/* ================================================================
   纸质教辅书风格 · v7
   设计参考：中公/华图/粉笔实体辅导书
   原则：高密度 · 表格为主 · 彩色字标注 · 无装饰性色块 · 打印友好
   创建：2026-08-12 · 字体系统重构：2026-08-12 · 编年史组件：2026-08-12 (v6)
   ================================================================ */

  /* —— HarmonyOS Sans SC 字体 CDN ——
     拆分包：按 unicode-range 切分，lazy-load 需要的 woff2，只下当前页面用到的字形
     字体族名与本地安装版同名 "HarmonyOS Sans SC"：已安装走 local，否则走 CDN */
  @import url("https://cdn.jsdelivr.net/npm/harmonyos-sans-sc-webfont-splitted@1.1.0/dist/index.min.css");

  /* —— 字体系统（中文 / 西文 / 数字 各自最优渲染）—— */
  :root {
    /* 中文字体栈（HarmonyOS Sans 为主 → 苹方兜底 → Windows 兜底 → 通用兜底）*/
    --ff-zh-sans:  "HarmonyOS Sans SC", "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
    --ff-zh-serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "STSong", "SimSun", serif;

    /* 西文字体栈（ASCII 字符优先用西文字体，字形更和谐）*/
    --ff-en-serif: "Iowan Old Style", "Source Serif Pro", "Georgia", "Times New Roman", serif;
    --ff-en-sans:  -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --ff-mono:     "SF Mono", "JetBrains Mono", "Menlo", "Cascadia Code", Consolas, monospace;

    /* 组合（西文优先 → 浏览器按字符自动分配 → 中文兜底）*/
    --ff-body:    var(--ff-en-sans), var(--ff-zh-sans);   /* 正文：无衬线（HarmonyOS Sans）*/
    --ff-heading: var(--ff-en-serif), var(--ff-zh-sans);  /* 标题：西文衬线 + 中文 HarmonyOS Sans */
    --ff-mono-zh: var(--ff-mono), var(--ff-zh-sans);      /* 等宽 + 中文兜底 */
  }

  /* —— 基础重置 —— */
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { font-size: 16px; }
  body {
    font-family: var(--ff-body);
    font-feature-settings: "kern" 1, "liga" 1;   /* 字距 + 连字优化 */
    color: #1a1a1a;
    background: #f3f1ec;
    line-height: 1.8;
    padding: 24px 12px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  /* 公式变量：拉丁字母衬线斜体（数学惯例），<i> 包裹 */
  i { font-family: var(--ff-en-serif); font-style: italic; }

  /* —— 页面容器：A4 比例，最大 820px —— */
  .page {
    max-width: 820px;
    margin: 0 auto;
    background: #fffdf8;
    padding: 48px 56px;
    box-shadow: 0 1px 12px rgba(0,0,0,.08);
  }
  @media (max-width: 640px) {
    body { padding: 0; background: #fffdf8; }
    .page { padding: 24px 18px; box-shadow: none; }
  }

  /* ============ 标题层级 ============ */

  /* 顶部 breadcrumb · 极简 */
  .crumb {
    font-size: 12px;
    color: #6b6358;
    padding-bottom: 8px;
    border-bottom: 1px dashed #d4cdb8;
    margin-bottom: 24px;
  }
  .crumb a { color: #1e40af; text-decoration: none; }
  .crumb a:hover { color: #c0392b; text-decoration: underline; }
  .crumb .sep { margin: 0 6px; color: #aaa; }
  .crumb .here { color: #c0392b; font-weight: 600; }

  /* H2 章标题：宋体 + 朱红双重下划线 */
  h2.chapter {
    font-family: var(--ff-heading);
    font-size: 24px;
    font-weight: 900;
    color: #111;
    border-bottom: 3px double #c0392b;
    padding-bottom: 8px;
    margin: 32px 0 16px;
    letter-spacing: 1px;
    font-variant-numeric: lining-nums;  /* 标题数字用齐线大写 */
  }
  h2.chapter .num {
    color: #c0392b;
    font-family: var(--ff-en-serif);
    font-style: italic;
    margin-right: 6px;
  }
  h2.chapter .en {
    display: block;
    font-family: var(--ff-en-serif);
    font-size: 11px;
    color: #6b6358;
    letter-spacing: 2px;
    font-weight: 400;
    font-style: italic;
    margin-top: 2px;
    text-transform: uppercase;
  }

