/* 渐变色Footer组件 - 简洁版本 */
.footer {
  background: linear-gradient(135deg, 
    #667eea 0%, 
    #764ba2 25%, 
    #f093fb 50%, 
    #f5576c 75%, 
    #4facfe 100%);
  color: #ffffff;
  padding: 80px 0 40px;
  font-size: 15px;
  line-height: 1.8;
  position: relative;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 音乐播放器样式 - 毛玻璃风格 */
.music-player {
  position: fixed !important;
  bottom: 0 !important;
  left: 0 !important;
  right: 0 !important;
  background: rgba(0, 0, 0, 0.85) !important;
  backdrop-filter: blur(40px) saturate(180%) !important;
  -webkit-backdrop-filter: blur(40px) saturate(180%) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.2) !important;
  z-index: 9999 !important;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
  box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.1) !important;
  min-height: 80px !important;
}

.music-player::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.1) 0%, 
    rgba(255, 255, 255, 0.05) 50%, 
    rgba(255, 255, 255, 0.1) 100%);
  pointer-events: none;
  z-index: -1;
}

.music-player.expanded {
  height: auto;
  max-height: 60vh;
  box-shadow: 0 -15px 50px rgba(0, 0, 0, 0.4);
}

.player-main {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  gap: 20px;
  min-height: 80px;
  position: relative;
}

.song-info {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

.song-cover {
  width: 55px;
  height: 55px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  border: 2px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.song-cover::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, 
    rgba(255, 107, 107, 0.2) 0%, 
    rgba(78, 205, 196, 0.2) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.song-cover:hover::before {
  opacity: 1;
}

.song-details {
  min-width: 0;
  flex: 1;
}

.song-title {
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.song-artist {
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0.9;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 8px;
}

.control-btn, .play-btn {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  border-radius: 50%;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  position: relative;
  overflow: hidden;
  box-shadow: 
    0 4px 16px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.control-btn::before, .play-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.15), 
    transparent);
  transition: left 0.6s ease;
}

.control-btn:hover::before, .play-btn:hover::before {
  left: 100%;
}

.control-btn {
  font-size: 18px;
  width: 42px;
  height: 42px;
  font-weight: bold;
}

.play-btn {
  font-size: 20px;
  width: 52px;
  height: 52px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 
    0 6px 20px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.control-btn:hover, .play-btn:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 
    0 8px 25px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.play-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 
    0 10px 30px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.control-btn:active, .play-btn:active {
  transform: translateY(0) scale(0.95);
  background: rgba(255, 255, 255, 0.08);
}

.progress-section {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 2;
  min-width: 220px;
  padding: 0 8px;
}

.time-display {
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  font-weight: 600;
  min-width: 40px;
  text-align: center;
  background: rgba(255, 255, 255, 0.08);
  padding: 6px 10px;
  border-radius: 12px;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all 0.3s ease;
  box-shadow: 
    inset 0 2px 4px rgba(0, 0, 0, 0.1),
    0 1px 0 rgba(255, 255, 255, 0.1);
}

.progress-bar:hover {
  transform: scaleY(1.1);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
}

.progress-fill {
  height: 100%;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 12px;
  transition: width 0.1s ease;
  position: relative;
  box-shadow: 
    0 0 12px rgba(255, 255, 255, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.progress-fill::after {
  content: '';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  box-shadow: 
    0 0 8px rgba(255, 255, 255, 0.6),
    0 2px 4px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
}

.progress-bar:hover .progress-fill::after {
  transform: translateY(-50%) scale(1.2);
  box-shadow: 
    0 0 12px rgba(255, 255, 255, 0.8),
    0 4px 8px rgba(0, 0, 0, 0.3);
}

.volume-section {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 120px;
  padding: 0 8px;
}

.volume-icon {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
  transition: all 0.3s ease;
}

.volume-icon:hover {
  transform: scale(1.1);
  filter: drop-shadow(0 4px 8px rgba(255, 107, 107, 0.4));
}

.volume-slider {
  width: 80px;
  height: 8px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all 0.3s ease;
  box-shadow: 
    inset 0 2px 4px rgba(0, 0, 0, 0.1),
    0 1px 0 rgba(255, 255, 255, 0.1);
}

.volume-slider:hover {
  transform: scaleY(1.1);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.18);
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 
    0 0 8px rgba(255, 255, 255, 0.6),
    0 2px 4px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
}

