手风琴
协调一组可展开面板，可设置同时打开多个。
lr-accordion
import '@aceshooting/lyra-ui/components/lr-accordion.js';示例
import '@aceshooting/lyra-ui/components/lr-accordion.js';
import '@aceshooting/lyra-ui/components/lr-accordion-item.js';
<lr-accordion mode="single">
<lr-accordion-item label="First panel" expanded>Opening one panel closes the others.</lr-accordion-item>
<lr-accordion-item label="Second panel">Set mode to multiple to keep them independent.</lr-accordion-item>
<lr-accordion-item label="Third panel">Slotted lr-accordion-item panels.</lr-accordion-item>
</lr-accordion>