:root {
            --bg-body: #0f172a;
            --bg-card: #1e293b;
            --bg-input: #0f172a;
            --bg-secondary: #1e293b;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-label: #cbd5e1;
            --border-color: #334155;
            --border-input: #475569;
            --accent-color: #38bdf8;
            --accent-hover: #0ea5e9;
            --shadow: 0 1px 3px rgba(0,0,0,0.3);
            --grid-color: #334155;
            --brand-yangwang: #c9a227;
            --brand-tengshi: #a855f7;
            --brand-dynasty: #dc2626;
            --brand-ocean: #0891b2;
            --brand-fangchengbao: #ea580c;
            --type-ev: #10b981;
            --type-phev: #f59e0b;
        }

        [data-theme="light"] {
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-input: #ffffff;
            --bg-secondary: #f8fafc;
            --text-primary: #1a1a2e;
            --text-secondary: #666666;
            --text-label: #555555;
            --border-color: #e8ecf1;
            --border-input: #d0d7de;
            --accent-color: #0066cc;
            --accent-hover: #0052a3;
            --shadow: 0 1px 3px rgba(0,0,0,0.04);
            --grid-color: #e8ecf1;
        }

        [data-theme="light"] .model-brand.yangwang,
        [data-theme="light"] .model-brand.tengshi,
        [data-theme="light"] .model-brand.dynasty,
        [data-theme="light"] .model-brand.ocean,
        [data-theme="light"] .model-brand.fangchengbao { color: #000; }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg-body); min-height: 100vh; padding: 20px; color: var(--text-primary); transition: background 0.3s, color 0.3s; }
        .container { max-width: 1400px; margin: 0 auto; }

        .header { text-align: center; margin-bottom: 30px; position: relative; }
        .header h1 { font-size: 2rem; color: var(--text-primary); margin-bottom: 10px; font-weight: 700; }
        .header h1 i { color: var(--accent-color); margin-right: 10px; }
        .header p { color: var(--text-secondary); font-size: 1rem; }
        .theme-toggle { position: absolute; right: 0; top: 0; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 50%; width: 40px; height: 40px; padding: 0; color: var(--text-secondary); cursor: pointer; font-size: 1.1rem; display: flex; align-items: center; justify-content: center; transition: all 0.2s; }
        .theme-toggle:hover { border-color: var(--accent-color); color: var(--accent-color); }
        html[data-theme="light"] .theme-toggle { color: #fbbf24; }
        html[data-theme="light"] .theme-toggle:hover { border-color: #fbbf24; color: #f59e0b; }

        .filter-bar { background: var(--bg-card); border-radius: 12px; padding: 20px; border: 1px solid var(--border-color); box-shadow: var(--shadow); margin-bottom: 25px; }
        .filter-grid { display: grid; grid-template-columns: 2fr 1fr 1fr auto auto; gap: 10px; align-items: end; }
        .filter-group { display: flex; flex-direction: column; gap: 6px; }
        .filter-group label { font-size: 0.85rem; color: var(--text-label); font-weight: 500; }
        .filter-group input, .filter-group select { padding: 10px 14px; border: 1px solid var(--border-input); border-radius: 8px; background: var(--bg-input); color: var(--text-primary); font-size: 0.95rem; transition: all 0.2s; }
        .filter-group input:focus, .filter-group select:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(56,189,248,0.1); }
        .btn-reset { padding: 10px 20px; background: transparent; border: 1px solid var(--border-input); border-radius: 8px; color: var(--text-secondary); font-size: 0.9rem; cursor: pointer; transition: all 0.2s; height: fit-content; }
        .btn-reset:hover { border-color: var(--accent-color); color: var(--accent-color); }
        .btn-filter { padding: 10px 20px; background: var(--accent-color); border: 1px solid var(--accent-color); border-radius: 8px; color: #fff; font-size: 0.9rem; cursor: pointer; transition: all 0.2s; height: fit-content; }
        .btn-filter:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

