/* GameBox 展示站 —— 深空暗色 · 钴蓝→青 · 零外部字体（系统栈） */
:root{
  --bg:#06080E; --bg2:#0A0D16; --card:#0E121C; --card2:#121826;
  --line:rgba(130,160,220,.14); --line2:rgba(130,160,220,.24);
  --text:#EAEFF8; --muted:#8B95AC; --dim:#6A7391;
  --ac:#5B8CFF; --ac2:#32E0FF;
  --pure:#46E0A0; --three:#5B8CFF; --rapier:#F5A65B;
  --sans:"Space Grotesk",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans SC","Hiragino Sans","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"JetBrains Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.bg{position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 500px at 78% -8%,rgba(91,140,255,.16),transparent 60%),
    radial-gradient(700px 460px at 10% 4%,rgba(50,224,255,.10),transparent 55%),
    linear-gradient(180deg,#070A12,#06080E);}
.bg::after{content:"";position:absolute;inset:0;opacity:.35;
  background-image:linear-gradient(rgba(130,160,220,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(130,160,220,.05) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(1000px 600px at 50% -5%,#000,transparent 75%);
          mask-image:radial-gradient(1000px 600px at 50% -5%,#000,transparent 75%);}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
.center{text-align:center}
.muted{color:var(--muted)}
.mono{font-family:var(--mono)}

/* ---------- nav ---------- */
nav{position:sticky;top:0;z-index:60;background:rgba(8,11,18,.78);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{max-width:var(--wrap);margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:18px}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:18px;letter-spacing:.2px}
.brand b{background:linear-gradient(90deg,#EAEFF8,#9FB4E8);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:6px;margin-left:8px}
.nav-link{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:13.5px;
  padding:7px 11px;border-radius:9px;transition:.15s}
.nav-link:hover{color:var(--text);background:rgba(91,140,255,.10)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.nav-cta{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--text);
  border:1px solid var(--line2);border-radius:9px;padding:7px 13px;transition:.15s}
.nav-cta:hover{border-color:var(--ac);background:rgba(91,140,255,.12)}
@media(max-width:720px){.nav-links{display:none}}

/* lang dropdown */
.lang-dd{position:relative}
.lang-dd>summary{list-style:none;cursor:pointer;display:inline-flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:12.5px;color:var(--muted);
  border:1px solid var(--line);border-radius:9px;padding:6px 11px}
.lang-dd>summary::-webkit-details-marker{display:none}
.lang-dd[open]>summary{color:var(--text);border-color:var(--line2)}
.ls-panel{position:absolute;top:calc(100% + 8px);right:0;min-width:150px;background:var(--card);
  border:1px solid var(--line);border-radius:12px;padding:5px;z-index:70;
  box-shadow:0 18px 44px rgba(0,0,0,.55);display:grid;gap:2px}
.ls-item{display:flex;align-items:center;gap:9px;padding:9px 13px;border-radius:8px;font-size:13.5px;color:#C7CEDC}
.ls-item:hover{background:rgba(91,140,255,.10)}
.ls-item.on{color:var(--ac2);background:rgba(91,140,255,.13)}
.ls-chk{margin-left:auto;color:var(--ac2)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--sans);font-weight:600;
  font-size:15px;padding:12px 22px;border-radius:12px;cursor:pointer;border:1px solid transparent;transition:.16s}
.btn-primary{background:linear-gradient(90deg,var(--ac),#6E7CFF);color:#fff;box-shadow:0 8px 30px rgba(91,140,255,.28)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 36px rgba(91,140,255,.4)}
.btn-ghost{border-color:var(--line2);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--ac);background:rgba(91,140,255,.10)}

