#popup-container {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
}

#popup {
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    width: 20%;
    min-width: 150px;
    min-width: 200px;
    background: white;
    padding: 20px;
}

.hidden {
    display: none;
}

#close-popup {
    position: absolute;
    top: 10px;
    right: 10px;
}

#dropdown {
    margin: auto;
    width: 80%; /* 让<select>元素宽度占满容器 */
    margin-bottom: 10px; /* 添加一些底部间距 */
}

#buttons {
    margin: auto;
    width: 50%;
    display: flex;
    flex-direction: column; /* 设置按钮垂直排列 */
}

#buttons button {
    margin: 10px 0; /* 添加按钮之间的垂直间距 */
}