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

body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: #000;
  font-family: 'Arial', sans-serif;
}

.game-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: #000;
  overflow: hidden;
}


  

/* 主画布 - 显示特征点 */
.main-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  background: transparent;
  pointer-events: none; /* 不拦截鼠标事件 */
}

/* 漂浮点画布 */
.particle-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  background: transparent;
  pointer-events: none; /* 不拦截鼠标事件 */
}

/* 控制按钮 */
.controls {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  text-align: center;
}

.control-button {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  padding: 12px 30px;
  font-size: 16px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.control-button:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.control-button:active {
  transform: translateY(0);
}

.loading-text {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  margin-top: 10px;
  font-weight: 300;
}

/* 摄像头预览 */
.camera-preview {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 30vw; /* 屏幕宽度的3/10 */
  height: auto; /* 自动高度，保持视频比例 */
  max-width: 300px; /* 最大宽度限制 */
  max-height: 25vh; /* 最大高度限制 */
  aspect-ratio: 16/9; /* 默认16:9比例，会被JavaScript覆盖 */
  background: rgba(0, 0, 0, 0.8);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 8px;
  overflow: hidden;
  z-index: 50;
  backdrop-filter: blur(10px);
  display: none; /* 默认隐藏，启动摄像头时显示 */
}

.camera-preview video,
.camera-preview .preview-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.camera-preview .preview-canvas {
  background: transparent;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .title-text {
    font-size: 5vw;
    letter-spacing: 0.15em;
  }

  .control-button {
    padding: 10px 20px;
    font-size: 14px;
  }

  .camera-preview {
    width: 40vw; /* 在小屏幕上更大一些 */
    max-width: 250px; /* 移动端最大宽度 */
    max-height: 35vh;
  }
}