/* ---------- hero ---------- */
.hero{padding:74px 0 40px;text-align:center}
.kicker{display:inline-block;font-family:var(--mono);font-size:12.5px;color:var(--ac2);
  border:1px solid var(--line2);border-radius:999px;padding:6px 14px;margin-bottom:22px;
  background:rgba(50,224,255,.06)}
.hero-title{font-size:clamp(34px,6vw,60px);line-height:1.05;margin:0 0 18px;font-weight:700;letter-spacing:-.5px;
  background:linear-gradient(180deg,#fff,#B9C6EA);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:720px;margin:0 auto 30px;color:#C2CBDE;font-size:18px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-demo{max-width:900px;margin:52px auto 0;aspect-ratio:16/8;border-radius:18px;
  border:1px solid var(--line);background:var(--card);overflow:hidden;position:relative}
.hero-demo-cap{max-width:900px;margin:12px auto 0;font-family:var(--mono);font-size:12px;color:var(--dim);text-align:center}

/* ---------- sections ---------- */
section{padding:52px 0}
.sh{font-size:clamp(24px,3.4vw,34px);font-weight:700;margin:0 0 10px;letter-spacing:-.3px}
.sh.center{text-align:center}
.sub{color:var(--muted);font-size:15.5px;margin:0}
.sec-head{margin-bottom:30px}
.tx{color:#C2CBDE;font-size:17px;margin:0 0 16px}
.reveal{opacity:0;transform:translateY(16px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* stats */
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  border:1px solid var(--line);border-radius:16px;background:var(--card);padding:26px}
.stat{text-align:center}
.stat b{display:block;font-size:34px;font-weight:700;
  background:linear-gradient(90deg,var(--ac),var(--ac2));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{color:var(--muted);font-size:13px}
@media(max-width:640px){.stats-in{grid-template-columns:repeat(2,1fr)}}

/* tiers */
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:26px}
.tier-card{border:1px solid var(--line);border-radius:16px;background:var(--card);padding:22px}
.tier-card p{color:#C2CBDE;font-size:14.5px;margin:12px 0 0}
.tc-pure{border-top:2px solid var(--pure)}.tc-three{border-top:2px solid var(--three)}.tc-rapier{border-top:2px solid var(--rapier)}
.tier{display:inline-flex;align-items:center;font-family:var(--mono);font-size:11.5px;font-weight:600;
  padding:3px 9px;border-radius:7px;white-space:nowrap}
.tier-pure{color:var(--pure);background:rgba(70,224,160,.12);border:1px solid rgba(70,224,160,.3)}
.tier-three{color:var(--three);background:rgba(91,140,255,.12);border:1px solid rgba(91,140,255,.3)}
.tier-rapier{color:var(--rapier);background:rgba(245,166,91,.12);border:1px solid rgba(245,166,91,.3)}
@media(max-width:720px){.tier-grid{grid-template-columns:1fr}}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cat-card{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:20px;transition:.16s}
.cat-card:hover{border-color:var(--ac);transform:translateY(-2px);background:var(--card2)}
.cat-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.cat-top b{font-size:17px}
.cat-n{font-family:var(--mono);font-size:12px;color:var(--ac2);background:rgba(50,224,255,.1);
  border-radius:7px;padding:2px 9px}
.cat-preview{color:var(--muted);font-size:12.5px;font-family:var(--mono);line-height:1.5}
@media(max-width:860px){.cat-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.cat-grid{grid-template-columns:1fr}}

/* how / steps */
.steps{display:grid;gap:14px}
.step{display:flex;gap:16px;border:1px solid var(--line);border-radius:14px;background:var(--card);padding:18px 20px}
.step-n{flex-shrink:0;width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  font-family:var(--mono);font-weight:700;color:#fff;background:linear-gradient(135deg,var(--ac),var(--ac2))}
.step h4{margin:2px 0 5px;font-size:16px}
.step p{margin:0;color:#C2CBDE;font-size:14.5px}

