请总结以下景观设计的主题，并以scss文件格式输出
user
```scss
// 景观设计主题总结
$theme-name: "自然与现代融合";
$primary-color: #4CAF50; // 绿色代表自然
$secondary-color: #2196F3; // 蓝色代表现代
$tertiary-color: #FFEB3B; // 黄色代表活力

$materials: (
  "natural": "木材, 石材",
  "modern": "玻璃, 钢铁"
);

$features: (
  "water": "喷泉, 小溪",
  "plants": "大型树木, 花卉, 草坪",
  "structures": "凉亭, 现代雕塑"
);

$lighting: (
  "natural": "太阳能灯",
  "modern": "LED灯"
);

$textures: (
  "natural": "粗糙, 光滑",
  "modern": "平滑, 镜面"
);

$patterns: (
  "natural": "有机形状",
  "modern": "几何形状"
);
```
assistant