<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch">
      <el-form-item label="菜单名称" prop="menuName">
        <el-input
          v-model="queryParams.menuName"
          placeholder="请输入菜单名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="状态" prop="status">
        <el-select v-model="queryParams.status" placeholder="菜单状态" clearable>
          <el-option
            v-for="dict in dict.type.sys_normal_disable"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['system:menu:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="info"
          plain
          icon="el-icon-sort"
          size="mini"
          @click="toggleExpandAll"
        >展开/折叠</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <KLPTable
      v-if="refreshTable"
      v-loading="loading"
      :data="menuList"
      row-key="menuId"
      :default-expand-all="isExpandAll"
      :tree-props="{children: 'children', hasChildren: 'hasChildren'}"
    >
      <el-table-column prop="menuName" label="菜单名称" :show-overflow-tooltip="true" width="160"></el-table-column>
      <el-table-column prop="icon" label="图标" align="center" width="100">
        <template slot-scope="scope">
          <svg-icon :icon-class="scope.row.icon" />
        </template>
      </el-table-column>
      <el-table-column prop="orderNum" label="排序" width="60"></el-table-column>
      <el-table-column prop="perms" label="权限标识" :show-overflow-tooltip="true"></el-table-column>
      <el-table-column prop="component" label="组件路径" :show-overflow-tooltip="true"></el-table-column>
      <el-table-column prop="status" label="状态" width="80">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.sys_normal_disable" :value="scope.row.status"/>
        </template>
      </el-table-column>
      <el-table-column label="创建时间" align="center" prop="createTime">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createTime) }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['system:menu:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-plus"
            @click="handleAdd(scope.row)"
            v-hasPermi="['system:menu:add']"
          >新增</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-document-copy"
            @click="handleCopyAdd(scope.row)"
            v-hasPermi="['system:menu:add']"
          >复制新增</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['system:menu:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </KLPTable>

