body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f2f5;
}
h2 {
    color: #333;
}
input[type="file"], button {
    margin-bottom: 20px;
    padding: 10px 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: #fff;
    cursor: pointer;
    transition: border-color 0.3s ease, background-color 0.3s ease, color 0.3s ease;
}
input[type="file"]:hover, button:hover {
    border-color: #007bff;
    background-color: #007bff;
    color: #fff;
}
canvas {
    border: 2px solid #007bff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}
.container {
    max-width: 600px;
    text-align: center;
}

.xm-header {
    text-align: center;
    margin-bottom: 1.5rem;
}

.xm-title {
    color: #1a1a1a;
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.xm-desc {
    color: #666;
    font-size: 0.9rem;
}