* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #f0f2f5;
    padding: 20px;
    font-family: "SimSun", "宋体", serif;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 28px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 500;
}

input, select {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.btn {
    display: block;
    width: 100%;
    padding: 12px;
    background: #8B4513;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn:hover {
    background: #6b3410;
}

.cert-preview {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid #eee;
}

.cert-preview h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #666;
}

/* 高中毕业证样式 */
.certificate.high_school {
    width: 860px;
    height: 600px;
    margin: 0 auto;
    background: #f6f0e1;
    border: 12px double #b9a88e;
    position: relative;
    padding: 40px;
    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==');
    background-repeat: repeat;
}

.cert-left {
    width: 160px;
    float: left;
    text-align: center;
}

.cert-photo {
    width: 130px;
    height: 170px;
    border: 1px solid #333;
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    position: relative;
}

.cert-photo img {
    max-width: 100%;
    max-height: 100%;
}

.stamp-seal {
    width: 50px;
    height: 50px;
    border: 2px solid #888;
    border-radius: 50%;
    margin: -35px auto 10px;
    position: relative;
    z-index: 10;
    background: rgba(255,255,255,0.3);
}

.stamp-seal::after {
    content: "学籍专用";
    position: absolute;
    width: 100%;
    text-align: center;
    top: 14px;
    font-size: 10px;
    color: #666;
}

.student-id {
    font-size: 14px;
    margin-top: 10px;
    letter-spacing: 1px;
}

.cert-right {
    width: 600px;
    float: right;
    font-size: 18px;
    line-height: 2.2;
}

.cert-text {
    text-align: left;
    line-height: 2.4;
}

.fill {
    font-weight: bold;
    display: inline-block;
    min-width: 60px;
    text-align: center;
}

/* 其他证书通用样式 */
.certificate:not(.high_school) {
    width: 820px;
    height: 580px;
    margin: 0 auto;
    background: #fff9e6;
    border: 3px solid #003366;
    padding: 50px 60px;
    position: relative;
    background-image: 
        linear-gradient(rgba(0,51,102,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,51,102,0.03) 1px, transparent 1px);
    background-size: 20px 20px;
}

.cert-header {
    margin-bottom: 40px;
}

.cert-title {
    font-size: 36px;
    color: #b8860b;
    text-align: center;
    margin-bottom: 15px;
    letter-spacing: 10px;
    font-weight: bold;
    font-family: "SimHei", "黑体", sans-serif;
}

.cert-subtitle {
    text-align: center;
    font-size: 14px;
    color: #666;
    letter-spacing: 2px;
}

.cert-body {
    display: flex;
    justify-content: space-between;
    margin-bottom: 50px;
}

.cert-info {
    width: 550px;
    font-size: 18px;
    line-height: 2.5;
}

.info-line {
    display: flex;
    align-items: baseline;
    border-bottom: 1px solid #000;
    margin-bottom: 8px;
}

.info-line label {
    width: 100px;
    font-weight: normal;
    color: #000;
    margin: 0;
}

.info-line span {
    flex: 1;
    padding-left: 10px;
    font-weight: bold;
}

.info-text {
    margin-top: 25px;
    text-indent: 2em;
    line-height: 1.8;
    font-size: 16px;
}

/* 底部通用：校长/发证单位+公章+日期 */
.cert-footer {
    position: absolute;
    bottom: 50px;
    left: 60px;
    right: 60px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.principal-seal {
    font-size: 16px;
}

.seal-box {
    display: inline-block;
    width: 36px;
    height: 36px;
    border: 1px solid #000;
    text-align: center;
    line-height: 36px;
    margin-left: 10px;
    font-weight: bold;
}

.cert-issuer {
    font-size: 16px;
}

.school-stamp {
    width: 120px;
    height: 120px;
    border: 3px solid #d10000;
    border-radius: 50%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #d10000;
    font-size: 14px;
    font-weight: bold;
    letter-spacing: 1px;
    transform: rotate(-8deg);
}

.stamp-star {
    font-size: 24px;
    margin-bottom: 6px;
}

.issue-date {
    font-size: 16px;
}