/* ========== 全局样式 ========== */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #64748b;
    --success: #16a34a;
    --warning: #ea580c;
    --danger: #dc2626;
    --info: #0891b2;
    --bg: #f1f5f9;
    --bg-alt: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --shadow: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.10);
    --radius: 6px;
    --radius-lg: 10px;
}

body {
    font-family: -apple-system, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
    overflow: hidden;
}

/* ========== 顶部栏 ========== */
.topbar {
    height: 56px;
    background: linear-gradient(135deg, var(--primary), #1e40af);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 100;
}
.topbar-left { display: flex; align-items: center; gap: 14px; }
.topbar h1 { font-size: 17px; font-weight: 600; letter-spacing: 0.5px; }
.hamburger {
    background: none; border: none; color: #fff;
    font-size: 20px; cursor: pointer; padding: 4px 8px;
}
.topbar-right { display: flex; align-items: center; gap: 14px; font-size: 13px; }
.topbar-right a { color: #fff; text-decoration: none; opacity: 0.85; }

/* ========== 主布局 ========== */
.main-layout {
    display: flex;
    height: calc(100vh - 56px);
}

/* ========== 侧栏 ========== */
.sidebar {
    width: 220px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    transition: margin-left 0.2s;
}
.sidebar.collapsed { margin-left: -220px; }
.sidebar nav ul { list-style: none; padding: 8px 0; }
.menu-group { padding: 6px 0; }
.menu-group-title {
    padding: 8px 18px 4px;
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.sidebar nav ul ul { padding: 0; }
.sidebar nav a {
    display: flex;
    align-items: center;
    padding: 9px 20px 9px 28px;
    color: var(--text);
    text-decoration: none;
    font-size: 13.5px;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}
.sidebar nav a:hover {
    background: var(--bg-alt);
    color: var(--primary);
}
.sidebar nav a.active {
    background: var(--primary-light);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 600;
}
.sidebar .ico { margin-right: 10px; font-size: 16px; }

/* ========== 内容区 ========== */
.content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: var(--bg);
}

.page-loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

/* ========== 卡片 ========== */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}
.card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.card-title .actions { display: flex; gap: 8px; }

/* ========== 统计卡片（仪表盘）========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}
.stat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}
.stat-card .stat-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 6px;
}
.stat-card .stat-value {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
}
.stat-card .stat-sub {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}
.stat-card.green { border-left-color: var(--success); }
.stat-card.orange { border-left-color: var(--warning); }
.stat-card.red { border-left-color: var(--danger); }
.stat-card.cyan { border-left-color: var(--info); }

/* ========== 表单 ========== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
}
.form-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.form-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.form-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

.form-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}
.form-row label {
    min-width: 90px;
    color: var(--text-light);
    font-size: 13px;
}
.form-row .req::before {
    content: '*';
    color: var(--danger);
    margin-right: 4px;
}

.form-group {
    display: flex;
    flex-direction: column;
}
.form-group label {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 4px;
    font-weight: 500;
}
.form-group label .req { color: var(--danger); margin-right: 3px; }

input[type="text"], input[type="number"], input[type="date"], input[type="datetime-local"],
input[type="email"], input[type="tel"], select, textarea {
    width: 100%;
    padding: 7px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13.5px;
    font-family: inherit;
    background: var(--surface);
    transition: all 0.15s;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.10);
}
textarea { min-height: 70px; resize: vertical; }

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}
.btn:hover {
    background: var(--bg-alt);
    border-color: var(--secondary);
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); }

.btn-success { background: var(--success); color: #fff; border-color: var(--success); }
.btn-success:hover { background: #15803d; border-color: #15803d; }

.btn-warning { background: var(--warning); color: #fff; border-color: var(--warning); }
.btn-warning:hover { background: #c2410c; border-color: #c2410c; }

.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; }

.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 10px 20px; font-size: 15px; }
.btn-block { display: flex; width: 100%; justify-content: center; }

