<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <title>画板手写测试页面</title>
	<script src="./static/jquery-3.6.1.min.js"></script>
	<style>
        body {display: flex;flex-direction: column;align-items: center;justify-content: center;height: 100vh;}
        #canvas {background-color: black;}
        .buttons-container {display: flex;justify-content: space-between;width: 280px;margin-top: 10px;}