    <!-- 添加或修改菜单对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="680px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="100px">
        <el-row>
          <el-col :span="24">
            <el-form-item label="上级菜单" prop="parentId">
              <treeselect
                v-model="form.parentId"
                :options="menuOptions"
                :normalizer="normalizer"
                :show-count="true"
                placeholder="选择上级菜单"
              />
            </el-form-item>
          </el-col>
          <el-col :span="24">
            <el-form-item label="菜单类型" prop="menuType">
              <el-radio-group v-model="form.menuType">
                <el-radio label="M">目录</el-radio>
                <el-radio label="C">菜单</el-radio>
                <el-radio label="F">按钮</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
          <el-col :span="24" v-if="form.menuType != 'F'">
            <el-form-item label="菜单图标" prop="icon">
              <el-popover
                placement="bottom-start"
                width="460"
                trigger="click"
                @show="$refs['iconSelect'].reset()"
              >
                <IconSelect ref="iconSelect" @selected="selected" :active-icon="form.icon" />
                <el-input slot="reference" v-model="form.icon" placeholder="点击选择图标" readonly>
                  <svg-icon
                    v-if="form.icon"
                    slot="prefix"
                    :icon-class="form.icon"
                    style="width: 25px;"
                  />
                  <i v-else slot="prefix" class="el-icon-search el-input__icon" />
                </el-input>
              </el-popover>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="菜单名称" prop="menuName">
              <el-input v-model="form.menuName" placeholder="请输入菜单名称" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="显示排序" prop="orderNum">
              <el-input-number :controls=false controls-position="right" v-model="form.orderNum" :min="0" />
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType != 'F'">
            <el-form-item prop="isFrame">
              <span slot="label">
                <el-tooltip content="选择是外链则路由地址需要以`http(s)://`开头" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                是否外链
              </span>
              <el-radio-group v-model="form.isFrame">
                <el-radio label="0">是</el-radio>
                <el-radio label="1">否</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType != 'F'">
            <el-form-item prop="path">
              <span slot="label">
                <el-tooltip content="访问的路由地址，如：`user`，如外网地址需内链访问则以`http(s)://`开头" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                路由地址
              </span>
              <el-input v-model="form.path" placeholder="请输入路由地址" />
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType == 'C'">
            <el-form-item prop="component">
              <span slot="label">
                <el-tooltip content="访问的组件路径，如：`system/user/index`，默认在`views`目录下" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                组件路径
              </span>
              <el-input v-model="form.component" placeholder="请输入组件路径" />
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType != 'M'">
            <el-form-item prop="perms">
              <el-input v-model="form.perms" placeholder="请输入权限标识" maxlength="100" />
              <span slot="label">
                <el-tooltip content="控制器中定义的权限字符，如：@SaCheckPermission('system:user:list')" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                权限字符
              </span>
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType == 'C'">
            <el-form-item prop="queryParam">
              <el-input v-model="form.queryParam" placeholder="请输入路由参数" maxlength="255" />
              <span slot="label">
                <el-tooltip content='访问路由的默认传递参数，如：`{"id": 1, "name": "ry"}`' placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                路由参数
              </span>
            </el-form-item>
          </el-col>
          <el-col :span="24" v-if="form.menuType != 'F'">
            <el-form-item prop="style">
              <span slot="label">
                <el-tooltip content='菜单样式，JSON格式如：`{"backgroundColor":"#ff0000","color":"#fff","fontWeight":"bold"}`' placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                菜单样式
