.okp-price-calculator {
  max-width: 500px;
  padding: 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-family: Arial, sans-serif;
}
.okp-price-calculator h2 {
  margin-top: 0;
}
.okp-price-calculator label {
  display: block;
  margin-top: 12px;
  margin-bottom: 4px;
}
.okp-size-inputs input {
  width: 80px;
  padding: 4px;
  margin: 4px;
}
.okp-price-calculator button {
  margin-top: 12px;
  padding: 8px 16px;
  cursor: pointer;
}
.okp-result {
  margin-top: 16px;
  padding: 12px;
  border-radius: 6px;
  background: #f7f7f7;
  white-space: pre-line; /* 让 \n 换行显示 */
}