:root {
            --pri: #6366f1;
            --pri-l: #818cf8;
            --pri-d: #4f46e5;
            --pri-bg: rgba(99, 102, 241, 0.1);
            --ok: #10b981;
            --warn: #f59e0b;
            --err: #ef4444;
            --bg: #fafafa;
            --card: #ffffff;
            --line: #e5e7eb;
            --t1: #111827;
            --t2: #4b5563;
            --t3: #9ca3af;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
            --shadow: 0 2px 8px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
            color-scheme: light dark;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--t1);
            line-height: 1.6;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        .app-container {
            display: flex;
            width: 100%;
            height: 100vh;
            overflow: hidden;
        }
        /* ========== Left Sidebar ========== */
        .sidebar {
            width: 230px;
            min-width: 230px;
            height: 100%;
            background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
            border-right: 1px solid #e2e8f0;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            transition: transform 0.3s ease, width 0.3s ease;
        }
        .sidebar-header {
            padding: 20px 18px 16px;
            border-bottom: 1px solid #e2e8f0;
            background: white;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 4px;
        }
        .sidebar-logo {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: linear-gradient(135deg, var(--pri), #8b5cf6);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 4px 12px rgba(99,102,241,0.25);
            flex-shrink: 0;
        }
        .sidebar-title {
            font-size: 17px;
            font-weight: 750;
            color: var(--t1);
            letter-spacing: -0.3px;
        }
        .sidebar-subtitle {
            font-size: 11.5px;
            color: var(--t3);
            margin-left: 46px;
            font-weight: 500;
        }
        .sidebar-search { padding: 14px 14px 10px; }
        .sidebar-search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            height: 34px;
            padding: 0 12px;
            border: 1.5px solid #e2e8f0;
            border-radius: 8px;
            background: white;
            transition: all 0.2s;
        }
        .sidebar-search-box:focus-within {
            border-color: var(--pri);
            box-shadow: 0 0 0 3px rgba(99,102,241,0.08);
        }
        .search-icon-xs { font-size: 13px; color: var(--t3); pointer-events: none; }
        .sidebar-search-box input {
            flex: 1; border: none; outline: none; background: transparent;
            font-size: 13px; color: var(--t1);
        }
        .sidebar-search-box input::placeholder { color: var(--t3); }

        .cat-nav {
            flex: 1; overflow-y: auto; overflow-x: hidden;
            padding: 4px 10px 12px; scrollbar-width: thin;
            scrollbar-color: rgba(99,102,241,0.15) transparent;
        }
        .cat-nav::-webkit-scrollbar { width: 5px; }
        .cat-nav::-webkit-scrollbar-track { background: transparent; }
        .cat-nav::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.12); border-radius: 10px; }

        .cat-nav-all {
            display: flex; align-items: center; gap: 10px;
            padding: 11px 13px; border-radius: 9px; cursor: pointer;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            margin-bottom: 4px; border: 2px solid transparent;
            position: relative; font-weight: 600; font-size: 13.5px; color: var(--t2);
        }
        .cat-nav-all:hover {
            background: white; border-color: #e2e8f0; transform: translateX(2px);
        }
        .cat-nav-all.active {
            background: linear-gradient(135deg, rgba(99,102,241,0.09), rgba(139,92,246,0.06));
            border-color: var(--pri); color: var(--pri-d);
            box-shadow: 0 2px 10px rgba(99,102,241,0.1);
        }
        .cat-nav-all.active::before {
            content: ''; position: absolute; left: -10px; top: 50%;
            transform: translateY(-50%); width: 3px; height: 60%;
            background: var(--pri); border-radius: 2px;
        }
        .nav-icon { font-size: 16px; width: 20px; text-align: center; }
        .nav-label { flex: 1; }
        .nav-badge {
            font-size: 11px; font-weight: 700; color: var(--t3);
            background: #e2e8f0; padding: 2px 8px; border-radius: 10px;
            min-width: 22px; text-align: center;
        }
        .cat-nav-all.active .nav-badge { background: rgba(99,102,241,0.15); color: var(--pri-d); }

        .cat-nav-favorites {
            display: flex; align-items: center; gap: 10px;
            padding: 11px 13px; border-radius: 9px; cursor: pointer;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            margin-bottom: 4px; border: 2px solid transparent;
            position: relative; font-weight: 600; font-size: 13.5px; color: var(--t2);
        }
        .cat-nav-favorites:hover {
            background: white; border-color: #fbbf24; transform: translateX(2px);
        }
        .cat-nav-favorites.active {
            background: linear-gradient(135deg, rgba(251,191,36,0.09), rgba(245,158,11,0.06));
            border-color: #f59e0b; color: #d97706;
            box-shadow: 0 2px 10px rgba(251,191,36,0.15);
        }
        .cat-nav-favorites.active::before {
            content: ''; position: absolute; left: -10px; top: 50%;
            transform: translateY(-50%); width: 3px; height: 60%;
            background: #f59e0b; border-radius: 2px;
        }
        .cat-nav-favorites.active .nav-badge { background: rgba(251,191,36,0.2); color: #d97706; }