/* install */
.inst-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.inst-card{min-width:0;border:1px solid var(--line);border-radius:16px;background:var(--card);padding:22px}
.inst-steps>li{min-width:0}
.inst-h{font-weight:700;font-size:16px;margin-bottom:14px;color:var(--ac2)}
.inst-steps{list-style:none;counter-reset:s;margin:0;padding:0;display:grid;gap:14px}
.inst-steps>li{counter-increment:s;position:relative;padding-left:30px}
.inst-steps>li::before{content:counter(s);position:absolute;left:0;top:1px;width:20px;height:20px;border-radius:6px;
  font-family:var(--mono);font-size:11px;display:grid;place-items:center;color:var(--muted);border:1px solid var(--line2)}
.inst-steps>li>span{font-size:13.5px;color:#C2CBDE;display:block;margin-bottom:7px}
.inst-invoke{font-size:13px;color:var(--muted);margin:4px 0 0}
@media(max-width:720px){.inst-grid{grid-template-columns:1fr}}

/* code blocks */
.code{min-width:0;position:relative;border:1px solid var(--line);border-radius:10px;background:#080B12;overflow:hidden}
.code pre{margin:0;padding:14px 16px;overflow:auto;font-family:var(--mono);font-size:12.5px;line-height:1.6;color:#CBD6EE}
.code .copy,.copy,.copy-path{cursor:pointer;font-family:var(--mono);font-size:11.5px;color:var(--muted);
  background:rgba(130,160,220,.10);border:1px solid var(--line2);border-radius:7px;padding:4px 10px;transition:.15s}
.copy:hover,.copy-path:hover{color:var(--text);border-color:var(--ac)}
.copy.done,.copy-path.done{color:var(--pure);border-color:var(--pure)}
.code>.copy{position:absolute;top:8px;right:8px;z-index:2}
.code-src pre{max-height:560px}

/* community */
.qr{border-radius:14px;margin:22px auto 12px;display:block;border:1px solid var(--line)}
.qr-note{color:var(--dim);font-size:12.5px;max-width:420px;margin:0 auto}

/* ---------- page header ---------- */
.phead{padding:38px 0 24px;border-bottom:1px solid var(--line)}
.crumb{font-family:var(--mono);font-size:12.5px;color:var(--muted);margin-bottom:14px}
.crumb a{color:var(--ac)}.crumb a:hover{text-decoration:underline}
.ptitle{font-size:clamp(26px,4vw,40px);margin:0 0 8px;font-weight:700;letter-spacing:-.4px}
.mtitle-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.psub{color:#C2CBDE;font-size:16px;margin:0;max-width:760px}

/* catalog tools */
.catalog-tools{display:flex;gap:14px;align-items:center;margin-top:22px;flex-wrap:wrap}
.search{flex:1;min-width:240px;font-family:var(--sans);font-size:14px;color:var(--text);
  background:var(--card);border:1px solid var(--line2);border-radius:11px;padding:11px 15px;outline:none}
.search:focus{border-color:var(--ac)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{cursor:pointer;font-family:var(--mono);font-size:12px;color:var(--muted);display:inline-flex;align-items:center;gap:6px;
  background:var(--card);border:1px solid var(--line2);border-radius:999px;padding:8px 14px;transition:.15s}
.chip:hover{color:var(--text)}
.chip.on{color:var(--text);border-color:var(--ac);background:rgba(91,140,255,.12)}
.dot{width:8px;height:8px;border-radius:50%}
.dot-pure{background:var(--pure)}.dot-three{background:var(--three)}.dot-rapier{background:var(--rapier)}
.empty{color:var(--muted);text-align:center;padding:40px;font-size:15px}

