/* 右下角浮動聯絡按鈕 */
.floating-contact {
    position: fixed;
    right: 20px;

    /* 避開網站原有的回到頂端按鈕 */
    bottom: 90px;

    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
}

.floating-contact__item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    text-decoration: none;
    background-color: transparent;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.22);
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

.floating-contact__item img {
    display: block;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: contain;
}

.floating-contact__item:hover,
.floating-contact__item:focus-visible {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 7px 20px rgba(0, 0, 0, 0.3);
}

/* 滑鼠移入時顯示文字 */
.floating-contact__item span {
    position: absolute;
    top: 50%;
    right: calc(100% + 12px);
    transform: translateY(-50%) translateX(5px);
    min-width: max-content;
    padding: 7px 12px;
    border-radius: 5px;
    color: #ffffff;
    background-color: rgba(40, 40, 40, 0.92);
    font-size: 14px;
    line-height: 1.4;
    letter-spacing: 0.5px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
        opacity 0.2s ease,
        transform 0.2s ease,
        visibility 0.2s ease;
}

.floating-contact__item span::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 100%;
    transform: translateY(-50%);
    border-width: 6px 0 6px 7px;
    border-style: solid;
    border-color: transparent transparent transparent rgba(40, 40, 40, 0.92);
}

.floating-contact__item:hover span,
.floating-contact__item:focus-visible span {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
}

/* 鍵盤操作時顯示焦點 */
.floating-contact__item:focus-visible {
    outline: 3px solid #ffffff;
    outline-offset: 3px;
}

/* 手機版 */
@media screen and (max-width: 767px) {
    .floating-contact {
        right: 12px;
        bottom: calc(72px + env(safe-area-inset-bottom));
        gap: 9px;
    }

    .floating-contact__item,
    .floating-contact__item img {
        width: 52px;
        height: 52px;
    }

    /* 手機沒有滑鼠移入，因此隱藏提示文字 */
    .floating-contact__item span {
        display: none;
    }
}

/* 使用者設定減少動畫時停用動態效果 */
@media (prefers-reduced-motion: reduce) {
    .floating-contact__item,
    .floating-contact__item span {
        transition: none;
    }
}