:root{--a11y-success: #047857; --a11y-success-bg: #ecfdf5; --a11y-info: #0a4f94; --a11y-info-bg: #eef5fc; --a11y-warning: #92400e; --a11y-warning-bg: #fffbeb;}
        .dark{--a11y-success: #34d399; --a11y-success-bg: #052e16; --a11y-info: #6cb2f0; --a11y-info-bg: #0e2747; --a11y-warning: #fbbf24; --a11y-warning-bg: #451a03;}
        .dark .hero h1 { color: #f8fafc; }
        .dark .hero-sub { color: #e2e8f0; }
        .dark .section-header h2 { color: #f8fafc; }
        .dark .content-card p,
        .dark .content-card ul li { color: #cbd5e1; }
        .dark .highlight-card p,
        .dark .highlight-card ul li { color: #cbd5e1; }
        .dark .stat-card p { color: var(--text-muted); }
        .dark .contact-block p { color: #cbd5e1; }
        .dark .breadcrumb a { color: var(--text-muted); }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
            margin: 20px 0 24px;
        }
        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 22px 16px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-50);
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
        }
        .stat-icon .svg-icon {
            width: 1.5rem;
            height: 1.5rem;
            color: var(--primary);
        }
        .stat-card h3 {
            font-weight: 700;
            font-size: 1rem;
            letter-spacing: -0.01em;
            color: var(--secondary);
            margin-bottom: 6px;
        }
        .dark .stat-card h3 {
            color: #f1f5f9;
        }
        .stat-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.45;
            margin: 0;
        }
        .content-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 28px 26px;
            margin-bottom: 20px;
            box-shadow: var(--shadow-sm);
        }
        .content-card h2 {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--secondary);
            margin-bottom: 14px;
        }
        .dark .content-card h2 {
            color: #f8fafc;
        }
        .content-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 18px 0 8px;
            color: var(--secondary);
        }
        .dark .content-card h3 {
            color: #f1f5f9;
        }
        .content-card p {
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .content-card ul {
            list-style: disc;
            padding-left: 22px;
            margin: 10px 0 16px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .content-card ul li {
            margin-bottom: 6px;
        }
        .highlight-card {
            background: var(--a11y-info-bg);
            border: 1.5px solid rgba(10, 79, 148, 0.2);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            margin: 18px 0 12px;
        }
        .highlight-card h4 {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--a11y-info);
            margin-bottom: 8px;
        }
        .highlight-card p,
        .highlight-card li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        .highlight-card ul {
            margin-top: 6px;
            padding-left: 18px;
        }
        .highlight-card.warning {
            background: var(--a11y-warning-bg);
            border-color: rgba(217, 119, 6, 0.25);
        }
        .highlight-card.warning h4 {
            color: var(--a11y-warning);
        }
        .highlight-card.success {
            background: var(--a11y-success-bg);
            border-color: rgba(5, 150, 105, 0.25);
        }
        .highlight-card.success h4 {
            color: var(--a11y-success);
        }
        .kbd-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            margin: 8px 0;
        }
        .kbd-key {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 30px;
            height: 28px;
            padding: 0 8px;
            background: var(--card-bg);
            border: 1.5px solid var(--border);
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text);
            box-shadow: 0 1px 0 var(--border);
        }
        .kbd-sep {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .kbd-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .contact-block {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 28px 24px;
            text-align: center;
            margin-top: 12px;
        }
        .contact-block h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--secondary);
        }
        .dark .contact-block h3 {
            color: #f1f5f9;
        }
        .contact-block p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 8px;
        }
        .contact-block a {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
        }
        .contact-block a:hover {
            text-decoration: underline;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
            padding: 14px 0 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .breadcrumb .sep {
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }
        .dark .breadcrumb .current {
            color: #f8fafc;
        }
        @media (max-width: 768px) {
            .stats-grid { gap: 12px; }
            .stat-card { padding: 16px 12px; }
            .stat-card h3 { font-size: 0.85rem; }
            .stat-card p { font-size: 0.7rem; }
            .content-card { padding: 20px 18px; }
            .highlight-card { padding: 16px 16px; }
            .kbd-key { font-size: 0.7rem; min-width: 26px; height: 24px; }
        }
        @media (max-width: 480px) {
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .stat-card { padding: 14px 10px; }
            .content-card { padding: 16px 14px; }
        }