{
  "levelGeneration": {
    "boardSize": {
      "width": 6,
      "height": 9
    },
    "difficulties": [
      {
        "level": 1,
        "name": "简单",
        "elementTypes": 4,
        "maxMoves": 30,
        "targetScore": 700,
        "objectives": [
          {
            "type": "score",
            "target": 700
          }
        ],
        "obstacles": [],
        "specialElementChance": 0.05
      },
      {
        "level": 2,
        "name": "中等",
        "elementTypes": 5,
        "maxMoves": 30,
        "targetScore": 1400,
        "objectives": [
          {
            "type": "score",
            "target": 1400
          },
          {
            "type": "collect",
            "elementId": "red",
            "count": 10
          }
        ],
        "obstacles": ["stone"],
        "specialElementChance": 0.08
      },
      {
        "level": 3,
        "name": "困难",
        "elementTypes": 6,
        "maxMoves": 40,
        "targetScore": 2700,
        "objectives": [
          {
            "type": "score",
            "target": 2700
          },
          {
            "type": "collect",
            "elementId": "blue",
            "count": 15
          },
          {
            "type": "clearObstacles",
            "count": 5
          }
        ],
        "obstacles": ["stone", "ice"],
        "specialElementChance": 0.1
      }
    ],
    "progressionRules": {
      "levelIncrement": 1,
      "difficultyProgression": [
        {"levelRange": [1, 2], "difficulty": 1},
        {"levelRange": [3, 4], "difficulty": 2},
        {"levelRange": [5, 7], "difficulty": 3}
      ],
      "targetScoreIncrease": 50,
      "maxMovesDecrease": 1
    },
    "validationRules": {
      "minMatches": 3,
      "maxMatchesPerMove": 20,
      "ensureSolvable": true,
      "maxGenerationAttempts": 100
    }
  }
}