/* 右下角浮窗容器，初始在视口外（底部外面），默认不可见 */
.mt-popup-mask {
    position: fixed;
    right: 20px;
    bottom: -340px; /* 初始完全在屏幕下方，实现升起动画起点 */
    z-index: 9999;
    transition: bottom 0.4s ease-out; /* 向上滑入动画 */
}
/* 动画激活类，加上之后浮窗升起到右下角可视区域 */
.mt-popup-mask.show {
    bottom: 20px;
}
.mt-popup-wrap {
    position: relative;
    width: 400px;
    height: 200px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.25);
    overflow: hidden;
}
/* 关闭按钮 */
.mt-popup-close-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(0,0,0,0.45);
    color: #ffffff;
    border: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    font-size: 14px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding:0;
}
.mt-popup-close-btn:hover {
    background: rgba(0,0,0,0.65);
}