/* 现场实录共享样式(单一真源) */
:root{--paper:#f4f1ea;--paper-2:#ece7dc;--ink:#1c1a17;--ink-soft:#46433d;--muted:#8a8478;--line:#ddd7ca;--accent:#6a4ee6;
    --serif:"Songti SC","Noto Serif SC",Georgia,"STSong",serif;--sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif;
    --scene-ent:#b5485b; --scene-gov:#3a6ea5; --scene-uni:#2e8b73; --scene-edu:#c2691f; --scene-startup:#7a5cc8;}
  *{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}
  body{font-family:var(--sans);background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased;line-height:1.85}
  .topbar{position:sticky;top:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:14px clamp(18px,5vw,40px);background:rgba(244,241,234,.94);-webkit-backdrop-filter:blur(22px) saturate(1.3);backdrop-filter:blur(22px) saturate(1.3);border-bottom:1px solid var(--line);font-size:14px}
  .topbar .brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);text-decoration:none}
  .topbar .brand .hex{width:15px;height:15px;background:var(--accent);border-radius:4px;transform:rotate(8deg)}
  .topbar .site{color:var(--muted);text-decoration:none;font-weight:600}.topbar .site:hover{color:var(--accent)}
  .topbar .topnav{display:flex;gap:clamp(10px,2.2vw,20px);align-items:center;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .topbar .topnav a{color:var(--muted);text-decoration:none;font-weight:600;white-space:nowrap}
  .topbar .topnav a:hover{color:var(--accent)} .topbar .topnav a.on{color:var(--ink)}
  .srcvid{margin-top:16px} .srcvid a{color:var(--accent);text-decoration:none;font-weight:600} .srcvid a:hover{text-decoration:underline}
  @media(max-width:600px){.topbar{font-size:12.5px;padding:12px 16px} .topbar .topnav{gap:13px}}
  .wrap{max-width:760px;margin:0 auto;padding:0 clamp(20px,5vw,28px)}
  header.hero{padding:clamp(48px,9vw,92px) 0 clamp(24px,4vw,40px)}
  .eyebrow{font-size:13px;letter-spacing:.16em;color:var(--muted);font-weight:700;text-transform:uppercase;margin-bottom:22px}
  h1{font-family:var(--serif);font-weight:700;font-size:clamp(34px,6.4vw,62px);line-height:1.1;letter-spacing:-.01em}
  h1 .em{color:var(--accent)}
  .sub{font-family:var(--serif);font-size:clamp(18px,2.6vw,26px);color:var(--ink-soft);margin-top:18px}
  .meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:24px;font-size:14px;color:var(--muted)}.meta b{color:var(--ink-soft);font-weight:600}
  .lead{font-size:clamp(16px,2vw,19px);color:var(--ink-soft);margin-top:26px;padding-top:24px;border-top:1px solid var(--line)}
  .toc{margin:clamp(26px,4vw,38px) 0;background:var(--paper-2);border:1px solid var(--line);border-radius:14px;padding:clamp(18px,3vw,26px)}
  .toc .tt{font-size:13px;letter-spacing:.12em;color:var(--muted);font-weight:700;text-transform:uppercase;margin-bottom:12px}
  .toc ol{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:6px 22px}
  .toc a{color:var(--ink-soft);text-decoration:none;font-size:15px;border-bottom:1px solid transparent}
  .toc a:hover{color:var(--accent);border-bottom-color:var(--accent)}
  @media(max-width:640px){.toc ol{grid-template-columns:1fr}}
  article{padding-bottom:60px}
  h2.part{font-family:var(--serif);font-weight:700;font-size:clamp(26px,4.6vw,40px);line-height:1.2;margin:clamp(50px,8vw,84px) 0 4px;scroll-margin-top:70px;padding-top:clamp(22px,4vw,30px);border-top:2px solid var(--ink)}
  h3{font-family:var(--serif);font-weight:700;font-size:clamp(19px,2.7vw,26px);line-height:1.3;margin:clamp(30px,5vw,46px) 0 2px;color:var(--ink);scroll-margin-top:70px}
  p{margin-top:15px;font-size:clamp(16px,1.9vw,18px)}p b,li b,p strong,li strong{font-weight:600;color:var(--ink)}
  ul,ol.body{margin:14px 0 0 0;padding-left:1.3em}li{margin-top:9px;font-size:clamp(16px,1.9vw,18px)}
  blockquote{background:var(--paper-2);border-left:4px solid var(--accent);border-radius:0 12px 12px 0;padding:14px 22px;margin:clamp(22px,4vw,32px) 0;color:var(--ink-soft);font-size:clamp(15px,1.85vw,17px)}
  blockquote p{margin-top:10px}blockquote p:first-child{margin-top:0}
  h2.part{border-top:none;padding-top:0;margin-top:clamp(46px,8vw,80px)}
  .part-tag{margin-top:clamp(46px,8vw,80px);margin-bottom:6px;font-size:13px;letter-spacing:.14em;color:var(--accent);font-weight:700}
  .part-tag + h2.part{margin-top:0!important}
  article p b,article p strong,article li b,article li strong{color:var(--accent);font-weight:600}
  figure{margin:clamp(26px,4.5vw,40px) 0;content-visibility:auto;contain-intrinsic-size:auto 480px}
  figure img{width:100%;height:auto;display:block;border-radius:12px;border:1px solid var(--line);box-shadow:0 14px 40px rgba(28,26,23,.12);background:#fff}
  figcaption{font-size:13.5px;color:var(--muted);margin-top:10px;text-align:center}
  .endnote{margin-top:clamp(46px,8vw,72px);padding-top:28px;border-top:1px solid var(--line);font-size:15px;color:var(--ink-soft)}
  .endnote a{color:var(--accent);text-decoration:none;font-weight:600}
  footer.foot{padding:30px 0 60px;text-align:center;color:var(--muted);font-size:13px}
  @media (prefers-color-scheme:dark){:root{--paper:#1b1a17;--paper-2:#26241f;--ink:#ece8df;--ink-soft:#c3bdb0;--muted:#8f897c;--line:#3a362e}.topbar{background:rgba(27,26,23,.93)}h2.part{border-top-color:var(--ink-soft)}}

