body {
  font-family: Arial, sans-serif;
  margin: 20px;
  padding: 0;
}
form {
  max-width: 400px;
  margin: 0 auto;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 5px;
  box-sizing: border-box; /* 确保 padding 和 border 包含在宽度内 */
}
label {
  display: block;
  margin: 10px 0 5px;
}
input, button {
  width: 100%; /* 保证输入框宽度为外框的100% */
  padding: 8px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 3px;
  box-sizing: border-box; /* 包括 padding 和 border 在宽度内 */
}
button {
  background-color: #007BFF;
  color: white;
  cursor: pointer;
}
button:hover {
  background-color: #0056b3;
}

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

.server-radio-group {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  width: 100%;
}

.server-radio-group label {
  display: flex;
  align-items: baseline;
  white-space: nowrap;
}

.server-radio-group input[type="radio"] {
  margin-left: 6px;
}