body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  background-color: #f4f4f9;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #0056b3;
}

#result {
  margin-top: 20px;
  font-size: 18px;
}

.logo {
  position: absolute;
  top: 10px;
  left: 10px;
  width: 50px;
  height: auto;
  z-index: 1;
}

#welcomeMessage {
  margin-top: 10px;
  font-size: 16px;
  color: #333;
}

.main-title {
  font-family: 'Pacifico', cursive;
  font-size: 2.5rem;
  color: #FF5733;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: 20px;
  text-align: center;
}

#wechatQrCode {
  margin-top: 20px;
  width: 200px;
  height: 200px;
  object-fit: contain;
  display: none;
}
video, canvas {
  display: block;
  width: 100%;
  height: auto;
  max-width: 640px;
  margin: 0 auto;
  background-color: #000; /* 添加背景色，防止黑色背景问题 */
}

@media (max-width: 768px) {
  video, canvas {
    max-width: 100%;
  }
}