              </span>
              <div class="style-editor">
                <el-input
                  type="textarea"
                  v-model="form.style"
                  placeholder='请输入菜单样式，JSON格式'
                  :rows="4"
                  maxlength="500"
                  show-word-limit
                  class="style-textarea"
                />
                <div class="style-toolbar">
                  <div class="style-presets">
                    <span class="preset-label">快捷样式：</span>
                    <el-button size="mini" @click="applyStylePreset('danger')">浅红</el-button>
                    <el-button size="mini" @click="applyStylePreset('success')">浅绿</el-button>
                    <el-button size="mini" @click="applyStylePreset('warning')">浅橙</el-button>
                    <el-button size="mini" @click="applyStylePreset('primary')">浅蓝</el-button>
                    <el-button size="mini" @click="applyStylePreset('accent')">浅紫</el-button>
                    <el-button size="mini" @click="applyStylePreset('warm')">暖色</el-button>
                    <el-button size="mini" @click="applyStylePreset('bold')">加粗</el-button>
                    <el-button size="mini" @click="applyStylePreset('italic')">斜体</el-button>
                    <el-button size="mini" @click="applyStylePreset('clear')">清除</el-button>
                  </div>
                  <div class="style-actions">
                    <el-button size="mini" type="success" icon="el-icon-check" @click="validateStyle">校验</el-button>
                    <el-button size="mini" type="info" icon="el-icon-view" @click="showPreview = !showPreview">{{ showPreview ? '隐藏预览' : '预览样式' }}</el-button>
                  </div>
                </div>
                <div v-if="styleError" class="style-error">
                  <i class="el-icon-warning"></i> {{ styleError }}
                </div>
                <div v-if="showPreview && form.style" class="style-preview">
                  <div class="preview-title">菜单预览效果：</div>
                  <div class="preview-container">
                    <div class="preview-menu-item" :style="parsedStyle">
                      <span class="preview-icon">📁</span>
                      <span class="preview-text">{{ form.menuName || '菜单名称' }}</span>
                    </div>
                  </div>
                </div>
              </div>
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType == 'C'">
            <el-form-item prop="isCache">
              <span slot="label">
                <el-tooltip content="选择是则会被`keep-alive`缓存，需要匹配组件的`name`和地址保持一致" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                是否缓存
              </span>
              <el-radio-group v-model="form.isCache">
                <el-radio label="0">缓存</el-radio>
                <el-radio label="1">不缓存</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType != 'F'">
            <el-form-item prop="visible">
              <span slot="label">
                <el-tooltip content="选择隐藏则路由将不会出现在侧边栏，但仍然可以访问" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                显示状态
              </span>
              <el-radio-group v-model="form.visible">
                <el-radio
                  v-for="dict in dict.type.sys_show_hide"
                  :key="dict.value"
                  :label="dict.value"
                >{{dict.label}}</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
          <el-col :span="12" v-if="form.menuType != 'F'">
            <el-form-item prop="status">
              <span slot="label">
                <el-tooltip content="选择停用则路由将不会出现在侧边栏，也不能被访问" placement="top">
                <i class="el-icon-question"></i>
                </el-tooltip>
                菜单状态
              </span>
              <el-radio-group v-model="form.status">
                <el-radio
                  v-for="dict in dict.type.sys_normal_disable"
                  :key="dict.value"
                  :label="dict.value"
                >{{dict.label}}</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listMenu, getMenu, delMenu, addMenu, updateMenu } from "@/api/system/menu";
import Treeselect from "@riophae/vue-treeselect";
import "@riophae/vue-treeselect/dist/vue-treeselect.css";
import IconSelect from "@/components/IconSelect";
import * as XLSX from 'xlsx';