.volume-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 
    0 0 12px rgba(255, 255, 255, 0.8),
    0 4px 8px rgba(0, 0, 0, 0.3);
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 
    0 0 8px rgba(255, 255, 255, 0.6),
    0 2px 4px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.expand-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: bold;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  position: relative;
  overflow: hidden;
  box-shadow: 
    0 2px 8px rgba(0, 0, 0, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.expand-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.15), 
    transparent);
  transition: left 0.6s ease;
}

.expand-btn:hover::before {
  left: 100%;
}

.expand-btn:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 
    0 6px 20px rgba(0, 0, 0, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.expand-btn:active {
  transform: translateY(0) scale(0.95);
  background: rgba(255, 255, 255, 0.06);
}

/* 播放列表样式 - 毛玻璃风格 */
.playlist {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  max-height: 320px;
  overflow-y: auto;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  animation: slideDown 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 -4px 16px rgba(0, 0, 0, 0.1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.playlist h4 {
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  padding: 20px 24px 15px;
  margin: 0;
  border-bottom: 2px solid transparent;
  border-image: linear-gradient(90deg, 
    rgba(255, 107, 107, 0.3) 0%, 
    rgba(78, 205, 196, 0.3) 100%) 1;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  background: linear-gradient(135deg, #ffffff 0%, #f0f0f0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.playlist h4::before {
  content: '🎵';
  position: absolute;
  left: -5px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  animation: musicNote 2s ease-in-out infinite;
}

@keyframes musicNote {
  0%, 100% { transform: translateY(-50%) rotate(0deg); }
  50% { transform: translateY(-55%) rotate(5deg); }
}

.playlist-item {
  display: flex;
  align-items: center;
  padding: 16px 24px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.playlist-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.08), 
    transparent);
  transition: left 0.6s ease;
}

.playlist-item:hover::before {
  left: 100%;
}

.playlist-item:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(8px);
  box-shadow: 
    inset 4px 0 0 rgba(255, 255, 255, 0.3),
    0 2px 8px rgba(0, 0, 0, 0.1);
}

.playlist-item.active {
  background: rgba(255, 255, 255, 0.12);
  border-left: 4px solid rgba(255, 255, 255, 0.6);
  box-shadow: 
    inset 4px 0 0 rgba(255, 255, 255, 0.4),
    0 4px 16px rgba(0, 0, 0, 0.15);
}

.playlist-cover {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  object-fit: cover;
  margin-right: 16px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.playlist-cover::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, 
    rgba(255, 107, 107, 0.3) 0%, 
    rgba(78, 205, 196, 0.3) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.playlist-item:hover .playlist-cover::before {
  opacity: 1;
}

.playlist-item:hover .playlist-cover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
  border-color: rgba(255, 255, 255, 0.3);
}

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

.playlist-title {
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

.playlist-item:hover .playlist-title {
  color: #ff6b6b;
  transform: translateX(4px);
}

.playlist-artist {
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.3s ease;
}

.playlist-item:hover .playlist-artist {
  color: rgba(255, 255, 255, 0.9);
  transform: translateX(4px);
}

.playing-indicator {
  color: #ff6b6b;
  font-size: 16px;
  font-weight: bold;
  margin-left: 12px;
  animation: musicPulse 1.5s ease-in-out infinite;
  filter: drop-shadow(0 2px 4px rgba(255, 107, 107, 0.5));
}

@keyframes musicPulse {
  0%, 100% { 
    opacity: 1; 
    transform: scale(1) rotate(0deg);
  }
  50% { 
    opacity: 0.7; 
    transform: scale(1.1) rotate(5deg);
  }
}

/* 自定义滚动条 */
.playlist::-webkit-scrollbar {
  width: 6px;
}

.playlist::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}

.playlist::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, 
    #ff6b6b 0%, 
    #4ecdc4 100%);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.playlist::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, 
    #ff5252 0%, 
    #26c6da 100%);
  box-shadow: 0 2px 10px rgba(255, 107, 107, 0.4);
}

/* 响应式设计 - 音乐播放器 */
@media (max-width: 768px) {
  .player-main {
    padding: 10px 15px;
    gap: 10px;
  }
  
  .song-cover {
    width: 40px;
    height: 40px;
  }
  
  .song-title {
    font-size: 13px;
  }
  
  .song-artist {
    font-size: 11px;
  }
  
  .progress-section {
    min-width: 150px;
  }
  
  .volume-section {
    min-width: 80px;
  }
  
  .volume-slider {
    width: 50px;
  }
}

@media (max-width: 480px) {
  .player-main {
    flex-wrap: wrap;
    padding: 8px 12px;
  }
  
