:root {
  color: #303133;
  background: #f0f2f5;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html, body, #app { min-height: 100%; }
body { min-width: 0; margin: 0; overflow-x: auto; }
button, input, textarea { font: inherit; }