<style>
.banner_support_forum{margin: 50px auto;text-align: center;width: 80%;}
.banner_support_forum .banner-1 img{width: 100%;}
</style>

<div class="banner_support_forum">
    <a target="_blank" href="https://goo.gl/MU6pTN#no-topic-0" class="banner-1">
        <img src="<?php echo SFSI_PLUS_PLUGURL; ?>images/banner_support_forum.png">
    </a>
</div>