/* catalog grid */
.catalog{padding:34px 24px 60px}
.cat-sec{margin-bottom:40px;scroll-margin-top:90px}
.cat-sec-head{display:flex;align-items:baseline;gap:12px;margin-bottom:16px;
  border-bottom:1px solid var(--line);padding-bottom:10px}
.cat-sec-head h2{font-size:20px;margin:0}
.cat-count{font-family:var(--mono);font-size:12px;color:var(--muted)}
.mgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.mcard{min-width:0;border:1px solid var(--line);border-radius:13px;background:var(--card);padding:16px;display:flex;flex-direction:column;gap:9px;transition:.15s}
.mcard:hover{border-color:var(--line2);background:var(--card2)}
.mcard-top{display:flex;align-items:center;justify-content:space-between;gap:10px}
.mname{font-family:var(--mono);font-size:13.5px;font-weight:600;color:var(--text);word-break:break-word}
.mname:hover{color:var(--ac2)}
.mfunc{margin:0;color:var(--muted);font-size:13px;flex:1}
.mcard-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:2px;min-width:0}
.mpath{min-width:0;font-family:var(--mono);font-size:10.5px;color:var(--dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.copy-path{white-space:nowrap;flex-shrink:0}
@media(max-width:900px){.mgrid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.mgrid{grid-template-columns:1fr}}

/* module detail */
.module-body{padding:30px 24px 60px}
.meta-grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:13px;overflow:hidden;margin-bottom:22px}
.meta-row{display:grid;grid-template-columns:150px 1fr;gap:14px;background:var(--card);padding:13px 18px;align-items:center}
.mk{font-size:13px;color:var(--muted)}
.mv{font-size:14px;display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.pill{font-family:var(--mono);font-size:12px;color:var(--ac);border:1px solid var(--line2);border-radius:7px;padding:3px 9px}
.pill:hover{border-color:var(--ac);background:rgba(91,140,255,.1)}
.pill-dead{color:var(--dim);border-style:dashed}
.getthis{border:1px solid var(--line2);border-radius:13px;background:linear-gradient(180deg,rgba(91,140,255,.06),transparent);padding:18px 20px;margin-bottom:26px}
.gt-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
.gt-path{font-family:var(--mono);font-size:13px;color:var(--ac2);display:block;margin-bottom:8px;word-break:break-all}
.source .src-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.source .sh{font-size:20px;margin:0}

/* demos page */
.demo-tiernote{font-family:var(--mono);font-size:12px;color:var(--pure);margin:12px 0 0}
.demos-main{padding:34px 24px 60px;display:grid;gap:40px}
.demo-block{display:grid;grid-template-columns:minmax(0,340px) minmax(0,1fr);gap:26px;align-items:start}
.demo-info .mtitle-row{margin-bottom:10px}
.demo-info .sh{font-size:22px}
.demo-info .tx{font-size:15px;color:#C2CBDE}
.demo-controls{font-family:var(--mono);font-size:12.5px;color:var(--ac2);background:rgba(50,224,255,.07);
  border:1px solid var(--line2);border-radius:9px;padding:9px 13px;margin:14px 0}
.demo-mods{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:6px}
.dm-label{font-size:12px;color:var(--muted)}
.demo-stage{min-width:0;border:1px solid var(--line);border-radius:16px;background:var(--card);overflow:hidden;position:relative}
.demo-canvas{position:absolute;inset:0}
@media(max-width:820px){.demo-block{grid-template-columns:1fr}}

/* module page demo */
.mod-demo{margin:8px 0 30px}
.mod-demo .demo-stage{margin-top:12px}
.mod-demo .demo-controls{margin-top:12px}

/* footer */
footer{border-top:1px solid var(--line);padding:34px 0 44px;margin-top:20px;background:var(--bg2)}
.foot-in{display:flex;flex-direction:column;gap:12px;align-items:center;text-align:center}
.foot-brand{display:inline-flex;align-items:center;gap:8px;font-weight:700}
.foot-links{display:flex;gap:18px;flex-wrap:wrap;justify-content:center}
.foot-links a{color:var(--muted);font-size:14px}.foot-links a:hover{color:var(--text)}
.foot-note{color:var(--dim);font-size:12.5px}