/* 全局样式重置 */
    body {
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f9f9fa;
    font-family: 'Helvetica Neue', Arial, sans-serif; }

    /* 容器样式 */
    .container {
    width: 80%;
    max-width: 600px;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background-color: #fff;
    padding: 20px; }

    /* 头部样式 */
    .header {
    display: flex;
    align-items: center;
    color: #333;
    font-weight: bold;
    font-size: 24px; }

    /* 头像图片样式 */
    img.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(255, 0, 0, 0.5);
    animation: light 4s ease-in-out infinite;
    transition: transform 0.5s; }
    img.avatar:hover {
    transform: scale(1.15) rotate(720deg); }

    /* 头像动画关键帧 */
    @keyframes light {
    0% {
    box-shadow: 0 0 4px #f00; }
    25% {
    box-shadow: 0 0 16px #0f0; }
    50% {
    box-shadow: 0 0 4px #00f; }
    75% {
    box-shadow: 0 0 16px #0f0; }
    100% {
    box-shadow: 0 0 4px #f00; } }

    /* 表单样式 */
    form {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 20px; }

    input[type="text"],
    input[type="submit"] {
    width: 100%;
    height: 40px;
    margin-top: 10px;
    border-radius: 5px;
    box-sizing: border-box; }
    input[type="text"] {
    padding: 8px;
    border: 1px solid #ccc; }
    input[type="submit"] {
    margin-top: 15px;
    background-color: #0070c9;
    color: #fff;
    border: none;
    cursor: pointer; }
    input[type="text"][name="email_nr"] {
    height: 120px; }