:root{
  --bg:#f5f6fa; --panel:#fff; --side:#1e2130; --side-hover:#2a2e42; --side-active:#3b82f6;
  --text:#1f2430; --muted:#7b8194; --border:#e6e8ef; --primary:#3b82f6; --primary-d:#2563eb;
  --ok:#10b981; --warn:#f59e0b; --danger:#ef4444; --radius:12px;
  --shadow:0 1px 3px rgba(16,24,40,.06),0 8px 24px -8px rgba(16,24,40,.10);
}
*{box-sizing:border-box;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(--primary);text-decoration:none}
a:hover{color:var(--primary-d)}
/* 布局 */
.layout{display:flex;min-height:100vh}
.side{width:216px;background:var(--side);color:#c9cede;flex:0 0 216px;display:flex;flex-direction:column;position:sticky;top:0;height:100vh}
.side .brand{display:flex;align-items:center;gap:10px;padding:18px 18px 14px;font-weight:700;color:#fff;font-size:15px;letter-spacing:.3px}
.side .brand .dot{width:9px;height:9px;border-radius:50%;background:var(--primary);box-shadow:0 0 12px var(--primary)}
.side nav{padding:6px 10px;overflow-y:auto;flex:1}
.side .grp{font-size:11px;color:#5f677d;padding:14px 8px 6px;letter-spacing:.6px}
.side a.item{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:8px;color:#c9cede;font-size:13.5px;margin-bottom:2px}
.side a.item:hover{background:var(--side-hover);color:#fff}
.side a.item.active{background:var(--primary);color:#fff}
.side .foot{padding:12px 16px;border-top:1px solid #2b2f45;font-size:12px;color:#6a7290}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:56px;background:var(--panel);border-bottom:1px solid var(--border);display:flex;align-items:center;
  justify-content:space-between;padding:0 20px;position:sticky;top:0;z-index:20}
.topbar h1{font-size:16px;font-weight:600}
.topbar .who{font-size:13px;color:var(--muted)}
.content{padding:20px;max-width:1400px;width:100%}
/* 卡片 */
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px}
.card>.hd{padding:14px 18px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px}
.card>.hd h2{font-size:14.5px;font-weight:600}
.card>.bd{padding:18px}
.grid{display:grid;gap:16px}
.grid.c4{grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.grid.c2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.stat{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.stat .lb{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:6px}
.stat .vl{font-size:26px;font-weight:700;margin-top:6px;letter-spacing:.5px}
.stat .sub{font-size:12px;color:var(--muted);margin-top:2px}
/* 表单 */
label{display:block;font-size:13px;margin-bottom:6px;color:#3d4453;font-weight:500}
input,select,textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:9px;font-size:13.5px;
  background:#fff;color:var(--text);outline:none;transition:.15s;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(59,130,246,.12)}
textarea{min-height:90px;resize:vertical}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>*{flex:1;min-width:160px}
.f{margin-bottom:14px}
.hint{font-size:12px;color:var(--muted);margin-top:5px}
/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 15px;border:1px solid transparent;border-radius:9px;
  font-size:13.5px;cursor:pointer;background:var(--primary);color:#fff;transition:.15s;white-space:nowrap;font-weight:500}
.btn:hover{background:var(--primary-d)}
.btn.sm{padding:5px 11px;font-size:12.5px}
.btn.ghost{background:#fff;color:var(--text);border-color:var(--border)}
.btn.ghost:hover{background:#f7f8fb}
.btn.ok{background:var(--ok)}.btn.ok:hover{background:#0e9f6e}
.btn.warn{background:var(--warn)}.btn.warn:hover{background:#d97706}
.btn.danger{background:var(--danger)}.btn.danger:hover{background:#dc2626}
.btn:disabled{opacity:.55;cursor:not-allowed}