        .brand-tabs { display: flex; gap: 10px; margin-bottom: 25px; flex-wrap: wrap; }
        .brand-tab { padding: 10px 20px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 25px; color: var(--text-secondary); font-size: 0.9rem; cursor: pointer; transition: all 0.2s; display: flex; align-items: center; gap: 8px; }
        .brand-tab:hover { border-color: var(--accent-color); color: var(--accent-color); }
        .brand-icon { width: 20px; height: 20px; object-fit: contain; }
        .brand-tab.active { background: var(--accent-color); border-color: var(--accent-color); color: #fff; }
        .brand-tab.yangwang.active { background: var(--brand-yangwang); border-color: var(--brand-yangwang); }
        .brand-tab.tengshi.active { background: var(--brand-tengshi); border-color: var(--brand-tengshi); }
        .brand-tab.dynasty.active { background: var(--brand-dynasty); border-color: var(--brand-dynasty); }
        .brand-tab.ocean.active { background: var(--brand-ocean); border-color: var(--brand-ocean); }
        .brand-tab.fangchengbao.active { background: var(--brand-fangchengbao); border-color: var(--brand-fangchengbao); }
        .brand-count { margin-left: 6px; padding: 2px 6px; background: var(--bg-body); border-radius: 10px; font-size: 0.75rem; color: var(--text-secondary); }
        .brand-tab.active .brand-count { background: rgba(255,255,255,0.2); color: #fff; }

        .models-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 20px; }

        .model-card { background: var(--bg-card); border-radius: 12px; overflow: hidden; border: 1px solid var(--border-color); box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s; }
        .model-card:hover { transform: translateY(-5px); box-shadow: 0 10px 30px rgba(0,0,0,0.2); }

        .model-image { width: 100%; height: 200px; background: var(--bg-secondary); display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
        .model-image img { width: 100%; height: 100%; object-fit: cover; position: absolute; top: 0; left: 0; opacity: 0; transition: opacity 0.5s ease; }
        .model-image img.active { opacity: 1; }
        .model-image-placeholder { display: flex; flex-direction: column; align-items: center; color: var(--text-secondary); }
        .model-image-placeholder i { font-size: 3rem; margin-bottom: 10px; opacity: 0.5; }
        .model-image-placeholder span { font-size: 0.85rem; }
        .model-type-badge { position: absolute; top: 12px; right: 12px; padding: 4px 10px; border-radius: 12px; font-size: 0.75rem; font-weight: 600; z-index: 10; }
        .model-type-badge.ev { background: rgba(16,185,129,0.9); color: #fff; }
        .model-type-badge.phev { background: rgba(245,158,11,0.9); color: #fff; }
        
        .slideshow-controls { position: absolute; bottom: 10px; left: 50%; transform: translateX(-50%); display: flex; gap: 6px; z-index: 10; }
        .slideshow-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.4); cursor: pointer; transition: all 0.3s; }
        .slideshow-dot.active { background: #fff; width: 20px; border-radius: 4px; }
        .slideshow-dot:hover { background: rgba(255,255,255,0.8); }
        
        .slideshow-nav { position: absolute; top: 50%; transform: translateY(-50%); width: 32px; height: 32px; background: rgba(0,0,0,0.4); border: none; border-radius: 50%; color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s; z-index: 10; }
        .model-image:hover .slideshow-nav { opacity: 1; }
        .slideshow-nav:hover { background: rgba(0,0,0,0.6); }
        .slideshow-nav.prev { left: 10px; }
        .slideshow-nav.next { right: 10px; }
        
        .slideshow-indicators { position: absolute; bottom: 10px; left: 50%; transform: translateX(-50%); display: flex; gap: 6px; z-index: 10; }

