/* CSS Custom Properties - 现代蓝白主题 */
:root {
  /* 基础色 - 参考tool2.md的配色方案 */
  --bg-primary: #F5F7FA;
  --bg-secondary: #FFFFFF;
  --bg-hover: #E8EBF0;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border: #E1E5E9;
  
  /* tool2.md的主色调 */
  --accent-primary: #5B6AFF;
  --accent-secondary: #8C54FF;
  --accent-light: #F0F2FF;
  --accent-hover: #667EEA;
  
  /* 暗色主题 */
  --dark-bg-primary: #1A1A1A;
  --dark-bg-secondary: #2D2D2D;
  --dark-bg-hover: #404040;
  --dark-text-primary: #FFFFFF;
  --dark-text-secondary: #CCCCCC;
  --dark-text-muted: #999999;
  --dark-border: #404040;
  
  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* 字体系统 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  
  /* 圆角 */
  --radius: 8px;
  --radius-lg: 12px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.15);
  
  /* 动画 */
  --transition: all 0.2s ease-out;
  --transition-fast: all 0.15s ease-out;
}

/* 暗色主题 */
[data-theme="dark"] {
  --bg-primary: var(--dark-bg-primary);
  --bg-secondary: var(--dark-bg-secondary);
  --bg-hover: var(--dark-bg-hover);
  --text-primary: var(--dark-text-primary);
  --text-secondary: var(--dark-text-secondary);
  --text-muted: var(--dark-text-muted);
  --border: var(--dark-border);
  --accent-light: rgba(91, 106, 255, 0.1);
}

[data-theme="dark"] .tool-card {
  background-color: var(--dark-bg-secondary);
}

[data-theme="dark"] .top-nav {
  background-color: var(--dark-bg-secondary);
}

[data-theme="dark"] .sidebar {
  background-color: var(--dark-bg-secondary);
}

/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: var(--transition);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* 页面包装器 */
.page-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 顶部导航栏 */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-lg);
  z-index: 1000;
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.nav-left {
  display: flex;
  align-items: center;
  min-width: 240px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
}

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

.nav-center {
  flex: 1;
  display: flex;
  justify-content: center;
  max-width: 600px;
}

.search-container {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  height: 40px;
  padding: 0 var(--spacing-md) 0 var(--spacing-2xl);
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  background-color: var(--bg-secondary);
  box-shadow: 0 0 0 3px var(--accent-light), 0 2px 8px rgba(91, 106, 255, 0.15);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-width: 240px;
  justify-content: flex-end;
}

/* 语言选择器 */
.lang-selector {
  position: relative;
}

.lang-selector-btn {
  height: 40px;
  padding: 0 var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: var(--transition);
  font-size: var(--font-size-sm);
  min-width: 110px;
}

.lang-selector-btn:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.current-lang {
  flex: 1;
  text-align: left;
  font-weight: 500;
}

.dropdown-arrow {
  transition: transform 0.2s ease;
}

.lang-selector.active .dropdown-arrow {
  transform: rotate(180deg);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 1100;
  overflow: hidden;
}

.lang-selector.active .lang-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.lang-option:hover {
  background-color: var(--bg-hover);
}

.lang-flag {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.lang-name {
  flex: 1;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

.lang-check {
  opacity: 0;
  color: var(--accent-primary);
  transition: var(--transition);
}

.lang-option.active .lang-check {
  opacity: 1;
}

.lang-option.active {
  background-color: var(--accent-light);
  color: var(--accent-primary);
}

.lang-option.active .lang-name {
  color: var(--accent-primary);
  font-weight: 600;
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: block;
}

/* 主容器 */
.main-container {
  display: flex;
  margin-top: 60px;
  min-height: calc(100vh - 60px);
}

/* 主内容区 */
.main-content {
  flex: 1;
  margin-left: 0; /* 移除左侧边栏margin */
  padding: 0; /* Hero区域不需要padding */
  max-width: 100%;
  min-height: 500px;
}

/* Hero区域 */
.hero-section {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-xl);
  max-width: 100%;
  margin: 0 auto;
  padding-top: 80px;
  padding-bottom: 60px;
  background: #ffffff;
  color: #111827;
  position: relative;
  overflow: hidden;
}

/* Hero背景装饰效果 - 自然的蓝色渐变光晕 */
.hero-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(66, 133, 244, 0.04) 0%, rgba(66, 133, 244, 0.02) 40%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(138, 180, 248, 0.035) 0%, rgba(138, 180, 248, 0.015) 40%, transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) translateX(0) scale(1);
  }
  33% {
    transform: translateY(-25px) translateX(15px) scale(1.05);
  }
  66% {
    transform: translateY(-15px) translateX(-20px) scale(0.98);
  }
}

