:root{
  --bg:#0a0e1a;
  --panel:#121a2e;
  --panel2:#1b2540;
  --line:#2a3554;
  --text:#e8ecf7;
  --muted:#8b96b5;
  --neon:#ff2e88;
  --neon2:#22d3ee;
  --neon3:#ffd23f;
  --ok:#34d399;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;
}
.bg-grid{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:linear-gradient(rgba(34,211,238,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(34,211,238,.05) 1px,transparent 1px);
  background-size:40px 40px;
  mask-image:radial-gradient(ellipse at 50% 0,#000 30%,transparent 80%);
}
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px;background:rgba(10,14,26,.85);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;
}
.logo{display:flex;align-items:center;gap:10px}
.logo-icon{font-size:26px;filter:drop-shadow(0 0 8px var(--neon))}
.logo-text{font-size:20px;font-weight:800;letter-spacing:1px;background:linear-gradient(90deg,var(--neon),var(--neon2));-webkit-background-clip:text;background-clip:text;color:transparent}
.logo-sub{display:block;font-size:10px;letter-spacing:3px;color:var(--muted);-webkit-text-fill-color:var(--muted)}
.topbar-right{display:flex;align-items:center;gap:10px}
.device-badge{font-size:12px;padding:4px 10px;border:1px solid var(--line);border-radius:20px;color:var(--muted)}
.btn{border:none;border-radius:10px;cursor:pointer;font-size:14px;font-weight:600;padding:10px 18px;transition:.15s}
.btn.ghost{background:var(--panel2);color:var(--text);border:1px solid var(--line)}
.btn.ghost:hover{border-color:var(--neon2)}
.btn.primary{background:linear-gradient(90deg,var(--neon),var(--neon2));color:#0a0e1a}
.btn.primary:hover{filter:brightness(1.15)}
.btn.small{padding:6px 12px;font-size:12px}
main{max-width:1200px;margin:0 auto;padding:20px}
.hero{text-align:center;padding:36px 0 22px}
.hero h1{font-size:clamp(28px,5vw,48px);font-weight:900;background:linear-gradient(90deg,var(--neon),var(--neon2),var(--neon3));-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 30px rgba(255,46,136,.25)}
.hero p{margin-top:10px;color:var(--muted);font-size:15px}
.hero p b{color:var(--neon3)}
.hero-actions{margin-top:18px;display:flex;justify-content:center}
.search{width:min(520px,90vw);padding:12px 18px;border-radius:30px;border:1px solid var(--line);background:var(--panel2);color:var(--text);font-size:15px;outline:none}
.search:focus{border-color:var(--neon2);box-shadow:0 0 0 3px rgba(34,211,238,.15)}
.filters{margin-top:16px;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chip{padding:7px 16px;border-radius:20px;border:1px solid var(--line);background:var(--panel);color:var(--muted);cursor:pointer;font-size:13px;transition:.15s}
.chip:hover{color:var(--text);border-color:var(--neon2)}
.chip.active{background:linear-gradient(90deg,var(--neon),var(--neon2));color:#0a0e1a;border-color:transparent;font-weight:700}
.stats{display:flex;gap:16px;justify-content:center;margin:8px 0 20px;color:var(--muted);font-size:13px}
.stats b{color:var(--neon2)}
.game-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;
  cursor:pointer;transition:.18s;position:relative;
}
.card:hover{transform:translateY(-4px);border-color:var(--neon);box-shadow:0 10px 30px rgba(255,46,136,.18)}
.card .thumb{aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;font-size:44px;background:radial-gradient(circle at 30% 20%,var(--panel2),var(--bg));position:relative}
.card .tag{position:absolute;top:8px;right:8px;font-size:11px;padding:3px 8px;border-radius:8px;font-weight:700}
.tag.builtin{background:rgba(34,211,238,.18);color:var(--neon2)}
.tag.rom{background:rgba(255,210,63,.18);color:var(--neon3)}
.tag.p2{position:absolute;top:8px;left:8px;background:rgba(255,46,136,.2);color:var(--neon);font-size:11px;padding:3px 8px;border-radius:8px;font-weight:700}
.card .info{padding:12px 14px}
.card .name{font-size:15px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card .meta{font-size:12px;color:var(--muted);margin-top:4px}
.empty-state{text-align:center;color:var(--muted);padding:60px 0}
footer{border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:12px;padding:20px;margin-top:20px}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}
.modal-box{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;max-width:560px;width:100%}
.modal-box h3{margin-bottom:14px}
.modal-box h4{margin:8px 0 6px;color:var(--neon2)}
.keys-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.keys-grid p{margin:4px 0;font-size:13px;color:var(--text)}
kbd{background:var(--panel2);border:1px solid var(--line);border-bottom-width:3px;border-radius:6px;padding:2px 7px;font-size:12px;font-family:monospace;color:var(--neon3)}
.hint{color:var(--muted);font-size:12px;margin:14px 0}
@media(max-width:640px){
  .game-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:10px}
  .keys-grid{grid-template-columns:1fr}
  .card .name{font-size:13px}
}