        /* Category Group */
        .cat-nav-group { margin-bottom: 3px; position: relative; }
        .cat-nav-group.dragging { opacity: 0.5; }
        .cat-nav-group.drag-over::before {
            content: ''; position: absolute; left: 8px; right: 8px; top: -4px;
            height: 4px; background: var(--pri); border-radius: 2px;
            box-shadow: 0 2px 8px rgba(99,102,241,0.4);
        }
        .cat-nav-group.drag-over-bottom::after {
            content: ''; position: absolute; left: 8px; right: 8px; bottom: -4px;
            height: 4px; background: var(--pri); border-radius: 2px;
            box-shadow: 0 2px 8px rgba(99,102,241,0.4);
        }
        .cat-nav-l1 {
            display: flex; align-items: center; gap: 6px;
            padding: 10px 10px; border-radius: 9px; cursor: pointer;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            border: 2px solid transparent; background: white;
            user-select: none; position: relative;
        }
        .cat-nav-l1:hover {
            background: #fafbfc; border-color: #e2e8f0; transform: translateX(2px);
        }
        .cat-nav-l1.active {
            background: linear-gradient(135deg, rgba(99,102,241,0.09), rgba(139,92,246,0.06));
            border-color: var(--pri); box-shadow: 0 2px 10px rgba(99,102,241,0.1);
        }
        .cat-nav-l1.active::before {
            content: ''; position: absolute; left: -10px; top: 50%;
            transform: translateY(-50%); width: 3px; height: 60%;
            background: var(--pri); border-radius: 2px;
        }
        .nav-arrow {
            width: 16px; height: 16px; display: flex; align-items: center; justify-content: center;
            font-size: 9px; color: var(--t3); border-radius: 4px;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            flex-shrink: 0; cursor: grab;
        }
        .nav-arrow:active { cursor: grabbing; }
        .nav-arrow.expanded { transform: rotate(90deg); color: var(--pri); }
        .nav-arrow.no-child { visibility: hidden; }
        .drag-hint { display: none; }
        .nav-dot {
            width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
            box-shadow: 0 0 4px currentColor;
        }
        .nav-name {
            flex: 1; font-size: 13px; font-weight: 650; color: var(--t1);
            overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0;
        }
        .cat-nav-l1.active .nav-name { color: var(--pri-d); }
        .nav-count {
            font-size: 10.5px; font-weight: 700; color: var(--t3);
            background: #e2e8f0; padding: 1px 6px; border-radius: 10px; flex-shrink: 0;
        }
        .cat-nav-l1.active .nav-count { background: rgba(99,102,241,0.15); color: var(--pri-d); }

        /* L1 Action Buttons */
        .nav-l1-actions {
            display: flex; gap: 2px; opacity: 0; transition: opacity 0.15s; flex-shrink: 0;
        }
        .cat-nav-l1:hover .nav-l1-actions { opacity: 1; }
        .nav-action-btn {
            width: 22px; height: 22px; border: none; border-radius: 5px;
            background: transparent; cursor: pointer; font-size: 11px;
            color: var(--t3); display: flex; align-items: center; justify-content: center;
            transition: all 0.15s;
        }
        .nav-action-btn:hover { background: rgba(99,102,241,0.1); color: var(--pri); }
        .nav-action-btn.danger:hover { background: rgba(239,68,68,0.1); color: var(--err); }

        /* Children Container */
        .nav-children {
            max-height: 0; overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                        opacity 0.2s ease, margin 0.2s ease;
            opacity: 0; margin-left: 26px; padding-left: 12px;
            border-left: 2px solid #e2e8f0;
        }
        .nav-children.expanded { max-height: 400px; opacity: 1; margin-top: 3px; margin-bottom: 3px; }

        /* L2 Items */
        .cat-nav-l2 {
            display: flex; align-items: center; gap: 7px;
            padding: 8px 11px; border-radius: 7px; cursor: pointer;
            transition: all 0.15s; border: 1.5px solid transparent;
            background: #f8fafc; margin-bottom: 2px;
            font-size: 12.5px; font-weight: 550; color: var(--t2); position: relative;
        }
        .cat-nav-l2:last-child { margin-bottom: 0; }
        .cat-nav-l2:hover {
            background: white; border-color: rgba(99,102,241,0.12); transform: translateX(2px);
        }
        .cat-nav-l2:hover .nav-l1-actions { opacity: 1; }
        .cat-nav-l2.dragging { opacity: 0.4; }
        .cat-nav-l2.drag-over-sub { border-color: var(--pri); background: rgba(99,102,241,0.06); }
        .cat-nav-l2.active {
            background: linear-gradient(135deg, rgba(99,102,241,0.11), rgba(79,70,229,0.07));
            border-color: rgba(99,102,241,0.35); color: var(--pri-d); font-weight: 650;
            box-shadow: 0 1px 5px rgba(99,102,241,0.08);
        }
        .cat-nav-l2.active::before {
            content: ''; position: absolute; left: -15px; top: 50%;
            transform: translateY(-50%); width: 2.5px; height: 55%;
            background: var(--pri); border-radius: 2px;
        }
        .nav-dot-sm { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
        .nav-drag-sm {
            font-size: 10px; color: #d1d5db; cursor: grab;
            flex-shrink: 0; transition: color 0.15s;
        }
        .nav-drag-sm:hover { color: var(--pri); }
        .nav-drag-sm:active { cursor: grabbing; }
        .nav-name-sm { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12.5px; }
        .nav-count-sm {
            font-size: 10.5px; font-weight: 650; color: var(--t3);
            background: #e2e8f0; padding: 1px 7px; border-radius: 7px; flex-shrink: 0;
        }
        .cat-nav-l2.active .nav-count-sm { background: rgba(99,102,241,0.18); color: var(--pri-d); }

        /* Add Sub-category Row */
        .nav-add-sub {
            display: flex; align-items: center; gap: 5px;
            padding: 6px 11px 6px 24px; margin-top: 2px;
            font-size: 11.5px; font-weight: 600; color: var(--t3); cursor: pointer;
            border: 1.5px dashed #e2e8f0; border-radius: 7px; transition: all 0.15s;
        }
        .nav-add-sub:hover { border-color: var(--ok); color: var(--ok); background: rgba(16,185,129,0.03); }