  .song-info {
    order: 1;
    flex: 1 1 100%;
    margin-bottom: 8px;
  }
  
  .player-controls {
    order: 2;
    flex: 0 0 auto;
  }
  
  .progress-section {
    order: 3;
    flex: 1 1 100%;
    margin: 8px 0;
  }
  
  .volume-section {
    order: 4;
    flex: 0 0 auto;
  }
  
  .expand-btn {
    order: 5;
    flex: 0 0 auto;
  }
  
  .playlist h4 {
    padding: 12px 15px 8px;
    font-size: 13px;
  }
  
  .playlist-item {
    padding: 8px 15px;
  }
  
  .playlist-cover {
    width: 30px;
    height: 30px;
  }
  
  .playlist-title {
    font-size: 12px;
  }
  
  .playlist-artist {
    font-size: 10px;
  }
}

/* 为页脚添加底部间距，避免被音乐播放器遮挡 */
body {
  padding-bottom: 70px;
}

@media (max-width: 480px) {
  body {
    padding-bottom: 120px;
  }
}

.footer .container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 30px;
  position: relative;
  z-index: 2;
}

/* 友情链接区域 */
.footer-content {
  margin-bottom: 50px;
  text-align: center;
}

.footer-section h4 {
  color: #ffffff;
  font-size: 28px;
  margin-bottom: 35px;
  font-weight: 700;
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  position: relative;
  display: inline-block;
  letter-spacing: 1px;
}

.footer-section h4::before {
  content: '';
  position: absolute;
  top: -10px;
  left: -10px;
  right: -10px;
  bottom: -10px;
  background: linear-gradient(45deg, 
    rgba(255, 255, 255, 0.1) 0%, 
    rgba(255, 255, 255, 0.05) 50%, 
    rgba(255, 255, 255, 0.1) 100%);
  border-radius: 15px;
  z-index: -1;
}

.footer-section h4::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, 
    #64b5f6 0%, 
    #42a5f5 25%, 
    #2196f3 50%, 
    #1976d2 75%, 
    #0d47a1 100%);
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(33, 150, 243, 0.4);
}

.friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: center;
  align-items: center;
  margin-top: 40px;
}

.friend-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.friend-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.2), 
    transparent);
  transition: left 0.6s ease;
}

.friend-link:hover::before {
  left: 100%;
}

.friend-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
}

.friend-link:active {
  transform: translateY(-1px) scale(0.98);
}

/* 页脚底部区域 */
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  gap: 50px;
  margin-top: 30px;
}

.footer-info {
  flex: 1;
}

.footer-info p {
  margin: 0 0 16px 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  line-height: 1.7;
}

.footer-info p:first-child {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* 联系信息样式 */
.contact-info {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0;
  padding: 8px 0;
}

.contact-info .contact-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  font-size: 12px;
}

.contact-info a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: all 0.3s ease;
  padding: 4px 8px;
  border-radius: 6px;
}

.contact-info a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.icp-info {
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-top: 15px;
}

.icp-info a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
  font-size: 13px;
}

.icp-info a:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.separator {
  color: rgba(255, 255, 255, 0.4);
  margin: 0 8px;
  font-weight: 300;
}

/* 社交媒体链接 */
.social-links {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.social-link {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: 14px 20px;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.social-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
}

.social-link:active {
  transform: translateY(-2px) scale(1.02);
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .footer {
    padding: 60px 0 30px;
  }
  
  .footer .container {
    padding: 0 25px;
  }
  
  .footer-section h4 {
    font-size: 24px;
    margin-bottom: 30px;
  }
  
  .friend-links {
    gap: 15px;
  }
  
  .footer-bottom {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .footer {
    padding: 50px 0 25px;
  }
  
  .footer .container {
    padding: 0 20px;
  }
  
  .footer-section h4 {
    font-size: 22px;
    margin-bottom: 25px;
  }
  
  .friend-links {
    gap: 12px;
    justify-content: center;
  }
  
  .friend-link {
    padding: 10px 18px;
    font-size: 13px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 30px;
    text-align: center;
  }
  
  .footer-info {
    text-align: center;
  }
  
  .icp-info {
    justify-content: center;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .contact-info {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .footer {
    padding: 40px 0 20px;
    font-size: 13px;
  }
  
  .footer .container {
    padding: 0 15px;
  }
  
  .footer-section h4 {
    font-size: 20px;
    margin-bottom: 20px;
  }
  
  .friend-links {
    gap: 10px;
    flex-direction: column;
    align-items: center;
  }
  
