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

body {
  font-family: 'Arial', sans-serif;
  background-color: #f4f7fa;
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.container {
  background: #fff;
  border-radius: 10px;
  padding: 20px;
  width: 100%;
  max-width: 500px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 24px;
  color: #333;
}

.form-group {
  margin-bottom: 15px;
}

label {
  font-size: 14px;
  color: #555;
  margin-bottom: 5px;
  display: block;
}

input[type="text"], input[type="file"] {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 14px;
}

button.upload-btn {
  background-color: #4CAF50;
  color: #fff;
  padding: 12px 20px;
  border: none;
  border-radius: 5px;
  width: 100%;
  font-size: 16px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button.upload-btn:hover {
  background-color: #45a049;
}

#message {
  margin-top: 15px;
  text-align: center;
  color: #333;
}

.centered-link {
  text-align: center;
  margin-top: 20px;
}

.hint-text {
  text-align: center;
  font-size: 10px;
  margin-top: 10px;
}

.github-icon {
  width: 20px;
  margin-right: 5px;
  vertical-align: middle;
}

.centered-link a {
  text-decoration: none;
  color: #007bff;
  font-size: 14px;
  padding-right: 10px;
}

.centered-link a:hover {
  text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 600px) {
  .container {
    padding: 15px;
  }

  h1 {
    font-size: 20px;
  }

  button.upload-btn {
    padding: 10px;
    font-size: 14px;
  }

  .form-group input {
    padding: 8px;
    font-size: 13px;
  }
}