  /* H3 节标题：宋体 + 朱红左粗条 + 浅黄渐变 */
  h3.section {
    font-family: var(--ff-heading);
    font-size: 19px;
    font-weight: 800;
    color: #111;
    margin: 32px 0 14px;
    padding: 6px 0 6px 12px;
    border-left: 5px solid #c0392b;
    background: linear-gradient(to right, #fef3e6 0%, #fef3e6 30%, transparent 100%);
  }
  h3.section .sec-num {
    color: #c0392b;
    font-family: var(--ff-en-serif);
    margin-right: 8px;
  }

  /* H4 小节标题：宋体 + 朱红圆点 + 深蓝字（视觉权重介于 h3 和 h5 之间）*/
  h4.subsection {
    font-family: var(--ff-heading);
    font-size: 17px;
    font-weight: 700;
    color: #1e40af;
    margin: 28px 0 10px;
    padding-left: 2px;
  }
  h4.subsection::before {
    content: "● ";
    color: #c0392b;
    font-size: 10px;
    vertical-align: middle;
    margin-right: 4px;
  }

  /* H5 三级标题：宋体 + 左灰条 + 深褐灰（明显比 h4 弱，不再用红装饰）*/
  h5.minor {
    font-family: var(--ff-heading);
    font-size: 13.5px;
    font-weight: 700;
    color: #4a4238;
    margin: 14px 0 6px;
    padding-left: 8px;
    border-left: 2px solid #d4cdb8;
  }

  /* ============ 正文 ============ */
  p { font-size: 14.5px; margin: 8px 0; text-align: justify; }
  p.tight { margin: 4px 0; }
  p.lead {
    color: #6b6358;
    font-size: 13px;
    margin-bottom: 12px;
    padding: 6px 10px;
    background: #faf8f0;
    border-left: 3px solid #d4cdb8;
  }

  /* ============ 彩色重点字（直接内联）============ */
  .kw { color: #c0392b; font-weight: 700; }            /* 朱红·必背关键词 */
  .df { color: #1e40af; font-weight: 700; }            /* 深蓝·定义性 */
  .gd { color: #15803d; font-weight: 700; }            /* 墨绿·正面/正确 */
  .bd { color: #b91c1c; font-weight: 700; }            /* 砖红·错误/警示 */
  .un {
    text-decoration: underline;
    text-decoration-color: #c0392b;
    text-underline-offset: 3px;
    text-decoration-thickness: 1.5px;
  }
  .em { font-style: italic; color: #6b6358; }

  /* ============ 表格（高频组件）============ */
  table.tbl {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0 14px;
    font-size: 13.5px;
    line-height: 1.7;
    font-variant-numeric: tabular-nums;  /* 表格数字等宽对齐（刑期/年份/百分比） */
  }
  table.tbl th {
    background: #1a1a1a;
    color: #fff;
    padding: 8px 10px;
    text-align: left;
    font-weight: 700;
    font-family: var(--ff-heading);
    border: 1px solid #1a1a1a;
    letter-spacing: 1px;
  }
  table.tbl td {
    padding: 8px 10px;
    border: 1px solid #d4cdb8;
    vertical-align: top;
  }
  table.tbl tr:nth-child(even) td { background: #faf6ec; }
  table.tbl tr:hover td { background: #fef3e6; }
  table.tbl td.label {
    background: #f3ecd6 !important;
    font-weight: 700;
    font-family: var(--ff-heading);
    color: #2a2a2a;
  }
  table.tbl .star { color: #c0392b; font-weight: 800; }
  table.tbl caption {
    caption-side: top;
    text-align: left;
    font-size: 12px;
    color: #6b6358;
    margin-bottom: 4px;
    font-style: italic;
  }

