:root {
            --bg: #f4f5f7;
            --card-bg: #ffffff;
            --text: #1a1a2e;
            --text-secondary: #6b7280;
            --text-muted: #9ca3af;
            --border: #e5e7eb;
            --accent: #2563eb;
            --accent-hover: #1d4ed8;
            --accent-light: #eff6ff;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.09);
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 14px;
            --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-mono: 'SF Mono', 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
            --color-ctrl: #ef4444;
            --color-ctrl-bg: #fef2f2;
            --color-digit: #10b981;
            --color-digit-bg: #ecfdf5;
            --color-upper: #f59e0b;
            --color-upper-bg: #fffbeb;
            --color-lower: #3b82f6;
            --color-lower-bg: #eff6ff;
            --color-punct: #8b5cf6;
            --color-punct-bg: #f5f3ff;
            --color-ext: #ec4899;
            --color-ext-bg: #fdf2f8;
            --footer-bg: #ffffff;
            --footer-border: #e5e7eb;
            --nav-link-color: #4b5563;
            --breadcrumb-color: #6b7280;
            --table-stripe: #f9fafb;
        }
        [data-theme="dark"] {
            --bg: #111827;
            --card-bg: #1f2937;
            --text: #f1f5f9;
            --text-secondary: #9ca3af;
            --text-muted: #6b7280;
            --border: #374151;
            --accent: #3b82f6;
            --accent-hover: #60a5fa;
            --accent-light: #1e3a5f;
            --color-ctrl-bg: #3b1a1a;
            --color-digit-bg: #0f2f24;
            --color-upper-bg: #2d2410;
            --color-lower-bg: #1a2740;
            --color-punct-bg: #1f1a3b;
            --color-ext-bg: #2d1a2e;
            --footer-bg: #1f2937;
            --footer-border: #374151;
            --nav-link-color: #d1d5db;
            --breadcrumb-color: #9ca3af;
            --table-stripe: #1e293b;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            min-height: 100vh;
            transition: background 0.3s, color 0.3s;
            -webkit-font-smoothing: antialiased;
        }
        .header {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top:0;
            z-index:100;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: all 0.3s;
        }
        [data-theme="dark"] .header {
            background: rgba(31,41,55,0.88);
        }
        .header-inner {
            max-width:1260px;
            margin:0 auto;
            display:flex;
            align-items:center;
            gap:24px;
            padding:0 20px;
            height:56px;
            flex-wrap:wrap;
        }
        .logo {
            display:flex;
            align-items:center;
            gap:8px;
            font-weight:700;
            font-size:1.1rem;
            letter-spacing:-0.01em;
            color:var(--text);
            text-decoration:none;
            white-space:nowrap;
            margin-right:auto;
        }
        .logo-icon {
            width:34px;
            height:34px;
            border-radius:var(--radius-sm);
            background:linear-gradient(135deg,#2563eb,#6366f1);
            display:flex;
            align-items:center;
            justify-content:center;
            color:#fff;
            font-family:var(--font-mono);
            font-weight:800;
            font-size:0.75rem;
        }
        .nav-menu {
            display:flex;
            gap:6px;
            align-items:center;
            list-style:none;
            flex-wrap:wrap;
        }
        .nav-menu li a {
            display:block;
            padding:6px 14px;
            border-radius:18px;
            font-size:0.82rem;
            font-weight:500;
            color:var(--nav-link-color);
            text-decoration:none;
            transition:all var(--transition);
            white-space:nowrap;
            border:1px solid transparent;
        }
        .nav-menu li a:hover {
            background:var(--accent-light);
            color:var(--accent);
            border-color:var(--border);
        }
        .nav-menu li a.active {
            background:var(--accent);
            color:#fff;
            border-color:var(--accent);
            font-weight:600;
        }
        .theme-toggle {
            width:38px;
            height:38px;
            border-radius:50%;
            border:1.5px solid var(--border);
            background:var(--card-bg);
            cursor:pointer;
            font-size:1rem;
            display:flex;
            align-items:center;
            justify-content:center;
            transition:all var(--transition);
            color:var(--text);
            flex-shrink:0;
            font-weight:700;
            margin-left:8px;
        }
        .theme-toggle:hover {
            border-color:var(--accent);
            box-shadow:var(--shadow-sm);
            transform:scale(1.04);
        }
        @media (max-width:768px) {
            .header-inner {
                height:auto;
                padding:10px 16px;
                flex-direction:column;
                gap:8px;
                align-items:flex-start;
            }
            .nav-menu {
                overflow-x:auto;
                width:100%;
                padding-bottom:4px;
            }
            .theme-toggle {
                position:absolute;
                top:10px;
                right:16px;
            }
        }
        .breadcrumb {
            font-size:0.82rem;
            color:var(--breadcrumb-color);
            padding:0 0 8px 0;
            display:flex;
            align-items:center;
            gap:6px;
            flex-wrap:wrap;
        }
        .breadcrumb a {
            color:var(--breadcrumb-color);
            text-decoration:none;
            transition:color 0.2s;
        }
        .breadcrumb a:hover {
            color:var(--accent);
            text-decoration:underline;
        }
        .breadcrumb .separator {
            user-select:none;
        }
        .breadcrumb .current {
            color:var(--text);
            font-weight:600;
        }
        .container {
            max-width:1260px;
            margin:0 auto;
            padding:20px 18px 40px;
            display:flex;
            flex-direction:column;