        /* Sidebar Footer */
        .sidebar-footer { padding: 12px 14px; border-top: 1px solid #e2e8f0; background: white; }
        .add-cat-btn {
            width: 100%; height: 36px; border: 2px dashed #cbd5e1; border-radius: 8px;
            background: transparent; color: var(--t2); font-size: 13px; font-weight: 650;
            cursor: pointer; transition: all 0.2s;
            display: flex; align-items: center; justify-content: center; gap: 6px;
        }
        .add-cat-btn:hover { border-color: var(--pri); color: var(--pri); background: rgba(99,102,241,0.03); }

        /* Empty State in Sidebar */
        .sidebar-empty { text-align: center; padding: 30px 16px; color: var(--t3); }
        .sidebar-empty p { font-size: 13px; font-weight: 600; margin-bottom: 4px; }
        .sidebar-empty small { font-size: 11.5px; }

        /* Category Drop Zone (底部拖放) */
        .cat-drop-zone {
            display: flex; align-items: center; justify-content: center;
            padding: 10px; margin: 6px 0 4px; border: 2px dashed #e2e8f0;
            border-radius: 8px; font-size: 11.5px; font-weight: 600; color: var(--t3);
            cursor: default; transition: all 0.2s;
        }
        .cat-drop-zone.drag-over {
            border-color: var(--pri); color: var(--pri);
            background: rgba(99,102,241,0.06); font-weight: 700;
        }

        /* ========== Settings Modal ========== */
        .settings-dialog { width: 400px; }
        .modal-foot { background: #fafbfc; }
        .settings-section {
            padding: 14px; margin-bottom: 10px; border-radius: 10px;
            background: #f8fafc; border: 1px solid #e2e8f0;
        }
        .settings-section:last-child { margin-bottom: 0; }
        .settings-section-title {
            font-size: 15px; font-weight: 700; color: var(--t1); margin-bottom: 6px;
        }
        .settings-section-desc {
            font-size: 12.5px; color: var(--t3); line-height: 1.5;
        }
        .danger-zone { background: #fef2f2; border-color: #fecaca; }
        /* ========== Main Content Area ========== */
        .main-area {
            flex: 1; display: flex; flex-direction: column;
            overflow: hidden; background: var(--bg);
        }

        /* ========== Header ========== */
        .app-header {
            display: flex; align-items: center;
            justify-content: space-between;
            padding: 16px 28px;
            border-bottom: 1px solid var(--line);
            margin-bottom: 0; gap: 20px;
            flex-wrap: nowrap; background: white; min-height: 68px;
        }
        .app-actions { display: flex; gap: 10px; align-items: center; }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 0 16px; height: 36px; border: none;
            border-radius: var(--radius-sm); font-size: 13.5px;
            font-weight: 600; cursor: pointer;
            transition: all 0.15s ease; white-space: nowrap;
        }
        .btn:hover { transform: translateY(-1px); }
        .btn:active { transform: translateY(0); }
        .btn-primary {
            background: var(--pri); color: white;
            box-shadow: 0 2px 8px rgba(99,102,241,0.3);
        }
        .btn-primary:hover { box-shadow: 0 4px 12px rgba(99,102,241,0.4); }
        .btn-default {
            background: white; color: var(--t2); border: 1px solid var(--line);
        }
        .btn-default:hover { border-color: var(--pri); color: var(--pri); }
        .btn-danger {
            background: #fef2f2; color: var(--err);
            border: 1px solid transparent; font-size: 12.5px; height: 34px;
        }
        .btn-danger:hover { background: #fee2e2; }
        .theme-toggle {
            width: 36px; height: 36px; border: 1px solid var(--line);
            border-radius: var(--radius-sm); background: white;
            cursor: pointer; font-size: 16px;
            display: flex; align-items: center; justify-content: center;
            transition: all 0.15s;
        }
        .theme-toggle:hover { border-color: var(--pri); color: var(--pri); }

        /* ========== Main Card ========== */
        .main-card {
            background: var(--card); border-radius: 0;
            box-shadow: none; border: none;
            flex: 1; display: flex; flex-direction: column;
            overflow: hidden; min-height: 0;
        }

        #listArea {
            flex: 1; overflow-y: auto; overflow-x: auto; min-height: 0;
        }
        #listArea::-webkit-scrollbar { width: 8px; height: 8px; }
        #listArea::-webkit-scrollbar-track { background: transparent; }
        #listArea::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 4px; }
        #listArea::-webkit-scrollbar-thumb:hover { background: #9ca3af; }

        /* ========== Toolbar ========== */
        .toolbar-area {
            display: flex; align-items: center; gap: 16px;
            padding: 16px 28px; border-bottom: 1px solid #f3f4f6;
            flex-wrap: wrap; background: white;
        }
        .search-box { flex: 1; min-width: 280px; position: relative; }
        .search-box input {
            width: 100%; height: 38px; padding: 0 14px 0 38px;
            border: 1px solid var(--line); border-radius: var(--radius-sm);
            font-size: 14px; color: var(--t1); background: #f9fafb;
            transition: all 0.2s;
        }
        .search-box input:focus {
            outline: none; border-color: var(--pri); background: white;
            box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
        }
        .search-icon {
            position: absolute; left: 12px; top: 50%;
            transform: translateY(-50%); color: var(--t3);
            font-size: 16px; pointer-events: none;
        }
        .stat-text { font-size: 13px; color: var(--t2); font-weight: 500; }
        .stat-text strong { color: var(--pri-d); font-weight: 700; }

