➆ 分层模型
p{text-indent:2em;2}
分层模型
#refplus, #refplus li{
padding:0;
margin:0;
list-style:none;
}；
document.querySelectorAll(".refplus-num").forEach((ref) => {
let refid = ref.firstChild.href.replace(location.origin+location.pathname,'');
let refel = document.querySelector(refid);
let refnum = refel.dataset.num;
let ref_content = refel.innerText.replace(`[${refnum}]`,'');
tippy(ref, {
...