<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Kole UI · AnchorNav (H5)</title>
<link rel="stylesheet" href="../.design_library/kole-ui/colors_and_type.css">
<link rel="stylesheet" href="./AnchorNav.css">
<style>
  .demo { padding: 24px 200px 400px 24px; background: var(--kole-color-page-bg); font-family: var(--font-family); color: var(--kole-color-text-body); }
  h1 { font-size: 20px; margin: 0 0 24px; color: var(--kole-color-text-title); }
  .sub { color: var(--kole-color-text-secondary); margin: 0 0 24px; font-size: 12px; }
  section { background: var(--kole-color-card-bg); border: 1px solid var(--kole-color-border); border-radius: 8px; padding: 20px 24px; margin-bottom: 24px; scroll-margin-top: 24px; }
  section h2 { font-size: 16px; margin: 0 0 8px; }
  section p { color: var(--kole-color-text-tertiary); line-height: 1.8; margin: 0; }
</style>
</head>
<body>
<div class="demo">
  <h1>Kole UI · AnchorNav 组件（纯 H5）</h1>
  <p class="sub">对齐 AnchorNav 规范：右侧目录、滚动高亮、层级嵌套、点击平滑滚动</p>

  <nav class="kole-anchor fixed" id="anchor"></nav>

  <section id="intro"><h2>1. 产品简介</h2><p>本系统是一套企业级中后台解决方案……（长文本占位，可滚动测试高亮）</p><p style="margin-top:40px">更多内容用于撑高页面，方便观察当前章节高亮效果。</p></section>
  <section id="install"><h2>2. 安装与初始化</h2><p>通过 npm 安装后，在入口文件引入主题与组件库。</p><p style="margin-top:40px">配置项说明略。</p></section>
  <section id="guide">
    <h2>3. 开发指南</h2>
    <p>包含布局、主题与国际化三部分。</p>
    <div id="layout" style="margin-top:16px"><h3>3.1 布局</h3><p>侧边栏 + 顶栏的经典后台布局。</p></div>
    <div id="theme" style="margin-top:16px"><h3>3.2 主题</h3><p>通过 CSS 变量统一调整品牌色。</p></div>
  </section>
  <section id="faq"><h2>4. 常见问题</h2><p>收集部署与升级中的高频问题。</p><p style="margin-top:40px">FAQ 列表略。</p></section>
</div>

<script>
const ITEMS = [
  { key: 'intro', label: '产品简介' },
  { key: 'install', label: '安装与初始化' },
  { key: 'guide', label: '开发指南', children: [
    { key: 'layout', label: '布局' },
    { key: 'theme', label: '主题' }
  ] },
  { key: 'faq', label: '常见问题' }
];
const allKeys = [];
(function collect(list) { list.forEach(i => { allKeys.push(i.key); if (i.children) collect(i.children); }); })(ITEMS);

const anchor = document.getElementById('anchor');
function render() {
  anchor.innerHTML = ITEMS.map(it => {
    let html = `<button class="kole-anchor-item" role="link" tabindex="0" data-key="${it.key}">${it.label}</button>`;
    if (it.children) {
      html += '<div class="kole-anchor-sub">' + it.children.map(c => `<button class="kole-anchor-item" role="link" tabindex="0" data-key="${c.key}">${c.label}</button>`).join('') + '</div>';
    }
    return html;
  }).join('');
}
render();

anchor.addEventListener('click', (e) => {
  const btn = e.target.closest('.kole-anchor-item');
  if (!btn) return;
  const el = document.getElementById(btn.dataset.key);
  if (el) window.scrollTo({ top: el.getBoundingClientRect().top + window.scrollY - 24, behavior: 'smooth' });
});

function updateActive() {
  const pos = window.scrollY + 80;
  let active = allKeys[0];
  for (const k of allKeys) {
    const el = document.getElementById(k);
    if (el && el.offsetTop <= pos) active = k;
  }
  anchor.querySelectorAll('.kole-anchor-item').forEach(b => b.classList.toggle('is-active', b.dataset.key === active));
}
window.addEventListener('scroll', updateActive);
updateActive();
</script>
</body>
</html>