        /* ========== Filter Bar ========== */
        .filter-bar {
            padding: 14px 28px; background: #fafbfc;
            border-bottom: 1px solid #f3f4f6;
            display: flex; flex-direction: column; gap: 10px;
        }
        .filter-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
        .filter-label {
            font-size: 12px; font-weight: 700; color: var(--t3);
            text-transform: uppercase; letter-spacing: 0.8px; min-width: 50px;
        }
        .filter-tags { display: flex; gap: 6px; flex-wrap: wrap; flex: 1; }
        .filter-tag {
            display: inline-flex; align-items: center; gap: 5px;
            padding: 6px 14px; border-radius: 20px; font-size: 12.5px;
            font-weight: 600; cursor: pointer; transition: all 0.2s;
            border: 1.5px solid var(--line); background: white;
            color: var(--t2); user-select: none;
        }
        .filter-tag:hover { border-color: var(--pri); color: var(--pri); transform: translateY(-1px); }
        .filter-tag.active {
            background: var(--pri); color: white; border-color: var(--pri);
            box-shadow: 0 2px 8px rgba(99,102,241,0.25);
        }

        /* ========== List Table ========== */
        .list-table { width: 100%; min-width: 900px; border-collapse: collapse; }
        .list-table thead {
            position: sticky; top: 0; z-index: 10;
            background: #f9fafb; border-bottom: 1px solid #f3f4f6;
        }
        .list-table th {
            padding: 12px 16px; text-align: left;
            font-size: 11.5px; font-weight: 700; color: var(--t3);
            text-transform: uppercase; letter-spacing: 0.6px; white-space: nowrap;
        }
        .list-table td {
            padding: 14px 16px; border-bottom: 1px solid #f9fafb;
            vertical-align: middle; font-size: 14px;
        }
        .list-table tbody tr { transition: background 0.15s; cursor: default; }
        .list-table tbody tr:hover { background: rgba(99,102,241,0.02); }
        .list-table tbody tr:last-child td { border-bottom: none; }
        .list-table tbody tr.dragging { opacity: 0.4; background: #f0e6ff; }
        .list-table tbody tr.drag-over { border-top: 2px solid var(--pri); }
        .row-num-cell {
            width: 60px; text-align: center; vertical-align: middle;
            user-select: none;
        }
        .row-num {
            display: inline-flex; align-items: center; justify-content: center;
            padding: 4px 10px;
            height: 28px; border-radius: 7px;
            font-size: 12.5px; font-weight: 700; color: var(--t3);
            background: transparent; transition: all 0.2s cubic-bezier(0.4,0,0.2,1);
            cursor: grab; border: 1.5px solid transparent;
            font-variant-numeric: tabular-nums; min-width: 22px;
        }
        .row-num:active { cursor: grabbing; }
        .row-num:hover {
            background: linear-gradient(135deg, rgba(99,102,241,0.07), rgba(139,92,246,0.04));
            border-color: rgba(99,102,241,0.15);
            color: var(--pri-d);
        }
        .drop-zone-area {
            text-align: center; padding: 12px; font-size: 12px;
            color: var(--t3); border: 2px dashed transparent;
            border-radius: 8px; transition: all 0.2s; margin: 4px 0;
        }
        #dataTableDropZone.drag-over .drop-zone-area {
            border-color: var(--pri); color: var(--pri);
            background: rgba(99,102,241,0.05); font-weight: 600;
        }
        .row-title {
            font-weight: 650; color: var(--t1);
            display: flex; align-items: center; gap: 8px;
            max-width: 100%; overflow: hidden;
        }
        .row-title > span:first-child {
            overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
            flex: 1; min-width: 0;
        }
        .row-desc { color: var(--t3); font-size: 13.5px; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
        .row-time { color: var(--t3); font-size: 13px; white-space: nowrap; font-variant-numeric: tabular-nums; }
        .row-cat-tag {
            display: inline-flex; align-items: center; gap: 4px;
            font-size: 11px; padding: 4px 10px; border-radius: 12px;
            font-weight: 600; white-space: nowrap; flex-shrink: 0;
        }
        .row-ops {
            display: flex; gap: 8px; justify-content: flex-end;
            align-items: center; flex-wrap: nowrap; white-space: nowrap;
        }
        .op-btn {
            height: 30px; padding: 0 12px; border: none; border-radius: 6px;
            font-size: 12px; font-weight: 600; cursor: pointer;
            transition: all 0.15s; display: inline-flex;
            align-items: center; justify-content: center; gap: 4px;
            white-space: nowrap; flex-shrink: 0;
        }
        .op-btn:hover { transform: translateY(-1px); }
        .op-copy {
            background: #ecfdf5; color: #059669;
        }
        .op-copy:hover { background: #d1fae5; }
        .op-edit {
            background: #fffbeb; color: #d97706;
        }
        .op-edit:hover { background: #fef3c7; }
        .op-del {
            background: #fef2f2; color: #dc2626;
        }
        .op-del:hover { background: #fee2e2; }
        .fav-btn {
            width: 32px; height: 32px; border: none; border-radius: 8px;
            background: #f8fafc; font-size: 18px; cursor: pointer;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            display: inline-flex; align-items: center; justify-content: center;
            color: #cbd5e1;
        }
        .fav-btn:hover { background: #fef3c7; transform: scale(1.15) rotate(5deg); }
        .fav-btn.active {
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            color: #f59e0b; animation: favPop 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        }
        @keyframes favPop {
            0% { transform: scale(0.8); } 50% { transform: scale(1.2); } 100% { transform: scale(1); }
        }
        .has-img-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 11px;
            background: linear-gradient(135deg, #eff6ff, #dbeafe);
            color: #0369a1;
            padding: 4px 10px;
            border-radius: 12px;
            font-weight: 600;
            border: 1px solid rgba(14,165,233,0.15);
        }
        /* ========== Modal ========== */
        .modal-overlay {
            display: none; position: fixed; inset: 0; z-index: 999;
            align-items: center; justify-content: center;
        }
        .modal-overlay.show { display: flex; }
        .modal-backdrop {
            position: fixed; inset: 0;
            background: rgba(0,0,0,0.5); backdrop-filter: blur(4px);
        }
        .modal-dialog {
            position: relative; z-index: 1;
            width: 520px; max-width: 92vw; max-height: 90vh;
            background: white; border-radius: var(--radius-lg);
            box-shadow: 0 24px 48px rgba(0,0,0,0.2);
            display: flex; flex-direction: column;
            animation: modalIn 0.25s ease;
        }
        @keyframes modalIn {
            from { opacity: 0; transform: scale(0.95) translateY(10px); }
            to { opacity: 1; transform: scale(1) translateY(0); }
        }
        .modal-head {
            display: flex; align-items: center;
            justify-content: space-between;
            padding: 14px 18px; border-bottom: 1px solid #f3f4f6;
        }
        .modal-title { font-size: 17px; font-weight: 700; color: var(--t1); }
        .modal-close {
            width: 32px; height: 32px; border: none; border-radius: 6px;
            background: #f3f4f6; cursor: pointer; font-size: 16px;
            color: var(--t3); display: flex; align-items: center;
            justify-content: center; transition: all 0.15s;
        }
        .modal-close:hover { background: #e5e7eb; color: var(--t1); transform: rotate(90deg); }
        .modal-body {
            padding: 16px 18px; overflow-y: auto; overflow-x: visible; flex: 1;
        }

