body {
  font-family: 'SimSun', '宋体', serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f5f5f5;
}
.container {
  background-color: white;
  padding: 20px;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.comparison-container {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}
.text-box {
  flex: 1;
  border: 1px solid #ddd;
  padding: 15px;
  min-height: 200px;
  background-color: #fff;
}
.text-title {
  font-weight: bold;
  margin-bottom: 10px;
  font-size: 16px;
}
.highlight-red {
  background-color: #ffcccc;
  padding: 2px 0;
}
.highlight-green {
  background-color: #ccffcc;
  padding: 2px 0;
}
.controls {
  margin-bottom: 20px;
}
textarea {
  width: 100%;
  height: 100px;
  margin-bottom: 10px;
  padding: 10px;
  border: 1px solid #ddd;
  font-family: inherit;
}
button {
  padding: 8px 15px;
  background-color: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
button:hover {
  background-color: #45a049;
}