:root{
  --navy:#1b3a5c; --blue:#2e5c8a; --ink:#1f2937; --muted:#5b6573;
  --line:#e3e7ec; --bg:#f6f7f9; --card:#fff; --accent:#d89a3a;
  --code:#f3f5f8; --ok:#1f7a4d;
  --th-bg:#f2f5f9; --th-bg2:#f7f9fb; --zebra:#fafbfc;
  --topbar:rgba(255,255,255,.92); --soft:#eef2f7;
  --note-bg:#fff8ee; --warn-bg:#fef4f1; --ok-bg:#f1f9f4;
  --shadow:0 1px 2px rgba(16,24,40,.04);
}
html[data-theme="dark"]{
  --navy:#d7e3f2; --blue:#8db8e6; --ink:#e6edf5; --muted:#9aa7b8;
  --line:#2a323d; --bg:#0e1116; --card:#161b22; --accent:#e0aa5a;
  --code:#1b222b; --ok:#5cc08b;
  --th-bg:#1b222b; --th-bg2:#1a212a; --zebra:#141a22;
  --topbar:rgba(14,17,22,.9); --soft:#1f2833;
  --note-bg:#241d12; --warn-bg:#2a1714; --ok-bg:#12241a;
  --shadow:0 1px 2px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.75 "Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;transition:background .18s,color .18s}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}

/* top bar */
.topbar{position:sticky;top:0;z-index:50;background:var(--topbar);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.topbar-in{max-width:1240px;margin:0 auto;padding:10px 22px;display:flex;
  align-items:center;gap:18px;flex-wrap:wrap}
.brand{font-weight:700;color:var(--navy);letter-spacing:.2px}
.brand span{color:var(--muted);font-weight:400;font-size:13px;margin-left:8px}
.topnav{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.topnav a{padding:6px 12px;border-radius:8px;font-size:13.5px;color:var(--muted)}
.topnav a:hover{background:var(--soft);text-decoration:none;color:var(--navy)}
.topnav a.on{background:var(--navy);color:var(--card)}
.themebtn{border:1px solid var(--line);background:transparent;color:var(--muted);
  width:32px;height:32px;border-radius:8px;cursor:pointer;font-size:14px;line-height:1;
  display:inline-flex;align-items:center;justify-content:center}
.themebtn:hover{background:var(--soft);color:var(--navy)}

/* layout */
.wrap{max-width:1240px;margin:0 auto;padding:26px 22px 70px;
  display:grid;grid-template-columns:238px minmax(0,1fr);gap:34px}
.toc{position:sticky;top:74px;align-self:start;max-height:calc(100vh - 100px);
  overflow:auto;font-size:13px;padding-right:6px}
.toc h4{margin:0 0 8px;font-size:12px;letter-spacing:1.5px;color:var(--muted);
  text-transform:uppercase;font-weight:600}
.toc ol{list-style:none;margin:0;padding:0}
.toc li{margin:0}
.toc a{display:block;padding:5px 10px;border-left:2px solid transparent;
  color:var(--muted);border-radius:0 6px 6px 0}
.toc a:hover{background:var(--soft);text-decoration:none;color:var(--navy)}
.toc a.on{border-left-color:var(--accent);background:var(--card);color:var(--navy);font-weight:600}
.toc li.sub a{padding-left:26px;font-size:12.5px;opacity:.92}
main{min-width:0}

/* doc */
.doc{background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:44px 52px 56px;box-shadow:var(--shadow)}
.eyebrow{font-size:12.5px;letter-spacing:2px;color:var(--accent);font-weight:700}
h1{font-size:30px;line-height:1.3;margin:6px 0 4px;color:var(--navy);letter-spacing:-.3px}
.sub{color:var(--muted);font-size:15px;margin:0 0 22px}
h2{font-size:20px;color:var(--navy);margin:44px 0 12px;padding-bottom:8px;
  border-bottom:1px solid var(--line);scroll-margin-top:80px}
h3{font-size:16px;color:var(--blue);margin:26px 0 8px;scroll-margin-top:80px}
h4{font-size:14.5px;margin:18px 0 6px;color:var(--ink)}
p{margin:9px 0}
ul,ol{margin:9px 0;padding-left:22px}
li{margin:4px 0}
small{color:var(--muted)}
hr{border:0;border-top:1px solid var(--line);margin:26px 0}

