/* ============ 后台管理样式 ============ */
:root{
  --primary:#4f46e5;
  --sidebar-w:220px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:#f3f4f6;color:#1f2937;font-size:14px;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

.admin-layout{display:flex;min-height:100vh}

/* 侧边栏 */
.sidebar{
  width:var(--sidebar-w);background:linear-gradient(180deg,#1e1b4b,#312e81);color:#fff;
  position:fixed;top:0;left:0;bottom:0;overflow-y:auto;z-index:100;
}
.sidebar .brand{padding:20px 18px;font-size:18px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;gap:8px}
.sidebar .nav{padding:12px 0}
.sidebar .nav a{display:flex;align-items:center;gap:10px;padding:11px 22px;color:rgba(255,255,255,.78);font-size:14px;transition:.2s;border-left:3px solid transparent}
.sidebar .nav a:hover{background:rgba(255,255,255,.08);color:#fff}
.sidebar .nav a.active{background:rgba(255,255,255,.12);color:#fff;border-left-color:#a78bfa}
.sidebar .nav .ico{font-size:16px;width:20px;text-align:center}

/* 主区域 */
.admin-main{margin-left:var(--sidebar-w);flex:1;min-width:0}
.admin-header{
  background:#fff;height:56px;display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;box-shadow:0 1px 3px rgba(0,0,0,.05);position:sticky;top:0;z-index:50;
}
.admin-header h1{font-size:17px;font-weight:600}
.admin-header .right{display:flex;align-items:center;gap:14px}
.admin-header .right a{font-size:13px;color:#6b7280}
.admin-header .right a:hover{color:var(--primary)}
.admin-content{padding:24px}

/* 卡片 */
.card{background:#fff;border-radius:10px;padding:18px;margin-bottom:16px;box-shadow:0 1px 3px rgba(0,0,0,.06)}
.card h3{font-size:16px;margin-bottom:12px}

/* 统计卡片 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}
.stat-card{background:#fff;border-radius:12px;padding:18px;box-shadow:0 1px 3px rgba(0,0,0,.06);border-left:4px solid var(--primary)}
.stat-card .label{color:#6b7280;font-size:13px}
.stat-card .value{font-size:26px;font-weight:700;margin-top:6px;color:#111827}
.stat-card .icon{float:right;font-size:30px;opacity:.3}
.stat-card.green{border-left-color:#16a34a}
.stat-card.orange{border-left-color:#f59e0b}
.stat-card.pink{border-left-color:#ec4899}

/* 表格 */
table{width:100%;border-collapse:collapse;background:#fff;border-radius:10px;overflow:hidden}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid #f3f4f6;font-size:13px}
th{background:#f9fafb;font-weight:600;color:#374151;font-size:12px;text-transform:uppercase;letter-spacing:.5px}
tr:hover{background:#fafbff}
td img.thumb{width:50px;height:50px;border-radius:6px;object-fit:cover}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:5px;padding:7px 16px;border-radius:6px;font-size:13px;font-weight:500;border:none;cursor:pointer;background:var(--primary);color:#fff;transition:.2s;text-decoration:none}
.btn:hover{background:#4338ca}
.btn-sm{padding:5px 11px;font-size:12px}
.btn-lg{padding:11px 24px;font-size:15px}
.btn-block{display:flex;width:100%;justify-content:center}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-gray{background:#e5e7eb;color:#374151}
.btn-gray:hover{background:#d1d5db}
.btn-success{background:#16a34a}
.btn-success:hover{background:#15803d}
.btn-danger{background:#dc2626}
.btn-danger:hover{background:#b91c1c}
.btn-warn{background:#f59e0b}

/* 表单 */
.form-group{margin-bottom:14px}
.form-group label{display:block;font-weight:600;margin-bottom:5px;font-size:13px;color:#374151}
.form-control{width:100%;padding:9px 12px;border:1.5px solid #e5e7eb;border-radius:6px;font-size:14px;background:#fff;transition:.2s}
.form-control:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.1)}
textarea.form-control{min-height:80px;resize:vertical}

/* 状态徽章 */
.badge{display:inline-block;padding:3px 9px;border-radius:10px;font-size:11px;font-weight:600}
.b-0{background:#fef3c7;color:#92400e}.b-1{background:#dbeafe;color:#1e40af}
.b-2{background:#e0e7ff;color:#3730a3}.b-3{background:#fce7f3;color:#9d174d}
.b-4{background:#dcfce7;color:#166534}.b-5{background:#f1f5f9;color:#475569}

/* 工具栏 */
.toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:10px}
.toolbar .filters{display:flex;gap:8px;flex-wrap:wrap}
.toolbar .filters a{padding:5px 12px;border-radius:6px;background:#fff;border:1px solid #e5e7eb;font-size:13px;color:#6b7280}
.toolbar .filters a.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* 提示 */
.alert{padding:11px 15px;border-radius:8px;margin-bottom:12px;font-size:13px}
.alert-success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}
.alert-danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.alert-warning{background:#fffbeb;color:#92400e;border:1px solid #fde68a}
.alert-info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}

.empty{text-align:center;padding:40px 20px;color:#9ca3af}
.empty .icon{font-size:48px;opacity:.5;margin-bottom:10px}

/* 分页 */
.pagination{text-align:center;margin-top:18px}
.pagination a,.pagination span{display:inline-block;padding:6px 12px;margin:0 2px;border-radius:6px;background:#fff;border:1px solid #e5e7eb;font-size:13px}
.pagination a:hover{background:#f3f4f6}
.pagination .active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* 登录页 */
.login-wrap{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#4f46e5,#7c3aed)}
.login-box{background:#fff;border-radius:14px;padding:36px;max-width:380px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,.2)}
.login-box h1{text-align:center;margin-bottom:6px;font-size:22px}
.login-box .sub{text-align:center;color:#6b7280;margin-bottom:22px;font-size:13px}

/* 响应式 */
.mobile-toggle{display:none}
@media (max-width:768px){
  .sidebar{transform:translateX(-100%);transition:.3s}
  .sidebar.open{transform:translateX(0)}
  .admin-main{margin-left:0}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .mobile-toggle{display:inline-block}
  .admin-content{padding:14px}
  table{font-size:12px}
  th,td{padding:8px 10px}
  .hide-mobile{display:none}
}