/* ─────────────────────────────────────────────────────────────
 * fragments/article.css — 共享样式
 *
 * 被 fragments/ 下 29 篇文章页共用(每个文章 <link rel="stylesheet" href="article.css">)。
 *
 * 修改前请确认:改动会立即对所有 29 篇文章生效。
 * 原文来源:fragments/anti-mrsa-4drugs.html (第 12-81 行),5941 字节,字节级相同于全部 29 篇。
 *
 * 增强项(2026-07):
 *   1. .topbar 加 top: env(safe-area-inset-top, 0)(刘海屏安全区)
 *   2. .topbar z-index 30 → 20(与 knowledge-map.html 一致)
 *   3. .topbar 加 transition + .topbar.scrolled(scroll 加深阴影)
 *   4. 顶部新增 :focus-visible 全局键盘焦点环
 * ───────────────────────────────────────────────────────────── */

:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
:root{
  --bg:#F4F1EA;--bg-2:#EBE5D6;
  --ink:#1F3D2F;--ink-2:#2D5440;
  --accent:#E76F2C;--accent-2:#C45A1F;
  --text:#1F2421;--text-dim:#4A5247;--text-faint:#7A8074;
  --line:rgba(31,61,47,0.12);--line-strong:rgba(31,61,47,0.22);
}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  font-family:'Noto Serif SC','Space Grotesk',serif;
  color:var(--text);line-height:1.75;font-size:16px;
  min-height:100vh;
  background:radial-gradient(1200px 800px at 12% 8%,rgba(31,61,47,0.06) 0%,transparent 55%),radial-gradient(1000px 700px at 92% 18%,rgba(231,111,44,0.05) 0%,transparent 55%),linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%);
  -webkit-font-smoothing:antialiased;overflow-x:hidden
}
:lang(zh-CN),.cjk{font-family:'Noto Serif SC','Space Grotesk',serif}
a{color:var(--ink-2);text-decoration:none;transition:color .2s}a:hover{color:var(--accent)}

.topbar{position:sticky;top:env(safe-area-inset-top,0);z-index:20;display:flex;align-items:center;justify-content:space-between;margin:18px 18px 0;padding:14px 22px;background:rgba(244,241,234,0.85);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border:1px solid var(--line);border-radius:999px;box-shadow:0 4px 20px rgba(31,61,47,0.04);transition:box-shadow .3s ease,border-color .3s ease}
.topbar.scrolled{box-shadow:0 10px 32px rgba(31,61,47,0.10);border-color:rgba(31,61,47,0.18)}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:38px;height:38px;border-radius:50%;background:var(--ink);display:grid;place-items:center;color:var(--bg);font-family:'Space Grotesk',sans-serif;font-size:18px;font-weight:600;letter-spacing:-0.5px;box-shadow:0 2px 8px rgba(31,61,47,0.25)}
.brand-info{display:flex;flex-direction:column}
.brand-name{font-family:'Space Grotesk',sans-serif;font-weight:600;font-size:15px;letter-spacing:0.2px;color:var(--ink)}
.brand-sub{font-size:12px;color:var(--text-faint);margin-top:1px;font-family:'Noto Serif SC',serif;letter-spacing:0.5px}
.topbar-right{display:flex;align-items:center;gap:14px}
.home-pill{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;background:var(--ink);color:var(--bg);border-radius:999px;font-family:'Space Grotesk',sans-serif;font-size:13px;font-weight:500;text-decoration:none;transition:background .2s}
.home-pill:hover{background:var(--accent);color:var(--bg)}
.crumb{display:flex;align-items:center;gap:8px;font-family:'Space Grotesk',sans-serif;font-size:13px;color:var(--text-dim);letter-spacing:0.3px}
.crumb a{color:var(--ink-2);text-decoration:none;transition:color .2s}.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.4}

