:root{
  --bg:#f4f6fa; --card:#ffffff; --line:#e3e8f0; --text:#1b2430; --muted:#6b7889;
  --brand:#1f6feb; --brand-d:#1558c0; --ok:#1a9c5b; --warn:#c9821a; --danger:#d64545;
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg); color:var(--text); font-size:14px; line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
.wrap{max-width:1080px;margin:0 auto;padding:24px 16px 60px}
.narrow{max-width:420px;margin:0 auto;padding:48px 16px}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:0 1px 2px rgba(16,24,40,.04);padding:20px}
.card+.card{margin-top:16px}
.card h2{margin:0 0 4px;font-size:16px;font-weight:600}
.card .sub{color:var(--muted);font-size:12.5px;margin-bottom:14px}

.topbar{display:flex;align-items:center;justify-content:space-between;
  background:var(--card);border-bottom:1px solid var(--line);padding:0 20px;height:56px;
  position:sticky;top:0;z-index:20}
.brand{font-weight:700;font-size:15px;letter-spacing:.3px}
.brand span{color:var(--brand)}
.topbar nav{display:flex;gap:4px;flex-wrap:wrap}
.topbar nav a{padding:6px 12px;border-radius:8px;color:#41505f;font-size:13.5px}
.topbar nav a.on{background:#eaf1fd;color:var(--brand-d);font-weight:600}
.topbar .who{color:var(--muted);font-size:12.5px}

label.f{display:block;font-size:12.5px;color:var(--muted);margin:12px 0 6px}
input[type=text],input[type=password],input[type=number],select,textarea{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:9px;
  font-size:14px;background:#fff;color:var(--text);outline:none;font-family:inherit
}
input:focus,select:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,111,235,.12)}
textarea{min-height:120px;resize:vertical;font-family:ui-monospace,Consolas,monospace;font-size:12.5px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;border:none;border-radius:9px;font-size:14px;font-weight:600;
  cursor:pointer;background:var(--brand);color:#fff;transition:.15s}
.btn:hover{background:var(--brand-d)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
.btn.ghost:hover{background:#f7f9fc}
.btn.sm{padding:6px 12px;font-size:12.5px;border-radius:7px}
.btn.danger{background:var(--danger)}
.btn.block{width:100%}

.row{display:flex;gap:10px;flex-wrap:wrap}
.row>*{flex:1 1 0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:720px){.grid2,.grid3{grid-template-columns:1fr}}

.upload{border:2px dashed #c9d4e4;border-radius:12px;padding:28px 16px;text-align:center;
  cursor:pointer;background:#fafcff;transition:.15s}
.upload:hover{border-color:var(--brand);background:#f3f8ff}
.upload .ico{font-size:32px;line-height:1}
.upload .t{margin-top:8px;font-weight:600}
.upload .s{color:var(--muted);font-size:12.5px;margin-top:4px}

.pill{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;
  background:#eef2f7;color:#4a5a6d}
.pill.ok{background:#e6f6ee;color:var(--ok)}
.pill.warn{background:#fdf3e3;color:var(--warn)}
.pill.bad{background:#fdeaea;color:var(--danger)}
.pill.info{background:#e9f1ff;color:var(--brand-d)}

.kv{display:grid;grid-template-columns:88px 1fr;gap:6px 10px;font-size:13px}
.kv .k{color:var(--muted)}

.logbox{height:300px;overflow:auto;background:#0f1620;color:#d6e2f0;border-radius:10px;
  padding:12px 14px;font-family:ui-monospace,Consolas,monospace;font-size:12.5px;line-height:1.75}
.logbox .t{color:#6d8199;margin-right:8px}
.logbox .line{white-space:pre-wrap;word-break:break-all}

table.t{width:100%;border-collapse:collapse;font-size:13px}
table.t th,table.t td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.t th{background:#f7f9fc;color:#4a5a6d;font-weight:600;font-size:12.5px;white-space:nowrap}
table.t tr:hover td{background:#fafcff}
table.t td.num{font-variant-numeric:tabular-nums}

.empty{padding:36px 10px;text-align:center;color:var(--muted);font-size:13px}

.tabs{display:flex;gap:6px;margin-bottom:16px;flex-wrap:wrap}
.tabs button{padding:7px 14px;border-radius:8px;border:1px solid var(--line);
  background:#fff;cursor:pointer;font-size:13px;color:#41505f}
.tabs button.on{background:var(--brand);color:#fff;border-color:var(--brand)}

.toast{position:fixed;left:50%;top:22px;transform:translateX(-50%);z-index:999;
  background:#1b2430;color:#fff;padding:10px 18px;border-radius:10px;font-size:13.5px;
  box-shadow:0 8px 28px rgba(0,0,0,.18);opacity:0;transition:.25s;pointer-events:none;max-width:90vw}
.toast.show{opacity:1;transform:translateX(-50%) translateY(4px)}
.toast.err{background:var(--danger)}
.toast.ok{background:var(--ok)}

.timer{font-variant-numeric:tabular-nums;font-weight:700}
.timer.big{font-size:26px}
.center{text-align:center}
.mt8{margin-top:8px}.mt16{margin-top:16px}.mb8{margin-bottom:8px}
.hint{color:var(--muted);font-size:12.5px}
.mono{font-family:ui-monospace,Consolas,monospace}
.hidden{display:none!important}
.cover-qr{max-width:100%;border-radius:8px;border:1px solid var(--line)}