:root{
  --bg:#05070c; --panel:#0c111c; --panel2:#101827;
  --ink:#e8eef7; --muted:#8b96a8; --line:rgba(148,163,184,.16);
  --qwen:#ff6a2b; --cyan:#22d3ee; --green:#4ade80; --violet:#a78bfa;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.65; overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
code{background:#111a2b;border:1px solid var(--line);border-radius:6px;padding:1px 7px;font-size:.92em;font-family:ui-monospace,Menlo,monospace;color:#9fd8ff}

/* ── bg grid ── */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);
  background-size:44px 44px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
}
header,main,footer{position:relative;z-index:1}

/* ── header ── */
header{position:sticky;top:0;z-index:100;background:rgba(5,7,12,.8);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{font-weight:800;font-size:17px;letter-spacing:.3px}
.logo::before{content:"";display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:9px;
  background:linear-gradient(135deg,var(--qwen),var(--violet));box-shadow:0 0 12px rgba(255,106,43,.6)}
nav{display:flex;gap:4px}
nav a{padding:7px 14px;border-radius:99px;font-size:13.5px;color:var(--muted);transition:.2s}
nav a:hover{color:#fff;background:rgba(255,106,43,.14)}

/* ── hero ── */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;padding:64px 0 40px;min-height:560px}
@media(max-width:900px){.hero{grid-template-columns:1fr;padding-top:40px}}
.pill{display:inline-block;font-size:12.5px;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:6px 14px;margin-bottom:22px;background:rgba(255,255,255,.02)}
h1{font-size:clamp(36px,5.4vw,58px);line-height:1.12;letter-spacing:-.5px;margin-bottom:18px}
h1 .grad{background:linear-gradient(90deg,var(--qwen),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{color:var(--muted);font-size:16.5px;max-width:520px;margin-bottom:28px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:10px;font-size:14.5px;font-weight:600;
  background:linear-gradient(135deg,var(--qwen),#ff8f5a);color:#fff;box-shadow:0 8px 28px rgba(255,106,43,.35);transition:.2s;border:none;cursor:pointer}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(255,106,43,.5)}
.btn.ghost{background:transparent;border:1px solid var(--line);box-shadow:none;color:var(--ink)}
.btn.ghost:hover{border-color:var(--qwen);box-shadow:none}
.btn.small{padding:8px 16px;font-size:13px}
.hero-canvas{height:420px;border-radius:20px;border:1px solid var(--line);overflow:hidden;
  background:radial-gradient(600px 300px at 50% 40%,rgba(255,106,43,.08),transparent 70%),var(--panel)}
@media(max-width:900px){.hero-canvas{height:300px}}

/* ── stats ── */
.stats{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin:8px 0 20px}
@media(max-width:900px){.stats{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 16px;text-align:center;transition:.25s}
.stat:hover{border-color:rgba(255,106,43,.5);transform:translateY(-3px)}
.stat b{display:block;font-size:30px;font-weight:800;background:linear-gradient(90deg,#fff,var(--qwen));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat small{color:var(--muted);font-size:12px;display:block;margin-top:4px}

/* ── sections ── */
section{padding:44px 0;scroll-margin-top:70px}
h2{font-size:28px;margin-bottom:6px;display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.h-sub{font-size:13.5px;color:var(--muted);font-weight:400}

/* ── bench ── */
.bench-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px;margin-top:22px}
.bench{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px}
.bench .row1{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:12px}
.bench .row1 b{font-size:15px}
.bench .row1 span{font-size:12px;color:var(--muted)}
.bbar{height:9px;border-radius:99px;background:rgba(255,255,255,.06);overflow:hidden;margin-bottom:8px}
.bbar i{display:block;height:100%;border-radius:99px;width:0;transition:width 1.1s cubic-bezier(.22,1,.36,1)}
.bench .nums{display:flex;justify-content:space-between;font-size:12.5px}
.bench .nums .new{color:var(--qwen);font-weight:700}
.bench .nums .old{color:var(--muted)}
.bench .delta{font-size:11.5px;color:var(--green);margin-top:6px}

/* ── demos ── */
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
@media(max-width:860px){.demo-grid{grid-template-columns:1fr}}
.demo{background:linear-gradient(180deg,var(--panel),#0a0f1a);border:1px solid var(--line);border-radius:16px;padding:20px;transition:.25s}
.demo:hover{border-color:rgba(34,211,238,.4)}
.demo.wide{grid-column:1/-1}
.demo-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.demo-head h3{font-size:16.5px}
.badge{font-size:11px;font-family:ui-monospace,monospace;padding:4px 10px;border-radius:6px;background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.3);color:var(--cyan)}
.demo-desc{color:var(--muted);font-size:13.5px;margin-top:12px}
.canvas-box{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#070b12;position:relative}
.canvas-box canvas{display:block;width:100%}
#termOut{margin-top:10px}
.t-md{background:#0a101c;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:13.5px;margin:8px 0;animation:fadein .3s}
@keyframes fadein{from{opacity:0;transform:translateY(4px)}}
.t-md h1,.t-md h2,.t-md h3{margin:6px 0;font-size:15px;color:var(--cyan)}
.t-md ul{margin:6px 0 6px 18px}
.t-md code{margin:0 1px}
.t-md .hl-k{color:var(--violet);font-weight:600}
.t-md .hl-s{color:var(--green)}
.t-md .hl-c{color:#556;font-style:italic}

/* terminal */
.term{background:#0a0f19;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.term-bar{display:flex;align-items:center;gap:6px;padding:10px 14px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.02)}
.term-bar i{width:11px;height:11px;border-radius:50%}
.term-bar i:nth-child(1){background:#ff5f57}.term-bar i:nth-child(2){background:#febc2e}.term-bar i:nth-child(3){background:#28c840}
.term-bar span{margin-left:10px;font-size:12px;color:var(--muted);font-family:ui-monospace,monospace}
.term-body{padding:16px;font-family:ui-monospace,Menlo,monospace;font-size:13.5px}
.t-out{color:#b9c4d4;margin-bottom:10px}
.t-line{display:flex;align-items:center}
.t-prompt{color:var(--qwen);margin-right:10px;font-weight:700}
.t-input{color:#fff;flex:1}
.cursor{display:inline-block;width:8px;height:15px;background:var(--qwen);animation:blink 1s steps(1) infinite;vertical-align:text-bottom}
@keyframes blink{50%{opacity:0}}

/* typebox */
.typebox{background:#070b12;border:1px solid var(--line);border-radius:12px;padding:18px;font-family:ui-monospace,monospace;font-size:14px;color:#9fd8ff;min-height:86px;margin-bottom:14px}
.typebox::after{content:"▌";animation:blink 1s steps(1) infinite;color:var(--qwen)}
.counter-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.counter{background:#0a101c;border:1px solid var(--line);border-radius:10px;padding:12px;text-align:center}
.counter b{display:block;font-size:22px;color:var(--cyan)}
.counter small{color:var(--muted);font-size:11.5px}

/* ── stack ── */
.stack-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:22px}
@media(max-width:860px){.stack-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.stack-grid{grid-template-columns:1fr}}
.stack-item{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px;transition:.25s}
.stack-item:hover{border-color:rgba(167,139,250,.5);transform:translateY(-3px)}
.stack-item b{display:block;font-size:15px;margin-bottom:6px;color:var(--violet)}
.stack-item span{color:var(--muted);font-size:13px}

footer{border-top:1px solid var(--line);margin-top:40px;padding:28px 0;color:var(--muted);font-size:13px;text-align:center}
footer a{color:var(--qwen)}