:root{--bg: #f3f6fb;--card-bg: #ffffff;--primary: #1f7aff}*{box-sizing:border-box}body{margin:0;background:linear-gradient(160deg,#eef4ff,#f6fafb 40%,#fff6ee);color:#1d2530;font-family:PingFang SC,Microsoft YaHei,sans-serif}#app{min-height:100vh}