/* 返回上一页按钮 - 左上角 */
.back-button {
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 10px 15px;
    background-color: #343a40;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
}

.back-button:hover {
    background-color: #23272b;
}

/* 回到顶部按钮 - 右下角 */
.scroll-top-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 10px 15px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.9em;
}

.scroll-top-button:hover {
    background-color: #0056b3;
}