body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-size: 100% 100%;
    /* 確保圖片覆蓋整個背景 */
    background-position: center center;
    /* 確保圖片居中 */
    background-repeat: no-repeat;
    /* 防止圖片重覆 */
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.content {
    padding: 20px;
    border-radius: 5px;
    text-align: center;
    width: 100%;
    max-width: 500px;
    padding-top: 50px;
}