Japanese Web Banner Grid Layout

{
  "type": "[2x2 grid of Japanese banner advertisements]",
  "panels": [
    {
      "position": "top-left",
      "theme": "skincare cosmetics",
      "subject": "close-up portrait of a serene woman with closed eyes gently touching her glowing face",
      "product": "white serum bottle with silver cap",
      "brand": "mira",
      "main_copy": "[わたしの肌に、ごほうびを。]",
      "sub_copy": "うるおい満ちる、透明感のある素肌へ",
      "badges": {
        "count": 3,
        "labels": [
          "高保湿",
          "くすみケア",
          "敏感肌対応"
        ]
      },
      "footer_box": "ミラ モイスチャーセラム 50mL 6,380円(税込)"
    },
    {
      "position": "top-right",
      "theme": "travel agency",
      "subject": "scenic landscape of Lake Bled featuring an island church surrounded by turquoise water, mountains, and blue sky",
      "main_copy": "[まだ見ぬ景色に、会いに行こう。]",
      "sub_copy": "心が動く旅を、あなたのそばに。",
      "bottom_banner": {
        "text": "未来の自分に、きっと残る。特別な体験を。",
        "footer_elements": {
          "count": 3,
          "items": [
            "海外・国内ツアー多数",
            "今だけの限定プランも！",
            "詳しくはこちら -> (yellow button)"
          ]
        }
      }
    },
    {
      "position": "bottom-left",
      "theme": "gourmet food delivery",
      "subject": "sizzling, juicy hamburger steak split open on a black cast-iron skillet, steaming, garnished with glazed carrots and broccoli",
      "main_copy": "[じゅわっと、肉のうまみ。]",
      "sub_copy": "素材にこだわった、本格派。",
      "badge": "国産牛100%使用 (with cow icon)",
      "bottom_banner": {
        "thumbnail": "box of 4 packaged hamburger patties",
        "text": "ごちそうハンバーグ (4個入) 冷凍でお届けします",
        "button": "ご購入はこちら (brown button with cart icon)"
      }
    },
    {
      "position": "bottom-right",
      "theme": "finance and investment app",
      "subject": "modern smartphone displaying an upward-trending financial line graph and a balance of ¥1,234,567",
      "brand": "treee (with green tree logo)",
      "main_copy": "[はじめよう、わたしの資産づくり。]",
      "sub_copy": "少額から、未来は変えられる。",
      "features": {
        "count": 3,
        "icons": [
          "pie chart with clock",
          "magnet pulling coins",
          "stack of gold coins"
        ],
        "labels": [
          "100円から投資ができる",
          "シンプルで使いやすい",
          "NISAにも対応"
        ]
      },
      "badge": "ダウンロード無料 (green circular badge)",
      "footer": {
        "count": 4,
        "elements": [
          "今すぐダウンロード",
          "App Store badge",
          "Google Play badge",
          "QR code"
        ]
      }
    }
  ]
}