:root{
  --bg:#0b0d12; --bg2:#0e1117; --panel:#151922; --panel2:#1b202b; --line:#262d3a;
  --txt:#eef1f7; --muted:#98a2b5; --faint:#6b7488;
  --accent:#6b8aff; --accent2:#a06bff; --amber:#ffc24b;
  --good:#3ecf8e; --warn:#ffb454; --chip:#222936;
  --grad:linear-gradient(120deg,#6b8aff,#a06bff);
  --shadow:0 10px 40px -12px #000a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei",Segoe UI,system-ui,sans-serif;
  background:radial-gradient(1200px 600px at 80% -10%, #18203a55, transparent),
             radial-gradient(900px 500px at -10% 0%, #2a184455, transparent), var(--bg);
  color:var(--txt);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}

/* ---------- nav ---------- */
.nav{display:flex;align-items:center;gap:6px;padding:12px 26px;border-bottom:1px solid var(--line);
  background:#0d10166b;backdrop-filter:blur(14px);position:sticky;top:0;z-index:20}
.nav .brand{display:flex;align-items:baseline;gap:9px;margin-right:18px}
.nav .logo{font-weight:800;font-size:19px;letter-spacing:.5px;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav .brandsub{font-size:11px;color:var(--faint);letter-spacing:.4px}
.nav a.tab{color:var(--muted);padding:7px 14px;border-radius:9px;font-size:14px;transition:.15s}
.nav a.tab:hover{color:var(--txt);background:var(--panel2)}
.nav a.tab.active{color:#fff;background:var(--panel2);box-shadow:inset 0 0 0 1px var(--line)}
.nav .spacer{flex:1}
.nav .llm{font-size:12px;color:var(--muted);border:1px solid var(--line);padding:5px 12px;border-radius:20px;white-space:nowrap}
.nav .llm.live{color:var(--good);border-color:#1f4d3a;background:#0f221a}
.nav .llm.mock{color:var(--warn);border-color:#5a4420;background:#221a0f}

.wrap{max-width:1180px;margin:0 auto;padding:26px 26px 80px}
.layout{display:grid;grid-template-columns:252px 1fr;gap:24px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px}
.card h3{margin:0 0 12px;font-size:13px;color:var(--muted);font-weight:600;letter-spacing:.4px}
h1{font-size:22px;margin:0 0 4px;letter-spacing:.2px}
.sub{color:var(--muted);font-size:13px;margin-bottom:20px}

/* ---------- form ---------- */
label{display:block;font-size:12px;color:var(--muted);margin:12px 0 6px}
input,select,textarea{width:100%;background:var(--panel2);border:1px solid var(--line);color:var(--txt);
  border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit;transition:.15s}
textarea{min-height:120px;resize:vertical;line-height:1.7}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #6b8aff22}
.btn{display:inline-flex;align-items:center;gap:7px;background:var(--grad);color:#fff;border:none;
  border-radius:10px;padding:10px 18px;font-size:14px;cursor:pointer;font-weight:600;transition:.15s}
.btn:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--txt)}
.btn.ghost:hover{background:var(--panel2);filter:none}
.btn.sm{padding:6px 12px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.chip{display:inline-flex;align-items:center;gap:5px;background:var(--chip);border:1px solid var(--line);
  color:var(--txt);border-radius:20px;padding:4px 11px;font-size:12px;cursor:pointer;transition:.15s}
.chip:hover{border-color:var(--accent)}
.chip.on{background:var(--grad);border-color:transparent;color:#fff}
.tag{background:#232a3b;color:#aab6d6;border-radius:7px;padding:2px 9px;font-size:12px;margin:2px 5px 2px 0;display:inline-block}
.muted{color:var(--muted)}

/* ---------- results ---------- */
.result{margin-bottom:13px;cursor:pointer;transition:.15s;position:relative}
.result .selbox{position:absolute;top:14px;right:14px;width:17px;height:17px;cursor:pointer;accent-color:var(--accent)}
.tag.src{cursor:pointer}
.tag.src:hover{background:var(--accent);color:#fff}
.result:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:var(--shadow)}
.result .meta{font-size:12px;color:var(--muted);margin:3px 0 9px}
.result .name{font-size:15px;font-weight:600}
.result .badge{font-size:11px;background:#2a3350;color:#bcccff;border-radius:6px;padding:2px 8px;margin-left:8px}
.quote{border-left:3px solid var(--accent);padding:4px 0 4px 12px;color:#c8cfde;font-size:13px;margin-top:7px}
mark{background:#6b8aff55;color:#fff;border-radius:3px;padding:0 2px}

