调整 window 大小时,我无法摆脱 html css 中的白色边框

I can't get rid of a white border in html css when resizing the window

我正在尝试为学校做一个项目,但我遇到了无法解决的问题。 当我尝试调整 windows 的大小时(顺便说一句,我正在使用 chrome,你可以在图片中看到)我得到了一个底部滚动条,它可以工作但有一点问题......背景内的文字正在脱离它,当我向右滚动时,我有一个白色边框,其中出现了文字,但背景没有展开或 idk ... 我试过: 向左飘浮; 溢出-x:隐藏; (这有效,但我不能再使用滚动条并且不会扩展我的背景,我在其他论坛上看到过这个“解决方案”) 我不知道该怎么办...请帮助我... the picture with the code the picture with chrome

*{
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}
.backgroundColor{
    background: #1d2026;
    min-height: 100vh;
    width: 100%;
    color: #1d2026;
    position: absolute;
}

h1 p{
    text-align: center;
    padding-top: 150px;
    padding-bottom: auto;
    font-size: 200px;
    color: #29313f;

}

.roundBtn {
    font-size: 108px;
    color: #29313f;
    background: #1d2026;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0%;
    border: none;
    text-decoration: none;
    margin-top: 50px;
    margin-left: 48%;
}
h4 p{
    font-size: 40px;
    color: #ffff    
}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="css/style.css">
</head>
<body> 
<div class="backgroundColor">
    <header>
    <nav>
        <img src="images/logoT.png" class="logoTemp">    
    </nav>
    </header>
    <h1><p>welcome</p></h1>
    
    <a class="roundBtn" href="">
        <ion-icon name="chevron-forward-sharp"></ion-icon>
        <!----<h4><p>Take a look</p></h4></!---->
    </a>
</div>
<script type="module" src="https://unpkg.com/ionicons@5.5.2/dist/ionicons/ionicons.esm.js"></script>
<script nomodule src="https://unpkg.com/ionicons@5.5.2/dist/ionicons/ionicons.js"></script>
</body>
</html>

.backgroundColor class 上使用 overflow: hidden;。使用这种结构,您拥有的最佳解决方案是调整 h1 以使其适合移动视口。为此,我使用 media queries 更改 h1 font-size.

*{
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}
.backgroundColor{
    background: #1d2026;
    min-height: 100vh;
    width: 100%;
    color: #1d2026;
    position: absolute;
    overflow: hidden;
}

h1 p{
    text-align: center;
    padding-top: 150px;
    padding-bottom: auto;
    font-size: 200px;
    color: #29313f;

}

.roundBtn {
    font-size: 108px;
    color: #29313f;
    background: #1d2026;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 0%;
    border: none;
    text-decoration: none;
    margin-top: 50px;
    margin-left: 48%;
}
h4 p{
    font-size: 40px;
    color: #ffff    
}

@media only screen and (max-width: 800px) {
  h1 p {
    font-size: 7rem;
  }
}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="css/style.css">
</head>
<body> 
<div class="backgroundColor">
    <header>
    <nav>
        <img src="images/logoT.png" class="logoTemp">    
    </nav>
    </header>
    <h1><p>welcome</p></h1>
    
    <a class="roundBtn" href="">
        <ion-icon name="chevron-forward-sharp"></ion-icon>
        <!----<h4><p>Take a look</p></h4></!---->
    </a>
</div>
<script type="module" src="https://unpkg.com/ionicons@5.5.2/dist/ionicons/ionicons.esm.js"></script>
<script nomodule src="https://unpkg.com/ionicons@5.5.2/dist/ionicons/ionicons.js"></script>
</body>
</html>

显然,您可以根据需要随意调整尺寸。