        /* ========== Form ========== */
        .form-group { margin-bottom: 18px; }
        .form-label {
            display: block; font-size: 12px; font-weight: 700;
            color: var(--t2); margin-bottom: 7px;
            text-transform: uppercase; letter-spacing: 0.5px;
        }
        .form-input {
            width: 100%; height: 42px; padding: 0 14px;
            border: 1px solid var(--line); border-radius: var(--radius-sm);
            font-size: 14.5px; color: var(--t1); background: #f9fafb;
            transition: all 0.2s;
        }
        .form-input:focus {
            outline: none; border-color: var(--pri); background: white;
            box-shadow: 0 0 0 3px rgba(99,102,241,0.08);
        }
        .editor {
            min-height: 180px; max-height: 400px; padding: 14px;
            border: 1px solid var(--line); border-radius: var(--radius-sm);
            font-size: 14.5px; line-height: 1.7; background: #fafbfd;
            overflow-y: auto; color: var(--t1);
        }
        .editor:focus { outline: none; border-color: var(--pri); background: white; }
        .editor img {
            max-width: 100%;
            max-height: 200px;
            border-radius: 6px;
            cursor: zoom-in;
            transition: all 0.2s ease;
        }
        .editor img:hover {
            transform: scale(1.02);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }
        .modal-foot {
            display: flex;
            justify-content: flex-end;
            gap: 10px;
            padding: 12px 18px;
            border-top: 1px solid #f3f4f6;
            background: #fafbfc;
        }
        .toast-container {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 9999;
            pointer-events: none;
        }
        .toast {
            background: #1f2937;
            color: white;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.25s ease;
            margin-top: 10px;
        }
        .toast.show {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .toast.success {
            background: #059669;
        }
        .toast.error {
            background: #dc2626;
        }
        .toast.warning {
            background: #d97706;
        }
        /* ========== Confirm Dialog ========== */
        .confirm-overlay {
            display: none; position: fixed; inset: 0; z-index: 1001;
            align-items: center; justify-content: center;
        }
        .confirm-overlay.show { display: flex; }
        .confirm-box {
            background: white; border-radius: var(--radius-lg);
            padding: 28px; max-width: 380px; text-align: center;
            box-shadow: 0 24px 48px rgba(0,0,0,0.2);
            animation: modalIn 0.25s ease;
        }
        .confirm-icon { font-size: 44px; margin-bottom: 12px; }
        .confirm-msg { font-size: 15px; color: var(--t2); line-height: 1.6; margin-bottom: 20px; white-space: pre-line; }
        .confirm-actions { display: flex; gap: 10px; justify-content: center; }

