:root{
    --bg:#ffffff; --panel:#f8fafc; --border:#e2e8f0; --text:#1f2933; --muted:#5b6b7a;
    --accent:#2563eb; --accent-soft:#eff6ff; --green:#16a34a; --green-soft:#f0fdf4;
    --orange:#d97706; --orange-soft:#fffbeb; --code-bg:#f6f8fa; --code-border:#d8dee4;
  }
  *{box-sizing:border-box;}
  body{font-family:"Microsoft YaHei","PingFang SC","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.75;margin:0;}
  .wrap{max-width:960px;margin:0 auto;padding:0 24px 80px;}
  header.hero{background:linear-gradient(135deg,#1e3a8a 0%,#2563eb 60%,#3b82f6 100%);color:#fff;padding:48px 24px 40px;margin-bottom:32px;}
  header.hero .wrap{padding:0 24px;}
  .hero h1{font-size:30px;margin:0 0 10px;}
  .hero p{margin:4px 0;opacity:.92;font-size:15px;}
  .badge{display:inline-block;background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.4);border-radius:20px;padding:2px 14px;font-size:13px;margin:6px 8px 0 0;}
  nav.toc{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px 24px;margin-bottom:36px;}
  nav.toc h2{margin:0 0 10px;font-size:17px;color:var(--accent);}
  nav.toc ol{margin:0;padding-left:22px;}
  nav.toc a{color:var(--text);text-decoration:none;}
  nav.toc a:hover{color:var(--accent);}
  h2.sec{font-size:24px;border-left:6px solid var(--accent);padding-left:14px;margin-top:56px;margin-bottom:8px;}
  h3{font-size:19px;margin-top:32px;color:#0f3b8c;}
  h4{font-size:16px;margin-top:24px;}
  p{margin:10px 0;}
  .card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px 22px;margin:18px 0;}
  .card.blue{background:var(--accent-soft);border-color:#bfdbfe;}
  .card.green{background:var(--green-soft);border-color:#bbf7d0;}
  .card.orange{background:var(--orange-soft);border-color:#fde68a;}
  .card .t{font-weight:700;margin-bottom:6px;}
  pre{background:var(--code-bg);border:1px solid var(--code-border);border-radius:10px;padding:16px 18px;overflow-x:auto;font-size:13.5px;line-height:1.65;margin:14px 0;}
  code{font-family:Consolas,"JetBrains Mono","Courier New",monospace;}
  p code, li code, td code{background:#eef2f7;border-radius:4px;padding:1px 6px;font-size:13px;color:#b91c1c;}
  pre .cm{color:#6a737d;} pre .kw{color:#cf222e;} pre .st{color:#0a3069;} pre .fn{color:#8250df;}
  table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;}
  th,td{border:1px solid var(--border);padding:8px 12px;text-align:left;vertical-align:top;}
  th{background:#eef2f7;font-weight:700;}
  tr:nth-child(even) td{background:#fbfdff;}
  .svg-box{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:14px;margin:20px 0;}
  .svg-box .cap{text-align:center;color:var(--muted);font-size:13px;margin-top:8px;}
  svg{width:100%;height:auto;display:block;}
  .pill{display:inline-block;border-radius:14px;padding:1px 12px;font-size:12px;font-weight:700;}
  .pill.b{background:#dbeafe;color:#1d4ed8;} .pill.g{background:#dcfce7;color:#15803d;} .pill.o{background:#fef3c7;color:#b45309;} .pill.r{background:#fee2e2;color:#b91c1c;}
  ul.check{list-style:none;padding-left:4px;}
  ul.check li::before{content:"✅ ";font-size:13px;}
  ul.warn{list-style:none;padding-left:4px;}
  ul.warn li::before{content:"⚠️ ";}
  .kbd{background:#e2e8f0;border:1px solid #cbd5e1;border-bottom-width:2px;border-radius:5px;padding:1px 7px;font-size:12.5px;font-family:Consolas,monospace;}
  .filetag{display:inline-block;background:#111827;color:#fff;border-radius:6px;padding:2px 10px;font-size:12.5px;font-family:Consolas,monospace;margin-right:6px;}

/* ===== 多页面导航 ===== */
.navbar{position:sticky;top:0;background:#ffffffee;backdrop-filter:blur(6px);border-bottom:1px solid var(--border);z-index:100;}
.navbar .inner{max-width:1080px;margin:0 auto;display:flex;flex-wrap:wrap;gap:2px;padding:8px 16px;align-items:center;}
.navbar a{color:#334155;text-decoration:none;font-size:13px;padding:4px 10px;border-radius:8px;white-space:nowrap;}
.navbar a:hover{background:var(--accent-soft);color:var(--accent);}
.navbar a.brand{font-weight:700;color:var(--accent);margin-right:8px;}
.navbar a.active{background:var(--accent);color:#fff;}
header.hero{margin-bottom:24px;}
.home-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px;margin:22px 0 8px;}
a.nav-card{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--text);padding:16px 18px;border-radius:12px;border:1px solid var(--border);background:var(--panel);transition:.15s;}
a.nav-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 4px 14px rgba(37,99,235,.12);}
a.nav-card .num{font-size:22px;font-weight:800;color:var(--accent);opacity:.55;font-family:Consolas,monospace;}
.pager{display:flex;justify-content:space-between;margin-top:44px;}
.pager a{color:var(--accent);text-decoration:none;font-weight:700;background:var(--accent-soft);border:1px solid #bfdbfe;border-radius:10px;padding:8px 18px;}
.pager a:hover{background:#dbeafe;}
img{border-radius:8px;}