  /* ============ 考点框（黄底）============ */
  .kaodian {
    background: #fef9c3;
    border-left: 4px solid #ca8a04;
    padding: 10px 14px;
    margin: 12px 0;
    font-size: 13.5px;
    line-height: 1.85;
  }
  .kaodian .title {
    color: #ca8a04;
    font-weight: 800;
    font-family: var(--ff-heading);
    margin-bottom: 4px;
    display: block;
    font-size: 14px;
  }

  /* ============ 易错框（红底）============ */
  .yicuo {
    background: #fef2f2;
    border-left: 4px solid #dc2626;
    padding: 10px 14px;
    margin: 12px 0;
    font-size: 13.5px;
    line-height: 1.85;
  }
  .yicuo .title {
    color: #b91c1c;
    font-weight: 800;
    font-family: var(--ff-heading);
    margin-bottom: 4px;
    display: block;
    font-size: 14px;
  }
  .yicuo .wrong { color: #b91c1c; text-decoration: line-through; }
  .yicuo .right { color: #15803d; font-weight: 700; }

  /* ============ 引文框（灰底）============ */
  blockquote.quote {
    background: #f5f3ec;
    border-left: 3px solid #6b6358;
    padding: 10px 14px;
    margin: 12px 0;
    font-size: 13.5px;
    line-height: 1.85;
    color: #2a2a2a;
    font-family: var(--ff-heading);
  }
  blockquote.quote::before {
    content: "📖 ";
    color: #6b6358;
  }

  /* ============ 思维导图（纯文本+框线）============ */
  .mindmap {
    background: #fafaf5;
    border: 1px solid #d4cdb8;
    padding: 12px 16px;
    margin: 10px 0 14px;
    font-family: var(--ff-mono-zh);
    font-size: 13px;
    line-height: 1.85;
    color: #2a2a2a;
    white-space: pre-wrap;
    overflow-x: auto;
  }
  .mindmap .root { color: #c0392b; font-weight: 800; }
  .mindmap .lv1 { color: #1e40af; font-weight: 700; }
  .mindmap .lv2 { color: #2a2a2a; }
  .mindmap .meta { color: #6b6358; font-size: 12px; }
  .mindmap .star { color: #c0392b; font-weight: 700; }

  /* ============ 章节内导航（书签式）============ */
  nav.bookmark {
    background: #fafaf5;
    border: 1px solid #d4cdb8;
    padding: 12px 16px;
    margin: 16px 0 24px;
    font-size: 13px;
  }
  nav.bookmark .title {
    font-family: var(--ff-heading);
    font-weight: 700;
    color: #6b6358;
    margin-bottom: 6px;
    font-size: 12px;
    letter-spacing: 1px;
  }
  nav.bookmark ol {
    list-style: none;
    margin: 0;
    padding: 0;
  }
  nav.bookmark li {
    padding: 3px 0;
    line-height: 1.7;
  }
  nav.bookmark li a {
    color: #1e40af;
    text-decoration: none;
  }
  nav.bookmark li a:hover { color: #c0392b; text-decoration: underline; }
  nav.bookmark li.h2 { font-weight: 700; color: #111; margin-top: 4px; }
  nav.bookmark li.h3 { padding-left: 16px; color: #2a2a2a; }
  nav.bookmark li.h4 { padding-left: 32px; color: #6b6358; font-size: 12px; }
  nav.bookmark li .num {
    color: #c0392b;
    font-family: var(--ff-en-serif);
    margin-right: 6px;
    font-size: 12px;
  }
  nav.bookmark li .status {
    font-size: 11px;
    padding: 1px 6px;
    margin-left: 6px;
    border: 1px solid #d4cdb8;
    color: #6b6358;
  }
  nav.bookmark li .status.doing { color: #c0392b; border-color: #c0392b; }
  nav.bookmark li .status.todo { color: #6b6358; }