        /* ========== Input Dialog (自定义输入框) ========== */
        .input-dialog-overlay {
            display: none; position: fixed; inset: 0; z-index: 1002;
            align-items: center; justify-content: center;
        }
        .input-dialog-overlay.show { display: flex; }
        .input-dialog-backdrop {
            position: absolute; inset: 0;
            background: rgba(15,23,42,0.4); backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }
        .input-dialog-box {
            position: relative; z-index: 1;
            background: white; border-radius: 14px; padding: 24px 28px;
            max-width: 400px; width: 90vw;
            box-shadow: 0 20px 60px rgba(0,0,0,0.2), 0 0 0 1px rgba(255,255,255,0.05) inset;
            animation: inputDialogIn 0.25s cubic-bezier(0.22, 1, 0.36, 1);
            border: 1px solid rgba(226,232,240,0.6);
        }
        @keyframes inputDialogIn {
            from { opacity: 0; transform: scale(0.95) translateY(-12px); }
            to { opacity: 1; transform: scale(1) translateY(0); }
        }
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            20% { transform: translateX(-8px); }
            40% { transform: translateX(8px); }
            60% { transform: translateX(-5px); }
            80% { transform: translateX(5px); }
        }
        .input-dialog-head {
            display: flex; align-items: center; gap: 10px; margin-bottom: 16px;
        }
        .input-dialog-icon {
            font-size: 22px; width: 40px; height: 40px;
            display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(139,92,246,0.08));
            border-radius: 10px; flex-shrink: 0;
        }
        .input-dialog-title {
            font-size: 16px; font-weight: 700; color: var(--t1); line-height: 1.4;
        }
        .input-dialog-body { margin-bottom: 18px; }
        .input-dialog-field {
            width: 100%; height: 44px; padding: 0 16px;
            border: 1.5px solid #e2e8f0; border-radius: 9px;
            font-size: 14.5px; color: var(--t1); background: #f8fafc;
            transition: all 0.2s; outline: none; box-sizing: border-box;
        }
        .input-dialog-field:focus {
            border-color: var(--pri);
            box-shadow: 0 0 0 3px rgba(99,102,241,0.08); background: white;
        }
        .input-dialog-field::placeholder { color: var(--t3); }
        .input-dialog-foot { display: flex; justify-content: flex-end; gap: 10px; }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.3);
            z-index: 99;
        }
        .sidebar-overlay.show {
            display: block;
        }
        .mobile-menu-btn {
            display: none;
            width: 36px;
            height: 36px;
            border: 1.5px solid var(--line);
            border-radius: 8px;
            background: white;
            cursor: pointer;
            font-size: 16px;
            align-items: center;
            justify-content: center;
        }
        @media (max-width: 900px) {
            .sidebar {
                position: fixed;
                left: 0;
                top: 0;
                bottom: 0;
                z-index: 100;
                transform: translateX(-100%);
                transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-menu-btn {
                display: flex;
            }
            .app-header {
                padding: 16px 20px;
            }
            .toolbar-area {
                padding: 16px 20px;
            }
            .search-box {
                min-width: 240px;
            }
            .filter-bar {
                padding: 14px 20px;
            }
        }

        @media (max-width: 640px) {
            .sidebar {
                width: 260px;
                min-width: 260px;
            }
            .app-actions {
                gap: 10px;
            }
            .btn {
                padding: 0 16px;
                height: 42px;
                font-size: 14px;
            }
            .toolbar-area {
                gap: 14px;
            }
            .search-box {
                min-width: 100%;
                order: 1;
                flex: 0 0 100%;
            }
        }
        .empty-state {
            text-align: center;
            padding: 60px 24px;
        }
        .empty-icon {
            font-size: 56px;
            margin-bottom: 16px;
            opacity: 0.6;
        }
        .empty-title {
            font-size: 17px;
            font-weight: 650;
            color: var(--t2);
            margin-bottom: 8px;
        }
        .empty-desc {
            font-size: 14px;
            color: var(--t3);
            margin-bottom: 20px;
        }
        .empty-action {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            background: rgba(99,102,241,0.05);
            color: var(--pri);
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
            border: 1.5px dashed rgba(99,102,241,0.3);
        }
        .empty-action:hover {
            background: var(--pri); color: white; border-style: solid;
        }

        /* 本地图片占位符 */
        .local-image-placeholder {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            width: 200px;
            height: 150px;
            background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
            border: 2px dashed #f59e0b;
            border-radius: 8px;
            margin: 8px 0;
            cursor: pointer;
            transition: all 0.2s;
        }
        .local-image-placeholder:hover {
            background: linear-gradient(135deg, #fde68a 0%, #fbbf24 100%);
            transform: scale(1.02);
        }
        .placeholder-icon {
            font-size: 32px;
            margin-bottom: 8px;
        }
        .placeholder-text {
            font-size: 12px;
            color: #92400e;
            font-weight: 600;
            text-align: center;
        }
        .placeholder-btn {
            margin-top: 8px;
            padding: 6px 16px;
            background: #f59e0b;
            color: white;
            border: none;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
        }
        .placeholder-btn:hover {
            background: #d97706;
        }

