body {
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
    padding: 0;
}

.menu {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
    display: flex;
    justify-content: center;
}

.menu li {
    display: inline-block;
}

.menu li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

.menu li a:hover,
.menu li a.active {
    background-color: blue;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
}

.button-group {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.button-group button {
    width: 80px;
    border: 1px solid slategrey;
    background: white;
    height: 40px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    margin: 0 5px;
}

.selectColor {
    width: 100px;
    cursor: pointer;
    height: 30px;
    font-size: 16px;
    margin: 0 5px;
}

#lineWidth {
    width: 50px;
    margin: 0 5px;
}

#app {
    width: 95%;
    height: 80%;
    margin-left: 2.5%;
    border: 2px dashed #d3d3d3;
}

#canvas {
    cursor: crosshair;
}

     p {
            max-width: 600px; /* Set the maximum width of paragraphs */
            margin-left: auto; /* Center the paragraph */
            margin-right: auto; /* Center the paragraph */
            font-size: 16px; /* Optional: Set font size */
            line-height: 1.6; /* Optional: Set line height for better readability */
			 text-align: left;
        }
		
		
		#features
		{
			 text-align: left;
		}
     h2 {
					
			 max-width: 600px;		
             /* Set the maximum width of paragraphs */
            margin-left: auto; /* Center the paragraph */
            margin-right: auto; /* Center the paragraph */
            font-size: 16px; /* Optional: Set font size */
            line-height: 1.6; /* Optional: Set line height for better readability */
			 text-align: left;
        }
		
		 /* 设置 footer 的样式，使其固定在页面底部 */
footer {
    background-color: #f8f9fa;
    text-align: center;
    padding: 1rem;
}