:root{
  --bg:#070a13;
  --panel:rgba(255,255,255,.055);
  --panel-2:rgba(255,255,255,.09);
  --line:rgba(255,255,255,.12);
  --txt:#e9edfa;
  --muted:#93a0bd;
  --accent:#22d3ee;
  --danger:#fb7185;
  --ok:#4ade80;
  --warn:#fbbf24;
  --r:18px;
  --shadow:0 20px 45px -25px rgba(0,0,0,.9);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  color:var(--txt);
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(34,211,238,.20), transparent 60%),
    radial-gradient(800px 600px at 88% 0%, rgba(168,85,247,.20), transparent 60%),
    radial-gradient(900px 700px at 50% 110%, rgba(244,114,182,.16), transparent 60%),
    linear-gradient(180deg,#070a13 0%,#0a0f1f 50%,#070a13 100%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.35;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:46px 46px;
  mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000 0%,transparent 78%);
}

a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}

/* ---------- 布局 ---------- */
.wrap{max-width:1180px;margin:0 auto;padding:28px 20px 60px}
.gwrap{max-width:1000px;margin:0 auto;padding:20px 16px 56px}

/* ---------- 首页头部 ---------- */
.hero{text-align:center;padding:36px 0 26px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;font-size:12.5px;letter-spacing:.5px;
  color:#bfe9f5;background:rgba(34,211,238,.10);border:1px solid rgba(34,211,238,.32);
}
.hero h1{
  margin:16px 0 10px;font-size:clamp(30px,5.2vw,52px);line-height:1.15;letter-spacing:-.5px;
  background:linear-gradient(92deg,#22d3ee,#a855f7 45%,#f472b6);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{margin:0 auto;max-width:620px;color:var(--muted);font-size:15px;line-height:1.7}

/* ---------- 工具条 ---------- */
.toolbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:center;margin:26px 0 22px}
.search{
  position:relative;flex:1 1 260px;max-width:340px;
}
.search input{
  width:100%;padding:11px 14px 11px 36px;border-radius:12px;
  background:var(--panel);border:1px solid var(--line);color:var(--txt);outline:none;
  backdrop-filter:blur(10px);transition:.2s;
}
.search input:focus{border-color:rgba(34,211,238,.55);box-shadow:0 0 0 3px rgba(34,211,238,.12)}
.search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);opacity:.55}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chip{
  padding:8px 16px;border-radius:999px;font-size:13px;cursor:pointer;
  background:var(--panel);border:1px solid var(--line);color:var(--muted);
  backdrop-filter:blur(10px);transition:.2s;
}
.chip:hover{color:var(--txt);border-color:rgba(255,255,255,.28)}
.chip.on{
  color:#04121a;font-weight:600;border-color:transparent;
  background:linear-gradient(92deg,#22d3ee,#7dd3fc);
  box-shadow:0 8px 22px -10px #22d3ee;
}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{
  position:relative;display:flex;flex-direction:column;gap:12px;
  padding:22px;border-radius:var(--r);overflow:hidden;cursor:pointer;
  background:var(--panel);border:1px solid var(--line);
  backdrop-filter:blur(14px);transition:transform .25s,border-color .25s,box-shadow .25s;
}
.card::before{
  content:"";position:absolute;inset:0;opacity:0;transition:.25s;
  background:radial-gradient(420px 220px at 20% -10%,color-mix(in srgb,var(--accent) 28%,transparent),transparent 70%);
}
.card:hover{transform:translateY(-6px);border-color:color-mix(in srgb,var(--accent) 55%,transparent);box-shadow:0 24px 50px -26px var(--accent)}
.card:hover::before{opacity:1}
.card .icon{
  width:54px;height:54px;display:grid;place-items:center;font-size:28px;border-radius:15px;
  background:color-mix(in srgb,var(--accent) 16%,rgba(255,255,255,.04));
  border:1px solid color-mix(in srgb,var(--accent) 38%,transparent);
}
.card h3{margin:0;font-size:18px;letter-spacing:.2px}
.card p{margin:0;font-size:13.5px;color:var(--muted);line-height:1.6;min-height:44px}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:11.5px;padding:3px 9px;border-radius:999px;color:var(--muted);background:rgba(255,255,255,.06);border:1px solid var(--line)}
.card .go{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:color-mix(in srgb,var(--accent) 80%,#fff);font-weight:600;
}
.empty{grid-column:1/-1;text-align:center;color:var(--muted);padding:40px 0}

