#chat_window .chat_box .chat_email.icon-tool_email1 {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
#chat_window .chat_box .chat_email.icon-tool_email1::after {
    content: "info@lunsem.com";
    position: absolute;
    right: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%);
    background: #fff;
    padding: 20px 24px;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    white-space: nowrap;
    font-size: 16px;
    color: #333;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 9999;
}
#chat_window .chat_box .chat_email.icon-tool_email1:hover::after {
    opacity: 1;
    visibility: visible;
}