/* 增加背景色和字体样式 */
body {
    background-color: #f8f9fa;
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
}

footer {
    background-color: #f8f9fa;
    align-items: center;
    justify-content: center;
}

    footer .container {
        display: flex;
        flex-direction: column; /* 强制竖直排列子元素 */
        align-items: center; /* 子元素居中 */
    }

/* 新增样式以适应小屏幕 */

.file-link {
    text-decoration: none;
    color: black; /* 明确指定链接颜色为黑色 */
}

.list-group-item {
    word-wrap: break-word;
}

.btn-outline-secondary:hover {
    background-color: #e0e0e0;
    border-color: #a0a0a0;
    color: #000;
}
.navbar-nav .nav-link {
    white-space: nowrap;
}