/**
 * 画个标 · 留学主题字体库
 * 包含中文/英文排版推荐 + 可选的 Google Fonts 网络加载
 */
const HGB_Fonts = {
  groups: [
    {
      name: '中文 · 正式',
      items: [
        { family: 'SimSun', cn: '宋体', web: false, desc: '经典衬线，典雅学术' },
        { family: 'SimHei', cn: '黑体', web: false, desc: '现代无衬线，稳重清晰' },
        { family: 'KaiTi', cn: '楷体', web: false, desc: '手写感，亲和人文' },
        { family: 'Microsoft YaHei', cn: '微软雅黑', web: false, desc: '屏幕友好，现代通用' }
      ]
    },
    {
      name: '英文 · 衬线',
      items: [
        { family: 'Georgia', cn: 'Georgia', web: false, desc: '经典衬线，传统名校' },
        { family: 'Times New Roman', cn: 'Times', web: false, desc: '报刊气质，学术规范' },
        { family: 'Playfair Display', cn: 'Playfair', web: true, desc: '高端时尚衬线（网络加载）' }
      ]
    },
    {
      name: '英文 · 无衬线',
      items: [
        { family: 'Arial', cn: 'Arial', web: false, desc: '清晰通用，商务首选' },
        { family: 'Verdana', cn: 'Verdana', web: false, desc: '宽字距，易读性强' },
        { family: 'Montserrat', cn: 'Montserrat', web: true, desc: '现代几何感（网络加载）' },
        { family: 'Poppins', cn: 'Poppins', web: true, desc: '圆润时尚（网络加载）' }
      ]
    },
    {
      name: '英文 · 装饰',
      items: [
        { family: 'Impact', cn: 'Impact', web: false, desc: '粗壮有力，标题冲击' },
        { family: 'Courier New', cn: 'Courier', web: false, desc: '等宽打字机，复古文艺' }
      ]
    }
  ]
};

/** 动态加载 Google Fonts（网络可用时） */
HGB_Fonts.loadWebFont = function (family) {
  const id = 'hgb-font-' + family.replace(/[^a-zA-Z0-9]/g, '');
  if (document.getElementById(id)) return;
  const link = document.createElement('link');
  link.id = id;
  link.rel = 'stylesheet';
  link.href = 'https://fonts.googleapis.com/css2?family=' +
    encodeURIComponent(family.replace(/ /g, '+')) + ':wght@400;700;900&display=swap';
  document.head.appendChild(link);
};

/** 按 family 查找字体项 */
HGB_Fonts.find = function (family) {
  for (const g of this.groups) {
    const f = g.items.find(i => i.family === family);
    if (f) return f;
  }
  return null;
};