{"slug":"mixednavigation","contract":{"variants":["一级选中 + 二级选中","一级选中 + 二级默认","未选中的一级（二级隐藏）"],"dims":[{"name":"level1State","values":["active","default"]},{"name":"level2State","values":["active","default","hidden"]}],"unknowns":["侧边栏的默认宽度","状态记忆的持久化范围"],"anatomy":{"top":"顶部一级菜单","side":"侧边栏二级菜单","sync":"顶部菜单切换时侧边栏内容变化","memory":"菜单状态记忆"},"doNot":["三级及以上菜单的呈现","顶部菜单溢出处理"],"usage":["顶部一级菜单 + 侧边栏二级菜单","顶部菜单切换时侧边栏内容变化","支持权限过滤","菜单状态记忆","适用于复杂后台"],"structure":{"layout":"顶部一级 + 侧边二级"}},"specLines":["- 顶部一级菜单 + 侧边栏二级菜单","- 顶部菜单切换时侧边栏内容变化","- 支持权限过滤","- 菜单状态记忆","- 适用于复杂后台"]}