:root{--color-bg: #f5f5f7;--color-card: #ffffff;--color-text: #1d1d1f;--color-muted: #909399;--color-accent: #c2185b;--color-border: #ececec;--shadow-card: 0 1px 8px rgba(0, 0, 0, .04);--radius-card: 12px;--bottom-tabs-h: 56px}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;padding:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--color-bg);color:var(--color-text);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font-family:inherit}img{display:block;max-width:100%}.app-shell{max-width:480px;margin:0 auto;min-height:100%;background:var(--color-bg);position:relative;padding-bottom:var(--bottom-tabs-h)}.topbar{position:sticky;top:0;z-index:10;background:var(--color-card);padding:12px 16px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--color-border)}.topbar .back{width:32px;height:32px;display:inline-flex;align-items:center;justify-content:center;font-size:20px;color:var(--color-text)}.topbar .title{flex:1;font-weight:600;font-size:16px;text-align:center}.topbar .right{width:32px}.card{background:var(--color-card);border-radius:var(--radius-card);padding:12px;margin:8px 12px;box-shadow:var(--shadow-card)}.row{display:flex;align-items:center}.row.between{justify-content:space-between}.row.gap{gap:12px}.text-muted{color:var(--color-muted);font-size:12px}.text-mono{font-family:ui-monospace,SFMono-Regular,SF Mono,Menlo,monospace}.price{color:var(--color-accent);font-weight:600}.price.lg{font-size:20px}.price.xl{font-size:26px}.list-price{color:var(--color-muted);font-size:11px;text-decoration:line-through}.tag{display:inline-block;padding:2px 8px;border-radius:6px;background:#f0f1f5;color:#606266;font-size:11px;margin:0 4px 4px 0;line-height:1.5}.tag.trust-official{background:#fdecef;color:#c2185b}.tag.trust-high{background:#e8f5e9;color:#2e7d32}.tag.trust-medium{background:#fff8e1;color:#ef6c00}.tag.trust-unknown{background:#eceff1;color:#455a64}.btn{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 16px;border:none;border-radius:8px;font-size:14px;cursor:pointer}.btn.primary{background:var(--color-accent);color:#fff}.btn.primary:disabled{background:#d3d4d8}.btn.ghost{background:transparent;border:1px solid var(--color-accent);color:var(--color-accent)}.btn.block{width:100%}.btn.sm{height:30px;padding:0 12px;font-size:12px}.section-title{padding:16px 16px 8px;font-size:15px;font-weight:600}.thumb{width:80px;height:80px;border-radius:8px;background:#f5f5f7;object-fit:cover;flex-shrink:0}.thumb.lg{width:240px;height:240px;border-radius:12px}.info{flex:1;min-width:0}.brand-tag{color:var(--color-muted);font-size:12px}.name{font-size:14px;line-height:1.4;margin:4px 0 8px}.empty{padding:60px 0;text-align:center;color:var(--color-muted)}.bottom-tabs{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:480px;height:var(--bottom-tabs-h);background:var(--color-card);border-top:1px solid var(--color-border);display:flex}.bottom-tabs a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--color-muted);font-size:11px;gap:2px}.bottom-tabs a .icon{font-size:22px;line-height:1}.bottom-tabs a.active{color:var(--color-accent)}.search-bar{padding:12px 12px 8px}.search-input{display:flex;align-items:center;background:#fff;border-radius:999px;padding:8px 14px;gap:8px;box-shadow:var(--shadow-card)}.search-input input{flex:1;border:none;outline:none;background:transparent;font-size:14px;min-width:0}.sort-bar{display:flex;background:#fff;padding:6px 16px 12px;border-bottom:1px solid var(--color-border);gap:24px}.sort-bar .item{font-size:14px;color:#606266}.sort-bar .item.active{color:var(--color-accent);font-weight:600}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:center;justify-content:center;z-index:100;padding:20px}.modal{background:#fff;border-radius:12px;max-width:360px;width:100%;padding:20px}.modal h3{margin:0 0 12px;font-size:16px}.modal .actions{display:flex;gap:8px;margin-top:16px}.modal .actions .btn{flex:1}.hero{background:#fff;padding:24px;display:flex;justify-content:center}.price-row{display:flex;justify-content:space-between;align-items:center;margin:12px 0}.price-trend{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}.price-trend .item{background:#f5f5f7;border-radius:6px;padding:4px 10px;font-size:11px;color:#606266}.history{max-height:240px;overflow-y:auto}.history-row{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid #f0f1f5;font-size:12px;color:#606266}input[type=number],input[type=text]{font-size:14px;border:1px solid var(--color-border);border-radius:8px;padding:8px 10px;outline:none;width:100%}.brand-grid{display:flex;flex-wrap:wrap;padding:0 12px 16px;gap:8px}.brand-chip{background:#fff;border-radius:8px;padding:8px 12px;font-size:13px;box-shadow:var(--shadow-card)}