body {
    background-color: #f2f2f2;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.id-card-container {
    perspective: 1000px;
    padding-top: 50px;
}

.id-card {
    width: 500px;
    height: 300px;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 1s;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    /* Start with front side (国徽面) visible by default */
    transform: rotateY(0deg);
}

.id-card-front, .id-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    overflow: hidden;
}

.id-card-front {
    background: url('/img/2.png') no-repeat center center;
    background-size: cover;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
    box-sizing: border-box;
    /* Front is the 国徽面 */
    transform: rotateY(0deg);
}

.id-card-back {
    background: url('/img/1.png') no-repeat center center;
    background-size: cover;
    display: flex;
    padding: 20px;
    box-sizing: border-box;
    /* Back is the personal info side */
    transform: rotateY(180deg);
}

.info-section {
    margin-top: 15px;
    margin-left: 15px;
    flex: 1;
    color: #333;
    font-family: "Microsoft YaHei", sans-serif;
}

.info-item {
    margin-bottom: 12px;
    font-size: 16px;
    line-height: 1.5;
}

.info-space {
    margin-right: 20px;
}

.info-label {
    color: #1E90FF;
    display: inline-block;
    text-align: justify;
    text-align-last: justify;
    margin-left: 5px;
    margin-right: 5px;
}

.info-50 {
    width: 50px;
    margin-right: 20px;
}

.photo-section {
    width: 120px;
    height: 160px;
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-left: 20px;
    margin-top: 15px;
}

.photo-placeholder {
    font-size: 14px;
    color: #999;
}

.back-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    width: 95%;
    margin: 0 auto 20px auto;
    font-family:"仿宋", "宋体", "Microsoft YaHei", sans-serif;
}

.emblem {
    width: 100px;
    height: 100px;
    margin-right: 15px;
}

.title {
    text-align: center;
    flex: 1;
}

.main-title {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.sub-title {
    font-size: 48px;
    color: #333;
    font-weight: bold;
}

.back-footer {
    width: 100%;
    margin-top: 20px;
}

.footer-table {
    width: 90%;
    margin: 0 auto;
    border-collapse: collapse;
    font-size: 16px;
    color: #333;
}

.footer-table th, 
.footer-table td {
    padding: 8px 5px;
    text-align: center;
    vertical-align: middle;
    border: 1px solid transparent;
}

.footer-table th {
    font-weight: bold;
    width: 70px;
}

.footer-table td {
    text-align: left;
    padding-left: 15px;
    width: 0;
}

.card-number {
    position: absolute;
    bottom: 35px;
    left: 35px;
    font-size: 18px;
    letter-spacing: 2px;
    color: #333;
}

.toggle-btn {
    margin-top: 20px;
}