:root { font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif; color: #172033; background: #f5f7fa; font-synthesis: none; --primary: #667eea; --primary-dark: #596fd3; --topbar: rgba(102, 126, 234, .95); --navy: #1e293b; --border: #e2e5ef; --muted: #71717a; --el-color-primary: #667eea; --el-color-primary-dark-2: #5265bb; --el-color-primary-light-3: #94a5f0; --el-color-primary-light-5: #b3bff5; --el-color-primary-light-7: #d1d8f9; --el-color-primary-light-8: #e0e5fb; --el-color-primary-light-9: #f0f2fd; }
* { box-sizing: border-box; }
html, body, #app { min-width: 320px; min-height: 100%; margin: 0; }
body { min-height: 100vh; background: #f5f7fa; }
button, input { font: inherit; }
a { color: inherit; }

@media (max-width: 720px) {
  html, body, #app { min-width: 0; }
}