:root{--color-primary:#1677ff;--color-primary-hover:#4096ff;--color-primary-active:#0958d9;--color-bg:#f5f7fa;--color-surface:#fff;--color-text:#1f2937;--color-text-secondary:#6b7280;--color-border:#e5e7eb;--color-error:#ef4444;--color-error-bg:#fef2f2;--radius-md:12px;--radius-lg:16px;--shadow-card:0 4px 24px #0f172a14;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--app-max-width:480px}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;-webkit-tap-highlight-color:transparent}body{min-height:100dvh;color:var(--color-text);background:var(--color-bg);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:16px;line-height:1.5}#app{min-height:100dvh}button,input{font:inherit}button{cursor:pointer}a{color:var(--color-primary)}