:root{
  --primary:#4f46e5; --primary-dark:#4338ca;
  --bg:#f4f5fb; --card:#fff; --text:#1f2937; --muted:#6b7280;
  --border:#e5e7eb; --green:#10b981; --amber:#f59e0b; --red:#ef4444;
  --sidebar-bg:#0f172a;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:"Segoe UI","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
code{background:#eef2ff;padding:1px 6px;border-radius:4px;font-family:Consolas,monospace}

/* 布局 */
.layout{display:flex;min-height:100vh}
.sidebar{position:fixed;top:0;left:0;bottom:0;width:230px;background:var(--sidebar-bg);color:#cbd5e1;display:flex;flex-direction:column}
.brand{padding:20px 18px;font-size:17px;font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.08)}
.brand-logo{color:var(--primary);margin-right:6px}
.nav{display:flex;flex-direction:column;padding:12px 8px;gap:2px}
.nav a{color:#cbd5e1;padding:10px 12px;border-radius:8px;display:flex;align-items:center;gap:8px}
.nav a:hover{background:rgba(255,255,255,.06);text-decoration:none}
.nav a.active{background:var(--primary);color:#fff}
.main{margin-left:230px;flex:1;display:flex;flex-direction:column;min-width:0}
.topbar{height:60px;background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:5}
.topbar-title{font-size:16px;font-weight:600}
.topbar-user{display:flex;align-items:center;gap:10px;font-size:13px}
.logout-form{display:inline}
.content{padding:24px;flex:1}

/* 提示 */
.flash{background:#eef2ff;border:1px solid #c7d2fe;color:#3730a3;padding:10px 14px;border-radius:8px;margin-bottom:16px}
.flash-error{background:#fef2f2;border-color:#fecaca;color:#991b1b}

/* KPI */
.kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:20px}
.kpi-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px 20px}
.kpi-card.accent{border-top:3px solid var(--primary)}
.kpi-card.accent2{border-top:3px solid var(--green)}
.kpi-card.accent3{border-top:3px solid var(--amber)}
.kpi-label{color:var(--muted);font-size:13px}
.kpi-value{font-size:26px;font-weight:700;margin:6px 0}
.kpi-sub{font-size:12px;color:var(--muted)}

/* 面板与图表 */
.panels{display:grid;grid-template-columns:1.6fr 1fr;gap:16px;margin-bottom:20px}
.panel{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin-bottom:20px}
.panel h3{margin:0 0 14px;font-size:15px}
.chart-wrap{height:260px;position:relative}

/* 表格 */
.table{width:100%;border-collapse:collapse;background:var(--card);border-radius:12px;overflow:hidden}
.table th,.table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border);font-size:13px}
.table thead th{background:#f9fafb;color:var(--muted);font-weight:600;font-size:12px}
.table tbody tr:hover{background:#f9fafb}
.row-dim{opacity:.55}
.empty,.muted{color:var(--muted);text-align:center}
.actions{display:flex;gap:6px;align-items:center}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);background:var(--card);color:var(--text);padding:7px 14px;border-radius:8px;cursor:pointer;font-size:13px;text-decoration:none}
.btn:hover{background:#f3f4f6;text-decoration:none}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:transparent}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-block{width:100%;justify-content:center}

/* 徽章 */
.badge{display:inline-block;padding:2px 8px;border-radius:10px;font-size:12px;background:#e5e7eb;color:#374151}
.badge-admin{background:#eef2ff;color:#3730a3}
.badge-agent{background:#ecfdf5;color:#065f46}
.badge-active{background:#dcfce7;color:#166534}
.badge-suspended{background:#fee2e2;color:#991b1b}
.badge-level-1{background:#eef2ff;color:#3730a3}
.badge-level-2{background:#fef3c7;color:#92400e}
.badge-level-3{background:#e0f2fe;color:#075985}
.badge-role-self{background:#dcfce7;color:#166534}
.badge-role-parent{background:#eef2ff;color:#3730a3}
.badge-role-grandparent{background:#fef3c7;color:#92400e}
.rank{display:inline-flex;width:22px;height:22px;border-radius:50%;background:var(--primary);color:#fff;align-items:center;justify-content:center;font-size:12px}

