/* 呼吸灯按钮动画 */
    @keyframes pulse-btn {
        0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); transform: scale(1); }
        70% { box-shadow: 0 0 0 15px rgba(255, 255, 255, 0); transform: scale(1.02); }
        100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); transform: scale(1); }
    }
    .breathing-cta-btn {
        animation: pulse-btn 2s infinite;
        transition: all 0.3s ease;
    }
    .breathing-cta-btn:hover {
        transform: scale(1.05);
        background-color: #f9f9f9 !important;
    }