        /* ========== Emoji 工具栏 & 选择器 ========== */
        .emoji-toolbar {
            position: relative;
            margin-bottom: 8px;
            z-index: 1;
        }
        .emoji-btn {
            display: inline-flex; align-items: center; gap: 5px;
            height: 32px; padding: 0 12px;
            border: 1.5px solid #e2e8f0; border-radius: 7px;
            background: white; font-size: 13px; font-weight: 600;
            color: var(--t2); cursor: pointer; transition: all 0.15s;
        }
        .emoji-btn:hover {
            border-color: var(--pri); color: var(--pri);
            background: rgba(99,102,241,0.04);
        }
        .emoji-picker {
            display: none; position: fixed !important;
            z-index: 999999 !important; width: 400px;
            background: white; border: 1.5px solid #e2e8f0;
            border-radius: 14px;
            box-shadow: 0 -6px 30px rgba(0,0,0,0.15), 0 -2px 10px rgba(0,0,0,0.08);
            animation: emojiPickerInUp 0.2s cubic-bezier(0.22, 1, 0.36, 1);
            pointer-events: auto !important;
        }
        @keyframes emojiPickerInUp {
            from { opacity: 0; transform: translateY(8px) scale(0.97); }
            to { opacity: 1; transform: translateY(0) scale(1); }
        }
        .emoji-picker.show { display: flex; flex-direction: column; }
        .emoji-body {
            display: flex; flex-direction: column; flex: 1; overflow: hidden;
        }
        .emoji-picker-head {
            display: flex; align-items: center; justify-content: space-between;
            padding: 11px 16px; border-bottom: 1px solid #f1f5f9;
            background: white; border-radius: 13px 13px 0 0;
            width: 100%; box-sizing: border-box; order: -1;
        }
        .emoji-picker-title {
            font-size: 13.5px; font-weight: 700; color: var(--t1);
        }
        .emoji-close-btn {
            width: 26px; height: 26px; border: none; border-radius: 6px;
            background: transparent; font-size: 14px; color: var(--t3);
            cursor: pointer; display: flex; align-items: center;
            justify-content: center; flex-shrink: 0;
        }
        .emoji-close-btn:hover { background: #f1f5f9; color: var(--t1); }
        .emoji-grid {
            display: grid; grid-template-columns: repeat(9, 1fr); gap: 3px;
            padding: 12px 14px; max-height: 200px; overflow-y: auto; flex: 1;
        }
        .emoji-grid::-webkit-scrollbar { width: 4px; }
        .emoji-grid::-webkit-scrollbar-track { background: transparent; }
        .emoji-grid::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 3px; }
        .emoji-item {
            width: 34px; height: 34px; display: flex; align-items: center;
            justify-content: center; font-size: 21px; border: none; border-radius: 7px;
            background: transparent; cursor: pointer; transition: all 0.12s;
        }
        .emoji-item:hover { background: #eef2ff; transform: scale(1.2); }
        .emoji-categories {
            display: flex; gap: 4px; padding: 10px 14px 12px;
            background: #fafbfc; border-top: 1px solid #f1f5f9;
            border-radius: 0 0 13px 13px; overflow-x: auto; flex-wrap: nowrap;
            scrollbar-width: thin; scrollbar-color: #d1d5db transparent;
        }
        .emoji-categories::-webkit-scrollbar { height: 4px; }
        .emoji-categories::-webkit-scrollbar-track { background: transparent; }
        .emoji-categories::-webkit-scrollbar-thumb {
            background: linear-gradient(90deg, #cbd5e1, #94a3b8); border-radius: 3px;
        }
        .emoji-cat-btn {
            flex-shrink: 0; height: 32px; padding: 0 10px;
            border: 2px solid transparent; border-radius: 9px;
            background: transparent; font-size: 18px; cursor: pointer;
            transition: all 0.15s; line-height: 1;
            display: flex; align-items: center; justify-content: center;
        }
        .emoji-cat-btn:hover { background: #f1f5f9; }
        .emoji-cat-btn.active {
            background: white; border-color: var(--pri);
            box-shadow: 0 2px 8px rgba(99,102,241,0.2); transform: scale(1);
        }

