lank"><img
                    src="img/nuslogo.png"></a>
            <a href="https://www.xidian.edu.cn" alt="西安电子科技大学 Xidian University" target="_blank"><img
                    src="img/xidian.png"></a>
        </div>

    </div>

    <div style="padding: 10px; text-align: center;vertical-align: middle;" v-else>
        <div v-if="lang=='en'">
            <div v-if="step == -1">
                <h4 style="margin-top: 20px">Copyright and Disclaimer</h4>
                <p>Please carefully 