* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
  animation: fadeIn 0.5s ease forwards;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.ai-avatar {
  transition: transform 0.3s ease;
}

.ai-avatar:hover {
  transform: scale(1.1);
}

.btn-primary {
  transition: all 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(22, 93, 255, 0.4);
}

.card-hover {
  transition: all 0.3s ease;
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.loading-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #165DFF;
  margin: 0 2px;
}

.loading-dot:nth-child(1) { animation: loading 1.4s infinite ease-in-out both; }
.loading-dot:nth-child(2) { animation: loading 1.4s infinite ease-in-out both 0.2s; }
.loading-dot:nth-child(3) { animation: loading 1.4s infinite ease-in-out both 0.4s; }

@keyframes loading {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}

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

.animate-slide-up {
  animation: slideUp 0.3s ease-out forwards;
}

/* 隐藏视频播放器的原生控制栏 */
video::-webkit-media-controls {
  display: none !important;
}

video::-webkit-media-controls-enclosure {
  display: none !important;
}

video::-webkit-media-controls-panel {
  display: none !important;
}

video::-webkit-media-controls-play-button {
  display: none !important;
}

video::-webkit-media-controls-timeline {
  display: none !important;
}

video::-webkit-media-controls-current-time-display {
  display: none !important;
}

video::-webkit-media-controls-time-remaining-display {
  display: none !important;
}

video::-webkit-media-controls-mute-button {
  display: none !important;
}

video::-webkit-media-controls-volume-slider {
  display: none !important;
}

video::-webkit-media-controls-fullscreen-button {
  display: none !important;
}