  /* ===== 阅读优化规范(精修 2026-07) ===== */
  .wrap{max-width:700px}
  article p{font-size:18px;line-height:1.9;letter-spacing:.01em;margin-top:27px}
  .lead{font-size:18px;line-height:1.9;letter-spacing:.01em}
  h2.part{font-size:clamp(23px,4vw,32px);margin-top:clamp(56px,9vw,90px)}
  .part-tag{margin-top:clamp(56px,9vw,90px)}
  .part-tag + h2.part{margin-top:0!important}
  h3{font-size:clamp(18px,2.5vw,23px);margin-top:clamp(34px,5vw,48px)}
  article blockquote{font-size:clamp(16px,1.9vw,18px);line-height:1.85;margin:clamp(30px,5vw,42px) 0}

  /* ===== 补齐部件(2026-07) ===== */
  /* 正文内链接 */
  article a{color:var(--accent);text-decoration:underline;text-underline-offset:.2em;text-decoration-thickness:1px}
  article a:hover{text-decoration-thickness:2px}
  /* 行内代码 */
  article code{font-family:var(--mono,"JetBrains Mono",monospace);font-size:.9em;background:var(--paper-2);padding:.1em .4em;border-radius:5px}
  /* 提示块 callout */
  .callout{background:color-mix(in srgb,var(--accent) 8%,transparent);border-left:4px solid var(--accent);border-radius:0 12px 12px 0;padding:14px 20px;margin:clamp(22px,4vw,32px) 0;color:var(--ink-soft);font-size:clamp(15px,1.85vw,17px)}
  .callout p{margin-top:10px}.callout p:first-child{margin-top:0}.callout b,.callout strong{color:var(--accent)}

  /* ===== 无障碍 + 响应式(2026-07) ===== */
  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{transition-duration:.001ms!important;animation-duration:.001ms!important}
  }
  /* 键盘可见焦点 */
  a:focus-visible,.topnav a:focus-visible,.toc a:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:3px}
  /* 移动端精修 */
  @media(max-width:600px){
    article p{font-size:16.5px;line-height:1.85}
    h2.part{font-size:clamp(21px,6vw,26px)}
    .part-tag{margin-top:44px}
    .wrap{padding:0 18px}
  }