  .friend-link {
    padding: 8px 16px;
    font-size: 12px;
  }
  
  .footer-info p {
    font-size: 13px;
  }
  
  .footer-info p:first-child {
    font-size: 16px;
  }
  
  .social-link {
    padding: 10px 16px;
    font-size: 12px;
  }
  
  .social-links {
    gap: 12px;
    flex-wrap: wrap;
  }
  
  .icp-info a {
    font-size: 11px;
    padding: 4px 8px;
  }
  
  .contact-info {
    font-size: 12px;
  }
}

/* 主题变体 - 浅色毛玻璃主题 */
.light-theme .footer {
  background: linear-gradient(135deg, 
    rgba(248, 249, 250, 0.95) 0%, 
    rgba(233, 236, 239, 0.95) 50%, 
    rgba(206, 212, 218, 0.95) 100%);
  color: #212529;
  border-top-color: rgba(0, 0, 0, 0.1);
}

.light-theme .footer::before {
  background: 
    radial-gradient(circle at 15% 85%, rgba(13, 110, 253, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 85% 15%, rgba(220, 53, 69, 0.06) 0%, transparent 60%),
    radial-gradient(circle at 50% 50%, rgba(25, 135, 84, 0.04) 0%, transparent 70%);
}

.light-theme .footer-section h4 {
  color: #212529;
  text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8);
}

.light-theme .footer-section h4::before {
  background: linear-gradient(45deg, 
    rgba(0, 0, 0, 0.05) 0%, 
    rgba(0, 0, 0, 0.02) 50%, 
    rgba(0, 0, 0, 0.05) 100%);
}

.light-theme .friend-link {
  color: #495057;
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.08);
}

.light-theme .friend-link:hover {
  color: #212529;
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.15);
}

.light-theme .footer-bottom {
  border-top-color: rgba(0, 0, 0, 0.1);
}

.light-theme .footer-info p {
  color: #6c757d;
}

.light-theme .footer-info p:first-child {
  color: #212529;
}

.light-theme .contact-info a {
  color: #495057;
}

.light-theme .contact-info a:hover {
  color: #212529;
  background: rgba(0, 0, 0, 0.05);
}

.light-theme .icp-info a {
  color: #6c757d;
  background: rgba(0, 0, 0, 0.02);
  border-color: rgba(0, 0, 0, 0.05);
}

.light-theme .icp-info a:hover {
  color: #212529;
  background: rgba(0, 0, 0, 0.05);
  border-color: rgba(0, 0, 0, 0.1);
}

.light-theme .social-link {
  color: #495057;
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.08);
}

.light-theme .social-link:hover {
  color: #212529;
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.15);
}

.light-theme .separator {
  color: rgba(0, 0, 0, 0.3);
}

/* 深色毛玻璃主题 */
.dark-theme .footer {
  background: linear-gradient(135deg, 
    rgba(0, 0, 0, 0.95) 0%, 
    rgba(26, 26, 26, 0.95) 50%, 
    rgba(52, 52, 52, 0.95) 100%);
}

.dark-theme .footer-bottom {
  border-top-color: rgba(255, 255, 255, 0.1);
}

/* 无障碍访问增强 */
.footer a:focus {
  outline: 3px solid rgba(100, 181, 246, 0.8);
  outline-offset: 2px;
  border-radius: 6px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.footer a:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.footer-content {
  animation: fadeInUp 1s ease-out;
}

.footer-bottom .footer-info {
  animation: slideInLeft 1s ease-out 0.3s both;
}

.footer-bottom .social-links {
  animation: slideInRight 1s ease-out 0.5s both;
}

/* 打印样式 */
@media print {
  .footer {
    background: none !important;
    color: #000 !important;
    padding: 20px 0;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
  
  .footer::before {
    display: none;
  }
  
  .footer a {
    color: #000 !important;
    text-decoration: underline;
    background: none !important;
    border: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
  
  .footer-bottom {
    border-top: 1px solid #000;
  }
  
  .friend-link,
  .social-link {
    background: none !important;
    border: 1px solid #000 !important;
    padding: 2px 6px !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  .footer {
    background: #000000;
    color: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  
  .footer::before {
    display: none;
  }
  
  .friend-link,
  .social-link {
    background: #ffffff;
    color: #000000;
    border: 2px solid #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  
  .friend-link:hover,
  .social-link:hover {
    background: #000000;
    color: #ffffff;
  }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
  .footer *,
  .footer *::before,
  .footer *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .footer::before {
    animation: none !important;
  }
}