.doc{max-width:920px;margin:0 auto;padding:0 32px}
.hero{padding:72px 0 24px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:'Space Grotesk',sans-serif;font-size:12px;font-weight:500;color:var(--accent);letter-spacing:2.5px;text-transform:uppercase;margin-bottom:20px}
.eyebrow::before{content:'';width:28px;height:1px;background:var(--accent)}
h1{font-family:'Space Grotesk',sans-serif;font-size:clamp(40px,6vw,64px);font-weight:600;line-height:1;margin:0 0 16px;letter-spacing:-2px;color:var(--ink)}
h1 .dot{color:var(--accent)}
.lede{font-family:'Noto Serif SC',serif;font-size:16px;color:var(--text-dim);line-height:1.7;max-width:640px;margin:0}
.meta-row{display:flex;flex-wrap:wrap;gap:18px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-family:'Space Grotesk',sans-serif;font-size:12px;letter-spacing:1px;color:var(--text-faint);text-transform:uppercase}
.meta-row b{color:var(--ink);font-weight:600}

.article h2{font-family:'Noto Serif SC',serif;font-size:24px;font-weight:700;color:var(--ink);margin:48px 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.article h3{font-family:'Noto Serif SC',serif;font-size:19px;font-weight:700;color:var(--ink);margin:32px 0 12px}
.article h4{font-family:'Noto Serif SC',serif;font-size:16px;font-weight:700;color:var(--ink);margin:24px 0 8px}
.article p{font-family:'Noto Serif SC',serif;font-size:15px;line-height:1.8;color:var(--text-dim);margin:0 0 16px}
.article ul,.article ol{font-family:'Noto Serif SC',serif;font-size:15px;line-height:1.8;color:var(--text-dim);margin:0 0 16px;padding-left:24px}
.article li{margin-bottom:6px}
.article strong{color:var(--ink);font-weight:600}
.article em{color:var(--accent-2);font-style:normal;font-weight:600}
.article blockquote{margin:20px 0;padding:16px 20px;border-left:3px solid var(--accent);background:rgba(231,111,44,0.04);border-radius:0 10px 10px 0;font-family:'Noto Serif SC',serif;font-size:14px;color:var(--text-dim);line-height:1.7}
.article blockquote p{margin-bottom:6px}
.article blockquote p:last-child{margin-bottom:0}
.article code{font-family:'JetBrains Mono',monospace;font-size:13px;background:rgba(31,61,47,0.05);padding:1px 5px;border-radius:4px;color:var(--ink)}
.article pre{background:rgba(31,61,47,0.04);padding:18px 20px;border-radius:10px;overflow-x:auto;margin:20px 0;border:1px solid var(--line)}
.article pre code{background:none;padding:0;font-size:13px;line-height:1.6}
.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article th,.article td{padding:10px 14px;border:1px solid var(--line);text-align:left}
.article th{background:rgba(31,61,47,0.04);font-weight:600;color:var(--ink)}
.article tr:nth-child(even){background:rgba(31,61,47,0.02)}
.article hr{border:none;border-top:1px solid var(--line);margin:36px 0}

.footer{max-width:920px;margin:64px auto 0;padding:32px 32px 56px;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12px;color:var(--text-faint);font-family:'Space Grotesk',sans-serif;letter-spacing:0.5px}
.footer a{color:var(--ink-2)}.footer a:hover{color:var(--accent)}

@media(max-width:560px){.hero{padding:48px 0 16px}.doc{padding:0 18px}.topbar{margin:12px 12px 0;padding:12px 16px}.brand-sub{display:none}.crumb{display:none}}

/* ── Callout (Obsidian 风格: > [!important] / [!warning] / [!tip] / [!note]) ── */
.callout{margin:20px 0;padding:16px 20px;border-left:3px solid var(--accent);background:rgba(231,111,44,0.06);border-radius:0 10px 10px 0;font-family:'Noto Serif SC',serif;font-size:14.5px;color:var(--text-dim);line-height:1.7}
.callout p{margin:0 0 6px}
.callout p:last-child{margin:0}
.callout strong{color:var(--ink)}
.callout-title{display:block;font-family:'Space Grotesk',sans-serif;font-size:11px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;color:var(--accent);margin-bottom:8px}
.callout-important{border-left-color:var(--accent);background:rgba(231,111,44,0.08)}
.callout-important .callout-title{color:var(--accent)}
.callout-warning{border-left-color:#B8480C;background:rgba(184,72,12,0.07)}
.callout-warning .callout-title{color:#B8480C}
.callout-tip{border-left-color:var(--ink-2);background:rgba(31,61,47,0.05)}
.callout-tip .callout-title{color:var(--ink-2)}
.callout-note{border-left-color:var(--text-faint);background:rgba(31,61,47,0.03)}
.callout-note .callout-title{color:var(--text-dim)}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}}