export default {
  name: "Menu",
  dicts: ['sys_show_hide', 'sys_normal_disable'],
  components: { Treeselect, IconSelect },
  computed: {
    parsedStyle() {
      if (!this.form.style) return {};
      try {
        return JSON.parse(this.form.style);
      } catch (e) {
        return {};
      }
    }
  },
  data() {
    return {
      // 遮罩层
      loading: true,
      // 显示搜索条件
      showSearch: true,
      // 菜单表格树数据
      menuList: [],
      // 菜单树选项
      menuOptions: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 是否展开，默认全部折叠
      isExpandAll: false,
      // 重新渲染表格状态
      refreshTable: true,
      // 查询参数
      queryParams: {
        menuName: undefined,
        visible: undefined
      },
      // 菜单样式预览
      showPreview: false,
      // 菜单样式校验错误
      styleError: '',
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        menuName: [
          { required: true, message: "菜单名称不能为空", trigger: "blur" }
        ],
        orderNum: [
          { required: true, message: "菜单顺序不能为空", trigger: "blur" }
        ],
        path: [
          { required: true, message: "路由地址不能为空", trigger: "blur" }
        ]
      }
    };
  },
  created() {
    this.getList();
  },
  methods: {
    // 选择图标
    selected(name) {
      this.form.icon = name;
    },
    /** 应用样式预设 */
    applyStylePreset(type) {
      const presets = {
        danger: { background: 'linear-gradient(135deg, #fff5f5 0%, #ffe0e0 100%)', color: '#c45c5c', borderRadius: '4px', border: '1px solid #ffd4d4' },
        success: { background: 'linear-gradient(135deg, #f0fff4 0%, #dcffe4 100%)', color: '#5c8a6b', borderRadius: '4px', border: '1px solid #c3e6cb' },
        warning: { background: 'linear-gradient(135deg, #fffdf0 0%, #fff3cd 100%)', color: '#b8860b', borderRadius: '4px', border: '1px solid #ffeeba' },
        primary: { background: 'linear-gradient(135deg, #f0f7ff 0%, #d6eaff 100%)', color: '#4a7fb5', borderRadius: '4px', border: '1px solid #b8daff' },
        accent: { background: 'linear-gradient(135deg, #f8f0ff 0%, #e8d5ff 100%)', color: '#8b5cf6', borderRadius: '4px', border: '1px solid #d8b4fe' },
        warm: { background: 'linear-gradient(135deg, #fff8f0 0%, #ffedd5 100%)', color: '#c27832', borderRadius: '4px', border: '1px solid #fed7aa' },
        bold: { fontWeight: '600', color: '#303133' },
        italic: { fontStyle: 'italic', color: '#606266' },
        clear: {}
      };
      if (type === 'clear') {
        this.form.style = '';
        this.styleError = '';
      } else {
        // 合并已有样式
        let currentStyle = {};
        if (this.form.style) {
          try {
            currentStyle = JSON.parse(this.form.style);
          } catch (e) {
            currentStyle = {};
          }
        }
        const mergedStyle = { ...currentStyle, ...presets[type] };
        this.form.style = JSON.stringify(mergedStyle);
        this.validateStyle();
      }
    },
    /** 校验菜单样式JSON格式 */
    validateStyle() {
      this.styleError = '';
      if (!this.form.style) {
        this.$modal.msgSuccess('样式为空，无需校验');
        return;
      }
      try {
        const styleObj = JSON.parse(this.form.style);
        if (typeof styleObj !== 'object' || styleObj === null) {
          this.styleError = '样式必须是JSON对象格式';
          this.$modal.msgError('校验失败：样式必须是JSON对象格式');
          return;
        }
        // 检查是否包含有效的CSS属性
        const validCssProps = [
          'backgroundColor', 'background', 'color', 'fontWeight', 'fontSize', 'fontStyle',
          'borderRadius', 'padding', 'margin', 'border', 'textAlign',
          'textDecoration', 'lineHeight', 'letterSpacing', 'opacity', 'boxShadow'
        ];
        const invalidProps = Object.keys(styleObj).filter(prop => !validCssProps.includes(prop));
        if (invalidProps.length > 0) {
          this.styleError = `可能无效的属性：${invalidProps.join(', ')}`;
        }
        this.$modal.msgSuccess('校验通过：JSON格式正确');
      } catch (e) {
        this.styleError = `JSON格式错误：${e.message}`;
        this.$modal.msgError('校验失败：' + e.message);
      }
    },
    /** 查询菜单列表 */
    getList() {
      this.loading = true;
      listMenu(this.queryParams).then(response => {
        this.menuList = this.handleTree(response.data, "menuId");
        this.loading = false;
      });
    },
    /** 转换菜单数据结构 */
    normalizer(node) {
      if (node.children && !node.children.length) {
        delete node.children;
      }
      return {
        id: node.menuId,
        label: node.menuName,
        children: node.children
      };
    },
    /** 查询菜单下拉树结构 */
    getTreeselect() {
      listMenu().then(response => {
        this.menuOptions = [];
        const menu = { menuId: 0, menuName: '主类目', children: [] };
        menu.children = this.handleTree(response.data, "menuId");
        this.menuOptions.push(menu);
      });
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        menuId: undefined,
        parentId: 0,
        menuName: undefined,
        icon: undefined,
        menuType: "M",
        orderNum: undefined,
        isFrame: "1",
        isCache: "0",
        visible: "0",
        status: "0"
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    /** 新增按钮操作 */
    handleAdd(row) {
      this.reset();
      this.getTreeselect();
      if (row != null && row.menuId) {
        this.form.parentId = row.menuId;
      } else {
        this.form.parentId = 0;
      }
      this.open = true;
      this.title = "添加菜单";
    },
    /** 复制新增按钮操作：将当前菜单信息填入新增弹窗 */
    handleCopyAdd(row) {
      this.reset();
      this.getTreeselect();
      // 直接使用当前行数据拷贝给表单，不拷贝 menuId 确保提交走新增
      const data = { ...row };
      data.menuId = undefined;
      this.form = data;
      this.open = true;
      this.title = "复制新增菜单";
    },
    /** 展开/折叠操作 */
    toggleExpandAll() {
      this.refreshTable = false;
      this.isExpandAll = !this.isExpandAll;
      this.$nextTick(() => {
        this.refreshTable = true;
      });
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      this.getTreeselect();
      getMenu(row.menuId).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改菜单";
      });
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.menuId != undefined) {
            updateMenu(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addMenu(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      this.$modal.confirm('是否确认删除名称为"' + row.menuName + '"的数据项？').then(function() {
        return delMenu(row.menuId);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    },
    /** 导出菜单（仅可见且未停用的菜单，父节点被过滤则子节点一并排除） */
    handleExport() {
      // 菜单类型映射
      const menuTypeMap = { M: '目录', C: '菜单', F: '按钮' };

