*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI","Microsoft YaHei",sans-serif;background:#eef1f5;color:#222}
a{color:#1a6fb5;text-decoration:none}
.layout{display:flex;min-height:100vh}
.side{width:220px;background:#1e293b;color:#fff;padding:20px 0;flex-shrink:0}
.brand{padding:0 20px 20px;font-weight:700;font-size:16px;border-bottom:1px solid #334155}
.side nav a{display:block;padding:12px 20px;color:#cbd5e1}
.side nav a:hover{background:#334155;color:#fff}
.main{flex:1;padding:24px 28px}
h1{margin:0 0 18px;font-size:22px}
.card{background:#fff;border-radius:8px;padding:16px 18px;box-shadow:0 1px 4px rgba(0,0,0,.05);margin-bottom:16px}
.stats{display:flex;gap:12px;flex-wrap:wrap}
.stat{flex:1;min-width:140px;background:#fff;border-radius:8px;padding:16px;box-shadow:0 1px 4px rgba(0,0,0,.05)}
.stat b{display:block;font-size:24px;margin-top:6px}
table{width:100%;border-collapse:collapse;background:#fff;border-radius:8px;overflow:hidden}
th,td{padding:10px 12px;border-bottom:1px solid #eee;text-align:left;font-size:14px}
th{background:#f8fafc;color:#475569}
.btn{display:inline-block;background:#1a6fb5;color:#fff;padding:7px 12px;border-radius:4px;border:0;cursor:pointer;font-size:13px}
.btn-secondary{background:#64748b}
.btn-danger{background:#b91c1c}
.btn-sm{padding:4px 8px;font-size:12px}
.toolbar{margin-bottom:12px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
label{display:block;margin:10px 0 4px;font-size:13px;color:#334155}
input,select,textarea{width:100%;max-width:480px;padding:8px 10px;border:1px solid #cbd5e1;border-radius:4px}
.form-row{margin-bottom:4px}
.msg{padding:10px;border-radius:4px;margin-bottom:12px}
.msg-ok{background:#ecfdf5;color:#065f46}
.msg-err{background:#fef2f2;color:#991b1b}
.tag{display:inline-block;padding:2px 8px;border-radius:999px;font-size:12px}
.tag-on{background:#dcfce7;color:#166534}
.tag-off{background:#fee2e2;color:#991b1b}
.login-wrap{max-width:380px;margin:80px auto;background:#fff;padding:28px;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.hint{color:#64748b;font-size:13px}
code{background:#f1f5f9;padding:1px 5px;border-radius:3px;font-size:12px}
@media(max-width:800px){.layout{flex-direction:column}.side{width:100%}}