#bottomImage {
    position: fixed;
    bottom: 120px;
    right: 30px;
    z-index: 1000;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-image: url('/uploads/allimg/20241101/GSBET娛樂城首頁logo.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: transform 0.3s ease;
}

#bottomImage:hover {
    transform: scale(1.1);
}

#scrollToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none; /* 預設隱藏 */
    justify-content: center;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    pointer-events: auto;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#scrollToTop .arrow-up {
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 12px solid #fc0303;
    pointer-events: none;
}

/* RWD 適配 */
@media (max-width: 768px) {
    #bottomImage {
        bottom: 100px;
        right: 20px;
        width: 60px;
        height: 60px;
    }

    #scrollToTop {
        bottom: 60px;
        right: 20px;
        width: 40px;
        height: 40px;
    }

    #scrollToTop .arrow-up {
        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
        border-bottom: 10px solid #fc0303;
    }
}

@media (max-width: 480px) {
    #bottomImage {
        width: 50px;
        height: 50px;
    }
}