      // 递归过滤：只保留 visible='0'(显示) && status='0'(正常) 的节点
      const filterTree = (nodes) => {
        return nodes
          .filter(node => node.visible === '0' && node.status === '0')
          .map(node => ({
            ...node,
            children: node.children ? filterTree(node.children) : []
          }));
      };

      // 递归展平为一维数组，缩进体现层级
      const flattenTree = (nodes, level = 0, parentPath = '', result = []) => {
        nodes.forEach(node => {
          const prefix = '\u3000'.repeat(level); // 全角空格缩进
          const ownPath = node.path || '';
          // 计算完整路由地址（仅菜单类型 C 有效）
          let fullPath = '';
          if (node.menuType === 'C') {
            if (node.isFrame === '0') {
              // 外链：完整路由就是自身路径
              fullPath = ownPath;
            } else {
              // 内部路由：父路径 + 自身路径
              const parent = parentPath ? (parentPath.endsWith('/') ? parentPath : parentPath + '/') : '';
              fullPath = '/' + parent + ownPath;
            }
          }
          // 目录(M)的路径拼接祖先路径后作为子节点的父路径
          const currentParentPath = node.menuType === 'M' ? (parentPath ? parentPath + '/' + ownPath : ownPath) : parentPath;

          result.push({
            menuName: prefix + node.menuName,
            menuType: menuTypeMap[node.menuType] || node.menuType,
            path: ownPath,
            fullPath: fullPath,
            icon: node.icon || '',
            orderNum: node.orderNum,
            perms: node.perms || '',
            component: node.component || '',
            status: '正常',
            createTime: node.createTime || ''
          });
          if (node.children && node.children.length > 0) {
            flattenTree(node.children, level + 1, currentParentPath, result);
          }
        });
        return result;
      };

      const filtered = filterTree(this.menuList);
      const flatData = flattenTree(filtered);

      if (flatData.length === 0) {
        this.$modal.msgWarning('没有可导出的菜单数据');
        return;
      }

      // 构建 Excel 数据
      const wsData = [
        ['菜单名称', '菜单类型', '路由地址', '完整路由地址', '图标', '排序', '权限标识', '组件路径', '状态', '创建时间'],
        ...flatData.map(item => [
          item.menuName, item.menuType, item.path,
          item.fullPath, item.icon, item.orderNum,
          item.perms, item.component, item.status,
          item.createTime
        ])
      ];

      const ws = XLSX.utils.aoa_to_sheet(wsData);
      ws['!cols'] = [
        { wch: 30 }, { wch: 10 }, { wch: 22 },
        { wch: 30 }, { wch: 12 }, { wch: 8 },
        { wch: 25 }, { wch: 30 }, { wch: 8 },
        { wch: 20 }
      ];

      const wb = XLSX.utils.book_new();
      XLSX.utils.book_append_sheet(wb, ws, '菜单列表');
      XLSX.writeFile(wb, '菜单列表.xlsx');
    }
  }
};
</script>

<style lang="scss" scoped>
.style-editor {
  width: 100%;
  max-width: 600px;

  .style-textarea {
    margin-bottom: 8px;

    :deep(.el-textarea__inner) {
      font-family: 'Consolas', 'Monaco', monospace;
      font-size: 12px;
      line-height: 1.5;
      padding: 8px;
    }
  }

  .style-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;

    .style-presets {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 4px;

      .preset-label {
        font-size: 12px;
        color: #909399;
        margin-right: 4px;
      }

      .el-button {
        margin-left: 0;
      }
    }

    .style-actions {
      display: flex;
      gap: 4px;
    }
  }

  .style-error {
    color: #F56C6C;
    font-size: 12px;
    margin-bottom: 8px;
    padding: 4px 8px;
    background-color: #FEF0F0;
    border-radius: 4px;
    border: 1px solid #FBC4C4;

    i {
      margin-right: 4px;
    }
  }

  .style-preview {
    border: 1px solid #EBEEF5;
    border-radius: 4px;
    padding: 12px;
    background-color: #FAFAFA;

    .preview-title {
      font-size: 12px;
      color: #909399;
      margin-bottom: 8px;
    }

    .preview-container {
      display: flex;
      justify-content: center;
      padding: 16px;
      background-color: #F5F7FA;
      border-radius: 4px;

      .preview-menu-item {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 16px;
        background-color: #fff;
        border-radius: 4px;
        min-width: 120px;
        justify-content: center;
        transition: all 0.3s ease;

        .preview-icon {
          font-size: 16px;
        }

        .preview-text {
          font-size: 14px;
        }
      }
    }
  }
}
</style>