.cat-select-wrapper {
    position: relative;
    width: 100%;
}
.cat-select-trigger {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    height: 42px;
    padding: 0 14px;
    border: 1.5px solid #e5e7eb;
    border-radius: 6px;
    background: #f9fafb;
    cursor: pointer;
    transition: all 0.2s;
}
.cat-select-trigger:hover {
    border-color: #9ca3af;
    background: white;
}
.cat-select-wrapper.open .cat-select-trigger {
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99,102,241,0.08);
    background: white;
}
.cat-select-left {
    display: flex; align-items: center; gap: 8px;
    flex: 1; min-width: 0; overflow: hidden;
}
.cat-select-dot {
    width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0;
    box-shadow: 0 0 4px currentColor;
}
.cat-select-text {
    font-size: 14px; font-weight: 550; color: var(--t1);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cat-select-text.placeholder {
    color: #9ca3af;
    font-weight: 400;
}
.cat-select-arrow {
    font-size: 11px;
    color: #9ca3af;
    transition: transform 0.25s;
    margin-left: auto;
}
.cat-select-wrapper.open .cat-select-arrow {
    transform: rotate(180deg);
    color: #6366f1;
}
.cat-select-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: white;
    border: 1.5px solid #e5e7eb;
    border-radius: 10px;
    box-shadow: 0 12px 36px rgba(0,0,0,0.12);
    z-index: 9999;
    overflow: hidden;
    animation: dropdownIn 0.2s;
}
@keyframes dropdownIn {
    from { opacity: 0; transform: translateY(-6px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.cat-select-wrapper.open .cat-select-dropdown {
    display: block;
}
.cat-dropdown-head {
    padding: 10px 12px;
    border-bottom: 1px solid #f3f4f6;
    background: #fafbfc;
}
.cat-dropdown-search {
    display: flex;
    align-items: center;
    gap: 7px;
    height: 32px;
    padding: 0 10px;
    border: 1.5px solid #e5e7eb;
    border-radius: 6px;
    background: white;
}
.cat-dropdown-search:focus-within {
    border-color: #6366f1;
    box-shadow: 0 0 0 2px rgba(99,102,241,0.06);
}
.cat-dropdown-search input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 12.5px;
    color: #111827;
}
.cat-dropdown-list {
    max-height: 220px;
    overflow-y: auto;
    padding: 6px;
}
.cat-opt-none {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 11px;
    border-radius: 7px;
    cursor: pointer;
    transition: all 0.15s;
    margin-bottom: 2px;
    font-size: 13px;
    font-weight: 600;
    color: #4b5563;
}
.cat-opt-none:hover {
    background: #f8fafc;
}
.cat-opt-none.selected {
    background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(139,92,246,0.05));
    color: #4f46e5;
}
.cat-opt-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 11px;
    border-radius: 7px;
    cursor: pointer;
    transition: all 0.15s;
    margin-bottom: 2px;
    border: 1.5px solid transparent;
    background: white;
}
.cat-opt-item:hover {
    background: #f8fafc;
    border-color: #f1f5f9;
}
.cat-opt-item.selected {
    background: linear-gradient(135deg, rgba(99,102,241,0.09), rgba(139,92,246,0.06));
    border-color: rgba(99,102,241,0.25);
}
.cat-opt-name {
    flex: 1;
    font-size: 13px;
    font-weight: 600;
    color: #111827;
}
.cat-opt-count {
    font-size: 10.5px;
    font-weight: 700;
    color: #9ca3af;
    background: #f1f5f9;
    padding: 2px 7px;
    border-radius: 8px;
}
.cat-opt-children {
    margin-left: 18px;
    padding-left: 10px;
    border-left: 2px solid #f1f5f9;
    margin-top: 2px;
    margin-bottom: 2px;
}
.cat-opt-child {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 7px 9px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
    margin-bottom: 1px;
    border: 1.5px solid transparent;
    background: #fafbfc;
}
.cat-opt-child:hover {
    background: white;
    border-color: #f1f5f9;
}
.cat-opt-child.selected {
    background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(79,70,229,0.07));
    border-color: rgba(99,102,241,0.25);
}
.cat-opt-name-sm {
    flex: 1;
    font-size: 12px;
    font-weight: 550;
    color: #4b5563;
}
.cat-opt-child.selected .cat-opt-name-sm {
    color: #4f46e5;
    font-weight: 650;
}
.cat-opt-count-sm {
    font-size: 10px;
    font-weight: 650;
    color: #9ca3af;
    background: #f1f5f9;
    padding: 1px 6px;
    border-radius: 7px;
}
.cat-dropdown-foot {
    padding: 8px 12px;
    border-top: 1px solid #f3f4f6;
    background: #fafbfc;
}
.cat-add-new-btn {
    width: 100%;
    height: 30px;
    border: 1.5px dashed #cbd5e1;
    border-radius: 6px;
    background: transparent;
    color: #4b5563;
    font-size: 12px;
    font-weight: 650;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.cat-add-new-btn:hover {
    border-color: #10b981;
    color: #10b981;
    background: rgba(16,185,129,0.03);
}
:root.dark-mode {
    --bg: #0f172a;
    --card: #1e293b;
    --line: #334155;
    --t1: #f1f5f9;
    --t2: #cbd5e1;
    --t3: #64748b;
}
:root.dark-mode body { background: var(--bg); }
:root.dark-mode .sidebar {
    background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    border-right-color: var(--line);
}
:root.dark-mode .sidebar-header,
:root.dark-mode .sidebar-footer {
    background: #1e293b;
    border-color: var(--line);
}
:root.dark-mode .sidebar-search-box {
    background: #0f172a;
    border-color: var(--line);
}
:root.dark-mode .cat-nav-l1 { background: #1e293b; }
:root.dark-mode .cat-nav-l1:hover { background: #334155; border-color: var(--line); }
:root.dark-mode .cat-nav-l2 { background: #0f172a; }
:root.dark-mode .cat-nav-l2:hover { background: #1e293b; }
:root.dark-mode .app-header,
:root.dark-mode .toolbar-area,
:root.dark-mode .filter-bar {
    background: #1a202c;
    border-color: var(--line);
}
:root.dark-mode .btn-default,
:root.dark-mode .theme-toggle,
:root.dark-mode .filter-tag:not(.active) {
    background: #374151;
    border-color: var(--line);
    color: var(--t2);
}
:root.dark-mode .search-box input,
:root.dark-mode .form-input,
:root.dark-mode .editor {
    background: #111827;
    color: var(--t1);
    border-color: var(--line);
}
:root.dark-mode .list-table thead {
    background: #1f2937;
    border-bottom-color: #334155;
}
:root.dark-mode .list-table td {
    border-color: #1f2937;
    color: var(--t2);
}
:root.dark-mode .modal-dialog { background: #1e293b; }
:root.dark-mode .modal-head,
:root.dark-mode .modal-foot {
    background: #1a202c;
    border-color: var(--line);
}
:root.dark-mode .modal-close { background: #334155; }
:root.dark-mode .confirm-box {
    background: #1e293b;
    border: 1px solid #334155;
}
:root.dark-mode .cat-select-trigger,
:root.dark-mode .cat-select-dropdown {
    background: #1e293b;
    border-color: var(--line);
}
:root.dark-mode .cat-dropdown-head,
:root.dark-mode .cat-dropdown-foot {
    background: #0f172a;
    border-color: #334155;
}
:root.dark-mode .cat-dropdown-search,
:root.dark-mode .cat-opt-item {
    background: #1e293b;
    border-color: transparent;
}
:root.dark-mode .cat-opt-item:hover {
    background: #334155;
    border-color: #475569;
}
:root.dark-mode .cat-opt-child {
    background: #0f172a;
}
:root.dark-mode .cat-opt-child:hover {
    background: #1e293b;
}
:root.dark-mode .emoji-picker {
    background: #1e293b; border-color: #334155;
    box-shadow: 0 -8px 40px rgba(0,0,0,0.5), 0 4px 20px rgba(0,0,0,0.3);
}
:root.dark-mode .emoji-picker-head,
:root.dark-mode .emoji-categories {
    background: #0f172a; border-color: #334155;
}
:root.dark-mode .emoji-cat-btn.active {
    background: rgba(99,102,241,0.15);
}
:root.dark-mode .emoji-item:hover { background: #334155; }
:root.dark-mode .emoji-btn {
    background: #1e293b; border-color: #334155; color: var(--t2);
}