body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: auto;
}

.layui-container {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
}

.layui-form-label {
    float: none;
    width: 100%;
    text-align: left;
    padding: 5px 0;
    font-weight: 400;
    line-height: 20px;
    display: block; /* 使 label 换行 */
}

.layui-form-item .layui-input-block{
    margin-left: 0; /* 移除默认的左边距 */
}
#signatureCanvas {
    background-color: #fff;
    cursor: crosshair;
    border: 1px solid #eee;
    touch-action: none; /* 禁用默认的触摸行为 */
}
#submit.layui-btn{ width: 100%;}
h1 {text-align: center;}
/* styles.css */
#registrationNumber {
    background-color: #f0f0f0; /* 背景灰色 */
    color: #808080; /* 文字灰色 */
    pointer-events: none; /* 鼠标不可选 */
}
/* styles.css */
.required-label::before {
    content: '*';
    color: red;
    margin-right: 5px;
}
.layui-upload-list img.layui-upload-img{ max-width: 60%;}