html - 我在 iPhone 上的 h1 标签有什么问题？

Question

我有我唯一的移动网站。我正在我的 Iphone 6 上进行测试。问题是我的标题 h1 标签在您加载时没有显示。调整屏幕大小并滚动过去后，它会重新出现。任何人都可以帮忙吗？请和谢谢。代码： https
://github.com/SEGACD32XMODEL1/Websiteland/blob/master/mobile.html 网站： https ://segacd32xmodel1.github.io/Websiteland/mobile.html

<span id="animationSandbox" style="display: block;">
<div id="grad1" id="topnav" class="myTopnav" class="site__title mega" style="text-align:center;margin:auto;color:#888888;font-size:6vh;font-weight:bold;font-family:oreos;line-height:0.5;overflow-wrap:anywhere;text-align:center;" height="150vh">
    <h1 class="site__title mega" style="overflow-wrap: break-word;text-align:center;padding-top:0px;line-height:16vh"> Websiteland <br>
        <div>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/Cornhub/index.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">Cornhub</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/Twitter/Crimeaday.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">Federal Crimes</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/main.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">GamesAndMore</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/KahootSpam/index.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">KahootSpam</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/index.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">Reload</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/RB420/index.html" class="site__title mega" style="font-family:oreos; font-size:2.5vw;line-height:1.5;">Roasted Beef 420</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/School/index.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">School</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/Time.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">Time</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/SpecialUnoCards.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">Uno Special Cards</a>
        <br>
        <a href="https://SEGACD32XMODEL1.github.io/Websiteland/Websites/index.html" class="site__title mega" style="font-family:oreos;font-size:2.5vw;line-height:1.5;">Websites</a>
        </div>
    </h1>
</div>

标签： htmliosiphonemobile