        .model-header { padding: 15px 20px; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
        .model-brand { display: inline-block; padding: 3px 10px; border-radius: 10px; font-size: 0.7rem; font-weight: 600; flex-shrink: 0; }
        .model-brand.yangwang { background: rgba(201,162,39,0.35); color: #fff; }
        .model-brand.tengshi { background: rgba(168,85,247,0.35); color: #fff; }
        .model-brand.dynasty { background: rgba(220,38,38,0.35); color: #fff; }
        .model-brand.ocean { background: rgba(8,145,178,0.35); color: #fff; }
        .model-brand.fangchengbao { background: rgba(234,88,12,0.35); color: #fff; }
        .model-title { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
        .model-name { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); }
        .model-version { font-size: 0.85rem; color: var(--text-secondary); font-weight: 400; }

        .model-body { padding: 15px 20px; }
        .specs-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 15px; }
        .spec-item { text-align: center; padding: 8px; background: var(--bg-secondary); border-radius: 8px; }
        .spec-value { font-size: 1.1rem; font-weight: 700; color: var(--accent-color); }
        .spec-label { font-size: 0.7rem; color: var(--text-secondary); margin-top: 3px; }

        .dimensions-info { background: var(--bg-secondary); border-radius: 8px; padding: 12px; margin-bottom: 15px; }
        .dimensions-title { font-size: 0.8rem; color: var(--text-label); margin-bottom: 8px; display: flex; align-items: center; gap: 6px; }
        .dimensions-title i { color: var(--accent-color); }
        .dimensions-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 12px; }
        .dimension-item { display: flex; justify-content: space-between; font-size: 0.8rem; }
        .dimension-item:first-child { grid-column: 1; }
        .dimension-item:last-child { grid-column: 2; }
        .dimension-label { color: var(--text-secondary); white-space: nowrap; }
        .dimension-value { color: var(--text-primary); font-weight: 500; white-space: nowrap; }

        .charging-info { background: var(--bg-secondary); border-radius: 8px; padding: 12px; }
        .charging-title { font-size: 0.8rem; color: var(--text-label); margin-bottom: 8px; display: flex; align-items: center; gap: 6px; }
        .charging-title i { color: var(--accent-color); }
        .charging-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-bottom: 12px; }
        .charging-stat { display: flex; flex-direction: column; gap: 2px; }
        .charging-stat-value { font-size: 0.95rem; font-weight: 600; color: var(--text-primary); }
        .charging-stat-label { font-size: 0.7rem; color: var(--text-secondary); }
        
        .charging-table-wrapper { overflow-x: auto; margin-top: 8px; }
        .charging-table { width: 100%; border-collapse: collapse; font-size: 0.7rem; }
        .charging-table th, .charging-table td { padding: 6px 4px; text-align: center; border: 1px solid var(--border-color); }
        .charging-table th { background: var(--bg-body); color: var(--text-label); font-weight: 600; }
        .charging-table td { color: var(--text-primary); }
        .charging-table td:first-child { font-weight: 600; color: var(--text-label); background: var(--bg-body); }
        .charging-table th:first-child { background: var(--bg-body); }

        .model-footer { padding: 15px 20px; border-top: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .price-tag { font-size: 1.1rem; font-weight: 700; color: var(--accent-color); }
        .price-unit { font-size: 0.8rem; color: var(--text-secondary); font-weight: 400; }
        .btn-calc { padding: 8px 16px; background: var(--accent-color); border: none; border-radius: 6px; color: #fff; font-size: 0.85rem; cursor: pointer; transition: all 0.2s; display: flex; align-items: center; gap: 6px; }
        .btn-calc:hover { background: var(--accent-hover); }

        .loading { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
        .loading i { font-size: 2rem; animation: spin 1s linear infinite; margin-bottom: 15px; }
        @keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

        .no-results { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
        .no-results i { font-size: 3rem; margin-bottom: 15px; opacity: 0.5; }
        .no-results p { font-size: 1.1rem; }

        @media (max-width: 1200px) {
            .filter-grid { grid-template-columns: 1fr 1fr; }
            .models-grid { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
        }
        @media (max-width: 768px) {
            .filter-grid { grid-template-columns: 1fr; }
            .models-grid { grid-template-columns: 1fr; }
            .specs-row { grid-template-columns: repeat(2, 1fr); }
            .theme-toggle { position: static; margin: 0 auto 16px; }
        }