.acts{display:flex;gap:6px;flex-wrap:wrap}
/* 表格 */
.tbl-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13.5px}
th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}
th{background:#fafbfd;color:#5a6178;font-weight:600;font-size:12.5px}
tbody tr:hover{background:#fafbfd}
td.wrap{white-space:normal;min-width:180px}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12.5px}
/* 徽章 */
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:500;line-height:1.7}
.b-ok{background:#e7f8f1;color:#0d7f5c}
.b-warn{background:#fff5e6;color:#b26a00}
.b-danger{background:#fdecec;color:#c62828}
.b-gray{background:#eef0f5;color:#5a6178}
.b-blue{background:#e8f1ff;color:#1d4ed8}
/* 分页 / 提示 / 弹窗 */
.pager{display:flex;gap:6px;align-items:center;padding:14px 18px;flex-wrap:wrap}
.pager a,.pager span{padding:5px 11px;border:1px solid var(--border);border-radius:8px;font-size:13px;background:#fff;color:var(--text)}
.pager .cur{background:var(--primary);color:#fff;border-color:var(--primary)}
.alert{padding:11px 15px;border-radius:10px;font-size:13.5px;margin-bottom:14px;border:1px solid transparent}
.a-ok{background:#e7f8f1;color:#0d7f5c;border-color:#bfe9d8}
.a-err{background:#fdecec;color:#c62828;border-color:#f8cfcf}
.a-warn{background:#fff5e6;color:#b26a00;border-color:#ffe1b0}
.a-info{background:#e8f1ff;color:#1d4ed8;border-color:#cfe0ff}
.modal{position:fixed;inset:0;background:rgba(17,20,28,.45);display:none;align-items:center;justify-content:center;z-index:60;padding:16px}
.modal.on{display:flex}
.modal .box{background:#fff;border-radius:14px;width:100%;max-width:520px;max-height:88vh;overflow:auto;box-shadow:0 24px 64px -16px rgba(16,24,40,.35)}
.modal .box .hd{padding:15px 18px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-weight:600}
.modal .box .bd{padding:18px}
.modal .box .ft{padding:14px 18px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:8px}
.x{cursor:pointer;color:var(--muted);font-size:20px;line-height:1;background:none;border:0}
/* 登录页 */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px;
  background:linear-gradient(135deg,#1e2130 0%,#2b3350 55%,#3b82f6 140%)}
.login-box{width:100%;max-width:380px;background:#fff;border-radius:16px;padding:30px 28px;box-shadow:0 30px 70px -20px rgba(0,0,0,.45)}
.login-box h1{font-size:19px;margin-bottom:4px}
.login-box p.sub{color:var(--muted);font-size:13px;margin-bottom:22px}
/* 前台 */
.site-nav{background:#fff;border-bottom:1px solid var(--border);padding:0 20px;height:60px;display:flex;align-items:center;justify-content:space-between}
.site-nav .logo{font-weight:700;font-size:16px;display:flex;align-items:center;gap:8px}
.site-body{max-width:960px;margin:0 auto;padding:28px 18px 60px}
.hero{text-align:center;padding:38px 10px 26px}
.hero h1{font-size:27px;margin-bottom:10px}
.hero p{color:var(--muted);font-size:14.5px}
.tabs{display:flex;gap:6px;margin-bottom:16px;border-bottom:1px solid var(--border)}
.tabs button{background:none;border:0;padding:10px 16px;font-size:14px;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent}
.tabs button.on{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.toast{position:fixed;right:20px;bottom:20px;background:#1f2430;color:#fff;padding:11px 17px;border-radius:10px;
  font-size:13.5px;opacity:0;transform:translateY(8px);transition:.25s;z-index:99;max-width:340px}
.toast.on{opacity:1;transform:none}
.empty{text-align:center;color:var(--muted);padding:38px 10px;font-size:13.5px}
@media(max-width:860px){
  .side{position:fixed;left:-220px;transition:.25s;z-index:50}
  .side.open{left:0}
  .content{padding:14px}
}