#rsewheel-product-container {
        font-family: sans-serif; /* ページの基本フォントを継承させつつ、予備を指定 */
        line-height: 1.6;
        color: #374151;
    }

    #rsewheel-product-container h2,
    #rsewheel-product-container h3,
    #rsewheel-product-container h4,
    #rsewheel-product-container h5 {
        font-weight: bold;
        margin: 1.5rem 0 0.5rem 0;
    }

    #rsewheel-product-container h2 { font-size: 1.875rem; }
    #rsewheel-product-container h3 { font-size: 1.5rem; }
    #rsewheel-product-container h4 { font-size: 1.25rem; }
    #rsewheel-product-container h5 { font-size: 1.125rem; }

    #rsewheel-product-container p {
        margin-bottom: 1rem;
    }

    #rsewheel-product-container img {
        max-width: 100%;
        height: auto;
        border-radius: 0.5rem;
        display: block;
    }

    .rsewheel-product-section {
        margin-top: 3rem;
    }

    /* バナー共通スタイル */
    .rsewheel-product-banner {
        position: relative;
        color: white;
        border-radius: 0.5rem;
        overflow: hidden;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .rsewheel-product-banner .rsewheel-product-banner-overlay {
        position: absolute;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.35);
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        align-items: center;
        text-align: center;
        padding: 2rem;
    }
    
    .rsewheel-product-banner .rsewheel-product-banner-overlay h2,
    .rsewheel-product-banner .rsewheel-product-banner-overlay p {
        text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
    }
    
    .rsewheel-product-banner .rsewheel-product-banner-overlay h2 {
       font-size: 2rem;
    }
    
    /* 各色バナー */
    .rsewheel-product-banner-red { background-color: #dc2626; }
    .rsewheel-product-banner-blue { background-color: #1e3a8a; }
    .rsewheel-product-banner-yellow { background-color: #f59e0b; }
    .rsewheel-product-banner-gray { background-color: #4b5563; padding: 2rem; }

    .rsewheel-product-intro-text {
        text-align: center;
        background-color: #f9fafb;
        color: #374151;
        padding: 1.5rem;
        margin-top: 1rem;
        border-radius: 0.5rem;
    }

    /* スペックセクション */
    .rsewheel-product-specs {
        margin-top: 3rem;
        padding: 1.5rem;
        border: 1px solid #e5e7eb;
        border-radius: 0.5rem;
    }
    .rsewheel-product-specs .rsewheel-product-specs-title {
        font-size: 1.5rem;
        font-weight: 300;
        color: #6b7280;
        border-bottom: 1px solid #e5e7eb;
        padding-bottom: 0.5rem;
        margin-bottom: 1.5rem;
        margin-top: 0;
    }
    .rsewheel-product-specs-grid {
        margin-top: 2rem;
        display: grid;
        gap: 1.5rem;
    }
    .rsewheel-product-specs-item .rsewheel-product-spec-term {
        font-weight: bold;
        font-size: 1.125rem;
        color: #1f2937;
    }
    .rsewheel-product-specs-item .rsewheel-product-spec-desc {
        background-color: #f3f4f6;
        padding: 1rem;
        margin-top: 0.25rem;
        border-radius: 0.375rem;
        color: #374151;
    }
     .rsewheel-product-spec-desc .rsewheel-product-note {
        display: block;
        font-size: 0.875rem;
        margin-top: 0.25rem;
        color: #6b7280;
    }

    /* キャップ画像 */
    .rsewheel-product-cap-grid {
        margin-top: 2rem;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    /* フローフォーミング */
    .rsewheel-product-flowform-layout {
        display: flex;
        flex-direction: column;
    }

    /* VIAテスト */
    .rsewheel-product-viatest-layout {
        display: flex;
        flex-direction: column;
        color: white;
    }
    .rsewheel-product-viatest-image {
        display: none; /* スマホでは非表示 */
    }
    .rsewheel-product-viatest-details {
        flex-grow: 1;
        text-align: center;
    }
    .rsewheel-product-viatest-logo {
        margin: 1rem auto;
        height: 3rem;
    }
    .rsewheel-product-viatest-grid {
        margin-top: 1.5rem;
        display: grid;
        grid-template-columns: repeat(1, 1fr);
        gap: 1.5rem;
        text-align: center;
    }
    .rsewheel-product-viatest-grid img {
        max-width: 250px !important; /* 画像サイズを調整し、スタイルを優先 */
        margin: 0 auto 1rem;
    }
    
    /* ========== 文字色の上書き防止 ========== */
    #rsewheel-product-container .rsewheel-product-banner-overlay > *,
    #rsewheel-product-container .rsewheel-product-banner-blue h4,
    #rsewheel-product-container .rsewheel-product-banner-blue p {
        color: white !important;
    }

    #rsewheel-product-container .rsewheel-product-banner-gray,
    #rsewheel-product-container .rsewheel-product-banner-gray p,
    #rsewheel-product-container .rsewheel-product-banner-gray h5 {
        color: white !important;
    }
    
    #rsewheel-product-container .rsewheel-product-viatest-grid p {
        color: #d1d5db !important;
    }
    /* ==================================== */

    /* メディアクエリ for PC */
    @media (min-width: 768px) {
        .rsewheel-product-cap-grid {
            grid-template-columns: repeat(4, 1fr);
        }
        .rsewheel-product-specs-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .rsewheel-product-flowform-layout {
            display: flex;
            flex-direction: row;
            align-items: center;
            gap: 2rem;
        }
        .rsewheel-product-flowform-main-image {
             flex: 1;
        }
        .rsewheel-product-flowform-details {
            flex: 1;
        }
        
        .rsewheel-product-viatest-layout {
            display: flex;
            flex-direction: row;
            gap: 2rem;
            align-items: center;
        }
        .rsewheel-product-viatest-image {
            display: block; /* PCで再表示 */
            width: 240px; /* 画像のコンテナ幅を固定 */
            flex-shrink: 0; /* コンテナが縮まないようにする */
            margin-bottom: 0;
        }
        .rsewheel-product-viatest-details {
            flex: 1; /* 残りのスペースをすべて使用 */
        }
        .rsewheel-product-viatest-grid {
            grid-template-columns: repeat(3, 1fr);
        }
         .rsewheel-product-banner .rsewheel-product-banner-overlay h2 {
           font-size: 2.5rem;
        }
    }