:root{--primary: #ff4d4f;--primary-dark: #e6333a;--bg: #f5f5f5;--card-bg: #ffffff;--text: #333333;--text-sub: #999999;--border: #eeeeee}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body{height:100%;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:14px}#app{max-width:640px;margin:0 auto;min-height:100vh;position:relative}button{-webkit-appearance:none;appearance:none;border:none;background:none;cursor:pointer;font-family:inherit}input{font-family:inherit}::-webkit-scrollbar{width:0;height:0}