.hero-title {
  font-size: 42px;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  letter-spacing: -0.5px;
  position: relative;
  z-index: 2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.03);
}

.hero-accent-bar {
  display: none;
}

.hero-subtitle {
  font-size: 17px;
  color: #525252;
  margin-bottom: var(--spacing-xl);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 2;
  line-height: 1.7;
}

/* Hero搜索框 */
.hero-search {
  position: relative;
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  z-index: 2;
}

.hero-search-icon {
  position: absolute;
  left: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  color: #9ca3af;
  pointer-events: none;
  z-index: 2;
  transition: var(--transition);
}

.hero-search-input {
  width: 100%;
  height: 56px;
  padding: 0 var(--spacing-lg) 0 56px;
  border: 2px solid rgba(181, 207, 238, 0.3);
  border-radius: 14px;
  background-color: #ffffff;
  color: #111827;
  font-size: var(--font-size-base);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 16px rgba(181, 207, 238, 0.12), 0 1px 3px rgba(0, 0, 0, 0.06);
}

.hero-search-input:focus {
  outline: none;
  border-color: #b5cfee;
  background-color: #ffffff;
  box-shadow: 0 8px 24px rgba(181, 207, 238, 0.25), 0 0 0 4px rgba(181, 207, 238, 0.1);
  transform: translateY(-1px);
}

.hero-search-input:focus ~ .hero-search-icon {
  color: #b5cfee;
  transform: translateY(-50%) scale(1.1);
}

.hero-search-input::placeholder {
  color: #9ca3af;
}

/* 内容区域 */
.content-section {
  max-width: 1400px;
  margin: 0 auto;
  padding: 32px 24px;
  background-color: var(--bg-primary);
}

/* 分类标签 */
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: 24px;
}

.category-tag {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}

.category-tag:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.category-tag.active {
  background-color: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
}

/* 工具卡片网格容器 */
.tools-grid {
  /* 移除固定宽度和居中，让它跟随.content-section */
}

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

.content-header h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.content-header p {
  font-size: var(--font-size-base);
  color: var(--text-secondary);
}

/* 工具卡片网格 */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: var(--spacing-2xl);
}

/* 工具卡片 - 纵向��局 */
.tool-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 12px;
}

.tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  opacity: 0;
  transition: all 0.3s ease;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  border-color: var(--accent-primary);
}

.tool-card:hover::before {
  opacity: 1;
}

.tool-card:active {
  transform: translateY(-3px) scale(0.98);
}

.card-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  flex-shrink: 0;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.card-icon svg {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

/* 不同分类的图标渐变色 - 参考Figma/Dribbble风格 */
.card-icon.calculator {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.card-icon.converter {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  box-shadow: 0 8px 20px rgba(240, 147, 251, 0.3);
}

.card-icon.game {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  box-shadow: 0 8px 20px rgba(79, 172, 254, 0.3);
}

.card-icon.productivity {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  box-shadow: 0 8px 20px rgba(67, 233, 123, 0.3);
}

.card-icon.text {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  box-shadow: 0 8px 20px rgba(250, 112, 154, 0.3);
}

.card-icon.other {
  background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
  box-shadow: 0 8px 20px rgba(168, 237, 234, 0.3);
}

/* 简洁的图标光泽效果 */
.card-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
  border-radius: 12px;
}

/* 悬停时图标效果 */
.tool-card:hover .card-icon {
  transform: scale(1.05);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 新分类的图标配色 */
.card-icon.dev {
  background: var(--accent-primary);
  box-shadow: 0 4px 12px rgba(91, 106, 255, 0.25);
}

.card-icon.text {
  background: #10b981;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
}

.card-icon.image {
  background: #f59e0b;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.25);
}

.card-icon.doc {
  background: #8B5CF6;
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.25);
}

.card-icon.scientific {
  background: #6366F1;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.card-icon.unit {
  background: #06b6d4;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.25);
}

.card-icon.office {
  background: #f97316;
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.25);
}

.card-icon.health {
  background: #22C55E;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.25);
}

.card-icon.expense {
  background: #EAB308;
  box-shadow: 0 4px 12px rgba(234, 179, 8, 0.25);
}

.card-icon.life {
  background: #ec4899;
  box-shadow: 0 4px 12px rgba(236, 72, 153, 0.25);
}

.card-icon.game {
  background: #A855F7;
  box-shadow: 0 4px 12px rgba(168, 85, 247, 0.25);
}

/* 悬停时的简洁效果 */
.tool-card:hover .card-icon {
  box-shadow: 0 6px 16px rgba(91, 106, 255, 0.35);
}

