body {
  margin: 0;
  overflow: hidden;
  background-color: #000;
}

canvas {
  display: block;
}

/* 统一按钮样式 */
.marbles-btn, .perform-btn, .video-btn {
  position: absolute;
  top: 20px;
  padding: 10px 20px;
  font-size: 16px;
  z-index: 1;
  cursor: pointer;
  border-radius: 8px; /* 圆角 */
  border: 2px solid #5e3c16; /* 木头边框色 */
  background-color: #8b5a2b; /* 基础木头色 */
  color: #fff;
  font-family: Arial, sans-serif;
  font-weight: bold;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.3);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
  transition: all 0.2s ease;
}

/* 悬停效果 */
.marbles-btn:hover, .perform-btn:hover, .video-btn:hover {
  background-color: #a07850; /* 浅一点的木头色 */
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 点击效果 */
.marbles-btn:active, .perform-btn:active, .video-btn:active {
  transform: translateY(1px);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/*
.marbles-btn {
  left: 20px; 
  width: 120px;
}
*/

.perform-btn {
  left: 20px; 
  width: 120px;
}

.video-btn {
  left: 140px; 
  width: 120px;
}

/* 添加木质纹理效果（可选） */
.marbles-btn::before, .perform-btn::before, .video-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to right,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  border-radius: 6px; /* 比按钮小2px */
  pointer-events: none;
}