:root{
  --bg:#f5f6f8; --panel:#ffffff; --side:#ffffff; --line:#e8eaf0; --text:#1b1f27; --sub:#6b7280;
  --primary:#2563eb; --primary-2:#4f46e5; --accent:#0ea5e9; --ok:#16a34a; --warn:#f59e0b; --danger:#ef4444;
  --radius:14px; --shadow:0 1px 3px rgba(16,24,40,.06),0 8px 24px rgba(16,24,40,.06);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:14px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
input,select,textarea{font-family:inherit;font-size:14px}

/* layout */
.app{display:flex;min-height:100vh}
.side{width:232px;background:var(--side);border-right:1px solid var(--line);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;overflow:auto}
.brand{display:flex;align-items:center;gap:10px;padding:18px 18px 14px}
.brand .logo{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;display:grid;place-items:center;font-weight:800;font-size:16px}
.brand b{font-size:16px;letter-spacing:.3px}
.brand small{display:block;color:var(--sub);font-size:11px;font-weight:400}
.nav{padding:6px 10px 20px;flex:1}
.nav .group{color:#9aa3b2;font-size:11px;padding:14px 10px 6px;letter-spacing:.5px}
.nav a{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:9px;color:#374151;margin:1px 0}
.nav a:hover{background:#f3f4f7}
.nav a.on{background:linear-gradient(135deg,rgba(37,99,235,.10),rgba(79,70,229,.10));color:var(--primary);font-weight:600}
.nav a .i{width:18px;text-align:center;opacity:.9}
.sidefoot{border-top:1px solid var(--line);padding:12px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.top{height:60px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 22px;position:sticky;top:0;z-index:5}
.top .t{font-weight:600}
.top .r{display:flex;align-items:center;gap:12px}
.content{padding:22px;max-width:1180px;width:100%}

/* components */
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.card+.card{margin-top:16px}
h2.sec{font-size:18px;margin:0 0 4px}
p.hint{color:var(--sub);margin:0 0 16px;font-size:13px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.g3,.g4{grid-template-columns:1fr 1fr}.g2{grid-template-columns:1fr}}
label.f{display:block;font-size:12px;color:var(--sub);margin:0 0 6px}
textarea,input.t,select.t{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 12px;outline:none;background:#fbfbfd}
textarea{min-height:96px;resize:vertical}
textarea:focus,input.t:focus,select.t:focus{border-color:var(--primary);background:#fff}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:10px 16px;font-weight:600}
.btn.primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;border:none}
.btn.ghost{background:#fff}
.btn.sm{padding:6px 12px;font-size:13px;border-radius:8px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.pill{display:inline-flex;align-items:center;gap:6px;background:#eef2ff;color:#4338ca;border-radius:999px;padding:4px 10px;font-size:12px}
.pill.g{background:#ecfdf5;color:#047857}.pill.o{background:#fff7ed;color:#b45309}.pill.r{background:#fef2f2;color:#b91c1c}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.stat .n{font-size:22px;font-weight:800}.stat .l{color:var(--sub);font-size:12px;margin-top:2px}
table{width:100%;border-collapse:collapse}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);font-size:13px}
th{color:var(--sub);font-weight:600;background:#fafbfc}
.mono{font-family:ui-monospace,Menlo,monospace}
.out{background:#0f172a;color:#e2e8f0;border-radius:12px;padding:16px;white-space:pre-wrap;line-height:1.65;min-height:120px;font-size:13px}
.thumb{width:100%;border-radius:12px;border:1px solid var(--line);display:block;background:#f8fafc}
.toast{position:fixed;right:20px;bottom:20px;background:#111827;color:#fff;padding:12px 16px;border-radius:10px;opacity:0;transform:translateY(8px);transition:.25s;z-index:99}
.toast.show{opacity:1;transform:none}
.modal{position:fixed;inset:0;background:rgba(15,23,42,.45);display:none;place-items:center;z-index:50;padding:20px}
.modal.show{display:grid}
.modal .box{background:#fff;border-radius:16px;max-width:920px;width:100%;max-height:90vh;overflow:auto;padding:22px}
.pp{padding:2px 6px;border-radius:8px}
.muted{color:var(--sub)}
.center{display:grid;place-items:center;min-height:60vh}

/* 消息铃铛 + 红点 */
.bell{position:relative;border:none;background:transparent;font-size:18px;line-height:1;padding:4px 6px;border-radius:8px}
.bell:hover{background:#f3f4f7}
.badge{position:absolute;top:-2px;right:-4px;min-width:16px;height:16px;padding:0 4px;background:var(--danger);color:#fff;border-radius:999px;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center}
.badge.sm{position:static;margin-left:6px;min-width:14px;height:14px;font-size:10px}
/* 小尺寸表单（授权下拉等） */
.t.sm{padding:5px 8px;font-size:12px;width:auto}
/* 视频处理排队提示 */
.pending{background:#1e293b;color:#e2e8f0;border-radius:10px;padding:14px;line-height:1.7;font-size:13px}