/* 卡片内容区域 */
.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-description {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 2px;
}

.card-tag {
  font-size: 12px;
  padding: 3px 8px;
  background-color: var(--bg-hover);
  color: var(--text-secondary);
  border-radius: 4px;
  font-weight: 500;
}

/* 移除卡片按钮样式 - 整个卡片可点击 */
.card-action {
  display: none;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-muted);
  max-width: 1200px;
  margin: 0 auto;
}

.empty-state svg {
  margin-bottom: var(--spacing-lg);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 40px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .hero-section {
    padding-top: 70px;
    padding-bottom: 50px;
  }

  .tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .top-nav {
    padding: 0 var(--spacing-md);
  }

  .nav-left {
    min-width: auto;
  }

  .nav-center {
    max-width: 200px;
  }

  .nav-right {
    min-width: auto;
  }

  .search-container {
    max-width: 200px;
  }

  .hero-section {
    padding-top: 60px;
    padding-bottom: 48px;
  }

  .hero-section::before,
  .hero-section::after {
    width: 320px;
    height: 320px;
  }

  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-search-input {
    height: 50px;
    border-radius: 12px;
  }

  .category-tags {
    gap: var(--spacing-xs);
  }

  .category-tag {
    font-size: 13px;
    padding: 8px 16px;
  }

  .tools-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-md) var(--spacing-xl);
  }

  .content-header h1 {
    font-size: var(--font-size-xl);
  }
}

@media (max-width: 480px) {
  .top-nav {
    padding: 0 var(--spacing-sm);
  }
  
  .search-container {
    max-width: 150px;
  }
  
  .main-content {
    padding: var(--spacing-md);
  }
  
  .tool-card {
    padding: var(--spacing-md);
  }
  
  .card-icon {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-lg);
  }
}

/* 加载动画 */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 1s ease-in-out infinite;
}

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

/* 骨架屏动画 */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-hover) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

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

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

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

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

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

/* 选择文本样式 */
::selection {
  background-color: var(--accent-light);
  color: var(--accent-primary);
}

/* 页脚样式 - 覆盖在sidebar上层 */
.footer {
  position: relative;
  width: 100% !important;
  max-width: 100% !important;
  background-color: var(--bg-secondary) !important;
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0 var(--spacing-md); /* 减少padding */
  margin: 0 !important;
  left: 0 !important;
  right: 0 !important;
  box-sizing: border-box;
  z-index: 950; /* 高于sidebar的850 */
}

/* 强制移除任何可能的偏移 */
.footer * {
  box-sizing: border-box;
}

.footer-container {
  max-width: 100%; /* 全宽布局 */
  margin: 0; /* 不居中 */
  padding: 0 64px; /* 增加左右padding到64px */
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start; /* 顶部对齐 */
}

/* 左侧品牌区 */
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.footer-logo-icon {
  color: var(--accent-primary);
  flex-shrink: 0;
}

.footer-logo-text {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.social-link:hover {
  background-color: var(--accent-primary);
  color: white;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* 中间和右侧栏 */
.footer-section {
  display: flex;
  flex-direction: column;
}

.footer-section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
  display: inline-block;
}

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

/* 底部版权区 */
.footer-bottom {
  max-width: 100%; /* 全宽 */
  margin: 0; /* 不居中 */
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) 64px; /* 左右padding与container一致 */
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-copyright {
  color: var(--text-tertiary);
  font-size: 13px;
  margin: 0;
}

/* 暗色主题页脚适配 */
[data-theme="dark"] .footer {
  background-color: #1a1a1a;
  border-top-color: #2a2a2a;
}

[data-theme="dark"] .social-link {
  background-color: #2a2a2a;
  border-color: #3a3a3a;
}

[data-theme="dark"] .social-link:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
}

[data-theme="dark"] .footer-bottom {
  border-top-color: #2a2a2a;
}

/* 响应式页脚 */
@media (max-width: 768px) {
  .footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
  }

  .footer-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    padding: 0 var(--spacing-lg);
  }

  .footer-brand {
    gap: var(--spacing-md);
  }

  .footer-logo-text {
    font-size: 18px;
  }

  .footer-social {
    gap: var(--spacing-sm);
  }

  .social-link {
    width: 36px;
    height: 36px;
  }

  .footer-section-title {
    font-size: 15px;
    margin-bottom: var(--spacing-sm);
  }

  .footer-link {
    font-size: 13px;
  }

  .footer-bottom {
    padding: var(--spacing-md) var(--spacing-lg) 0;
    margin-top: var(--spacing-md);
  }

  .footer-copyright {
    font-size: 12px;
  }
}