* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif; background: #f4f6f9; color: #1f2937; font-size: 14px; }
a { color: #2563eb; text-decoration: none; }
a:hover { text-decoration: underline; }

/* 登录页 */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #1e3a8a, #3b82f6); }
.login-box { background: #fff; padding: 36px; border-radius: 12px; width: 340px; box-shadow: 0 20px 50px rgba(0,0,0,.25); }
.login-box h1 { font-size: 20px; margin: 0 0 4px; text-align: center; }
.login-sub { text-align: center; color: #6b7280; margin: 0 0 20px; }
.login-box label { display: block; margin: 12px 0 4px; color: #374151; }
.login-box input { width: 100%; padding: 10px; border: 1px solid #d1d5db; border-radius: 6px; }

/* 布局 */
.topbar { height: 54px; background: #1e3a8a; color: #fff; display: flex; align-items: center; justify-content: space-between; padding: 0 20px; position: sticky; top: 0; z-index: 10; }
.brand { font-weight: 700; font-size: 16px; }
.topbar-right .user { margin-right: 12px; opacity: .9; }
.topbar-right .link { color: #bfdbfe; }
.layout { display: flex; min-height: calc(100vh - 54px); }
.sidebar { width: 200px; background: #fff; border-right: 1px solid #e5e7eb; padding: 12px 0; flex-shrink: 0; }
.sidebar a { display: block; padding: 12px 20px; color: #374151; font-weight: 500; }
.sidebar a:hover { background: #f3f4f6; text-decoration: none; }
.sidebar a.active { background: #eff6ff; color: #1d4ed8; border-right: 3px solid #2563eb; }
.content { flex: 1; padding: 24px; overflow-x: auto; }

/* 卡片/统计 */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.card { background: #fff; border-radius: 10px; padding: 18px; border: 1px solid #e5e7eb; }
.card .num { font-size: 28px; font-weight: 700; color: #1d4ed8; }
.card .label { color: #6b7280; margin-top: 4px; }

/* 面板 */
.panel { background: #fff; border-radius: 10px; border: 1px solid #e5e7eb; padding: 20px; margin-bottom: 20px; }
.panel h2 { margin: 0 0 16px; font-size: 16px; }
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }

/* 表格 */
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid #eef0f3; }
th { background: #f9fafb; color: #6b7280; font-weight: 600; white-space: nowrap; }
tr:hover td { background: #fafbff; }

/* 按钮/标签 */
.btn { display: inline-block; padding: 8px 14px; border-radius: 6px; border: 1px solid #d1d5db; background: #fff; cursor: pointer; font-size: 14px; color: #374151; }
.btn:hover { background: #f3f4f6; }
.btn-primary { background: #2563eb; color: #fff; border-color: #2563eb; }
.btn-primary:hover { background: #1d4ed8; }
.btn-danger { background: #dc2626; color: #fff; border-color: #dc2626; }
.btn-sm { padding: 4px 8px; font-size: 12px; }
.btn-block { width: 100%; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; background: #e5e7eb; color: #374151; margin-right: 4px; }
.tag-yes { background: #dcfce7; color: #166534; }
.tag-no { background: #f3f4f6; color: #9ca3af; }
.tag-warn { background: #fef3c7; color: #92400e; }

/* 表单 */
.form-row { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 12px; }
.form-item { flex: 1 1 240px; }
.form-item label { display: block; margin-bottom: 4px; color: #6b7280; font-size: 12px; }
.form-item input, .form-item select, .form-item textarea { width: 100%; padding: 8px; border: 1px solid #d1d5db; border-radius: 6px; font-size: 14px; }

/* 提示 */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-info { background: #dbeafe; color: #1e40af; }

.pagination { margin-top: 16px; display: flex; gap: 6px; }
.pagination a, .pagination span { padding: 6px 12px; border: 1px solid #d1d5db; border-radius: 6px; }
.pagination .cur { background: #2563eb; color: #fff; border-color: #2563eb; }
.muted { color: #9ca3af; }
.mono { font-family: monospace; }