/* tables */
table{width:100%;border-collapse:separate;border-spacing:0;margin:14px 0;font-size:13.8px;
  border:1px solid var(--line)}
th,td{padding:9px 11px;text-align:left;vertical-align:top;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
th:last-child,td:last-child{border-right:0}
tbody tr:last-child td{border-bottom:0}
th{background:var(--th-bg);color:var(--navy);font-weight:600;white-space:nowrap;
  position:sticky;top:53px;z-index:3;box-shadow:inset 0 -1px 0 var(--line)}
td:first-child,th:first-child{white-space:nowrap}
table.score td:last-child,table.score th:last-child{white-space:nowrap}
table.score td{text-align:center}
table.score td:first-child{text-align:left}
tbody tr:nth-child(even){background:var(--zebra)}
td code,p code,li code{background:var(--code);padding:1px 5px;border-radius:4px;
  font:12.8px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--blue)}
.meta th{width:132px;background:var(--th-bg2)}

/* blocks */
.note{border-left:3px solid var(--accent);background:var(--note-bg);padding:12px 16px;
  border-radius:0 8px 8px 0;margin:16px 0;font-size:14px}
.note b{color:var(--accent)}
.warn{border-left:3px solid #c2410c;background:var(--warn-bg);padding:12px 16px;
  border-radius:0 8px 8px 0;margin:16px 0;font-size:14px}
.warn b{color:#c2410c}
.ok{border-left:3px solid var(--ok);background:var(--ok-bg);padding:12px 16px;
  border-radius:0 8px 8px 0;margin:16px 0;font-size:14px}
.startband{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
  background:var(--note-bg);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:0 10px 10px 0;padding:13px 18px;margin:18px 0 20px}
.startband b{display:block;font-size:14.5px;color:var(--accent)}
.startband span{font-size:13px;color:var(--muted);display:block;margin-top:3px}
.startband a{white-space:nowrap;font-weight:600;font-size:14px;color:var(--accent);text-decoration:none}
.startband a:hover{text-decoration:underline}
.ok code,.warn code,.note code{font-size:12.5px}
pre{background:#0f1b2b;color:#dbe6f3;padding:16px 18px;border-radius:10px;
  overflow:auto;font:12.8px/1.65 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;margin:14px 0}
pre .c{color:#7f9ab5}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:18px 0}
.kpi div{background:var(--th-bg2);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.kpi b{display:block;font-size:20px;color:var(--navy);line-height:1.4}
.kpi span{font-size:12.5px;color:var(--muted)}
.tag{display:inline-block;font-size:11.5px;padding:1px 7px;border-radius:20px;
  background:var(--soft);color:var(--blue);margin-right:4px}
.tag.p0{background:#fdecec;color:#b42318}
.tag.p1{background:#fff4e5;color:#a15c11}
.tag.p2{background:var(--soft);color:var(--muted)}
html[data-theme="dark"] .tag.p0{background:#3a1b1b;color:#f09a9a}
html[data-theme="dark"] .tag.p1{background:#33260f;color:#e0b070}

/* cards index */
.cards{display:flex;flex-wrap:wrap;gap:18px;margin:26px 0;justify-content:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;
  flex:0 1 340px;max-width:100%;
  transition:.18s;display:block;color:inherit}
.card:hover{border-color:var(--blue);box-shadow:0 8px 24px rgba(16,24,40,.07);text-decoration:none;transform:translateY(-2px)}
.card h3{margin:0 0 6px;color:var(--navy);font-size:18px}
.card p{margin:0;color:var(--muted);font-size:13.8px}
.card .go{margin-top:14px;font-size:13px;color:var(--accent);font-weight:600}

/* footer */
.foot{max-width:1240px;margin:0 auto;padding:0 22px 40px;color:var(--muted);font-size:12.5px}

@media (max-width:980px){
  .wrap{grid-template-columns:1fr;gap:18px}
  .toc{position:static;max-height:none;border:1px solid var(--line);background:var(--card);
    border-radius:12px;padding:14px 16px}
  .toc ol{columns:2;column-gap:18px}
  .doc{padding:26px 20px 34px;border-radius:12px}
  h1{font-size:24px}
  .grid2,.kpi{grid-template-columns:1fr}
  table{font-size:13px;display:block;overflow-x:auto}
  th{position:static}
  pre{font-size:11.5px;padding:12px;white-space:pre-wrap;word-break:break-word}
}
@media print{
  body{background:#fff;color:#000}
  .topbar,.toc,.foot,.themebtn{display:none}
  .wrap{display:block;padding:0;max-width:none}
  .doc{border:0;box-shadow:none;padding:0;border-radius:0}
  h2{page-break-after:avoid}
  table,pre{page-break-inside:avoid}
  a{color:#000;text-decoration:none}
}