.light-btn {
    background: rgba(70, 139, 223, 0.1);
    border: 0;
    color: #468bdf;
}

.navbar-nav .ant-btn {
    font-size: 1.3rem;
    padding-top: 10px;
    padding-bottom: 10px;
    height: auto;
}

.contact-icon {
    font-size: 1.5rem;
    border: 2px #BBB solid;
    padding: 14px;
    border-radius: 50%;
}

#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #007bff;
    color: white;
    border: none;
    cursor: pointer;
    display: none; /* 預設隱藏 */
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    transition: opacity 0.3s ease;
}

    #backToTop:hover {
        background-color: #0056b3;
    }