*{box-sizing:border-box;margin:0;padding:0}:root{--primary:#ff2442;--primary-dark:#e01e38;--price:#ff2442;--text:#333;--text-2:#999;--bg:#f5f5f5;--card:#fff;--radius:12px;--orange:#ff9500}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif}.app{max-width:100%}.topbar{z-index:10;background:var(--primary);color:#fff;align-items:center;gap:12px;padding:10px 16px;display:flex;position:sticky;top:0}.logo{white-space:nowrap;font-size:18px;font-weight:700}.search-box{background:#fff;border-radius:20px;flex:1;align-items:center;padding:0 12px;display:flex}.search-box input{background:0 0;border:none;outline:none;flex:1;padding:8px 0;font-size:14px}.search-box button{cursor:pointer;color:var(--primary);background:0 0;border:none;font-size:16px}.plat-bar{background:var(--card);align-items:center;gap:10px;padding:8px 12px 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