* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif; background: #f5f7fa; color: #333; }
a { color: #FF6B35; text-decoration: none; }

/* 登录页 */
.login-page { display: flex; justify-content: center; align-items: center; min-height: 100vh; background: linear-gradient(135deg, #FF6B35 0%, #ff8c5a 100%); }
.login-card { background: #fff; border-radius: 12px; padding: 40px; width: 400px; max-width: 92vw; box-shadow: 0 10px 40px rgba(0,0,0,0.15); }
.login-card h2 { text-align: center; color: #FF6B35; margin-bottom: 8px; font-size: 24px; }
.login-card .subtitle { text-align: center; color: #999; margin-bottom: 30px; font-size: 14px; }
.login-card .form-group { margin-bottom: 20px; }
.login-card label { display: block; margin-bottom: 6px; font-size: 14px; color: #666; }
.login-card input { width: 100%; padding: 10px 14px; border: 1px solid #ddd; border-radius: 6px; font-size: 14px; outline: none; transition: border-color 0.3s; }
.login-card input:focus { border-color: #FF6B35; }
.login-card .btn-login { width: 100%; padding: 12px; background: #FF6B35; color: #fff; border: none; border-radius: 6px; font-size: 16px; cursor: pointer; transition: background 0.3s; }
.login-card .btn-login:hover { background: #e55a2b; }
.login-card .error-msg { color: #e74c3c; font-size: 13px; margin-top: 10px; text-align: center; }

/* 管理后台布局 */
.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #2c3e50; color: #fff; flex-shrink: 0; }
.sidebar .logo { padding: 20px; font-size: 18px; font-weight: bold; border-bottom: 1px solid #3d5266; text-align: center; }
.sidebar .logo span { color: #FF6B35; }
.sidebar .nav-item { display: block; padding: 14px 20px; color: #bdc3c7; font-size: 14px; transition: all 0.3s; border-left: 3px solid transparent; }
.sidebar .nav-item:hover, .sidebar .nav-item.active { color: #fff; background: #34495e; border-left-color: #FF6B35; }
.main-content { flex: 1; display: flex; flex-direction: column; }
.topbar { background: #fff; padding: 0 24px; height: 56px; display: flex; align-items: center; justify-content: flex-end; border-bottom: 1px solid #e8e8e8; box-shadow: 0 1px 4px rgba(0,0,0,0.05); }
.topbar .user-info { font-size: 14px; color: #666; }
.topbar .btn-logout { margin-left: 16px; padding: 6px 16px; background: #e74c3c; color: #fff; border: none; border-radius: 4px; cursor: pointer; font-size: 13px; }
.page-content { padding: 24px; flex: 1; overflow-y: auto; }

/* 统计卡片 */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 24px; }
.stat-card { background: #fff; border-radius: 8px; padding: 20px; box-shadow: 0 1px 6px rgba(0,0,0,0.06); }
.stat-card .stat-icon { font-size: 32px; margin-bottom: 8px; }
.stat-card .stat-value { font-size: 28px; font-weight: bold; color: #333; margin-bottom: 4px; }
.stat-card .stat-label { font-size: 13px; color: #999; }

/* 页面标题 */
.page-title { font-size: 20px; font-weight: bold; margin-bottom: 20px; color: #333; }

/* 卡片 */
.card { background: #fff; border-radius: 8px; padding: 20px; box-shadow: 0 1px 6px rgba(0,0,0,0.06); margin-bottom: 20px; overflow-x: auto; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.card-header h3 { font-size: 16px; color: #333; }

/* 搜索栏 */
.search-bar { display: flex; gap: 10px; margin-bottom: 20px; flex-wrap: wrap; align-items: center; }
.search-bar input, .search-bar select { padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; outline: none; }
.search-bar input:focus, .search-bar select:focus { border-color: #FF6B35; }

/* 按钮 */
.btn { padding: 8px 16px; border: none; border-radius: 4px; font-size: 14px; cursor: pointer; transition: all 0.3s; display: inline-block; }
.btn-primary { background: #FF6B35; color: #fff; }
.btn-primary:hover { background: #e55a2b; }
.btn-success { background: #27ae60; color: #fff; }
.btn-success:hover { background: #219a52; }
.btn-warning { background: #f39c12; color: #fff; }
.btn-info { background: #3498db; color: #fff; }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-danger:hover { background: #c0392b; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-outline { background: #fff; color: #FF6B35; border: 1px solid #FF6B35; }
.btn-outline:hover { background: #FF6B35; color: #fff; }

/* 表格 */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 12px; text-align: left; border-bottom: 1px solid #f0f0f0; font-size: 14px; }
.table th { background: #fafafa; font-weight: 600; color: #666; }
.table tr:hover { background: #fafafa; }
.table .img-thumb { width: 60px; height: 60px; object-fit: cover; border-radius: 4px; }
.table td:last-child { white-space: nowrap; }
.table td .btn { margin-right: 6px; }
.table td .btn:last-child { margin-right: 0; }

/* 标签 */
.tag { display: inline-block; padding: 2px 8px; border-radius: 3px; font-size: 12px; }
.tag-success { background: #e8f5e9; color: #27ae60; }
.tag-warning { background: #fff3e0; color: #f39c12; }
.tag-danger { background: #fdecea; color: #e74c3c; }
.tag-info { background: #e3f2fd; color: #3498db; }
.tag-primary { background: #fff0eb; color: #FF6B35; }

/* 分页 */
.pagination { display: flex; gap: 6px; justify-content: center; margin-top: 20px; }
.pagination button { padding: 6px 12px; border: 1px solid #ddd; background: #fff; border-radius: 4px; cursor: pointer; font-size: 13px; }
.pagination button.active { background: #FF6B35; color: #fff; border-color: #FF6B35; }
.pagination button:disabled { opacity: 0.5; cursor: not-allowed; }

/* 表单 */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 14px; color: #666; font-weight: 500; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 14px; outline: none; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: #FF6B35; }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }

/* 规格行 */
.spec-row { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.spec-row input { flex: 1; }

/* 模态框 */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 1000; justify-content: center; align-items: center; }
.modal-overlay.show { display: flex; }
.modal-box { background: #fff; border-radius: 8px; padding: 24px; width: 500px; max-width: 90%; max-height: 80vh; overflow-y: auto; }
.modal-box h3 { margin-bottom: 20px; font-size: 18px; }

/* 空状态 */
.empty-state { text-align: center; padding: 40px; color: #999; }
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }

/* 响应式 */
@media (max-width: 1024px) {
    .stats-row { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .sidebar { width: 60px; overflow: hidden; }
    .sidebar .logo { font-size: 14px; padding: 10px; }
    .sidebar .logo span { display: none; }
    .sidebar .nav-item { padding: 12px 10px; font-size: 12px; text-align: center; white-space: nowrap; overflow: hidden; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr; }
}