  /* ============ 章节导航 / 页脚（极简）============ */
  .pgnav {
    display: flex;
    justify-content: space-between;
    margin: 32px 0 16px;
    padding: 12px 0;
    border-top: 1px solid #d4cdb8;
    border-bottom: 1px solid #d4cdb8;
    font-size: 13px;
  }
  @media (max-width: 640px) {
    .pgnav { flex-direction: column; gap: 6px; }
  }
  .pgnav a { color: #1e40af; text-decoration: none; }
  .pgnav a:hover { color: #c0392b; text-decoration: underline; }
  .footer {
    text-align: center;
    font-size: 12px;
    color: #6b6358;
    margin-top: 20px;
    padding-top: 12px;
    border-top: 1px dashed #d4cdb8;
  }

  /* ============ 速查盒（章末总速记）============ */
  .recap {
    background: #1a1a1a;
    color: #fffdf8;
    padding: 16px 20px;
    margin: 24px 0 16px;
    font-size: 13.5px;
    line-height: 1.9;
    font-variant-numeric: tabular-nums;  /* 押1抵2 等数字等宽对齐 */
  }
  .recap .title {
    font-family: var(--ff-heading);
    font-size: 15px;
    font-weight: 800;
    color: #fef9c3;
    margin-bottom: 6px;
    display: block;
    letter-spacing: 1px;
  }
  .recap .kw-w { color: #fef9c3; font-weight: 700; }
  .recap .gd-w { color: #86efac; font-weight: 700; }
  .recap .bd-w { color: #fca5a5; font-weight: 700; }

  /* ============ 编年史表（大事记 · 年份密集型时间轴）============ */
  .chronicle {
    background: #fffdf8;
    border: 1px solid #d4cdb8;
    border-left: 3px solid #1a1a1a;
    padding: 14px 18px;
    margin: 14px 0 18px;
    font-size: 13.5px;
    line-height: 1.75;
  }
  .chronicle > .title {
    font-family: var(--ff-heading);
    font-weight: 800;
    color: #111;
    font-size: 14.5px;
    margin-bottom: 8px;
    display: block;
    letter-spacing: 1px;
  }
  .chr-yr {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 8px 0;
    border-bottom: 1px dashed #e8e1cf;
  }
  .chr-yr:last-child { border-bottom: none; }
  .chr-year {
    flex: 0 0 64px;
    background: #1a1a1a;
    color: #fef9c3;
    font-family: var(--ff-en-serif);
    font-weight: 800;
    font-size: 15px;
    text-align: center;
    padding: 4px 0;
    letter-spacing: 1px;
    font-variant-numeric: tabular-nums;
  }
  .chr-events {
    flex: 1 1 auto;
    border-left: 2px solid #c0392b;
    padding-left: 14px;
  }
  .chr-ev {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 8px;
    padding: 2px 0;
  }
  .chr-date {
    color: #c0392b;
    font-family: var(--ff-mono);
    font-size: 12px;
    font-weight: 700;
    flex: 0 0 auto;
    min-width: 48px;
    font-variant-numeric: tabular-nums;
  }
  .chr-title {
    color: #111;
    font-weight: 700;
    flex: 0 0 auto;
  }
  .chr-desc {
    color: #4a4238;
    font-size: 13px;
    flex: 1 1 auto;
    min-width: 200px;
  }
  .chr-ev .kw { color: #c0392b; font-weight: 700; }
  @media (max-width: 640px) {
    .chr-yr { flex-direction: column; gap: 6px; }
    .chr-year { flex: none; width: fit-content; padding: 3px 10px; }
  }

  /* ============ 打印优化 ============ */
  @media print {
    body { background: #fff; padding: 0; font-size: 11pt; line-height: 1.6; }
    .page { box-shadow: none; padding: 0; max-width: none; }
    h2.chapter { page-break-before: always; }
    h3.section, h4.subsection { page-break-after: avoid; }
    table.tbl, .kaodian, .yicuo, .mindmap, blockquote.quote, .recap, .chronicle { page-break-inside: avoid; }
    .kaodian, .yicuo { border: 1px solid; }
    a { color: inherit; text-decoration: none; }
    .pgnav, .footer, .crumb { display: none; }
  }