            gap:20px;
        }
        .card {
            background:var(--card-bg);
            border-radius:var(--radius-lg);
            padding:18px 20px;
            border:1px solid var(--border);
            box-shadow:var(--shadow-sm);
            transition:all var(--transition);
        }
        .card:hover {
            box-shadow:var(--shadow-md);
        }
        .section-title {
            font-size:0.75rem;
            font-weight:700;
            text-transform:uppercase;
            letter-spacing:0.06em;
            color:var(--text-secondary);
            margin-bottom:14px;
            display:flex;
            align-items:center;
            gap:6px;
        }
        .section-title::before {
            content:'';
            display:inline-block;
            width:4px;
            height:16px;
            border-radius:2px;
            background:var(--accent);
        }
        /* 筛选栏 */
        .filter-bar {
            display:flex;
            flex-wrap:wrap;
            gap:8px;
            align-items:center;
            margin-bottom:14px;
        }
        .filter-chip {
            padding:6px 12px;
            border-radius:18px;
            font-size:0.72rem;
            font-weight:600;
            background:var(--card-bg);
            border:1.5px solid var(--border);
            color:var(--text-secondary);
            cursor:pointer;
            transition:all var(--transition);
            white-space:nowrap;
            user-select:none;
        }
        .filter-chip:hover {
            border-color:var(--accent);
            color:var(--accent);
            box-shadow:var(--shadow-sm);
        }
        .filter-chip.active {
            background:var(--accent);
            color:#fff;
            border-color:var(--accent);
        }
        .search-input {
            margin-left:auto;
            padding:6px 12px;
            border-radius:18px;
            border:1.5px solid var(--border);
            font-size:0.78rem;
            font-family:var(--font-mono);
            background:var(--card-bg);
            color:var(--text);
            width:180px;
            outline:none;
            transition:all var(--transition);
        }
        .search-input:focus {
            border-color:var(--accent);
            width:210px;
            box-shadow:0 0 0 3px rgba(37,99,235,0.08);
        }
        .row-count {
            font-size:0.72rem;
            color:var(--text-muted);
            margin-left:8px;
            white-space:nowrap;
        }
        /* 表格容器 */
        .table-wrapper {
            overflow-x:auto;
            border-radius:var(--radius);
            border:1px solid var(--border);
            background:var(--card-bg);
        }
        table {
            width:100%;
            border-collapse:collapse;
            font-family:var(--font-mono);
            font-size:0.82rem;
            min-width:900px;
        }
        th, td {
            padding:8px 10px;
            text-align:center;
            border-bottom:1px solid var(--border);
            white-space:nowrap;
        }
        th {
            background:var(--bg);
            color:var(--text-secondary);
            font-weight:600;
            font-size:0.7rem;
            text-transform:uppercase;
            letter-spacing:0.04em;
            position:sticky;
            top:0;
            z-index:1;
        }
        tbody tr:hover {
            background:var(--accent-light);
        }
        .char-cell {
            font-weight:700;
            font-size:1rem;
            color:var(--text);
        }
        .ctrl-cell {
            color:var(--color-ctrl);
            font-size:0.8rem;
        }
        .entity {
            color:var(--accent);
            font-size:0.75rem;
        }
        .category-tag {
            display:inline-block;
            padding:2px 8px;
            border-radius:10px;
            font-size:0.62rem;
            font-weight:600;
        }
        .tag-ctrl { background:var(--color-ctrl-bg); color:var(--color-ctrl); }
        .tag-digit { background:var(--color-digit-bg); color:var(--color-digit); }
        .tag-upper { background:var(--color-upper-bg); color:var(--color-upper); }
        .tag-lower { background:var(--color-lower-bg); color:var(--color-lower); }
        .tag-punct { background:var(--color-punct-bg); color:var(--color-punct); }
        .tag-ext { background:var(--color-ext-bg); color:var(--color-ext); }
        /* 广告 */
        .ad-placeholder {
            border:1px dashed var(--border);
            border-radius:var(--radius);
            padding:14px;
            text-align:center;
            color:var(--text-muted);
            font-size:0.72rem;
            background:var(--bg);
            min-height:70px;
            display:flex;
            align-items:center;
            justify-content:center;
        }
        .footer {
            background:var(--footer-bg);
            border-top:1px solid var(--footer-border);
            padding:24px 20px 20px;
            margin-top:20px;
            transition:background 0.3s;
        }
        .footer-inner {
            max-width:1260px;
            margin:0 auto;
            display:flex;
            flex-wrap:wrap;
            gap:20px;
            align-items:center;
            justify-content:space-between;
        }
        .footer-copyright {
            font-size:0.7rem;
            color:var(--text-muted);
        }
        @media (max-width:640px) {
            .card {
                padding:12px 10px;
            }
            table {
                font-size:0.7rem;
            }
            th, td {
                padding:6px 5px;
            }
            .search-input {
                width:100%;
                margin-left:0;
                margin-top:4px;
            }
            .search-input:focus {
                width:100%;
            }
        }
        ::-webkit-scrollbar {
            width:5px;
            height:5px;
        }
        ::-webkit-scrollbar-track {
            background:transparent;
        }
        ::-webkit-scrollbar-thumb {
            background:#c1c1c6;
            border-radius:10px;
        }
        [data-theme="dark"] ::-webkit-scrollbar-thumb {
            background:#48484a;
        }