* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", sans-serif;
        }
        /* body {
            padding: 30px;
            background-color: #f5f7fa;
        } */
        .tree-wrap {
            width: 100%;
            background: #fff;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 2px 12px rgba(0,0,0,0.08);
        }
        .tree-title {
            font-size: 18px;
            margin-bottom: 16px;
            color: #333;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
        }
        /* 树形基础 */
        .tree {
            list-style: none;
        }
        .tree li {
            line-height: 36px;
            position: relative;
        }
        .tree li ul {
            margin-left: 24px;
            display: none; /* 默认折叠 */
        }
        .tree li ul.show {
            display: block;
        }
        /* 文件夹行 */
        .folder-item {
            display: flex;
            align-items: center;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 4px;
        }
        .folder-item:hover {
            background-color: #eef5ff;
        }
        .folder-icon {
            color: #ffb800;
            margin-right: 8px;
            font-size: 16px;
        }
        /* 文件行 */
        .file-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 4px 8px;
            border-radius: 4px;
        }
        .file-item:hover {
            background-color: #f0f7ff;
        }
        .file-left {
            display: flex;
            align-items: center;
        }
        .file-icon {
            color: #409eff;
            margin-right: 8px;
            font-size: 16px;
        }
        /* 下载按钮 */
        .download-btn {
            padding: 4px 10px;
            background: #409eff;
            color: #fff;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 12px;
        }
        .download-btn:hover {
            background: #337ecc;
        }
@media (max-width: 768px){
    .row{
        margin-left: unset;
        margin-right: unset;
    }
}