/* ---------- 游戏页 ---------- */
.topbar{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.back{
  display:inline-flex;align-items:center;gap:7px;padding:9px 15px;border-radius:12px;cursor:pointer;
  background:var(--panel);border:1px solid var(--line);color:var(--txt);font-size:14px;
  backdrop-filter:blur(10px);transition:.2s;
}
.back:hover{border-color:rgba(34,211,238,.5);color:#a5f3fc}
.topbar h1{margin:0;font-size:19px;letter-spacing:.3px}
.topbar .spacer{flex:1}

.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:16px;backdrop-filter:blur(14px);box-shadow:var(--shadow);
}
.hud{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.stat{
  flex:1 1 96px;padding:10px 14px;border-radius:13px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);text-align:center;
}
.stat .k{font-size:11.5px;color:var(--muted);letter-spacing:.6px}
.stat .v{font-size:21px;font-weight:700;margin-top:2px;font-variant-numeric:tabular-nums}

.stage{position:relative;display:grid;place-items:center;padding:6px;border-radius:16px;background:rgba(0,0,0,.28);border:1px solid var(--line)}
canvas{display:block;border-radius:10px;background:rgba(0,0,0,.42);max-width:100%;height:auto;touch-action:none}

.row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:14px}
.btn{
  padding:10px 18px;border-radius:12px;cursor:pointer;font-size:14px;font-weight:600;
  background:var(--panel-2);border:1px solid var(--line);transition:.2s;
}
.btn:hover{border-color:color-mix(in srgb,var(--accent) 60%,transparent);color:#fff}
.btn.primary{
  color:#04121a;border-color:transparent;
  background:linear-gradient(92deg,var(--accent),color-mix(in srgb,var(--accent) 55%,#fff));
  box-shadow:0 10px 26px -12px var(--accent);
}
.btn.ghost{background:transparent}

.tips{margin-top:14px;font-size:12.5px;color:var(--muted);line-height:1.9;text-align:center}
kbd{
  padding:1px 7px;border-radius:6px;font-size:11.5px;font-family:inherit;
  background:rgba(255,255,255,.09);border:1px solid var(--line);box-shadow:0 2px 0 rgba(0,0,0,.35);
}

.overlay{
  position:absolute;inset:0;display:none;place-items:center;text-align:center;
  background:rgba(6,9,18,.82);backdrop-filter:blur(7px);border-radius:16px;z-index:5;
}
.overlay.show{display:grid}
.overlay .box{padding:26px 30px;animation:pop .25s ease}
.overlay h2{margin:0 0 8px;font-size:26px}
.overlay p{margin:0 0 16px;color:var(--muted);font-size:14px}
@keyframes pop{from{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}

.toast{
  position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);
  padding:11px 20px;border-radius:12px;font-size:14px;opacity:0;pointer-events:none;z-index:99;
  background:rgba(16,20,34,.94);border:1px solid var(--line);backdrop-filter:blur(10px);transition:.28s;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 网格类游戏（2048 / 扫雷 / 记忆 / 井字棋 / 数独） ---------- */
.board{display:grid;gap:8px;margin:0 auto;user-select:none}
.cell{
  display:grid;place-items:center;border-radius:11px;font-weight:700;
  background:rgba(255,255,255,.05);border:1px solid var(--line);transition:.12s;
}
.tile{font-variant-numeric:tabular-nums}

.footer-note{text-align:center;color:var(--muted);font-size:12.5px;margin-top:34px;opacity:.75}

@media (max-width:520px){
  .hero{padding:22px 0 16px}
  .stat{flex:1 1 72px;padding:8px 10px}
  .stat .v{font-size:18px}
}