body {
    margin: 0;
    padding: 20px;
    background-color: #f5f7fa;
    font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px 20px;
    text-align: center;
}

.header h1 {
    margin: 0;
    font-size: 28px;
    font-weight: 300;
}

.header p {
    margin: 10px 0 0 0;
    opacity: 0.9;
}

.main-content {
    padding: 30px;
}

.form-section {
    margin-bottom: 0px;
}

.result-section {
    margin-top: 0px;
}

.student-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.student-card {
    background: #fff;
    border-radius: 0;
    overflow: hidden;
    border-bottom: 1px solid #eee;
    cursor: pointer;
}

.student-card.payable {
    background: #f0f9ff;
}

.student-card.paid {
    background: #fff8f0;
}

.student-info-card {
    background: #f8f9fa;
    border-left: 4px solid  #667eea;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: #f5f7fa;
    color: #303133;
}

.card-header h4 {
    margin: 0;
    font-size: 16px;
    font-weight: 500;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    border-top: 1px solid #eee;
    background: #fafafa;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.info-item {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    line-height: 200%;
    border-bottom: 1px solid var(--el-border-color);
}

.info-label {
    color: #909399;
    min-width: 120px;
    margin-right: 10px;
    text-align: left;
}

.info-value {
    font-weight: bold;
    color: #303133;
    text-align: right;
    margin-left: auto;
}



.payment-content {
    text-align: center;
}

.payment-title {
    font-size: 20px;
    font-weight: 600;
    color: #303133;
    margin: 0 0 12px 0;
}

.payment-desc {
    font-size: 14px;
    color: #606266;
    margin: 0 0 20px 0;
    line-height: 1.5;
}

.amount-display {
    font-size: 36px;
    font-weight: 700;
    color: #e6a23c;
    margin: 20px 0;
    text-shadow: 0 2px 4px rgba(230, 162, 60, 0.2);
    font-family: 'Arial', sans-serif;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

@media (max-width: 768px) {
    body {
        padding: 5px;
    }
    
    .container {
        margin: 0;
        border-radius: 0;
    }
    
    .main-content {
        padding: 15px;
    }
    
    .header {
        padding: 15px 10px;
    }
    
    .header h1 {
        font-size: 24px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

.icon-arrow-right {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: -0.15em;
    fill: currentColor;
}