  }
  
  .main-footer {
      flex-shrink: 0;
  }
  
  .games-grid {
      grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
  
  .features-bar {
      flex-direction: column;
      align-items: flex-start;
      gap: var(--spacing);
  }
}

@media (max-width: 480px) {
  .games-grid {
      grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
      gap: var(--spacing);
  }
  
  .feature-item {
      font-size: 14px;
  }
  
  .feature-item i {
      font-size: 20px;
  }
  
  .categories-bar {
      overflow-x: auto;
      padding-bottom: var(--spacing-sm);
  }
  
  .category-tag {
      padding: 6px 12px;
      font-size: 13px;
  }
  
  .footer-container {
      grid-template-columns: 1fr;
  }
}

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

/* 暗黑模式优化 */
@media (prefers-color-scheme: dark) {
  :root {
      --color-primary: #8f67ff;
  }
}

/* 游戏预览模态框样式 */
.preview-header {
  margin-bottom: var(--spacing-md);
}

.preview-header h2 {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-sm);
}

.preview-header .meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.top-play-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing);
  margin-bottom: var(--spacing);
}

.play-button {
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  text-align: center;
  transition: background-color var(--transition-fast);
  display: inline-block;
}

.play-button:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
}

/* 图片加载占位符 */
.image-loading-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-card);
}

.image-loading-placeholder .spinner {
  width: 30px;
  height: 30px;
  border-width: 3px;
}

/* 游戏详情预览图片样式 */
.preview-image-container {
  width: 100%;
  position: relative;
  margin-bottom: var(--spacing-md);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.preview-image-container img {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.preview-image-container iframe {
  width: 100%;
  display: block;
  aspect-ratio: 16 / 9;
  border: none;
  height: 500px;
}

/* 游戏推荐卡片样式 */
.recommended-games {
  margin-top: var(--spacing-md);
}

.recommended-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing);
  margin-top: var(--spacing);
}

.recommended-card {
  display: flex;
  flex-direction: column;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.recommended-card:hover {
  transform: translateY(-3px);
  background-color: rgba(255, 255, 255, 0.1);
}

.recommended-card img {
  width: 100%;
  height: 68px;
  object-fit: cover;
  border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
  display: block;
}

.rec-info {
  padding: var(--spacing-sm);
}

.rec-info h4 {
  font-size: 14px;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.rec-meta {
  font-size: 12px;
  color: var(--color-text-secondary);
}