/* 页面工具栏与筛选 */
.page-actions{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap}
.filter-bar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:12px;margin-bottom:16px}
.filter-bar input,.filter-bar select{padding:7px 10px;border:1px solid var(--border);border-radius:8px;font-size:13px}
.field-inline{display:flex;align-items:center;gap:8px;font-size:13px}
.summary-bar{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:12px 16px;margin-bottom:16px;font-size:14px}

/* 表单 */
.form-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:22px;max-width:760px}
.form-row{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.field{display:flex;flex-direction:column;gap:6px;flex:1;min-width:200px}
.field span{font-size:13px;color:#374151}
.field input,.field select{padding:8px 10px;border:1px solid var(--border);border-radius:8px;font-size:13px}
.readonly{padding:8px 10px;background:#f9fafb;border:1px solid var(--border);border-radius:8px;color:var(--muted);font-size:12px}
.form-actions{display:flex;gap:10px;margin-top:8px}
.form-hint{margin-top:12px;font-size:12px;color:var(--muted)}

/* 佣金预览 */
.preview-panel{margin-top:20px;border:1px dashed var(--border);border-radius:10px;padding:16px;background:#fafbff}
.preview-panel h3{margin:0 0 12px;font-size:14px}
.preview-total{margin-top:10px;text-align:right;font-size:15px}

/* 层级树 */
.tree,.tree ul{list-style:none;margin:0;padding:0}
.tree{padding-left:0}
.tree ul{padding-left:26px;border-left:1px dashed var(--border);margin-left:8px}
.tree-node{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:8px;padding:8px 12px;margin:6px 0}
.tree-code{font-weight:700}
.tree-rate{color:var(--muted);font-size:12px}
.tree-region{color:var(--primary);font-size:12px}

/* 登录页 */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#4f46e5,#0f172a)}
.login-card{background:#fff;border-radius:16px;padding:36px 32px;width:360px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.login-title{margin:0 0 4px;font-size:22px;color:var(--primary)}
.login-sub{margin:0 0 20px;color:var(--muted);font-size:13px}
.login-form{display:flex;flex-direction:column;gap:14px}
.login-form .field{min-width:0}
.login-hint{margin-top:18px;font-size:12px;color:var(--muted);text-align:center}

/* 返还申请状态徽章 */
.badge-return-pending{background:#fef3c7;color:#92400e}
.badge-return-approved{background:#eef2ff;color:#3730a3}
.badge-return-paid{background:#dcfce7;color:#166534}
.badge-return-rejected{background:#fee2e2;color:#991b1b}
.badge-return-confirmed{background:#dcfce7;color:#166534}

/* 分页 */
.pagination{display:flex;gap:6px;align-items:center;justify-content:center;margin:16px 0;flex-wrap:wrap}
.pagination a,.pagination span{padding:6px 12px;border:1px solid var(--border);border-radius:6px;font-size:13px}
.pagination a:hover{background:#f3f4f6;text-decoration:none}
.pagination .cur{background:var(--primary);color:#fff;border-color:var(--primary)}

/* 佣金账户卡片 */
.balance-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px 20px;margin-bottom:16px}
.balance-card h3{margin:0 0 14px;font-size:15px}
.balance-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px}
.b-item{display:flex;flex-direction:column;gap:4px}
.b-item strong{font-size:20px}
.b-available strong{color:var(--primary)}
.input-sm{padding:4px 8px;border:1px solid var(--border);border-radius:6px;font-size:12px;width:auto}
.batch-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:12px;margin-bottom:12px}
.batch-bar select,.batch-bar input{padding:5px 8px;border:1px solid var(--border);border-radius:6px;font-size:12px}
.checkbox-inline{display:inline-flex;align-items:center;gap:6px;font-size:13px;cursor:pointer}
.checkbox-inline input{width:auto}

/* 响应式 */
@media (max-width:900px){
  .sidebar{position:relative;width:100%}
  .main{margin-left:0}
  .panels{grid-template-columns:1fr}
  .form-row{flex-direction:column}
}