/* フォントクラス定義 */
    .brand-serif { font-family: 'Hiragino Mincho ProN', 'Yu Mincho', YuMincho, Georgia, serif; }
    .font-sans { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif; }
    /* モバイルメニューアニメーション */
    .fade-in { transition: opacity 0.3s ease, height 0.3s ease; }
    .mobile-menu { height: 0; opacity: 0; overflow: hidden; }
    .mobile-menu.active { height: auto; opacity: 1; }
    /* 基本的な可読性設定 */
    body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif; line-height: 1.8; color: #2f2e2c; }
    .terms-section { max-width: 900px; margin: 0 auto; }
    .terms-section p { margin-bottom: 1.5rem; }