/* 固定按鈕容器 */
#fixed-actions {
    position: fixed;
    right: 15px;
    bottom: 80px;
    z-index: 2147483647;

    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 按鈕共用樣式 */
#fixed-actions .fixed-btn {
    display: flex;
    align-items: center;
    justify-content: center;

    width: 50px;
    height: 50px;

    padding: 0;
    border: none;
    border-radius: 50%;

    color: #fff;
    font-size: 13px;
    font-weight: bold;
    text-decoration: none;

    cursor: pointer;
    box-sizing: border-box;

    transition: opacity 0.2s ease;
}

/* TOP */
#fixed-actions .top-btn {
    background: #333;
    font-size: 26px;
}

/* MAIL */
#fixed-actions .mail-btn {
    background: #7390f9;
}

/* DM */
#fixed-actions .dm-btn {
    background: #f97a73;
}

/* 滑鼠移入 */
#fixed-actions .fixed-btn:hover {
    opacity: 0.8;
}

/* 手機版 */
@media screen and (max-width: 768px) {

    #fixed-actions {
        right: 20px;
        bottom: 30px;
        gap: 8px;
    }

    #fixed-actions .fixed-btn {
        width: 40px;
        height: 40px;
        font-size: 12px;
    }

    #fixed-actions .top-btn {
        font-size: 20px;
    }
}