:root{--font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--primary-color: #1677ff;--primary-hover: #4096ff;--primary-active: #0958d9;--accent-green: #52c41a;--accent-green-bg: #f6ffed;--accent-green-border: #b7eb8f;--accent-red: #ff4d4f;--accent-red-hover: #ff7875;--bg-page: #f4f6f8;--bg-card: #ffffff;--bg-subtle: #f8fafc;--bg-header: #ffffff;--section-header-bg: #d9d9d9;--section-header-text: #333333;--tab-active-bg: #e6f4ff;--border-color: #e5e7eb;--border-light: #f0f0f0;--border-dark: #cccccc;--text-primary: #1f2937;--text-secondary: #4b5563;--text-muted: #8c8c8c;--text-light: #9ca3af;--text-price: #cf1322;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--app-max-width: 480px;--header-height: 50px}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{font-family:var(--font-family);background-color:#1e293b;color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;display:flex;justify-content:center;align-items:flex-start}#root{width:100%;min-height:100vh;display:flex;justify-content:center}.app-container{width:100%;max-width:var(--app-max-width);min-height:100vh;background-color:var(--bg-card);display:flex;flex-direction:column;position:relative;box-shadow:0 20px 25px -5px #0000004d}.app-header{position:sticky;top:0;z-index:50;background:var(--bg-header);border-bottom:1px solid var(--border-color);padding:10px 16px;display:flex;align-items:center;justify-content:space-between}.header-left{display:flex;align-items:center;gap:8px}.header-icon-btn{background:none;border:none;cursor:pointer;padding:4px;display:flex;align-items:center;justify-content:center;color:var(--text-primary);border-radius:6px;transition:background-color .2s}.header-icon-btn:hover{background-color:var(--bg-page)}.header-title-box{text-align:center;flex:1}.header-title{font-size:16px;font-weight:700;color:#111827;line-height:1.2}.header-subtitle{font-size:11px;color:var(--text-muted)}.header-right{display:flex;align-items:center;gap:6px}.selection-tabs{display:flex;background-color:#f1f3f5;border-bottom:1px solid var(--border-color);-webkit-user-select:none;user-select:none}.tab-item{flex:1;text-align:center;padding:10px 4px;font-size:15px;font-weight:500;color:#4b5563;cursor:pointer;border-right:1px solid #e5e7eb;transition:all 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.2s}.brand-card:hover{background-color:#f1f5f9}.brand-card.selected{background-color:#e0f2fe}.brand-logo-wrap{width:48px;height:48px;display:flex;align-items:center;justify-content:center;margin-bottom:6px}.brand-logo-img{max-width:44px;max-height:44px;object-fit:contain}.brand-logo-placeholder{width:42px;height:42px;border:1px solid #bfdbfe;background-color:#f0f9ff;color:#0284c7;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;border-radius:4px}.brand-name{font-size:12px;color:#334155;line-height:1.3;word-break:break-all}.alphabet-index-bar{position:fixed;right:calc(50% - var(--app-max-width) / 2 + 2px);top:120px;display:flex;flex-direction:column;gap:2px;padding:4px 2px;background:#ffffffd9;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border-radius:12px;z-index:30;box-shadow:0 2px 4px #0000000d}@media (max-width: 480px){.alphabet-index-bar{right:2px}}.alphabet-letter-btn{font-size:10px;font-weight:600;color:#64748b;border:none;background:none;cursor:pointer;padding:1px 3px;border-radius:4px}.alphabet-letter-btn:hover,.alphabet-letter-btn.active{color:var(--primary-color);background-color:#e0f2fe}.series-page{flex:1;overflow-y:auto;padding-bottom:40px}.factory-section-header{background-color:#e2e8f0;padding:6px 14px;font-size:13px;font-weight:600;color:#1e293b;border-left:3px solid var(--primary-color)}.series-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px 6px;padding:14px 8px}.series-card{display:flex;flex-direction:column;align-items:center;text-align:center;padding:6px 2px;cursor:pointer;border-radius:8px;transition:all .2s}.series-card:hover{background-color:#f1f5f9}.series-img-wrap{width:68px;height:48px;display:flex;align-items:center;justify-content:center;margin-bottom:6px}.series-img{max-width:68px;max-height:46px;object-fit:contain}.series-img-placeholder{width:42px;height:42px;border:1px solid #bfdbfe;background-color:#f0f9ff;color:#0284c7;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;border-radius:4px}.series-name{font-size:12px;color:#334155;line-height:1.3}.model-page{flex:1;display:flex;overflow:hidden}.year-sidebar{width:72px;background-color:#f8fafc;border-right:1px solid var(--border-color);overflow-y:auto;padding:8px 4px;display:flex;flex-direction:column;gap:6px}.year-btn{padding:8px 4px;border-radius:4px;font-size:13px;text-align:center;color:#475569;background-color:#fff;border:1px solid #e2e8f0;cursor:pointer;transition:all .2s}.year-btn.active{background-color:#1677ff;color:#fff;border-color:#1677ff;font-weight:600}.model-list-wrap{flex:1;overflow-y:auto;padding:10px 12px 40px;display:flex;flex-direction:column;gap:12px}.model-card-item{display:flex;align-items:center;gap:12px;padding:8px;border-bottom:1px solid #f1f5f9;cursor:pointer;border-radius:6px;transition:background-color 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#e2e8f0;flex-wrap:wrap;gap:8px}.oil-tag{background-color:#52c41a;color:#fff;font-size:12px;font-weight:600;padding:4px 8px;border-radius:4px;display:inline-flex;align-items:center;cursor:pointer;transition:transform .1s,opacity .2s}.oil-tag:hover{opacity:.9;transform:translateY(-1px)}.oil-tag.blue{background-color:#1890ff}.oil-tag.orange{background-color:#fa8c16}.gearbox-info-grid{display:grid;grid-template-columns:1.3fr 1fr;border-bottom:1px solid #e2e8f0}.gearbox-row{padding:8px 14px;display:flex;align-items:center;justify-content:space-between;border-top:1px solid #e2e8f0}.view-img-dropdown-btn{background-color:#fff;border:1px solid #cbd5e1;padding:2px 8px;font-size:12px;color:#334155;border-radius:4px;cursor:pointer;display:flex;align-items:center;gap:4px}.view-img-dropdown-btn:hover{background-color:#f8fafc;border-color:#94a3b8}.capacity-select{padding:4px 10px;border:1px solid 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