/* 全站 WhatsApp 浮動查詢按鈕 */
.whatsapp-fab {
    position: fixed;
    bottom: 5rem;
    right: 0.625rem;
    z-index: 99;
}

.whatsapp-fab a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4.5rem;
    height: 4.5rem;
    border-radius: var(--radius-pill);
    background: var(--color-whatsapp);
    box-shadow: var(--shadow-md);
    transition: background var(--transition), transform var(--transition);
}

.whatsapp-fab a:hover {
    background: var(--color-whatsapp-dark);
    transform: scale(1.05);
}

.whatsapp-fab__icon {
    width: 2.5rem;
    height: 2.5rem;
    display: block;
}

@media (max-width: 767px) {
    .whatsapp-fab a {
        width: 3.5rem;
        height: 3.5rem;
    }

    .whatsapp-fab__icon {
        width: 2rem;
        height: 2rem;
    }
}