:root{
  --bg:#0f172a; --card:#1e293b; --card2:#273449; --text:#e2e8f0; --muted:#94a3b8;
  --primary:#3b82f6; --accent:#f59e0b; --green:#22c55e; --red:#ef4444;
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:linear-gradient(160deg,#0f172a,#1e1b4b 60%,#172554);color:var(--text);
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;min-height:100vh}
.topbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;
  background:rgba(15,23,42,.8);backdrop-filter:blur(8px);position:sticky;top:0;z-index:50;
  border-bottom:1px solid rgba(148,163,184,.15)}
.brand{font-weight:800;font-size:17px;color:#fff}
.nav-links{display:flex;gap:4px;flex-wrap:wrap}
.nav-links a{color:var(--muted);text-decoration:none;font-size:13px;padding:5px 9px;border-radius:9px;white-space:nowrap}
.nav-links a.on,.nav-links a:hover{color:#fff;background:rgba(59,130,246,.25)}
.container{max-width:760px;margin:0 auto;padding:16px 14px 80px}
.card{background:var(--card);border-radius:var(--radius);padding:18px;margin-bottom:14px;
  border:1px solid rgba(148,163,184,.12)}
.card h2{font-size:16px;margin-bottom:10px}
.muted{color:var(--muted);font-size:13px}
.flex{display:flex;gap:10px;align-items:center}
.between{justify-content:space-between}
.btn{display:inline-block;background:var(--primary);color:#fff;border:none;border-radius:12px;
  padding:12px 22px;font-size:15px;font-weight:700;cursor:pointer;text-align:center;text-decoration:none}
.btn:active{transform:scale(.97)}
.btn.gold{background:linear-gradient(135deg,#f59e0b,#ef4444);box-shadow:0 4px 16px rgba(245,158,11,.35)}
.btn.ghost{background:transparent;border:1px solid rgba(148,163,184,.4);color:var(--text)}
.btn.sm{padding:7px 14px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.badge{display:inline-block;padding:3px 10px;border-radius:99px;font-size:12px;font-weight:700}
.badge.gold{background:rgba(245,158,11,.2);color:#fbbf24}
.badge.blue{background:rgba(59,130,246,.2);color:#60a5fa}
.badge.green{background:rgba(34,197,94,.2);color:#4ade80}
.stat{text-align:center}
.stat .num{font-size:28px;font-weight:900;color:#fff}
.stat .label{font-size:12px;color:var(--muted)}
.rank-item{display:flex;align-items:center;gap:12px;padding:10px 6px;border-bottom:1px solid rgba(148,163,184,.08)}
.rank-item:last-child{border:none}
.rank-no{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-weight:800;background:var(--card2)}
.rank-no.top1{background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#1e293b}
.rank-no.top2{background:linear-gradient(135deg,#e2e8f0,#94a3b8);color:#1e293b}
.rank-no.top3{background:linear-gradient(135deg,#fcd34d,#b45309);color:#1e293b}
.me-row{background:rgba(59,130,246,.15);border-radius:12px}
input[type=text],input[type=password],textarea{width:100%;background:var(--card2);border:1px solid rgba(148,163,184,.25);
  border-radius:12px;color:#fff;padding:12px 14px;font-size:15px;outline:none}
input:focus{border-color:var(--primary)}
label{font-size:13px;color:var(--muted);display:block;margin:10px 0 5px}
.flash{background:rgba(239,68,68,.15);color:#fca5a5;padding:10px 14px;border-radius:10px;margin-bottom:12px;font-size:14px}
.progress{height:8px;background:var(--card2);border-radius:99px;overflow:hidden;margin:8px 0}
.progress>div{height:100%;background:linear-gradient(90deg,#3b82f6,#22c55e);border-radius:99px;transition:width .3s}
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:9px 6px;text-align:left;border-bottom:1px solid rgba(148,163,184,.1)}
th{color:var(--muted);font-weight:600}
audio{width:100%;height:36px;margin-top:6px}
@media(max-width:480px){.grid2{grid-template-columns:1fr}}