/* --- 基本設定 & リセット --- */
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif; color: #333; background-color: #fff; line-height: 1.6; }
        img { max-width: 100%; height: auto; vertical-align: middle; }
        a { color: inherit; text-decoration: none; }

        /* --- レイアウト構造 --- */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        section { padding: 60px 0; }
        .section-title { text-align: center; font-size: 24px; margin-bottom: 40px; position: relative; padding-bottom: 10px; }
        .section-title::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 40px; height: 2px; background-color: #333; }

        /* --- ヘッダー --- */
        header { border-bottom: 1px solid #eee; padding: 20px 0; position: sticky; top: 0; background: rgba(255,255,255,0.95); z-index: 100; }
        .header-logo { font-size: 20px; font-weight: bold; letter-spacing: 0.05em; }

        /* --- メインビジュアル --- */
        .hero { background-color: #f9f9f9; text-align: center; padding: 80px 20px; }
        .hero-title { font-size: 32px; font-weight: normal; margin-bottom: 15px; letter-spacing: 0.03em; }
        .hero-lead { font-size: 16px; color: #666; max-width: 600px; margin: 0 auto; }

        /* --- 商品リスト（グリッド） --- */
        .product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 30px; }
        .product-item { cursor: pointer; background: #fff; transition: transform 0.2s, box-shadow 0.2s; border: 1px solid #eee; padding: 10px; }
        .product-item:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.05); }
        .product-img-wrapper { width: 100%; aspect-ratio: 1 / 1; overflow: hidden; background: #f5f5f5; margin-bottom: 15px; }
        .product-img-wrapper img { width: 100%; height: 100%; object-fit: cover; }
        .product-name { font-size: 15px; font-weight: bold; margin-bottom: 5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .product-price { font-size: 16px; color: #d9534f; font-weight: bold; margin-bottom: 5px; }
        .product-stock { font-size: 12px; display: inline-block; padding: 2px 8px; border-radius: 3px; font-weight: bold; }
        /* 在庫ステータス用バッジ */
        .stock-in { background: #e6f4ea; color: #137333; }
        .stock-few { background: #fef7e0; color: #b06000; }
        .stock-out { background: #fce8e6; color: #c5221f; }

        /* --- 購入方法（ステップ） --- */
        .flow { background-color: #f9f9f9; }
        .flow-steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }
        .flow-step { background: #fff; padding: 30px; border-radius: 4px; text-align: center; border: 1px solid #eee; }
        .step-num { font-size: 24px; font-weight: bold; color: #aaa; margin-bottom: 10px; display: block; }
        .step-title { font-size: 16px; font-weight: bold; margin-bottom: 10px; }
        .step-text { font-size: 14px; color: #666; text-align: left; }

        /* --- アクセス情報 --- */
        .access-info { max-width: 600px; margin: 0 auto; }
        .access-table { width: 100%; border-collapse: collapse; margin-bottom: 20px; font-size: 15px; }
        .access-table th, .access-table td { padding: 12px; border-bottom: 1px solid #eee; text-align: left; }
        .access-table th { width: 30%; color: #666; font-weight: normal; }

        /* --- フッター --- */
        footer { background: #333; color: #fff; text-align: center; padding: 20px 0; font-size: 12px; letter-spacing: 0.1em; }

        /* --- 詳細画面（モーダルポップアップ） --- */
        .modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); z-index: 1000; justify-content: center; align-items: center; padding: 20px; }
        .modal.active { display: flex; }
        .modal-content { background: #fff; max-width: 700px; width: 100%; max-height: 90vh; overflow-y: auto; position: relative; padding: 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 30px; border-radius: 4px; animation: fadeIn 0.3s ease; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
        .modal-close { position: absolute; top: 15px; right: 20px; font-size: 30px; cursor: pointer; color: #999; }
        .modal-left img { width: 100%; aspect-ratio: 1/1; object-fit: cover; background: #f5f5f5; }
        .modal-right { display: flex; flex-direction: column; justify-content: center; }
        .modal-name { font-size: 22px; font-weight: bold; margin-bottom: 10px; }
        .modal-price { font-size: 20px; color: #d9534f; font-weight: bold; margin-bottom: 15px; }
        .modal-stock { align-self: flex-start; margin-bottom: 20px; }
        .modal-detail { font-size: 14px; color: #555; white-space: pre-wrap; line-height: 1.7; border-top: 1px solid #eee; padding-top: 15px; }

        /* スマホ用レスポンシブ */
        @media (max-width: 768px) {
            .modal-content { grid-template-columns: 1fr; padding: 25px; }
            .hero-title { font-size: 24px; }
            .product-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 15px; }
            .product-name { font-size: 14px; }
        }
/* --- ヘッダー --- */
        header { border-bottom: 1px solid #eee; padding: 15px 0; position: sticky; top: 0; background: rgba(255,255,255,0.95); z-index: 100; }
        
        /* ロゴ周りの調整 */
        .header-logo { display: flex; align-items: center; }
        .header-logo img { 
            max-height: 50px; /* ロゴの高さをお好みに合わせて調整してください */
            width: auto;      /* 横幅は自動計算させて比率を維持します */
            display: block;
        }