/* ========================================
   Floating Contact Buttons Plugin
   ======================================== */
.floating-contact {
    position: fixed;
    right: 20px;
    bottom: 30px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.floating-contact-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    max-height: 500px;
    opacity: 1;
}

.floating-contact-buttons.collapsed {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
    margin-bottom: -8px;
}

/* ---- 所有浮動按鈕的基底樣式 ---- */
.floating-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.25s ease,
                filter 0.25s ease;
    padding: 0;
    background: transparent;
    text-decoration: none;
    position: relative;

    /* 陰影特效：確保按鈕在任何背景色下都清晰可見 */
    filter: drop-shadow(0px 3px 6px rgba(0, 0, 0, 0.25))
            drop-shadow(0px 1px 3px rgba(0, 0, 0, 0.12));
}

/* Hover 效果：放大 + 陰影加深 */
.floating-btn:hover {
    transform: scale(1.12) translateY(-2px);
    filter: drop-shadow(0px 6px 12px rgba(0, 0, 0, 0.3))
            drop-shadow(0px 2px 5px rgba(0, 0, 0, 0.15));
}

/* Active / 按下效果 */
.floating-btn:active {
    transform: scale(0.95);
    filter: drop-shadow(0px 2px 4px rgba(0, 0, 0, 0.2))
            drop-shadow(0px 1px 2px rgba(0, 0, 0, 0.1));
}

/* ---- 聯絡按鈕共用尺寸 ---- */
.floating-btn-line,
.floating-btn-fb,
.floating-btn-phone,
.floating-btn-service {
    width: 48px;
    height: 48px;
    background: transparent;
    border-radius: 50%;
    overflow: visible;
}

/* ---- 圖示圖片 ---- */
.floating-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    border-radius: 50%;
}

/* ---- 回到頂部按鈕 ---- */
.floating-btn-top {
    width: 48px;
    height: 48px;
    padding: 0;
    background: transparent;
    border-radius: 50%;
}

/* ---- 脈搏提示動畫 (客服按鈕) ---- */
.floating-btn-service {
    animation: lc-pulse-ring 2.5s cubic-bezier(0.42, 0, 0.58, 1) infinite;
}

@keyframes lc-pulse-ring {
    0% {
        box-shadow: 0 0 0 0 rgba(2, 102, 208, 0.4);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(2, 102, 208, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(2, 102, 208, 0);
    }
}

/* ---- 子按鈕展開動畫 ---- */
.floating-contact-buttons .floating-btn {
    opacity: 1;
    transform: translateY(0);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.25s ease,
                filter 0.25s ease;
}

.floating-contact-buttons.collapsed .floating-btn {
    opacity: 0;
    transform: translateY(10px) scale(0.8);
}

/* 每個子按鈕有不同的延遲，製造階梯式展開效果 */
.floating-contact-buttons .floating-btn:nth-child(1) { transition-delay: 0.08s; }
.floating-contact-buttons .floating-btn:nth-child(2) { transition-delay: 0.04s; }
.floating-contact-buttons .floating-btn:nth-child(3) { transition-delay: 0s; }

.floating-contact-buttons.collapsed .floating-btn:nth-child(1) { transition-delay: 0s; }
.floating-contact-buttons.collapsed .floating-btn:nth-child(2) { transition-delay: 0.04s; }
.floating-contact-buttons.collapsed .floating-btn:nth-child(3) { transition-delay: 0.08s; }

/* ---- 響應式 ---- */
@media (max-width: 768px) {
    .floating-contact {
        right: 12px;
        bottom: 20px;
        gap: 8px;
    }

    .floating-btn-line,
    .floating-btn-fb,
    .floating-btn-phone,
    .floating-btn-service,
    .floating-btn-top {
        width: 40px;
        height: 40px;
    }

    /* 手機上稍微縮小陰影以保持比例 */
    .floating-btn {
        filter: drop-shadow(0px 2px 5px rgba(0, 0, 0, 0.22))
                drop-shadow(0px 1px 2px rgba(0, 0, 0, 0.1));
    }

    .floating-btn:hover {
        filter: drop-shadow(0px 4px 8px rgba(0, 0, 0, 0.28))
                drop-shadow(0px 2px 4px rgba(0, 0, 0, 0.12));
    }
}