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html - margin-top div 导致固定的 header div 向下移动

转载 作者:太空宇宙 更新时间:2023-11-04 02:35:29 25 4
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我想为标题下方的网页内容提供 70 像素的边距顶部,以便它位于标题下方。 header 有 position:fixed;这就是为什么我需要页面内容的边距顶部。

但是当我给 margin-top: 70px;对于页面内容,它也将标题向下移动了 70px。任何想法为什么?这是代码:

HTML:

<body>
<div class="header" style="position: fixed; width:100%;">
<a href="http://www.w3schools.com" >
<h5 id="app-name"
class="nav-item clickable white-text medium-text left-text">
THE VEGAN REPOSITORY
</h5>
</a>
<a href="http://www.w3schools.com" >
<h5 (click)="clicked()" id="sign-in-button"
class="nav-item clickable brand-colour-text medium-text right-text with-border">
SIGN UP FREE
</h5>
</a>
<a href="http://www.w3schools.com" >
<h5 class="nav-item clickable white-text medium-text right-text">LOGIN</h5>
</a>
<a href="#home_page_footer" >
<h5 class="nav-item clickable white-text medium-text right-text" >BLOG</h5>
</a>
<a href="#home_page_footer" >
<h5 class="nav-item clickable white-text medium-text right-text" >ABOUT</h5>
</a>
</div>
<div style="margin-bottom: 100px;margin-top:70px;" class="full-size dimmed">
<div style="z-index: -1;">
<video
style="position:fixed;"
autoplay loop muted
poster="assets/images/home_page/polina.jpg"
id="bgvid">
<!--<source src="polina.webm" type="video/webm">-->
<source src="assets/videos/polina.mp4" type="video/mp4">
</video>
</div>

<div id="motto-text" class="vertical-center" >
<h5 class="white-text medium-text">THE VEGAN REPOSITORY</h5>
<h1 id="main-text"
class=" text-center white-text light-text extra-large-text">
FIND VEGAN PRODUCTS NEAR YOU
</h1>
<a id="try-now-button"
class="with-border clickable"
href="#find-vegan-products-page" >
<h5 style="font-size:16px" class=" text-center medium-text">TRY NOW</h5>
</a>
</div>
</div>

CSS:

.header {
height: 70px;
background: #002B03;
}

.full-size {
height: 100%;
background-size: cover;
}

.dimmed:after {
content: " ";
z-index: -1;
display: block;
position: absolute;
height: 300%;
top: 0;
left: 0;
right: 0;
background: rgba(0, 0, 0, .5);
}


video#bgvid {
position: fixed;
top: 50%;
left: 50%;
min-width: 100%;
min-height: 100%;
width: auto;
height: auto;
z-index: -100;
-ms-transform: translateX(-50%) translateY(-50%);
-moz-transform: translateX(-50%) translateY(-50%);
-webkit-transform: translateX(-50%) translateY(-50%);
transform: translateX(-50%) translateY(-50%);
background: url(../assets/images/home_page/polina.jpg) no-repeat;
background-size: cover;
}

/*for ie 9*/
video { display: block; }

@media screen and (max-device-width: 800px) {
html {
background: url(../assets/images/home_page/polina.jpg) #000 no-repeat center center fixed;
}
#bgvid {
display: none;
}
}

最佳答案

我想你忘了给标题一个 top:0;

.header {
position:fixed;
left:0;
top:0;
width:100%;
height: 70px;
background: #002B03;
}

关于html - margin-top div 导致固定的 header div 向下移动,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/35742079/

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