.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }

/* ========== 表格 ========== */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface);
}
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
table.data-table th {
    background: var(--bg-alt);
    padding: 10px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-light);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
    position: sticky;
    top: 0;
    z-index: 5;
}
table.data-table td {
    padding: 9px 12px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}
table.data-table tbody tr:hover {
    background: var(--bg-alt);
}
table.data-table tbody tr.selected {
    background: var(--primary-light);
}
table.data-table .actions {
    display: flex;
    gap: 4px;
    white-space: nowrap;
}
table.data-table .num { text-align: right; font-variant-numeric: tabular-nums; }

.empty-tip {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

/* ========== 筛选栏 ========== */
.filter-bar {
    background: var(--surface);
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-end;
}
.filter-bar .filter-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.filter-bar .filter-item label {
    font-size: 11px;
    color: var(--text-muted);
}
.filter-bar .filter-item input,
.filter-bar .filter-item select {
    min-width: 140px;
}
.filter-bar .filter-btns {
    margin-left: auto;
    display: flex;
    gap: 6px;
}

/* ========== 状态徽章 ========== */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}
.badge-pending { background: #fef3c7; color: #92400e; }
.badge-paid { background: #dcfce7; color: #15803d; }
.badge-shipped { background: #dbeafe; color: #1d4ed8; }
.badge-completed { background: #ede9fe; color: #6d28d9; }
.badge-cancelled { background: #fee2e2; color: #b91c1c; }

/* ========== 分页 ========== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    font-size: 13px;
}
.pagination .pages { display: flex; gap: 4px; }
.pagination button {
    padding: 4px 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    cursor: pointer;
    border-radius: var(--radius);
    font-size: 12px;
}
.pagination button.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

/* ========== 模态框 ========== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal {
    background: var(--surface);
    border-radius: var(--radius-lg);
    min-width: 480px;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}
.modal-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 { font-size: 16px; font-weight: 600; }
.modal-close {
    background: none; border: none; font-size: 22px;
    color: var(--text-muted); cursor: pointer; padding: 0; line-height: 1;
}
.modal-body {
    padding: 18px 20px;
    overflow-y: auto;
    flex: 1;
}
.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ========== Toast ========== */
#toast-container {
    position: fixed;
    top: 80px; right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.toast {
    background: var(--surface);
    padding: 10px 18px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary);
    min-width: 240px;
    animation: slideIn 0.2s ease-out;
}
.toast.success { border-left-color: var(--success); }
.toast.warning { border-left-color: var(--warning); }
.toast.error { border-left-color: var(--danger); }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ========== 工具栏 ========== */
.toolbar {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

/* ========== 标签页 ========== */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    margin-bottom: 16px;
}
.tabs .tab {
    padding: 9px 18px;
    cursor: pointer;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    font-size: 14px;
    transition: all 0.15s;
}
.tabs .tab:hover { color: var(--primary); }
.tabs .tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

/* ========== 模板编辑器 ========== */
.code-editor {
    width: 100%;
    min-height: 400px;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: "Consolas", "Microsoft YaHei", monospace;
    font-size: 13px;
    background: #fafafa;
    white-space: pre;
    overflow: auto;
}

/* ========== 响应式 ========== */
@media (max-width: 900px) {
    .sidebar { position: absolute; z-index: 99; height: calc(100vh - 56px); }
    .sidebar.collapsed { margin-left: -220px; }
    .form-grid.cols-4, .form-grid.cols-3 { grid-template-columns: 1fr 1fr; }
}

/* ========== 字段配置拖拽 ========== */
.field-item {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 6px;
    background: var(--surface);
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: move;
}
.field-item:hover { background: var(--bg-alt); }
.field-item.dragging { opacity: 0.4; }
.field-item .handle { color: var(--text-muted); cursor: grab; }
.field-item .name { font-weight: 600; min-width: 100px; }
.field-item .label { color: var(--text-light); flex: 1; }
.field-item .type { font-size: 11px; padding: 1px 6px; background: var(--bg-alt); border-radius: 4px; color: var(--text-muted); }

/* ========== 帮助文本 ========== */
.help-text {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
    line-height: 1.5;
}

/* ========== 复选框 ========== */
.checkbox-row {
    display: flex;
    align-items: center;
    gap: 6px;
}
.checkbox-row input[type=checkbox] { width: auto; }

/* ========== 进度条 / 加载 ========== */
.spinner {
    width: 32px; height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 20px auto;
}
@keyframes spin { to { transform: rotate(360deg); } }