/* ---------- charts ---------- */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.bar{height:9px;background:var(--grad);border-radius:5px}
.barrow{display:grid;grid-template-columns:150px 1fr 40px;gap:10px;align-items:center;margin:8px 0;font-size:13px}
.barrow .k{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:default}
.barrow .k[data-tip]:hover{color:#eaf0ff}
.kidtip{position:fixed;z-index:1000;max-width:380px;background:#0e1320;border:1px solid var(--line);
  color:#e8edf8;font-size:12.5px;line-height:1.6;padding:8px 11px;border-radius:9px;
  box-shadow:var(--shadow);pointer-events:none;white-space:normal}
.barrow .c{text-align:right;color:var(--muted)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.editrow{margin-bottom:10px}
.pill{font-size:11px;border-radius:10px;padding:2px 8px}
.pill.ai{background:#3a2f1a;color:var(--warn)}
.pill.ok{background:#19372b;color:var(--good)}
.answer{white-space:pre-wrap;font-size:14px;line-height:1.8;background:var(--panel2);
  border:1px solid var(--line);border-radius:14px;padding:18px;margin-top:14px}
.answer.md{white-space:normal}
.answer.md h1,.answer.md h2,.answer.md h3,.answer.md h4{margin:14px 0 8px;line-height:1.35}
.answer.md h1{font-size:20px}.answer.md h2{font-size:18px}.answer.md h3{font-size:16px}.answer.md h4{font-size:14px}
.answer.md h1:first-child,.answer.md h2:first-child,.answer.md h3:first-child{margin-top:0}
.answer.md p{margin:8px 0}
.answer.md ul,.answer.md ol{margin:8px 0;padding-left:22px}
.answer.md li{margin:3px 0}
.answer.md strong{color:#eaf0ff;font-weight:700}
.answer.md code{background:#0e1320;border:1px solid var(--line);border-radius:5px;padding:1px 6px;font-size:13px}
.answer.md pre{background:#0e1320;border:1px solid var(--line);border-radius:10px;padding:12px;overflow:auto;margin:10px 0}
.answer.md pre code{background:none;border:none;padding:0}
.answer.md blockquote{margin:8px 0;padding:4px 14px;border-left:3px solid var(--accent);color:var(--muted)}
.answer.md hr{border:none;border-top:1px solid var(--line);margin:14px 0}
.answer.md a{color:var(--accent)}
.empty{color:var(--muted);text-align:center;padding:44px 0;font-size:14px}
.histitem{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:var(--panel2);overflow:hidden}
.histitem:hover{border-color:#3a4258}
.histhead{display:flex;align-items:flex-start;gap:12px;padding:12px 14px;cursor:pointer;transition:.15s}
.histhead:hover{background:#1a2030}
.histq{font-size:14px;font-weight:600;color:#e8edf8;line-height:1.5}
.histq .qmark{display:inline-block;background:var(--accent);color:#fff;font-size:11px;font-weight:700;
  border-radius:5px;padding:0 6px;margin-right:8px;vertical-align:1px}
.histmeta{font-size:12px;color:var(--muted);margin-top:5px}
.histbody{padding:0 14px 14px;border-top:1px solid var(--line)}
.spin{display:inline-block;width:14px;height:14px;border:2px solid #fff5;border-top-color:#fff;
  border-radius:50%;animation:r .7s linear infinite}
@keyframes r{to{transform:rotate(360deg)}}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--grad);
  color:#fff;padding:11px 20px;border-radius:11px;font-size:14px;opacity:0;transition:.25s;pointer-events:none;box-shadow:var(--shadow)}
.toast.show{opacity:1}

/* ---------- landing ---------- */
.hero{max-width:980px;margin:0 auto;padding:64px 26px 28px;text-align:center}
.kicker{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--faint);text-transform:uppercase;margin-bottom:18px}
.wordmark{font-size:84px;font-weight:900;letter-spacing:2px;line-height:1;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.expand{font-size:22px;font-weight:600;margin-top:10px}
.expand b{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.herolede{color:var(--muted);font-size:15px;max-width:620px;margin:16px auto 0}
.quotecard{max-width:760px;margin:38px auto 0;background:linear-gradient(180deg,#161b27,#12161f);
  border:1px solid var(--line);border-radius:20px;padding:30px 34px;text-align:left;position:relative;overflow:hidden}
.quotecard:before{content:"“";position:absolute;top:-26px;left:14px;font-size:140px;color:#6b8aff22;font-family:Georgia,serif}
.quotecard .qen{font-size:20px;line-height:1.5;font-weight:600}
.quotecard .qen .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.quotecard .qzh{color:var(--muted);font-size:14px;margin-top:12px}
.quotecard .qby{color:var(--faint);font-size:13px;margin-top:14px;display:flex;align-items:center;gap:8px}
.note{max-width:760px;margin:18px auto 0;color:var(--faint);font-size:12.5px;text-align:center;line-height:1.7}

.entrygrid{max-width:980px;margin:46px auto 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;padding:0 26px}
.entry{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:24px;transition:.18s;display:block}
.entry:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:var(--shadow)}
.entry .ico{width:44px;height:44px;border-radius:12px;background:var(--panel2);display:grid;place-items:center;font-size:22px;margin-bottom:14px}
.entry h4{margin:0 0 6px;font-size:17px}
.entry p{margin:0;color:var(--muted);font-size:13px}

.statstrip{max-width:980px;margin:40px auto 0;display:flex;gap:14px;flex-wrap:wrap;justify-content:center;padding:0 26px}
.stat{flex:1;min-width:140px;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px 20px;text-align:center}
.stat .n{font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .l{color:var(--muted);font-size:12.5px;margin-top:4px}
.foot{text-align:center;color:var(--faint);font-size:12px;margin:56px auto 0}

@media(max-width:820px){
  .layout,.grid2,.split,.entrygrid{grid-template-columns:1fr}
  .wordmark{font-size:60px}
}