<style> form{ width: 100%; max-width: 640px; min-width: 320px; margin: 0 auto; font-family: "Microsoft Yahei"; font-size: 20px; } input{ display: block; width: 100%; height: 30px; margin: 10px 0; } </style> ```
<style> form{ width: 100%; max-width: 640px; min-width: 320px; margin: 0 auto; font-family: "Microsoft Yahei"; font-size: 20px; } input{ display: block; width: 100%; height: 30px; margin: 10px 0; } </style> ```